CN105353533B - Display panel and display device using the same - Google Patents

Abstract

The present invention discloses a display panel, comprising: a first substrate; a second substrate, arranged opposite to the first substrate, and comprising a plurality of pixel areas distributed in a matrix, wherein each pixel area comprises at least one color display area and at least one light transmission area; a display medium layer, arranged between the first substrate and the second substrate; and a light transmittance control layer, arranged on the first substrate, the second substrate or the display medium layer corresponding to at least one light transmission area. The present invention also relates to a transparent display device comprising the above display panel.

Description

Display panel and display device using same

technical field

The invention relates to a display panel and a display device using the same, in particular to a transparent display panel and a transparent display device using the same.

Background technique

With the development of science and technology, the application fields of displays are also becoming more and more extensive. Since the transparent display itself has a certain degree of transmittance, it can clearly show the background behind the display panel. Therefore, compared with the non-transparent display, the transparent display can also be used as an information display in addition to the original transparent display function. Development potential, therefore, transparent display has become one of the development focus of future display equipment.

Since the transparent display needs to allow users to clearly observe the rear background through itself, generally a certain degree of penetration area is distributed in the display panel to achieve the effect of simultaneously displaying images and maintaining a certain degree of penetration. However, the design of the above-mentioned conventional transparent display has a certain degree of penetrating area, which often leads to insufficient contrast of the displayed image, and when the ambient light source is too strong, the contrast of the displayed image is more likely to be insufficient, resulting in The displayed image cannot meet the user's needs.

Therefore, it is necessary to develop a transparent display with both transmittance and image contrast.

Contents of the invention

The main purpose of the present invention is to provide a display substrate, in order to control the partial light transmittance of the display substrate by setting a light transmittance control layer in the light transmittance area of the display substrate, so as to prepare a display with both transmittance and image contrast. transparent display.

In order to achieve the above object, the present invention provides a display panel, the display panel has a plurality of pixel areas distributed in a matrix, the pixel area has a color rendering area and a light transmission area, wherein the display panel includes: a first substrate; A second substrate, which is arranged opposite to the first substrate; a display medium layer, which is arranged between the first substrate and the second substrate; and a light transmittance control layer, located in the light transmission area, and located Between the first substrate and the second substrate.

In one embodiment, the transmittance control layer can be an electrochromic material or a photochromic material.

In one embodiment, the light transmittance control layer is also located in the color developing area.

In one embodiment, the transmittance control layer is a photochromic material.

In one embodiment, the light-transmitting region may account for 5% to 90% of the total area of the display panel.

In one embodiment, the transmittance of the light transmittance control layer can vary from 10% to 80%.

In one embodiment, the light transmittance control layer and the display medium layer can be located at the same layer.

In one embodiment, the first substrate or the second substrate further includes a color filter, which can be disposed between the first substrate and the second substrate.

In one embodiment, the light transmittance control layer and the color filter are located at the same layer.

In one embodiment, the display medium layer can be a liquid crystal layer or an organic light emitting diode layer.

Accordingly, by including the above-mentioned display panel with a light transmittance control layer, the present invention can produce a transparent display device with both transmittance and image contrast.

Description of drawings

FIG. 1 is a schematic diagram of a partial structure of a display panel 1 according to Embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of a partial structure of a display panel 2 according to Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of a partial structure of a display panel 3 according to Embodiment 3 of the present invention;

FIG. 4 is a schematic diagram of a partial structure of a display panel 4 according to Embodiment 4 of the present invention;

FIG. 5 is a schematic diagram of a partial structure of a display panel 5 according to Embodiment 5 of the present invention;

FIG. 6 is a partial structural schematic diagram of a display panel 6 according to Embodiment 6 of the present invention;

FIG. 7 is a partial structural schematic diagram of a display panel 7 according to Embodiment 7 of the present invention;

FIG. 8 is a schematic diagram of a partial structure of a display panel 8 according to Embodiment 8 of the present invention;

FIG. 9 is a schematic diagram of a partial structure of a display panel 9 according to Embodiment 9 of the present invention;

Fig. 10 is a partial structural schematic diagram of a display panel 9' according to Embodiment 10 of the present invention;

Fig. 11 is a schematic diagram of a partial structure of a display panel 9" according to Embodiment 11 of the present invention;

FIG. 12 is a schematic structural diagram of a transparent display device 100 of the present invention.

[Description of Reference Signs]

1, 2, 3, 4, 5, 6, 7, 8, 9, 9’, 9” display panel

11, 21, 31, 41, 51, 61, 71, 81, 91, 91’, 91” First base plate

111, 211, 311, 411, 511, 611, 711, 811, 911, 911’, 911” TFT

112, 212, 312, 412, 512, 912, 912’, 912” planarization layer

113, 213, 313, 413, 513, 913, 913’, 913” insulation

114, 214, 314, 414, 514, 614, 714, 814, 914, 914’, 914” first electrode

12, 22, 32, 42, 52, 62, 72, 82, 92, 92’, 92” second base plate

121, 221, 321, 421, 521, 621, 721, 921, 921’, 921” second electrode

13, 23, 33, 43, 53, 63, 73, 83, 93, 93’, 93” display media layer

931, 931’, 931” Red OLED

932, 932’, 932” Blue OLED

933, 933’, 933” Green OLED

14, 24, 34, 44, 54, 64, 74, 84, 94, 94’, 94” transmittance control layer

15, 25, 35, 45, 55, 65, 75, 85 color filters

151, 251, 351, 451, 551, 651, 751, 851 Red filter

152, 252, 352, 452, 552, 652, 752, 852 blue filter

153, 253, 353, 453, 553, 653, 753, 853 Green filter

16, 26, 36, 46, 56, 66, 76, 86, 96, 96’, 96” encapsulation layer

87 Backlight

A color area

B Translucent area

100 display devices

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

In the present invention, as long as the functions applicable to the transparent display device can be achieved, the present invention does not particularly limit the ratio of the light-transmitting area in the display panel, its configuration, and its pattern. For example, the light-transmitting region can account for 5% to 90% of the total area of the display panel, and its shape can be rectangle, triangle, circle, quadrangle, etc., and the invention is not limited thereto. In addition, the light-transmitting region and the red, green and blue sub-pixels can also be arranged in any common way. For example, the light-transmitting region can intersect or be aligned with the sub-pixels, or be disposed in the display panel in any common manner, and the present invention is not limited thereto.

In the present invention, in order to prepare a transparent display with both transmittance and image contrast, the light transmission area of the display panel of the present invention has a transmittance control layer that can adjust the transmittance to improve the poor image contrast of common transparent displays. disadvantages while maintaining the transmittance required for transparent displays. Preferably, in an embodiment of the present invention, the transmittance of the light transmittance control layer can vary from 10% to 80%, so as to control the image contrast of the display panel. More specifically, by setting the light transmittance control layer in the light transmission area, different transmittances can be changed in different areas of the display panel according to the image requirements, so as to improve the image contrast while maintaining the transmittance of the transparent display. effect.

In the present invention, the light transmittance control layer can be made of any material with controllable light transmittance, preferably, the electrochromic material or the photochromic material contained in the light transmittance control layer can be respectively It is a color-changing material that changes between transparent and dark (such as black, dark blue, dark brown, etc.), for example, black-transparent electrochromic material, black-transparent photochromic material, but the present invention is not limited thereto. For example, in one embodiment, the material of the light transmittance control layer can be the photochromic material, so the light transmittance control layer can change color according to the intensity of the background light source or ambient light, thereby achieving Block the background light source or ambient light without affecting the display effect; in another embodiment, the material of the light transmittance control layer can be an electrochromic material, and can optionally be equipped with a light sensor detector located in the pixel area to drive the light transmittance control layer to change color when the light sensor detector detects that the background light source or ambient light intensity is too large, thereby achieving the effect of blocking the background light source or ambient light without affecting the display.

In the present invention, the display panel may further include a color filter, which may be arranged between the first substrate and the display medium layer or between the second substrate and the display medium layer according to the design of the display panel, so that When the display medium used is liquid crystal or white light organic light emitting diode, different colors of light can be obtained. More specifically, the color filter can be correspondingly disposed on the color display area. In other words, when the display panel includes the color filter, the color area is the area including the color filter. Furthermore, the display panel can also use organic light emitting diodes such as red, green and blue as the display medium layer to achieve various colors required for display without disposing the color filter. In addition, any configuration and material of common color filters can be used, and the present invention is not limited thereto.

In the present invention, as long as it can be used to prepare a common display panel, any common material can be used to prepare the display medium layer. For example, the display medium layer can be a liquid crystal layer or an organic light emitting diode layer made of liquid crystal or organic light emitting diode, so that the obtained transparent liquid crystal display panel or transparent organic light emitting diode display panel can be used to prepare and image contrast transparent display device, but the present invention is not limited thereto.

Hereinafter, the present invention will be more specifically illustrated by the following examples.

<Example 1>

Please refer to FIG. 1 , which is a schematic diagram of a partial structure of a display panel 1 according to Embodiment 1 of the present invention. The display panel 1 has a plurality of pixel areas (A+B) distributed in a matrix, and each pixel area (A+B) has a color rendering area A and a light transmission area B, wherein the display panel 1 includes: a first Substrate 11; a second substrate 12, which is arranged opposite to the first substrate 11; a display medium layer 13, which is arranged between the first substrate 11 and the second substrate 12; and a light transmittance control layer 14 , which is located in the light-transmitting region B and on the second substrate 12; wherein, in this embodiment 1, the light transmittance control layer 14 includes a photochromic material, and the display medium layer 13 is an organic The light-emitting diode layer, and the light-emitting mode is a display panel that emits light from the top (as shown by the arrow).

In the first embodiment, the first substrate 11 is a substrate including a plurality of thin film transistors 111 , and further includes a planarization layer 112 disposed thereon, an insulating layer 113 and a first electrode 114 as a transparent electrode. The second substrate 12 is a substrate of a color filter 15, and the color filter 15 includes a red filter 151, a blue filter 152 and a green filter 153, the color filter 15 and the The light transmittance control layer 14 is disposed on the same layer, and the color filter 15 and the light transmittance control layer 14 are encapsulated by an encapsulation layer 16 , and a second electrode 121 having another transparent electrode is on the encapsulation layer 16 .

Accordingly, by disposing the light transmittance control layer 14 on the second substrate 12 in the light-transmitting region B, the display panel 1 prepared in Example 1 can be a transparent organic light-emitting diode display panel, and it can reach Both transmittance and image contrast effect.

<Example 2>

Embodiment 2 is roughly similar to Embodiment 1, and the only difference lies in the positions of the color filter and the transmittance control layer.

Please refer to FIG. 2 , which is a schematic diagram of a partial structure of a display panel 2 according to Embodiment 2 of the present invention. The display panel 2 has a plurality of pixel areas (A+B) distributed in a matrix, and each pixel area (A+B) has a color rendering area A and a light transmission area B, wherein the display panel 2 includes: a first Substrate 21; a second substrate 22, which is arranged opposite to the first substrate 21; a display medium layer 23, which is arranged between the first substrate 21 and the second substrate 22; and a light transmittance control layer 24 , which is located in the light-transmitting region B and on the first substrate 21 . Similar to Embodiment 1, the light transmittance control layer 24 of Embodiment 2 includes the photochromic material, and the display medium layer 23 is an OLED layer.

In the second embodiment, the first substrate 21 is also a substrate including a plurality of thin film transistors 211, and it also includes a planarization layer 212, an insulating layer 213, and a first transparent electrode as a transparent electrode. An electrode 214 and a color filter 25 disposed on the flat layer 212, and the color filter 25 includes a red filter 251, a blue filter 252 and a green filter 253, and the color filter The light sheet 25 includes a red filter 251 , a blue filter 252 and a green filter 253 , and the color filter 25 is disposed on the same layer as the transmittance control layer 24 . The second substrate 22 includes an encapsulation layer 26 and a second electrode 221 disposed between the second substrate 22 and the display medium layer 23 as another transparent electrode.

Accordingly, by disposing the light transmittance control layer 24 on the first substrate 21 corresponding to the light-transmitting region B, the display panel 2 prepared in Example 2 can also be a transparent organic light-emitting diode display panel, and it can Achieve the effect of both transmittance and image contrast.

<Example 3>

Embodiment 3 is substantially similar to Embodiment 1, the only difference being that the position of the transmittance control layer is different.

Please refer to FIG. 3 , which is a schematic diagram of a partial structure of a display panel 3 according to Embodiment 3 of the present invention. The display panel 3 has a plurality of pixel areas (A+B) distributed in a matrix, and each pixel area (A+B) has a color rendering area A and a light transmission area B, wherein the display panel 3 includes: a first Substrate 31; a second substrate 32, which is arranged opposite to the first substrate 31; a display medium layer 33, which is arranged between the first substrate 31 and the second substrate 32; and a light transmittance control layer 34 , which is located in the light-transmitting region B and located on the entire surface of the first substrate 31 facing the display medium layer 33 . Similar to Embodiment 1, the light transmittance control layer 34 of Embodiment 3 includes the photochromic material, and the display medium layer 33 is an OLED layer.

Similar to Embodiment 1, the first substrate 31 is also a substrate including a plurality of thin film transistors 311, and it also includes a planarization layer 312 disposed on the light transmittance control layer 34, an insulating layer 113 and as The first electrode 314 of the transparent electrode. The second substrate 32 is also the substrate of a color filter 35, wherein the color filter 35 includes a red filter 351, a blue filter 352 and a green filter 353, and the color filter 35 is set On the second substrate 32 and encapsulated by an encapsulation layer 36 , the second substrate 32 further includes a second electrode 321 disposed between the second substrate 32 and the display medium layer 33 as another transparent electrode.

Accordingly, by disposing the light transmittance control layer 34 on the entire surface of the first substrate 31 facing the display medium layer 33, and including the light transmittance control layer 34 at the place corresponding to the light transmission area B, this embodiment The display panel 3 prepared in Example 3 can also be a transparent organic light emitting diode display panel, and it can also achieve the effects of both transmittance and image contrast.

<Example 4>

Please refer to FIG. 4 , which is a schematic diagram of a partial structure of a display panel 4 according to Embodiment 4 of the present invention. The display panel 4 has a plurality of pixel areas (A+B) distributed in a matrix, and each pixel area (A+B) has a color rendering area A and a light transmission area B, wherein the display substrate 4 includes: a first Substrate 41; a second substrate 42, which is arranged opposite to the first substrate 41; a display medium layer 43, which is arranged between the first substrate 41 and the second substrate 42; and a light transmittance control layer 44 , which is located in the light transmission area B, and is located in the same layer as the display medium layer 43; wherein, in this embodiment 4, the light transmittance control layer 44 includes an electrochromic material, and the display medium layer 43 is An organic light emitting diode layer.

In Embodiment 4, the light transmittance control layer 44 is located on the same layer as the display medium layer 43, and is also sandwiched between the first electrode 414 and the second electrode 421 as transparent electrodes, and it includes the electrochromic material , so that the transmittance of the light transmittance control layer can be controlled to vary between 10% and 80% by applying an appropriate operating voltage.

In the fourth embodiment, the first substrate 41 is also a substrate including a plurality of thin film transistors 411, and it also includes a planarization layer 412 disposed thereon, an insulating layer 413 and a first transparent electrode. Electrode 414. The second substrate 42 is also a substrate of a color filter 45, wherein the color filter 45 includes a red filter 451, a blue filter 452 and a green filter 453, and the color filter 45 is set On the second substrate 42 and encapsulated by an encapsulation layer 46 , and the second substrate 42 further includes a second electrode 421 disposed between the second substrate 42 and the display medium layer 43 as another transparent electrode.

Accordingly, by providing the light transmittance control layer 44 interposed between the first electrode 414 and the second electrode 422 in the display medium layer 43 corresponding to the light transmission area B, the display prepared in Example 4 The panel 4 can also be a transparent organic light emitting diode display panel, and it can also achieve the effects of both transmittance and image contrast.

<Example 5>

Embodiment 5 is roughly similar to Embodiment 4, and the only difference is that the setting positions of the color filters are different.

Please refer to FIG. 5 , which is a schematic diagram of a partial structure of a display panel 5 according to Embodiment 5 of the present invention. The display panel 5 has a plurality of pixel areas (A+B) distributed in a matrix, and each pixel area (A+B) has a color rendering area A and a light transmission area B, wherein the display panel 5 includes: a first Substrate 51; a second substrate 52, which is arranged opposite to the first substrate 51; a display medium layer 53, which is arranged between the first substrate 51 and the second substrate 52; and a light transmittance control layer 54 , which is located in the light-transmitting region B and is located in the same layer as the display medium layer 53 . Similar to Embodiment 4, the light transmittance control layer 54 of Embodiment 5 is also sandwiched between the first electrode 514 and the second electrode 521 as transparent electrodes and it also includes an electrochromic material, and the display The dielectric layer 53 is also an OLED layer.

In Embodiment 5, the color filter 53 is disposed on the first substrate 51. Therefore, in Embodiment 5, the first substrate 51 is also a substrate including a plurality of thin film transistors 511, and it includes a A planarization layer 512 disposed thereon, an insulating layer 513, a first electrode 514 as a transparent electrode, and a color filter 55 disposed on the planarization layer 512, wherein the color filter 55 includes a red filter Light sheet 551 , blue color filter 552 and green color filter 553 . The second substrate 52 includes an encapsulation layer 56 and a second electrode 521 disposed between the second substrate 52 and the display medium layer 53 as another transparent electrode.

Accordingly, by setting the light transmittance control layer 54 sandwiched between the first electrode 514 and the second electrode 521 in the display medium layer 54 corresponding to the light transmission area B, the display prepared in Example 5 The panel 5 can also be a transparent organic light emitting diode display panel, and it can also achieve the effects of both transmittance and image contrast.

<Example 6>

Please refer to FIG. 6 , which is a schematic diagram of a partial structure of a display panel 6 according to Embodiment 6 of the present invention. The display panel 6 has a plurality of pixel areas (A+B) distributed in a matrix, and each pixel area (A+B) has a color rendering area A and a light transmission area B, wherein the display panel 6 includes: a first Substrate 61; a second substrate 62, which is arranged opposite to the first substrate 61; a display medium layer 63, which is arranged between the first substrate 61 and the second substrate 62; and a light transmittance control layer 64 , which is located in the light-transmitting region B and on the second substrate 62; wherein, in Embodiment 6, the light transmittance control layer 64 includes a photochromic material, and the display medium layer 63 is a liquid crystal Floor.

In Embodiment 6, the first substrate 61 is also a substrate including a plurality of thin film transistors 611, and further includes a first electrode 614 disposed thereon as a transparent electrode. The second substrate 62 is a substrate of a color filter 65, and the color filter 65 includes a red filter 651, a blue filter 652 and a green filter 653, the color filter 65 and the The transmittance control layer 64 is disposed on the same layer, located on the second substrate 62 and encapsulated by an encapsulation layer 66 , and a second electrode 621 having another transparent electrode is on the encapsulation layer 66 .

The display panel 6 of this embodiment 6 may include other components required by the liquid crystal display panel, such as an alignment layer or a polarizing element, etc., and those skilled in the art can select and match them according to their needs without departing from the scope of the spirit of the present invention. The present invention does not Especially limited to this.

Accordingly, by disposing the light transmittance control layer 64 on the second substrate 62 corresponding to the light transmission area B, the display panel 6 prepared in this embodiment 1 can be a transparent liquid crystal display panel, and it can achieve both It has the effect of transmittance and image contrast.

<Example 7>

Embodiment 7 is substantially similar to Embodiment 6, and the only difference is that the positions of the color filter and the transmittance control layer are different.

Please refer to FIG. 7 , which is a schematic diagram of a partial structure of a display panel 7 according to Embodiment 7 of the present invention. The display panel 7 has a plurality of pixel areas (A+B) distributed in a matrix, and each pixel area (A+B) has a color rendering area A and a light transmission area B, wherein the display panel 7 includes: a first Substrate 71; a second substrate 72, which is arranged opposite to the first substrate 71; a display medium layer 73, which is arranged between the first substrate 71 and the second substrate 72; and a light transmittance control layer 74 , which is located in the light-transmitting region B and on the first substrate 71 . Similar to Embodiment 6, the transmittance control layer 74 of Embodiment 7 includes a photochromic material, and the display medium layer 73 is a liquid crystal layer.

In the seventh embodiment, the first substrate 71 is also a substrate including a plurality of thin film transistors 711, and it also includes a first electrode 714 disposed thereon as a transparent electrode and disposed on the first electrode 714. color filter 75, and the color filter 75 includes a red filter 751, a blue filter 752 and a green filter 753, the color filter 75 and the transmittance control layer 74 are arranged on the same layer. The second substrate 72 includes an encapsulation layer 76 and a second electrode 721 disposed between the second substrate 72 and the display medium layer 73 as another transparent electrode.

Similar to the sixth embodiment, the display panel 7 of the seventh embodiment may also include other elements required by the liquid crystal display panel, which will not be repeated here.

Accordingly, by disposing the light transmittance control layer 74 on the first substrate 71 corresponding to the light transmission area B, the display panel 2 prepared in Example 7 can also be a transparent liquid crystal display panel, and it can achieve both It has the effect of transmittance and image contrast.

<Embodiment 8>

Embodiment 8 is substantially similar to Embodiment 6, and the only difference lies in the positions of the color filter and the transmittance control layer.

Please refer to FIG. 8 , which is a schematic diagram of a partial structure of a display panel 8 according to Embodiment 8 of the present invention. The display panel 8 has a plurality of pixel areas (A+B) distributed in a matrix, and each pixel area (A+B) has a color rendering area A and a light transmission area B, wherein the display panel 8 includes: a first Substrate 81; a second substrate 82, which is arranged opposite to the first substrate 81; a display medium layer 83, which is arranged between the first substrate 81 and the second substrate 82; and a light transmittance control layer 84 , which is located in the light-transmitting region B, and is located on the opposite side of the first substrate 81 facing the display medium layer 83, and the backlight source 87 required by the liquid crystal display panel is arranged on the first substrate 81 and the light transmittance Between the control layers 84, the light transmittance control layer 84 is prevented from reducing the brightness of the color-developing area. Similar to Embodiment 6, the light transmittance control layer 84 of Embodiment 8 includes a photochromic material, and the display medium layer 83 is a liquid crystal layer.

In Embodiment 8, the first substrate 81 is also a substrate including a plurality of thin film transistors 811, and further includes a first electrode 814 disposed thereon as a transparent electrode. The second substrate 82 is a substrate of a color filter 85, and the color filter 85 includes a red filter 851, a blue filter 852 and a green filter 853, and the color filter 85 is arranged on The second substrate 82 is encapsulated by an encapsulation layer 86 , and the second substrate 82 further includes a second electrode 821 disposed between the second substrate 82 and the display medium layer 83 as another transparent electrode.

Similar to the sixth embodiment, the display panel 7 of the seventh embodiment may also include other elements required by the liquid crystal display panel, which will not be repeated here.

Accordingly, by arranging the light transmittance control layer 84 on the opposite side of the first substrate 81 facing the display medium layer 83, and also including the light transmittance control layer 84 at the place corresponding to the light transmission area B, the present invention The display panel 8 prepared in Example 8 can also be a transparent liquid crystal display panel, and it can also achieve the effects of both transmittance and image contrast.

<Example 9>

Embodiment 9 is roughly similar to Embodiment 1, the only difference is that no color filter is provided, but organic light-emitting diodes such as red, green, and blue are used as the display medium layer to achieve various colors required for display.

Please refer to FIG. 9 , which is a schematic diagram of a partial structure of a display panel 9 according to Embodiment 9 of the present invention. The display panel 9 has a plurality of pixel areas (A+B) distributed in a matrix, and each pixel area (A+B) has a color rendering area A and a light transmission area B, wherein the display panel 9 includes: a first Substrate 91; a second substrate 92, which is arranged opposite to the first substrate 91; a display medium layer 93, which is arranged between the first substrate 91 and the second substrate 92; and a light transmittance control layer 94 , which is located in the light-transmitting region B and on the second substrate 92; wherein, in Embodiment 9, the light transmittance control layer 94 includes a photochromic material, and the display medium layer 13 is an organic The light emitting diode layer includes red organic light emitting diodes 931 , blue organic light emitting diodes 932 , and green organic light emitting diodes 933 .

In Embodiment 9, the first substrate 91 is a substrate including a plurality of thin film transistors 911 , and further includes a planarization layer 912 disposed thereon, an insulating layer 913 and a first electrode 914 as a transparent electrode. The second substrate 92 includes an encapsulation layer 96 and a second electrode 921 disposed between the second substrate 92 and the display medium layer 93 as another transparent electrode.

Accordingly, by disposing the light transmittance control layer 94 on the second substrate 92 in the light transmission region B, the display panel 9 prepared in Example 9 can be a transparent organic light emitting diode display panel, and it can reach Both transmittance and image contrast effect.

<Example 10>

Embodiment 10 is roughly similar to Embodiment 9, and the only difference lies in the position where the light transmittance control layer is disposed.

Please refer to FIG. 10 , which is a schematic diagram of a partial structure of a display panel 9' according to Embodiment 10 of the present invention. The display panel 9' has a plurality of pixel areas (A+B) distributed in a matrix, and each pixel area (A+B) has a color rendering area A and a light transmission area B, wherein the display panel 9' includes: a A first substrate 91'; a second substrate 92', which is arranged opposite to the first substrate 91'; a display medium layer 93', which is arranged between the first substrate 91' and the second substrate 92'; and a light transmittance control layer 94', which is located in the light transmission region B and on the first substrate 91'; wherein, in the tenth embodiment, the light transmittance control layer 94' includes a photochromic materials, and the display medium layer 93' is an organic light emitting diode layer, which may include red organic light emitting diodes 931', blue organic light emitting diodes 932', and green organic light emitting diodes 933'.

In this embodiment 10, the first substrate 91' is a substrate including a plurality of thin film transistors 911', and it also includes a planarization layer 912', an insulating layer 913' and a first transparent electrode as a transparent electrode. An electrode 914'. The second substrate 92' includes an encapsulation layer 96', and a second electrode 921' disposed between the second substrate 92' and the display medium layer 93' as another transparent electrode.

Accordingly, by disposing the light transmittance control layer 94' on the first substrate 91' corresponding to the light-transmitting region B, the display panel 9' prepared in Example 10 can be a transparent OLED display panel, And it can achieve the effect of both transmittance and image contrast.

<Example 11>

Embodiment 11 is roughly similar to Embodiment 9, and the only difference lies in the position where the light transmittance control layer is disposed.

Please refer to Fig. 11, which is a partial structural schematic diagram of a display panel 9" according to Embodiment 11 of the present invention. The display panel 9" has a plurality of pixel regions (A+B) distributed in a matrix, and each pixel region (A+B) It has a color-developing area A and a light-transmitting area B, wherein the display panel 9" includes: a first substrate 91"; a second substrate 92", which is arranged opposite to the first substrate 91"; a display medium layer 93", which is disposed between the first substrate 91" and the second substrate 92"; and a light transmittance control layer 94", which is located in the light transmission area B, and is located at the same location as the display medium layer 93". layer; wherein, in this embodiment 11, the light transmittance control layer 94" includes a photochromic material, and the display medium layer 93" is an organic light emitting diode layer, which may include red organic light emitting diodes 931", blue organic light emitting diode 932", and green organic light emitting diode 933".

In Embodiment 11, the light transmittance control layer 94" is located on the same layer as the display medium layer 93", and is also sandwiched between the first electrode 914" and the second electrode 921" as transparent electrodes, and it includes the The electrochromic material can control the transmittance of the light transmittance control layer to vary between 10% and 80% by applying an appropriate operating voltage.

In the eleventh embodiment, the first substrate 91" is a substrate including a plurality of thin film transistors 911", and it also includes a planarization layer 912", an insulating layer 913" and a first transparent electrode as a transparent electrode. An electrode 914". The second substrate 92" includes an encapsulation layer 96", and a second electrode 921" disposed between the second substrate 92" and the display medium layer 93" as another transparent electrode.

Accordingly, by disposing the light transmittance control layer 94" on the first substrate 91" corresponding to the light transmission area B, the display panel 9" prepared in Example 11 can be a transparent organic light emitting diode display panel, And it can achieve the effect of both transmittance and image contrast.

In addition, the display panel prepared in the foregoing embodiments of the present invention can also be applied to a transparent display device 100, as shown in FIG. . Here, the transparent tablet computer is only used as an example of the transparent display device, and other display devices such as transparent displays, mobile phones, and information navigators can also use the display panels prepared in the foregoing embodiments of the present invention. In addition, those skilled in the art can mix and select various elements required for the transparent display device without departing from the scope of the spirit of the present invention, and the present invention is not limited thereto.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention, and are not intended to limit the present invention. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims (8)

1. A display panel, the display panel has a plurality of pixel areas distributed in matrix, the pixel area has a color rendering area and a light transmission area, wherein the display panel comprises: a first substrate; a second substrate disposed opposite to the first substrate; A display medium layer disposed between the first substrate and the second substrate, the display medium layer being an organic light emitting diode layer; a first transparent electrode and a second transparent electrode, wherein the OLED layer is disposed between the first transparent electrode and the second transparent electrode; and a light transmittance control layer located in the light transmission area and between the first substrate and the second substrate; Wherein, the display medium layer and the light transmittance control layer are different layers; Wherein, the display medium layer and the light transmittance control layer are made of different materials. 2. The display panel as claimed in claim 1, wherein the transmittance control layer is an electrochromic material or a photochromic material. 3. The display panel as claimed in claim 1, wherein the light transmittance control layer is also located in the color developing area. 4. The display panel as claimed in claim 3, wherein the transmittance control layer is a photochromic material. 5. The display panel as claimed in claim 1, wherein the light-transmitting region accounts for 5% to 90% of the total area of the display panel. 6. The display panel as claimed in claim 1, wherein the transmittance of the light transmittance control layer varies between 10% and 80%. 7. The display panel as claimed in claim 1, further comprising a color filter disposed between the first substrate and the second substrate. 8. The display panel as claimed in claim 7, wherein the light transmittance control layer and the color filter are located at the same layer.