Display panel and display device

Abstract

The present invention relates to a display panel and a display device. The display panel includes a substrate, a pixel unit, a filter layer, and conductive lines. The substrate includes a pixel region, which includes a first sub-pixel region and a second sub-pixel region. The projection of the pixel unit on the substrate is located in the pixel region. The pixel unit includes a first sub-pixel and a second sub-pixel, which emit non-blue and blue colors, respectively. The projections of the first and second sub-pixels on the substrate are located in the first and second sub-pixel regions, and the first and second sub-pixels in the same pixel unit share a common cathode. The filter layer includes first, second, and fourth filter sections. The projections of the first and second filter sections on the substrate are located in the first sub-pixel region and the region of the pixel region excluding the first sub-pixel region, respectively. The first and second filter sections allow light emitted by the first and second sub-pixels to pass through, respectively. The projection of the conductive line on the substrate is located within the projection of the fourth filter section on the substrate, and the fourth filter section is used to allow light emitted by the second sub-pixel to pass through.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] In the related art, transparent display has always attracted much attention because it has both display and transparency functions and can integrate real objects with virtual information. However, for OLED (Organic Light-Emitting Diode) display panels, since the organic layer materials used in the BP (back plane) process are obviously yellow, the finished display panels also have an undesirable visual effect of yellowing. Especially for flexible transparent display panels, since the substrate glass needs to be replaced with a flexible substrate, the material of the flexible substrate is PI (Polyimide) or CPI (colorless PI, transparent PI), which makes the yellowing index of the flexible substrate greater than 10, which cannot meet the needs of consumers.

[0003] On the other hand, in order to improve the transmittance of the display panel, it is impossible to attach a whole polarizer to the display panel. The reflective material (or reflective material) in the display panel will reflect external light, especially in the case of strong ambient light, which will significantly affect the display effect. Summary of the Invention

[0004] The present invention provides a display panel and a display device to solve the deficiencies in the related art.

[0005] According to a first aspect of an embodiment of the present invention, there is provided a display panel, including:

[0006] A substrate comprising a display area, wherein the display area comprises at least one pixel area and at least one transparent area; the pixel area comprises a first sub-pixel area and a second sub-pixel area;

[0007] at least one pixel unit, wherein the projection of the pixel unit on the substrate is located in the pixel area; the pixel unit includes a first sub-pixel and a second sub-pixel, the first sub-pixel emits a non-blue light color, and the second sub-pixel emits a blue light color; the projection of the first sub-pixel on the substrate is located in the first sub-pixel area, and the projection of the second sub-pixel on the substrate is located in the second sub-pixel area; the first sub-pixel and the second sub-pixel in the same pixel unit share a common cathode;

[0008] a filter layer located on a side of the pixel unit away from the substrate, the filter layer comprising a first filter portion and a second filter portion, wherein a projection of the first filter portion on the substrate is located in the first sub-pixel region, and a projection of the second filter portion on the substrate is located in a region of the pixel region excluding the first sub-pixel region; the first filter portion is configured to allow only light emitted by the first sub-pixel to pass through, and the second filter portion is configured to allow only light emitted by the second sub-pixel to pass through;

[0009] The at least one pixel unit is arrayed along a first direction and a second direction; the first direction intersects the second direction;

[0010] The display panel further includes a cathode connecting portion; the filter layer includes a third filter portion; a projection of the cathode connecting portion on the substrate is located within a projection of the third filter portion on the substrate, and the third filter portion is configured to allow only light emitted by the second sub-pixel to pass through;

[0011] The cathode connecting portion is located between two cathodes adjacent to each other in the first direction, and is used to connect the two cathodes adjacent to each other in the first direction;

[0012] and / or,

[0013] The cathode connecting portion is located between two cathodes adjacent to each other in the second direction, and is used to connect the two cathodes adjacent to each other in the second direction.

[0014] In one embodiment, the first sub-pixel includes a pixel opening area, and a projection of the first filter portion on the first sub-pixel is located in the pixel opening area.

[0015] In one embodiment, the pixel unit includes two first sub-pixels, one of the first sub-pixels is a red sub-pixel, the luminescent color of the red sub-pixel is red, and the other first sub-pixel is a green sub-pixel, the luminescent color of the green sub-pixel is green;

[0016] The pixel area includes two first sub-pixel areas, one of which is a red sub-pixel area, and the other is a green sub-pixel area; the projection of the red sub-pixel on the substrate is located in the red sub-pixel area, and the projection of the green sub-pixel on the substrate is located in the green sub-pixel area;

[0017] The filter layer includes two first filter parts, one of which is a red filter part, and the other is a green filter part. The red filter part is used to allow only the light emitted by the red sub-pixel to pass through, and the green filter part is used to allow only the light emitted by the green sub-pixel to pass through. The projection of the red filter part on the substrate is located in the red sub-pixel area, and the projection of the green filter part on the substrate is located in the green sub-pixel area.

[0018] In one embodiment, the display panel further includes a driving circuit layer, the driving circuit layer includes a wire, and the wire is located between the substrate and the pixel unit; the material of the wire is metal;

[0019] The filter layer includes a fourth filter portion; a projection of the wire on the substrate is located within a projection of the fourth filter portion on the substrate, and the fourth filter portion is configured to allow only light emitted by the second sub-pixel to pass through.

[0020] In one embodiment, the conductive lines include any one or any combination of gate lines, data lines, and power lines.

[0021] In one embodiment, the substrate further comprises a peripheral region, the peripheral region at least partially surrounding the display region;

[0022] The conductive lines are located in the display area and / or the peripheral area.

[0023] In one embodiment, it further includes:

[0024] The encapsulation layer is located between the pixel unit and the filter layer.

[0025] In one embodiment, further comprising at least one transparent region;

[0026] The ratio of the total area of ​​all the pixel areas to the total area of ​​all the transparent areas is 1:1 to 1:5;

[0027] The area of ​​one of the pixel areas is the same as the area of ​​one of the transparent areas, and at least one of the pixel areas and at least one of the transparent areas are arranged in an array along a first direction and a second direction; the first direction intersects with the second direction; there is at least one of the transparent areas between two adjacent pixel areas in the first direction, and / or there is at least one of the transparent areas between two adjacent pixel areas in the second direction.

[0028] In one embodiment, the filter layer is made of a low-temperature curing material.

[0029] According to a second aspect of the embodiments of the present invention, a display device is provided, comprising the above-mentioned display panel.

[0030] According to the above embodiment, since the pixel unit includes a first sub-pixel and a second sub-pixel, the first sub-pixel emits a non-blue color, and the second sub-pixel emits a blue color, the projection of the first sub-pixel on the substrate is located in the first sub-pixel region, and the projection of the second sub-pixel on the substrate is located in the second sub-pixel region. The first sub-pixel and the second sub-pixel in the same pixel unit share the same cathode. Moreover, since the filter layer is located on the side of the pixel unit away from the substrate and includes a first filter portion and a second filter portion, the projection of the first filter portion on the substrate is located in the first sub-pixel region, and the projection of the second filter portion on the substrate is located in a region of the pixel region other than the first sub-pixel region, the first filter portion is configured to allow light emitted by the first sub-pixel to pass through, and the second filter portion is configured to allow light emitted by the second sub-pixel to pass through. That is, the second filter portion covers the region of the cathode of the pixel unit other than the light emitting region of the first sub-pixel, and the second filter portion allows blue light emitted by the second sub-pixel to pass through. In this way, the intensity of light reflected from the cathode by external light can be reduced, thereby reducing the reflectivity of the display panel. This can also improve the yellowing phenomenon of the display panel, thereby improving the display effect.

[0031] Furthermore, the projection of the conductive line on the substrate lies within the projection of the fourth filter on the substrate, and the fourth filter is configured to allow light emitted by the second sub-pixel to pass through. This reduces the intensity of light reflected from the conductive line, lowers the reflectivity of the display panel, and improves the yellowing effect of the display panel, thereby enhancing the display quality.

[0032] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0034] Figure 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;

[0035] Figure 2 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

[0036] Figure 3 is a schematic structural diagram of another display panel according to an embodiment of the present invention;

[0037] Figure 4 is a schematic diagram showing a comparison of reflectivity spectra of a display panel according to an embodiment of the present invention;

[0038] Figure 5FIG. 4 is a flow chart showing a method for manufacturing a display panel according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. In the following description, when referring to the drawings, like numbers in different figures represent like or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present invention, as detailed in the appended claims.

[0040] An embodiment of the present invention provides a display panel. Figures 1 and 2 As shown, the display panel includes a substrate 11 , at least one pixel unit 12 and a filter layer 13 .

[0041] like Figure 1 As shown, the substrate 11 includes a display area AA, and the display area AA includes at least one pixel area P and at least one transparent area T; the pixel area P includes a first sub-pixel area P1 and a second sub-pixel area P2.

[0042] like Figure 1 As shown, the projection of pixel unit 12 on substrate 11 is located in pixel region P. Pixel unit 12 includes a first sub-pixel 121 and a second sub-pixel 122. The first sub-pixel 121 emits a non-blue color, while the second sub-pixel 122 emits a blue color. The projection of first sub-pixel 121 on substrate 11 is located in first sub-pixel region P1, while the projection of second sub-pixel 122 on substrate 11 is located in second sub-pixel region P2. The first sub-pixel 121 and the second sub-pixel 122 in the same pixel unit 12 share the same cathode 21.

[0043] like Figure 1 As shown, the filter layer 13 is located on the side of the pixel unit 12 away from the substrate 11. The filter layer 13 includes a first filter portion 131 and a second filter portion 132. The projection of the first filter portion 131 on the substrate 11 is located in the first sub-pixel area P1, and the projection of the second filter portion 132 on the substrate 11 is located in the area of ​​the pixel area P except the first sub-pixel area P1. The first filter portion 131 is used to allow only light emitted by the first sub-pixel 121 to pass through, and the second filter portion 132 is used to allow only light emitted by the second sub-pixel 122 to pass through.

[0044] In this embodiment, the pixel unit includes a first sub-pixel and a second sub-pixel, the first sub-pixel emits a non-blue color, and the second sub-pixel emits a blue color. The projection of the first sub-pixel on the substrate is located in the first sub-pixel region, and the projection of the second sub-pixel on the substrate is located in the second sub-pixel region. The first sub-pixel and the second sub-pixel in the same pixel unit share the same cathode. Furthermore, the filter layer is located on a side of the pixel unit away from the substrate and includes a first filter portion and a second filter portion. The projection of the first filter portion on the substrate is located in the first sub-pixel region, and the projection of the second filter portion on the substrate is located in a region of the pixel region excluding the first sub-pixel region. The first filter portion is configured to transmit only light emitted by the first sub-pixel, and the second filter portion is configured to transmit only light emitted by the second sub-pixel. That is, the second filter portion covers the region of the cathode of the pixel unit excluding the light emitting region of the first sub-pixel, and the second filter portion only transmits blue light emitted by the second sub-pixel. In this manner, the intensity of light reflected from the cathode by external light can be reduced, thereby reducing the reflectivity of the display panel. This can also improve the yellowing effect of the display panel and enhance the display quality.

[0045] The display panel provided by the embodiment of the present invention is briefly introduced above. The display panel provided by the embodiment of the present invention is introduced in detail below.

[0046] An embodiment of the present invention provides a display panel. Figures 1 to 3 As shown, the display panel includes a substrate 11 , a driving circuit layer 14 , at least one pixel unit 12 , a cathode connecting portion 22 , an encapsulation layer 15 and a filter layer 13 .

[0047] In this embodiment, if Figure 1 As shown, the substrate 11 includes a display area AA and a peripheral area NA. The peripheral area NA at least partially surrounds the display area AA. For example, the peripheral area NA surrounds the display area AA from four sides, or the peripheral area NA surrounds the display area AA from three sides.

[0048] In this embodiment, the substrate 11 is a flexible substrate, and the material of the flexible substrate can be organic materials such as polyimide (PI) and CPI. In another embodiment, the substrate 11 is a rigid substrate, and the material of the rigid substrate can be, for example, glass, metal, plastic, etc.

[0049] In this embodiment, if Figures 1 to 3As shown, the display area AA includes at least one pixel area P and at least one transparent area T. The area of ​​one pixel area P is the same as the area of ​​one transparent area T. All pixel areas P and all transparent areas T are arranged in an array along a first direction F1 and a second direction F2. The first direction F1 intersects the second direction F2. For example, the first direction F1 is perpendicular to the second direction F2. The first direction F1 can be a row direction, and the second direction F2 can be a column direction.

[0050] In this embodiment, a transparent region T exists between two adjacent pixel regions P in the first direction F1, and a transparent region T exists between two adjacent pixel regions P in the second direction F2. The ratio of the total area of ​​all pixel regions P to the total area of ​​all transparent regions T is 1:3. It should be noted that the ratio of the total area of ​​all pixel regions P to the total area of ​​all transparent regions T is not limited to the aforementioned 1:3; the ratio of the total area of ​​all pixel regions P to the total area of ​​all transparent regions T can range from 1:1 to 1:5. This improves the light transmittance of the display panel.

[0051] In this embodiment, if Figure 1 As shown, the pixel area P includes two first sub-pixel areas P1 and a second sub-pixel area P2. One of the first sub-pixel areas P1 is a red sub-pixel area P11, and the other first sub-pixel area P1 is a green sub-pixel area P12. It should be noted that the red sub-pixel area P11 does not mean that the area is red, and the green sub-pixel area P12 does not mean that the area is green. The red and green here are used to distinguish the two first sub-pixel areas P1.

[0052] In this embodiment, if Figure 2 As shown, the driving circuit layer 14 may include a pixel circuit (not shown) and a wire 23. The wire 23 is located between the substrate 11 and the pixel unit 12, and the material of the wire 23 is metal. The wire 23 may include a data line, a gate line and a power line. Of course, the wire 23 may also include any one or a combination of any two of the data line, the gate line and the power line. Part of the data line is located in the display area AA, and another part of the data line is located in the peripheral area NA. Part of the gate line is located in the display area AA, and another part of the gate line is located in the peripheral area NA. The power line may include a high-level power line and a low-level power line. Part of the high-level power line is located in the display area AA, and another part of the high-level power line is located in the peripheral area NA. The low-level power line is located in the peripheral area NA.

[0053] It should be noted that Figure 2 The wiring in the display panel is only schematically shown in FIG, and does not mean that the wiring in the display panel is only Figure 2 The wires are arranged in the column direction as shown in FIG.

[0054] In this embodiment, the driving circuit layer 14 further includes a planarization layer. The material of the planarization layer is an organic material, for example, the material of the planarization layer may include any one or any combination of polyamide, polyurethane, phenolic resin, polysiloxane, polyimide, polymethyl methacrylate, fluorinated polyimide, and fluorinated polymethyl methacrylate, but is not limited thereto.

[0055] like Figure 2 As shown, all pixel units 12 are arranged in an array along the first direction F1 and the second direction F2. Figure 1 As shown, the projection of the pixel unit 12 on the substrate 11 is located in the pixel region P. The pixel unit 12 includes two first sub-pixels 121 and a second sub-pixel 122. The two first sub-pixels 121 emit non-blue colors, and the second sub-pixel 122 emits blue. Among them, one first sub-pixel 121 is a red sub-pixel 1211, and the red sub-pixel emits red. The other first sub-pixel 121 is a green sub-pixel 1212, and the green sub-pixel emits green. The second sub-pixel 122 can also be called a blue sub-pixel.

[0056] like Figure 1 As shown, in this embodiment, the projection of the first sub-pixel 121 on the substrate 11 is located in the first sub-pixel region P1, and the projection of the second sub-pixel 122 on the substrate 11 is located in the second sub-pixel region P2. Specifically, the projection of the red sub-pixel 1211 on the substrate 11 is located in the red sub-pixel region P11, and the projection of the green sub-pixel 1212 on the substrate 11 is located in the green sub-pixel region P12.

[0057] like Figure 2 As shown, the first sub-pixel 121 and the second sub-pixel 122 in the same pixel unit 12 share the same cathode 21. Specifically, the red sub-pixel 1211, the green sub-pixel 1212, and the blue sub-pixel in the same pixel unit 12 share the same cathode 21, that is, the projection of the same pixel unit 12 on the substrate 11 is located within the projection of the same cathode 21 on the substrate 11, or in other words, the projections of the red sub-pixel 1211, the green sub-pixel 1212, and the blue sub-pixel in the same pixel unit 12 on the substrate 11 are located within the projection of the same cathode 21 on the substrate 11.

[0058] like Figure 2As shown, the same cathode 21 includes a first light emitting area 211, a second light emitting area 212, and a third light emitting area 213. The projection of the red sub-pixel 1211 on the cathode 21 is located in the first light emitting area 211, the projection of the green sub-pixel 1212 on the cathode 21 is located in the second light emitting area 212, and the projection of the blue sub-pixel on the cathode 21 is located in the third light emitting area 213. Light emitted by the red sub-pixel 1211 is emitted from the first light emitting area 211, light emitted by the green sub-pixel 1212 is emitted from the second light emitting area 212, and light emitted by the blue sub-pixel is emitted from the third light emitting area 213.

[0059] like Figure 2 As shown, in this embodiment, the cathode connecting portion 22 is located between two cathodes 21 adjacent in the first direction F1, and is used to connect the two cathodes 21 adjacent in the first direction F1. In another embodiment, the cathode connecting portion 22 may also be located between two cathodes 21 adjacent in the second direction F2, and is used to connect the two cathodes 21 adjacent in the second direction F2. Of course, the cathode connecting portion 22 may be located between both two cathodes 21 adjacent in the first direction F1 and two cathodes 21 adjacent in the second direction F2, and is used to connect the two cathodes 21 adjacent in the first direction F1 and the two cathodes 21 adjacent in the second direction F2.

[0060] In this embodiment, the sub-pixels in each pixel unit 12 share a cathode 21 , and no cathode is provided between two adjacent pixel units 12 , rather than all pixel units 12 sharing a surface electrode. This can improve the light transmittance of the display panel.

[0061] like Figure 1 As shown, the encapsulation layer 15 is located on the side of the pixel unit 12 away from the substrate 11. For example, the encapsulation layer 15 can be prepared using thin film encapsulation technology, including one or more thin films to block water and oxygen. Of course, the encapsulation layer 15 is not limited to the above-mentioned preparation method and structure.

[0062] like Figure 1 and Figure 3 As shown, the filter layer 13 is located on a side of the packaging layer 15 away from the substrate 11. The filter layer 13 includes two first filter portions 131, a second filter portion 132, a third filter portion 133, and a fourth filter portion 134.

[0063] like Figure 1As shown, the projection of the first filter section 131 on the substrate 11 is located in the first sub-pixel region P1. The first filter section 131 is configured to allow only light emitted by the first sub-pixel 121 to pass through. The first sub-pixel 121 includes a pixel opening region (not shown), and the projection of the first filter section 131 on the first sub-pixel 121 is located in the pixel opening region. Specifically, of the two first filter sections 131, one first filter section 131 is a red filter section 1311, and the other first filter section 131 is a green filter section 1312. The red filter section 1311 is configured to allow only light emitted by the red sub-pixel 1211 to pass through, while the green filter section 1312 is configured to allow only light emitted by the green sub-pixel 1212 to pass through. The red sub-pixel 1211 includes a first pixel opening area, and the projection of the red filter portion 1311 on the red sub-pixel 1211 is located in the first pixel opening area. The green sub-pixel 1212 includes a second pixel opening area, and the projection of the green filter portion 1312 on the green sub-pixel 1212 is located in the second pixel opening area.

[0064] like Figure 1 and Figure 3 As shown, the projection of the second filter 132 on the substrate 11 is located in the area of ​​the pixel region P excluding the first sub-pixel region P1. The second filter 132 is configured to transmit only the blue light emitted by the second sub-pixel 122. This can reduce the intensity of light reflected from the cathode 21 by external light, lower the reflectivity of the display panel, and improve the yellowing effect of the display panel, thereby enhancing the display quality.

[0065] Combine Figure 2 and Figure 3 As can be seen, the projection of cathode connection portion 22 on substrate 11 is located within the projection of third filter portion 133 on substrate 11. Third filter portion 133 is configured to transmit only blue light emitted by second sub-pixel 122. This reduces the intensity of light reflected from external light by cathode connection portion 22, lowering the reflectivity of the display panel. It also reduces the yellowing effect of the display panel, improving the display quality.

[0066] Combine Figure 2 and Figure 3 As can be seen, the projection of the conductive line 23 on the substrate 11 lies within the projection of the fourth filter 134 on the substrate 11. The fourth filter 134 is configured to transmit only light emitted by the second sub-pixel 122. This reduces the intensity of light reflected from the conductive line 23 by the external light, lowering the reflectivity of the display panel. It can also alleviate the yellowing effect of the display panel, improving the display quality. It should be noted that the fourth filter 134 may also be provided above the conductive line 23 in the peripheral area NA. "Above" refers to the direction of the distal conductive line 23 from the substrate 11.

[0067] In this embodiment, the filter layer 13 is made of a low-temperature curing material and can be directly formed on the encapsulation layer 15 through a process including coating, exposure, and development.

[0068] Figure 4 4 is a comparison diagram of reflectivity spectra obtained by simulation, wherein curve 41 is the reflectivity spectrum of the display panel where the second filter 132 only covers the second sub-pixel 122, and curve 42 is the reflectivity spectrum of the display panel provided by the embodiment of the present invention. Figure 4 As can be seen from the graph, for curve 42, in addition to a decrease across the entire wavelength range, the decrease is particularly pronounced in the red and green wavelength bands (492nm-577nm, 622nm-770nm). Table 1 shows the L* (brightness), a* (red-green axis), and b* (yellow-blue axis) data calculated using the reflectance spectrum described above. L* represents reflectance, a* indicates the chromaticity along the red-green axis, and b* indicates the chromaticity along the yellow-blue axis. It can be seen that b* has significantly improved from 10.2 (severe yellow hue) to 0.6 (almost no color cast).

[0069] Table 1

[0070] L* a* b* Curve 41 88.7 -1.1 10.2 Curve 42 76.5 3.0 0.6

[0071] In this embodiment, the pixel unit includes a first sub-pixel and a second sub-pixel, the first sub-pixel emits a non-blue color, and the second sub-pixel emits a blue color. The projection of the first sub-pixel on the substrate is located in the first sub-pixel region, and the projection of the second sub-pixel on the substrate is located in the second sub-pixel region. The first sub-pixel and the second sub-pixel in the same pixel unit share the same cathode. Furthermore, the filter layer is located on a side of the pixel unit away from the substrate and includes a first filter portion and a second filter portion. The projection of the first filter portion on the substrate is located in the first sub-pixel region, and the projection of the second filter portion on the substrate is located in a region of the pixel region excluding the first sub-pixel region. The first filter portion is configured to transmit only light emitted by the first sub-pixel, and the second filter portion is configured to transmit only light emitted by the second sub-pixel. That is, the second filter portion covers the region of the cathode of the pixel unit excluding the light emitting region of the first sub-pixel, and the second filter portion only transmits blue light emitted by the second sub-pixel. In this manner, the intensity of light reflected from the cathode by external light can be reduced, thereby reducing the reflectivity of the display panel. This can also improve the yellowing effect of the display panel and enhance the display quality.

[0072] An embodiment of the present invention further provides a display device, comprising a display module and a display panel as described in any one of the above embodiments.

[0073] In one embodiment, the display device may further include a touch sensor, which is located on a side of the filter layer 13 away from the substrate 11 .

[0074] In one embodiment, the display device may further include a glass cover plate or a flexible cover plate, where the glass cover plate or the flexible cover plate is located on a side of the touch sensor away from the substrate 11 .

[0075] In this embodiment, the intensity of the light reflected by the cathode from the external light can be reduced, the reflectivity of the display device can be reduced, and the yellowing phenomenon of the display device can be improved, thereby improving the display effect.

[0076] The embodiment of the present invention further provides a method for manufacturing a display panel, which is used to manufacture the display panel described in any of the above embodiments. Figure 5 As shown, the method for preparing the display panel includes the following steps 501-502:

[0077] In step 501, at least one pixel unit 12 is formed on a substrate 11, the substrate 11 includes a display area AA, the display area AA includes at least one pixel area P and at least one transparent area T; the pixel area P includes a first sub-pixel area P1 and a second sub-pixel area P2; the projection of the pixel unit 12 on the substrate 11 is located in the pixel P area; the pixel unit 12 includes a first sub-pixel 121 and a second sub-pixel 122, the luminous color of the first sub-pixel 121 is non-blue, and the luminous color of the second sub-pixel 122 is blue; the projection of the first sub-pixel 121 on the substrate 11 is located in the first sub-pixel area P1, and the projection of the second sub-pixel 122 on the substrate 11 is located in the second sub-pixel area P2; the first sub-pixel 121 and the second sub-pixel 122 in the same pixel unit 12 share the same cathode 21.

[0078] In step 502, a filter layer 13 is formed. The filter layer 13 is located on the side of the pixel unit 12 away from the substrate 11. The filter layer 13 includes a first filter portion 131 and a second filter portion 132. The projection of the first filter portion 131 on the substrate 11 is located in the first sub-pixel area P1, and the projection of the second filter portion 132 on the substrate 11 is located in the area of ​​the pixel area P excluding the first sub-pixel area P1. The first filter portion 131 is used to allow only light emitted by the first sub-pixel 121 to pass through, and the second filter portion 132 is used to allow only light emitted by the second sub-pixel 122 to pass through.

[0079] In one embodiment, the filter layer 13 further includes a third filter portion 133 and a fourth filter portion 134. In this embodiment, in step 502, the second filter portion 132, the third filter portion 133, and the fourth filter portion 134 can be formed first, followed by the formation of the first filter portion 131. Because the third filter portion 133 can reduce the reflectivity of the cathode connection portion 22, and the fourth filter portion 134 can reduce the reflectivity of the conductive line 23, this eliminates the need to prepare a black matrix above the cathode connection portion 22 and the conductive line 23 to reduce their reflectivity, saving a photolithography process and reducing costs.

[0080] In this embodiment, the intensity of the light reflected by the cathode from the external light can be reduced, the reflectivity of the display panel can be reduced, and the yellowing phenomenon of the display panel can be improved, thereby improving the display effect.

[0081] It should be noted that the display device in this embodiment can be any product or component with a display function, such as electronic paper, a mobile phone, a tablet computer, a television, a laptop computer, a digital photo frame, or a navigator.

[0082] The formation processes used in the above process may include, for example, film forming processes such as deposition and sputtering and patterning processes such as etching.

[0083] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It will also be understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it may be the only layer between the two layers or elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0084] In the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more, unless otherwise clearly defined.

[0085] Other embodiments of the present invention will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the invention being indicated by the following claims.

[0086] It should be understood that the present invention is not limited to the exact construction described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A display panel, characterized in that: include: A substrate comprising a display area, wherein the display area comprises at least one pixel area and at least one transparent area; the pixel area comprises a first sub-pixel area and a second sub-pixel area; at least one pixel unit, wherein the projection of the pixel unit on the substrate is located in the pixel area; the pixel unit includes a first sub-pixel and a second sub-pixel, the first sub-pixel emits a non-blue light color, and the second sub-pixel emits a blue light color; the projection of the first sub-pixel on the substrate is located in the first sub-pixel area, and the projection of the second sub-pixel on the substrate is located in the second sub-pixel area; the first sub-pixel and the second sub-pixel in the same pixel unit share a common cathode; a filter layer located on a side of the pixel unit away from the substrate, the filter layer comprising a first filter portion and a second filter portion, wherein a projection of the first filter portion on the substrate is located in the first sub-pixel region, and a projection of the second filter portion on the substrate is located in a region of the pixel region excluding the first sub-pixel region; the first filter portion is configured to allow only light emitted by the first sub-pixel to pass through, and the second filter portion is configured to allow only light emitted by the second sub-pixel to pass through; The at least one pixel unit is arrayed along a first direction and a second direction; the first direction intersects the second direction; The display panel further includes a cathode connecting portion; the filter layer includes a third filter portion; a projection of the cathode connecting portion on the substrate is located within a projection of the third filter portion on the substrate, and the third filter portion is configured to allow only light emitted by the second sub-pixel to pass through; The cathode connecting portion is located between two cathodes adjacent to each other in the first direction, and is used to connect the two cathodes adjacent to each other in the first direction; and / or, The cathode connecting portion is located between two cathodes adjacent to each other in the second direction, and is used to connect the two cathodes adjacent to each other in the second direction.

2. The display panel according to claim 1, wherein: The first sub-pixel includes a pixel opening area, and a projection of the first filter portion on the first sub-pixel is located in the pixel opening area.

3. The display panel according to claim 1, wherein: The pixel unit includes two first sub-pixels, one of which is a red sub-pixel and emits red light, and the other is a green sub-pixel and emits green light. The pixel area includes two first sub-pixel areas, one of which is a red sub-pixel area, and the other is a green sub-pixel area; the projection of the red sub-pixel on the substrate is located in the red sub-pixel area, and the projection of the green sub-pixel on the substrate is located in the green sub-pixel area; The filter layer includes two first filter parts, one of which is a red filter part, and the other is a green filter part. The red filter part is used to allow only the light emitted by the red sub-pixel to pass through, and the green filter part is used to allow only the light emitted by the green sub-pixel to pass through. The projection of the red filter part on the substrate is located in the red sub-pixel area, and the projection of the green filter part on the substrate is located in the green sub-pixel area.

4. The display panel according to claim 1, wherein: The display panel further includes a driving circuit layer, the driving circuit layer includes a conductive wire, and the conductive wire is located between the substrate and the pixel unit; the conductive wire is made of metal; The filter layer includes a fourth filter portion; a projection of the wire on the substrate is located within a projection of the fourth filter portion on the substrate, and the fourth filter portion is configured to allow only light emitted by the second sub-pixel to pass through.

5. The display panel according to claim 4, wherein: The conductive lines include any one or any combination of gate lines, data lines and power lines.

6. The display panel according to claim 4, wherein: The substrate further includes a peripheral region, the peripheral region at least partially surrounding the display region; The conductive lines are located in the display area and / or the peripheral area.

7. The display panel according to claim 1, wherein: Also includes: The encapsulation layer is located between the pixel unit and the filter layer.

8. The display panel according to claim 1, wherein: Also comprising at least one transparent area; The ratio of the total area of ​​all the pixel areas to the total area of ​​all the transparent areas is 1:1 to 1:5; The area of ​​one of the pixel areas is the same as the area of ​​one of the transparent areas, and at least one of the pixel areas and at least one of the transparent areas are arranged in an array along a first direction and a second direction; the first direction intersects with the second direction; there is at least one of the transparent areas between two adjacent pixel areas in the first direction, and / or there is at least one of the transparent areas between two adjacent pixel areas in the second direction.

9. The display panel according to claim 1, wherein: The material of the filter layer is a low-temperature curing material.

10. A display device, characterized in that: The display panel comprises the display panel according to any one of claims 1 to 9.

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