TWI657577B - Pixel array substrate - Google Patents

Abstract

A pixel array substrate includes a plurality of sub pixels. The plurality of sub pixels include a first color sub pixel, a second color sub pixel, and a third color sub pixel. The pixel openings of the first color sub-pixel and the pixel openings of the second-color sub-pixel are alternately arranged in a row in the first direction. The pixel openings of the third color sub-pixel are arranged in the next row in a direction parallel to the first direction. The pixel openings of the first color sub-pixel, the pixel openings of the second color sub-pixel, and the pixel openings of the third color sub-pixel are adjacent to each other. The distance in the first direction between the edge of the pixel opening of the first color sub-pixel and the edge of the pixel opening of the second color sub-pixel is L1. The width of the pixel opening of the third color sub-pixel in a direction parallel to the first direction is W3. L1> W3.

Description

Pixel array substrate

The present invention relates to a substrate, and more particularly, to a pixel array substrate.

Recently, environmental awareness has risen, and flat-panel displays with low power consumption, good space utilization efficiency, no radiation, and high image quality have become mainstream in the market. Common flat displays include liquid crystal displays, plasma displays, organic electroluminescence displays, and the like. Taking an organic electroluminescence display as an example, it is a self-luminous display, which does not require a backlight module, so the manufacturing cost of the backlight module and the energy consumed by the backlight module itself can be saved. In addition, since the organic electroluminescence display has no viewing angle problem, and has the characteristics of full color and high response speed, the organic electroluminescence display is a flat display with both performance and environmental protection.

The organic electroluminescent display includes a pixel array substrate. Generally, the manufacturing process of a pixel array substrate includes forming a film layer such as a pixel electrode (or anode), a pixel definition layer, an organic electroluminescence pattern, and a counter electrode (or cathode) on the substrate. The production of organic electroluminescence patterns is mostly performed by using a mask with openings and evaporation. The size and position of the openings will determine the distribution range of the organic electroluminescence pattern. However, when the openings of the mask and the substrate with the pixel definition layer are not aligned well, part of the organic electroluminescence pattern is easily formed in the pixel openings of the wrong pixel definition layer, thereby causing color mixing problems.

The invention provides a pixel array substrate, which can form an organic electroluminescence display with high performance by using the pixel array substrate.

The pixel array substrate of the present invention includes a substrate and a plurality of sub-pixels disposed on the substrate. Each sub-pixel includes an active element, a pixel electrode electrically connected to the active element, a pixel definition layer disposed on the pixel electrode, and an organic electroluminescence pattern. The pixel definition layer has a pixel opening overlapping the pixel electrode. The organic electroluminescence pattern is disposed at the pixel opening. The plurality of sub pixels include a plurality of first color sub pixels, a plurality of second color sub pixels, and a plurality of third color sub pixels. The plurality of pixel openings of the plurality of first color sub-pixels and the plurality of pixel openings of the plurality of second-color sub-pixels are alternately arranged in a row in the first direction. The plurality of pixel openings of the plurality of third color sub-pixels are aligned in a row in a direction parallel to the first direction. One pixel opening of a plurality of first color sub-pixels, one pixel opening of a plurality of second-color sub-pixels, and one pixel opening of a plurality of third-color sub-pixels Adjacent to each other, the distance between the edge of the pixel opening of the first color sub-pixel and the edge of the pixel opening of the second color sub-pixel in the first direction is L1, and the pixel opening of the third-color sub-pixel is at The width in a direction parallel to the first direction is W3, and L1> W3.

In an embodiment of the present invention, the two reference lines respectively pass through the edge of the pixel opening of the first color sub-pixel and the edge of the pixel opening of the second color sub-pixel, and the reference line is perpendicular to the first direction. , And the pixel opening of the third color sub-pixel is located within an area between the plurality of reference lines.

In an embodiment of the present invention, the pixel opening of the third color sub-pixel is not aligned with the pixel opening of the first color sub-pixel in the second direction, and the pixel opening of the third color sub-pixel is The pixel openings of the second color sub-pixels are not aligned in the second direction, and the first direction is perpendicular to the second direction.

In an embodiment of the present invention, the width of the pixel opening of the first color sub-pixel in the first direction is W1, and the width of the pixel opening of the second-color sub-pixel in the first direction is W2. , L1> W1, and L1> W2.

In an embodiment of the present invention, the width of the pixel opening of the first color sub-pixel in the first direction is W1, and the width of the pixel opening of the second-color sub-pixel in the first direction is W2. , W3> W1, and W3> W2.

In an embodiment of the present invention, the width of the pixel opening of the first color sub-pixel in the first direction is W1, and the width of the pixel opening of the second-color sub-pixel in the first direction is W2. And W2> W1.

In an embodiment of the present invention, the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are respectively used to emit a first color light, a second color light, and a third color light, and the first The one-color light, the second-color light, and the third-color light include red light, green light, and blue light.

In an embodiment of the present invention, the pixel definition layer has a bottom surface close to the substrate, a top surface remote from the substrate, and a sidewall, wherein the sidewall is connected between the bottom surface and the top surface.

In an embodiment of the present invention, the edge of the pixel opening refers to the boundary between the sidewall of the pixel definition layer and the bottom surface of the pixel definition layer.

Based on the above, a pixel array substrate according to an embodiment of the present invention has a layout of L1> W3. In the case of L1> W3, when an organic electroluminescence material for emitting a specific color light is formed on a pixel definition layer of a pixel array substrate by using an evaporation mask, the organic electroluminescence pattern is not easily formed on the wrong pixel Opening can improve the color mixing problem.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic cross-sectional view of a pixel array substrate according to an embodiment of the present invention. FIG. 2 is a schematic top view of a pixel array substrate according to an embodiment of the present invention. Fig. 1 corresponds to a section line A-A 'and a section line B-B' of Fig. 2. For the sake of clear description, FIG. 2 omits the illustration of the counter electrode 160 and the isolation structure 170 of FIG. 1, and FIG. 1 and FIG. 2 depict the xyz rectangular coordinate system, in which the directions x, y, and z are perpendicular to each other.

1 and FIG. 2, the pixel array substrate 100 includes a substrate 110 and a plurality of sub-pixels SP disposed on the substrate 110. The substrate 110 is mainly a component for carrying the pixel array substrate 100. For example, in this embodiment, the material of the substrate 110 may be glass, quartz, organic polymers, or opaque / reflective materials (eg, conductive materials, wafers, ceramics, or other applicable materials). , Or other applicable materials.

Each sub-pixel SP includes an active device T, a pixel electrode 130, a pixel definition layer 140, and an organic electroluminescent pattern 150. The pixel electrode 130 is electrically connected to the active device T. The pixel definition layer 140 is disposed on the pixel electrode 130 and has a pixel opening 142 overlapping the pixel electrode 130. The organic electroluminescent pattern 150 is disposed on the pixel opening 142. In this embodiment, the pixel array substrate 100 may optionally include an insulating layer 120 that covers the active element T and the substrate 110. The insulating layer 120 has a contact window 122 that overlaps with a portion of the active element T, and the pixels are The electrode 130 can be electrically connected to the active device T through the contact window 122 of the insulating layer 120. However, the present invention is not limited to this. In other embodiments, the pixel electrode 130 may be electrically connected to the active device T by other methods. In addition, in this embodiment, the pixel array substrate 100 may optionally further include an isolation structure 170 disposed on the pixel definition layer 140 to isolate adjacent organic electroluminescent patterns 150.

The pixel definition layer 140 may also be referred to as an intermediate dielectric layer. The material of the pixel definition layer 140 is an insulating material. For example, in this embodiment, the material of the pixel definition layer 140 may be an inorganic material (for example, silicon oxide, silicon nitride, silicon oxynitride, or a stacked layer of at least two materials mentioned above), an organic material, or the foregoing. Of combination.

In this embodiment, each sub-pixel SP may further include a counter electrode 160, and the organic electroluminescent pattern 150 is disposed between the counter electrode 160 and the pixel electrode 130. The counter electrode 160 and the organic electroluminescent pattern 150 and the pixel electrode 130 may form an organic light emitting diode OLED. For example, in this embodiment, the active element T for driving an organic light emitting diode OLED may include a driving transistor (not shown), a selection transistor (not shown), and a capacitor (not shown). The first terminal of the driving transistor is coupled to a power line (not shown) with a high voltage level, and the second terminal of the driving transistor is coupled to the input terminal of an organic light emitting diode OLED (for example, a pixel electrode). 130), the output terminal of the organic light emitting diode OLED (for example, the counter electrode 160) is coupled to the ground terminal, the second terminal of the transistor is selected to be connected to the control terminal of the driving transistor, and the first terminal of the transistor is selected Coupled to a data line (not shown) with a pixel signal, the control terminal of the selection transistor is coupled to a scan line (not shown) with a scanning signal, and the first end of the capacitor is coupled to the control of the driving transistor And the second terminal of the selection transistor, and the second terminal of the capacitor is coupled to the ground terminal. In short, in this embodiment, a circuit structure of two transistors and one capacitor (2T1C) can be used to drive the organic light emitting diode OLED. However, the present invention is not limited to this. In other embodiments, 1T1C, 3T1C, 3T2C, 4T1C, 4T2C, 5T1C, 5T2C, 6T1C, 6T2C, 7T2C, or other appropriate circuit architectures can be used to drive organic light-emitting diode OLEDs. .

In this embodiment, at least one of the counter electrode 160 and the pixel electrode 130 is a light transmitting electrode. For example, if the organic electroluminescent display using the pixel array substrate 100 is an upward-emission type, the counter electrode 160 may be a light-transmitting electrode and the pixel electrode 130 may be a reflective electrode; if the pixel array substrate 100 is used The organic electroluminescence display is a downward emission type, so the counter electrode 160 may be a reflective electrode, and the pixel electrode 130 may be a light-transmitting electrode. If the organic electroluminescence display using the pixel array substrate 100 is a double-sided display For the light-emitting type, the counter electrode 160 and the pixel electrode 130 may both be transparent electrodes. For example, the material of the transparent electrode includes metal oxides, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, other suitable oxides, or A layer of at least two of the foregoing; the material of the reflective electrode may be metal or other suitable materials, but the invention is not limited thereto.

The plurality of sub pixels SP include a plurality of first color sub pixels SP1, a plurality of second color sub pixels SP2, and a plurality of third color sub pixels SP3. Each of the first color sub-pixels SP1 includes an active element T, a pixel electrode 130, a pixel definition layer 140, and an organic electroluminescent pattern 150R. The pixel electrode 130 is electrically connected to the active element T, and the pixel definition layer 140. The pixel electrode 130 is provided on the pixel electrode 130 and has a pixel opening 142R overlapping the pixel electrode 130. The organic electroluminescent pattern 150R is provided on the pixel opening 142R. Each second color sub-pixel SP2 includes an active element T, a pixel electrode 130, a pixel definition layer 140, and an organic electroluminescent pattern 150G. The pixel electrode 130 is electrically connected to the active element T and the pixel definition layer 140. The pixel electrode 130 is provided on the pixel electrode 130 and has a pixel opening 142G overlapping the pixel electrode 130. An organic electroluminescent pattern 150G is provided on the pixel opening 142G. Each third color sub-pixel SP3 includes an active element T, a pixel electrode 130, a pixel definition layer 140, and an organic electroluminescent pattern 150B. The pixel electrode 130 is electrically connected to the active element T and the pixel definition layer 140. The pixel electrode 130 is provided on the pixel electrode 130 and has a pixel opening 142B overlapping the pixel electrode 130. The organic electroluminescent pattern 150B is provided on the pixel opening 142B.

The organic electroluminescent pattern 150R of the first color sub-pixel SP1, the organic electroluminescent pattern 150G of the second color sub-pixel SP2, and the organic electroluminescent pattern 150B of the third color sub-pixel SP3 are used to emit different The first color light, the second color light, and the third color light. For example, in this embodiment, the first color light, the second color light, and the third color light may be red light, green light, and blue light, respectively, but the present invention is not limited thereto.

The pixel openings 142R of the plurality of first color sub-pixels SP1 and the pixel openings 142G of the plurality of second-color sub-pixels SP2 are alternately arranged in a row R _N in the direction x. The plurality of pixel openings 142B of the plurality of third color sub-pixels SP3 are aligned in the next row R _{N + 1} in a direction parallel to the direction x. For example, in this embodiment, the plurality of pixel openings 142R of the plurality of first color sub-pixels SP1, the plurality of pixel openings 142G of the plurality of second-color sub-pixels SP2, and the plurality of third color sub-pixels The pixel openings 142B of the pixel SP3 are arranged in multiple columns of R _N , R _{N + 1} , R _{N + 2} , and R _{N + 3} , where each even-numbered column R _N , R _{N + 2} (or odd-numbered column R _{N +1} , R _{N + 3} ) includes a plurality of pixel openings 142R and a plurality of pixel openings 142G that are alternately arranged in the direction x, and each odd-numbered column R _{N + 1} , R _{N + 3} (or even-numbered column R _N , R _{N + 2} ) include a plurality of pixel openings 142B arranged in the direction x.

In this embodiment, a first color sub-pixel SP1, a second color sub-pixel SP2, and a third color sub-pixel SP3 adjacent to each other form a pixel P, and the first color sub-pixel SP1 The pixel opening 142R, the pixel opening 142G of the second color sub-pixel SP2, and the pixel opening 142B of the third-color sub-pixel SP3 are adjacent to each other, and the edge 142Rs of the pixel opening 142R of the first-color sub-pixel SP1 ( The distance between the edge 142Gs (labeled in Figure 2) of the second color sub-pixel SP2 and the pixel opening 142G (labeled in Figure 2) of the second color sub-pixel SP2 in the direction x is L1. The width in the direction x parallel is W3, and L1> W3.

The pixel definition layer 140 has a bottom surface 140a close to the substrate 110, a top surface 140b far from the substrate 110, and a side wall 140c defining the pixel opening 142. The side wall 140c is connected between the bottom surface 140a and the top surface 140b. In this embodiment, the edge 142Rs of the pixel opening 142R refers to the boundary between the side wall 140c defining the pixel opening 142R and the bottom surface 140a of the pixel defining layer 140, and the edge 142Gs of the pixel opening 142G refers to the boundary defining the pixel opening 142G. The boundary between the sidewall 140c and the bottom surface 140a of the pixel definition layer 140, and the distance L1 refers to the shortest distance between the edge 142Rs and the edge 142Gs in the direction x. On the other hand, in this embodiment, the width W3 refers to the bottom of the pixel opening 142B (that is, the boundary between the side wall 140c defining the pixel opening 142B and the bottom surface 140a of the pixel defining layer 140) in the direction of the parallel direction x Minimum width.

In the embodiment of FIG. 2, the shape of the pixel opening 142R, the pixel opening 142G, and the pixel opening 142B is rectangular. However, the present invention is not limited to this. In other embodiments, the pixel opening 142R, the pixel opening 142G, and the pixel opening 142B may be designed into other suitable shapes.

It is worth mentioning that in the case of L1> W3, when an organic electroluminescence material for emitting a specific color light is formed on the pixel definition layer 140 by using an evaporation mask, the organic electroluminescence pattern is not easily formed in an error. The pixels are open, which can improve the color mixing problem. For example, an evaporation mask (not shown) has openings corresponding to the organic electroluminescence pattern 150R. In the case of L1> W3, the evaporation mask will be used to emit the first When the electroluminescent material is formed in the pixel definition layer 140, the first organic electroluminescent material is formed in the correct pixel opening 142R, and the first organic electroluminescent material is not easily caused by the evaporation mask and the pixel definition layer 140. Poor alignment is formed in the wrong pixel opening 142G and / or the pixel opening 142B, thereby preventing the current transmitted between the pixel electrode 130 and the counter electrode 160 of the sub-pixel SP1 from passing through the two The above organic electroluminescence pattern further improves the color mixing problem; the evaporation mask has an opening corresponding to 150G of the organic electroluminescence pattern. In the case of L1> W3, the evaporation mask will be used to emit the second color light. When the second organic electroluminescent material is formed in the pixel definition layer 140, the second organic electroluminescent material is formed in the correct pixel opening 142G, and the second organic electroluminescent material is not easily defined by the vapor deposition mask and the pixel. Poor alignment of layer 140 results in the wrong picture In the opening 142R and / or the pixel opening 142B, the current transmitted between the pixel electrode 130 and the counter electrode 160 of the sub-pixel SP2 can be prevented from passing through two or more organic electroluminescent patterns, thereby improving color mixing. Problem; the evaporation mask (not shown) has openings corresponding to the organic electroluminescence pattern 150B. In the case of L1> W3, the third organic electroluminescence used to emit the third color light using the evaporation mask When the material is formed in the pixel definition layer 140, the third organic electroluminescent material is formed in the correct pixel opening 142B, and the third organic electroluminescent material is not easy to be aligned with the pixel definition layer 140 due to the evaporation mask. It is better to form in the wrong pixel opening 142R and / or the pixel opening 142G, thereby preventing the current transmitted between the pixel electrode 130 and the counter electrode 160 of the sub-pixel SP3 from passing through more than two types of organic electricity. Electroluminescence pattern to improve color mixing.

Referring to FIG. 2, in this embodiment, the virtual multiple reference lines RL are perpendicular to the direction x, that is, each virtual multiple reference line RL extends in the direction y. The pixel opening 142R of the first color sub-pixel SP1 has an edge 142Rs near the pixel opening 142G, and the pixel opening 142G of the second color sub-pixel SP2 has an edge 142Gs near the pixel opening 142R. A plurality of reference lines RL pass through Edge 142Rs and edge 142Gs. In the vertical projection direction z, the pixel opening 142B of the third color sub-pixel SP3 is located within an area between the plurality of reference lines RL. The pixel opening 142B of the third color sub-pixel SP3 is misaligned with the pixel opening 142R of the first-color sub-pixel SP1 in the direction y. The pixel opening 142B of the third color sub-pixel SP3 is not aligned with the pixel opening 142G of the second-color sub-pixel SP2 in the direction y. In short, in this embodiment, the pixel openings 142R of the first color sub-pixel SP1, the pixel openings 142G of the second-color sub-pixel SP2, and the pixel openings 142B of the third-color sub-pixel SP3 are respectively located at different locations. OK (or rather, different columns).

The width of the pixel opening 142R in the first color sub-pixel SP1 in the direction x is W1, the width of the pixel opening 142G in the second color sub-pixel SP2 in the direction x is W2, and the width of the pixel opening 142G in the second color sub-pixel SP2 is W2. The width of the pixel opening 142B in a direction parallel to the direction x is W3. The edge 142Rs (labeled in FIG. 2) of the pixel opening 142R of the first color sub-pixel SP1 and the pixel opening of the second color sub-pixel SP2 The distance of the edge 142Gs (labeled in Fig. 2) of the 142G in the direction x is L1. In this embodiment, L1> W1, L1> W2, W3> W2> W1, but the present invention is not limited thereto.

In summary, a pixel array substrate according to an embodiment of the present invention includes a plurality of sub pixels. Each first color sub-pixel includes an active element, a pixel electrode, a pixel definition layer, and an organic electroluminescence pattern, wherein the pixel electrode is electrically connected to the active element, and the pixel definition layer is disposed on the pixel electrode and has The pixel openings overlapping the pixel electrodes are provided with organic electroluminescent patterns. The plurality of sub pixels include a plurality of first color sub pixels, a plurality of second color sub pixels, and a plurality of third color sub pixels. The pixel openings of the first color sub-pixel, the pixel openings of the second-color sub-pixel, and the pixel openings of the third-color sub-pixel of the same pixel are adjacent to each other, and the pixel openings of the first-color sub-pixel are The distance between the edge of the pixel opening of the second color sub-pixel and the edge of the pixel opening of the second color sub-pixel is L1, and the width of the pixel opening of the third-color sub-pixel in a direction parallel to the direction is W3, and L1> W3. Therefore, when an organic electroluminescent material for emitting a specific color light is formed on the pixel definition layer of the pixel array substrate by using an evaporation mask, the organic electroluminescent material is not easily formed in the wrong pixel opening, and thus can be used. Improve color mixing.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

100‧‧‧ pixel array substrate

110‧‧‧ substrate

120‧‧‧ Insulation

122‧‧‧Contact window

130‧‧‧pixel electrode

140‧‧‧ pixel definition layer

140a‧‧‧ Underside

140b‧‧‧Top

140c‧‧‧ sidewall

142, 142R, 142G, 142B‧‧‧Pixel opening

142Rs, 142Gs‧‧‧Edge

150, 150R, 150G, 150B‧‧‧Organic electroluminescence patterns

160‧‧‧ counter electrode

170‧‧‧Isolation structure

A-A ’, B-B’‧‧‧ hatching

P‧‧‧Pixels

OLED‧‧‧Organic Light Emitting Diode

L1‧‧‧Distance

R _N , R _{N + 1} , R _{N + 2} , R _{N + 3} ‧‧‧ columns

RL‧‧‧Reference Line

SP, SP1, SP2, SP3 ‧‧‧ sub pixels

T‧‧‧active element

W1, W2, W3‧‧‧Width

x, y, z‧‧‧ directions

FIG. 1 is a schematic cross-sectional view of a pixel array substrate according to an embodiment of the present invention. FIG. 2 is a schematic top view of a pixel array substrate according to an embodiment of the present invention.

Claims (10)

A pixel array substrate includes: a substrate; and a plurality of sub pixels disposed on the substrate, each of the sub pixels includes: an active element; a pixel electrode electrically connected to the active element; a picture A pixel definition layer is disposed on the pixel electrode and has a pixel opening overlapping the pixel electrode; and an organic electroluminescence pattern is disposed on the pixel opening; wherein the sub-pixels include multiple pixels. A first color sub-pixel, a plurality of second color sub-pixels, and a plurality of third-color sub-pixels, each of the sub-pixels includes one of the first-color sub-pixels, the first One of the two-color sub-pixels and one of the third-color sub-pixels; the pixel openings of the first-color sub-pixels and the pixel openings of the second-color sub-pixels Arranged alternately in a first direction, an organic electroluminescence pattern of the first color sub-pixels and an organic electroluminescence pattern of the second color sub-pixels are The first direction is separated by a distance, and the distance is smaller than that of the first color sub-pixels. The width of the organic electroluminescent pattern in the first direction and the width of the organic electroluminescent pattern of the second color sub-pixel in the first direction; The pixel openings are lined up in a direction parallel to the first direction; one of the first color sub-pixels is one of the pixel openings and the second color sub-pixels are one in a row. The pixel opening and the pixel opening of one of the third color sub-pixels are adjacent to each other, an edge of the pixel opening of the first color sub-pixel and the second color sub-pixel A distance of an edge of the pixel opening in the first direction is L1, a width of the pixel opening of the third color sub-pixel in the direction parallel to the first direction is W3, and L1> W3. The pixel array substrate according to item 1 of the scope of patent application, wherein the two reference lines respectively pass through the edge of the pixel opening of the first color sub-pixel and the pixel opening of the second color sub-pixel. The edge, the reference lines are perpendicular to the first direction, and the pixel opening of the third color sub-pixel is located within the area between the two reference lines. The pixel array substrate according to item 1 of the scope of patent application, wherein the pixel opening of the third color sub-pixel is not aligned with the pixel opening of the first color sub-pixel in a second direction, The pixel opening of the third color sub-pixel is not aligned with the pixel opening of the second color sub-pixel in the second direction, and the first direction is perpendicular to the second direction. The pixel array substrate according to item 1 of the patent application scope, wherein the width of the pixel opening of the first color sub-pixel in the first direction is W1, and the pixel of the second color sub-pixel is the pixel The width of the opening in the first direction is W2, L1> W1, and L1> W2. The pixel array substrate according to item 1 of the patent application scope, wherein the width of the pixel opening of the first color sub-pixel in the first direction is W1, and the pixel of the second color sub-pixel is the pixel The width of the opening in the first direction is W2, W3> W1, and W3> W2. The pixel array substrate according to item 5 of the patent application scope, wherein W2> W1. The pixel array substrate according to item 1 of the scope of the patent application, wherein the first color sub-pixel, the second color sub-pixel, and the third color sub-pixel are used to emit a first color light, a The second color light and a third color light, and the first color light, the second color light, and the third color light include a red light, a green light, and a blue light. The pixel array substrate according to item 1 of the patent application scope, wherein the pixel definition layer has a bottom surface close to the substrate, a top surface remote from the substrate, and a side wall, wherein the side wall is connected to the bottom surface and the top Between faces. The pixel array substrate according to item 8 of the patent application scope, wherein the edge of the pixel opening refers to the boundary between the side wall and the bottom surface of the pixel definition layer. The pixel array substrate according to item 9 of the scope of patent application, wherein the width of the pixel opening of the first color sub-pixel in the first direction is W1, and the pixel of the second color sub-pixel is the pixel The width of the opening in the first direction is W2, L1> W1, and L1> W2.