CN116745918A - Display device and manufacturing method thereof - Google Patents
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- CN116745918A CN116745918A CN202280000016.5A CN202280000016A CN116745918A CN 116745918 A CN116745918 A CN 116745918A CN 202280000016 A CN202280000016 A CN 202280000016A CN 116745918 A CN116745918 A CN 116745918A
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Abstract
A display device and a method of manufacturing the same are disclosed. The display device comprises a light emitting and display unit and a narrow viewing angle structure unit; the light-emitting and display unit comprises a driving substrate and a plurality of micro LED micro light-emitting units positioned on the driving substrate, wherein each micro light-emitting unit is provided with a light-emitting surface; the narrow visual angle structure unit comprises a retaining wall and a shading structure, wherein the retaining wall is arranged corresponding to a gap between the micro light emitting units, and the shading structure is arranged on the retaining wall.
Description
The application relates to the technical field of micro light emitting diode (micro light emitting diode) display, in particular to a display device and a manufacturing method thereof.
At present, a Head Up Display (HUD) of vehicle-mounted Display mainly adopts a liquid crystal on silicon (Liquid Crystal On Silicon, LCOS) or digital light processing (Digital Light Processing, DLP) technology, but the response speed of a Display screen manufactured by the two technologies is slow, the brightness is not high enough, and the brightness of the Display screen is required to reach 10 tens of thousands of nits under ideal conditions, but the Display screen of the two technologies is difficult to realize at present.
The micro LED micro light-emitting unit can realize ns-level response speed and ultrahigh brightness by adopting an inorganic light-emitting diode technology, but the common micro LED micro light-emitting unit has a large light-emitting angle, the half-peak angle of the common micro LED micro light-emitting unit is generally 120-140 degrees, and the HUD display screen needs a smaller light-emitting angle. The light emitted by the HUD display screen can be transmitted to the front windshield of the vehicle, if the light emitting angle is larger, the light can be transmitted to the face of a driver after being reflected by the front windshield, and strong light stimulates eyes to cause eye fatigue and blurred vision, so that driving safety is influenced, and the light emitted by the HUD display screen is required to have a smaller light emitting angle. However, the light-emitting angle of the common micro LED micro light-emitting unit is large, so that the micro LED micro light-emitting unit cannot be directly used as a light source of the HUD display screen.
The embodiment of the application provides a display device and a manufacturing method thereof, which adopt micro LED micro light emitting units to solve the technical problems of low response speed and low brightness of a display screen of a head-up display of the current vehicle-mounted display and further solve the technical problem of narrow-view light emitting function when the micro LED micro light emitting units are adopted as light sources.
An embodiment of the present application provides a display device including: a light emitting and display unit and a narrow viewing angle structure unit; the light-emitting and display unit comprises a driving substrate and a plurality of micro LED micro light-emitting units positioned on the upper surface of the driving substrate, wherein each micro light-emitting unit is provided with a light-emitting surface parallel to the driving substrate; the narrow visual angle structure unit is arranged on the light emitting and display unit and comprises a retaining wall arranged corresponding to the gap between the micro light emitting units and a shading structure arranged on the retaining wall; the light shielding structure is provided with a plurality of light shielding surfaces which are positioned on the surface of the retaining wall and correspond to the micro light emitting units, each light shielding surface is provided with a light emitting end far away from the light emitting surface and a light entering end nearest to the periphery of the light emitting surface, and at least one inclined light shielding section surface which extends to a direction far away from the light emitting surface at an angle smaller than a right angle relative to the light emitting surface is provided, so that the projection of the light emitting end on a light entering end plane formed by the cross section of the light entering end is positioned in the light entering end plane.
Optionally, in some embodiments of the present application, the narrow viewing angle structural unit further includes a transparent substrate and a transparent adhesive layer; the transparent adhesive layer is arranged on the lower surface of the transparent substrate, the transparent adhesive layer is provided with a bottom layer close to the transparent substrate, and a retaining wall facing the light emitting and displaying unit, the retaining wall defines a plurality of grooves corresponding to the light emitting surfaces, and the light shielding surfaces are arranged on the side surfaces of the grooves.
Optionally, in some embodiments of the present application, an angle between the inclined light shielding section surface and the light emitting surface is between 30 ° and 70 °.
Optionally, in some embodiments of the present application, the inclined light-shielding section is in a circular arc shape, so that the light-shielding surface is in a circular truncated cone shape from the light-incident end to the light-emergent end; or the inclined shading section surface is a plane, and the shading surface is provided with at least three inclined shading section surfaces positioned on opposite surfaces, so that the shading surface is in a prismatic table shape from the light inlet end to the light outlet end.
Optionally, in some embodiments of the present application, the light emitting end of the light shielding surface has the same vertical height from the light emitting surface in each azimuth.
Optionally, in some embodiments of the present application, the display device further includes: the polarized light structure unit is arranged on one side of the narrow visual angle structure unit, which is away from the light emitting and displaying unit; the light incident bottom surface is parallel to the light emitting surface, and the included angle between the light incident bottom surface and the light emitting top surface is 5-40 degrees.
Optionally, in some embodiments of the present application, the display device further includes a second adhesive layer between the polarizing structure unit and the narrow viewing angle structure unit.
Optionally, in some embodiments of the present application, a coverage height of the light shielding surface on a side surface of the retaining wall ranges from 30um to 60um.
Optionally, in some embodiments of the present application, the narrow viewing angle structure unit further comprises a first adhesive layer; the first adhesive layer is arranged between the light shielding surfaces and the light emitting and displaying units and is used for sticking and fixing the light emitting and displaying units and the narrow-view-angle structural units.
Optionally, in some embodiments of the present application, the light emitting ends of the at least two inclined light shielding section surfaces located on opposite sides have different vertical heights from the light emitting surface.
Correspondingly, the embodiment of the application also provides a manufacturing method of the display device, which comprises the following steps: providing a light-emitting and display unit, wherein the light-emitting and display unit comprises a driving substrate and a plurality of micro LED micro light-emitting units positioned on the upper surface of the driving substrate, and each micro light-emitting unit is provided with a light-emitting surface parallel to the driving substrate; providing a narrow visual angle structural unit and attaching the narrow visual angle structural unit to the light-emitting and display unit, wherein the narrow visual angle structural unit comprises a retaining wall arranged corresponding to a gap between each micro light-emitting unit and a shading structure arranged on the retaining wall; the light shielding structure is provided with a plurality of light shielding surfaces which are positioned on the surface of the retaining wall and correspond to the micro light emitting units, each light shielding surface is provided with a light emitting end far away from the light emitting surface and a light entering end nearest to the periphery of the light emitting surface, and at least one inclined light shielding section surface which extends to a direction far away from the light emitting surface at an angle smaller than a right angle relative to the light emitting surface is provided, so that the projection of the light emitting end on a light entering end plane formed by the cross section of the light entering end is positioned in the light entering end plane.
Optionally, in some embodiments of the present application, the method for manufacturing a display device further includes: and one side of the narrow visual angle structural unit, which is far away from the light-emitting and display unit, is attached with a polarized light structural unit, the polarized light structural unit comprises a light-in bottom surface and a light-out top surface, the light-in bottom surface is arranged in parallel with the light-emitting surface, and the included angle between the light-in bottom surface and the light-out top surface is 5-40 degrees.
Optionally, in some embodiments of the present application, the step of providing a narrow view angle structure unit includes: providing a transparent substrate; coating a transparent glue layer on the transparent substrate; patterning the transparent adhesive layer to form a bottom layer close to the transparent substrate and a retaining wall far away from the transparent substrate, wherein the retaining wall defines a plurality of grooves corresponding to the luminous surfaces; and covering a layer of shading material on the retaining wall to form the shading structure.
Optionally, in some embodiments of the present application, the step of forming the light shielding structure includes: forming the shading material on the surface of the side, with the retaining wall, of the transparent substrate; etching the shading material to remove the shading material at the bottom of the groove, and forming the shading surface on each groove side surface.
Optionally, in some embodiments of the present application, the step of etching the light shielding material includes: and removing the shading material of the upper part of the side surface of the groove, which is close to the bottom of the groove, so that the vertical heights of the light emitting ends of the shading surface from the light emitting surface are different.
According to the embodiment of the application, the micro LED display device is adopted, and the plurality of micro LED micro light-emitting units are arranged on the upper surface of the light-emitting and display unit of the micro LED display device, so that the response speed of the display device when being used as a head-up display screen for vehicle-mounted display is improved, and the brightness is increased; the shading structure is provided with a plurality of shading surfaces which are positioned on the surface of the retaining wall and correspond to the micro light emitting units, and the shading surfaces are used for limiting the light emitting angles of the micro light emitting units, so that light emitting control with a narrow viewing angle can be realized.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 2 is a flowchart of a method for manufacturing a display device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 5 is a flowchart of a method for manufacturing a display device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present application.
Reference numerals illustrate:
the display device 100, the light emitting and display unit 10, the driving substrate 11, the micro light emitting unit 12, the light emitting surface 12a, the red micro light emitting diode R, the green micro light emitting diode G, the blue micro light emitting diode B, the flat layer 13, the narrow viewing angle structural unit 20, the first adhesive layer 21, the light shielding structure 22, the light shielding surface 221, the inclined light shielding segment surfaces 221a and 221B, the transparent adhesive layer 23, the retaining wall 231, the groove 232, the transparent substrate 24, the polarizing structural unit 30, and the second adhesive layer 31.
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description, and is not intended to limit the application. In the present application, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.
In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Also, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or meaning that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or meaning that the first feature is less level than the second feature.
The embodiment of the application provides a display device and a manufacturing method of the display device. The following will describe in detail. The following description of the embodiments is not intended to limit the preferred embodiments.
Example 1
As shown in fig. 1, a display device 100 including a light emitting and display unit 10 and a narrow viewing angle structure unit 20 is provided in embodiment 1 of the present application.
In the embodiment of the application, the light emitting and display unit 10 includes a driving substrate 11 and a plurality of micro led micro light emitting units 12 located on the upper surface of the driving substrate 11, wherein the micro light emitting units 12 are arranged in an array on the upper surface of the driving substrate 11, each micro light emitting unit 12 has a light emitting surface 12a parallel to the driving substrate 11, and the light emitting surface 12a is the upper surface of the micro light emitting unit 12. The micro light emitting unit 12 includes at least one of red micro light emitting diode R, green micro light emitting diode G, and blue micro light emitting diode B. It is understood that the micro light emitting unit 12 is used for picture display. The driving substrate 11 is provided with a control circuit layer for controlling the micro light emitting unit 12 to be turned on and off, and the driving substrate 11 may be an array substrate.
As shown in fig. 1, in order to ensure that the top surface of the driving substrate 11 is a flat plane, a flat layer 13 may be further disposed on the driving substrate 11, the flat layer 13 is filled between the micro light emitting units 12, and the upper surface of the flat layer 13 is flush with the top surface of the micro light emitting units 12.
As shown in fig. 1, in the embodiment of the present application, the narrow viewing angle structure unit 20 is disposed on the light emitting and display unit 10, and includes a retaining wall 231 disposed corresponding to the gap between the micro light emitting units 10 and a light shielding structure 22 disposed on the retaining wall 231; the light shielding structure 22 has a plurality of light shielding surfaces 221 located on the surface of the retaining wall 231 and corresponding to each of the micro light emitting units 12, where each light shielding surface 221 has a light emitting end far from the light emitting surface 12a and a light entering end nearest to the periphery of the light emitting surface 12a, and at least one inclined light shielding section surface 221a extending at an angle smaller than a right angle relative to the light emitting surface 12a in a direction far from the light emitting surface 12a, so that a projection of the light emitting end on a light entering end plane formed by the cross section of the light entering end is located in the light entering end plane, that is, an area of the light emitting end is smaller than an area of the light entering end. It is understood that the inclined light shielding section 221a is a part of the structure of the light shielding surface 221.
As shown in fig. 1, in the embodiment of the present application, the narrow viewing angle structure unit 20 includes a transparent substrate 24, a transparent adhesive layer 23, a light shielding structure 22, and a first adhesive layer 21; the transparent adhesive layer 23 is disposed on the lower surface of the transparent substrate 24, the transparent adhesive layer 23 has a bottom layer adjacent to the transparent substrate 24 and a retaining wall 231 facing the light emitting and display unit 10, the retaining wall 231 defines a plurality of grooves 232 corresponding to the light emitting surfaces 12a, and each light shielding surface 221 is disposed on a side surface of each groove 232. That is, the lower surface of the transparent adhesive layer 23 is patterned to form a retaining wall 231 and a plurality of grooves 232, the light shielding surface 221 of the light shielding structure 22 is disposed on the side surface of the grooves 232, the bottom of the grooves 232 is not provided with a light shielding structure to form a plurality of light emitting areas, and the light emitting areas correspond to the light emitting surfaces 12a of the micro light emitting units 12 for transmitting light.
It can be understood that the present embodiment illustrates a structure in which the plurality of retaining walls 231 are formed by using the transparent adhesive layer 23, but the structure of the retaining walls 231 may be formed by other ways, which does not depend on the transparent adhesive layer 23 completely, so that the narrow viewing angle structural unit 20 can be formed by providing the inclined light shielding section surface 221a on the side surface of the groove 232.
The first adhesive layer 21 is disposed in the groove 232, the first adhesive layer 21 is adhered between the light shielding surface 221 and the light emitting and display unit 10 to adhere and fix the light emitting and display unit 10 and the narrow viewing angle structure unit 20, the light shielding structure 22 is disposed around each light emitting surface 12a, and each light emitting area and each micro light emitting unit 12 are disposed correspondingly. The transparent substrate 24 is transparent glass or an organic transparent plate. Preferably, the transparent adhesive layer 23 is made of the same adhesive material as the first adhesive layer 21, and the material thereof includes an inorganic layer or an adhesive. The inorganic layer material comprises silicon nitride and silicon oxide, and has encapsulation effect; the adhesive comprises SCA optical adhesive, and the SCA optical adhesive (SolidOptically Clear Adhesive) is UV and moisture dual-curing optical adhesive and can be cured under the UV illumination condition. The cured optical adhesive has excellent weather resistance, particularly excellent anti-spreading and anti-explosion properties, greatly improves the safety, reliability, durability and aesthetic property of the display field, has the characteristics of high light adaptation rate, high bonding strength, low haze, low shrinkage, yellowing resistance and the like, and is mainly suitable for the full-lamination fields of medium-and-large-size computers, liquid crystal displays, all-in-one machines and the like. The materials of the first adhesive layer 21 and the transparent adhesive layer 23 are preferably SCA optical adhesive, so that the effect of protecting the micro led micro light emitting unit 12 in a sealing manner cannot be solved, and the light emitting and display unit 10 and the transparent substrate 24 can be directly connected. The first adhesive layer 21 and the transparent adhesive layer 23 are made of transparent materials, and are transparent at the positions corresponding to the light emitting areas, so that light rays are conveniently emitted from the light emitting areas.
Based on the fact that the upper surface of the micro light emitting unit 12 is the light emitting surface 12a, by making the upper surface of the flat layer 13 flush with the top surface of the micro light emitting unit 12 to be a flat plane, when the first adhesive layer 21 is attached to the flat layer 13 and the light emitting surface 12a of the micro light emitting unit 12, the attaching surface of the first adhesive layer 21 can be flat, and the height of the first adhesive layer 21 is uniform, so that the light emitted from the light emitting surface 12a of the micro light emitting unit 12 will not be deflected due to the non-uniform height of the first adhesive layer 21.
The narrow viewing angle structure unit 20 is attached to the light emitting and display unit 10, and is disposed on the micro light emitting unit 12 corresponding to the light shielding structure 22, so as to define the light emitting angle of the micro light emitting unit 12. With continued reference to fig. 1, a cross-sectional view of the light shielding structure 22 in a direction perpendicular to the light emitting surface 12a is shown, where a light shielding surface 221 of the light shielding structure 22 is disposed on a side surface of the retaining wall 231 for defining a light emitting angle of the light. Since the micro led micro light emitting unit 12 has a large light emitting angle, the half-peak angle is generally 120-140 °, but when the display device 100 of the present application is suitable for use in a HUD display screen, the light shielding structure 22 needs to be provided to define the light emitting angle range, and the light shielding effect of the light shielding structure 22 can be used to define the light emitting angle of the light passing through the gap, so as to achieve a narrow viewing angle effect.
In the embodiment of the present application, as shown in fig. 1, the included angle between the inclined light shielding section surface 221a and the light emitting surface 12a is between 30 ° and 70 °. For example, although fig. 1 shows an example in which the entire light shielding surface is the inclined light segment surface 221a, only one side may be the inclined light segment surface 221a, which is not shown. In some embodiments, the inclined light shielding section surface 221a is in a circular arc shape, so that the light shielding surface 221 is in a circular truncated cone shape from the light incident end to the light emergent end, and thus the whole light shielding structure 22 is spatially and three-dimensionally arranged around the micro light emitting unit 12, and the light shielding structure 22 is similar to an inverted horn shape; or the inclined light shielding section surface 221a is a plane, and the light shielding surface 221 has at least three inclined light shielding section surfaces 221a located on opposite surfaces, so that the light shielding surface 221 has a pyramid shape from the light incident end to the light emergent end. The light outlet is located at a side far away from the light emitting surface 12a of the micro light emitting unit 12, and is a light emitting area, so that the light emitted from the light emitting area is limited in a small emitting angle, and a narrow viewing angle effect is achieved. The light shielding structure 22 can limit the light emitted by the micro light emitting unit 12 to be transmitted to an adjacent area to avoid crosstalk and light mixing, and in this way, the light emitted by the micro light emitting unit 12 can only be emitted from the light outlet, so that the emitted light is limited in a small emitting angle to achieve a narrow viewing angle effect.
In the embodiment of the present application, each of the light shielding structures 22 has an inverted trapezoid shape in cross section in a direction perpendicular to the light emitting surface 12 a. The material of the light shielding structure 22 includes a black metal or a black resin. It can be understood that when the material of the light shielding structure 22 is black resin, the transparent substrate 24, the transparent adhesive layer 23, the light shielding structure 22 and the first adhesive layer 21, which are sequentially stacked from top to bottom and included in the narrow viewing angle structural unit 20, may be provided, the transparent adhesive layer 23 and the first adhesive layer 21 are both adhered and fixed, the light shielding structure 22 is in an inverted trapezoid structure, that is, the transparent adhesive layer 23 is a layer of film, and the light shielding structure 22 is a retaining wall with a light shielding function.
In the embodiment of the present application, the light emitting ends of the light shielding surface 221 have the same vertical height from the light emitting surface 12a in each direction. By this arrangement, when the light shielding structure 22 is like an inverted horn shape and the micro light emitting unit 12 is located in the middle of the groove 232, the light emitting angles at the two sides of the micro led micro light emitting unit 12 are consistent, and the light emitting angle range of the light emitted by the micro light emitting unit 12 can be strictly controlled. The height of the retaining wall 231 from the bottom of the groove 232 to the top of the groove 232 is 60um, and the coverage height of the light shielding surface 221 on the side surface of the retaining wall 231 is 30um-60um. Wherein "cover height" refers to a height at which the light shielding surface 221 of the light shielding structure 22 covers on the side surface of the retaining wall 231 in a direction perpendicular to the light emitting surface 12 a. Embodiments of the present application may define a range of light exit angles for a narrow viewing angle through this range of cover heights.
As shown in fig. 1, in the embodiment of the present application, the display device 100 further includes a polarizing structure unit 30, where the polarizing structure unit 30 is disposed on a side of the narrow viewing angle structure unit 20 facing away from the light emitting and display unit 10; the polarizing structure unit 30 includes a wedge-shaped light guide plate, and is configured to deflect the light transmitted through the narrow viewing angle structure unit 20 by an angle and then emit the light. The wedge structure of the polarization structure unit 30 has a polarization function, and realizes the angular deflection of light rays. When the heights of the side surfaces of the light shielding structure 22, which cover the grooves 232, are the same, the limited emergent angle range of the light emitted by the micro led micro light emitting unit 12 is bilaterally symmetrical, and the wedge-shaped structure of the polarizing structure unit 30 is used for guiding the light, so that the angle deflection of the emergent light can be realized. The light-polarizing structure unit 30 comprises a light-incident bottom surface and a light-emergent top surface, wherein an included angle larger than zero degrees is formed between the light-emergent top surface and the light-incident bottom surface, so that the light-emergent top surface is obliquely arranged relative to the light-incident bottom surface, and is wedge-shaped in longitudinal section, and light rays are incident into the light-polarizing structure unit 30 from the light-incident bottom surface and then deflected when being emitted from the light-emergent top surface. When the display device 100 is used as a HUD display screen, the deflection direction of the outgoing light can be directed towards the driver, so that the light can be prevented from being transmitted to the front windshield of the vehicle, and the light can be prevented from being transmitted to the face of the driver after being reflected by the front windshield, so that the light image of the HUD display screen can block or interfere with the sight of the driver.
The light incident bottom surface of the polarization structure unit 30 is parallel to the plane where the light emitting surface 12a of the micro light emitting unit 12 is located, and the light emitting top surface has an included angle greater than zero degrees with respect to the light incident bottom surface, and the included angle is between 5 ° and 40 °.
The display device 100 further includes a second adhesive layer 31 between the polarizing structure unit 30 and the narrow viewing angle structure unit 20. Preferably, the second adhesive layer 31 is made of the same material as the first adhesive layer 21.
Since the display device 100 is disposed around the micro light emitting unit 12 by using the light shielding structure 22 to define the light emitting angle of the micro light emitting unit 12, the light emitting control with a narrow viewing angle can be realized; and by using the polarization structure unit 30 disposed on the narrow viewing angle structure unit 20, a certain angle between the brightness peak angle (main light emitting direction) of the outgoing light and the normal direction of the screen can be formed, so that the micro led display device 100 can be used as a head-up display screen for vehicle-mounted display.
Based on the same inventive concept as the display device 100 described above, correspondingly, as shown in fig. 2, an embodiment of the present application further provides a manufacturing method of the display device 100, including steps S1-S3. Hereinafter, a specific description will be given with reference to fig. 3 and 4 in conjunction with fig. 2.
Step S1, providing a light-emitting and display unit. As shown in fig. 3, the light emitting and display unit 10 includes a driving substrate 11, and a plurality of micro led micro light emitting units 12 disposed on an upper surface of the driving substrate 11, where each micro light emitting unit 12 has a light emitting surface 12a parallel to the driving substrate 11, and the light emitting surface 12a is an upper surface of the micro light emitting unit 12. Preferably, the plurality of light emitting surfaces 12a are located on the same plane, that is, the plane on which the light emitting surface 12a of each micro light emitting unit 12 is located is parallel to the upper surface of the driving substrate 11.
Step S2, providing a narrow view angle structural unit, and attaching the narrow view angle structural unit to the light-emitting and display unit. As shown in fig. 1, the narrow viewing angle structure unit 20 is disposed on the light emitting and display unit 10, and includes a blocking wall 231 disposed corresponding to a gap between the micro light emitting units 10, and a light shielding structure 22 disposed on the blocking wall 231; the light shielding structure 22 has a plurality of light shielding surfaces 221 located on the surface of the retaining wall 231 and corresponding to each of the micro light emitting units 12, where each light shielding surface 221 has a light emitting end far from the light emitting surface 12a and a light entering end nearest to the periphery of the light emitting surface 12a, and at least one inclined light shielding section surface 221a extending at an angle smaller than a right angle relative to the light emitting surface 12a in a direction far from the light emitting surface 12a, so that a projection of the light emitting end on a light entering end plane formed by the cross section of the light entering end is located in the light entering end plane, i.e. the area of the light emitting end is smaller than that of the light entering end.
Wherein the step of providing a narrow viewing angle structure unit comprises: providing a transparent substrate 24; coating a transparent glue layer 23 on the transparent substrate 24; patterning the transparent adhesive layer 23 to form a retaining wall 231 close to the bottom layer of the transparent substrate 24 and far from the transparent substrate 24, wherein the retaining wall 231 defines a plurality of grooves 232 corresponding to the light emitting surfaces 12 a; the light shielding structure 22 is formed by covering the retaining wall 231 with a layer of light shielding material.
Wherein the step of forming the light shielding structure 22 includes: forming the light shielding material on a surface of the transparent substrate 24 having the barrier 231; the light shielding material is etched to remove the light shielding material at the bottom of the groove 232, so that the light shielding surface 221 is formed on the side surface of each groove 232. The light shielding material of the light shielding structure 22 includes a black metal or a black resin.
S3, attaching a polarized light structural unit. A polarizing structure unit 30 is attached to a side of the narrow viewing angle structure unit 20 facing away from the light emitting and display unit 10, the polarizing structure unit 30 includes a light incident bottom surface and a light emitting top surface, the light incident bottom surface is parallel to the light emitting surface 12a of the micro light emitting unit 12, and the light emitting top surface has an included angle greater than zero degrees relative to the light incident bottom surface, and the included angle is between 5 ° and 40 °.
Specifically, the step of attaching the polarization structure unit 30 may include: a polarizing structure unit 30 is attached to the transparent substrate 24 of the narrow viewing angle structure unit 20 through a second adhesive layer 31, and the polarizing structure unit 30 is used for deflecting the light transmitted through the narrow viewing angle structure unit 20 by a certain angle and then emitting the light.
Example 2
As shown in fig. 3, embodiment 2 of the present application includes most of the technical features of embodiment 1, and is different in that the light incident end of the light shielding surface 221 in embodiment 2 is located below the light emitting surface 12a of the micro light emitting unit 12, but the light incident end of the light shielding surface 221 in embodiment 1 is located in the same plane as the light emitting surface 12a of the micro light emitting unit 12.
Specifically, in embodiment 2, the light entrance end of the light shielding surface 221 of the light shielding structure 22 is disposed to extend into the gap between the micro light emitting units 12. On the one hand, the light shielding effect of the light shielding surface 221 and the retaining wall 231 can be fully utilized, so as to avoid the crosstalk of light rays of two adjacent micro light emitting units 12. And the thickness of the first adhesive layer 21 can be reduced, which reduces the material consumption of the first adhesive layer 21, is beneficial to saving the manufacturing cost and reducing the overall thickness of the display device 100. And the micro light emitting unit 12 is located between the two retaining walls 231, so that separation caused by transverse stress between the light emitting and display unit 10 and the narrow viewing angle structural unit 20 can be avoided, and the light emitting and display unit 10 and the narrow viewing angle structural unit 20 are adhered in a convex-concave manner, so that the contact area of adhesion can be increased, and the connection strength of the light emitting and display unit 10 and the narrow viewing angle structural unit 20 can be increased.
Example 3
As shown in fig. 4, embodiment 3 of the present application includes most of the technical features of embodiment 1, which is different in that the light shielding surfaces 221 of the light shielding structure 22 are not equal in height on both sides of the light emitting surface 12a in embodiment 3. Specifically, the light shielding structure 22 has a plurality of light shielding surfaces 221 located on the surface of the retaining wall 231 and corresponding to each of the micro light emitting units 12, each of the light shielding surfaces 221 has a light emitting end far away from the light emitting surface 12a and a light entering end nearest to the periphery of the light emitting surface 12a, and the light shielding surfaces 221 have inclined light shielding section surfaces 221a and 221b with different vertical heights, and the light emitting ends of the light shielding section surfaces 221a and 221b are different from the vertical height of the light emitting surface 12a, so that the plane formed by the light emitting ends is inclined by a specific angle relative to the light emitting surface 12 a. The specific angle refers to a fixed angle value, such as any value between 1 ° and 30 °. In this way, the light shielding range of the inclined light shielding section surface 221b with a lower height is smaller than that of the inclined light shielding section surface 221a with a higher height, so that the effect that the emergent light of the micro led micro light emitting unit 12 forms the deflection and the polarization structure unit 30 in the embodiment 1 can be omitted, which is beneficial to realizing ultrathin arrangement.
Based on the same inventive concept as the display device 100 of the present embodiment, referring to fig. 5, accordingly, embodiment 3 of the present application further provides a manufacturing method of the display device 100, which includes steps S11 and S12, corresponding to steps S1 and S2 of embodiment 1, respectively, wherein the difference is that the step of etching the light shielding material in step S12 is different, and the structure of the light shielding structure 22 is different.
Step S11, providing a light emitting and displaying unit. The light emitting and displaying unit 10 includes a driving substrate 11, and a plurality of micro led micro light emitting units 12 disposed on an upper surface of the driving substrate 11, wherein each micro light emitting unit 12 has a light emitting surface 12a parallel to the driving substrate 11, and the light emitting surface 12a is an upper surface of the micro light emitting unit 12. Preferably, the plurality of light emitting surfaces 12a are located on the same plane, that is, the plane on which the light emitting surface 12a of each micro light emitting unit 12 is located is parallel to the upper surface of the driving substrate 11.
Step S12, providing a narrow view angle structural unit, and attaching the narrow view angle structural unit to the light emitting and display unit. As shown in fig. 1, the narrow viewing angle structure unit 20 is disposed on the light emitting and display unit 10, and includes a blocking wall 231 disposed corresponding to a gap between the micro light emitting units 10, and a light shielding structure 22 disposed on the blocking wall 231; the light shielding structure 22 has a plurality of light shielding surfaces 221 located on the surface of the retaining wall 231 and corresponding to each micro light emitting unit 12, each light shielding surface 221 has a light emitting end far away from the light emitting surface 12a, and a light incident end nearest to the periphery of the light emitting surface 12a, and the light shielding surfaces 221 have inclined light shielding section surfaces 221a and 221b with different vertical heights, the light emitting ends of the inclined light shielding section surfaces 221a and 221b are different from the vertical height of the light emitting surface 12a, and extend in a direction away from the light emitting surface 12a at an angle smaller than a right angle relative to the light emitting surface 12a, so that the projection of the light emitting end on the light incident end plane formed by the cross section of the light incident end is located in the light incident end plane.
Wherein the step of providing a narrow viewing angle structure unit comprises: providing a transparent substrate 24; coating a transparent glue layer 23 on the transparent substrate 24; patterning the transparent adhesive layer 23 to form a retaining wall 231 close to the bottom layer of the transparent substrate 24 and far from the transparent substrate 24, wherein the retaining wall 231 defines a plurality of grooves 232 corresponding to the light emitting surfaces 12 a; the light shielding structure 22 is formed by covering the retaining wall 231 with a layer of light shielding material.
Wherein the step of forming the light shielding structure 22 includes: forming the light shielding material on a surface of the transparent substrate 24 having the barrier 231; the light shielding material is etched to remove the light shielding material at the bottom of the groove 232, so that the light shielding surface 221 is formed on the side surface of each groove 232. The light shielding material of the light shielding structure 22 includes a black metal or a black resin.
The step of etching the light shielding material in this embodiment is different from the step of etching the light shielding material in embodiment 1 in that the light shielding material on the side surface of the recess 232 is removed more than the part of the light shielding material near the bottom of the recess 232, so that the light shielding surface 221 has the inclined light shielding section 221a and the inclined light shielding section 221b with different vertical heights. Specifically, the light-emitting ends of the light-shielding section surface 221a and the inclined light-shielding section surface 221b are different in vertical height from the light-emitting surface 12 a. The step of etching the shading material comprises the following steps: the light shielding material on the side surface of the recess 232 is removed and partially near the bottom of the recess 232, so that the vertical heights of the light emitting ends of the light shielding surface 221 from the light emitting surface 12a are different, and the plane formed by the light emitting ends is inclined at a specific angle relative to the light emitting surface 12 a. The specific angle refers to a fixed angle value, such as any value between 1 ° and 30 °.
However, the present application is not strictly limited to the polarizing structure unit 30 in example 1, and the step may be included in example 3: s3, a step of fabricating the polarized light structure unit 30 is performed, and the method for fabricating the display device 100 according to the embodiment of the application is shown in steps S1-S3 of FIG. 2.
However, it should be noted that the manufacturing method of the display device 100 according to the present embodiment preferably includes steps S11 and S12, so that the polarization structure unit 30 in the embodiment 1 can be reduced, which is beneficial to realizing ultra-thin arrangement, saving manufacturing cost and reducing overall thickness.
Example 4
As shown in fig. 6, embodiment 4 of the present application includes most of the technical features of embodiment 3, and is different in that the light incident end of the light shielding surface 221 in embodiment 4 is located below the light emitting surface 12a of the micro light emitting unit 12, but the light incident end of the light shielding surface 221 in embodiment 3 is located in the same plane as the light emitting surface 12a of the micro light emitting unit 12.
Specifically, in embodiment 4, the light incident end of the light shielding surface 221 of the light shielding structure 22 is disposed to extend into the gap between the micro light emitting units 12. On the one hand, the light shielding effect of the light shielding surface 221 and the retaining wall 231 can be fully utilized, so as to avoid the crosstalk of light rays of two adjacent micro light emitting units 12. And the thickness of the first adhesive layer 21 can be reduced, which reduces the material consumption of the first adhesive layer 21, is beneficial to saving the manufacturing cost and reducing the overall thickness of the display device 100. And the micro light emitting unit 12 is located between the two retaining walls 231, so that separation caused by transverse stress between the light emitting and display unit 10 and the narrow viewing angle structural unit 20 can be avoided, and the light emitting and display unit 10 and the narrow viewing angle structural unit 20 are adhered in a convex-concave manner, so that the contact area of adhesion can be increased, and the connection strength of the light emitting and display unit 10 and the narrow viewing angle structural unit 20 can be increased.
The foregoing has described in detail a display device and a method for manufacturing the same, which are provided by the embodiments of the present application, wherein specific examples are applied to illustrate the principles and embodiments of the present application, and the above description of the embodiments is only for helping to understand the method and core idea of the present application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present application, the present description should not be construed as limiting the present application.
Claims (15)
- A display device, comprising:the light-emitting and display unit comprises a driving substrate and a plurality of micro LED micro light-emitting units positioned on the driving substrate, wherein each micro light-emitting unit is provided with a light-emitting surface parallel to the driving substrate; andthe narrow visual angle structure unit is arranged on the light emitting and display unit and comprises a retaining wall arranged corresponding to the gap between the micro light emitting units and a shading structure arranged on the retaining wall; the light shielding structure is provided with a plurality of light shielding surfaces which are positioned on the surface of the retaining wall and correspond to the micro light emitting units, each light shielding surface is provided with a light emitting end far away from the light emitting surface and a light entering end nearest to the periphery of the light emitting surface, and at least one inclined light shielding section surface which extends to a direction far away from the light emitting surface at an angle smaller than a right angle relative to the light emitting surface is provided, so that the projection of the light emitting end on a light entering end plane formed by the cross section of the light entering end is positioned in the light entering end plane.
- The display device of claim 1, wherein the narrow viewing angle structure unit further comprises:a transparent substrate; andthe transparent adhesive layer is provided with a bottom layer close to the transparent substrate and a retaining wall facing the light-emitting and display unit, the retaining wall defines a plurality of grooves corresponding to the light-emitting surfaces, and the light-shielding surfaces are arranged on the side surfaces of the grooves.
- The display device of claim 1, wherein the inclined light-shielding section surface forms an angle of between 30 ° and 70 ° with the light-emitting surface.
- The display device according to claim 1, wherein the inclined light shielding section is in a circular arc shape, and the light shielding surface is in a circular truncated cone shape from the light entrance end to the light exit end; or (b)The inclined shading section surface is a plane, and the shading surface is provided with at least three inclined shading section surfaces which are positioned on opposite surfaces, so that the shading surface is in a prismatic table shape from the light inlet end to the light outlet end.
- The display device of claim 1, wherein the light-emitting end of the light-shielding surface has the same vertical height from the light-emitting surface at each azimuth.
- The display device according to claim 5, further comprising:the polarized light structure unit is arranged on one side of the narrow visual angle structure unit, which is away from the light emitting and displaying unit; the light incident bottom surface is parallel to the light emitting surface, and the included angle between the light incident bottom surface and the light emitting top surface is 5-40 degrees.
- The display device of claim 6, further comprising a second adhesive layer between the polarizing structure unit and the narrow viewing angle structure unit.
- The display device of claim 1, wherein the light shielding surface has a coverage height on the side of the retaining wall in the range of 30um to 60um.
- The display device of claim 1, wherein the narrow viewing angle structure unit further comprises a first adhesive layer; the first adhesive layer is arranged between the light shielding surfaces and the light emitting and displaying units and is used for sticking and fixing the light emitting and displaying units and the narrow-view-angle structural units.
- The display device according to claim 1, wherein light emitting ends of the at least two inclined light shielding section surfaces located on opposite sides are different in vertical height from the light emitting surface.
- A method of manufacturing a display device, comprising the steps of:providing a light-emitting and display unit, wherein the light-emitting and display unit comprises a driving substrate and a plurality of micro LED micro light-emitting units positioned on the driving substrate, and each micro light-emitting unit is provided with a light-emitting surface parallel to the driving substrate; andproviding a narrow visual angle structural unit and attaching the narrow visual angle structural unit to the light-emitting and display unit, wherein the narrow visual angle structural unit comprises a retaining wall arranged corresponding to a gap between each micro light-emitting unit and a shading structure arranged on the retaining wall; the light shielding structure is provided with a plurality of light shielding surfaces which are positioned on the surface of the retaining wall and correspond to the micro light emitting units, each light shielding surface is provided with a light emitting end far away from the light emitting surface and a light entering end nearest to the periphery of the light emitting surface, and at least one inclined light shielding section surface which extends to a direction far away from the light emitting surface at an angle smaller than a right angle relative to the light emitting surface is provided, so that the projection of the light emitting end on a light entering end plane formed by the cross section of the light entering end is positioned in the light entering end plane.
- The method for manufacturing a display device according to claim 11, further comprising:and one side of the narrow visual angle structural unit, which is far away from the light-emitting and display unit, is attached with a polarized light structural unit, the polarized light structural unit comprises a light-in bottom surface and a light-out top surface, the light-in bottom surface is arranged in parallel with the light-emitting surface, and the included angle between the light-in bottom surface and the light-out top surface is 5-40 degrees.
- The method of claim 11, wherein the step of providing the narrow viewing angle structure unit comprises:providing a transparent substrate;coating a transparent glue layer on the transparent substrate;patterning the transparent adhesive layer to form a bottom layer close to the transparent substrate and a retaining wall far away from the transparent substrate, wherein the retaining wall defines a plurality of grooves corresponding to the luminous surfaces;and covering a layer of shading material on the retaining wall to form the shading structure.
- The method of manufacturing a display device according to claim 13, wherein the step of forming the light shielding structure includes:forming the shading material on the surface of the side, with the retaining wall, of the transparent substrate;etching the shading material to remove the shading material at the bottom of the groove, and forming the shading surface on each groove side surface.
- The method of claim 14, wherein the etching the light shielding material comprises: and removing the shading material of the upper part of the side surface of the groove, which is close to the bottom of the groove, so that the vertical heights of the light emitting ends of the shading surface from the light emitting surface are different.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2022/070841 WO2023130391A1 (en) | 2022-01-07 | 2022-01-07 | Display apparatus and manufacturing method therefor |
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| Publication Number | Publication Date |
|---|---|
| CN116745918A true CN116745918A (en) | 2023-09-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202280000016.5A Pending CN116745918A (en) | 2022-01-07 | 2022-01-07 | Display device and manufacturing method thereof |
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| CN (1) | CN116745918A (en) |
| WO (1) | WO2023130391A1 (en) |
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| JP2011053386A (en) * | 2009-09-01 | 2011-03-17 | Seiko Epson Corp | Display device, electronic equipment, and projection-type video apparatus |
| CN107401704A (en) * | 2017-08-01 | 2017-11-28 | 苏州欧普照明有限公司 | Projecting Lamp and its control method and controller, display system |
| JP7075437B2 (en) * | 2019-04-23 | 2022-05-25 | シャープ株式会社 | Image display element |
| KR20200127777A (en) * | 2019-05-03 | 2020-11-11 | 삼성전자주식회사 | Led display module, manufacturing method for led display module and display device including led display module |
| CN110263773B (en) * | 2019-07-31 | 2021-08-06 | 厦门天马微电子有限公司 | Display module, display device and manufacturing method of grating film layer |
| CN113745388B (en) * | 2020-05-29 | 2023-10-24 | 成都辰显光电有限公司 | Color film substrate, display panel and manufacturing method thereof |
| CN212749475U (en) * | 2020-08-03 | 2021-03-19 | 昆山龙腾光电股份有限公司 | Lamp panel, backlight module and peep-proof display device |
-
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- 2022-01-07 CN CN202280000016.5A patent/CN116745918A/en active Pending
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