Display panel and display device

Abstract

The application relates to a display panel and a display device. The display panel comprises a substrate, a reflection layer and a filter layer. The reflection layer is located on the substrate; the filter layer is located on the side of the reflection layer away from the substrate; the filter layer comprises a black matrix, a first black matrix opening and a gray filter layer, the projection of the reflection layer on the substrate is located in the projection of the black matrix on the substrate; the gray filter layer is partially located in the first black matrix opening, the projection of the first black matrix opening on the substrate is located in the projection of the gray filter layer on the substrate; the projection of the first black matrix opening on the substrate is located in a first display area, and the projection of the gray filter layer on the substrate is located in the first display area. According to the embodiment of the application, the light transmission function can be realized, the reflectivity of the first display area can be reduced, the reflected color phase of the first display area can be integrated with black, and the color deviation phenomenon can be avoided.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology

[0002] In related technologies, the screen-to-body ratio requirements for display devices are becoming increasingly stringent. Because irregularly shaped screens such as waterdrop screens and notch screens provide a poor user experience, under-display camera technology has emerged as a solution. In this solution, the display panel includes a first display area that serves both display and light transmission functions, and a second display area that only performs display functions. A camera device can be placed below the first display area to capture images. Summary of the Invention

[0003] The present invention provides a display panel and a display device to address the shortcomings of related technologies.

[0004] According to a first aspect of the present invention, a display panel is provided having a first display area, the display panel comprising:

[0005] Substrate,

[0006] A reflective layer is located on the substrate;

[0007] A filter layer is located on the side of the reflective layer away from the substrate; the filter layer includes a black matrix, a first black matrix opening, and a gray filter layer, wherein the projection of the reflective layer on the substrate lies within the projection of the black matrix on the substrate; the gray filter layer is partially located in the first black matrix opening, and the projection of the first black matrix opening on the substrate lies within the projection of the gray filter layer on the substrate; the projection of the first black matrix opening on the substrate lies in the first display area, and the projection of the gray filter layer on the substrate lies in the first display area.

[0008] In one embodiment, the gray filter layer has approximately the same transmittance for different colors of light.

[0009] In one embodiment, the transmittance ratios of the gray filter layer for light in the 450nm, 550nm, and 650nm wavelength bands are all between 0.8 and 1.2.

[0010] In one embodiment, the transmittance of the gray filter layer for light with wavelengths of 400nm to 700nm is between 45% and 70%.

[0011] In one embodiment, there is a gap between the gray filter layers located in different openings of the first black matrix.

[0012] In one embodiment, the gray filter layers located in two adjacent first black matrix openings are continuous, and the black matrix located between two adjacent first black matrix openings is covered by the gray filter layers;

[0013] The projections of two adjacent first black matrix openings and the black matrix between two adjacent first black matrix openings on the substrate are located within the projection of the gray filter layer on the substrate.

[0014] In one embodiment, the display panel further includes a light-emitting layer and a pixel-defining layer, the pixel-defining layer being located between the substrate and the filter layer, and the pixel-defining layer including a pixel-defining layer opening;

[0015] The light-emitting layer is located between the substrate and the filter layer. The light-emitting layer includes at least one sub-pixel. Each sub-pixel includes a first electrode and an organic light-emitting layer. The organic light-emitting layer is located on the side of the first electrode near the filter layer. The pixel-defining layer is located on the side of the first electrode near the filter layer. The organic light-emitting layer is at least partially located in the opening of the pixel-defining layer.

[0016] The first electrode includes an effective portion and an ineffective portion. The effective portion is in contact with the organic light-emitting layer, and the ineffective portion is in contact with the pixel defining layer. The ineffective portion is part of the reflective layer.

[0017] In one embodiment, the black matrix includes a first light-shielding portion, the projection of the first light-shielding portion onto the substrate covering the projection of the ineffective portion onto the substrate;

[0018] The light-emitting layer includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel; the area of ​​the invalid part in the first green sub-pixel is larger than the area of ​​the invalid part in the first red sub-pixel, and also larger than the area of ​​the invalid part in the first blue sub-pixel; the area of ​​the first light-blocking part that projects onto and covers the invalid part in the first green sub-pixel is larger than the area of ​​the first light-blocking part that projects onto and covers the invalid part in the first red sub-pixel, and also larger than the area of ​​the first light-blocking part that projects onto and covers the invalid part in the first blue sub-pixel.

[0019] In one embodiment, the filter layer further includes a second black matrix opening and a color filter layer;

[0020] The projection of the effective portion onto the substrate is located within the projection of the color filter layer onto the substrate; the color filter layer is partially located in the opening of the second black matrix, and the projection of the second black matrix opening onto the substrate is located within the projection of the color filter layer onto the substrate.

[0021] In one embodiment, the reflective layer further includes a first signal line located between the substrate and the light-emitting layer.

[0022] In one embodiment, the display panel further includes a driving circuit layer, the first signal line is located in the driving circuit layer, the driving circuit layer further includes a pixel circuit, the pixel circuit is electrically connected to the sub-pixel, and the first signal line is electrically connected to the pixel circuit.

[0023] In one embodiment, the reflective layer further includes a second signal line and a touch electrode, the second signal line and the touch electrode being located between the light-emitting layer and the filter layer; the display panel further includes a touch layer, the touch layer being located between the light-emitting layer and the filter layer, the second signal line and the touch electrode being located in the touch layer, and the second signal line being electrically connected to the touch electrode.

[0024] In one embodiment, the display panel further includes a second display area, the first display area being adjacent to the second display area, and the light transmittance of the first display area being greater than that of the second display area.

[0025] According to a second aspect of the present invention, a display device is provided, including the display panel and the photosensitive element described above;

[0026] The photosensitive element is located on the side of the substrate opposite to the reflective layer, or the photosensitive element is located in the display panel;

[0027] The projection of the photosensitive element onto the substrate is located in the first display area.

[0028] As described in the above embodiments, since the filter layer is located on the side of the reflective layer away from the substrate, and includes a black matrix, a first black matrix opening, and a gray filter layer, the projection of the reflective layer on the substrate lies within the projection of the black matrix on the substrate. Therefore, the black matrix can absorb the light reflected by the reflective layer, preventing the light reflected by the reflective layer from exiting perpendicularly and affecting the display effect. Furthermore, since the gray filter layer is partially located within the first black matrix opening, and the projection of the first black matrix opening on the substrate lies within the projection of the gray filter layer on the substrate, and the projection of the first black matrix opening on the substrate lies within the first display area, and the projection of the gray filter layer on the substrate lies within the first display area, and since the transmittance of the gray filter layer is between that of the black matrix and the transparent layer, it can achieve light transmission while avoiding excessively high transmittance that would cause a large intensity of light reflected by the reflective layer. This reduces the reflectivity of the first display area, preventing any impact on the display effect of the first display area. Moreover, since the gray filter layer has the same transmittance for different colors of light, the transmitted hue can achieve a uniform black. After the light transmitted through the gray filter layer is reflected by the reflective part, the reflected hue can also achieve a uniform black (true black). This means that the reflected hue of the first display area can achieve a uniform black, avoiding color shift.

[0029] When the display device includes the aforementioned display panel and photosensitive element, and the projection of the photosensitive element onto the substrate is located in the first display area, the transmittance of the gray filter layer is between that of the black matrix and the transparent layer, enabling light transmission. This allows the photosensitive element to collect the light transmitted through the gray filter layer and thus achieve its photosensitive function. Since the gray filter layer has the same transmittance for different colors of light, the transmitted hue can achieve a uniform black, thereby avoiding color shift when the photosensitive element performs its photosensitive function.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0032] Figure 1 This is a schematic diagram of the structure of a display panel according to an embodiment of the present invention;

[0033] Figure 2A This is a schematic diagram of another display panel structure according to an embodiment of the present invention;

[0034] Figure 2B This is a schematic diagram of another display panel structure according to an embodiment of the present invention;

[0035] Figure 3This is a top view of a display panel according to an embodiment of the present invention;

[0036] Figure 4 This is a top view of another display panel according to an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of another display panel structure according to an embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of another display panel structure according to an embodiment of the present invention;

[0039] Figure 7 This is a top view of another display panel according to an embodiment of the present invention;

[0040] Figure 8 This is a top view of another display panel according to an embodiment of the present invention. Detailed Implementation

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0042] This invention provides a display panel. The display panel 1, as shown... Figure 1 As shown, a first display area 11 is formed. Figure 2A As shown, the display panel 1 includes: a substrate 21, a reflective layer and a filter layer 22.

[0043] like Figure 2A As shown, the reflective layer is located on the substrate 21. The filter layer 22 is located on the side of the reflective layer away from the substrate 21. The filter layer 22 includes a black matrix 221, a first black matrix opening 224, and a gray filter layer 222. The projection of the reflective layer onto the substrate 21 lies within the projection of the black matrix 221 onto the substrate 21. The gray filter layer 222 is partially located within the first black matrix opening 224. The projection of the first black matrix opening 224 onto the substrate 21 lies within the projection of the gray filter layer 222 onto the substrate 21. The projection of the first black matrix opening 224 onto the substrate 21 lies within the first display area 11, and the projection of the gray filter layer 222 onto the substrate 21 lies within the first display area 11.

[0044] In this embodiment, since the filter layer is located on the side of the reflective layer away from the substrate, the filter layer includes a black matrix, a first black matrix opening, and a gray filter layer. The projection of the reflective layer on the substrate lies within the projection of the black matrix on the substrate. Therefore, the black matrix can absorb the light reflected by the reflective layer, preventing the light reflected by the reflective layer from being emitted perpendicularly and affecting the display effect. Furthermore, since the gray filter layer is partially located within the first black matrix opening, and the projection of the first black matrix opening on the substrate lies within the projection of the gray filter layer on the substrate, and the projection of the first black matrix opening on the substrate lies within the first display area, and the projection of the gray filter layer on the substrate lies within the first display area, and since the transmittance of the gray filter layer is between that of the black matrix and the transparent layer, it can achieve light transmission while avoiding excessively high transmittance that would cause a large intensity of light reflected by the reflective layer. This reduces the reflectivity of the first display area, preventing any impact on the display effect of the first display area. Moreover, since the gray filter layer has the same transmittance for different colors of light, the transmitted hue can achieve a uniform black. After the light transmitted through the gray filter layer is reflected by the reflective part, the reflected hue can also achieve a uniform black (true black). This means that the reflected hue of the first display area can achieve a uniform black, avoiding color shift.

[0045] The above provides a brief description of the display panel provided in the embodiments of the present invention. The following provides a detailed description of the display panel provided in the embodiments of the present invention.

[0046] This invention also provides a display panel. The display panel 1, as shown... Figure 1 As shown, it includes: a first display area 11 and a second display area 12.

[0047] In this embodiment, the second display area 12 is adjacent to the first display area 11. The second display area 12 surrounds the first display area 11 from three sides, but is not limited thereto. The light transmittance of the first display area 11 is greater than that of the second display area 12. The first display area 11 can perform both light transmission and display functions. The second display area 12 is only used for display functions. The shape of the first display area 11 can be circular or other shapes, such as rectangular, hexagonal, etc. When the shape of the first display area 11 is circular, the diameter of the first display area 11 is less than or equal to 5 mm. When the shape of the first display area 11 is rectangular, the length of the first display area 11 is less than or equal to 5 mm.

[0048] In some embodiments, the structure of the display panel 1 in the first display area 11 is as follows: Figure 2A As shown, the structure of the display panel 1 in the second display area 12 is as follows: Figure 5 As shown.

[0049] In some embodiments, such as Figure 2AAs shown, the display panel 1 includes a substrate 21, a reflective layer, a driving circuit layer 23, a pixel defining layer 24, a light-emitting layer, an encapsulation layer 26, a filter layer 22, and a planarization layer 27.

[0050] In some embodiments, such as Figure 2A As shown, the driving circuit layer 23 is located on the substrate 21. The driving circuit layer 23 may include pixel circuitry and a first signal line 231. The first signal line 231 is electrically connected to the pixel circuitry. The first signal line 231 may include at least one of data signal lines, gate drive signal lines, reset signal lines, etc., but is not limited thereto. The material of the first signal line 231 may be a metallic material. The first signal line 231 can reflect incident light. The first signal line 231 is part of the reflective layer. The reflected light from the first signal line 231 will affect the display effect of the first display area 11 and needs to be reduced or eliminated.

[0051] In some embodiments, such as Figure 2A As shown, the pixel defining layer 24 is located on the side of the driving circuit layer 23 away from the substrate 21. The pixel defining layer 24 includes a pixel defining layer opening.

[0052] In some embodiments, such as Figure 2A As shown, in the first display area 11, the light-emitting layer includes first pixel units 25 arranged in an array, each first pixel unit 25 including at least one first sub-pixel 251. In this embodiment, each first pixel unit 25 may include three first sub-pixels 251. In this embodiment, each first pixel unit 25 may include a first red sub-pixel 251r, a first green sub-pixel 251g, and a first blue sub-pixel 251b arranged sequentially. The first red sub-pixel 251r is used to emit red light, the first green sub-pixel 251g is used to emit green light, and the first blue sub-pixel 251b is used to emit blue light.

[0053] like Figure 2A As shown, each first sub-pixel 251 can be an OLED (Organic Light-Emitting Diode) sub-pixel. Each first sub-pixel 251 may include a first electrode 2511, a first organic light-emitting layer 2512, and a second electrode 2513. The first electrode 2511 can be an anode, electrically connected to the corresponding pixel circuit, and the second electrode 2513 can be a cathode. The first electrode 2511 is located on the side of the driving circuit layer 23 away from the substrate 21, the first organic light-emitting layer 2512 is located on the side of the first electrode 2511 close to the encapsulation layer 26, and the second electrode 2513 is located on the side of the first organic light-emitting layer 2512 close to the encapsulation layer 26.

[0054] like Figure 2AAs shown, in some embodiments, the first electrode 2511 is made of a metallic material and can reflect incident light. The first electrode 2511 includes an effective portion a1 and an ineffective portion a2. The effective portion a1 is in contact with the first organic light-emitting layer 2512, and the ineffective portion a2 is in contact with the pixel defining layer 24. The ineffective portion a2 is also part of the aforementioned reflective layer. The ineffective portion a2 can reflect incident light. The reflected light from the ineffective portion a2 can affect the display effect of the first display area 11 and needs to be reduced or eliminated.

[0055] like Figure 2A As shown, in some embodiments, the pixel defining layer 24 is located on the side of the first electrode 2511 near the encapsulation layer 26, and the entire first organic light-emitting layer 2512 is located within the opening of the pixel defining layer. The projection of the effective portion a1 onto the substrate 21 is located within the projection of the color filter layer 223 onto the substrate 21. In other words, the projection of the bottom surface of the pixel defining layer opening near the first electrode 2511 onto the substrate 21 is located within the projection of the color filter layer 223 onto the substrate 21. The second electrode 2513 may be a surface electrode, and all first sub-pixels 251 may share a surface electrode, but this is not limited to this. The second electrode 2513 may be a transparent conductive material; for example, the second electrode may include at least one of metal or ITO (indium tin oxide). In other embodiments, the first organic light-emitting layer 2512 is partially located within the opening of the pixel defining layer.

[0056] like Figure 2A As shown, the first red sub-pixel 251r includes a first organic light-emitting layer R for emitting red light, the first green sub-pixel 251g includes a second organic light-emitting layer G for emitting green light, and the first blue sub-pixel 251b includes a third organic light-emitting layer B for emitting blue light.

[0057] like Figure 2A As shown, in some embodiments, the encapsulation layer 26 is located on the side of the light-emitting layer away from the substrate 21, and is used to prevent water and oxygen from eroding the first sub-pixel 251, thereby protecting the first sub-pixel 251 and extending its lifespan. Of course, the encapsulation layer 26 can also protect the second sub-pixel 511 in the second display area 12.

[0058] In some embodiments, such as Figure 2AAs shown, the display panel 1 may further include a touch layer 28, which is located between the encapsulation layer 26 and the filter layer 22. The touch layer 28 includes touch electrodes and second signal lines 281. The second signal lines 281 are electrically connected to the touch electrodes. The touch electrodes are used to locate the touch point, and the second signal lines 281 are used to transmit touch signals. The touch electrodes are made of metallic materials, and the second signal lines 281 are also made of metallic materials. For example, the touch electrodes may be a Ti / Al / Ti stacked structure. The touch electrodes and the second signal lines 281 can reflect incident light. The touch electrodes and the second signal lines 281 are part of a reflective layer. The reflected light from the touch electrodes and the second signal lines 281 can affect the display effect of the first display area 11, and needs to be reduced or eliminated.

[0059] In other embodiments, the material of the touch electrode may include a metal material and indium tin oxide (ITO), for example, the touch electrode may be an ITO / Ag / ITO stacked structure.

[0060] like Figure 2B As shown, in some embodiments, the filter layer 22 includes a black matrix 221, a first black matrix opening 224, a second black matrix opening 225, a gray filter layer 222, and a color filter layer 223. The first black matrix opening 224 and the second black matrix opening 225 can be obtained by opening the black matrix 221.

[0061] In some embodiments, the color filter layer 223 includes a red filter layer 223r, a green filter layer 223g, and a blue filter layer 223b. A black matrix 221 exists between the red filter layer 223r and the green filter layer 223g, and between the green filter layer 223g and the blue filter layer 223b. The black matrix 221 is used to prevent color crosstalk in light emitted from two adjacent color filter layers 223.

[0062] In some embodiments, the color filter layer 223 is partially located within the second black matrix opening 225, and the projection of the second black matrix opening 225 onto the substrate 21 lies within the projection of the color filter layer 223 onto the substrate. The projection of the first organic light-emitting layer 2512 (or effective portion a1) onto the substrate 21 lies within the projection of the color filter layer 223 onto the substrate 21. For example, the projection of the first organic light-emitting layer R (effective portion a1) in the first red sub-pixel 251r onto the substrate 21 lies within the projection of the red filter layer 223r onto the substrate 21, allowing red light in natural light to pass through the red filter layer 223r while blocking light of other colors from passing through, thus preventing other colors of light in natural light from affecting the emission color of the first red sub-pixel 251r. The projection of the second organic light-emitting layer G (or effective part a1) in the first green sub-pixel 251g onto the substrate 21 lies within the projection of the green filter layer 223g onto the substrate 21. This allows green light from natural light to pass through the first green sub-pixel 251g while blocking the transmission of other colors of light, thus preventing other colors of light from affecting the emission color of the first green sub-pixel 251g. Similarly, the projection of the third organic light-emitting layer B (or effective part a1) in the first blue sub-pixel 251b onto the substrate 21 lies within the projection of the blue filter layer 223b onto the substrate 21. This allows blue light from natural light to pass through the first blue sub-pixel 251b while blocking the transmission of other colors of light, thus preventing other colors of light from affecting the emission color of the first blue sub-pixel 251b. The transmittance of the color filter layer 223 is higher than that of the polarizer, and it can replace the polarizer to eliminate the influence of natural light on the display effect.

[0063] In some embodiments, in the first display area 11, the color filter layer 223 and the black matrix 221 have an overlapping portion, the width of which is 1 to 4 micrometers. For example, the width of the overlapping portion is 1 micrometer, 2 micrometers, 3 micrometers or 4 micrometers.

[0064] In some embodiments, such as Figure 2A and Figure 2A As shown, the projection of the reflective layer onto the substrate 21 lies within the projection of the black matrix 221 onto the substrate 21. For example, the projection of the first signal line 231 onto the substrate 21 lies within the projection of the black matrix 221 onto the substrate 21, the projection of the invalid part a2 onto the substrate 21 lies within the projection of the black matrix 221 onto the substrate 21, the projection of the touch electrode onto the substrate 21 lies within the projection of the black matrix 221 onto the substrate 21, and the projection of the second signal line onto the substrate 21 lies within the projection of the black matrix 221 onto the substrate 21. The black matrix can absorb the light reflected by the reflective layer, preventing the light reflected by the reflective layer from being emitted perpendicularly and affecting the display effect.

[0065] In some embodiments, such as Figure 2BAs shown, the gray filter layer 222 is partially located within the first black matrix opening 224, and the projection of the first black matrix opening 224 onto the substrate 21 lies within the projection of the gray filter layer 222 onto the substrate 21. The projection of the first black matrix opening 224 onto the substrate 21 lies within the first display area 11, and the projection of the gray filter layer 222 onto the substrate 21 also lies within the first display area 11.

[0066] In some embodiments, the transmittance of the gray filter layer 222 for light with wavelengths from 400 nm to 700 nm is between 45% and 70%. For example, the transmittance of the gray filter layer 222 for light with wavelengths from 400 nm to 700 nm is 45%, 55%, 60%, 65%, or 70%. Furthermore, the transmittance of the gray filter layer 222 for light with a wavelength of 450 nm is 45%, 55%, 60%, 65%, or 70%, the transmittance for light with a wavelength of 550 nm is 45%, 55%, 60%, 65%, or 70%, and the transmittance for light with a wavelength of 650 nm is 45%, 55%, 60%, 65%, or 70%.

[0067] In this embodiment of the invention, since the transmittance of the gray filter layer 222 is between that of the black matrix 221 and the transmittance of the transparent layer, it can achieve the function of light transmission while avoiding excessive light intensity reflected by the reflective layer due to excessively high transmittance. This reduces the reflectivity of the first display area and avoids affecting the display effect of the first display area. The transmittance of the transparent layer can be above 98%.

[0068] In some embodiments, such as Figure 2A As shown, there are gaps between the gray filter layers 222 located in different first black matrix openings 224. In other words, the gray filter layers 222 located in different first black matrix openings 224 are discontinuous.

[0069] In some embodiments, the first sub-pixel 251 is arranged in an sRGB pixel arrangement. In this embodiment, the aperture ratio of the first sub-pixel 251 is relatively large, and the area it can cover for the first signal line 231 is relatively large. The first signal line 231 may be blocked, and incident light cannot reach the first signal line 231. Therefore, the black matrix 221 only needs to block the inactive part a2 of the first electrode 2511, the second signal line 281, and the touch electrode.

[0070] In some embodiments, when the display panel includes a touch layer, such as Figure 2AAs shown, the black matrix 221 includes a first light-shielding part 2211, a second light-shielding part 2212, and a third light-shielding part 2213. The projection of the first light-shielding part 2211 onto the substrate 21 covers the projection of the invalid part a2 onto the substrate 21. In other words, the projection of the invalid part a2 onto the substrate 21 is located within the projection of the first light-shielding part 2211 onto the substrate 21. The projection of the touch electrode onto the substrate 21 is located within the projection of the second light-shielding part 2212 onto the substrate 21. The projection of the second signal line 281 onto the substrate 21 is located within the projection of the third light-shielding part 2213 onto the substrate 21. The gray filter layer 222 is located in the area of ​​the filter layer 22 where there is no black matrix 221 or color filter layer 223.

[0071] In other embodiments, the first sub-pixel 251 is arranged in a pentile pixel arrangement. A pentile pixel arrangement refers to an arrangement where adjacent first pixel units 25 share sub-pixels. Pentile pixel arrangements include various pixel arrangement methods, such as GGRB pixel arrangement and diamond pixel arrangement. In this embodiment, as... Figure 3 As shown, the black matrix 221 includes a first light-shielding portion 2211 and a fourth light-shielding portion 2214. The projection of the invalid portion a2 on the substrate 21 is located within the projection of the first light-shielding portion 2211 on the substrate 21, and the projection of the first signal line 231 on the substrate 21 is located within the projection of the fourth light-shielding portion 2214 on the substrate 21. The first light-shielding portion 2211 includes a first sub-light-shielding portion 221r, a second sub-light-shielding portion 221g, and a third sub-light-shielding portion 221b. The projection of the invalid portion a2 in the first red sub-pixel 251r on the substrate 21 is located within the projection of the first sub-light-shielding portion 221r ​​on the substrate 21, the projection of the invalid portion a2 in the first green sub-pixel 251g on the substrate 21 is located within the projection of the second sub-light-shielding portion 221g on the substrate 21, and the projection of the invalid portion a2 in the first blue sub-pixel 251b on the substrate 21 is located within the projection of the third sub-light-shielding portion 221b on the substrate 21. Since the area of ​​the first green sub-pixel 251g is smaller than the area of ​​the first red sub-pixel 251r and the area of ​​the first blue sub-pixel 251b, the exposed area of ​​the invalid portion a2 in the first green sub-pixel 251g is larger than the exposed area of ​​the invalid portion a2 in the first red sub-pixel 251r and also larger than the exposed area of ​​the invalid portion a2 in the first blue sub-pixel 251b. Furthermore, the area of ​​the second sub-shading portion 221g is larger than the area of ​​the first sub-shading portion 221r ​​and the area of ​​the third sub-shading portion 221b. The gray filter layer 222 is located in the region of the filter layer 22 where there is no black matrix 221 and color filter layer 223.

[0072] In some embodiments, the gray filter layer 222 has approximately the same transmittance for different colors of light. For example, the gray filter layer 222 has the same transmittance for different colors of light, or the ratio of the transmittance of the gray filter layer 222 for different colors of light fluctuates within a small range around 1. Since the gray filter layer has approximately the same transmittance for different colors of light, the transmitted hue can be essentially achieved as a solid black. After the light transmitted through the gray filter layer is reflected by the reflective part, the reflected hue can also be essentially achieved as a solid black (true black). That is, the reflected hue of the first display area can be essentially achieved as a solid black, avoiding color shift.

[0073] In some embodiments, the pairwise ratios of the transmittance of the gray filter layer 222 for light in the 450nm, 550nm, and 650nm wavelength bands are all between 0.8 and 1.2. For example, the ratio of the transmittance of the gray filter layer 222 for 450nm light to the transmittance of the gray filter layer 222 for 550nm light is between 0.8 and 1.2, and the ratio of the transmittance of the gray filter layer 222 for 450nm light to the transmittance of the gray filter layer 222 for 550nm light is 0.8, 1.0, or 1.2. The ratio of the transmittance of the gray filter layer 222 for 450nm light to the transmittance of the gray filter layer 222 for 650nm light is between 0.8 and 1.2, and the ratio of the transmittance of the gray filter layer 222 for 450nm light to the transmittance of the gray filter layer 222 for 650nm light is 0.8, 1.0, or 1.2. The ratio of the transmittance of gray filter layer 222 for 550nm light to the transmittance of gray filter layer 222 for 650nm light is between 0.8 and 1.2. The ratio of the transmittance of gray filter layer 222 for 550nm light to the transmittance of gray filter layer 222 for 650nm light is 0.8, 1.0, or 1.2.

[0074] In some embodiments, the gray filter layer 222 can be made of an organic material, which simplifies the fabrication process. The transmittance of the gray filter layer 222 can be modulated according to actual needs. Of course, the gray filter layer 222 can also be made of an inorganic material.

[0075] Table 1 lists the optical parameters of the first display area 11 when the transmittance of the gray filter layer 222 changes. Wherein, Tr is the transmittance of the gray filter layer 222 across the entire wavelength range (400nm–700nm), Rgain is the relative increase in red light transmittance compared to a display panel using a polarizer, Ggain is the relative increase in green light transmittance compared to a display panel using a polarizer, and Bgain is the relative increase in blue light transmittance compared to a display panel using a polarizer. a* represents red-green, a positive a* indicates a reddish tint, and a negative a* indicates a greenish tint; b* represents yellow-blue, a positive b* indicates a yellowish tint, and a negative b* indicates a bluish tint. Rtotal is the reflectance of the first display area 11 across the entire wavelength range, and R550 is the reflectance of the first display area 11 for 550nm light (green light). The reference values ​​are the optical parameters of the second display area 12.

[0076] Table 1

[0077] Tr Figure 4 R yield G yield a* b* B yield R550 45％ 4.7％ 4.7％ 4.7％ 0.0 -.04 10.3％ 10.3％ 50％ 16.3％ 16.3％ 16.3％ 0.0 -0.4 11.7％ 11.7％ 55％ 27.9％ 27.9％ 27.9％ 0.0 -0.3 13.2％ 13.2％ 60％ 39.5％ 39.5％ 39.5％ 0.0 -0.2 20.6％ 20.6％ R total - - - -0.4 -1.8 5.5％ 5.6％

[0078] As shown in Table 1, because the transmittance of the gray filter layer 222 is relatively consistent across the entire wavelength range (400nm~700nm), the reflected hue of the first display area 11 can achieve true black regardless of how the transmittance of the gray filter layer 222 changes. Although there is still a certain difference between the reflectance of the first display area 11 and the second display area 12, the reflectance of the first display area 11 has been reduced from more than 30% in related technologies to about 10%, which is a significant improvement.

[0079] In some embodiments, such as Reference value As shown, in the second display area 12, the light-emitting layer includes second pixel units 51 arranged in an array, each second pixel unit 51 including at least one second sub-pixel 511. The aperture ratio of the first sub-pixel 251 is less than or equal to the aperture ratio of the second sub-pixel 511. In this embodiment, each second pixel unit 51 may include three second sub-pixels 511. In this embodiment, each second pixel unit 51 may include a second red sub-pixel 511r, a second green sub-pixel 511g, and a second blue sub-pixel 511b arranged sequentially. The second red sub-pixel 511r emits red light, the second green sub-pixel 511g emits green light, and the second blue sub-pixel 511b emits blue light.

[0080] like Figure 5As shown, each second sub-pixel 511 can be an OLED sub-pixel. Each second sub-pixel 511 may include a third electrode 5111, a second organic light-emitting layer 5112, and a fourth electrode 5113. The third electrode 5111 can be an anode, and the fourth electrode 5113 can be a cathode. The third electrode 5111 is located on the side of the driving circuit layer 23 away from the substrate 21, the second organic light-emitting layer 5112 is located on the side of the third electrode 5111 close to the encapsulation layer 26, and the fourth electrode 5113 is located on the side of the second organic light-emitting layer 5112 close to the encapsulation layer 26. The pixel defining layer 24 is located on the side of the third electrode 5111 close to the encapsulation layer 26. The second organic light-emitting layer 5112 is entirely located in the opening of the pixel defining layer. The projection of the bottom surface of the pixel defining layer opening near the third electrode 5111 onto the substrate 21 is located within the projection of the third electrode 5111 onto the substrate 21. In other words, the contact area between the second organic light-emitting layer 5112 and the third electrode 5111 is smaller than that of the third electrode 5111. The fourth electrode 5113 may be a surface electrode, shared by all second sub-pixels 511, but is not limited thereto. The fourth electrode 5113 may be a transparent conductive material; for example, the fourth electrode 5113 may include at least one of metal or ITO (indium tin oxide). In some other embodiments, a portion of the second organic light-emitting layer 5112 is located in the pixel defining layer opening.

[0081] like Figure 5 As shown, the second red sub-pixel 511r includes a first organic light-emitting layer R for emitting red light, the second green sub-pixel 511g includes a second organic light-emitting layer G for emitting green light, and the second blue sub-pixel 511b includes a third organic light-emitting layer B for emitting blue light.

[0082] In some embodiments, the projection of the first organic light-emitting layer R in the second red sub-pixel 511r onto the substrate 21 lies within the projection of the red filter layer 223r onto the substrate 21, allowing red light from natural light to pass through the red filter layer 223r while blocking light of other colors from passing through, thus preventing other colors of light from affecting the emission color of the second red sub-pixel 511r. Similarly, the projection of the second organic light-emitting layer G in the second green sub-pixel 511g onto the substrate 21 lies within the projection of the green filter layer 223g onto the substrate 21, allowing green light from natural light to pass through the second green sub-pixel 511g while blocking light of other colors from passing through, thus preventing other colors of light from affecting the emission color of the second green sub-pixel 511g. Likewise, the projection of the third organic light-emitting layer B in the second blue sub-pixel 511b onto the substrate 21 lies within the projection of the blue filter layer 223b onto the substrate 21, allowing blue light from natural light to pass through the second blue sub-pixel 511b while blocking light of other colors from passing through, thus preventing other colors of light from affecting the emission color of the second blue sub-pixel 511b. The color filter layer 223 has a higher transmittance than the polarizer, and can replace the polarizer to eliminate the influence of natural light on the display effect.

[0083] In some embodiments, such as Figure 5 As shown, the projection of the black matrix 221 onto the substrate 21 lies within the projection of the pixel defining layer 24 onto the substrate 21. In the second display area 12, the color filter layer 223 and the black matrix 221 have an overlapping portion, the width of which is 1 to 8 micrometers. For example, the width of the overlapping portion can be 1 micrometer, 4 micrometers, 5 micrometers, or 8 micrometers.

[0084] In some embodiments, such as Figure 5 As shown, in the second display area 12, the filter layer 22 may not include the gray filter layer 222.

[0085] In some embodiments, such as Figure 5 and 5 As shown, the planarization layer 27 is located on the side of the filter layer 22 away from the substrate 21. The planarization layer 27 is a transparent layer with a transmittance greater than or equal to 98%. The material of the planarization layer 27 can be an organic material. In other embodiments, the display panel may not have a planarization layer 27. In this case, neither the first display area 11 nor the second display area 12 has a planarization layer 27.

[0086] In some embodiments, the materials of the black matrix 221, the color filter layer 223, and the planarization layer 27 can all be low-temperature curing materials, which can be directly fabricated on the encapsulation layer 26, the touch layer, or the filter layer 22 through processes such as coating, exposure, and development.

[0087] In this embodiment of the invention, since the filter layer is located on the side of the reflective layer away from the substrate, the filter layer includes a black matrix, a first black matrix opening, and a gray filter layer. The projection of the reflective layer on the substrate lies within the projection of the black matrix on the substrate. Therefore, the black matrix can absorb the light reflected by the reflective layer, preventing the light reflected by the reflective layer from exiting perpendicularly and affecting the display effect. Furthermore, since the gray filter layer is partially located within the first black matrix opening, and the projection of the first black matrix opening on the substrate lies within the projection of the gray filter layer on the substrate, and the projection of the first black matrix opening on the substrate lies within the first display area, and the projection of the gray filter layer on the substrate lies within the first display area, and since the transmittance of the gray filter layer is between that of the black matrix and the transparent layer, it can achieve light transmission while avoiding excessively high transmittance that would cause a large intensity of light reflected by the reflective layer. This reduces the reflectivity of the first display area, preventing any impact on the display effect of the first display area. Moreover, since the gray filter layer has the same transmittance for different colors of light, the transmitted hue can achieve a uniform black. After the light transmitted through the gray filter layer is reflected by the reflective part, the reflected hue can also achieve a uniform black (true black). This means that the reflected hue of the first display area can achieve a uniform black, avoiding color shift.

[0088] Embodiments of the present invention also propose a display panel. For example...Figure 2A Figure 6 to Figure 8 As shown, in this embodiment, the gray filter layers 222 located in two adjacent first black matrix openings 224 are continuous, and the black matrix 221 located between two adjacent first black matrix openings 224 is covered by the gray filter layer 222. The projections of the two adjacent first black matrix openings 224 and the black matrix 221 between two adjacent first black matrix openings 224 on the substrate 21 are located within the projection of the gray filter layer 222 on the substrate 21.

[0089] In this embodiment, the gray filter layer 222, whose projection on the substrate 21 is located within the projection of the pixel defining layer 24 on the substrate 21, does not need to be patterned, which simplifies the fabrication process and saves costs.

[0090] Embodiments of the present invention also provide a display device, including a photosensitive element and a display panel as described in any of the above embodiments.

[0091] In this embodiment, the photosensitive element is located on the side of the substrate 21 facing away from the reflective layer, or the photosensitive element is located in the display panel.

[0092] The projection of the photosensitive element onto the substrate 21 is located in the first display area 11.

[0093] In some embodiments, the photosensitive element may be an image acquisition device, but is not limited thereto.

[0094] In this embodiment of the invention, since the filter layer is located on the side of the reflective layer away from the substrate, the filter layer includes a black matrix, a first black matrix opening, and a gray filter layer. The projection of the reflective layer on the substrate lies within the projection of the black matrix on the substrate. Therefore, the black matrix can absorb the light reflected by the reflective layer, preventing the light reflected by the reflective layer from being emitted perpendicularly and affecting the display effect. Furthermore, since the gray filter layer is partially located within the first black matrix opening, and the projection of the first black matrix opening on the substrate lies within the projection of the gray filter layer on the substrate, and the projection of the first black matrix opening on the substrate lies within the first display area, and the projection of the gray filter layer on the substrate lies within the first display area, and since the transmittance of the gray filter layer is between that of the black matrix and the transparent layer, it can achieve light transmission while avoiding excessively high transmittance that would cause a large intensity of light reflected by the reflective layer. This reduces the reflectivity of the first display area, preventing any impact on the display effect of the first display area. Moreover, since the gray filter layer has the same transmittance for different colors of light, the transmitted hue can achieve a uniform black. After the light transmitted through the gray filter layer is reflected by the reflective part, the reflected hue can also achieve a uniform black (true black). This means that the reflected hue of the first display area can achieve a uniform black, avoiding color shift.

[0095] In some embodiments, when the projection of the photosensitive element onto the substrate is located in the first display area, the transmittance of the gray filter layer is between that of the black matrix and the transparent layer, enabling light transmission. This allows the photosensitive element to collect the light transmitted through the gray filter layer and thus achieve the photosensitive function. Since the gray filter layer has the same transmittance for different colors of light, the transmitted hue can achieve a uniform black, thereby avoiding color shift when the photosensitive element performs its photosensitive function.

[0096] It should be noted that the display device in this embodiment can be any product or component with display function, such as electronic paper, mobile phone, tablet computer, television, laptop computer, digital photo frame, or navigator.

[0097] The formation processes used in the above process may include, for example, film formation processes such as deposition and sputtering, and patterning processes such as etching.

[0098] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0099] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0100] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. The invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0101] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A display panel, characterized in that, A first display area is formed, which is used to realize display function and light transmission function; the display panel includes: Substrate, A reflective layer is located on the substrate; A filter layer is located on the side of the reflective layer away from the substrate; the filter layer includes a black matrix, a first black matrix opening, and a gray filter layer, wherein the projection of the reflective layer on the substrate lies within the projection of the black matrix on the substrate; the gray filter layer is partially located in the first black matrix opening, and the projection of the first black matrix opening on the substrate lies within the projection of the gray filter layer on the substrate; the projection of the first black matrix opening on the substrate lies in the first display area, and the projection of the gray filter layer on the substrate lies in the first display area; The gray filter layer has approximately the same transmittance for different colors of light; the ratio of each pair of transmittances of the gray filter layer for light in the three wavelength bands of 450nm, 550nm, and 650nm is between 0.8 and 1.2; and the transmittance of the gray filter layer for light with wavelengths of 400nm to 700nm is between 45% and 70%.

2. The display panel according to claim 1, characterized in that, There are gaps between the gray filter layers located in different openings of the first black matrix.

3. The display panel according to claim 1, characterized in that, The gray filter layers located in the two adjacent openings of the first black matrix are continuous, and the black matrix located between the two adjacent openings of the first black matrix is ​​covered by the gray filter layers; The projections of two adjacent first black matrix openings and the black matrix between two adjacent first black matrix openings on the substrate are located within the projection of the gray filter layer on the substrate.

4. The display panel according to claim 1, characterized in that, It also includes a light-emitting layer and a pixel-defining layer, wherein the pixel-defining layer is located between the substrate and the filter layer, and the pixel-defining layer includes a pixel-defining layer opening; The light-emitting layer is located between the substrate and the filter layer. The light-emitting layer includes at least one sub-pixel. Each sub-pixel includes a first electrode and an organic light-emitting layer. The organic light-emitting layer is located on the side of the first electrode near the filter layer. The pixel-defining layer is located on the side of the first electrode near the filter layer. The organic light-emitting layer is at least partially located in the opening of the pixel-defining layer. The first electrode includes an effective portion and an ineffective portion. The effective portion is in contact with the organic light-emitting layer, and the ineffective portion is in contact with the pixel defining layer. The ineffective portion is part of the reflective layer.

5. The display panel according to claim 4, characterized in that, The black matrix includes a first light-shielding part, the projection of the first light-shielding part on the substrate covering the projection of the ineffective part on the substrate; The light-emitting layer includes a first red sub-pixel, a first green sub-pixel, and a first blue sub-pixel; The area of ​​the invalid part in the first green sub-pixel is larger than the area of ​​the invalid part in the first red sub-pixel, and also larger than the area of ​​the invalid part in the first blue sub-pixel; the area of ​​the first light-blocking part that projects onto the invalid part in the first green sub-pixel is larger than the area of ​​the first light-blocking part that projects onto the invalid part in the first red sub-pixel, and also larger than the area of ​​the first light-blocking part that projects onto the invalid part in the first blue sub-pixel.

6. The display panel according to claim 4, characterized in that, The filter layer also includes a second black matrix opening and a color filter layer; The projection of the effective portion onto the substrate is located within the projection of the color filter layer onto the substrate; the color filter layer is partially located in the opening of the second black matrix, and the projection of the second black matrix opening onto the substrate is located within the projection of the color filter layer onto the substrate.

7. The display panel according to claim 4, characterized in that, The reflective layer further includes a first signal line, which is located between the substrate and the light-emitting layer.

8. The display panel according to claim 7, characterized in that, It also includes a driving circuit layer, in which the first signal line is located. The driving circuit layer also includes a pixel circuit, which is electrically connected to the sub-pixel. The first signal line is electrically connected to the pixel circuit.

9. The display panel according to claim 4, characterized in that, The reflective layer further includes a second signal line and a touch electrode, the second signal line and the touch electrode being located between the light-emitting layer and the filter layer; The display panel further includes a touch layer located between the light-emitting layer and the filter layer. The second signal line and the touch electrode are located in the touch layer, and the second signal line is electrically connected to the touch electrode.

10. The display panel according to claim 1, characterized in that, A second display area is also formed, and the first display area is adjacent to the second display area. The light transmittance of the first display area is greater than that of the second display area.

11. A display device, characterized in that, Includes the display panel and photosensitive element as described in any one of claims 1 to 10; The photosensitive element is located on the side of the substrate opposite to the reflective layer, or the photosensitive element is located in the display panel; The projection of the photosensitive element onto the substrate is located in the first display area.

Images