TWI828518B - Transparent display - Google Patents

Abstract

A transparent display includes a first light-emitting panel, a second light-emitting panel and a dimming structure. The first light-emitting panel includes a first non-transmissive area and a first transmissive area. The first non-transmissive area includes first light-emitting elements. The second light-emitting panel includes a second non-transmissive area and a second transmissive area. The second non-transmitting area includes second light-emitting elements. The dimming structure includes a first driving electrode pattern, a second driving electrode pattern and a display medium located between the first light-emitting panel and the second-light emitting panel. The first driving electrode pattern has a mesh structure overlapping the first non-transmitting region and the second non-transmitting region.

Description

transparent display

The invention relates to a transparent display.

A double-sided monitor is a display device that can display different images on the front and back sides. For example, when a double-sided display is used to play an advertisement, the front side of the double-sided display can display the face of the product, while the back side can display product specifications or introduction. Currently, a double-sided display with double-sided display function can be produced by directly joining two sets of LCD display modules back-to-back. However, such double-sided displays are very thick and heavy. Another type of double-sided display is to share some optical components between two LCD modules. For example, the backlight module emits light from both sides, so that the two LCD modules share the backlight module. However, the double-sided displays mentioned above are not transparent displays. When viewing the double-sided display, there is no way to see the environment behind it through the double-sided display.

The present invention provides a transparent display that can prevent the images displayed by the first luminescent panel and the second luminescent panel from interfering with each other.

At least one embodiment of the present invention provides a transparent display. The transparent display includes a first light-emitting panel, a second light-emitting panel and a dimming structure. The first light-emitting panel includes a first non-light-transmitting area and a first light-transmitting area. The first non-light-transmitting area includes a plurality of first light-emitting elements. The second light-emitting panel includes a second non-light-transmitting area and a second light-transmitting area. The second non-light-transmitting area includes a plurality of second light-emitting elements. The dimming structure includes a first driving electrode pattern, a second driving electrode pattern and a display medium layer located between the first light-emitting panel and the second light-emitting panel. The first driving electrode pattern has a network structure overlapping the first non-light-transmitting area and the second non-light-transmitting area.

At least one embodiment of the present invention provides a transparent display. The transparent display includes a first light-emitting panel, a second light-emitting panel and a dimming structure. The first light-emitting panel includes a first non-light-transmitting area and a first light-transmitting area. The first non-light-transmitting area includes a plurality of first light-emitting elements. The second light-emitting panel includes a second non-light-transmitting area and a second light-transmitting area. The second non-light-transmitting area includes a plurality of second light-emitting elements. The dimming structure includes a plurality of scanning lines, a plurality of thin film transistors, a first driving electrode pattern, and a display medium layer. The scanning lines, data lines and display medium layer are located between the first light-emitting panel and the second light-emitting panel. The scanning lines and the data lines together form a network structure overlapping the first non-light-transmitting area and the second non-light-transmitting area. Each thin film transistor is electrically connected to a corresponding scan line and a corresponding data line. The first driving electrode pattern includes a plurality of first transparent electrodes. The first transparent electrode overlaps the first light-transmitting area and the second light-transmitting area. Each first transparent electrode is electrically connected to a corresponding thin film transistor.

1,2,3,4:Transparent display

10:First luminous panel

11: First non-transparent area

12: The first light-transmitting area

20:Second light emitting panel

21: The second non-transparent area

22: The second light-transmitting area

30, 30A, 30B: dimming structure

110: First transparent substrate

120: First transparent covering layer

130: First circuit structure

140: First light-emitting element

150:Transparent encapsulation layer

210: Second transparent substrate

220: Second transparent covering layer

230: Second circuit structure

240: Second light-emitting element

250:Transparent encapsulation layer

310: First transparent substrate

320: Second transparent substrate

330, 330A, 330B: first driving electrode pattern

340, 340A, 340B: Second drive electrode pattern

332:First cadre

334:First Branch

350,370: Insulation layer

360,360A: Display media layer

362:Dye

364:Liquid crystal molecules

366:Black charged particles

402: First optical adhesive layer

404: Second optical adhesive layer

CH: semiconductor channel layer

D: drain

D1: first direction

D2: second direction

DL: data line

E1: first sub-electrode

E2: Second sub-electrode

G: gate

PE: first transparent electrode

S: source

SL: scan line

TFT: thin film transistor

1A is a schematic cross-sectional view of a transparent display according to an embodiment of the present invention.

FIG. 1B is a schematic top view of the first light-emitting panel of FIG. 1A.

FIG. 1C is a schematic bottom view of the second light-emitting panel of FIG. 1A .

FIG. 1D is a schematic top view of the dimming structure of FIG. 1A .

FIG. 2 is a driving signal waveform diagram of a transparent display according to an embodiment of the present invention.

FIG. 3 is a driving signal waveform diagram of a transparent display according to an embodiment of the present invention.

FIG. 4A is a schematic cross-sectional view of a transparent display according to an embodiment of the present invention.

FIG. 4B is a schematic top view of the dimming structure of FIG. 4A.

FIG. 5 is a schematic top view of a dimming structure according to an embodiment of the present invention.

FIG. 6A is a schematic cross-sectional view of a transparent display according to an embodiment of the present invention.

FIG. 6B is a schematic top view of the dimming structure of FIG. 6A.

FIG. 7A is a schematic cross-sectional view of a transparent display according to an embodiment of the present invention.

FIG. 7B is a schematic top view of the dimming structure of FIG. 7A.

FIG. 8 is a circuit schematic diagram of the dimming structure of FIG. 7A.

FIG. 1A is a schematic cross-sectional view of a transparent display 1 according to an embodiment of the present invention. FIG. 1B is a schematic top view of the first light-emitting panel of FIG. 1A. FIG. 1C is a schematic bottom view of the second light-emitting panel of FIG. 1A . FIG. 1D is a schematic top view of the dimming structure of FIG. 1A . Figure 1A corresponds to the position of line A-A’ in Figure 1B, Figure 1C and Figure 1D. Please refer to FIG. 1A , the transparent display 1 includes a first light-emitting panel 10 , a second light-emitting panel 20 and a light-modulating structure 30 . The dimming structure 30 is located between the first light-emitting panel 10 and the second light-emitting panel 20 and is respectively bonded to the first light-emitting panel 10 and the second light-emitting panel 20 through the first optical adhesive layer 402 and the second optical adhesive layer 404 .

Please refer to FIG. 1A and FIG. 1B , the first light-emitting panel 10 includes a first non-light-transmitting area 11 and a first light-transmitting area 12 . In this embodiment, the first light-emitting panel 10 includes a first transparent substrate 110, a first transparent covering layer 120, a first circuit structure 130, a plurality of first light-emitting elements 140 and a transparent encapsulation layer 150. The first transparent substrate 110 and the first transparent covering layer 120 overlap each other. The first circuit structure 130 , the plurality of first light-emitting elements 140 and the transparent encapsulation layer 150 are located between the first transparent substrate 110 and the first transparent covering layer 120 . The first non-light-transmitting area 11 includes a first circuit structure 130 and a first light-emitting element 140 . In this embodiment, the first circuit structure 130 and the first light-emitting element 140 are not provided in the first light-transmitting area 12 .

In FIG. 1A , the first circuit structure 130 is simply illustrated as a single-layer structure. However, in fact, the first circuit structure 130 may include multiple conductive layers and multiple insulating layers. In some embodiments, the first circuit structure 130 further includes a black matrix, whereby This reduces the probability of light penetrating the first non-light-transmitting area 11 . The range of the first non-light-transmitting area 11 of the first light-emitting panel 10 is defined by the first circuit structure 130 . In this embodiment, the first circuit structure 130 has a mesh structure, and the first light-transmitting area 12 corresponds to a portion of the mesh of the mesh structure. In this embodiment, the first transparent substrate 110 and the first circuit structure 130 located thereon may together form an active thin film transistor array driving backplane.

The first light emitting element 140 is bonded to the first circuit structure 130 . In some embodiments, the first light emitting element 140 includes a mini light emitting diode, a micro light emitting diode or other suitable light emitting element. The first light-emitting element 140 includes, for example, light-emitting diodes of different colors. For example, the first light-emitting element 140 includes a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode. In some embodiments, the transparent encapsulation layer 150 is disposed on the first light-emitting element 140 , and the transparent encapsulation layer 150 selectively extends from the first non-light-transmitting area 11 to the first light-transmitting area 12 . The first transparent covering layer 120 is disposed on the transparent encapsulation layer 150 , and the first transparent covering layer 120 is, for example, a surface protection glass cover, a polymer cover, a polymer film, or other suitable materials.

Please refer to FIG. 1A and FIG. 1C . The second light-emitting panel 20 includes a second non-light-transmitting area 21 and a second light-transmitting area 22 . In this embodiment, the second light-emitting panel 20 includes a second transparent substrate 210, a second transparent covering layer 220, a second circuit structure 230, a plurality of second light-emitting elements 240, and a transparent encapsulation layer 250. The second transparent substrate 210 and the second transparent covering layer 220 overlap each other. The second circuit structure 230 , the plurality of second light-emitting elements 240 and the transparent encapsulation layer 250 are located between the second transparent substrate 210 and the second transparent covering layer 220 . The second non-light-transmitting area 21 includes a second circuit structure 230 and a third Two light-emitting elements 240. In this embodiment, the second circuit structure 230 and the second light-emitting element 240 are not provided in the second light-transmitting area 22 .

In FIG. 1A , the second circuit structure 230 is simply illustrated as a single-layer structure. However, in fact, the second circuit structure 230 may include multiple conductive layers and multiple insulating layers. In some embodiments, the second circuit structure 230 further includes a black matrix, thereby reducing the probability of light penetrating the second non-light-transmitting region 21 . The range of the second non-light-transmitting area 21 of the second light-emitting panel 20 is defined by the second circuit structure 230 . In this embodiment, the second circuit structure 230 has a mesh structure, and the second light-transmitting area 22 corresponds to a portion of the mesh of the mesh structure. In this embodiment, the second transparent substrate 210 and the second circuit structure 230 located thereon may together form an active thin film transistor array driving backplane.

The second light emitting element 240 is coupled to the second circuit structure 230 . In some embodiments, the second light emitting element 240 includes a mini light emitting diode, a micro light emitting diode, or other suitable light emitting element. The second light-emitting element 240 includes, for example, light-emitting diodes of different colors. For example, the second light-emitting element 240 includes a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode. In some embodiments, the transparent encapsulation layer 250 is disposed on the second light-emitting element 240 , and the transparent encapsulation layer 250 selectively extends from the second non-light-transmitting area 21 to the second light-transmitting area 22 . The second transparent covering layer 220 is disposed on the transparent encapsulation layer 250 , and the second transparent covering layer 220 is, for example, a surface protection glass cover, a polymer cover, a polymer film, or other suitable materials.

Please refer to FIG. 1A and FIG. 1D. The dimming structure 30 includes a first transparent substrate 310, a second transparent substrate 320, a first driving electrode pattern 330, and a second driving electrode. Pattern 340, insulation layer 350 and display medium layer 360. The first transparent substrate 310 , the second transparent substrate 320 , the first driving electrode pattern 330 , the second driving electrode pattern 340 , the insulating layer 350 and the display medium layer 360 are located between the first light-emitting panel 10 and the second light-emitting panel 20 .

The first driving electrode pattern 330 and the second driving electrode pattern 340 are located on the first transparent substrate 310 . The first driving electrode pattern 330 and the second driving electrode pattern 340 are separated from each other. The first driving electrode pattern 330 and the second driving electrode pattern 340 have a network structure overlapping the first non-light-transmitting area 11 and the second non-light-transmitting area 21 whether viewed individually or in combination.

The first driving electrode pattern 330 includes a plurality of first sub-electrodes E1. Each first sub-electrode E1 includes a first trunk portion 332 and a plurality of first branch portions 334 . The first trunk portion 332 extends along the first direction D1. The first branch portion 334 is connected to the first trunk portion 332 and extends along the second direction D2.

The second driving electrode pattern 340 includes a plurality of second sub-electrodes E2. The first sub-electrodes E1 and the second sub-electrodes E2 are alternately arranged in the second direction D2. Each second sub-electrode E2 includes a second trunk portion 342 and a plurality of second branch portions 344 . The second trunk portion 342 extends along the first direction D1. The second branch part 344 is connected to the second trunk part 342 and extends along the second direction D2. The second trunk part 342 and the second branch part 344 are parallel to the first trunk part 332 and the first branch part 334 respectively.

In this embodiment, the first driving electrode pattern 330 and the second driving electrode pattern 340 belong to the same conductive layer. Specifically, the first driving electrode pattern 330 and the second driving electrode pattern 340 are defined through the same patterning process. of. In this embodiment, the first driving electrode pattern 330 and the second driving electrode pattern 340 include opaque conductive materials, such as metal. By overlapping the first driving electrode pattern 330 and the second driving electrode pattern 340 in the first non-light-transmitting area 11 and the second non-light-transmitting area 21 , the number of pairs of the first driving electrode pattern 330 and the second driving electrode pattern 340 can be reduced. The impact caused by the transmittance of the transparent display 1.

The insulating layer 350 is located above the first driving electrode pattern 330 and the second driving electrode pattern 340 and covers the first driving electrode pattern 330 and the second driving electrode pattern 340 . In some embodiments, the material of the insulating layer 350 includes polyimide, silicon oxide, silicon nitride or other suitable materials.

The display medium layer 360 is located on the insulating layer 350 and includes dye 362 and liquid crystal molecules 364. For example, regular liquid crystal molecules, monomers, dichroic dyes and photoinitiators are provided between the first transparent substrate 310 and the second transparent substrate 320, and then ultraviolet light is irradiated to cause a polymerization reaction to form a display. Dielectric layer 360. In this embodiment, vertical alignment (Vertieal Alignment, VA) technology is used to align the liquid crystal molecules 364 . For example, the liquid crystal molecules 364 are aligned through the polyimide alignment films on the first transparent substrate 310 and the second transparent substrate 320 .

In some embodiments, when the long axis of the liquid crystal molecules 364 is in a horizontal state, the dimming structure 30 is in a bright state where light can pass through; when the long axis of the liquid crystal molecules 364 is in a vertical state, the dimming structure 30 is in a bright state where light can pass through. A dark state that blocks the passage of light. By making the display medium layer 360 include the dye 362, the dark state of the dimming structure 30 can be closer to black.

In this embodiment, the first driving electrode pattern 330 and the second driving electrode pattern 330 The pattern 340 is configured to control the display medium layer 360 using In-Plane Switching (IPS) technology, in which a driving voltage is applied to one of the first driving electrode pattern 330 and the second driving electrode pattern 340 (for example, in switching between 20 volts and 0 volts) and applying a common voltage to the other (e.g. maintained at 0 volts). In other embodiments, the first driving electrode pattern 330 and the second driving electrode pattern 340 may be configured using twisted nematic (TN) technology, fringe field switching (Fringe Field Switching (FFS) technology, or other suitable to control the display medium layer 360.

Through the arrangement of the light-adjusting structure 30, it is possible to prevent the images displayed by the first light-emitting panel 10 and the second light-emitting panel 20 from interfering with each other. Specifically, the dimming structure 30 can block the backside light leakage of the first light-emitting panel 10 toward the second light-emitting panel 20 and the backside light leakage of the second light-emitting panel 20 toward the first light-emitting panel 10 , thereby achieving high High-quality transparent double-sided display effect.

FIG. 2 is a driving signal waveform diagram of a transparent display according to an embodiment of the present invention. In FIG. 2 , the top diagram is a signal waveform diagram of the current and time (frame) of the first light-emitting element 140 of the first light-emitting panel 10 , and the middle diagram is the first driving electrode pattern 330 (or The signal waveform diagram of the voltage (driving voltage) and time (frame) of the second driving electrode pattern 340). The bottom diagram is the signal waveform diagram of the current and time (frame) of the second light-emitting element 240 of the second light-emitting panel 20. .

Please refer to Figure 1A and Figure 2 to adjust the driving voltage of the dimming structure 30 so that the transmittance of the dimming structure 30 is less than 30% (for example, the transmittance T=10%) or greater than 70% (for example, penetration rate T=90%). In the same frame, the dimming structure 30 includes a high transmittance state and a low transmittance state. In some embodiments, when the driving voltage is a high voltage, the transmittance of the dimming structure 30 is large. In other embodiments, when the driving voltage is low voltage, the transmittance of the dimming structure 30 is large.

When the dimming structure 30 is in a low transmittance state, current is applied to the first light-emitting element 140 of the first light-emitting panel 10 and the second light-emitting element 240 of the second light-emitting panel 20 to cause the first light-emitting element 140 and the second light-emitting element 240 to emit light. Element 240 emits light. Since the dimming structure 30 at this time has low transmittance, the light emitted by the first light-emitting element 140 and the light emitted by the second light-emitting element 240 are not likely to interfere with each other. When the light-adjusting structure 30 is in a high transmittance state, the user can easily see through the light-adjusting structure 30 .

In the embodiment of FIG. 2 , the brightness of the first light-emitting panel 10 and the second light-emitting panel 20 is controlled through pulse-width modulation (PWM). Specifically, in order to obtain different brightnesses W255, W128, and W64, the time for applying current to the first light-emitting element 140 or the second light-emitting element 240 is adjusted. The longer the time for applying the current, the higher the brightness.

In the embodiment of FIG. 3 , the brightness of the first light-emitting panel 10 and the second light-emitting panel 20 is controlled through pulse-amplitude modulation (PAM). Specifically, in order to obtain different brightnesses W255, W128, and W64, the magnitude of the current applied to the first light-emitting element 140 or the second light-emitting element 240 is adjusted. The larger the applied current, the higher the brightness.

In some embodiments, pulse width modulation can be combined with pulse amplitude modulation The brightness of the first light-emitting panel 10 and the second light-emitting panel 20 is controlled in a variable manner.

FIG. 4A is a schematic cross-sectional view of a transparent display 2 according to an embodiment of the present invention. FIG. 4B is a schematic top view of the dimming structure of FIG. 4A. It must be noted here that the embodiment of FIGS. 4A and 4B follows the component numbers and part of the content of the embodiment of FIGS. 1A to 1D , where the same or similar numbers are used to represent the same or similar elements, and the same or similar elements are omitted. Description of technical content. For descriptions of omitted parts, reference may be made to the foregoing embodiments and will not be described again here.

Please refer to FIG. 4A and FIG. 4B . The first driving electrode pattern 330 and the second driving electrode pattern 340 of the dimming structure 30 belong to different conductive layers. The insulating layer 350 is sandwiched between the first driving electrode pattern 330 and the second driving electrode pattern 340 . The second driving electrode pattern 340 is located on the insulating layer 350 , and the insulating layer 370 is located on the second driving electrode pattern 340 and the insulating layer 350 .

In this embodiment, arranging the first driving electrode pattern 330 and the second driving electrode pattern 340 on different conductive layers helps to reduce the probability of short circuit between the first driving electrode pattern 330 and the second driving electrode pattern 340 .

FIG. 5 is a schematic top view of a dimming structure according to an embodiment of the present invention. It must be noted here that the embodiment of FIG. 5 follows the component numbers and part of the content of the embodiment of FIGS. 1A to 1D , where the same or similar numbers are used to represent the same or similar elements, and references with the same technical content are omitted. instruction. For descriptions of omitted parts, reference may be made to the foregoing embodiments and will not be described again here.

Please refer to FIG. 5 . The dimming structure 30 includes a first transparent substrate (please refer to FIG. 1A ), a second transparent substrate (please refer to FIG. 1A ), a first driving electrode pattern 330 , and a first transparent substrate (please refer to FIG. 1A ). Two driving electrode patterns 340, an insulating layer (please refer to FIG. 1A), a display medium layer (please refer to FIG. 1A), a first branch transparent electrode 380 and a second branch transparent electrode 390.

Each first branch transparent electrode 380 is connected to the corresponding first sub-electrode E1 and extends from a position overlapping the first non-light-transmitting area 11 and the second non-light-transmitting area 21 to overlapping the first light-transmitting area 12 and the position of the second light-transmitting area 22. Each first branch transparent electrode 380 includes a third trunk portion 382 and a plurality of third branch portions 384 . The third trunk portion 382 extends along the first direction D1. The third branch portion 384 is connected to the third trunk portion 384 and extends along the second direction D2.

Each second branch transparent electrode 390 is connected to the corresponding second sub-electrode E2 and extends from a position overlapping the first non-light-transmitting area 11 and the second non-light-transmitting area 21 to overlapping the first light-transmitting area 12 and the position of the second light-transmitting area 22. Each second branch transparent electrode 390 includes a fourth trunk portion 392 and a plurality of fourth branch portions 394 . The fourth trunk portion 392 extends along the first direction D1. The fourth branch portion 394 is connected to the fourth trunk portion 394 and extends along the second direction D2.

In this embodiment, the first branch transparent electrodes 380 and the second branch transparent electrodes 390 are both comb-shaped electrodes, and the first branch transparent electrodes 380 and the second branch transparent electrodes 390 are staggered with each other. By adding the first branch transparent electrode 380 and the second branch transparent electrode 390 to the mesh-shaped first driving electrode pattern 330 and the second driving electrode pattern 340, the liquid crystal molecules in the display medium layer can be controlled more uniformly.

In this embodiment, the first branch transparent electrode 380 and the second branch transparent electrode 390 include transparent conductive materials, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, and indium gallium zinc oxide. , or stacked layers of materials.

FIG. 6A is a schematic cross-sectional view of a transparent display 3 according to an embodiment of the present invention. FIG. 6B is a schematic top view of the dimming structure of FIG. 6A. It must be noted here that the embodiment of FIGS. 6A and 6B follows the component numbers and part of the content of the embodiment of FIGS. 1A to 1D , where the same or similar numbers are used to represent the same or similar elements, and the same or similar elements are omitted. Description of technical content. For descriptions of omitted parts, reference may be made to the foregoing embodiments and will not be described again here.

Referring to FIGS. 6A and 6B , the dimming structure 30A includes a first transparent substrate 310 , a second transparent substrate 320 , a first driving electrode pattern 330A, a second driving electrode pattern 340A and a display medium layer 360A. The first transparent substrate 310 , the second transparent substrate 320 , the first driving electrode pattern 330A, the second driving electrode pattern 340A and the display medium layer 360A are located between the first light-emitting panel 10 and the second light-emitting panel 20 .

The first driving electrode pattern 330A and the second driving electrode pattern 340A are respectively located on the first transparent substrate 310 and the second transparent substrate 320. The first driving electrode pattern 330A and the second driving electrode pattern 340A are separated from each other. The first driving electrode pattern 330A has a mesh structure overlapping the first non-light-transmitting area 11 and the second non-light-transmitting area 21 . The second driving electrode pattern 340A has a planar structure overlapping the first light-transmitting area 12 , the second light-transmitting area 22 , the first non-light-transmitting area 11 and the second non-light-transmitting area 21 .

In this embodiment, the first driving electrode pattern 330A is made of opaque conductive material, such as metal. By overlapping the first driving electrode pattern 330A with the first non-light-transmitting area 11 and the second non-light-transmitting area 21 , the impact of the first driving electrode pattern 330A on the transmittance of the transparent display 3 can be reduced.

In this embodiment, the second driving electrode pattern 340A includes a transparent conductive material, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium gallium zinc oxide, or a stacked layer of materials. .

The display medium layer 360A is located between the first driving electrode pattern 330A and the second driving electrode pattern 340A, and includes black charged particles 366.

In this embodiment, the first driving electrode pattern 330A and the second driving electrode pattern 340A are configured to control the display medium layer 360A using electrophoretic technology, wherein one of the first driving electrode pattern 330A and the second driving electrode pattern 340A is One applies a positive voltage, and the other applies a negative voltage. When the black charged particles 366 are attracted to the first driving electrode pattern 330A, light can pass through the mesh-shaped first driving electrode pattern 330A and make the dimming structure 30A appear in a bright state; when the black charged particles 366 are attracted to the second When the electrode pattern 340A is driven, the black charged particles 366 cover the entire second driving electrode pattern 340A, causing the dimming structure 30A to appear in a dark state.

Through the arrangement of the dimming structure 30A, the images displayed by the first light-emitting panel 10 and the second light-emitting panel 20 can be prevented from interfering with each other. Specifically, the dimming structure 30A can block the backside light leakage of the first light-emitting panel 10 toward the second light-emitting panel 20 and the backside light leakage of the second light-emitting panel 20 toward the first light-emitting panel 10 , thereby achieving high High-quality transparent double-sided display effect.

FIG. 7A is a schematic cross-sectional view of a transparent display 4 according to an embodiment of the present invention. FIG. 7B is a schematic top view of the dimming structure of FIG. 7A. FIG. 8 is a circuit schematic diagram of the dimming structure of FIG. 7A. It must be noted here that the embodiments of FIGS. 7A to 8 follow the component numbers and part of the contents of the embodiments of FIGS. 1A to 1D , where the The same or similar elements are represented by the same or similar reference numerals, and descriptions of the same technical content are omitted. For descriptions of omitted parts, reference may be made to the foregoing embodiments and will not be described again here.

Please refer to FIGS. 7A to 8 , the dimming structure 30B includes a first transparent substrate 310, a second transparent substrate 320, a scanning line SL, a data line DL, a thin film transistor TFT, a first driving electrode pattern 330B, and a second driving electrode pattern. 340B, insulating layer 350, insulating layer 370 and display medium layer 360. The first transparent substrate 310 , the second transparent substrate 320 , the first driving electrode pattern 330B, the second driving electrode pattern 340B, the insulating layer 350 , the insulating layer 370 and the display medium layer 360 are located in the first light-emitting panel 10 and the second light-emitting panel 20 between.

The thin film transistor TFT is located on the first transparent substrate 310 and is electrically connected to the corresponding scan line SL and the corresponding data line DL. The thin film transistor TFT includes a gate electrode G, a semiconductor channel layer CH, a source electrode S, and a drain electrode D. Gate G is connected to the corresponding scan line SL. The insulating layer 350 covers the gate G, the semiconductor channel layer CH and the scan line SL. The semiconductor channel layer CH is located on the insulating layer 350 and overlaps the gate G. In this embodiment, the insulating layer 350 can serve as a gate insulating layer. The source S and the drain D are connected to the semiconductor channel layer CH. The source S is connected to the corresponding data line DL. The insulating layer 370 is located on the data line DL, the source S and the drain D.

In this embodiment, the scan line SL extends along the second direction D2, and the data line DL extends along the first direction D1. The scan lines SL and the data lines DL together form a network structure overlapping the first non-light-transmitting area 11 and the second non-light-transmitting area 21 . In this embodiment, the scan line SL, the data line DL and the thin film transistor TFT all Overlapping the first non-light-transmitting area 11 and the second non-light-transmitting area 21 , thereby reducing the impact of the scanning line SL, the data line DL and the thin film transistor TFT on the transmittance of the transparent display 4 .

In this embodiment, the thin film transistor TFT is a bottom gate type thin film transistor, but the invention is not limited thereto. According to other embodiments, the above-mentioned thin film transistor TFT may also be a top gate thin film transistor, a double gate thin film transistor, or other types of thin film transistors.

The first driving electrode pattern 330B is on the first transparent substrate 310 . In this embodiment, the first driving electrode pattern 330B is located on the insulating layer 370 and is electrically connected to the drain D. In this embodiment, the first driving electrode pattern 330B includes a plurality of first transparent electrodes PE, and each first transparent electrode PE is electrically connected to the drain D of the corresponding thin film transistor TFT. The first transparent electrode PE overlaps the first light-transmitting area 12 and the second light-transmitting area 22 .

The second driving electrode pattern 340B is located on the second transparent substrate 320. The second driving electrode pattern 340B has a planar structure overlapping the first light-transmitting area 12 , the second light-transmitting area 22 , the first non-light-transmitting area 11 and the second non-light-transmitting area 21 .

In this embodiment, the first driving electrode pattern 330B and the second driving electrode pattern 340B include transparent conductive materials, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, and indium gallium zinc oxide. , or stacked layers of materials.

The display dielectric layer 360 is located on the insulating layer 370 and between the first driving electrode patterns 330B and the second driving electrode patterns 340B. The display medium layer 360 includes dyes 362 and liquid crystal molecules 364 . For example, we provide orthomorphic liquid crystal molecules, single The body, dichroic dye and photoinitiator are placed between the first transparent substrate 310 and the second transparent substrate 320, and then are irradiated with ultraviolet light to cause a polymerization reaction, thereby forming the display medium layer 360.

In this embodiment, the first driving electrode pattern 330B and the second driving electrode pattern 340B are configured to control the display medium layer 360 using twisted nematic (TN) technology. There is a liquid crystal capacitor Cls between the first driving electrode pattern 330B and the second driving electrode pattern 340B, and a storage capacitance Cs between the first driving electrode pattern 330B and the capacitor electrode (not shown in FIGS. 7A and 7B ), where the capacitor electrode is such as It belongs to the same conductive layer as the scan line SL.

Through the arrangement of the dimming structure 30B, the images displayed by the first light-emitting panel 10 and the second light-emitting panel 20 can be prevented from interfering with each other. Specifically, the dimming structure 30 can block the backside light leakage of the first light-emitting panel 10 toward the second light-emitting panel 20 and the backside light leakage of the second light-emitting panel 20 toward the first light-emitting panel 10 , thereby achieving high High-quality transparent double-sided display effect.

1:Transparent display

10:First luminous panel

11: First non-transparent area

12: The first light-transmitting area

20:Second light emitting panel

21: The second non-transparent area

22: The second light-transmitting area

30: Dimming structure

110: First transparent substrate

120: First transparent covering layer

130: First circuit structure

140: First light-emitting element

150:Transparent encapsulation layer

210: Second transparent substrate

220: Second transparent covering layer

230: Second circuit structure

240: Second light-emitting element

250:Transparent encapsulation layer

310: First transparent substrate

320: Second transparent substrate

330: First driving electrode pattern

340: Second driving electrode pattern

350:Insulation layer

360: Display media layer

362:Dye

364:Liquid crystal molecules

402: First optical adhesive layer

404: Second optical adhesive layer

Claims (10)

A transparent display includes: a first light-emitting panel, including a first non-light-transmitting area and a first light-transmitting area, wherein the first non-light-transmitting area includes a plurality of first light-emitting elements; a second light-emitting panel , including a second non-light-transmitting area and a second light-transmitting area, wherein the second non-light-transmitting area includes a plurality of second light-emitting elements; and a light modulation structure including: a first driving electrode pattern and a A second driving electrode pattern is located between the first light-emitting panel and the second light-emitting panel, wherein the first driving electrode pattern has a mesh structure overlapping the first non-light-transmitting area and the second non-light-transmitting area. ; And a display medium layer located between the first light-emitting panel and the second light-emitting panel. The transparent display of claim 1, wherein the display medium layer includes black charged particles or the display medium layer includes dyes and liquid crystal molecules. The transparent display of claim 1, wherein the second driving electrode pattern has another mesh structure overlapping the first non-light-transmitting area and the second non-light-transmitting area, and wherein the first driving electrode pattern The second driving electrode pattern includes a plurality of first sub-electrodes and a plurality of second sub-electrodes respectively. The first sub-electrodes and the second sub-electrodes are alternately arranged, and each first sub-electrode includes: a first sub-electrode. a main trunk portion extending along a first direction; and a plurality of first branch portions connected to the first trunk portion and extending along a second direction. extending, and each second sub-electrode includes: a second trunk portion extending along the first direction; and a plurality of second branch portions connected to the second trunk portion and extending along the second direction. The transparent display of claim 3, wherein the first driving electrode pattern and the second driving electrode pattern include opaque conductive materials, and the dimming structure further includes: a plurality of first branch transparent electrodes, each of the first branch The transparent electrode is connected to the corresponding first sub-electrode; and a plurality of second branch transparent electrodes are connected to the corresponding second sub-electrode. The transparent display as claimed in claim 4, wherein each of the first branch transparent electrodes includes: a third trunk portion extending along the first direction; and a plurality of third branch portions connected to the third trunk portion, and Extending along the second direction, each second branch transparent electrode includes: a fourth trunk portion extending along the first direction; and a plurality of fourth branch portions connected to the fourth trunk portion and extending along the The second direction extends. The transparent display of claim 1, wherein the first driving electrode pattern and the second driving electrode pattern belong to the same conductive layer. The transparent display of claim 1, wherein an insulating layer is sandwiched between the first driving electrode pattern and the second driving electrode pattern. The transparent display of claim 1, wherein the second driving electrode pattern has a pattern that overlaps the first light-transmitting area, the second light-transmitting area, the first non-light-transmitting area, and the second non-light-transmitting area. A planar structure, wherein the display medium layer is located between the first driving electrode pattern and the second driving electrode pattern. A transparent display includes: a first light-emitting panel including a first non-light-transmitting area and a first light-transmitting area, wherein the first non-light-transmitting area includes a plurality of first light-emitting elements; a second light-emitting panel , including a second non-light-transmitting area and a second light-transmitting area, wherein the second non-light-transmitting area includes a plurality of second light-emitting elements; and a light modulation structure including: a plurality of scanning lines and a plurality of data lines, located between the first light-emitting panel and the second light-emitting panel, wherein the scanning lines and the data lines together form a network structure overlapping the first non-light-transmitting area and the second non-light-transmitting area. ; And a plurality of thin film transistors, each thin film transistor is electrically connected to a corresponding scan line and a corresponding data line; a first driving electrode pattern, including a plurality of first transparent electrodes, the first transparent electrodes overlap the first light-transmitting area and the second light-transmitting area, wherein each first transparent electrode is electrically connected to a corresponding thin film transistor; and a display medium layer is located between the first light-emitting panel and the second light-emitting panel between. The transparent display of claim 9, further comprising: a second driving electrode pattern overlapping the first light-transmitting area, the second light-transmitting area, the first non-light-transmitting area and the second non-light-transmitting area. region, wherein the display medium layer is located between the first driving electrode pattern and the second driving electrode pattern.