CN107300817B - Blue phase liquid crystal display panel and preparation method thereof, display device and driving method thereof - Google Patents

Abstract

The invention discloses a blue-phase liquid crystal display panel and a preparation method thereof, a display device and a driving method thereof, and relates to the field of display technology. quality issue. The blue phase liquid crystal display panel includes a first display area and a second display area, the horizontal electric field component of the driving electric field in the first display area is smaller than the horizontal electric field component of the driving electric field in the second display area, and the direction of the horizontal electric field component is parallel to the array substrate The blue phase liquid crystal display panel also includes: a brightness control unit arranged between the array substrate and the color filter substrate, the orthographic projection of the brightness control unit on the array substrate is at least the same as the orthographic projection of the first display area on the array substrate Partially overlapping; the brightness control unit is used to display a bright state when the first display area displays a bright state, and display a dark state when the first display area displays a dark state. The blue phase liquid crystal display panel provided by the present invention is used for display.

Description

Blue phase liquid crystal display panel and preparation method thereof, display device and driving method thereof

technical field

The invention relates to the field of display technology, and in particular, to a blue-phase liquid crystal display panel and a preparation method thereof, a display device and a driving method thereof.

Background technique

With the continuous development of display technology, there are more and more types of display devices. Among them, blue-phase liquid crystal display devices have received extensive attention due to their advantages such as short response time, high display resolution, and reduced dynamic artifacts. The working principle of blue-phase liquid crystal display devices is based on the Kerr effect of blue-phase liquid crystals, that is, macroscopically, blue-phase liquid crystals exhibit optical isotropy. When the blue phase liquid crystal display device is working, the external electric field acts on the blue phase liquid crystal through the pixel electrode and the common electrode. Under the action of the external electric field, the blue phase liquid crystal can become an optical uniaxial crystal, and its optical axis direction is parallel to the electric field direction. , when the linearly polarized light passes through the blue phase liquid crystal in the direction perpendicular to the electric field, it will be decomposed into two linearly polarized lights, one beam of light vector is along the direction of the electric field, and the other beam of light vector is perpendicular to the electric field.

Since the driving voltage of the blue-phase liquid crystal display device is inversely proportional to the Kerr constant of the blue-phase liquid crystal and proportional to the device parameters, and the Kerr constant of the liquid crystal is proportional to the birefringence Δn of the liquid crystal and the dielectric anisotropy constant Δε, Due to the limited increase of the Δn and Δε values of the liquid crystal, the effect of reducing the driving voltage of the blue-phase liquid crystal is limited, resulting in a large driving voltage of the blue-phase liquid crystal display device, generally tens of volts. In order to solve the problem that the driving voltage of the blue-phase liquid crystal display device is relatively large, the electrode structure in the blue-phase liquid crystal display device is optimized in the prior art, for example, the pixel electrode and the common electrode are prepared into rectangular or oval cross-sections Stripe structure electrodes, or increase the thickness of pixel electrodes and common electrodes. Although this method of optimizing the electrode structure can reduce the driving voltage in the blue-phase liquid crystal display device, the horizontal electric field component above the electrodes is very small after the electric field is applied. The light efficiency of the liquid crystal is very low, which leads to a low overall transmittance of the blue-phase liquid crystal display device when it is displayed in a bright state, which affects the quality of the display image.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a blue-phase liquid crystal display panel and a preparation method thereof, a display device and a driving method thereof, which are used in the existing blue-phase liquid crystal display device when the transmittance is low during bright state display, which affects the quality of the display image. question.

In order to achieve the above object, the present invention provides the following technical solutions:

A first aspect of the present invention provides a blue phase liquid crystal display panel, comprising an array substrate and a color filter substrate arranged oppositely, and a blue phase liquid crystal arranged between the array substrate and the color filter substrate, the blue phase liquid crystal The liquid crystal display panel also includes a first display area and a second display area, and the horizontal electric field component of the driving electric field used for driving the deflection of the blue-phase liquid crystal in the first display area is smaller than that of the driving electric field in the second display area. The horizontal electric field component of the region, the direction of the horizontal electric field component is parallel to the array substrate; the blue-phase liquid crystal display panel further includes: a brightness control unit disposed between the array substrate and the color filter substrate, the The orthographic projection of the brightness control unit on the array substrate at least partially overlaps with the orthographic projection of the first display area on the array substrate; the brightness control unit is used to display bright lights in the first display area Displays the bright state when it is in the state.

Further, the brightness control unit is further configured to display a dark state when the first display area displays a dark state.

Further, the orthographic projection of the brightness control unit on the array substrate coincides with the orthographic projection of the first display area on the array substrate.

Further, the first display area includes at least one first sub-display area, and the brightness control unit includes at least one brightness control sub-unit corresponding to the at least one first sub-display area one-to-one. The unit includes a first control electrode and a second control electrode arranged oppositely, and a microcapsule polymer layer arranged between the first control electrode and the second control electrode; wherein, in the microcapsule polymer layer Including black charged particles and white charged particles of opposite polarities; a control electric field is generated between the first control electrode and the second control electrode, and the control electric field is used to control the microcapsule polymer layer. The black charged particles and the white charged particles move, so that when the corresponding first sub-display area displays a bright state, the white charged particles are close to the display side of the blue-phase liquid crystal display panel relative to the black charged particles, When the corresponding first sub-display area displays a dark state, the white charged particles are far away from the display side of the blue-phase liquid crystal display panel relative to the black charged particles.

Further, an entire layer of first common electrodes is disposed on the array substrate, and at least one strip-shaped first pixel electrode is disposed on the first common electrode, and the first common electrode and the at least one first pixel electrode are disposed on the array substrate. The driving electric field is generated between the first pixel electrodes of the stripe structure; the first pixel electrodes are multiplexed as the first control electrodes.

Further, at least one second common electrode in a stripe structure and at least one second pixel electrode in a stripe structure are arranged on the array substrate, and the at least one second common electrode and the at least one second pixel electrode alternate the adjacent second common electrodes and the second pixel electrodes are spaced apart, and the driving electric field is generated between the adjacent second common electrodes and the second pixel electrodes; the The second common electrode and the second pixel electrode are multiplexed as the first control electrode.

Based on the technical solution of the blue-phase liquid crystal display panel, a second aspect of the present invention provides a blue-phase liquid crystal display device, including the above-mentioned blue-phase liquid crystal display panel.

Based on the technical solution of the blue-phase liquid crystal display device, a third aspect of the present invention provides a driving method for a blue-phase liquid crystal display device, which is applied to the blue-phase liquid crystal display device. The control signal enables the brightness control unit to display the bright state when the first display area displays the bright state.

Further, the driving method further includes: applying a control signal to the brightness control unit, so that the brightness control unit displays a dark state when the first display area displays a dark state.

Further, the first display area includes at least one first sub-display area, and the brightness control unit includes at least one brightness control sub-unit corresponding to the at least one first sub-display area one-to-one. The unit includes a first control electrode and a second control electrode arranged oppositely, and a microcapsule polymer layer arranged between the first control electrode and the second control electrode; the microcapsule polymer layer includes a polar black charged particles and white charged particles with opposite properties; the applying a control signal to the brightness control unit specifically includes: when the corresponding first sub-display area displays a bright state, during the bright state display preparation period, in the A first control signal is applied to the first control electrode, and a second control signal is applied to the second control electrode, so that a first control electric field is generated between the first control electrode and the second control electrode, and the The first control electric field controls the movement of the black charged particles and the white charged particles in the microcapsule polymer layer, so that the white charged particles are close to the blue phase liquid crystal display device relative to the black charged particles. Display side; when the corresponding first sub-display area displays a dark state, in the dark state display preparation period, a third control signal is applied to the first control electrode, and a fourth control signal is applied to the second control electrode a control signal such that a second control electric field is generated between the first control electrode and the second control electrode, the second control electric field controls the black charged particles in the microcapsule polymer layer and the The white charged particles move so that the white charged particles are kept away from the display side of the blue-phase liquid crystal display device relative to the black charged particles.

Based on the technical solution of the blue-phase liquid crystal display panel, a fourth aspect of the present invention provides a preparation method of a blue-phase liquid crystal display panel for preparing the above-mentioned blue-phase liquid crystal display panel. The preparation method includes: providing an array substrate and A color filter substrate; a brightness control unit is formed between the array substrate and the color filter substrate, and the orthographic projection of the brightness control unit on the array substrate is the same as the orthographic projection of the first display area on the array substrate At least partially overlapping, the brightness control unit is configured to display a bright state when the first display area displays a bright state.

Further, the first display area includes at least one first sub-display area, and the brightness control unit includes at least one brightness control sub-unit corresponding to the at least one first sub-display area one-to-one. The unit includes a first control electrode and a second control electrode arranged oppositely, and a microcapsule polymer layer arranged between the first control electrode and the second control electrode; the microcapsule polymer layer includes a polar black charged particles and white charged particles with opposite properties; a whole-layer first common electrode is provided on the array substrate, and at least one strip-shaped first pixel electrode is provided on the first common electrode, and the first common electrode is provided on the array substrate. The driving electric field is generated between a common electrode and the first pixel electrode of the at least one stripe structure; the forming a brightness control unit between the array substrate and the color filter substrate includes: forming the color filter substrate on the color filter substrate A second control electrode is formed on the second control electrode; a microcapsule polymer layer is formed on the second control electrode; the first pixel electrode is multiplexed as the first control electrode.

Further, forming the microcapsule polymer layer on the second control electrode includes: mixing white charged particles, black charged particles and polymer monomers to prepare a mixed solution; using the mixed solution, coating process, forming a microcapsule polymer film covering the color filter substrate; patterning the microcapsule polymer film to form a microcapsule polymer layer on the second control electrode.

The blue phase liquid crystal display panel provided by the present invention includes a brightness control unit disposed between the array substrate and the color filter substrate, and the orthographic projection of the brightness control unit on the array substrate is the same as the orthographic projection of the first display area on the array substrate. The projections are at least partially overlapped. Since the brightness control unit can display the bright state when the first display area displays the bright state, the brightness control unit plays a certain role in improving the display brightness of the first display area. Therefore, the present invention provides When the blue-phase liquid crystal display panel is applied to the blue-phase liquid crystal display device, it can well avoid the overall transparency of the blue-phase liquid crystal display device during the bright state display due to the small horizontal electric field component above the electrodes and the low liquid crystal light efficiency. The over-rate is low, which affects the quality of the displayed picture.

Description of drawings

The accompanying drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic structural diagram of a blue-phase liquid crystal display panel in the prior art when no driving signal is applied;

2 is a schematic structural diagram of a blue-phase liquid crystal display panel in the prior art after driving signals are applied;

3 is a schematic diagram of a display state of a blue-phase liquid crystal display panel in a bright state display period in the prior art;

FIG. 4 is a first structural schematic diagram of a blue-phase liquid crystal display panel provided in an embodiment of the present invention in a dark state display period;

5 is a schematic diagram of a display state of a blue-phase liquid crystal display panel provided in an embodiment of the present invention in a dark state display period;

6 is a schematic diagram of a first structure of a blue-phase liquid crystal display panel provided in an embodiment of the present invention in a bright-state display period;

7 is a schematic diagram of a display state of a blue-phase liquid crystal display panel provided in an embodiment of the present invention during a bright-state display period;

8 is a schematic diagram of a second structure of a blue-phase liquid crystal display panel provided in an embodiment of the present invention in a bright-state display period;

FIG. 9 is a schematic diagram of a second structure of the blue-phase liquid crystal display panel provided in an embodiment of the present invention in a dark state display period;

FIG. 10 is a third structural schematic diagram of a blue-phase liquid crystal display panel provided in an embodiment of the present invention in a bright state display period.

Reference number:

1-Array substrate, 2-Color filter substrate,

3-Blue phase liquid crystal, 4-Second control electrode,

41-Class II second control electrode, 42-Class II second control electrode,

5- Microcapsule polymer layer, 6- Black charged particles,

7-white charged particles, 8-first common electrode,

9-first pixel electrode, 10-second common electrode,

11-Second pixel electrode, 12-Lower polarizer,

13- Upper polarizer, 14- Color graphics,

15- black matrix, 16- flat layer,

17-Blue phase liquid crystal display panel, A-First sub-display area,

B-Second sub-display area.

Detailed ways

In order to further illustrate the blue-phase liquid crystal display panel and the preparation method thereof, the display device and the driving method thereof provided by the embodiments of the present invention, the following detailed description is given with reference to the accompanying drawings.

As described in the background art, the working principle of the blue-phase liquid crystal display device is based on the Kerr effect of the blue-phase liquid crystal. The electrode plate acts on the blue phase liquid crystal. Under the action of the external electric field, the blue phase liquid crystal becomes an optical uniaxial crystal, and its optical axis direction is parallel to the direction of the electric field. When the linearly polarized light passes through the blue phase liquid crystal in the direction perpendicular to the electric field , will be decomposed into two linearly polarized lights, one with the light vector along the direction of the electric field, and the other with the light vector perpendicular to the electric field.

According to the standard Kerr cell structure, the voltage is applied between two parallel electrode plates, that is, the electric field is perpendicular to the electrode plates, and the incident light must be incident between the two parallel electrode plates to be perpendicular to the electric field. , the incident light is incident perpendicular to the two parallel transparent electrode plates. To generate an electric field perpendicular to the incident light, the two parallel transparent electrode plates are generally fabricated on the same substrate, such as an array substrate, so that the generated electric field has the same The horizontal electric field component parallel to the array substrate, when the incident light is incident perpendicular to the array substrate, satisfies the condition that the incident light is perpendicular to the horizontal electric field component.

Since the relationship between the birefringence Δn of the blue phase liquid crystal and the electric field E and the wavelength λ of the incident light is:

Δn=λKE ² Formula (1)

That is, the relationship between the Kerr constant K of the blue phase liquid crystal and the basic physical parameters of the blue phase liquid crystal is:

In formula (2), Δε represents the dielectric anisotropy constant, k represents the elastic constant, and P represents the pitch. It can be seen from formula (2) that the Kerr constant K of the blue-phase liquid crystal is proportional to the birefringence Δn and the dielectric anisotropy constant Δε of the blue-phase liquid crystal, but due to the limited increase in the values of Δn and Δε, the blue The increase of the Kerr constant K of the liquid crystal is limited, and the driving voltage of the blue phase liquid crystal display device is inversely proportional to the Kerr constant of the liquid crystal, so the driving voltage of the blue phase liquid crystal display device is large.

In the prior art, the above problem of large driving voltage is generally solved by optimizing the structure of the electrodes. More specifically, as shown in FIG. 1 , the blue phase liquid crystal display device in the prior art generally includes array substrates arranged oppositely. 1 and a color filter substrate 2, and a blue phase liquid crystal 3 disposed between the array substrate 1 and the color filter substrate 2; wherein a lower polarizer 12 is arranged on the side of the array substrate 1 away from the blue phase liquid crystal 3, and a lower polarizer 12 is arranged on the array substrate 1 The side close to the blue-phase liquid crystal 3 is provided with a strip-shaped common electrode and a strip-shaped pixel electrode; an upper polarizer 13 is provided on the side of the color filter substrate 2 away from the blue phase liquid crystal 3, One side of the blue-phase liquid crystal 3 is provided with a black matrix 15 , a color pattern 14 and a flat layer 16 . It is worth noting that the polarization directions of the light transmission axes of the above-mentioned upper polarizer 13 and lower polarizer 12 are vertical. When the blue phase liquid crystal display device is not powered on, the blue phase liquid crystal 3 presents an isotropic state. After the linearly polarized light transmitted through 12 passes through the blue phase liquid crystal 3, the polarization direction remains unchanged and cannot pass through the upper polarizer 13, so that the blue phase liquid crystal display device displays a black state.

When a driving signal is applied to the common electrode of the stripe structure and the pixel electrode of the stripe structure, so that a driving electric field is generated between the common electrode and the pixel electrode, as shown in FIG. 2 and FIG. 3 , the blue phase liquid crystal 3 is deflected, so that the The blue-phase liquid crystal display device can realize picture display. When the blue-phase liquid crystal display device performs screen display, the horizontal component of the driving electric field between the common electrode and the pixel electrode is relatively large, and the driving electric field with the large horizontal component can make the blue-phase liquid crystal located between the common electrode and the pixel electrode 3. Birefringence is generated to act as a light switch, so that the area between the common electrode and the pixel electrode (that is, the second display area included in the blue-phase liquid crystal display panel 17, the second display area includes a plurality of second sub Display area B) has a good light effect. However, since the horizontal component of the driving electric field directly above the common electrode and the pixel electrode is small, the driving electric field with the small horizontal component induces little birefringence in the blue-phase liquid crystal 3 directly above the common electrode and the pixel electrode. As a result, the light efficiency of the area directly above the common electrode and the pixel electrode (ie, the first display area included in the blue-phase liquid crystal display panel 17, which includes a plurality of first sub-display areas A) is low; When the phase liquid crystal display device actually performs bright state display, there is a display dark area with low liquid crystal light efficiency, so that the overall light efficiency of the blue phase liquid crystal display device is low, which affects the overall transmittance of the blue phase liquid crystal display device.

Based on the existence of the above problems, please refer to FIG. 6 and FIG. 8 , an embodiment of the present invention provides a blue-phase liquid crystal display panel 17 . The blue-phase liquid crystal display panel 17 includes: an array substrate 1 and a color filter substrate 2 , which are arranged opposite to each other. And the blue phase liquid crystal 3 disposed between the array substrate 1 and the color filter substrate 2, the blue phase liquid crystal display panel 17 further includes a first display area and a second display area, and the driving electric field used for driving the deflection of the blue phase liquid crystal 3 is in the first display area. The horizontal electric field component of the first display area is smaller than the horizontal electric field component of the driving electric field in the second display area, and the direction of the horizontal electric field component is parallel to the array substrate 1; the blue phase liquid crystal display panel 17 further includes: The brightness control unit between 2, the orthographic projection of the brightness control unit on the array substrate 1 at least partially overlaps with the orthographic projection of the first display area on the array substrate 1; is displayed when the light is on.

In practical application of the above-mentioned blue phase liquid crystal display panel 17, when the first display area included in the blue phase liquid crystal display panel 17 is to display a bright state, as shown in FIG. 7, a control signal is applied to the brightness control unit, so that the brightness control unit generates The electric field is controlled, and the brightness control unit displays a bright state under the control of the control electric field, thereby improving the display brightness of the first display area.

According to the specific structure of the blue-phase liquid crystal display panel 17 and the display state during practical application, the blue-phase liquid crystal display panel 17 provided by the embodiment of the present invention includes a brightness control unit disposed between the array substrate 1 and the color filter substrate 2, And the orthographic projection of the brightness control unit on the array substrate 1 and the orthographic projection of the first display area on the array substrate 1 at least partially overlap, because the brightness control unit can display the bright state when the first display area displays the bright state, so that the The brightness control unit plays a certain role in improving the display brightness of the first display area. Therefore, when the blue-phase liquid crystal display panel 17 provided by the embodiment of the present invention is applied to a blue-phase liquid crystal display device, it is well avoided due to the electrode The upper horizontal electric field component is very small, and the light efficiency of the liquid crystal is very low, resulting in a low overall transmittance of the blue-phase liquid crystal display device during bright state display, which affects the quality of the display image.

Since the blue-phase liquid crystal display panel 17 is in actual display, there may be a dark state display according to the actual display needs. When the blue-phase liquid crystal display panel 17 performs dark state display, the corresponding first display area will be dark state. In order to avoid the influence of the brightness control unit on the dark state display effect of the first display area, the brightness control unit is further configured to display the dark state when the first display area displays the dark state. Specifically, as shown in FIG. 4 and FIG. 5 , when the first display area included in the blue-phase liquid crystal display panel 17 is to display a dark state, another control signal is applied to the brightness control unit, so that the brightness control unit generates a corresponding control electric field , under the control of the control electric field, the brightness control unit can display a dark state, thereby reducing the display brightness of the first display area.

Since the above-mentioned brightness control unit can display a dark state when the first display area displays a dark state, the brightness control unit not only avoids affecting the dark state display effect of the first display area, but also can further reduce the display of the first display area. Brightness, so that the first display area can achieve a better dark state display effect.

To sum up, since the brightness control unit can display a bright state when the first display area displays a bright state, and display a dark state when the first display area displays a dark state, the brightness control unit can The light effect of the first display area is adjusted accordingly, so that the blue-phase liquid crystal display panel 17 can achieve a good display effect in different display states.

In order to better control the display light efficiency of the blue-phase liquid crystal display panel 17, preferably, the orthographic projection of the brightness control unit on the array substrate 1 is set to overlap with the orthographic projection of the first display area on the array substrate 1, so that brightness control The unit can completely control the light effect of the first display area, so that when the first display area needs to display the bright state, the brightness control unit displays the bright state, which improves the overall display brightness of the first display area, so that the first display area has a good brightness. Bright state display: when the first display area needs to display a dark state, the brightness control unit displays a dark state, further reducing the overall display brightness of the first display area, so that the first display area has a good dark state display.

The first display area provided in the above embodiment includes at least one first sub-display area A, and the brightness control unit includes at least one brightness control sub-unit corresponding to the at least one first sub-display area A one-to-one. Preferably, the brightness control unit The orthographic projection of the subunits on the array substrate 1 coincides with the orthographic projection of the corresponding first sub-display area A on the array substrate 1 .

The above-mentioned brightness control subunit has various structures. The specific structure of a brightness control subunit is given below, and its corresponding working conditions in different display states are described in detail.

As shown in FIG. 4 , FIG. 6 and FIG. 8 , the brightness control subunit specifically includes: a first control electrode and a second control electrode 4 arranged oppositely, and a Capsule polymer layer 5; wherein, the microcapsule polymer layer 5 includes black charged particles 6 and white charged particles 7 with opposite polarities; a control electric field is generated between the first control electrode and the second control electrode 4, and the control electric field is used for The black charged particles 6 and the white charged particles 7 in the microcapsule polymer layer 5 are controlled to move, so that when the corresponding first sub-display area A displays a bright state, the white charged particles 7 are close to the blue phase liquid crystal relative to the black charged particles 6 On the display side of the display panel 17 (see FIGS. 6 and 8 ), when the corresponding first sub-display area A displays a dark state, the white charged particles 7 are farther from the display side of the blue phase liquid crystal display panel 17 than the black charged particles 6 ( See Figure 7).

It is worth noting that the thickness of the microcapsule polymer layer 5 is determined by the designed cell thickness of the blue phase liquid crystal display panel 17 and the heights of the common electrodes and pixel electrodes provided on the array substrate 1. The thickness of the capsule polymer layer 5 is set to be 0.5um to 4.9um. The microcapsule polymer layer 5 of this thickness can not only meet the cell thickness of the designed blue phase liquid crystal display panel 17, but also the height requirements of the common electrode and the pixel electrode. , and more black charged particles 6 and white charged particles 7 can be accommodated, so that the brightness control subunit can better realize bright state display and dark state display.

In more detail, the first control electrode and the second control electrode 4 are disposed opposite to each other, and a control electric field perpendicular to the array substrate 1 can be generated between the first control electrode and the second control electrode 4, and the microcapsule polymer layer 5 is provided between the first control electrode and the second control electrode 4, so that the black charged particles 6 and the white charged particles 7 included in the microcapsule polymer layer 5 can move under the control of the control electric field.

The specific control method of the brightness control unit will be described below by taking the example that the white charged particles 7 are positively charged and the black charged particles 6 are negatively charged.

When the first sub-display area A displays a bright state, referring to FIGS. 6-8 , the specific control process for the brightness control sub-unit corresponding to the first sub-display area A is as follows: apply a first control on the first control electrode signal, the second control signal is applied on the second control electrode 4, and the voltage value of the first control signal is greater than the voltage value of the second control signal, so that the first control signal is generated between the first control electrode and the second control electrode 4 The first controlled electric field controls the movement of the black charged particles 6 and the white charged particles 7 in the microcapsule polymer layer 5 so that the white charged particles 7 are closer to the display side of the blue phase liquid crystal display panel 17 relative to the black charged particles 6 .

When the first sub-display area A displays a dark state, referring to FIG. 4 and FIG. 5 , the specific control process for the brightness control sub-unit corresponding to the first sub-display area A is as follows: a third control is applied on the first control electrode signal, the fourth control signal is applied on the second control electrode 4, and the voltage value of the third control signal is smaller than the voltage value of the fourth control signal, so that the second control signal is generated between the first control electrode and the second control electrode 4 electric field, the second control electric field controls the movement of the black charged particles 6 and the white charged particles 7 in the microcapsule polymer layer 5, so that the white charged particles 7 are away from the display side of the blue phase liquid crystal display panel 17 relative to the black charged particles 6; It should be noted that the display side of the blue phase liquid crystal display panel 17 is the side that displays the image to the user, and is opposite to the side where the backlight source of the blue phase liquid crystal display panel 17 is located.

It should be noted that when a control signal is applied to the above-mentioned first control electrode and second control electrode 4, the first control signal and the third control signal can be set to the same signal, and at this time, it is only necessary to apply an appropriate first control signal as required. The second control signal and the fourth control signal are sufficient, or the second control signal and the fourth control signal are set to be the same signal, and only the appropriate first control signal and the third control signal need to be applied at this time.

In addition, as shown in FIG. 9-FIG. 10, different control signals can be applied to the second control electrode 4 according to actual needs during dark state display and bright state display, so that the second control electrode 4 can be controlled according to the applied control signal. Different signals are divided into one type of second control electrodes 41 and two types of second control electrodes 42 .

Since the existing array substrate 1 is provided with a common electrode and a pixel electrode for generating a driving electric field, and the common electrode and the pixel electrode are arranged in various ways, in order to simplify the preparation process of the brightness control sub-unit, different electrode arrangement methods are used. , it is possible to consider multiplexing the existing common electrode and/or pixel electrode as the first control electrode, which is described as follows:

In the first arrangement, as shown in FIG. 8 , a whole-layer first common electrode 8 is arranged on the array substrate 1 , and at least one strip-shaped first pixel electrode 9 is arranged on the first common electrode 8 . A driving electric field for driving the deflection of the blue-phase liquid crystal 3 is generated between the common electrode 8 and the first pixel electrode 9 of at least one stripe structure.

For the first arrangement, the at least one strip-shaped first pixel electrode 9 corresponds to at least one first sub-display area A included in the first display area in a one-to-one correspondence, and is directly above each first pixel electrode 9 A corresponding first sub-display area A is formed, and the orthographic projection of each first pixel electrode 9 on the array substrate 1 coincides with the orthographic projection of the corresponding first sub-display area A on the array substrate 1 . A corresponding second sub-display area B is formed between adjacent first pixel electrodes 9 (the second display area includes at least one second sub-display area B), and the area between adjacent first pixel electrodes 9 is in the array The orthographic projection on the substrate 1 coincides with the orthographic projection of the corresponding second sub-display area B on the array substrate 1 .

Based on the above arrangement, when forming the brightness control subunit, the first pixel electrode 9 can be multiplexed as the first control electrode. , the first pixel electrode 9 corresponding to the first sub-display area A can be multiplexed as the first control electrode of the brightness control sub-unit corresponding to the first sub-display area A, so that when forming the brightness control sub-unit , only the second control electrode 4 and the microcapsule polymer layer 5 included in the brightness control subunit need to be formed, which simplifies the preparation process of the brightness control subunit.

When the first pixel electrode 9 is multiplexed as the first control electrode, the specific driving method for the brightness control subunit is as follows:

During the bright-state display preparation period, the first control signal is applied to the multiplexed first pixel electrode 9 and the second control signal is applied to the second control electrode 4 to make the black charged particles 6 in the microcapsule polymer layer 5 Move with the white charged particles 7 so that the white charged particles 7 are closer to the display side of the blue phase liquid crystal display panel 17 than the black charged particles 6 , and then turn off the first control signal and the second control signal. It is worth noting that both the applied first control signal and the second control signal are DC signals.

During the bright-state display period, the first AC signal for enabling the blue-phase liquid crystal display panel 17 to achieve normal bright-state display is applied to the first pixel electrode 9 , and the corresponding DC signal is applied to the first common electrode 8 .

During the dark state display preparation period, a third control signal is applied to the multiplexed first pixel electrode 9 and a fourth control signal is applied to the second control electrode 4 to make the black charged particles 6 in the microcapsule polymer layer 5 Move with the white charged particles 7 to keep the white charged particles 7 away from the display side of the blue phase liquid crystal display panel 17 relative to the black charged particles 6, and then turn off the third control signal and the fourth control signal. It is worth noting that the applied third control signal and the fourth control signal are both DC signals.

During the dark state display period, a second AC signal for enabling the blue phase liquid crystal display device to achieve normal dark state display is applied to the first pixel electrode 9 , and a corresponding DC signal is applied to the first common electrode 8 .

In the second arrangement, as shown in FIG. 4 and FIG. 6 , the array substrate 1 is provided with at least one second common electrode 10 in a stripe structure and at least one second pixel electrode 11 in a stripe structure, and at least one second common electrode 11 is disposed on the array substrate 1 . The electrodes 10 and at least one second pixel electrode 11 are alternately arranged, and there is a distance between the adjacent second common electrodes 10 and the second pixel electrodes 11, and the gap between the adjacent second common electrodes 10 and the second pixel electrodes 11 is generated. The driving electric field for driving the deflection of the blue-phase liquid crystal 3 .

For the second arrangement, a corresponding first sub-display area A is formed directly above each second pixel electrode 11 , and a corresponding first sub-display area A is formed directly above each second common electrode 10 , namely The orthographic projection of the first sub-display area A on the array substrate 1 coincides with the orthographic projection of the corresponding second pixel electrode 11 on the array substrate 1 , or the orthographic projection of the corresponding second common electrode 10 on the array substrate 1 . ; A corresponding second sub-display area B is formed between the adjacent second pixel electrodes 11 and the second common electrodes 10 (the second display area includes at least one second sub-display area B), and the adjacent second pixel electrodes The orthographic projection of the region between 11 and the second common electrode 10 on the array substrate 1 coincides with the orthographic projection of the corresponding second sub-display region B on the array substrate 1 .

Based on the above arrangement, when forming the brightness control subunit, the second common electrode 10 and the second pixel electrode 11 can be multiplexed as the first control electrode. When a brightness control subunit is provided, the second pixel electrode 11 or the second common electrode 10 corresponding to the first subdisplay area A can be multiplexed as the first subunit of the brightness control subunit corresponding to the first subdisplay area A. A control electrode, so that when forming the brightness control subunit, only the second control electrode 4 and the microcapsule polymer layer 5 included in the brightness control subunit need to be formed, which simplifies the preparation process of the brightness control subunit.

When the second common electrode 10 and the second pixel electrode 11 are multiplexed as the first control electrode, the specific driving method for the brightness control subunit is as follows:

In the bright state display preparation period, the first control signal is applied to the second common electrode 10 and the second pixel electrode 11, and the second control signal is applied to the second control electrode 4, so that the black color in the microcapsule polymer layer 5 is The charged particles 6 and the white charged particles 7 move so that the white charged particles 7 are closer to the display side of the blue phase liquid crystal display panel 17 relative to the black charged particles 6, and then the first and second control signals are turned off.

During the bright-state display period, a first AC signal for enabling the blue-phase liquid crystal display device to achieve normal bright-state display is applied to the second pixel electrode 11 , and a corresponding DC signal is applied to the second common electrode 10 .

In the dark state display preparation period, the third control signal is applied to the second common electrode 10 and the second pixel electrode 11, and the fourth control signal is applied to the second control electrode 4, so that the black color in the microcapsule polymer layer 5 is applied. The charged particles 6 and the white charged particles 7 move to keep the white charged particles 7 away from the display side of the blue phase liquid crystal display panel 17 relative to the black charged particles 6, and then the third and fourth control signals are turned off.

During the dark state display period, a second AC signal for enabling the blue phase liquid crystal display device to achieve normal dark state display is applied to the second pixel electrode 11 , and a corresponding DC signal is applied to the second common electrode 10 .

Embodiments of the present invention further provide a blue-phase liquid crystal display device, including the blue-phase liquid crystal display panel 17 provided in the above-mentioned embodiments.

Since the brightness control unit included in the blue-phase liquid crystal display panel provided by the above-mentioned embodiments can display the bright state when the first display area displays the bright state, the brightness control unit can improve the display brightness of the first display area to a certain extent. Therefore, the blue-phase liquid crystal display device provided by the embodiment of the present invention can well avoid the overall transparency of the blue-phase liquid crystal display device during bright state display due to the small horizontal electric field component above the electrodes and the low liquid crystal light efficiency. The over-rate is low, which affects the quality of the displayed picture.

An embodiment of the present invention also provides a driving method for a blue-phase liquid crystal display device, which is applied to the blue-phase liquid crystal display device provided by the above-mentioned embodiments. The driving method includes: applying a control signal to the brightness control unit, so that the brightness control unit is in The first display area displays the bright state when the bright state is displayed.

It should be noted that the orthographic projection of the brightness control unit on the array substrate 1 at least partially overlaps with the orthographic projection of the first display area on the array substrate 1. Preferably, the orthographic projection of the brightness control unit on the array substrate 1 overlaps with The orthographic projections of the first display area on the array substrate 1 are coincident.

When driving the blue-phase liquid crystal display device, in the case that the first display area included in the blue-phase liquid crystal display panel 17 is to display a bright state, a control signal is applied to the brightness control unit, so that the brightness control unit generates a control electric field, and the brightness control unit generates a control electric field. Under the control of the control electric field, the brightness control unit displays a bright state, thereby improving the display brightness of the first display area.

When the blue-phase liquid crystal display device provided in the above-mentioned embodiment is driven by the driving method of the blue-phase liquid crystal display device provided by the embodiment of the present invention, when the first display area displays the bright state, the brightness control unit can be controlled to display the bright state, so that the brightness control unit can be controlled to display the bright state. The unit plays a role in improving the display brightness of the first display area. Therefore, when the blue-phase liquid crystal display device is driven by the driving method provided in the embodiment of the present invention, the light effect of the liquid crystal is well avoided due to the small horizontal electric field component above the electrodes. It is very low, which leads to a problem that the overall transmittance of the blue-phase liquid crystal display device is low when it is displayed in a bright state, which affects the quality of the display image.

The driving method provided by the above embodiment further includes: applying a control signal to the brightness control unit, so that the brightness control unit displays a dark state when the first display area displays a dark state.

Specifically, due to the actual display of the blue-phase liquid crystal display device, there may be a dark state display according to the actual display needs. When the blue-phase liquid crystal display device performs dark state display, the corresponding first display area will be darkened. In order to avoid the influence of the brightness control unit on the dark state display effect of the first display area, when the first display area wants to display the dark state, it can be set under the action of the control signal, and the brightness control unit can display the dark state, In this way, the display brightness of the first display area is reduced.

Therefore, when the blue-phase liquid crystal display device provided in the above-mentioned embodiment is driven by the driving method of the blue-phase liquid crystal display device provided by the embodiment of the present invention, the brightness control unit can be controlled to display the bright state when the first display area displays the bright state, and the brightness control unit can be controlled to display the bright state when the first display area displays the bright state. When a display area displays a dark state, a dark state is displayed, so that the brightness control unit can adjust the light effect of the first display area correspondingly according to the actual display needs of the first display area, so that the blue-phase liquid crystal display device can be displayed in different display states. Under all conditions, a good display effect can be achieved.

As shown in FIG. 4 , FIG. 6 and FIG. 8 , when the above-mentioned first display area includes at least one first sub-display area A, the brightness control unit includes at least one brightness control unit corresponding to the at least one first sub-display area A one-to-one unit, the brightness control sub-unit includes a first control electrode and a second control electrode 4 arranged oppositely, and a microcapsule polymer layer 5 arranged between the first control electrode and the second control electrode 4; the microcapsule polymer layer 5 includes black charged particles 6 and white charged particles 7 of opposite polarities.

In the above driving method, the step of applying a control signal to the brightness control unit specifically includes:

When the corresponding first sub-display area A displays the bright state, in the bright state display preparation period, the first control signal is applied to the first control electrode, and the second control signal is applied to the second control electrode 4, so that the first control signal is applied to the first control electrode 4. A first control electric field is generated between the control electrode and the second control electrode 4, and the first control electric field controls the movement of the black charged particles 6 and the white charged particles 7 in the microcapsule polymer layer 5, so that the white charged particles 7 are charged relative to the black ones The particles 6 are close to the display side of the blue-phase liquid crystal display device.

When the corresponding first sub-display area A displays a dark state, in the dark state display preparation period, the third control signal is applied to the first control electrode, and the fourth control signal is applied to the second control electrode 4, so that the first control signal is applied to the first control electrode 4. A second control electric field is generated between the control electrode and the second control electrode 4, and the second control electric field controls the movement of the black charged particles 6 and the white charged particles 7 in the microcapsule polymer layer 5, so that the white charged particles 7 are charged relative to the black ones The particles 6 are far away from the display side of the blue-phase liquid crystal display device.

In more detail, when the first display area is to display the bright state, in the bright state display preparation period, referring to FIGS. 6-8 , the first control signal is first applied to the first control electrode, and the second control electrode 4 A second control signal is applied so that the first control electric field generated between the first control electrode and the second control electrode 4 can control the white charged particles 7 in the microcapsule polymer layer 5 to approach the blue phase liquid crystal relative to the black charged particles 6 On the display side of the display device, the display brightness of the first display area is increased, and then the first control signal applied to the first control electrode and the second control signal applied to the second control electrode 4 are turned off.

When the first display area is to display the dark state, in the dark state display preparation period, as shown in FIG. 4 and FIG. The control signal enables the second control electric field generated between the first control electrode and the second control electrode 4 to control the distance of the white charged particles 7 in the microcapsule polymer layer 5 from the blue phase liquid crystal display device relative to the black charged particles 6. On the display side, the display darkness of the first display area is reduced, and then the third control signal applied to the first control electrode and the fourth control signal applied to the second control electrode 4 are turned off.

When the array substrate 1 is provided with an entire layer of the first common electrode 8, and at least one strip-shaped first pixel electrode 9 is provided on the first common electrode 8, the first common electrode 8 and at least one strip-shaped first pixel electrode 9 are provided on the array substrate 1. When a driving electric field for driving the deflection of the blue-phase liquid crystal 3 is generated between a pixel electrode 9, the first pixel electrode 9 can be multiplexed as a first control electrode.

When the first pixel electrode 9 is multiplexed as the first control electrode, in the bright-state display preparation period, as shown in FIG. 8 , the first control signal is applied to the multiplexed first pixel electrode 9 and the second control electrode 4 The second control signal to move the black charged particles 6 and the white charged particles 7 in the microcapsule polymer layer 5 so that the white charged particles 7 are brought closer to the display side of the blue phase liquid crystal display panel 17 relative to the black charged particles 6, and then turned off a first control signal and a second control signal. It is worth noting that both the applied first control signal and the second control signal are DC signals. During the dark state display preparation period, a third control signal is applied to the multiplexed first pixel electrode 9 and a fourth control signal is applied to the second control electrode 4 to make the black charged particles 6 in the microcapsule polymer layer 5 Move with the white charged particles 7 to keep the white charged particles 7 away from the display side of the blue phase liquid crystal display panel 17 relative to the black charged particles 6, and then turn off the third control signal and the fourth control signal. It is worth noting that the applied third control signal and the fourth control signal are both DC signals.

The driving method of the blue-phase liquid crystal display device provided by the above embodiment further includes:

During the bright-state display period, a first AC signal is applied to the multiplexed first pixel electrode 9 , and a corresponding DC signal is applied to the first common electrode 8 , so that between the first pixel electrode 9 and the first common electrode 8 A corresponding driving electric field is generated, so that the blue-phase liquid crystal display device realizes bright-state display.

During the dark state display period, a second AC signal is applied to the multiplexed first pixel electrode 9 , and a corresponding DC signal is applied to the first common electrode 8 , so that between the first pixel electrode 9 and the first common electrode 8 The corresponding driving electric field is generated, so that the blue-phase liquid crystal display device realizes dark state display.

As shown in FIG. 4 and FIG. 6 , when the array substrate 1 is provided with at least one second common electrode 10 in stripe structure and at least one second pixel electrode 11 in stripe structure, at least one second common electrode 10 and at least one second common electrode 10 The pixel electrodes 11 are arranged alternately, and there is a distance between the adjacent second common electrodes 10 and the second pixel electrodes 11, and the adjacent second common electrodes 10 and the second pixel electrodes 11 are used to drive the blue phase liquid crystal 3. When the driving electric field is deflected, the second common electrode 10 and the second pixel electrode 11 can be multiplexed as the first control electrode.

When the second common electrode 10 and the second pixel electrode 11 are multiplexed as the first control electrode, in the bright state display preparation period, see FIG. 6 and FIG. 7 , when the multiplexed second common electrode 10 and the multiplexed second The first control signal is applied to the pixel electrode 11, and the second control signal is applied to the second control electrode 4, so that the black charged particles 6 and the white charged particles 7 in the microcapsule polymer layer 5 move, so that the white charged particles 7 are opposite to each other. When the black charged particles 6 are close to the display side of the blue-phase liquid crystal display panel 17, the first control signal and the second control signal are turned off. In the dark state display preparation period, referring to FIG. 4 and FIG. 5 , the third control signal is applied to the multiplexed second common electrode 10 and the multiplexed second pixel electrode 11 , and the fourth control signal is applied to the second control electrode 4 signal to move the black charged particles 6 and the white charged particles 7 in the microcapsule polymer layer 5 so that the white charged particles 7 are far from the display side of the blue phase liquid crystal display panel 17 relative to the black charged particles 6, and then the third control is turned off signal and a fourth control signal.

The driving method of the blue-phase liquid crystal display device provided by the above embodiment further includes:

During the bright state display period, the first AC signal is applied to the multiplexed second pixel electrode 11, and the corresponding DC signal is applied to the multiplexed second common electrode 10, so that the second pixel electrode 11 and the second common electrode are A corresponding driving electric field is generated between 10, so that the blue phase liquid crystal display device realizes bright state display.

In the dark state display period, a second AC signal is applied to the multiplexed second pixel electrode 11, and a corresponding DC signal is applied to the multiplexed second common electrode 10, so that the second pixel electrode 11 and the second common electrode are A corresponding driving electric field is generated between 10, so that the blue-phase liquid crystal display device realizes dark state display.

Embodiments of the present invention also provide a method for preparing a blue-phase liquid crystal display panel, which is used for preparing the blue-phase liquid crystal display panel provided in the above-mentioned embodiments (see FIG. 4 , FIG. 6 and FIG. 8 ). The preparation method includes:

Step 101 , providing an array substrate 1 and a color filter substrate 2 .

Step 102, a brightness control unit is formed between the array substrate 1 and the color filter substrate 2, the orthographic projection of the brightness control unit on the array substrate 1 at least partially overlaps with the orthographic projection of the first display area on the array substrate 1, and the brightness is controlled. The unit is used to display the bright state when the first display area displays the bright state.

Specifically, in the above step 101, the provided array substrate 1 is formed by providing a base substrate, and sequentially forming a gate layer, a gate insulating layer, a semiconductor material layer, and a source-drain metal layer on the base substrate. and a passivation layer (not shown in the figure), and then a common electrode and a pixel electrode are formed on the passivation layer. The provided color filter substrate 2 is formed by providing a base substrate on which a black matrix 15, color patterns 14 (generally including red patterns, green patterns and blue patterns) and a flat layer 16 are formed.

In the above step 102, when forming the brightness control unit, the brightness control unit may be formed on the array substrate 1, or formed on the color filter substrate 2, or a part of the brightness control unit may be formed on the array substrate 1, and another part of the brightness control unit may be formed on the array substrate 1. It is formed on the color filter substrate 2, so that after the array substrate 1 and the color filter substrate 2 are boxed together, the orthographic projection of the brightness control unit on the array substrate 1 and the orthographic projection of the first display area on the array substrate 1 are at least partially Overlapping, preferably, the orthographic projection of the brightness control unit on the array substrate 1 coincides with the orthographic projection of the first display area on the array substrate 1 .

The blue-phase liquid crystal display panel prepared by using the blue-phase liquid crystal display panel preparation method provided by the embodiment of the present invention includes a brightness control unit disposed between the array substrate 1 and the color filter substrate 2, and the brightness control unit is located on the array substrate. The orthographic projection on 1 and the orthographic projection of the first display area on the array substrate 1 at least partially overlap, because the brightness control unit can display the bright state when the first display area displays the bright state, so that the brightness control unit has no effect on the first display area. Therefore, when the blue-phase liquid crystal display panel prepared by the preparation method provided by the embodiment of the present invention is applied in the blue-phase liquid crystal display device, the horizontal electric field above the electrodes is well avoided. The component is very small, and the light efficiency of the liquid crystal is very low, which leads to a problem that the overall transmittance of the blue-phase liquid crystal display device is low when it is displayed in a bright state, which affects the quality of the display image.

The brightness control unit included in the blue-phase liquid crystal display panel prepared by the preparation method provided in the above embodiment is also used to display the dark state when the first display area displays the dark state, so that the brightness control unit not only avoids The dark state display effect is affected, and the display brightness of the first display area can be further reduced, so that the first display area can achieve a better dark state display effect.

The above-mentioned first display area includes at least one first sub-display area A, the brightness control unit includes at least one brightness control sub-unit corresponding to the at least one first sub-display area A one-to-one, and the brightness control sub-unit includes a relatively set first sub-unit. The control electrode and the second control electrode 4, and the microcapsule polymer layer 5 arranged between the first control electrode and the second control electrode 4, the microcapsule polymer layer 5 includes black charged particles 6 of opposite polarities and white Charged Particles 7.

When the array substrate 1 is provided with an entire layer of the first common electrode 8, and at least one strip-shaped first pixel electrode 9 is provided on the first common electrode 8, the first common electrode 8 and at least one strip-shaped first pixel electrode 9 are provided on the array substrate 1. When a driving electric field is generated between a pixel electrode 9, in the above step 102, the step of forming a brightness control unit between the array substrate 1 and the color filter substrate 2 specifically includes:

Step 10211 , forming the second control electrode 4 on the color filter substrate 2 .

Step 10212 , forming the microcapsule polymer layer 5 on the second control electrode 4 .

Step 10213, multiplexing the first pixel electrode 9 into a first control electrode.

When the array substrate 1 is provided with at least one second common electrode 10 in stripe structure and at least one second pixel electrode 11 in stripe structure, at least one second common electrode 10 and at least one second pixel electrode 11 are alternately arranged, and There is a distance between the adjacent second common electrodes 10 and the second pixel electrodes 11, and when a driving electric field is generated between the adjacent second common electrodes 10 and the second pixel electrodes 11, in the above step 102, the array substrate 1 and the second pixel electrode 11 are separated. The steps of forming the brightness control unit between the color filter substrates 2 specifically include:

Step 10221 , forming the second control electrode 4 on the color filter substrate 2 .

Step 10222 , forming a microcapsule polymer layer 5 on the second control electrode 4 .

Step 10223, multiplexing the second common electrode 10 and the second pixel electrode 11 into a first control electrode.

In the above steps 10211 and 10221, the step of forming the second control electrode 4 on the color filter substrate 2 specifically includes: firstly forming a second control electrode film on the color filter substrate 2, and then patterning the second control electrode film, to form the second control electrode 4 .

In the above steps 10212 and 10222, the step of forming the microcapsule polymer layer 5 on the second control electrode 4 specifically includes: mixing the white charged particles 7, black charged particles 6 and polymer monomers to prepare a mixed solution; using The prepared mixed solution adopts a coating process to form a microcapsule polymer film covering the color filter substrate; pattern the microcapsule polymer film to form a microcapsule polymer layer 5 on the second control electrode 4 . It is worth noting that the formed microcapsule polymer film covering the color filter substrate specifically covers the second control electrode 4 and the flat layer 16 on the color filter substrate.

In order to better illustrate the preparation process of the blue-phase liquid crystal display panel provided by the above embodiments, two specific embodiments are given below to describe the preparation process of the blue-phase liquid crystal display panel in detail.

When a whole layer of the first common electrode 8 is formed on the array substrate 1, and a plurality of first pixel electrodes 9 are formed on the first common electrode 8, the preparation process of the blue phase liquid crystal display panel specifically includes:

In step 201, a base substrate is provided, and a gate layer, a gate insulating layer, a semiconductor layer, a source-drain metal layer and a passivation layer are sequentially formed on the base substrate to form an array substrate 1, and then a gate layer, a gate insulating layer, a semiconductor layer, a source-drain metal layer and a passivation layer are formed on the base substrate A whole-layer first common electrode 8 is formed on the passivation layer, and a plurality of first pixel electrodes 9 with a rectangular cross-section strip structure are formed on the first common electrode 8, and the cross-sectional width of the first pixel electrode 9 is 2.8um , the height is 1.8um, and the spacing between adjacent first pixel electrodes 9 is 4.5um.

Step 202 , providing a base substrate, and forming the black matrix 15 , the color graphics 14 (including the red graphics, the green graphics and the blue graphics) and the flat layer 16 on the base substrate to form the color filter substrate 2 .

Step 203 , a plurality of second control electrodes 4 are formed on the flat layer 16 of the color filter substrate 2 , and the plurality of second control electrodes 4 are in one-to-one correspondence with a plurality of first pixel electrodes 9 , and the array substrate 1 and the color filter substrate 2 are aligned. After the box, the orthographic projection of the second control electrode 4 on the array substrate 1 coincides with the orthographic projection of the corresponding first pixel electrode 9 on the array substrate 1 .

Step 204, mixing white titanium dioxide particles, black carbon black particles and polymer monomers to form a mixed solution, and using the mixed solution, a coating process is adopted; The microcapsule polymer layer 5 on the second control electrode 4, the thickness of the microcapsule polymer layer 5 is 1.2um.

Step 205 , under light-shielding conditions, evenly coat the frame sealant on the packaging area of the color filter substrate 2 on which the microcapsule polymer layer 5 is formed.

Step 206 , drop the blue phase liquid crystal 3 on the array substrate 1 on which the first pixel electrodes 9 are formed.

In step 207, the array substrate 1 on which the blue phase liquid crystal 3 is dropped and the color filter substrate 2 coated with the frame sealant are assembled, and the blue phase liquid crystal display panel 17 is formed after ultraviolet polymerization and thermal polymerization.

When forming a plurality of second common electrodes 10 in a stripe structure and a plurality of second pixel electrodes 11 in a stripe structure on the array substrate 1, the preparation process of the blue phase liquid crystal display panel specifically includes:

In step 301, a base substrate is provided, and a gate layer, a gate insulating layer, a semiconductor layer, a source-drain metal layer and a passivation layer are sequentially formed on the base substrate to form an array substrate 1, and then the array substrate 1 is formed on the On the passivation layer, a plurality of second common electrodes 10 having a rectangular stripe structure and a plurality of second pixel electrodes 11 having a rectangular stripe structure are formed, and the second common electrodes 10 and the second pixel electrodes 11 are arranged at intervals, Set the cross-sectional width of the second common electrode 10 and the second pixel electrode 11 to 3um, the height of the second common electrode 10 and the second pixel electrode 11 to 1.5um, and the adjacent second common electrode 10 and the second pixel electrode 11. The spacing between them is 5um.

Step 302 , providing a base substrate on which the black matrix 15 , the color graphics 14 (including the red graphics, the green graphics and the blue graphics) and the flat layer 16 are formed to form the color filter substrate 2 .

In step 303, a plurality of second control electrodes 4 are formed on the flat layer 16 of the color filter substrate 2. After the array substrate 1 and the color filter substrate 2 are assembled, the orthographic projection of the second control electrodes 4 on the array substrate 1 corresponds to The orthographic projection of the second common electrode 10 on the array substrate 1 coincides with the orthographic projection of the corresponding second pixel electrode 11 on the array substrate 1 .

Step 304, mix the white titanium dioxide particles, black carbon black particles and polymer monomers to form a mixed solution, and use the mixed solution to apply a coating process; use a mask to pattern the microcapsule polymer film to form a The microcapsule polymer layer 5 on the two control electrodes 4, the thickness of the microcapsule polymer layer 5 is 1.8um.

Step 305 , under light-shielding conditions, evenly coat the frame sealant on the packaging area of the color filter substrate 2 on which the microcapsule polymer layer 5 is formed.

Step 306 , drop the blue phase liquid crystal 3 on the array substrate 1 on which the first pixel electrodes 9 are formed.

In step 307, the array substrate 1 on which the blue phase liquid crystal 3 is dropped and the color filter substrate 2 coated with the frame sealant are assembled, and the blue phase liquid crystal display panel 17 is formed after ultraviolet polymerization and thermal polymerization.

It should be noted that, in the above steps 201 and 301, the cross-sections of the first pixel electrode 9, the second common electrode 10 and the second pixel electrode 11 in the stripe-shaped structure can also be optionally elliptical or trapezoidal. The height of the pixel electrode 9, the second common electrode 10 and the second pixel electrode 11 can be selected between 0.1um-4um; the cross-sectional width of the first pixel electrode 9, the second common electrode 10 and the second pixel electrode 11, adjacent The spacing between the first pixel electrodes 9 and the spacing between the adjacent second common electrodes 10 and the second pixel electrodes 11 can also be set according to actual needs, for example: the cross-sectional width is set to 2.6um, and the distance between the electrodes The spacing between them is set to 4.7um, etc.

In the above steps 204 and 304, the white titanium dioxide particles and the black carbon black particles can be modified first, and then the modified particles are used to form the microcapsule polymer layer 5, so that the modified white titanium dioxide particles and black carbon black particles are more It is easy to move relatively, and the distribution is more uniform.

In the above steps 205 and 305, the frame sealing glue selected can be SWB-73, SWB-66 or SWB-73.

In the above step 206 and step 306, the drop-in blue phase liquid crystal 3 can be selected from BL-038, JC-BP06 or JC-BP08.

In the foregoing description of the embodiments, the particular features, structures, materials or characteristics may be combined in any suitable manner in any one or more of the embodiments or examples.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (13)

1. A blue phase liquid crystal display panel comprises an array substrate, a color film substrate and blue phase liquid crystals, wherein the array substrate and the color film substrate are oppositely arranged, the blue phase liquid crystal display panel also comprises a common electrode and a pixel electrode which are arranged on the array substrate, the blue phase liquid crystal display panel also comprises a first display area and a second display area, a horizontal electric field component of a driving electric field for driving the blue phase liquid crystals to deflect in the first display area is smaller than a horizontal electric field component of the driving electric field in the second display area, and the direction of the horizontal electric field component is parallel to the array substrate; it is characterized in that the preparation method is characterized in that,

the blue phase liquid crystal display panel further includes: the brightness control unit is arranged between the array substrate and the color film substrate, and the orthographic projection of the brightness control unit on the array substrate is at least partially overlapped with the orthographic projection of the first display area on the array substrate;

the brightness control unit is used for displaying a bright state when the first display area displays the bright state.

2. The blue phase liquid crystal display panel according to claim 1, wherein the luminance controlling unit is further configured to display a dark state when the first display region displays the dark state.

3. The blue phase liquid crystal display panel according to claim 1 or 2, wherein an orthographic projection of the brightness control unit on the array substrate coincides with an orthographic projection of the first display region on the array substrate.

4. The blue phase liquid crystal display panel according to claim 3,

the first display region includes at least one first sub-display region,

the brightness control unit comprises at least one brightness control subunit which is in one-to-one correspondence with the at least one first sub-display area, wherein the brightness control subunit comprises a first control electrode and a second control electrode which are oppositely arranged, and a microcapsule polymer layer arranged between the first control electrode and the second control electrode; wherein,

the microcapsule polymer layer comprises black charged particles and white charged particles with opposite polarities;

a control electric field is generated between the first control electrode and the second control electrode, and the control electric field is used for controlling the black charged particles and the white charged particles in the microcapsule polymer layer to move, so that when the corresponding first sub-display area displays a bright state, the white charged particles are close to the display side of the blue phase liquid crystal display panel relative to the black charged particles, and when the corresponding first sub-display area displays a dark state, the white charged particles are far away from the display side of the blue phase liquid crystal display panel relative to the black charged particles.

5. The blue phase liquid crystal display panel according to claim 4,

the array substrate is provided with a whole layer of first common electrodes, the first common electrodes are provided with at least one first pixel electrode with a strip-shaped structure, and the driving electric field is generated between the first common electrodes and the first pixel electrodes with the at least one strip-shaped structure;

the first pixel electrode is multiplexed as the first control electrode.

6. The blue phase liquid crystal display panel according to claim 4,

at least one second common electrode of a strip-shaped structure and at least one second pixel electrode of the strip-shaped structure are arranged on the array substrate, the at least one second common electrode and the at least one second pixel electrode are alternately arranged, a space is reserved between the adjacent second common electrodes and the adjacent second pixel electrodes, and the driving electric field is generated between the adjacent second common electrodes and the adjacent second pixel electrodes;

the second common electrode and the second pixel electrode are multiplexed as the first control electrode.

7. A blue phase liquid crystal display device comprising the blue phase liquid crystal display panel according to any one of claims 1 to 6.

8. A driving method of a blue phase liquid crystal display device, applied to the blue phase liquid crystal display device according to claim 7, the driving method comprising:

and applying a control signal on the brightness control unit to enable the brightness control unit to display a bright state when the first display area displays the bright state.

9. The method of driving the blue phase liquid crystal display device according to claim 8, further comprising:

and applying a control signal on the brightness control unit to enable the brightness control unit to display a dark state when the first display area displays the dark state.

10. The method for driving a blue phase liquid crystal display device according to claim 9,

the first display area comprises at least one first sub-display area, the brightness control unit comprises at least one brightness control subunit corresponding to the at least one first sub-display area one by one, the brightness control subunit comprises a first control electrode and a second control electrode which are oppositely arranged, and a microcapsule polymer layer arranged between the first control electrode and the second control electrode; the microcapsule polymer layer comprises black charged particles and white charged particles with opposite polarities;

the applying of the control signal to the brightness control unit specifically includes:

when the corresponding first sub-display area displays a bright state, applying a first control signal on the first control electrode and applying a second control signal on the second control electrode in a bright state display preparation period, so that a first control electric field is generated between the first control electrode and the second control electrode, and the first control electric field controls the black charged particles and the white charged particles in the microcapsule polymer layer to move so that the white charged particles are close to the display side of the blue phase liquid crystal display device relative to the black charged particles;

when the corresponding first sub-display area displays a dark state, in a dark state display preparation period, applying a third control signal to the first control electrode and applying a fourth control signal to the second control electrode so as to generate a second control electric field between the first control electrode and the second control electrode, wherein the second control electric field controls the black charged particles and the white charged particles in the microcapsule polymer layer to move so as to enable the white charged particles to be far away from the display side of the blue phase liquid crystal display device relative to the black charged particles.

11. A method for manufacturing a blue phase liquid crystal display panel, which is used for manufacturing the blue phase liquid crystal display panel according to any one of claims 1 to 6, the method comprising:

providing an array substrate and a color film substrate; the array substrate is provided with a common electrode and a pixel electrode;

and forming a brightness control unit between the array substrate and the color film substrate, wherein the orthographic projection of the brightness control unit on the array substrate is at least partially overlapped with the orthographic projection of the first display area on the array substrate, and the brightness control unit is used for displaying a bright state when the first display area displays the bright state.

12. The method of manufacturing a blue phase liquid crystal display panel according to claim 11,

the first display area comprises at least one first sub-display area, the brightness control unit comprises at least one brightness control subunit corresponding to the at least one first sub-display area one by one, the brightness control subunit comprises a first control electrode and a second control electrode which are oppositely arranged, and a microcapsule polymer layer arranged between the first control electrode and the second control electrode; the microcapsule polymer layer comprises black charged particles and white charged particles with opposite polarities; the array substrate is provided with a whole layer of first common electrodes, the first common electrodes are provided with at least one first pixel electrode with a strip-shaped structure, and the driving electric field is generated between the first common electrodes and the first pixel electrodes with the at least one strip-shaped structure;

the forming of the brightness control unit between the array substrate and the color film substrate includes:

forming a second control electrode on the color film substrate;

forming a microcapsule polymer layer on the second control electrode;

the first pixel electrode is multiplexed as the first control electrode.

13. The method of manufacturing a blue phase liquid crystal display panel according to claim 12, wherein the forming of the microcapsule polymer layer on the second control electrode comprises:

mixing white charged particles, black charged particles and a polymer monomer to prepare a mixed solution;

forming a microcapsule polymer film covering the color film substrate by using the mixed solution and a coating process;

patterning said microcapsule polymer film to form a microcapsule polymer layer on said second control electrode.

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