KR20100080032A - Multi view display device - Google Patents

Abstract

The multi-view display of the present invention is to control the front and side luminance by differently designing the sub-pixel size and thus the opening area transmitted to the front or side according to the purpose of use, the color filter substrate and the array substrate A liquid crystal display panel configured to display an image; A backlight unit radiating backlight light onto the liquid crystal display panel; And an image installed between the color filter substrate and the array substrate to display different images according to the viewing direction of the user, and the sub-pixel size and the opening area transmitted to the front or side according to the purpose of use are designed differently. A parallax barrier that controls the brightness.

Description

Multi view display {MULTI VIEW DISPLAY DEVICE}

The present invention relates to a multi-view display, and more particularly to a multi-view display for displaying two or more images so that each image can be viewed in a different direction.

Recently, with increasing interest in information display and increasing demand for using a portable information carrier, a lightweight flat panel display (FPD), which replaces a conventional display device, a cathode ray tube (CRT), is used. The research and commercialization of Korea is focused on. In particular, the liquid crystal display (LCD) of the flat panel display device is an image representing the image using the optical anisotropy of the liquid crystal, is excellent in resolution, color display and image quality, and is actively applied to notebooks or desktop monitors have.

The liquid crystal display is largely composed of a color filter substrate and an array substrate, and a liquid crystal layer formed between the color filter substrate and the array substrate.

The active matrix (AM) method, which is a driving method mainly used in the liquid crystal display device, uses an amorphous silicon thin film transistor (a-Si TFT) as a switching device to drive the liquid crystal in the pixel portion. to be.

Hereinafter, a structure of a general liquid crystal display device will be described in detail with reference to FIG. 1.

1 is an exploded perspective view schematically illustrating a general liquid crystal display.

As shown in the figure, the liquid crystal display device is largely a liquid crystal layer (liquid crystal layer) formed between the color filter substrate 5 and the array substrate 10 and the color filter substrate 5 and the array substrate 10 ( 30).

The color filter substrate 5 includes a color filter C composed of a plurality of sub-color filters 7 for implementing colors of red (R), green (G), and blue (B); A black matrix 6 that separates the sub-color filters 7 and blocks light passing through the liquid crystal layer 30, and a transparent common electrode that applies a voltage to the liquid crystal layer 30. 8)

In addition, the array substrate 10 may be arranged vertically and horizontally to define a plurality of gate lines 16 and data lines 17 and a plurality of gate lines 16 and data lines 17 that define a plurality of pixel regions P. The thin film transistor T, which is a switching element formed in the cross region, and the pixel electrode 18 formed on the pixel region P, are formed.

The color filter substrate 5 and the array substrate 10 configured as described above are joined to face each other by sealants (not shown) formed on the outer side of the image display area to form a liquid crystal display panel. The bonding of the 5 and the array substrate 10 is made through a bonding key (not shown) formed on the color filter substrate 5 or the array substrate 10.

The liquid crystal display device or the plasma display panel (PDP) has been designed to be viewed simultaneously by multiple users as a two-dimensional display device. The display characteristics of such a display device are made such that a viewer can view the same high quality image from different angles with respect to the display device.

However, there are many cases where it is required for each user to see different information from the same display device. For example, in a car the driver may want to see satellite navigation data while the passenger may want to watch a movie. As another example, each player in a two or more computer game wants to see the game from his own perspective.

These conflicting requirements can be met by providing two separate displays, but this will take up excessive space and increase costs.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a multi-view display that displays two or more images so that each image can be viewed in a different direction.

Another object of the present invention is to provide a multi-view display in which image quality deterioration and luminance deterioration occur due to undesired reflection due to the use of parallax barriers.

Another object of the present invention is to provide a multi-view display that controls the front and side brightness by differently designing the opening area transmitted to the front or side according to the purpose of use.

Other objects and features of the present invention will be described in the configuration and claims of the invention described below.

In order to achieve the above object, the multi-view display of the present invention comprises a liquid crystal display panel consisting of a color filter substrate and an array substrate to display an image; A backlight unit radiating backlight light onto the liquid crystal display panel; And an image installed between the color filter substrate and the array substrate to display different images according to the viewing direction of the user, and the sub-pixel size and the opening area transmitted to the front or side according to the purpose of use are designed differently. A parallax barrier that controls the brightness.

As described above, the multi-view display according to the present invention can be adjusted to the brightness of the display by differently designing the opening area transmitted to the front and side according to the purpose of use of the public (public) can meet the various needs of the user Provide effect.

Hereinafter, exemplary embodiments of a multi-view display according to the present invention will be described in detail with reference to the accompanying drawings.

2 is an exemplary diagram schematically showing a multi-view display in which each image can be viewed in three different directions.

3 is an exemplary diagram schematically illustrating the concept of a multi-view display.

As shown in FIG. 2, the multi-view display 10 is a technology for displaying two or three different images on one display panel in a way of controlling the viewing angle. (C) is a viewing angle controlled display capable of displaying different images.

The drawing shows a triple view display 10 for viewing different images when the panel is viewed from the front (A), when viewed from the left 50-degree tilt (B), and when viewed from the right 50-degree tilt (C). For example, it is shown.

Since the triple view display 10 simultaneously displays three types of images, the number of pixels in each direction is one third of the total number of pixels, and a dual view display capable of displaying different images in two different left and right directions. This can be achieved by improving the technology and parallax barrier technology.

As described above, the multi-view display is a display capable of simultaneously providing different images according to the viewing direction using a single liquid crystal display panel. As shown in FIG. 3, the multi-view display is incident from the backlight using the parallax barrier 20. The light is divided into three optical paths of the center (C), left (L), and right (R) pixels 7 to display three different images simultaneously.

Accordingly, it is possible to watch TV in the center (C), and to play games or surf the Internet on the left (L) or right (R).

The basis of this technology is a 3D liquid crystal display technology, and the 3D liquid crystal display technology installs a slit partially blocking the light on the front of a general liquid crystal display panel so that the right eye and the left eye can show different images. This is a technology that makes one image appear three-dimensional. At this time, the slit to be installed corresponds to the parallax barrier.

Here, although the parallax barrier applied in the 3D liquid crystal display device is used to realize the dual view or triple view display, the position of the parallax barrier is closer to the liquid crystal display panel so that the left and right images can be separated. By widening it is implemented.

As described above, in the 3D liquid crystal display, the image is separated at an angle of about 6 degrees with respect to the left and right eyes using a parallax barrier, but in the multi-view display, the separation angle is widened by 40 degrees or more, and the pixel arrangement is optimized. Multi-view can be realized.

As application fields of the multi-view display, a car navigation device capable of multi-screen display, an advertisement display, and the like can be considered. For example, in the case of a car navigation application, a navigation screen is provided to a driver to display road information to a destination, a passenger's companion is displayed to make a tourist information searchable, and a back seat enjoys a DVD movie image. Application is possible. In addition, in the advertisement display field, three different pieces of information may be displayed according to a moving direction of a pedestrian.

Such multi-view displays can show different images to more than one user, providing significant savings in space and cost compared to using more than one individual display.

4 is a schematic cross-sectional view of a multi-view display according to the present invention.

As shown in the figure, the multi-view display 100 according to the present invention includes a liquid crystal display panel constituting an image display device and a parallax converting means 102 including a parallax barrier 120.

In this case, the liquid crystal display panel is taken as an example of the image display device, but the present invention is not limited thereto.

The liquid crystal display panel is largely composed of a color filter substrate 105 and an array substrate 110 and a liquid crystal layer (not shown) formed between the color filter substrate 105 and the array substrate 110.

The color filter substrate 105 is disposed between the color filter 107 composed of a plurality of sub-color filters 107R, 107C, and 107L, which realizes red, green, and blue, and the sub-color filters 107R, 107C, and 107L. And a black matrix 106 for blocking light passing through the liquid crystal layer, and a transparent common electrode (not shown) for applying a voltage to the liquid crystal layer.

In this case, the sub-color filters 107R, 107C, and 107L according to the present invention are the first sub-color filter 107C for the front view and the second sub-color filter 107L for the left view and the right view. And a third sub-color filter 107R.

In addition, although not shown in detail in the drawing, the array substrate 110 is a thin film which is a switching element formed in a plurality of gate lines and data lines arranged vertically and horizontally to define a plurality of pixel regions, and intersecting regions of the gate lines and data lines. And a pixel electrode formed over the pixel region.

The color filter substrate 105 and the array substrate 110 configured as described above are joined to face each other by a sealant (not shown) formed on the outer side of the image display area to form a liquid crystal display panel. In this case, the color filter substrate 105 Linear polarizers 109 and 119 are attached to the outermost surface of the array substrate 110. The linear polarizers 109 and 119 serve to selectively transmit only light that vibrates strongly in a specific direction among the light transmitted through the liquid crystal, thereby assisting in performing an image display function imparted to the liquid crystal display panel. Do it.

In this case, the liquid crystal display panel is provided with a backlight unit for irradiating light to the liquid crystal display panel, wherein the backlight unit is disposed on the light guide plate 140 disposed on the rear surface of the liquid crystal display panel and the side surface of the light guide plate 140. Lamps 130, a reflecting plate (not shown) disposed on the rear surface of the light guide plate 140 and a plurality of optical sheets 145 positioned on the light guide plate 140 to scatter light to emit uniform light Is done.

In general, the lamp 130 applied to the backlight unit includes a cold cathode fluorescence lamp (CCFL) in the form of a tube having a length corresponding to a long side distance or a short side distance of a liquid crystal display panel. The cold cathode fluorescent lamp is applied to generate white light by power supplied through wires (not shown) at both ends.

In this case, the parallax converting means 102 according to the present invention includes a substrate 121, and the substrate 121 has a parallax barrier 120 arranged in an array form on a surface near the array substrate 110. . However, the present invention is not limited thereto, and the parallax barrier 120 may be arranged in an array form on a surface near the color filter substrate 105, and the parallax conversion may be performed between the array substrate 110 and the backlight unit. The means 102 may be arranged.

In this case, a predetermined adhesive material 122 is interposed between the parallax conversion means 102 including the parallax barriers 120 and the array substrate 110 to displace the parallax conversion means 102 from the array substrate 110. ) Will stick to the surface.

Here, the multi-view display according to the present invention can control the front and side brightness by differently designing the sub-pixel size and the opening area transmitted to the front or side according to the purpose of use, with reference to the drawings It explains in detail.

FIG. 5A is a rear view schematically illustrating some pixels of a multi-view display according to a first exemplary embodiment of the present invention. For convenience of description, FIG. 5A illustrates a sub-color filter corresponding to one sub-pixel.

5B is a view schematically showing a cross section taken along line A-A 'in the multi-view display according to the first embodiment of the present invention shown in FIG. 5A.

As shown in the figure, the multi-view display according to the first embodiment of the present invention includes a liquid crystal display panel (not shown) constituting an image display device and a parallax converting means including a parallax barrier 220.

In this case, as described above, the liquid crystal display panel is largely composed of a color filter substrate (not shown) and an array substrate (not shown) and a liquid crystal layer formed between the color filter substrate and the array substrate.

The color filter substrate distinguishes between the color filter 207 composed of a plurality of sub-color filters 207R, 207C, and 207L, which realizes red, green, and blue, and the sub-color filters 207R, 207C, and 207L. A black matrix blocking light passing through the liquid crystal layer and a transparent common electrode applying a voltage to the liquid crystal layer.

In this case, the sub-color filters 207R, 207C, and 207L according to the first embodiment of the present invention may have a first sub-color filter 207C for the front view and a second sub-for the left view and the right view. It consists of a color filter 207L and a third sub-color filter 207R.

The array substrate may include a plurality of gate lines and data lines arranged vertically and horizontally to define a plurality of pixel regions, a thin film transistor which is a switching element formed at an intersection of the gate lines and the data lines, and a pixel electrode formed on the pixel regions. consist of.

The color filter substrate and the array substrate configured as described above are bonded to face each other by sealants formed on the outer side of the image display area to form a liquid crystal display panel. In this case, the outermost surfaces of the color filter substrate and the array substrate are respectively linearly polarized plates (not shown). Is attached.

Here, in the multi-view display according to the first embodiment of the present invention, the size of the first sub-color filter 207C for the front view is the second for the left view and the right view in order to improve the side contrast. It is characterized by being smaller than the size of the sub-color filter 207L and the third sub-color filter 207R. In this case, for convenience of description, the sub-color filter will be described above, but the sub-color filter substantially means a sub-pixel corresponding thereto, and the multi-view according to the first embodiment of the present invention. The display is characterized in that the size of the first sub-pixel for the front view is smaller than the size of the second sub-pixel and the third sub-pixel for the left view and the right view to improve the front side contrast brightness. .

In addition, the opening area transmitted to the front surface is narrowly designed corresponding to the size of the first sub-color filter 207C, so that the luminance of the side surface is relatively improved compared to the front surface.

FIG. 6A is a rear view schematically illustrating some pixels of a multi-view display according to a second exemplary embodiment of the present invention, and for convenience of description, is shown based on a sub-color filter corresponding to one sub-pixel.

6B is a diagram schematically illustrating a cross section taken along line BB ′ in the multi-view display according to the second embodiment of the present invention illustrated in FIG. 6A.

As shown in the figure, the multi-view display according to the second embodiment of the present invention includes a liquid crystal display panel (not shown) constituting an image display device and a parallax converting means including a parallax barrier 320.

In this case, as described above, the liquid crystal display panel is largely composed of a color filter substrate (not shown) and an array substrate (not shown) and a liquid crystal layer formed between the color filter substrate and the array substrate.

The color filter substrate distinguishes between a color filter 307 composed of a plurality of sub-color filters 307R, 307C, and 307L that implements red, green, and blue and the sub-color filters 307R, 307C, and 307L. A black matrix blocking light passing through the liquid crystal layer and a transparent common electrode applying a voltage to the liquid crystal layer.

In this case, the sub-color filters 307R, 307C, and 307L according to the second embodiment of the present invention may include the first sub-color filter 307C for the front view and the second sub-color for the left and right views. It consists of a color filter 307L and a third sub-color filter 307R.

The array substrate may include a plurality of gate lines and data lines arranged vertically and horizontally to define a plurality of pixel regions, a thin film transistor which is a switching element formed at an intersection of the gate lines and the data lines, and a pixel electrode formed on the pixel regions. consist of.

The color filter substrate and the array substrate configured as described above are bonded to face each other by sealants formed on the outer side of the image display area to form a liquid crystal display panel. In this case, the outermost surfaces of the color filter substrate and the array substrate are respectively linearly polarized plates (not shown). Is attached.

Here, in the multi-view display according to the second embodiment of the present invention, the size of the first sub-color filter 307C for the front view is the second for the left view and the right view in order to improve the front-to-side brightness. It is characterized by being larger than the size of the sub-color filter 307L and the third sub-color filter 307R. That is, the multi-view display according to the second embodiment of the present invention has a size of the first sub-pixel for the front view and the second sub-pixel for the left view and the right view to improve the front-to-side brightness. And is designed to be larger than the size of the third sub-pixel.

In addition, the opening area transmitted to the front surface is largely designed to correspond to the size of the first sub-color filter 307C, so that the luminance of the front surface relative to the side surface is relatively improved.

As described above, the multi-view display according to the present invention can control the front and side brightness by differently designing the pixel size and the opening area transmitted to the front or side according to the purpose of use.

For example, referring to FIG. 7, the multi view display 100 according to the present invention may include a parallax barrier 120 having a stripe shape formed on a substrate.

In this case, the stripe type parallax barrier 120 is illustrated in the horizontal direction, for example, but the present invention is not limited thereto, and the parallax barrier 120 is disposed in the vertical stripe shape. Can be.

Here, when the width and the distance between the stripe pattern of the parallax barrier 120 is M and Q, respectively, when the front and side luminances are uniformly seen, the distance between the stripe pattern of the parallax barrier 120, That is, the width of the opening area of the parallax barrier 120 may be about 15%. That is, as the aperture ratio increases, the luminance increases, but it may be set to 15% in consideration of the overlapping area between views and the possibility of view inversion due to misalignment.

8A to 8D are graphs showing luminance characteristics according to the aperture ratio of a parallax barrier.

8A, 8B, 8C, and 8D show luminance characteristics according to viewing angles when the parallax barriers have aperture ratios of 12.5%, 15.0%, 17.5%, and 20.0%, respectively.

Referring to the drawings, it can be seen that in general, as the aperture ratio of the parallax barrier increases, the overall luminance increases, while as the aperture ratio of the parallax barrier decreases, the decrease in front luminance increases relatively, thereby improving the side luminance compared to the front surface. .

Although the present invention has been described using a liquid crystal display panel as an example of an image display device, the present invention is not limited thereto, and the present invention is not limited thereto. It can also be used in organic light emitting display devices to which organic light emitting diodes (OLEDs) are connected.

Many details are set forth in the foregoing description but should be construed as illustrative of preferred embodiments rather than to limit the scope of the invention. Therefore, the invention should not be defined by the described embodiments, but should be defined by the claims and their equivalents.

1 is an exploded perspective view schematically showing a general liquid crystal display device.

2 is an exemplary diagram schematically showing a multi-view display in which each image can be viewed in three different directions.

3 is an exemplary diagram schematically showing the concept of a multi-view display.

4 schematically shows a cross section of a multi-view display according to the invention;

5A is a rear view schematically showing some pixels of a multi-view display according to a first embodiment of the present invention;

FIG. 5B is a view schematically showing a cross section taken along a line A-A 'in the multi-view display according to the first embodiment of the present invention shown in FIG. 5A.

6A is a rear view schematically showing some pixels of a multi-view display according to a second embodiment of the present invention;

FIG. 6B schematically illustrates a cross section taken along line B-B 'in the multi-view display according to the second embodiment of the present invention shown in FIG. 6A.

7 is a plan view schematically illustrating the shape of a parallax barrier in the multi-view display shown in FIG. 4.

8A to 8D are graphs showing luminance characteristics according to the aperture ratio of a parallax barrier.

DESCRIPTION OF REFERENCE NUMERALS

100: multi view display 101 ~ 301: liquid crystal display panel

102 to 302: parallax conversion means 105 to 305: color filter substrate

106 ~ 306: Black matrix 107 ~ 307: Sub-color filter

110 to 310: array substrate 120 to 320: parallax barrier

121 ~ 321: Substrate 225,325: Opening area

Claims (9)

A liquid crystal display panel composed of a color filter substrate and an array substrate to display an image; A backlight unit radiating backlight light onto the liquid crystal display panel; And It is installed between the color filter substrate and the array substrate to display different images according to the viewing direction of the user, and the front and side luminance by differently designing the sub-pixel size and the opening area transmitted to the front or side according to the purpose of use. Multi-view display comprising a parallax barrier to control. The liquid crystal display panel of claim 1, wherein the liquid crystal display panel A color filter substrate having a color filter including a first sub-color filter, a second sub-color filter, and a third sub-color filter for a front view, a left view, and a right view; An array substrate on which thin film transistors are formed; And And a liquid crystal layer formed between the color filter substrate and the array substrate. The multi-view display according to claim 2, wherein the first sub-color filter to the third sub-color correspond to the first sub-pixel to the third sub-pixel. 4. The multi-view display according to claim 3, wherein the size of the first sub-pixel is designed to be smaller than the size of the second sub-pixel and the third sub-pixel in order to improve the side to side brightness. The multi-view display according to claim 4, wherein the opening area transmitted to the front of the parallax barrier is designed to be relatively narrow corresponding to the size of the first sub-pixel. 4. The multi-view display according to claim 3, wherein the size of the first sub-pixel is designed to be larger than the size of the second sub-pixel and the third sub-pixel to improve the front-to-side brightness. 7. The multi-view display according to claim 6, wherein the opening area transmitted to the front of the parallax barrier is designed to be relatively large corresponding to the size of the first sub-pixel. The multi view display of claim 3, wherein the parallax barrier has a stripe pattern in a horizontal direction or a vertical direction. 9. The method of claim 8, wherein when the width of the parallax barrier stripe pattern and the distance therebetween are M and Q, respectively, the distance between the stripe patterns of the parallax barrier, i.e., when the front and side luminances are seen uniformly, Multi-view display, characterized in that the width of the opening area of the barrier is set to about 15%.

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