CN113675248B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113675248B CN113675248B CN202110935602.6A CN202110935602A CN113675248B CN 113675248 B CN113675248 B CN 113675248B CN 202110935602 A CN202110935602 A CN 202110935602A CN 113675248 B CN113675248 B CN 113675248B
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- 230000007704 transition Effects 0.000 claims abstract description 112
- 238000002834 transmittance Methods 0.000 claims abstract description 101
- 239000000758 substrate Substances 0.000 claims abstract description 45
- 230000007423 decrease Effects 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims description 44
- 239000011159 matrix material Substances 0.000 claims description 38
- 230000000007 visual effect Effects 0.000 abstract description 7
- 239000011358 absorbing material Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
- 239000012780 transparent material Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
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- 239000004642 Polyimide Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
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- 238000010438 heat treatment Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/15—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission
- H01L27/153—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars
- H01L27/156—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components with at least one potential-jump barrier or surface barrier specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
Abstract
The invention provides a display panel and a display device, the display panel includes: a substrate; a plurality of light emitting units located at one side of the substrate; the light shielding layer is positioned at one side of the light emitting unit far away from the substrate and is provided with a light shielding area and an opening area, and the vertical projection of the light emitting unit on the substrate is positioned in the vertical projection of the opening area on the substrate; the light shielding layer further comprises a transition region, the transition region is located between the light shielding region and the opening region, and the transmittance of the portion of the light shielding layer located in the transition region is larger than that of the portion of the light shielding layer located in the light shielding region. The invention provides a display panel and a display device, which are used for realizing the gradual decrease of the transmittance of a shading layer along the direction of an opening area pointing to the shading area, so that the brightness of a visual angle is slowly reduced.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
The display technology is widely applied to televisions, mobile phones and public information display, and display panels for displaying pictures are also various, and can display colorful pictures.
However, the brightness of the display panel is rapidly reduced at a large viewing angle, affecting the user experience.
Disclosure of Invention
The invention provides a display panel and a display device, which are used for realizing the gradual decrease of the transmittance of a shading layer along the direction of an opening area pointing to the shading area, so that the brightness of a visual angle is slowly reduced.
In a first aspect, an embodiment of the present invention provides a display panel, including:
a substrate;
a plurality of light emitting units located at one side of the substrate;
the light shielding layer is positioned at one side of the light emitting unit far away from the substrate and is provided with a light shielding area and an opening area, and the vertical projection of the light emitting unit on the substrate is positioned in the vertical projection of the opening area on the substrate;
the light shielding layer further comprises a transition region, the transition region is located between the light shielding region and the opening region, and the transmittance of the portion of the light shielding layer located in the transition region is larger than that of the portion of the light shielding layer located in the light shielding region.
In a second aspect, an embodiment of the present invention provides a display device, including the display panel in the first aspect.
The embodiment of the invention provides a display panel, which comprises a shading layer covering a plurality of light emitting units, wherein the shading layer is provided with a shading area, an opening area and a transition area, the transition area is positioned between the shading area and the opening area, and the transmittance of the transition area is positioned between the transmittance of the shading area and the transmittance of the opening area. Accordingly, the transmittance of the light shielding layer gradually decreases along the direction in which the opening region points to the light shielding region, so that the viewing angle brightness slowly decreases.
Drawings
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the area S1 in FIG. 1;
FIG. 3 is a schematic cross-sectional view along the direction AA' in FIG. 2;
FIG. 4 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 6 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
fig. 7 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 9 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
fig. 10 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
fig. 12 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 13 is a schematic cross-sectional view of another display panel according to an embodiment of the present invention;
FIG. 14 is a graph showing the transmittance of the transition region as a function of distance from the opening region;
FIG. 15 is a schematic view of a view angle luminance decay curve;
fig. 16 is a schematic diagram of a display device according to an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Fig. 1 is a schematic top view of a display panel according to an embodiment of the present invention, fig. 2 is an enlarged schematic view of an S1 region in fig. 1, fig. 3 is a schematic cross-sectional view along an AA' direction in fig. 2, and referring to fig. 1-3, the display panel includes a substrate 10, a plurality of light emitting units 20 and a light shielding layer 30. The plurality of light emitting units 20 are located at one side of the substrate, and the light emitting units 20 are used for light emitting display. The light emitting unit 20 may include, for example, an organic light emitting unit or an inorganic light emitting unit, which may include, for example, a light emitting diode. The light shielding layer 30 is located on a side of the light emitting unit 20 away from the substrate 10, and the light shielding layer 30 is provided with a light shielding region 31 and an opening region 32. The vertical projection of the light emitting unit 20 on the substrate 10 is located within the vertical projection of the opening area 32 on the substrate 10. The light shielding region 31 is an opaque region in the light shielding layer 30, and the opening region 32 is a light transmitting region in the light shielding layer 30. The light emitted from the light emitting unit 20 irradiates the light shielding region 31, and is reflected or absorbed by the light shielding region 31. The light emitted from the light emitting unit 20 irradiates the opening area 32, passes through the opening area 32, and then continues to propagate. The light shielding layer 30 further includes a transition region 33, and the transition region 33 is located between the light shielding region 31 and the opening region 32. The transmittance of the portion of the light shielding layer 30 located at the transition region 33 is greater than the transmittance of the portion of the light shielding layer 30 located at the light shielding region 31. The transmittance of the portion of the light shielding layer 30 located at the transition region 33 is smaller than the transmittance of the portion of the light shielding layer 30 located at the opening region 32.
The embodiment of the invention provides a display panel, which comprises a shading layer 30 covering a plurality of light emitting units 20, wherein the shading layer 30 is provided with a shading area 31, an opening area 32 and a transition area 33, the transition area 33 is positioned between the shading area 31 and the opening area 32, and the transmittance of the transition area 33 is positioned between the transmittance of the shading area 31 and the transmittance of the opening area 32. Accordingly, the transmittance of the light shielding layer 30 gradually decreases along the direction in which the opening region 32 points to the light shielding region 31, so that the viewing angle luminance slowly decreases. When the light-emitting brightness of the light-emitting units drops sharply under a large viewing angle, it is difficult to ensure that brightness decay curves of the light-emitting units with different colors (such as red, green and blue) are the same, if the brightness proportion between the light-emitting units with different colors changes greatly, a serious color cast problem can be generated. In addition, the light shielding layer can prevent color mixing and reduce halation, and meanwhile, the brightness of a large viewing angle is not excessively sacrificed, so that the effect of increasing the viewing angle is achieved. The viewing angle brightness refers to the brightness of the display panel under a certain viewing angle.
The transition zone may be annular in shape, may be a plurality of segments distributed along the annular shape, or may be a rim located at a portion of the open area. Taking the shape of the transition region as an annular shape as an example, the width of the transition region in the radial direction may be substantially the same for the transition region located in the same opening region, or may be wider in the radial direction in a part of the regions, and narrower in the radial direction in other regions. The shape of the transition region may be the same as the shape of the open region, for example, the open region may be rectangular, the transition region may be a rectangular ring, or the open region may be circular, the transition region being a circular ring. The shape of the transition region may be different from the shape of the open region, such as the open region being rectangular and the transition region being annular with an outer circumference and an inner circumference.
Alternatively, referring to fig. 1 to 3, the transmittance of the transition region 33 gradually decreases along the direction in which the opening region 32 points toward the light shielding region 31. In the embodiment of the present invention, different positions in the transition region 33 have different transmittance, and the transmittance is higher at the position in the transition region 33 closer to the opening region 32; the transmittance is lower at a position farther from the opening region 32 in the transition region 33. Thus, along the direction in which the opening region 32 points to the light shielding region 31, the transmittance of the opening region 32 is greater than the transmittance of the transition region 33, the transmittance of the transition region 33 is greater than the transmittance of the light shielding region 31, and the transmittance of the light shielding layer 30 gradually decreases. On this basis, the transmittance of the transition region 33 gradually decreases along the direction in which the opening region 32 points to the light shielding region 31, and the viewing angle luminance gradually decreases in the transition region 33. In other embodiments, the transmittance of the transition region 33 is constant, and the transmittance of the transition region 33 is greater than the transmittance of the light shielding region 31.
In some embodiments, the transmittance of the transition region 33 may continuously be gradually changed and gradually decreased along the direction in which the opening region 32 is directed toward the light shielding region 31.
Fig. 4 is a schematic cross-sectional structure of another display panel according to an embodiment of the present invention, referring to fig. 4, the light shielding layer 30 includes a black matrix 40, the black matrix 40 includes a main body 41 and a graded portion 42, the main body 41 is located in the light shielding region 31, and the graded portion 42 is located in the transition region 33. The opening formed in the black matrix 40 is located in the opening area 32. The thickness of the gradation portion 42 gradually increases along the direction in which the opening area 32 points toward the light shielding area 31. In the embodiment of the present invention, on the basis of the black matrix 40 of the existing display panel, the black matrix 40 adjacent to the opening area 32 is thinned to form a certain gradient, so that the thickness of the gradual change portion 42 gradually increases along the direction in which the opening area 32 points to the light shielding area 31. In the embodiment of the invention, the structure is improved on the basis of the black matrix 40 of the existing display panel, and a new structure is not added, so that the thickness of the display panel is not increased, and the manufacturing difficulty of the display panel is not obviously increased.
The black matrix 40 includes a black light absorbing material. Illustratively, the black light absorbing material includes an irreversible temperature change material that changes to black upon heating. The black light absorbing material may also include resins, reactive diluents, solvents, photoinitiators, and the like. The reactive diluent mainly refers to a low molecular weight epoxy compound containing an epoxy resin group, and the low molecular weight epoxy compound can participate in the curing reaction of the epoxy resin and become a part of a crosslinked network structure of an epoxy resin cured product.
Alternatively, referring to fig. 4, the thickness of the gradation portion 42 increases linearly along the direction in which the opening area 32 points toward the light shielding area 31. In the embodiment of the present invention, the gradual change portion 42 is triangular, the surface of the gradual change portion 42 adjacent to the opening area 32 is a plane, and the surface of the gradual change portion 42 adjacent to the opening area 32 intersects with the plane of the substrate 10.
Fig. 5 is a schematic cross-sectional view of another display panel according to an embodiment of the invention, and referring to fig. 5, the thickness of the graded portion 42 increases non-linearly along the direction in which the opening region 32 points to the light shielding region 31. And the thickness change rate of the portion of the gradation portion 42 adjacent to the opening section 32 is smaller than the thickness change rate of the portion of the gradation portion 42 adjacent to the light shielding section 31. The thickness of the a position in the gradation portion 42 refers to the length of the gradation portion 42 at the a position in the direction perpendicular to the substrate 10. The thickness change rate is a ratio between the amount of change in thickness and the amount of change in horizontal distance. Wherein the horizontal distance is the distance in the horizontal direction, which is parallel to the plane of the substrate 10. In the embodiment of the present invention, the surface of the graded portion 42 adjacent to the opening area 32 is a curved surface.
Illustratively, referring to fig. 5, the surface of the gradation portion 42 on the side adjacent to the opening area 32 is a paraboloid, which corresponds to a quadratic function. The derivative of the parabola corresponds to a linear function, and the derivative of the parabola gradually increases along the direction in which the opening area 32 points to the light shielding area 31, and the thickness change rate of the gradation portion 42 gradually increases. Of course, the surface of the gradual change portion 42 adjacent to the opening area 32 may be other curved surfaces, such as a round surface, an oval surface, etc.
In some embodiments, the transmittance of the transition region 33 may be stepwise graded and gradually reduced along the direction in which the opening region 32 points toward the light shielding region 31.
Fig. 6 is a schematic cross-sectional view of another display panel according to an embodiment of the invention, and referring to fig. 6, the thickness of the graded portion 42 increases stepwise along the direction in which the opening region 32 points to the light shielding region 31. In the embodiment of the present invention, the surface of the gradual change portion 42 adjacent to the side of the opening area 32 is stepped. The thickness of the gradation portion 42 is uniform within the same step. The gradation portion 42 has different thicknesses in different steps. The thickness of the gradation portion 42 increases stepwise along the direction in which the opening area 32 points to the light shielding area 31.
Fig. 7 is a schematic cross-sectional structure of another display panel according to an embodiment of the present invention, referring to fig. 7, the light shielding layer 30 includes a black matrix 40, the black matrix 40 includes a main body 41 and a graded portion 42, the main body 41 is located in the light shielding region 31, and the graded portion 42 is located in the transition region 33. The gradual change portion 42 is provided with a plurality of grooves 43, and the depth H of the grooves 43 gradually decreases along the direction in which the opening region 32 points to the light shielding region 31. Wherein the depth H of the groove 43 is the length of the groove 43 in a direction perpendicular to the substrate 10. In the embodiment of the present invention, the surface of the black matrix 40 of the conventional display panel is provided with the groove 43, the depth H of the groove 43 is larger at the position closer to the opening area 32, the transmittance of the graded portion 42 is larger, and the depth H of the groove 43 is smaller at the position farther from the opening area 32, and the aperture ratio of the graded portion 42 is smaller. Thus, the transmittance of the transition region 33 at the position of each groove 43 gradually decreases along the direction in which the opening region 32 points to the light shielding region 31, and in the transition region 33, the viewing angle luminance gradually decreases.
Fig. 8 is a schematic cross-sectional structure of another display panel according to an embodiment of the present invention, and referring to fig. 8, the display panel further includes a high-transmittance material layer 50, where the high-transmittance material layer 50 fills the openings formed in the black matrix 40. Wherein the transmittance of the high transmittance material layer 50 is greater than the transmittance of the black matrix 40. In one embodiment, the high-transmittance material layer 50 is formed on the substrate 10, and then the black matrix 40 is formed, wherein the high-transmittance material layer 50 provides a slope, and the black matrix 40 formed on the high-transmittance material layer 50 corresponds to the graded portion 42. In another embodiment, the black matrix 40 is formed on the opposite substrate, and then the high transmittance material layer 50 is formed. The openings formed by the black matrix 40 are filled with the high-transmittance material layer 50, so that the high-transmittance material layer 50 is in contact with and overlapped with the gradual change portion 42 of the black matrix 40, and a flat surface is formed on the surface of the high-transmittance material layer 50 away from the gradual change portion 42, which is beneficial to forming other film layers on the high-transmittance material layer 50.
Illustratively, referring to fig. 8, the high transmittance material layer 50 is a transparent material layer, and the transmittance of the high transmittance material layer 50 is greater than 90%. The high-transmittance material layer 50 may include an organic transparent material, for example, a material of a sub-gram force system, a resin system, a polyimide system. The high transmittance material layer 50 may also include an inorganic transparent material. In other embodiments, the high-transmittance material layer 50 is a color resist.
Optionally, referring to fig. 8, the display panel further includes a plurality of color resistors 60 (illustrated in fig. 8 as one color resistor 60), where the color resistors 60 are located in the opening area 32, and the color resistors 60 are used to selectively filter the light passing therethrough. The color resist 60 is located between the high transmittance material layer 50 and the light emitting unit 20. In the embodiment of the present invention, the display panel further includes a plurality of color resists 60, and the light emitted by the light emitting unit 20 passes through the color resists 60 and the high-transmittance material layer 50 and then exits the display panel.
In one embodiment, the color resist 60 is located in the opening region 32 and extends from the opening region 32 to the transition region 33. That is, the color resist 60 is located in the opening region 32 and the transition region 33.
Illustratively, referring to fig. 8, the black matrix 40 includes a main body portion 41 and a gradation portion 42, and an area of a side surface of the black matrix 40 remote from the substrate 10 is larger than an area of a side surface of the black matrix 40 adjacent to the substrate 10. The surface of the gradation portion 42 on the side adjacent to the opening area 32 is disposed toward the substrate 10.
Fig. 9 is a schematic cross-sectional structure of another display panel according to an embodiment of the present invention, and referring to fig. 9, the black matrix 40 includes a main body portion 41 and a graded portion 42, and an area of a side surface of the black matrix 40 away from the substrate 10 is smaller than an area of a side surface of the black matrix 40 adjacent to the substrate 10. The surface of the graded portion 42 adjacent to the side of the open area 32 is disposed away from the substrate 10.
Fig. 10 is a schematic cross-sectional structure of another display panel according to an embodiment of the present invention, and referring to fig. 10, the display panel further includes a high-transmittance material layer 50, where the high-transmittance material layer 50 fills the openings formed in the black matrix 40. The high transmittance material layer 50 is a color resist 60.
Fig. 11 is a schematic cross-sectional structure of another display panel according to an embodiment of the present invention, referring to fig. 11, the light shielding layer 30 includes a black matrix 40 and a graded material layer 70, the black matrix 40 is located in the light shielding region 31, and the graded material layer 70 is located in the transition region 33. The transmittance of the graded material layer 70 gradually decreases along the direction in which the opening region 32 points to the light shielding region 31. In the embodiment of the present invention, the graded material layer 70 is disposed in the transition region 33, and the transmittance of the graded material layer 70 gradually decreases along the direction in which the opening region 32 points to the light shielding region 31. Thus, in the transition region 33, the viewing angle luminance is slowly reduced.
Fig. 12 is a schematic cross-sectional structure of another display panel according to an embodiment of the present invention, referring to fig. 12, the light shielding layer 30 includes a black matrix 40 and a graded material layer 70, the display panel further includes a high-transmittance material layer 50 and a color resistor 60, and the high-transmittance material layer 50 fills an opening formed in the black matrix 40. The transmittance of the high transmittance material layer 50 is greater than that of the black matrix 40. The color resist 60 is located in the opening area 32. The color resist 60 is located between the high transmittance material layer 50 and the light emitting unit 20.
Fig. 13 is a schematic cross-sectional structure of another display panel according to an embodiment of the present invention, referring to fig. 13, the light shielding layer 30 includes a black matrix 40 and a graded material layer 70, and the display panel further includes a high-transmittance material layer 50, where the high-transmittance material layer 50 fills an opening formed in the black matrix 40. The transmittance of the high transmittance material layer 50 is greater than that of the black matrix 40. The high transmittance material layer 50 is a color resist 60.
In the art, in the conventional display panel, the ratio of red, green and blue (RGB) is changed under different viewing angles, which causes color shift of white color coordinates. The different microcavity effects corresponding to different wavelengths lead to the fact that the light with larger wavelength has larger luminous brightness and the light with smaller wavelength has smaller brightness under the same visual angle. The existing display panel has the problem of visual character deviation.
Alternatively, referring to fig. 2 and 3, the plurality of light emitting units 20 include a first light emitting unit 21 and a second light emitting unit 22, and the light emitting wavelength of the first light emitting unit 21 is longer than the light emitting wavelength of the second light emitting unit 22. In a direction perpendicular to the substrate 10, the transition region 33 surrounding the first light emitting unit 21 is a first transition region 331 and the transition region 33 surrounding the second light emitting unit 22 is a second transition region 332. Along the direction in which the opening region 32 points to the light shielding region 31, the width of the first transition region 331 is W1, and the width of the second transition region 332 is W2. W1 is less than W2. In the embodiment of the invention, the width of the first transition area 331 is smaller than that of the second transition area 332, and the change rate of the transmittance of the first transition area 331 is larger than that of the second transition area 332 along the direction that the opening area 32 points to the shading area 31, the change rate of the transmittance of the first transition area 331 is larger than that of the second transition area 332 along the distance, the change rate of the transmittance of the first transition area 331 along the distance is larger than that of the transmittance of the second transition area 332 along the distance, the change of the transmittance of the first transition area 331 from 1 to 0 is realized in a shorter distance, and the change of the transmittance of the second transition area 332 from 1 to 0 is realized in a longer distance, so that the change rate of the shading degree of the first transition area 331 on the first light emitting unit 21 is larger than that of the second transition area 332 on the second light emitting unit 22, namely, the compensation of the wavelength along with the change of the brightness of the visual angle is realized, and the problem of color cast of the visual angle is alleviated.
Alternatively, referring to fig. 2 and 3, the plurality of light emitting units 20 further includes a third light emitting unit 23, and the light emitting wavelength of the second light emitting unit 22 is greater than the light emitting wavelength of the third light emitting unit 23. The transition region 33 surrounding the third light emitting unit 23 in a direction perpendicular to the substrate 10 is a third transition region 333. The width of the third transition region 333 is W3 along the direction in which the opening region 32 points to the light shielding region 31. W2 is less than W3. In the embodiment of the present invention, the width of the second transition region 332 is smaller than the width of the third transition region 333, and the transmittance of the second transition region 332 is greater than the transmittance of the third transition region 333 along the direction in which the opening region 32 points to the light shielding region 31, and the transmittance of the second transition region 332 is greater than the transmittance of the third transition region 333 along the distance, and the transmittance of the second transition region 332 is changed from 1 to 0 within a shorter distance, and the transmittance of the third transition region 333 is changed from 1 to 0 within a longer distance, so that the transmittance of the second transition region 332 to the third light emitting unit 22 is greater than the transmittance of the third transition region 333 to the third light emitting unit 23, that is, the compensation of the wavelength along with the change of the brightness of the viewing angle is realized, thereby alleviating the problem of color cast of the viewing angle.
For example, referring to fig. 2 and 3, the first light emitting unit 21 emits red light, the second light emitting unit 22 emits green light, and the third light emitting unit 23 emits blue light.
A driving circuit layer may be further disposed between the substrate 10 and the light emitting unit 20, and the driving circuit layer may include a plurality of thin film transistors for driving the light emitting unit 20 to emit light. The thin film transistors constitute a pixel circuit, and the pixel circuit drives the light emitting unit 20 to emit light.
Fig. 14 is a schematic view showing the transmittance of the transition region as a function of the distance from the opening region, and referring to fig. 14, the abscissa "distance" refers to the distance from the opening region 32. "R" refers to red light, "G" refers to green light, and "B" refers to blue light. Fig. 14 illustrates transmittance of transition regions corresponding to red, green, and blue light. As can be seen from fig. 14, the transmittance of the transition region corresponding to "R" varies the fastest with distance, the transmittance of the transition region corresponding to "G" varies the second time with distance, and the transmittance of the transition region corresponding to "B" varies the slowest with distance. The distance when the transmittance of the transition region corresponding to "R" is 0 is smaller than the distance when the transmittance of the transition region corresponding to "G" is 0, and the distance when the transmittance of the transition region corresponding to "G" is 0 is smaller than the distance when the transmittance of the transition region corresponding to "B" is 0.
With continued reference to fig. 2 and 3, the line between the edge of the light emitting unit 20 adjacent to the transition region 33 and the edge of the transition region 33 adjacent to the opening region 32 is a first line, and the angle between the first line and the normal line of the substrate is θ 1 . The line between the edge of the light emitting unit 20 near the transition region 33 and the edge of the transition region 33 near the light shielding region 31 is a second line, and the included angle between the second line and the normal line of the substrate is theta 2 . Wherein the substrate normal is perpendicular to the substrate 10.θ 1 Greater than 0 DEG theta 2 Less than 70 DEG theta 1 Less than theta 2 . In the embodiment of the invention, θ 1 Above 0 °, the area of the opening region 32 is larger than the area of the light emitting unit 20, and the light emitted by the light emitting unit 20 along the substrate normal direction is not blocked by the transition region 33, i.e. it is ensured that the normal angle light is not blocked by the transition region 33.θ 2 Less than 70 degrees, along the direction that the opening area 32 points to the shading area 31, the width of the transition area 33 is not too large, so that the light emitted by the light emitting unit 20 under a large visual angle can irradiate the shading area 31 and be shielded by the shading area 31, and the purpose of preventing light crosstalk is achieved.
Fig. 15 is a schematic view of a view angle luminance decay curve, referring to fig. 15, the ordinate "L/L0" represents the ratio of luminance at a specific view angle to luminance at a front view angle. "original scheme" represents the view angle luminance decay curve of the existing display panel in which no transition region is provided, at θ 3 There is a steep drop in the luminance decay nearby, i.e. at θ 3 The brightness changes drastically in the vicinity. Wherein θ 3 The third connecting line is the connecting line between the edge of the light emitting unit 20 near the shielding region 31 and the edge of the shielding region 31 near the opening region 32, which is the included angle between the third connecting line and the normal line of the substrate in the conventional display panel. θ 3 Greater than theta 1 ，θ 3 Less than theta 2 . The "present embodiment" represents the view angle luminance decay curve of the display panel according to the present invention, and it can be seen that, compared with the existing display panel, the display panel according to the present invention has the following characteristics 3 The luminance decay is more gradual in the vicinity. The luminance decay at each viewing angle is also more gradual, and the viewing angle luminance is slowly reduced.
The embodiment of the invention also provides a display device. Fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present invention, and referring to fig. 16, the display device includes any one of the display panels according to the embodiment of the present invention. The display device can be a mobile phone, a tablet personal computer, a vehicle-mounted display device, intelligent wearable equipment and the like.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (12)
1. A display panel, comprising:
a substrate;
a plurality of light emitting units located at one side of the substrate;
the light shielding layer is positioned at one side of the light emitting unit far away from the substrate and is provided with a light shielding area and an opening area, and the vertical projection of the light emitting unit on the substrate is positioned in the vertical projection of the opening area on the substrate;
the light shielding layer further comprises a transition region, the transition region is positioned between the light shielding region and the opening region, and the transmittance of the part of the light shielding layer positioned in the transition region is larger than that of the part positioned in the light shielding region;
the plurality of light emitting units comprise a first light emitting unit and a second light emitting unit, and the light emitting wavelength of the first light emitting unit is larger than that of the second light emitting unit;
in the direction perpendicular to the substrate, a transition region surrounding the first light-emitting unit is a first transition region, and a transition region surrounding the second light-emitting unit is a second transition region;
and the width of the first transition area is smaller than that of the second transition area along the direction that the opening area points to the shading area.
2. The display panel of claim 1, wherein the transmittance of the transition region gradually decreases along a direction in which the opening region points toward the light shielding region.
3. The display panel according to claim 2, wherein the light shielding layer includes a black matrix including a main body portion and a gradation portion, the main body portion being located in the light shielding region, the gradation portion being located in the transition region;
the thickness of the gradual change part gradually increases along the direction that the opening area points to the shading area.
4. A display panel according to claim 3, wherein the thickness of the gradation portion increases linearly along the direction in which the opening area points to the light shielding area.
5. A display panel according to claim 3, wherein the thickness of the gradation portion increases non-linearly along the direction in which the opening area is directed toward the light shielding area, and the rate of change in thickness of a portion of the gradation portion adjacent to the opening area is smaller than the rate of change in thickness of a portion of the gradation portion adjacent to the light shielding area.
6. A display panel according to claim 3, wherein the thickness of the gradation portion increases stepwise along the direction in which the opening area points to the light shielding area.
7. The display panel according to claim 2, wherein the light shielding layer includes a black matrix including a main body portion and a gradation portion, the main body portion being located in the light shielding region, the gradation portion being located in the transition region;
the gradual change portion is provided with a plurality of grooves, the depth of each groove gradually decreases along the direction of the opening area pointing to the shading area, and the depth of each groove is the length of each groove in the direction perpendicular to the substrate.
8. The display panel according to claim 3 or 7, further comprising a high-transmittance material layer filling the openings opened in the black matrix;
wherein the transmittance of the high transmittance material layer is greater than the transmittance of the black matrix.
9. The display panel of claim 8, further comprising a plurality of color resistors located in the open area between the high transmittance material layer and the light emitting cells.
10. The display panel of claim 2, wherein the light shielding layer comprises a black matrix and a graded material layer, the black matrix being located within the light shielding region, the graded material layer being located within the transition region;
the transmittance of the graded material layer gradually decreases along the direction that the opening area points to the shading area.
11. The display panel according to claim 1, wherein a line between an edge of the light emitting unit adjacent to the transition region and an edge of the transition region adjacent to the opening region is a first line, and an angle between the first line and a normal line of the substrate is θ 1 ；
The connecting line between the edge of the light-emitting unit adjacent to one side of the transition area and the edge of the transition area adjacent to one side of the shading area is a second connecting line, and the included angle between the second connecting line and the normal line of the substrate is theta 2 ；
θ 1 Greater than 0 DEG theta 2 Less than 70 deg..
12. A display device comprising the display panel of any one of claims 1-11.
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| CN202110935602.6A CN113675248B (en) | 2021-08-16 | 2021-08-16 | Display panel and display device |
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| CN113675248B true CN113675248B (en) | 2024-02-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239830A (en) * | 2018-11-15 | 2019-01-18 | 上海天马微电子有限公司 | Optical film, display panel and display device |
| CN110246872A (en) * | 2019-04-26 | 2019-09-17 | 昆山工研院新型平板显示技术中心有限公司 | Display panel and display device |
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| KR20210047499A (en) * | 2019-10-22 | 2021-04-30 | 엘지디스플레이 주식회사 | Display device having black matrix layer with variable light shielding unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109239830A (en) * | 2018-11-15 | 2019-01-18 | 上海天马微电子有限公司 | Optical film, display panel and display device |
| CN110246872A (en) * | 2019-04-26 | 2019-09-17 | 昆山工研院新型平板显示技术中心有限公司 | Display panel and display device |
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