CN114512505A - Display backboard and display device - Google Patents

Display backboard and display device Download PDF

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Publication number
CN114512505A
CN114512505A CN202210172815.2A CN202210172815A CN114512505A CN 114512505 A CN114512505 A CN 114512505A CN 202210172815 A CN202210172815 A CN 202210172815A CN 114512505 A CN114512505 A CN 114512505A
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China
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refractive index
light
display
convex lens
lens structure
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CN202210172815.2A
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林加翔
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Guangzhou China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Guangzhou China Star Optoelectronics Semiconductor Display Technology Co Ltd
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Priority to CN202210172815.2A priority Critical patent/CN114512505A/en
Publication of CN114512505A publication Critical patent/CN114512505A/en
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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 having potential barriers, 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 having potential barriers, 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 having potential barriers, specially adapted for light emission in a repetitive configuration, e.g. LED bars two-dimensional arrays
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The embodiment of the invention discloses a display back plate and a display device; the display back plate comprises a driving circuit layer, a plurality of light-emitting units arranged at intervals on the driving circuit layer, a convex lens structure positioned between two adjacent light-emitting units, and an optical film positioned on the convex lens structure and the light-emitting units, wherein the refractive index of the convex lens structure is smaller than that of a film layer on one side, closest to the convex lens structure, of the optical film; according to the embodiment of the invention, the convex lens structure is arranged between the two adjacent light-emitting units, and the light rays between the two adjacent light-emitting units are converged and emitted by utilizing the fact that the refractive index of the convex lens structure is smaller than the refractive index of the film layer on the side, closest to the convex lens structure, of the optical film, so that the problem that the brightness of the gap part between the two adjacent light-emitting units is dark is solved, the technical problem that the display back plate presents the alternate distribution of the bright area and the dark area is solved, and the light-emitting display effect of the display back plate is improved.

Description

Display backboard and display device
Technical Field
The invention relates to the field of display, in particular to a display back plate and a display device.
Background
In recent years, the light emitting display effect of the display back plate is more and more emphasized by consumers, a gap exists between two adjacent light emitting units of the display back plate, and the light emitting angle of each light emitting unit is limited, so that the brightness of the gap part of the two adjacent light emitting units is dark, the brightness of the light emitting units is a bright area, the gap part of the two adjacent light emitting units is a dark area, and the whole display back plate has the phenomenon that the bright area and the dark area are alternately distributed.
Therefore, a display back plate and a display device are needed to solve the above technical problems.
Disclosure of Invention
The embodiment of the invention provides a display back plate and a display device, which can solve the technical problem that the existing display back plate presents alternate distribution of bright areas and dark areas.
An embodiment of the present invention provides a display backplane, including:
a drive line layer;
a plurality of light emitting units arranged at intervals and positioned on the driving circuit layer;
the convex lens structures are positioned on the driving circuit layer, and one convex lens structure is positioned between two adjacent light-emitting units;
an optical film positioned over the convex lens structure and the light emitting unit;
the refractive index of the convex lens structure is smaller than that of the film layer on one side, closest to the convex lens structure, of the optical film.
Preferably, the convex lens structure and the light emitting unit are arranged in the same layer; the optical film at least comprises two film layers positioned above the convex lens structure and the light-emitting unit; wherein, in the direction from the light-emitting unit to the side far away from the driving circuit layer, the refractive index of the film layer of the optical film is gradually reduced.
Preferably, in the optical film, a difference between a refractive index of a film layer closest to the convex lens structure and a refractive index of a film layer farthest from the convex lens structure is smaller than a difference between a refractive index of a film layer closest to the convex lens structure and a refractive index of the convex lens structure.
Preferably, the optical film further comprises a plurality of scattering particles located within any of the film layers of the optical film.
Preferably, any of the film layers of the optical film further comprises a substrate; wherein the scattering particles have a refractive index different from a refractive index corresponding to the matrix.
Preferably, the refractive index of the scattering particles is greater than the refractive index of the corresponding matrix.
Preferably, at least one of the scattering particles comprises a plurality of recesses in a surface of the scattering particle.
Preferably, at least one of the scattering particles includes a particle body and at least one through hole, the through hole penetrates through the particle body, and the matrix of all corresponding films is filled in the through hole.
Preferably, the display back plate further comprises a reflective sheet located between the convex lens structure and the driving circuit layer.
The embodiment of the invention also provides a display device, which comprises the display back plate and a device main body, wherein the display back plate and the device main body are combined into a whole.
The invention has the beneficial effects that: according to the embodiment of the invention, the convex lens structure is arranged between the two adjacent light-emitting units, and the light rays between the two adjacent light-emitting units are converged and emitted by utilizing the fact that the refractive index of the convex lens structure is smaller than the refractive index of the film layer on the side, closest to the convex lens structure, of the optical film, so that the problem that the brightness of the gap part between the two adjacent light-emitting units is dark is solved, the technical problem that the display back plate presents the alternate distribution of the bright area and the dark area is solved, and the light-emitting display effect of the display back plate is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a first structure of a display backplane according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second structure of a display backplane according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a third structure of a display backplane according to an embodiment of the present invention;
FIG. 4 is an enlarged schematic view of a first structure of scattering particles of a display backplane according to an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of a second structure of scattering particles of a display backplane according to an embodiment of the present invention;
FIG. 6 is an enlarged schematic view of a third structure of scattering particles of a display back plate according to an embodiment of the present invention;
fig. 7 is an enlarged schematic view of a fourth structure of scattering particles of a display back plate according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a fourth structure of a display backplane according to an embodiment of the present invention;
FIG. 9 is a schematic diagram illustrating an effect of a display backplane according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a first structure of a display device according to an embodiment of the present invention;
fig. 11 is a schematic structural diagram of a second structure of a display device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, and are not intended to limit the present invention. In the present invention, unless otherwise specified, the use of directional terms such as "upper" and "lower" generally means upper and lower in the actual use or operation of the device, particularly in the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
In recent years, the light emitting display effect of the display back plate is more and more emphasized by consumers, a gap exists between two adjacent light emitting units of the display back plate, and the light emitting angle of each light emitting unit is limited, so that the brightness of the gap part of the two adjacent light emitting units is dark, the brightness of the light emitting units is a bright area, the gap part of the two adjacent light emitting units is a dark area, and the whole display back plate has the phenomenon that the bright area and the dark area are alternately distributed.
Referring to fig. 1 to 9, an embodiment of the invention provides a display backplane 100, including:
a driving line layer 200;
a plurality of light emitting units 300 disposed at intervals on the driving line layer 200;
a plurality of convex lens structures 400 on the driving circuit layer 200, wherein one convex lens structure 400 is located between two adjacent light emitting units 300;
an optical film 500 positioned over the convex lens structure 400 and the light emitting unit 300;
the refractive index of the convex lens structure 400 is smaller than the refractive index of the film layer on the side of the optical film 500 closest to the convex lens structure 400.
According to the embodiment of the invention, the convex lens structure is arranged between the two adjacent light-emitting units, and the light rays between the two adjacent light-emitting units are converged and emitted by utilizing the fact that the refractive index of the convex lens structure is smaller than the refractive index of the film layer on the side, closest to the convex lens structure, of the optical film, so that the problem that the brightness of the gap part between the two adjacent light-emitting units is dark is solved, the technical problem that the display back plate presents the alternate distribution of the bright area and the dark area is solved, and the light-emitting display effect of the display back plate is improved.
The technical solution of the present invention will now be described with reference to specific embodiments.
In this embodiment, referring to fig. 1 and fig. 2, the display back plate 100 includes a driving circuit layer 200, a plurality of light emitting units 300 disposed at intervals on the driving circuit layer 200, a convex lens structure 400 disposed between two adjacent light emitting units 300, and an optical film 500 disposed on the convex lens structure 400 and the light emitting units 300, wherein a refractive index of the convex lens structure 400 is smaller than a refractive index of a film layer on a side of the optical film 500 closest to the convex lens structure 400.
In fig. 1, 2, 3, and 8, broken-line arrows indicate ray paths.
Referring to fig. 9 (a), if the solution of the present embodiment is not adopted, there is a dark region between two adjacent light emitting units 300.
Referring to fig. 9 (b), one of the lenticular structures 400 is located between two adjacent light-emitting units 300, and by using that the refractive index of the lenticular structure 400 is smaller than that of the film layer of the optical film 500 closest to the lenticular structure 400, when light passes through the lenticular structure 400 and is emitted to the optical film 500, light is refracted from a low refractive index to a high refractive index film layer, and refraction where light is converged occurs at an interface between the convex lens and the optical film 500, so that more light rays between two adjacent light emitting units 300 are converged and emitted, the brightness between two adjacent light emitting units 300 is increased, therefore, the problem of dark brightness of the gap between two adjacent light-emitting units 300 is reduced, the technical problem that the display back plate 100 presents the alternate distribution of the bright area and the dark area is solved, and the light-emitting display effect of the display back plate 100 is improved.
In some embodiments, referring to fig. 2, the convex lens structure 400 is disposed on the same layer as the light emitting unit 300; the optical film 500 includes at least two film layers over the convex lens structure 400 and the light emitting unit 300; in a direction from the light emitting unit 300 to a side far away from the driving circuit layer 200, the refractive index of the film layer of the optical film 500 gradually decreases.
Referring to fig. 2, taking the example that the optical film 500 includes two layers, the optical film 500 at least includes a first layer 510 located above the convex lens structure 400 and the light emitting unit 300, and a second layer 520 located above the first layer 510; wherein the refractive index of the first layer 510 is greater than the refractive index of the second layer 520.
The light emitting units 300 emit light directly emitted to the side far away from the driving circuit layer 200, and when the light passes through the first layer 510 and the second layer 520, because the refractive index of the first layer 510 is greater than that of the second layer 520, the light can be refracted in a light divergence manner on the first layer 510 and the second layer 520, so that the divergence angle of the light directly emitted by the light emitting units 300 is increased, the light uniformity of the display back plate 100 is increased, the problem of dark brightness of a gap portion between two adjacent light emitting units 300 is solved, the technical problem that the display back plate 100 presents an alternate distribution of a bright area and a dark area is solved, and the light emitting display effect of the display back plate 100 is improved.
In some embodiments, referring to fig. 8, the optical film 500 may include a plurality of film layers, for example, the optical film 500 further includes a third layer 530 located on a side of the second layer 520 away from the first layer 510, a refractive index of the third layer 530 is smaller than a refractive index of the second layer 520, so as to increase a divergence angle of light, increase uniformity of light of the display back plate 100, and improve a problem of a dark luminance at a gap portion between two adjacent light emitting units 300, and the number of the film layers of the optical film 500 may be adjusted according to actual situations, and is not limited to a specific number.
In some embodiments, in the optical film 500, a difference between the refractive index of the film layer with the highest refractive index and the refractive index of the film layer with the lowest refractive index is smaller than a difference between the refractive index of the film layer with the highest refractive index and the refractive index of the convex lens structure 400. That is, in the optical film 500, the difference between the refractive index of the film layer closest to the convex lens structure 400 and the refractive index of the film layer farthest from the convex lens structure 400 is smaller than the difference between the refractive index of the film layer closest to the convex lens structure 400 and the refractive index of the convex lens structure 400.
The light rays pass through the converging and refracting effect of the convex lens and are larger than the diverging and refracting effect of the light rays passing through the optical film 500, so that more light rays between two adjacent light-emitting units 300 are converged and emitted, the brightness between two adjacent light-emitting units 300 is increased, the problem that the brightness of a gap part between two adjacent light-emitting units 300 is dark is solved, the technical problem that the display back plate 100 presents a bright area and a dark area which are alternately distributed is solved, and the luminous display effect of the display back plate 100 is improved.
In some embodiments, referring to fig. 3, the optical film 500 further includes a plurality of scattering particles 600 located in any of the film layers of the optical film 500.
The scattering particles 600 are added into the optical film 500, so that the light divergence degree is improved, the light uniformity of the display back plate 100 is increased, the problem that the brightness of a gap part between two adjacent light-emitting units 300 is dark is solved, the technical problem that the display back plate 100 presents a bright area and a dark area which are alternately distributed is solved, and the light-emitting display effect of the display back plate 100 is improved.
In some embodiments, any of the film layers of the optical film 500 further comprises a matrix; wherein the scattering particles 600 have a refractive index different from a refractive index corresponding to the matrix. The refractive indexes of the scattering particles 600 and the matrix are different, and light rays are also refracted when passing through the surface between the matrix and the scattering particles 600, so that the divergence degree of the light rays is improved, the uniformity of the light rays of the display back plate 100 is increased, meanwhile, the refractive index of the optical film 500 can be adjusted by utilizing the scattering particles 600, so that different application scenes are adapted, the problem that the brightness of a gap part between two adjacent light-emitting units 300 is dark is solved, the technical problem that the display back plate 100 presents the alternate distribution of a bright area and a dark area is solved, and the light-emitting display effect of the display back plate 100 is improved.
In some embodiments, the refractive index of the scattering particles 600 is greater than the refractive index corresponding to the matrix. The material of the matrix may be an organic encapsulating material, such as organosilica, however, the refractive index of the organic encapsulating material is generally small, and it is difficult to achieve a refractive index gradient, and the material of the scattering particles 600 may be inorganic particles, such as TiO2、ZnS、ZrO2And the like, thereby increasing the refractive index of the optical film 500, more easily realizing the refractive index gradient of the optical film 500, facilitating the increase of the divergence degree of light, increasing the light uniformity of the display back plate 100, improving the problem of the partial dark brightness of the gap between two adjacent light emitting units 300, improving the technical problem that the display back plate 100 presents the alternate distribution of the bright area and the dark area, and improving the light emitting display effect of the display back plate 100.
In some embodiments, referring to fig. 4, at least one of the scattering particles 600 is a solid particle.
The scattering particles 600 are solid particles, so that the refractive index of the scattering particles 600 is different from that of the corresponding film layer, the complexity of the optical structure of the optical film 500 is increased, the scattering effect of the display light when the display light irradiates the scattering particles 600 is enhanced by using the refractive index difference, the light uniformity of the display back plate 100 is increased, the problem that the brightness of the gap between two adjacent light-emitting units 300 is dark is solved, the technical problem that the display back plate 100 presents the alternate distribution of the bright area and the dark area is solved, and the light-emitting display effect of the display back plate 100 is improved.
In some embodiments, referring to fig. 5, at least one of the scattering particles 600 includes a plurality of recesses 610 on the surface of the scattering particle 600.
The recess 610 can increase the divergence degree of the light when the scattering particles 600 are irradiated, improve the light scattering effect, increase the light uniformity of the display back plate 100, improve the problem of the partial dark brightness of the gap between two adjacent light emitting units 300, improve the technical problem that the display back plate 100 presents the alternate distribution of the bright area and the dark area, and improve the light emitting display effect of the display back plate 100.
In some embodiments, referring to fig. 6, at least one of the scattering particles 600 includes a particle body 601 and at least one through hole 620, the through hole 620 penetrates through the particle body 601, and the through hole 620 is filled with the matrix of all corresponding layers.
The particle body 601 penetrates through the through hole 620, when the particle body is in contact with a film layer of the optical film 500, the substrate of the optical film 500 is filled in the through hole 620, and the refractive indexes of the through hole 620 and the particle body 601 are different from the refractive index of the corresponding film layer, so that the scattering effect of display light when the display light irradiates the scattering particles 600 is enhanced, the light uniformity of the display back plate 100 is increased, the problem that the brightness of a gap part between two adjacent light-emitting units 300 is dark is solved, the technical problem that the display back plate 100 presents alternate distribution of a bright area and a dark area is solved, and the light-emitting display effect of the display back plate 100 is improved.
In some embodiments, referring to fig. 7, at least one of the scattering particles 600 includes a particle body 601 and a cavity 630 disposed in the particle body 601, wherein a refractive index of a medium in the cavity 630 is different from a refractive index of the particle body 601.
The particle main body 601 wraps the cavity 630, and is a hollow structure when no filler is present, the particle main body 601 is filled with media with different refractive indexes of the particle main body 601, the complexity of the optical structure of the optical film 500 layer is increased, the scattering effect of the display light when the display light irradiates the scattering particles 600 is enhanced by using the refractive index difference, the light uniformity of the display back plate 100 is increased, the problem that the brightness of a gap part between two adjacent light-emitting units 300 is dark is solved, the technical problem that the display back plate 100 presents a bright area and a dark area which are alternately distributed is solved, and the light-emitting display effect of the display back plate 100 is improved.
In some embodiments, the scattering particles 600 including the cavities 630 are filled with a first gas or a first liquid, the refractive index of the first gas is different from that of the particle body 601, and the refractive index of the first liquid is different from that of the particle body 601.
By utilizing the refractive index difference, the scattering effect of the display light when the display light is emitted to the scattering particles 600 is enhanced, the light uniformity of the display back plate 100 is increased, the problem that the brightness of the gap part between two adjacent light-emitting units 300 is dark is solved, the technical problem that the display back plate 100 presents the alternate distribution of the bright area and the dark area is solved, and the light-emitting display effect of the display back plate 100 is improved.
In some embodiments, the refractive index of the general gas is smaller than that of the solid-liquid, the refractive index of the first gas is smaller than that of the particle body 601, when the light beam is emitted from the particle body 601 to the cavity 630, the light beam is emitted from the side with the larger refractive index to the side with the smaller refractive index, when the incident angle is larger than the critical angle, the light beam is totally reflected at the interface between the particle body 601 and the cavity 630, and the light utilization rate is improved, the light loss is reduced, the technical problem that the display back plate 100 presents an alternate distribution of bright regions and dark regions is improved, and the luminous display effect of the display back plate 100 is improved while the scattering effect of the display light beam when the display light beam is emitted to the scattering particles 600 is enhanced.
In some embodiments, in the optical film 500, the difference between the refractive index of the film layer with the highest refractive index and the refractive index of the film layer with the lowest refractive index is less than 0.48. In the experiment, the range of the extreme value difference of the refractive index can ensure the light divergence, and is not easy to cause the excessive total reflection of the light in the optical film 500, thereby improving the technical problem that the display back plate 100 presents the alternate distribution of the bright area and the dark area, and improving the luminous display effect of the display back plate 100.
In some embodiments, referring to fig. 8, the display backplane 100 further includes a reflective sheet 700 disposed between the convex lens structure 400 and the driving circuit layer 200.
The utilization rate of the light emitted by the light emitting units 300 to the driving circuit layer 200 is increased, so that more light between two adjacent light emitting units 300 is converged and emitted, the brightness between two adjacent light emitting units 300 is increased, the problem of dark brightness of the gap between two adjacent light emitting units 300 is reduced, the technical problem that the display back plate 100 presents the alternate distribution of the bright area and the dark area is improved, and the light emitting display effect of the display back plate 100 is improved.
In some embodiments, the light emitting unit 300 may be a Mini LED or a Micro LED, which is not particularly limited herein.
In some embodiments, the convex lens structure 400 may be a transparent material, such as silicone rubber, transparent optical cement, etc., which are only examples and are not limited in particular.
In some embodiments, the refractive index of the convex lens structure 400 gradually increases in a direction from the edge of the display backplane 100 to the center of the display backplane 100. The brightness of the display light in the dark area in the center of the display back plate 100 is improved, and the human vision is generally concentrated in the center area of the display back plate 100, so that the display light in the center area is improved, and the display effect is improved to the maximum extent.
In some embodiments, the number of the recesses 610 gradually increases in a direction from the center of the display backplane 100 to the edge of the display backplane 100.
In the edge of the display back plate 100, since there is no light emitting unit 300 on the periphery, the problem of dark area becomes more serious, the number of the recesses 610 in the edge direction is increased, which is beneficial to increase the divergence degree of light when the light is irradiated on the scattering particles 600, improve the light scattering effect, increase the light uniformity of the display back plate 100, improve the problem of dark brightness of the gap portion between two adjacent light emitting units 300, improve the technical problem that the display back plate 100 presents alternate distribution of bright area and dark area, and improve the light emitting display effect of the display back plate 100.
According to the embodiment of the invention, the convex lens structure is arranged between the two adjacent light-emitting units, and the light rays between the two adjacent light-emitting units are converged and emitted by utilizing the fact that the refractive index of the convex lens structure is smaller than the refractive index of the film layer on the side, closest to the convex lens structure, of the optical film, so that the problem that the brightness of the gap part between the two adjacent light-emitting units is dark is solved, the technical problem that the display back plate presents the alternate distribution of the bright area and the dark area is solved, and the light-emitting display effect of the display back plate is improved.
Referring to fig. 10, an embodiment of the present invention further provides a display device 10, including any one of the display back plate 100 and the device body 20, where the display back plate 100 and the device body 20 are combined into a whole.
For a specific structure of the display back panel 100, please refer to any one of the above embodiments of the display back panel 100 and the accompanying drawings, which are not described herein again.
The technical solution of the present invention will now be described with reference to specific embodiments.
In some embodiments, referring to fig. 11, the device body 20 may include a back frame 30 located on a side of the driving circuit layer 200 away from the light emitting unit 300, the back frame 30 is formed with an inner cavity, and the display back plate 100 is located in the inner cavity.
In some embodiments, referring to fig. 11, the device body 20 may further include a light function layer 50 located on a side of the optical film 500 away from the light emitting unit 300, and a functional body 40 located on the light function layer 50, where the functional body 40 includes an array substrate 41, a liquid crystal layer 42, a color film layer 43, an upper polarization layer 44, and a lower polarization layer 45.
In some embodiments, referring to fig. 11, the optical function layer 50 includes a quantum dot film 51 on a side of the optical film 500 away from the light emitting unit 300, a first diffusion layer 52 on the quantum dot film 51, a first light-adding layer 53 on the first diffusion layer 52, a second light-adding layer 54 on the first light-adding layer 53, and a second diffusion layer 55 on the second light-adding layer 54.
According to the embodiment of the invention, the convex lens structure is arranged between the two adjacent light-emitting units, and the light between the two adjacent light-emitting units is converged and emitted by utilizing the fact that the refractive index of the convex lens structure is smaller than that of the film layer on the side, closest to the convex lens structure, of the optical film, so that the problem that the brightness of a gap part between the two adjacent light-emitting units is dark is solved, the technical problem that a display back plate presents a bright area and a dark area which are alternately distributed is solved, and the light-emitting display effect of the display back plate is improved.
The embodiment of the invention discloses a display back plate and a display device; the display back plate comprises a driving circuit layer, a plurality of light-emitting units arranged at intervals on the driving circuit layer, a convex lens structure positioned between two adjacent light-emitting units, and an optical film positioned on the convex lens structure and the light-emitting units, wherein the refractive index of the convex lens structure is smaller than that of a film layer on one side, closest to the convex lens structure, of the optical film; according to the embodiment of the invention, the convex lens structure is arranged between the two adjacent light-emitting units, and the light rays between the two adjacent light-emitting units are converged and emitted by utilizing the fact that the refractive index of the convex lens structure is smaller than the refractive index of the film layer on the side, closest to the convex lens structure, of the optical film, so that the problem that the brightness of the gap part between the two adjacent light-emitting units is dark is solved, the technical problem that the display back plate presents the alternate distribution of the bright area and the dark area is solved, and the light-emitting display effect of the display back plate is improved.
The display back plate and the display device provided by the embodiment of the invention are described in detail above, and the principle and the embodiment of the invention are explained in the present document by applying a specific example, and the description of the above embodiment is only used to help understanding the method and the core idea of the invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A display backplane, comprising:
a drive line layer;
a plurality of light emitting units arranged at intervals and positioned on the driving circuit layer;
the convex lens structures are positioned on the driving circuit layer, and one convex lens structure is positioned between two adjacent light-emitting units;
an optical film positioned over the convex lens structure and the light emitting unit;
the refractive index of the convex lens structure is smaller than that of the film layer on one side, closest to the convex lens structure, of the optical film.
2. The display backplane of claim 1, wherein the convex lens structure is disposed in a same layer as the light emitting unit;
the optical film at least comprises two film layers positioned above the convex lens structure and the light-emitting unit;
wherein, in the direction from the light-emitting unit to the side far away from the driving circuit layer, the refractive index of the film layer of the optical film is gradually reduced.
3. A display backplane according to claim 2, wherein the difference between the refractive index of the film layer closest to the side of the lenticular structures and the refractive index of the film layer furthest from the lenticular structures in the optical film is smaller than the difference between the refractive index of the film layer closest to the side of the lenticular structures and the refractive index of the lenticular structures.
4. The display backplane of claim 2, wherein the optical film further comprises a plurality of scattering particles within any of the film layers of the optical film.
5. The display backplane of claim 4, wherein any of the film layers of the optical film further comprises a matrix;
wherein the scattering particles have a refractive index different from a refractive index corresponding to the matrix.
6. A display backplane according to claim 5, wherein the refractive index of the scattering particles is larger than the refractive index of the corresponding matrix.
7. The display backplane of claim 6, wherein at least one of the scattering particles comprises a plurality of recesses on a surface of the scattering particle.
8. The display backplane according to claim 6 or 7, wherein at least one of the scattering particles comprises a particle body and at least one through hole, the through hole penetrates through the particle body, and the through hole is filled with the matrix of all the corresponding layers.
9. The display backplane of claim 1, further comprising a light reflector between the lenticular lens structures and the driving line layer.
10. A display device comprising the display back plate according to any one of claims 1 to 9 and a device body, the display back plate and the device body being combined as one body.
CN202210172815.2A 2022-02-24 2022-02-24 Display backboard and display device Pending CN114512505A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115424538A (en) * 2022-09-09 2022-12-02 惠科股份有限公司 Display device and method for manufacturing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115424538A (en) * 2022-09-09 2022-12-02 惠科股份有限公司 Display device and method for manufacturing the same
CN115424538B (en) * 2022-09-09 2024-04-09 惠科股份有限公司 Display device and method for manufacturing the same

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