CN113160711A - Display panel and display device - Google Patents
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- CN113160711A CN113160711A CN202110472498.1A CN202110472498A CN113160711A CN 113160711 A CN113160711 A CN 113160711A CN 202110472498 A CN202110472498 A CN 202110472498A CN 113160711 A CN113160711 A CN 113160711A
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- 239000011241 protective layer Substances 0.000 claims abstract description 31
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- 238000004020 luminiscence type Methods 0.000 description 4
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The application provides a display panel and a display device, and relates to the technical field of display. The display panel includes: the light-emitting element layer comprises at least one light-emitting unit group, and any light-emitting unit group comprises a plurality of sub-light-emitting elements; a microlens structure layer located on the light emitting surface side of the light emitting element layer facing the display panel; comprises at least one micro lens corresponding to the sub-luminous element; the planarization layer is positioned on one side of the micro-lens structure layer, which is far away from the light-emitting element layer, and at least covers the micro-lens; the refractive index of the planarization layer is smaller than that of the microlens; a protective layer at least between the microlens structure layer and the light emitting element layer; the protective layer has a refractive index less than the refractive index of the planarization layer. Therefore, the adjustment of the display brightness of the sub-luminous elements emitted to the light emitting surface of the display panel and the luminous light shape of the emergent light is realized, so that the problem of poor uniformity of the display brightness of the display panel is weakened or even eliminated, and the display effect of the display panel is improved.
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
With the development of society and the advancement of technology, display devices are required to be used in more and more living environments and working environments, and the requirements of users on the display effects of the display devices, such as resolution, brightness uniformity, and the like, are also higher and higher. In a general display device, a pixel is constituted by three color sub-pixels of red, green, and blue representing three primary colors of light, and color display of the display device is realized. However, the red sub-pixel, the green sub-pixel, and the blue sub-pixel have different emission patterns, which causes a problem that the display device has poor uniformity of brightness. Therefore, it is desirable to provide a display device capable of ensuring uniformity of display brightness.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display device, so as to solve the problems of poor uniformity of display brightness and low resolution of the current display device.
In a first aspect, the present application provides a display panel comprising:
the light-emitting element layer comprises at least one light-emitting unit group, and any light-emitting unit group comprises a plurality of sub-light-emitting elements;
a microlens structure layer located on a light emitting surface side of the light emitting element layer facing the display panel; comprises at least one micro lens corresponding to the sub-luminous element;
the planarization layer is positioned on one side of the micro-lens structure layer, which is far away from the light-emitting element layer, and at least covers the micro-lens; the refractive index of the planarization layer is smaller than that of the micro lens;
a protective layer at least between the microlens structure layer and the light emitting element layer; the protective layer has a refractive index less than a refractive index of the planarization layer.
In a second aspect, the present application provides a display device comprising a display panel.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
the application provides a display panel and a display device, wherein a micro lens is arranged in the light emitting direction of at least part of sub-light emitting pieces, and the emergent light angle of the emergent light is adjusted through the refraction effect of the micro lens on the emergent light of the sub-light emitting pieces; meanwhile, the refractive index relation between the planarization layer and the micro lens and the refractive index relation between the protective layer and the planarization layer in the panel are adjusted, so that the light emergent angle of the emergent light is further adjusted when the light emitted by the sub-luminous element passes through the interface between the protective layer and the planarization layer and the interface between the micro lens and the planarization layer, the emergent angle of the emergent light is converged towards the direction vertical to the light emergent surface of the display panel when the emergent light is emitted from the planarization layer to the outside, and the front-view display brightness of the sub-luminous element is further improved; namely, the adjustment of the display brightness of each sub-luminous piece and the luminous light type of the emergent light is realized, so that the problem of poor uniformity of the display brightness of the display panel is weakened or even eliminated, and the display effect of the display panel is improved.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic diagram of a prior art red sub-pixel emission pattern;
FIG. 2 is a diagram illustrating a prior art green/blue sub-pixel emission pattern;
fig. 3 is a schematic view of a display panel according to an embodiment of the present disclosure;
FIG. 4 is an AA' cross-sectional view of FIG. 3 according to an embodiment of the present application;
fig. 5 is another schematic view of a display panel according to an embodiment of the present disclosure;
FIG. 6 is another cross-sectional view AA' of FIG. 3 according to an embodiment of the present application;
FIG. 7 is another cross-sectional view AA' of FIG. 3 according to an embodiment of the present application;
FIG. 8 is another cross-sectional view AA' of FIG. 3 according to an embodiment of the present application;
FIG. 9 is another cross-sectional view AA' of FIG. 3 according to an embodiment of the present application;
FIG. 10 is another cross-sectional view AA' of FIG. 3, as provided in accordance with an embodiment of the present application;
FIG. 11 is a top view of area B of FIG. 3 according to an embodiment of the present disclosure;
FIG. 12 is a top view of area C of FIG. 5 according to an exemplary embodiment of the present disclosure;
fig. 13 is a schematic view of a display device according to an embodiment of the present disclosure.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
With the development of society and the advancement of technology, display devices are required to be used in more and more living environments and working environments, and the requirements of users on the display effects of the display devices, such as resolution, brightness uniformity, and the like, are also higher and higher. In a general display device, a pixel is constituted by three color sub-pixels of red, green, and blue representing three primary colors of light, and color display of the display device is realized. However, the red sub-pixel, the green sub-pixel, and the blue sub-pixel have different emission patterns, which causes a problem that the display device has poor uniformity of brightness. Therefore, it is desirable to provide a display device capable of ensuring uniformity of display brightness.
Fig. 1 is a schematic diagram of a red sub-pixel light-emitting pattern in the prior art, fig. 2 is a schematic diagram of a green/blue sub-pixel light-emitting pattern in the prior art, please refer to fig. 1 and fig. 2, it should be noted that 91 in fig. 1 represents the light-emitting pattern of the red sub-pixel, and 92 in fig. 2 represents the light-emitting pattern of the green/blue sub-pixel; specifically, the light emission pattern 91 of the red sub-pixel has a light quantity of X1 in a direction perpendicular to the light exit surface of the display panel and a light quantity of Y1 in a position 20 ° (70 °/110 ° shown in fig. 1) away from the direction perpendicular to the light exit surface of the display panel, where X1 < Y1; the light emission pattern 92 of the green/blue sub-pixels has a light quantity of X2 in a direction perpendicular to the light exit surface of the display panel and a light quantity of Y2 in a position 20 ° (70 °/110 ° shown in fig. 2) away from the direction perpendicular to the light exit surface of the display panel, where X2 > Y2; the front-view display luminance for the red sub-pixel is lower than the front-view display luminance for the green/blue sub-pixels. That is, the emission light pattern of the red sub-pixel is not consistent with that of the green/blue sub-pixels, and the display luminance of the red sub-pixel is lower than that of the green/blue sub-pixels.
In view of the above, the present invention provides a display panel and a display device, so as to solve the problems of poor uniformity of display brightness and low resolution of the current display device.
Fig. 3 is a schematic diagram of a display panel according to an embodiment of the present application, fig. 4 is an AA' cross-sectional view of fig. 3 according to an embodiment of the present application, and referring to fig. 3 and fig. 4, the present application provides a display panel 100, including:
a light emitting element layer 01 including at least one light emitting element group 10, any one of the light emitting element groups 10 including a plurality of sub light emitting elements 11/12/13;
a microlens structure layer 02 located on the light emitting element layer 01 facing the light emitting surface side of the display panel 100; includes at least one microlens 20 disposed corresponding to the sub-luminous member 11/12/13;
the planarization layer 03 is positioned on one side of the micro-lens structure layer 02 far away from the light-emitting element layer 01, and the planarization layer 03 at least covers the micro-lenses 20; the refractive index of the planarization layer 03 is smaller than that of the microlens 20;
a protective layer 04 at least between the microlens structure layer 02 and the light emitting element layer 01; the refractive index of the protective layer 04 is smaller than that of the planarization layer 03.
Specifically, the present application provides a display panel 100, including a light-emitting element layer 01, a microlens structure layer 02, a planarization layer 03, and a protective layer 04, wherein the light-emitting element layer 01 includes a plurality of light-emitting element groups 10, each light-emitting element group 10 includes a plurality of sub-light-emitting elements 11/12/13, and at least a portion of the sub-light-emitting elements 11/12/13 in each light-emitting element group 10 emit light to implement a display function of the light-emitting element group 10. This application does not do specific limitation to the quantity of luminescence unit group 10 that includes in a display panel 100, and the quantity of sub-luminescent member 11/12/13 in every luminescence unit group 10 can set up to the same, also can set up to different, and this application does not do specific limitation to this yet, and the user can adjust the quantity of luminescence unit group 10, the quantity of sub-luminescent member 11/12/13 in luminescence unit group 10 according to self design demand, production demand etc. to reach the required luminous effect of design.
The microlens structure layer 02 is located on the light emitting element layer 01 facing the light emitting surface side of the display panel 100, and the microlens structure layer 02 includes at least one microlens 20 corresponding to the sub-light emitting member 11/12/13; that is, the micro lens 20 is disposed on a side of the sub light emitting element 11/12/13 facing the light emitting surface of the display panel 100, and is used for changing the direction of the light emitted from the corresponding sub light emitting element 11/12/13, so as to adjust the light emitting type and the front view display brightness of the light emitted from the sub light emitting element 11/12/13, where the front view display brightness is the brightness perpendicular to the display panel. For example, as shown in fig. 4, the micro-lenses 20 are disposed only in the corresponding regions of the sub-light emitting members 11, and the micro-lenses 20 are used to adjust the front-view display brightness of the sub-light emitting members 11 emitted out of the light emitting plane of the display panel 100. However, fig. 4 is only an alternative embodiment provided by the present application, and the present application is not limited to the number of the micro lenses 20 and the corresponding position of the sub-luminous members 11/12/13 on which the micro lenses 20 are disposed.
When the sub-light emitting elements 11/12/13 are disposed with the microlenses 20, the planarization layer 03 is disposed on a side of the microlens structure layer 02 away from the light emitting element layer 01, and the planarization layer 03 covers the microlenses 20 for protecting the microlenses 20; meanwhile, the physical property of the planarization layer 03 is that the refractive index of the planarization layer 03 is smaller than that of the microlens 20, so that the adjustment of the emergent direction of the emergent light of the sub-luminescent piece 11/12/13 covered with the microlens 20 is further realized, and the quantity of the emergent light perpendicular to the emergent surface of the display panel 100 is increased, so that the luminous light type of the emergent light of the sub-luminescent piece 11/12/13 is further adjusted, and the front-view display brightness of the sub-luminescent piece 11/12/13 is further improved. Specifically, the light emitted from the sub-luminous members 11/12/13 passes through the protective layer 04, the microlenses 20, and the planarization layer 03, and is emitted to the light exit surface side of the display panel 100. When the corresponding position of the sub-illuminant 11/12/13 is not provided with the corresponding microlens 20, since the planarization layer 03 is also located in the direction of the light-emitting element layer 01 facing the light-emitting surface of the display panel 100, the protection layer 04 is actually located on the side away from the light-emitting element layer 01, and the planarization layer 03 covers the protection layer 04. At this time, the light emitted from the sub-luminescent material 11/12/13 is emitted to the light emitting surface side of the display panel 100 only through the protective layer 04 and the planarization layer 03.
That is, the display panel 100 provided by the present application includes a protective layer 04, where the protective layer 04 is located between the microlens structure layer 02 and the light emitting element layer 01, and/or located between the planarization layer 03 and the light emitting element layer 01; the present application provides a physical property of the protective layer 04 that the refractive index of the protective layer 04 is smaller than the refractive index of the planarization layer 03. Therefore, when the light emitted from the sub-light-emitting element 11/12/13 passes through the interface between the protection layer 04 and the planarization layer 03, the light emitting angle can be adjusted, so that the light emitting angle when the light is emitted from the planarization layer 03 to the outside approaches to the direction perpendicular to the light emitting surface of the display panel 100, which is beneficial to further adjusting the light emitting type of the emitted light of the sub-light-emitting element 11/12/13 and further improving the front view display brightness of the sub-light-emitting element 11/12/13.
That is, in order to improve the problem of poor uniformity of the display brightness of the display panel 100 caused by the inconsistency of the light emitting patterns of the sub-pixels with different colors in the prior art, the present application arranges the micro lens 20 at the light emitting direction side of at least a part of the sub-light emitting members 11/12/13 with poor display brightness, and adjusts (for example, gathers) the propagation direction of the light through the micro lens 20, so as to enable more light to be emitted in the direction perpendicular to the light emitting surface of the display panel 100, thereby changing the light emitting pattern of the emitted light of the sub-light emitting members 11/12/13 with poor display brightness, increasing the front view display brightness of the sub-light emitting members 11/12/13, so that the front view display brightness of the sub-light emitting members is almost the same as the front view display brightness of the other sub-light emitting members, so as to weaken or even eliminate the problem of poor uniformity of the display brightness of the display panel 100, the display effect of the display panel 100 is improved. And the refractive indexes of the protective layer 04 and the planarization layer 03 are regulated and controlled, so that the emergent light of each sub-luminous element 11/12/13 is further close to the direction perpendicular to the emergent surface of the display panel 100, the overall display brightness of the display panel 100 is further improved, and the overall display effect of the display panel 100 is further improved.
Fig. 5 is another schematic diagram of a display panel according to an embodiment of the present disclosure, fig. 6 is another cross-sectional view of an AA 'of fig. 3 according to an embodiment of the present disclosure, fig. 7 is another cross-sectional view of the AA' of fig. 3 according to an embodiment of the present disclosure, please refer to fig. 3 to 7, and optionally, any light-emitting unit group 10 at least includes a first color sub-light-emitting element 11, a second color sub-light-emitting element 12, and a third color sub-light-emitting element 13;
the micro-lens 20 at least comprises a first micro-lens 21 and a second micro-lens 22, wherein the first micro-lens 21 is arranged corresponding to the first color sub-illuminant 11; the second microlenses 22 are disposed corresponding to the second and/or third color sub-luminous elements 12 and 13;
the radius of curvature of the first microlenses 21 is smaller than the radius of curvature of the second microlenses 22.
Specifically, in the display panel 100 provided by the present application, any one of the light emitting unit groups 10 may include a plurality of sub-light emitting elements 11/12/13, and an alternative arrangement is provided in which each of the light emitting unit groups 10 includes three sub-light emitting elements 11/12/13, and the three sub-light emitting elements 11/12/13 have different colors, namely, a first color sub-light emitting element 11, a second color sub-light emitting element 12, and a third color sub-light emitting element 13. Specifically, in combination with the optical three primary colors, the first, second and third color sub-luminous members 11, 12 and 13 may be arranged to emit red, green and blue light, respectively.
It should be noted that, in the above-mentioned alternative embodiment provided only for the present application, a user may set the number of sub-light emitting elements in each light emitting element group 10 according to actual requirements, for example, each light emitting element group 10 may only include 1 sub-light emitting element, or include 4 sub-light emitting elements, 5 sub-light emitting elements, and the like, which is not specifically limited in this application; in addition, the specific luminescent color of the sub-luminescent member in each luminescent unit group 10 may also be adjusted according to actual requirements, which is not specifically limited in this application.
In the prior art, the light emitting patterns of the red sub-pixel and the green sub-pixel/the blue sub-pixel are not consistent, and the brightness of the viewing angle of the red sub-pixel in the direction vertical to the light emitting surface of the display panel is lower than the position of a deflection angle of 70 degrees/110 degrees, wherein the deflection angle is an angle which is deflected towards the light emitting direction of the display panel counterclockwise and is relative to the light emitting surface of the display panel as a horizontal plane; and the luminous efficiency of the red sub-pixel is lower than that of the green sub-pixel/the blue sub-pixel, so that the display brightness of the red sub-pixel is lower than that of the green sub-pixel/the blue sub-pixel under the condition of the same voltage and current and the same area of the sub-luminous element. Therefore, in the microlens structure layer 02 of the display panel 100 provided by the present application, an optional arrangement manner is to include the first microlens 21 and the second microlens 22; the first microlenses 21 are provided to correspond to the first color sub-luminous member 11 emitting red light, and the second microlenses 22 are provided to correspond to the second color sub-luminous member 12 emitting green light, and/or to correspond to the third color sub-luminous member 13 emitting blue light. The angles of the light rays emitted from at least part of the sub-light-emitting members 11/12/13 are adjusted by the first microlenses 21 and the second microlenses 22, so that the light-emitting shape and the front-view display brightness of the corresponding sub-light-emitting members 11/12/13 are improved, and the display brightness uniformity of the display panel 100 is improved.
It should be noted that, the present application provides a physical property of the first micro-lens 21 and the second micro-lens 22, in which the curvature radius of the first micro-lens 21 is smaller than that of the second micro-lens 22, so that the adjusting force of the first micro-lens 21 to the light emitting direction of the light is greater than that of the second micro-lens 22 to the light emitting direction of the light, and after the first color sub-light emitting element 11 emitting red light passes through the first micro-lens 21, more light is emitted in a direction perpendicular to the light emitting surface of the display panel 100. That is, the radius of curvature of the first microlenses 21 is set to be smaller than the radius of curvature of the second microlenses 22, so that for each of the sub-luminous members 11/12/13, the corresponding increase of the display luminance of the first color sub-luminous member 11 emitting red light in the direction perpendicular to the light emitting surface of the display panel 100 is the largest, and thus the display luminance of the light emitting unit group 10 including the first color sub-luminous member 11, the second color sub-luminous member 12 and the third color sub-luminous member 13 in the display panel 100 is more uniform, the display luminance uniformity of the display panel 100 is better, and the display effect of the display panel 100 is improved.
In addition, when two microlenses 20 are disposed in correspondence to one light emitting unit group 10 in the display panel 100 provided in the present application, it is specifically optional to dispose the first microlenses 21 at positions corresponding to the first color sub-light emitting members 11 that emit red light, and the second microlenses 22 are disposed on one of the second color sub-light emitting members 12 that emit green light and the third color sub-light emitting members 13 that emit blue light, which has lower front-view display luminance, so that the balance of the overall display luminance of the display panel 100 is achieved.
Moreover, the present application does not limit that one microlens 20 is only disposed corresponding to one sub-light emitting element, for example, as shown in fig. 5, one microlens 20 may also correspond to 2 or 3 sub-light emitting elements, and the adjustment of the light type of the emergent light of the sub-light emitting elements is realized through one microlens 20.
It should be noted that, although the orthographic projection shapes of the sub-light-emitting members 11 on the light-emitting surface of the display panel 100 shown in fig. 3 are all circular, the orthographic projection shapes of the sub-light-emitting members 12/13 on the light-emitting surface of the display panel 100 are all rectangular; the orthographic projection shapes of the sub-luminous elements 11/12/13 on the light-emitting surface of the display panel 100 shown in fig. 5 are all rectangular; but are not intended to limit the shape of the sub-emitting members in the display panel 100, and fig. 3 and 5 are only one alternative embodiment provided in the present application.
With reference to fig. 3 to fig. 7, optionally, any light-emitting unit group 10 at least includes a first color sub-light-emitting element 11, a second color sub-light-emitting element 12 and a third color sub-light-emitting element 13;
the micro-lens 20 at least comprises a first micro-lens 21 and a second micro-lens 22, wherein the first micro-lens 21 is arranged corresponding to the first color sub-illuminant 11; the second microlenses 22 are disposed corresponding to the second and/or third color sub-luminous elements 12 and 13;
the refractive index of the first microlenses 21 is greater than the refractive index of the second microlenses 22.
Specifically, each light-emitting unit group 10 is provided with a first color sub-light-emitting element 11, a second color sub-light-emitting element 12 and a third color sub-light-emitting element 13, and the microlenses 20 include first microlenses 21 corresponding to the first color sub-light-emitting element 11, and second microlenses 22 corresponding to the second color sub-light-emitting element 12 and/or the third color sub-light-emitting element 13; the present application further provides that the physical properties of the first micro-lens 21 and the second micro-lens 22 are that the refractive index of the first micro-lens 21 is greater than the refractive index of the second micro-lens 22, so that the adjusting force of the first micro-lens 21 to the light emitting direction is greater than the adjusting force of the second micro-lens 22 to the light emitting direction, and after the first color sub-light emitting element 11 emitting red light passes through the first micro-lens 21, more light is emitted in the direction perpendicular to the light emitting surface of the display panel 100. That is, the refractive index of the first microlens 21 is set to be greater than the refractive index of the second microlens 22, so that for each sub-luminous element 11/12/13, the corresponding increase of the display brightness of the first sub-luminous element 11 which emits red light in the direction perpendicular to the light emitting surface of the display panel 100 is the largest, and thus the display brightness of the light emitting unit group 10 which includes the first sub-luminous element 11, the second sub-luminous element 12 and the third sub-luminous element 13 in the display panel 100 is adjusted to be more uniform, so that the display brightness uniformity of the display panel 100 is better, and the display effect of the display panel 100 is improved.
In addition, when two microlenses 20 are disposed in correspondence to one light emitting unit group 10 in the display panel 100 provided in the present application, it is specifically optional to dispose the first microlenses 21 at positions corresponding to the first color sub-light emitting members 11 emitting red light, and the second microlenses 22 are disposed on the second color sub-light emitting members 12 emitting green light and the third color sub-light emitting members 13 emitting blue light, which are on the lower front-view display luminance, so that the balance of the entire display luminance of the display panel 100 is achieved.
With reference to fig. 3 to fig. 7, optionally, a light shielding layer 05 is further included, and the light shielding layer 05 is located on the protective layer 04; and the light shielding layer 05 includes sub light transmitting portions 50 corresponding to the sub light emitting members 11/12/13 one to one;
the orthographic projection of the sub-light-transmitting portion 50 on the light-emitting surface of the display panel 100 is located within the orthographic projection of the sub-light-emitting member 11/12/13 on the light-emitting surface of the display panel 100.
Specifically, the display panel 100 provided by the present application further includes a light shielding layer 05, and an optional embodiment is provided in which the light shielding layer 05 is disposed in the protective layer 04, that is, the light shielding layer 05 is disposed between the light emitting element layer 01 and the microlens structure layer 02.
Since the light-shielding layer 05 blocks the light from propagating, the light-shielding layer 05 includes sub light-transmitting portions 50 corresponding to the sub light-emitting members 11/12/13, and the sub light-transmitting portions 50 are used for allowing the light emitted by each sub light-emitting member 11/12/13 to exit to the light-exiting surface of the display panel 100 through the protective layer 04.
It should be noted that, in the present application, the orthographic projection of each sub-light-transmitting portion 50 on the light-emitting surface of the display panel 100 is located in the orthographic projection of each sub-light-emitting member 11/12/13 on the light-emitting surface of the display panel 100, that is, the orthographic projection of each sub-light-emitting member 11/12/13 on the light-emitting surface of the display panel 100 is equal to or greater than the orthographic projection of the corresponding sub-light-transmitting portion 50 on the light-emitting surface of the display panel 100, so that the self-light-emitting area of each sub-light-emitting member 11/12/13 is equal to or greater than the orthographic projection of the corresponding sub-light-transmitting portion 50 on the display panel 100, thereby ensuring that the quantity of light rays emitted to the light-emitting surface of the display panel 100 through each sub-light-transmitting portion 50 is the largest, specifically, when compared with the orthographic projection of the sub-light-emitting member 11/12/13 on the light-emitting surface of the display panel 100, that is smaller than the sub-light-transmitting portion 50, the amount of light emitted is greater.
Fig. 8 is another AA ' cross-sectional view of fig. 3 according to an embodiment of the disclosure, fig. 9 is another AA ' cross-sectional view of fig. 3 according to an embodiment of the disclosure, and fig. 10 is another AA ' cross-sectional view of fig. 3 according to an embodiment of the disclosure, referring to fig. 3 to fig. 10, optionally, a thickness D1 of the light shielding layer 05 is less than or equal to a thickness of the protective layer 04 along a direction perpendicular to the light emitting surface of the display panel 100.
Specifically, the present application provides a manner of disposing the light shielding layer 05, in a direction perpendicular to the light emitting surface of the display panel 100, where a thickness D1 of the light shielding layer 05 is less than or equal to a thickness of the protection layer 04. As shown in fig. 8, which is a cross-sectional view of one edge light-emitting unit group 10 in fig. 3, in which, as seen from the area E in fig. 8, the thickness D1 of the light-shielding layer 05 and the thickness of the protective layer 04 are set to be equal in this scheme; the thickness D1 of the light shielding layer 05 is equal to the thickness of the protective layer 04, then the light emitted by each sub-light emitting element 11/12/13 will be emitted from the aperture surrounded by the light shielding layer 05 arranged in the peripheral area, the emitted light of each sub-light emitting element 11/12/13 will not mix with the emitted light of the other sub-light emitting elements 11/12/13 arranged adjacent to the sub-light emitting element, which is beneficial to avoiding the risk of color mixing between the light, thereby being beneficial to improving the color cast problem at large viewing angles, and improving the display effect of the display panel 100.
In addition, as shown in fig. 4/6/7, 9 and 10, the thickness D1 of the light-shielding layer 05 may be smaller than that of the protective layer 04, and the specific arrangement of the light-shielding layer 05 may include three types, as shown in fig. 4/6/7, in which the light-shielding layer 05 is located between the light-emitting element layer 01 and the microlens structure layer 02, and the light-shielding layer 05 is not in direct contact with the light-emitting element layer 01 and the microlens structure layer 02; as shown in fig. 9, the light-shielding layer 05 is located between the light-emitting element layer 01 and the microlens structure layer 02, and the light-shielding layer 05 is disposed in contact with the light-emitting element layer 01; as shown in fig. 10, a light-shielding layer 05 is disposed between the light-emitting element layer 01 and the microlens structure layer 02, and the light-shielding layer 05 is disposed in contact with the microlens structure layer 02/the planarization layer 03. It should be further noted that the orthographic projection of each sub-light emitting element 11/12/13 on the light emitting surface of the display panel 100 is larger than the orthographic projection of each sub-light transmitting portion 50 on the light emitting surface of the display panel 100, that is, the orthographic projection of the light shielding layer 05 on the light emitting surface of the display panel 100 covers at least a part of the edge position of each sub-light emitting element 11/12/13, so that the problem of color mixing of the emergent light between adjacent sub-light emitting elements 11/12/13 can be avoided, and a good display effect of the display panel 100 is ensured.
With reference to fig. 3 to 10, since the thickness D1 of the light shielding layer 05 is less than or equal to the thickness of the passivation layer 04, an optional embodiment is provided in the present application, wherein the thickness of the light shielding layer 05 is D1, and D1 is less than or equal to 10nm and less than or equal to 20 μm; when the thickness D1 of the light-shielding layer 05 is less than 10nm, the light-shielding effect is reduced, and there is a risk that the light cannot be completely shielded; the thickness D1 of the light-shielding layer 05 is required to be equal to or less than the thickness of the protective layer 04, and here, the thickness of the protective layer 04 is generally set to be 1 μm to 20 μm in order to ensure the thin design of the display panel 100, and therefore, the thickness D1 of the light-shielding layer 05 is selected to be not more than 20 μm.
Referring to fig. 4, optionally, the display panel 100 further includes a reflective element 51, the reflective element 51 is located at a side of at least a portion of the sub-light-emitting element 11/12/13 close to the light-shielding layer 05, and an orthogonal projection of the reflective element 51 on the light-emitting surface of the display panel 100 is not overlapped with an orthogonal projection of the sub-light-transmitting portion 50 on the light-emitting surface of the display panel 100.
Specifically, in an embodiment of the display panel 100 including the reflective element 51, the reflective element 51 may be disposed on a side of the sub-light-emitting element 11/12/13 close to the light-shielding layer 05, for example, the reflective element 51 is disposed around an edge of a side surface of the sub-light-emitting element 11/12/13 close to the light-shielding layer 05, wherein an orthographic projection of the reflective element 51 on the light-emitting surface of the display panel 100 and an orthographic projection of the sub-light-transmitting portion 50 on the light-emitting surface of the display panel 100 do not overlap. Because the light emitted by the sub-light-emitting member 11/12/13 exits to the outside of the light-emitting surface of the display panel 100, a part of the light can be reflected back to the light-emitting element layer 01, and the light reflected by the reflecting member 51 is further reflected to the light-emitting surface side of the display panel 100, which is beneficial to improving the utilization rate of the light, improving the luminous intensity of the display panel 100, and improving the display effect of the display panel 100.
Referring to fig. 8, optionally, the display panel 100 further includes a reflector 51;
the light-shielding layer 05 includes a side surface intersecting with the light-emitting surface of the display panel 100;
the reflecting member 51 is located at least partially at the side.
Specifically, light shield layer 05 includes the side, and this side intersects with display panel 100's play plain noodles, and this application still provides a setting mode of reflection piece 51 and is, set up reflection piece 51 in light shield layer 05's side, can be used for the part light of not going out to display panel 100 play plain noodles outward equally, further to the reflection of display panel 100's play plain noodles side, improves the utilization ratio of light, thereby improve display panel 100's luminous intensity, be favorable to promoting display panel 100's display effect.
Referring to fig. 6, in addition, the display panel 100 further includes a substrate 06, each of the sub-light emitting elements 11/12/13 is disposed on the substrate 06, the reflective element 51 may also be disposed on the substrate 06, and the reflective element 51 is disposed around at least a portion of the sub-light emitting elements 11/12/13, for further reflecting a portion of the light toward the light exit surface side of the display panel 100.
It should be noted that the three setting positions of the reflecting member 51 provided above are only several alternative embodiments provided in the present application, and are not used to limit the setting position of the reflecting member 51. The user can adjust the installation position of the reflector 51 according to the actual structural design of the display panel 100, as long as the effect of further reflecting part of the light to the light emitting surface side of the display panel 100 and improving the light emitting intensity of the display panel 100 can be achieved.
Fig. 11 is a top view of a region B in fig. 3 according to an embodiment of the present disclosure, and fig. 12 is a top view of a region C in fig. 5 according to an embodiment of the present disclosure, please refer to fig. 3 to fig. 12, where optionally, any light-emitting unit group 10 at least includes a first color sub-light-emitting element 11, a second color sub-light-emitting element 12, and a third color sub-light-emitting element 13;
the area of the sub-transmissive portion 50 corresponding to the first color sub-illuminant 11 projected onto the light-emitting surface of the display panel 100 is S1, the area of the sub-transmissive portion 50 corresponding to the second color sub-illuminant 12 projected onto the light-emitting surface of the display panel 100 is S2, and the area of the sub-transmissive portion 50 corresponding to the third color sub-illuminant 13 projected onto the light-emitting surface of the display panel 100 is S3;
wherein S1 > S2, and S1 > S3.
Specifically, the present application provides an alternative arrangement that each of the light-emitting unit groups 10 includes three sub-light-emitting elements 11/12/13, and the three sub-light-emitting elements 11/12/13 have different light-emitting colors, namely, a first color sub-light-emitting element 11, a second color sub-light-emitting element 12, and a third color sub-light-emitting element 13, wherein the first color sub-light-emitting element 11 emits red light, the second color sub-light-emitting element 12 emits green light, and the third color sub-light-emitting element 13 emits blue light.
In the prior art, the luminous efficiency of the red sub-pixel is lower than that of the green sub-pixel/the blue sub-pixel, which may cause the brightness of the light emitted from the display panel to be inconsistent under the conditions of the same voltage and current and the same area of the sub-light emitting element, specifically, the display brightness of the red sub-pixel is lower than that of the green sub-pixel/the blue sub-pixel; in order to solve the problem, the present application further provides an alternative embodiment, where the area of the front projection of the sub-transmissive portion 50 corresponding to the first color sub-luminescent member 11 on the light-emitting surface of the display panel 100 is S1, the area of the front projection of the sub-transmissive portion 50 corresponding to the second color sub-luminescent member 12 on the light-emitting surface of the display panel 100 is S2, and the area of the front projection of the sub-transmissive portion 50 corresponding to the third color sub-luminescent member 13 on the light-emitting surface of the display panel 100 is S3; wherein S1 > S2, and S1 > S3.
The area of the sub light-transmitting portion 50 corresponding to the first color sub luminous element 11 emitting red light is set to be the largest, that is, the light emitting area of the first color sub luminous element 11 is correspondingly increased, so that the quantity of light emitted by the first color sub luminous element 11 is increased, and the display brightness of the first color sub luminous element 11 is improved. That is, by increasing the display luminance of the first color sub-illuminant 11 emitting red light, the display luminance uniformity of the first color sub-illuminant 11, the second color sub-illuminant 12 and the third color sub-illuminant 13 can be improved, and the display effect of the display panel 100 can be improved.
Referring to fig. 3, 4, 8-10, optionally, the micro lens 20 is only located on the light emitting surface side of the first color sub-luminescent part 11 facing the display panel 100.
Specifically, in the prior art, the difference between the light-emitting luminance of the red sub-pixel and the light-emitting light type and the display luminance of the green sub-pixel/blue sub-pixel is relatively large, and the light-emitting light type and the display luminance of the green sub-pixel/blue sub-pixel are approximately the same, so that the small difference of the display luminance is not easily recognized by the eyes of the user. Therefore, the present application provides an alternative embodiment that the micro-lens 20 is only disposed on the light emitting surface side of the first color sub-light emitting member 11 emitting red light toward the display panel 100, so as to achieve improvement of the light type of the emitted light of the display panel 100 and the overall uniformity of the display brightness.
Referring to fig. 3-5, fig. 11 and fig. 12, optionally, the orthographic projection of the sub-light-transmitting portion 50 corresponding to the first color sub-light-emitting member 11 on the light-emitting surface of the display panel 100 is circular (shown in fig. 11) or square (shown in fig. 12).
Specifically, since the microlens 20 is generally a spherical surface, the orthographic projection of the sub-light-transmitting portion 50 corresponding to the first color sub-light-emitting member 11 on the light-emitting surface of the display panel 100 can be selected to be circular or square, that is, the shape of the light-emitting surface of the first color sub-light-emitting member 11 passing through the light-shielding layer 05 is controlled to be circular or square, which is beneficial to making the light emitted to the microlens 20 more uniform and full, and is beneficial to ensuring the display effect of the display panel 100; in addition, when the light-shielding layer 05 is manufactured, the sub light-transmitting portions 50 having a regular shape, such as a circular shape or a rectangular shape (square shape), can be manufactured more easily, which is also advantageous in simplifying the difficulty in manufacturing the light-shielding layer 05 and improving the manufacturing efficiency of the display panel 100.
It should be noted that, in the present application, the microlens 20 with a spherical surface is generally selected, and the orthographic projection of the first color sub-light emitting element 11 on the light emitting surface of the display panel 100 is a circle; since the number of the microlenses 20 with spherical surfaces is the largest in the market, the manufacturing cost of the display panel 100 can be reduced by such selection, and the light rays emitted to the surfaces of the microlenses 20 can be ensured to be more uniform. However, the present application is not limited thereto, and the orthogonal projection shape of each sub-light-emitting element 11/12/13 on the light-emitting surface of the display panel 100 can be adjusted according to design requirements, such as a triangle, a hexagon, an irregular figure, and the like.
It should be noted that, the orthographic projection of the microlens 20 on the light-emitting surface of the display panel 100 and the orthographic projection of the corresponding sub-luminescent member 11/12/13 on the light-emitting surface of the display panel 100 can be set as similar patterns, and the orthographic projection of each sub-light-transmitting portion 50 on the light-emitting surface of the display panel 100 is also similar to the orthographic projection of the corresponding sub-light-emitting member 11/12/13 on the light-emitting surface of the display panel 100, so that enough light rays of the sub-light-emitting members can be emitted to the light-emitting surface side of the display panel 100 through the sub-light-transmitting portions 50, meanwhile, the corresponding micro-lenses 20 can be arranged in a smaller area, and the area occupancy rate of the emergent light to the surface of the micro-lenses 20 far away from the ion light-emitting member is higher, so that the material utilization rate of the display panel 100 is improved, and the effect of improving the uniformity of the display brightness of the display panel 100 is achieved. This description is merely an example of one embodiment that may be provided for purposes of illustration and is not intended to limit the scope of the present disclosure.
Optionally, the microlenses 20 include hemispherical microlenses, fresnel lenses.
Specifically, the microlens 20 provided by the present application includes a hemispherical microlens and a fresnel lens, which are used to adjust the angle of the light emitted from the sub-light-emitting member 11/12/13, so that the display brightness of the sub-light-emitting member 11/12/13 emitted to the light-emitting surface of the display panel 100 is increased. However, the present application is not limited to the type of the microlens 20, as long as the microlens 20 can adjust the brightness uniformity of the display screen. The material for manufacturing the microlens 20 may be selected from some high molecular organic materials, and it is necessary to ensure that the microlens 20 has a good light transmittance effect.
Referring to fig. 3 and 4, optionally, the orthographic projection diameter of the microlens 20 on the light-emitting surface of the display panel 100 is D2, the orthographic projection diameter of the sub-light-emitting element 11/12/13 on the light-emitting surface of the display panel 100 is D3, and D2 > D3.
Specifically, the present application further provides that the arrangement relationship between the microlens 20 and the sub-light-emitting member 11/12/13 corresponding thereto is that the orthographic projection of the microlens 20 on the light-emitting surface of the display panel 100 is greater than the orthographic projection of the sub-light-emitting member 11/12/13 on the light-emitting surface of the display panel 100, so that it can be ensured that the light emitted from the sub-light-emitting member 11/12/13 is emitted to the outer side of the light-emitting surface of the display panel 100 after being incident into the corresponding microlens 20, and it is ensured that as much as possible, even all the light can pass through the microlens 20 to adjust the emitting direction thereof.
For example, when the microlens 20 is a hemispherical microlens, and the orthographic projection of the corresponding sub-light-emitting element 11/12/13 on the light-emitting surface of the display panel 100 is circular, the orthographic projection diameter of the microlens 20 on the light-emitting surface of the display panel 100 is D2, and the orthographic projection diameter of the sub-light-emitting element 11/12/13 on the light-emitting surface of the display panel 100 is D3, where D2 is greater than D3, so as to ensure that the orthographic projection of the microlens 20 on the light-emitting surface of the display panel 100 is greater than the orthographic projection of the sub-light-emitting element 11/12/13 on the light-emitting surface of the display panel 100.
When the sub light emitting element 11/12/13 is circular, the diameter thereof may be selected from about 5 μm to 100 μm, and specifically, the sub light emitting element 11/12/13 may be Micro LEDs (Micro LEDs), mini LEDs (sub-millimeter LEDs), or other Micro LEDs.
With reference to fig. 3 and fig. 4, the height of the microlens 20 in the direction perpendicular to the light emitting surface of the display panel 100 is H, 1/20 ≦ H/D2 ≦ 1/2.
Specifically, for example, when the microlens 20 is a hemispherical microlens, assuming that the height of the hemispherical microlens in the direction perpendicular to the light-emitting surface of the display panel 100 is H, and the front projection diameter of the hemispherical microlens on the light-emitting surface of the display panel 100 is D2, the present application provides a manner of disposing the microlens 20 such that 1/20 ≦ H/D2 ≦ 1/2, i.e., a range of the height-to-diameter ratio of the hemispherical microlens is provided. Wherein, when H/D2 is 1/2, the microlens 20 is a regular hemisphere, and when H/D2 is 1/20, the diameter of the microlens 20 is very large and the height is very low; it should be noted that, it is required to ensure that the microlens 20 has a certain height H, so that the arc surface of the microlens 20 can have a certain radian, thereby achieving the effect that the microlens 20 has a good light exit angle change effect when the light entering from the bottom surface is emitted from the arc surface, therefore, the application proposes to set H/D2 not less than 1/20, avoid the radian of the arc surface of the microlens 20 being too small, and avoid the adjustment of the microlens 20 on the light exit angle being unable to achieve the required effect. The H/D2 value of the microlens 20 is not limited in this application, and may be 1/6, 2/11, 5/18, etc., which the user may change according to the adjustment requirement for the light exit angle.
Fig. 13 is a schematic diagram of a display device according to an embodiment of the present application, please refer to fig. 13 in combination with fig. 3 to 12, and based on the same inventive concept, the present application further provides a display device 200, where the display device 200 includes a display panel 100, and the display panel 100 is any one of the display panels 100 provided in the present application.
It should be noted that, for the embodiments of the display device 200 provided in the embodiments of the present application, reference may be made to the embodiments of the display panel 100, and repeated descriptions are omitted. The display device 200 provided by the present application may be: any product and component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a navigator and the like.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following advantages:
the application provides a display panel and a display device, wherein a micro lens is arranged in the light emitting direction of at least part of sub-light emitting pieces, and the emergent light angle of the emergent light is adjusted through the refraction effect of the micro lens on the emergent light of the sub-light emitting pieces; meanwhile, the refractive index relation between the planarization layer and the micro lens and the refractive index relation between the protective layer and the planarization layer in the panel are adjusted, so that the light emergent angle of the emergent light is further adjusted when the light emitted by the sub-luminous element passes through the interface between the protective layer and the planarization layer and the interface between the micro lens and the planarization layer, the emergent angle of the emergent light is converged towards the direction vertical to the light emergent surface of the display panel when the emergent light is emitted from the planarization layer to the outside, and the front-view display brightness of the sub-luminous element is further improved; namely, the adjustment of the display brightness of each sub-luminous piece and the luminous light type of the emergent light is realized, so that the problem of poor uniformity of the display brightness of the display panel is weakened or even eliminated, and the display effect of the display panel is improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (15)
1. A display panel, comprising:
the light-emitting element layer comprises at least one light-emitting unit group, and any light-emitting unit group comprises a plurality of sub-light-emitting elements;
a microlens structure layer located on a light emitting surface side of the light emitting element layer facing the display panel; comprises at least one micro lens corresponding to the sub-luminous element;
the planarization layer is positioned on one side of the micro-lens structure layer, which is far away from the light-emitting element layer, and at least covers the micro-lens; the refractive index of the planarization layer is smaller than that of the micro lens;
a protective layer at least between the microlens structure layer and the light emitting element layer; the protective layer has a refractive index less than a refractive index of the planarization layer.
2. The display panel according to claim 1, wherein any one of the light-emitting unit groups includes at least a first color sub-light-emitting element, a second color sub-light-emitting element, and a third color sub-light-emitting element;
the micro lens at least comprises a first micro lens and a second micro lens, and the first micro lens is arranged corresponding to the first color sub luminous piece; the second micro lens is arranged corresponding to the second color sub-luminous piece and/or the third color sub-luminous piece;
the radius of curvature of the first microlenses is smaller than the radius of curvature of the second microlenses.
3. The display panel according to claim 1, wherein any one of the light-emitting unit groups includes at least a first color sub-light-emitting element, a second color sub-light-emitting element, and a third color sub-light-emitting element;
the micro lens at least comprises a first micro lens and a second micro lens, and the first micro lens is arranged corresponding to the first color sub luminous piece; the second micro lens is arranged corresponding to the second color sub-luminous piece and/or the third color sub-luminous piece;
the refractive index of the first micro lens is larger than that of the second micro lens.
4. The display panel according to claim 1, further comprising a light-shielding layer on the protective layer; the light shielding layer comprises sub light-transmitting parts which correspond to the sub light-emitting parts one by one;
the orthographic projection of the sub light-transmitting part on the light-emitting surface of the display panel is positioned in the orthographic projection of the sub light-emitting part on the light-emitting surface of the display panel.
5. The display panel according to claim 4, wherein the light shielding layer has a thickness less than or equal to a thickness of the protective layer in a direction perpendicular to the light exit surface of the display panel.
6. The display panel of claim 5, wherein the display panel further comprises a reflector, the reflector is located on a side of at least a portion of the sub-light-emitting member close to the light-shielding layer, and an orthogonal projection of the reflector on the light-emitting surface of the display panel does not overlap an orthogonal projection of the sub-light-transmitting portion on the light-emitting surface of the display panel.
7. The display panel according to claim 5, further comprising a reflective member;
the light shielding layer comprises a side face, and the side face is intersected with the light emitting face of the display panel;
the reflecting member is located at least partially on the side surface.
8. The display panel according to claim 5, wherein the light-shielding layer has a thickness D1, 10nm D1 μm.
9. The display panel according to claim 4, wherein any one of the light emitting unit groups includes at least a first color sub-light emitting element, a second color sub-light emitting element, and a third color sub-light emitting element;
the orthographic projection area of the sub light-transmitting part corresponding to the first color sub light-emitting member on the light-emitting surface of the display panel is S1, the orthographic projection area of the sub light-transmitting part corresponding to the second color sub light-emitting member on the light-emitting surface of the display panel is S2, and the orthographic projection area of the sub light-transmitting part corresponding to the third color sub light-emitting member on the light-emitting surface of the display panel is S3;
wherein S1 > S2, and S1 > S3.
10. The display panel according to claim 9, wherein the micro lens is only located on a light emitting surface side of the first color sub-illuminant facing the display panel.
11. The display panel of claim 9, wherein the sub-light-transmitting portion corresponding to the first color sub-light-emitting member has a circular or square shape in an orthogonal projection on the light-emitting surface of the display panel.
12. The display panel according to claim 1, wherein the microlenses comprise hemispherical microlenses and fresnel lenses.
13. The display panel as claimed in claim 12, wherein the front projection diameter of the micro-lenses on the light-emitting surface of the display panel is D2, the front projection diameter of the sub-emitters on the light-emitting surface of the display panel is D3, and D2 > D3.
14. The display panel of claim 13, wherein the height of the micro-lenses in the direction perpendicular to the light exit surface of the display panel is H, 1/20 ≦ H/D2 ≦ 1/2.
15. A display device characterized by comprising the display panel according to any one of claims 1 to 14.
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Application publication date: 20210723 |