TW201401238A - Display panel - Google Patents

Abstract

A display panel including a substrate, a grid shielding pattern and a plurality of light-emitting devices is provided. The grid shielding pattern is disposed on the substrate so as to define a plurality of pixel regions on the substrate. The light-emitting devices are disposed on the substrate. At least one light-emitting device of the light-emitting devices is disposed in each pixel region of the pixel regions, wherein a square measure of the pixel region is A1, and a square measure of the light-emitting device is A2, and a ratio of A2 to A1 is below 50%.

Description

Display panel

The present disclosure relates to a display panel, and more particularly to a transparent display panel.

A transparent display is a display that has a certain degree of transparency. It not only displays information or pictures, but also allows the user to clearly see the background behind the display. At present, transparent displays are suitable for a variety of applications such as building windows, car windows and shop windows, and thus have received market attention.

However, at present, transparent display devices face problems such as low transparency and difficulty in displaying dark images. If the display transparency is low, the user will clearly observe the presence of the display itself, and the background behind the display cannot be clearly observed. In addition, when a general display displays a dark picture, the pixel area belonging to the dark picture will display a lower brightness. However, for a transparent display, if the luminance of the pixel region belonging to the dark picture is low, the background behind the pixel area is easily observed, and thus the transparent display is generally caused by the difficulty of gray scale control. The dark picture shows a bad question.

The present disclosure provides a display panel having a good transparent display effect.

The present disclosure provides a display panel having a good dark picture display effect.

The present disclosure proposes a display panel. The display panel includes a substrate, a mesh shading pattern, and a plurality of light emitting elements. The mesh shading pattern is disposed on the substrate to define a plurality of pixel regions on the substrate. The light emitting element is disposed on the substrate. Each of the pixel regions is provided with at least one light-emitting element, wherein the area of the pixel region is A1, the area of the light-emitting element is A2, and the ratio of A2 to A1 is 50% or less.

The disclosure further provides a display panel. The display panel includes a substrate, a mesh shading pattern, a plurality of light emitting elements, and a plurality of solar cells. The mesh shading pattern is disposed on the substrate to define a plurality of pixel regions on the substrate. The light emitting element is disposed on the substrate. The solar cell is disposed on the substrate, wherein each pixel area is provided with at least one light emitting element and at least one solar cell.

Based on the above, in the display panel of the present disclosure, the area of the light-emitting element occupies a relatively small area of the area of the pixel area, so that the transparency of the display panel can be improved. In addition, the display panel of the present disclosure is provided with a solar cell, and the solar cell absorbs light to help achieve gray scale control of the display panel to have a better dark picture display effect.

The above described features and advantages of the present invention will be more apparent from the following description.

100a, 100b, 100c, 100d, 100e, 100f, 100g, 100h, 100i, 100j, 100k‧‧‧ display panels

102‧‧‧Substrate

104‧‧‧ mesh shade pattern

106, 106x, 106y, 106z‧‧‧Lighting elements

106a‧‧‧First semiconductor layer

106b‧‧‧Lighting layer

106c‧‧‧second semiconductor layer

106d‧‧‧first electrode

106e‧‧‧second electrode

106f‧‧‧Insulation

106s‧‧‧ side

107‧‧‧Line layer

107v‧‧‧ conductive through hole

108‧‧‧Development glue

110‧‧‧ Coverage

112‧‧‧Optical adhesive

120, 120a, 120b, 120c‧‧‧ solar cells

122‧‧‧Electrochromic material layer

124‧‧‧Electrochromic battery

130‧‧‧Color filter pattern

130a‧‧‧First filter pattern

130b‧‧‧Second filter pattern

130c‧‧‧third filter pattern

140‧‧‧ third electrode

Area of the A1‧‧‧ pixel area

A2‧‧‧ area of light-emitting components

A3‧‧‧Development area of diffusion glue

H‧‧‧ openings

U‧‧‧ pixel area

FIG. 1 is a partial top plan view of a display panel according to a first embodiment of the present disclosure.

2A is a partial cross-sectional view of a display panel according to a first embodiment of the present disclosure.

2B is an enlarged schematic view of the light emitting element of FIG. 2A.

3 is a partial cross-sectional view showing a display panel according to a second embodiment of the present disclosure.

4 is a partial cross-sectional view showing a display panel according to a third embodiment of the present disclosure.

FIG. 5 is a partial cross-sectional view showing a display panel according to a fourth embodiment of the present disclosure.

FIG. 6 is a partial cross-sectional view showing a display panel according to a fifth embodiment of the present disclosure.

FIG. 7 is a partial cross-sectional view showing a display panel according to a sixth embodiment of the present disclosure.

FIG. 8 is a partial cross-sectional view showing a display panel according to a seventh embodiment of the present disclosure.

FIG. 9 is a partial cross-sectional view showing a display panel according to an eighth embodiment of the present disclosure.

FIG. 10 is a partial cross-sectional view showing a display panel according to a ninth embodiment of the present disclosure.

11 is a partial cross-sectional view showing a display panel according to a tenth embodiment of the present disclosure.

FIG. 12 is a partial cross-sectional view showing a display panel according to a tenth embodiment of the present disclosure.

FIG. 1 is a partial top plan view of a display panel according to a first embodiment of the present disclosure. 2A is a partial cross-sectional view of the display panel 100a according to the first embodiment of the present disclosure. Referring to FIGS. 1 and 2A , the display panel 100 a includes a substrate 102 , a mesh shading pattern 104 , and a plurality of light emitting elements 106 .

The substrate 102 is a transparent substrate. In detail, a transparent substrate refers to a substrate There is a certain degree of light transmittance, and the higher the light transmittance, the higher the transparency of the substrate. The substrate 102 can be a rigid substrate or a flexible substrate. The material of the hard substrate is, for example, glass, quartz or germanium wafer. The material of the flexible substrate is, for example, plastic. In addition, the designed wiring layer 107 may be disposed on the substrate 102 in accordance with the layout of the subsequently disposed components on the substrate 102. The wiring layer 107 may be located on the surface of the substrate 102 or may be integrated into the interior of the substrate 102.

The mesh shading pattern 104 is disposed on the substrate 102. The mesh shading pattern 104 has a mesh structure to define a plurality of pixel regions U on the substrate 102. In other words, the mesh shading pattern 104 has, for example, a plurality of openings H, each of which exposes one of the pixel regions U. The material of the mesh shading pattern 104 may be an organic polymer material, a photoresist, a metal, a dielectric material, an oxide, a semiconductor, or the like.

The light emitting element 106 is disposed on the substrate 102. Each of the pixel regions U may be provided with at least one light-emitting element 106. This embodiment is described by taking one light-emitting element 106 as an example. The light-emitting element 106 can be a light-emitting diode (LED), an organic light-emitting diode (OLED) or other suitable light-emitting element.

FIG. 2B is an enlarged schematic view of the light-emitting element 106 of FIG. 2A, wherein the light-emitting element 106 is exemplified by a light-emitting diode. 2B, the light emitting element 106 includes a first semiconductor layer 106a, a light emitting layer 106b, a second semiconductor layer 106c, a first electrode 106d, a second electrode 106e, and an insulating layer 106f, wherein the light emitting element 106 is, for example, a first electrode 106d. The second electrode 106e is electrically connected to the circuit layer 107 on the substrate 102. The structure of the light-emitting element 106 is well known to those skilled in the art. Therefore, no more descriptions are made.

Referring again to FIG. 1 and FIG. 2A, the area A1 occupied by each pixel region U is about 400 μm ² to 1 mm ² . The area A2 occupied by each of the light-emitting elements 106 is about 100 μm ² to 0.1 mm ² , and the light-emitting element 106 is substantially an element having a low light transmittance, and thus the transparency is low. The area occupied by the above area A1 and the area A2 can be referred to FIG. In the present embodiment, the ratio of A2 to A1 is 50% or less. In other words, in each of the pixel regions U, the area A2 occupied by the light-emitting elements 106 having low transparency is only 50% or less of the area A1 of the pixel area U, and therefore, most of the areas in the pixel area U can maintain high light penetration. The transmittance further increases the transparency of the display panel 100a. In another embodiment, the ratio of A2 to A1 is from 0.01% to 25%.

The display panel 100a further includes a diffusion adhesive 108. In the present embodiment, the diffusion adhesive 108 is disposed in the pixel region U, and the diffusion adhesive 108 covers the light emitting element 106. The diffusion glue 108 is formed, for example, by a plurality of diffusion particles dispersed in a transparent colloid. The diffusion particles in the diffusion gel 108 help to conduct the light of the light-emitting element 106 to each of the pixel regions U. Therefore, the light-conducting function of the diffusion gel 108 contributes to the uniform uniform luminance of the pixel region U as a whole.

The display panel 100a further includes a cover layer 110. The cover layer 110 covers the mesh shading pattern 104 and the diffusion glue 108. The cover layer 110 can be used to protect various components in the display panel 100a, thereby reducing the probability that the display panel 100a is damaged.

Other embodiments will be enumerated below, and the same or similar elements will be denoted by the same symbols. Further, a top view of the following various embodiments can be referred to FIG. 3 is a partial cross-sectional view of a display panel according to a second embodiment of the present disclosure Figure. Referring to FIG. 1 and FIG. 3, the display panel 100b is substantially similar to the display panel 100a of FIG. 2A, except that the display panel 100b further includes an optical adhesive 112. The optical adhesive 112 is, for example, a transparent colloid having a certain degree of light transmittance, which may have the same material as the transparent colloid used for the diffusion adhesive 108, wherein the optical adhesive 112 is included because the diffusion adhesive 108 further includes a plurality of diffusion particles. The light transmittance is higher than the overall light transmittance of the diffusion gel 108. Of course, the disclosure is not limited thereto. The material of the optical adhesive 112 may be different from the material of the transparent colloid of the diffusion adhesive 108. Since the light transmittance of the optical adhesive 112 is greater than the light transmittance of the diffusion adhesive 108, the transparency of the display panel 100b can be further improved.

In the present embodiment, the area A3 occupied by the diffusion adhesive 108 is 200 μm ² to 0.5 mm ² , and the ratio of A3 to A1 is 6% to 65%. Specifically, high-resolution full (Full HD) display, for example, the size of the pixel region U (630x630) μm ^2, the size of the light emitting element 106 can provide the display μm ² when the desired luminance (20x20). According to the retinal screen criterion, the optimal ratio is related to the pitch of the pixel area U. For a viewing distance of 40 cm, when the distance between the two spots is less than 116 μm, the human eye cannot distinguish the two lights. Point (known as the retina screen). At this time, the ratio of A3 to A1 is preferably 65% (((630-116)/630) ² ≒ 65%). When the viewing distance is 1 m, when the distance between the two spots is less than 291 μm, the human eye cannot distinguish the two spots. At this time, the ratio of A3 to A1 is preferably 28% ((630-291) /630) ² ≒ 28%).

4 is a partial cross-sectional view showing a display panel according to a third embodiment of the present disclosure. Referring to FIG. 1 and FIG. 4, the display panel 100c is substantially similar to the display panel 100a of FIG. 2A, except that the light-emitting element 106 of the display panel 100c is partially provided. Placed in the mesh shading pattern 104. In other words, the light-emitting element 106 is partially embedded in the mesh-shaped light-shielding pattern 106. The mesh shading pattern 104 covers the light emitting element 106 and exposes the side 106s of the light emitting element 106. In the present embodiment, the light-emitting element 106 is provided with a light source in a side-emitting manner. Specifically, when the mesh-shaped light-shielding pattern 104 covers the light-emitting element 106 to cause the light-emitting element 106 to emit light from the side 106s, the light-emitting element 106 may be further provided with a reflective material, and the reflective material is disposed, for example, on the light-emitting element 106 and the mesh shading. The patterns 104 are mainly emitted by the side edges 106s after the light is reflected by the reflective material.

When the mesh-shaped light-shielding pattern 104 completely covers the light-emitting surface other than the side 106s of the light-emitting element 106, the area A2 occupied by the light-emitting element 106 is substantially zero, so the ratio of A2 to A1 is substantially zero. Moreover, the disclosure is not limited thereto. The mesh shading pattern 104 may also only partially cover the light emitting element 106, and thus the mesh shading pattern 104 may expose a light emitting surface other than the side 106s of the light emitting element 106. Here, the area A2 occupied by the light-emitting element 106 is substantially not zero.

FIG. 5 is a partial cross-sectional view showing a display panel according to a fourth embodiment of the present disclosure. Referring to FIGS. 1 and 5, the display panel 100d is substantially similar to the display panel 100a of FIG. 2A, except that three light-emitting elements are disposed in the pixel area U of the display panel 100d. Specifically, the light emitting elements 106x, 106y, 106z are stacked on each other and each of the light emitting elements is at least partially exposed. For example, since the light emitting element 106y is stacked on the light emitting element 106z, the light emitting element 106z is only partially exposed. Similarly, since the light emitting element 106x is stacked on the light emitting element 106y, the light emitting element 106y is only partially exposed. In addition, the light-emitting element 106x is completely violent Exposed. In this embodiment, the light-emitting elements 106x, 106y, and 106z are red light-emitting elements, green light-emitting elements, and blue light-emitting elements, respectively, and the same pixel area U can display three different colors, so the display panel 100d has a higher Resolution. Of course, the disclosure is not limited thereto, and those skilled in the art can design the color of the light-emitting component by themselves according to requirements. The light-emitting element 106x, the light-emitting element 106y, and the light-emitting element 106z are electrically connected to the wiring layer 107 of the substrate 102 through the conductive via 107v.

FIG. 6 is a partial cross-sectional view showing a display panel according to a fifth embodiment of the present disclosure. Referring to FIGS. 1 and 6, the display panel 100e is substantially similar to the display panel 100d of FIG. 5, except that a plurality of light-emitting elements 106x, 106y, 106z separated from each other are disposed in the pixel area U of the display panel 100e. Specifically, the light-emitting elements 106x, 106y, 106z are, for example, disposed apart from each other, and each of the light-emitting elements is completely exposed. In this embodiment, the light-emitting elements 106x, 106y, and 106z are red light-emitting elements, green light-emitting elements, and blue light-emitting elements, respectively, and the same pixel area U can display three different colors, so the display panel 100d has a higher Resolution. Of course, the disclosure is not limited thereto, and those skilled in the art can design the color of the light-emitting component by themselves according to requirements.

FIG. 7 is a partial cross-sectional view showing a display panel according to a sixth embodiment of the present disclosure. Referring to FIG. 1 and FIG. 7 , the display panel 100 f is substantially similar to the display panel 100 c of FIG. 4 , except that the display panel 100 f further includes a plurality of solar cells 120 , and the solar cell 120 is electrically connected to the circuit layer 107 . Specifically, at least one solar cell 120 is disposed in each of the pixel regions U, and the solar cell 120 itself has a certain degree of light transmittance. In addition, when the solar cell 120 operates to absorb light, It can reduce the degree of direct light penetration, so that the control of the gray scale can be realized, so that the display panel 100f can have better dark picture display quality. In addition, the solar cell 120 can generate electric energy after absorbing light, and the electric energy can be supplied to the light-emitting element 106 of the display panel 100f after being processed, and the energy required to be additionally supplied to the display panel 100f can be reduced. In addition, the present embodiment is described by taking the solar cell 120 to the display panel 100c as an example. However, the disclosure is not limited thereto. In other embodiments, solar cell 120 can also be incorporated into the design of display panels 100a and 100b.

FIG. 8 is a partial cross-sectional view showing a display panel according to a seventh embodiment of the present disclosure. Referring to FIG. 1 and FIG. 8 , the display panel 100 g is substantially similar to the display panel 100 d of FIG. 6 , except that the display panel 100 g further includes a plurality of solar cells 120 , and the solar cell 120 is electrically connected to the circuit layer 107 . Each of the pixel areas U is provided with at least one solar cell 120, and light-emitting elements 106x, 106y, 106z stacked on each other are disposed on the solar cell 120, and thus the light-emitting elements 106x, 106y, 106z and the solar cell 120 are stacked on each other. In the present embodiment, the light-emitting elements 106x, 106y, 106z are stacked on top of the solar cell 120, and the present disclosure does not limit the stacking order of the light-emitting elements 106x, 106y, 106z and the solar cell 120. Further, in other embodiments, the light-emitting elements 106x, 106y, 106z stacked on each other may also be disposed separately from the solar cells 120. In other words, the light-emitting elements 106x, 106y, 106z are not stacked with each other with the solar cell 120.

FIG. 9 is a partial cross-sectional view showing a display panel according to an eighth embodiment of the present disclosure. Referring to FIG. 1 and FIG. 9, the display panel 100h is substantially similar to the display panel 100e of FIG. 6, except that the display panel 100h further includes a plurality of solar cells. 120. The solar cell 120 is electrically connected to the circuit layer 107. At least one solar cell 120 is disposed in each of the pixel areas U. The light-emitting elements 106x, 106y, 106z separated from each other and the solar cells are separated from each other and are not stacked on each other. In addition, in other embodiments, the light emitting elements 106x, 106y, 106z separated from each other may also be stacked with the solar cell 120, wherein all of the light emitting elements may be disposed on the solar cell 120, or a part of the light emitting elements may be disposed at On the solar cell 120.

FIG. 10 is a partial cross-sectional view showing a display panel according to a ninth embodiment of the present disclosure. Referring to FIG. 1 and FIG. 10, the display panel 100i is substantially similar to the display panel 100h of FIG. 9, except that each pixel area U of the display panel 100i is provided with three solar cells, namely, solar cells 120a, 120b, and 120c. . The light-emitting elements 106x, 106y, and 106z are disposed on the solar cells 120a, 120b, and 120c, respectively. In addition, the display panel 100i further includes a color filter pattern 130. The color filter pattern 130 covers the light emitting elements 106x, 106y, 106z and the solar cells 120a, 120b, 120c. The color filter pattern 130 includes first filter patterns 130a, 130b, 130c, wherein the first filter patterns 130a, 130b, 130c are, for example, a red light filter pattern, a green light filter pattern, and a blue light filter pattern, respectively. The first filter patterns 130a, 130b, 130c cover the light emitting elements 106x, 106y, 106z and the solar cells 120a, 120b, 120c, respectively.

As shown in FIG. 10, the solar cells 120a, 120b, and 120c and the light-emitting elements 106x, 106y, and 106z are electrically connected to the third electrode 140. When the solar cells 120a, 120b, 120c are in operation, the solar cells 120a, 120b, 120c may respectively absorb light that has passed through the first filter patterns 130a, 130b, 130c to generate electrical energy. In other words, the solar cells 120a, 120b, 120c can respectively sense red, green, and blue light. The light rays also generate electrical signals, so the display panel 100i further has a function of color image sensing, such as a function of color scanning.

11 is a partial cross-sectional view showing a display panel according to a tenth embodiment of the present disclosure. Referring to FIG. 1 and FIG. 11 , the display panel 100 j is similar to the display panel 100 f of FIG. 7 , except that the display panel 100 j further includes a plurality of electrochromic material layers 122 . At least one layer of electrochromic material 122 is disposed in each pixel region U. The electrochromic material layer 122 is disposed on the solar cell 120, and the electrochromic material layer 122 and the solar cell 120 together form an electrochromic cell 124.

Specifically, the electrochromic cell 124 is provided, for example, on a transparent electrode of the solar cell 120 with a layer 122 of electrochromic material, such as a substantially transparent tungsten oxide (WO ₃ ) film, and the solar cell 120 is, for example, a dye. A sensitized solar cell containing a lithium ion solid electrolyte. When the electrochromic battery 124 absorbs light and is in an open state with an external circuit, the current generated by the solar cell 120 is injected into the tungsten oxide film to oxidize the tungsten oxide to form a colored lithium tungsten bronze (Li _x WO ₃ ). . Thereafter, when the electrochromic battery 124 is in communication with the external circuit, the lithium tungsten bronze will be reduced to form transparent tungsten oxide. In this way, the gray scale control of the display panel 100j can be realized by controlling the presence or absence of the color of the electrochromic battery 124, so that the display panel 100j has good display quality. In addition, those skilled in the art can design the configuration relationship of the electrochromic material layer 122 and the solar cell 120 according to requirements. The disclosure does not limit that the electrochromic material layer 122 must be disposed on the surface of the solar cell 120. In other words, as long as the current of the solar cell 120 can be injected into the electrochromic material layer 122 to control the color of the electrochromic material layer 122, it is within the scope of the disclosure.

FIG. 12 is a partial cross-sectional view showing a display panel according to an eleventh embodiment of the present disclosure. Referring to FIGS. 1 and 12 , the display panel 100 k is substantially similar to the display panel 100 j of FIG. 11 except that the electrochromic battery 124 of the display panel 100 k is disposed on the cover layer 110 .

In summary, in the display panel of the present disclosure, the ratio of the area of the light-emitting element to the area of the pixel area is relatively low, so that the transparency of the display panel can be improved. In addition, the display panel of the present disclosure is provided with a solar cell, and the gray scale control of the display panel can be realized when the solar cell operates to absorb light to have better dark picture display quality.

100a‧‧‧ display panel

102‧‧‧Substrate

104‧‧‧ mesh shade pattern

106‧‧‧Lighting elements

107‧‧‧Line layer

108‧‧‧Development glue

110‧‧‧ Coverage

Area of the A1‧‧‧ pixel area

A2‧‧‧ area of light-emitting elements

Claims (21)

A display panel includes: a substrate; a mesh shielding pattern disposed on the substrate to define a plurality of pixel regions on the substrate; and a plurality of light emitting elements disposed on the substrate, each of the pixel regions At least one light emitting element is disposed, wherein an area of each of the pixel regions is A1, an area of the at least one light emitting element is A2, and a ratio of A2 to A1 is 50% or less. The display panel according to claim 1, wherein the ratio of A2 to A1 is 0.01% to 25%. The display panel of claim 1, further comprising a diffusion adhesive disposed in one of the pixel regions, the diffusion adhesive covering the at least one light-emitting element in the pixel region. The display panel of claim 3, further comprising an optical glue disposed in one of the pixel regions, wherein the diffusion adhesive has an area of A3, and a ratio of A3 to A1 is 6% to 65%. The display panel of claim 1, wherein any one of the light-emitting elements is embedded in the mesh-shaped light-shielding pattern, and the mesh-shaped light-shielding pattern exposes at least one side of the light-emitting element. The display panel of claim 1, wherein a plurality of light-emitting elements stacked on each other are disposed in each of the pixel regions. The display panel of claim 1, wherein each of the pixel regions A plurality of light emitting elements separated from each other are disposed in the domain. A display panel includes: a substrate; a mesh shielding pattern disposed on the substrate to define a plurality of pixel regions on the substrate; a plurality of light emitting elements disposed on the substrate; and a plurality of solar cells, And disposed on the substrate, wherein each of the pixel regions is provided with at least one light emitting element and at least one solar cell. The display panel of claim 8, further comprising a diffusion adhesive disposed in one of the pixel regions, the diffusion adhesive covering the at least one light-emitting element in the pixel region. The display panel of claim 9, further comprising an optical glue disposed in one of the pixel regions. The display panel of claim 8, wherein any one of the light-emitting elements is embedded in the mesh-shaped light-shielding pattern, and the mesh-shaped light-shielding pattern exposes at least one side of the light-emitting element. The display panel of claim 8, wherein the at least one light emitting element is a plurality of light emitting elements stacked on each other. The display panel of claim 12, wherein the light-emitting elements stacked on each other and the at least one solar cell are stacked on each other. The display panel of claim 12, wherein the light-emitting elements stacked on each other and the at least one solar cell are separated from each other. The display panel of claim 8, wherein the at least one light emitting element is a plurality of light emitting elements separated from each other. The display panel of claim 15, wherein the light-emitting elements separated from each other and the at least one solar cell are stacked on each other. The display panel of claim 15, wherein the light-emitting elements separated from each other and the at least one solar cell are separated from each other. The display panel of claim 8, further comprising a color filter pattern covering the at least one light emitting element and the at least one solar cell. The display panel of claim 8, wherein each of the pixel regions is further provided with at least one layer of electrochromic material. The display panel of claim 19, wherein the at least one electrochromic material layer is disposed on the at least one solar cell to constitute at least one electrochromic cell. The display panel of claim 20, further comprising a cover layer covering the mesh shading pattern, the at least one electrochromic battery being disposed on the cover layer.