CN115954428A

CN115954428A - Display panel

Info

Publication number: CN115954428A
Application number: CN202310170451.9A
Authority: CN
Inventors: 张建英; 康报虹
Original assignee: HKC Co Ltd
Current assignee: HKC Co Ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-04-11
Anticipated expiration: 2043-02-27
Also published as: CN115954428B

Abstract

The application provides a display panel, which comprises a substrate, the drive circuit layer, a plurality of electrodes, a plurality of luminous chip, and the reflection stratum, the drive circuit layer sets up on the substrate surface, a plurality of electrode intervals set up on the drive circuit layer surface, a plurality of luminous chip intervals set up the surface on the drive circuit layer, and a plurality of luminous chip are connected with the drive circuit layer electricity through a plurality of electrodes, the reflection stratum sets up in the surface that deviates from the base plate on the drive circuit layer, the reflection stratum includes a plurality of reflection configuration, and every reflection configuration is located between two adjacent luminous chips, the shape of reflection configuration is protruding type body, the protruding type face of protruding type body deviates from the drive circuit layer, protruding type face is not higher than the surface that the luminous chip deviates from the drive circuit layer. When the display panel is irradiated by ambient light, the ambient light is reflected to the light-emitting chip after being reflected by the convex cambered surface of the reflecting layer, so that the reflection to human eyes is avoided, and the display effect and the user experience are enhanced.

Description

Display panel

Technical Field

The present application relates to the field of display technologies, and in particular, to a display panel.

Background

An inorganic Micro-LED (Micro-light Emitting Diode) display panel is one of the focuses of research in the current display field, and compared with an organic light-Emitting Diode (OLED) display panel, the Micro-LED display panel has the advantages of high reliability, low power consumption, high brightness, fast response speed, and the like.

However, the existing Micro-LED display panel has insufficient display effect and user experience.

Therefore, how to improve the display effect of the Micro-LED display panel is a problem to be solved urgently at present.

Disclosure of Invention

In view of the foregoing technical problem, the present application provides a display panel, which improves the display effect and the user experience of the display panel.

In a first aspect, the present application provides a display panel comprising:

a substrate;

a driving circuit layer disposed on a surface of the substrate;

a plurality of electrodes arranged at intervals on the surface of the driving circuit layer, which faces away from the substrate; and

the light-emitting chips are arranged on the surface of the driving circuit layer, which is far away from the substrate, at intervals, and are electrically connected with the driving circuit layer through the electrodes;

still include the reflection stratum, set up and deviate from in the drive circuit layer the surface of base plate, the reflection stratum includes a plurality of reflection configuration, and every reflection configuration is located between two adjacent luminescence chips, reflection configuration's shape is protruding type body, protruding type body includes protruding profile, protruding profile deviates from the drive circuit layer, the protruding type face of protruding type body is not higher than luminescence chip deviates from the surface on drive circuit layer.

Optionally, the convex body further comprises a bottom surface, the bottom surface being adjacent to the driving circuit layer; the convex profile is a cambered surface, and the arc length of the cambered surface is greater than the width of the bottom surface.

Optionally, the convex surface of the convex body is lower than the surface of the light emitting chip facing away from the driving circuit layer.

Optionally, the display device further includes a plurality of light absorbing walls disposed on the surface of the driving circuit layer, and each light absorbing wall is embedded in one of the reflecting structures and perpendicular to the substrate.

Optionally, the light absorbing wall is embedded in the middle of the corresponding reflection structure and protrudes out of the corresponding reflection structure.

Optionally, a surface of the light absorbing wall, which is away from the driving circuit layer, is flush with a surface of the light emitting chip, which is away from the driving circuit layer, or the surface of the light absorbing wall, which is away from the driving circuit layer, is lower than a surface of the light emitting chip, which is away from the driving circuit layer.

Optionally, a filter layer is further included; a gap exists between the reflecting layer and the electrode, and the filter layer is arranged in the gap.

Optionally, the reflective structure further comprises a metal layer disposed on the convex surface of the reflective structure.

Optionally, the light-absorbing layer is arranged on the surface of the driving circuit layer, which faces away from the substrate, and the reflecting layer is arranged on the surface of the light-absorbing layer, which faces away from the driving circuit layer.

Optionally, the reflective layer comprises a light absorbing material and the convex profile of the reflective structure is provided with a metal layer.

The beneficial effect of this application: be different from prior art, among the display panel that this application provided, including the reflection configuration of convex type body between the adjacent luminous chip, the surface that the base plate was kept away from to convex type body is convex type face, and when display panel received ambient light illumination, ambient light avoided reflecting to people's eye, reinforcing display effect and user experience on the luminous chip through the reflection after reflection of the convex type face of reflection configuration. In addition, the reflecting layer can reflect the ambient light, so that the driving circuit layer is prevented from being subjected to migration of ambient light irradiation ions, the stability of the driving circuit layer is improved, and the display effect of the display panel is further enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of a Micro-LED display panel provided in a first embodiment of the present application;

FIG. 2 is a schematic diagram of a Micro-LED display panel reflecting ambient light according to an embodiment of the present disclosure;

FIG. 3 is a flow chart of the fabrication of a reflective structure in a Micro-LED display panel according to one embodiment of the present application;

FIG. 4 is a schematic structural view of a Micro-LED display panel provided in a second embodiment of the present application;

FIG. 5 is a schematic view of a Micro-LED display panel according to a third embodiment of the present application;

FIG. 6 is a schematic view of a Micro-LED display panel according to a fourth embodiment of the present application;

FIG. 7 is a schematic view of a Micro-LED display panel according to a fifth embodiment of the present application;

fig. 8 is a schematic structural diagram of a Micro-LED display panel according to a sixth embodiment of the present application.

The reference numbers illustrate:

the Micro-LED display panel comprises a Micro-LED display panel-100, a substrate-10, a driving circuit layer-11, an electrode-12, a light emitting chip-13, a reflecting layer-14, a reflecting structure-141, a bottom surface-142, a convex surface-143, a first layer of insulating material-144, a mask-145, a protruding structure-146, a second layer of insulating material-147, a semi-permeable membrane mask-148, a light absorbing wall-15, a light filtering layer-16, a first light filtering layer-161, a second light filtering layer-162, a third light filtering layer-163, a metal layer-17 and a light absorbing layer-18.

Detailed Description

The following describes in detail the embodiments of the present application with reference to the drawings attached hereto.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, interfaces, techniques, etc. in order to provide a thorough understanding of the present application.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

The terms "first" and "second" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. In the embodiment of the present application, all the directional indicators (such as upper, lower, left, right, front, and rear … …) are used only to explain the relative positional relationship between the components, the movement, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The inventor of the application finds that when the existing Micro-LED display panel is irradiated by external environment light, part of the light can be reflected to human eyes, and therefore the display effect and the user experience of the Micro-LED display panel are influenced. Moreover, when a driving circuit layer in the Micro-LED display panel is illuminated, ions are easy to migrate, the driving operation becomes unstable, and the display effect of the Micro-LED display panel is also affected.

Referring to fig. 1, a Micro-LED display panel 100 is provided according to a first embodiment of the present disclosure. The Micro-LED display panel 100 includes a substrate 10, a driving circuit layer 11, a plurality of electrodes 12, a plurality of light emitting chips 13, and a reflective layer 14. The driving circuit layer 11 is disposed on the surface of the substrate 10. A plurality of electrodes 12 are arranged at intervals on the surface of the driving circuit layer 11 facing away from the substrate 10. The plurality of light emitting chips 13 are arranged at intervals on the surface of the driving circuit layer 11 opposite to the substrate 10, and the plurality of light emitting chips 13 are electrically connected with the driving circuit layer 11 through the plurality of electrodes 12. The plurality of electrodes 12 are located between the driving circuit layer 11 and the plurality of light emitting chips 13. The reflective layer 14 includes a plurality of reflective structures 141, the reflective structures 141 are disposed at intervals on the surface of the driving circuit layer 11 away from the substrate 10, and one reflective structure 141 is located between two adjacent light emitting chips 13. The reflective structure 141 is shaped as a convex body, the convex body includes a bottom surface 142 and a convex surface 143, such as a convex curved surface, a convex arc surface, or a convex folded surface, which are disposed opposite to each other, the bottom surface 142 is close to the driving circuit layer 11, and the convex surface 143 is away from the driving circuit layer 11.

The material of the substrate 10 may be any commonly used material for substrates in existing Micro-LED display panels. The material of the substrate 10 may be a hard material, a flexible material, a transparent material, an opaque material, or the like. By way of example, the material of the substrate 10 may include, but is not limited to, glass, silicon, aluminum, copper, aluminum nitride, aluminum oxide, metal composites, and the like. In this embodiment, the substrate 10 is made of glass.

The driving circuit layer 11 is used to control the light emitting chips 13 to emit light, and the driving circuit layer 11 may be any driving circuit layer in an existing Micro-LED display panel, which is not limited herein.

The material of the electrode 12 is not limited as long as the plurality of light emitting chips 13 can be electrically connected to the driving circuit layer 11. By way of example, the material of the electrode 12 may include, but is not limited to, copper, graphite, gold, iron, silver, and tungsten alloys, among others. In this embodiment, the material of the electrode 12 is copper.

The light emitting chip 13 is not limited in structure, and may be a flip chip structure, for example. The plurality of light emitting chips 13 are arranged in an array on the surface of the substrate 10. In this embodiment, the plurality of light emitting chips 13 include a red light emitting chip, a green light emitting chip, and a blue light emitting chip.

The reflective layer 14 is disposed on the surface of the driving circuit layer 11 away from the substrate 10 and between two adjacent light emitting chips 13. Referring to fig. 2, when the Micro-LED display panel is illuminated by ambient light, the ambient light is reflected by the convex surface of the reflective structure 141 in the reflective layer 14 and then reflected onto the light emitting chip 13, so as to avoid being reflected to human eyes, thereby enhancing the display effect and the user experience; meanwhile, the reflected light is reflected to the light emitting chip 13, so that the brightness emitted by the light emitting chip 13 is higher, and the display effect is further enhanced. In addition, the reflective layer 14 can reflect ambient light, so that ions irradiated by the ambient light on the driving circuit layer 11 are prevented from migrating, the stability of the driving circuit layer 11 is improved, and the display effect of the Micro-LED display panel is further enhanced.

The convex surface 143 of the convex body is not higher than the surface of the light emitting chip 13 departing from the driving circuit layer 11, so that partial ambient light is prevented from being reflected to human eyes after being reflected by the convex surface 143 of the reflecting structure 141, and the display effect and the user experience are prevented from being influenced. In this embodiment, the convex surface 143 of the convex body is lower than the surface of the light emitting chip 13 away from the driving circuit layer 11.

The arc length of the convex surface 143 of the convex body is greater than the width of the bottom surface 142, so as to ensure that the ambient light irradiated on the reflective layer 14 is totally reflected onto the light emitting chip 13. The bottom surface 142 of the convex body may be, but is not limited to, rectangular, square, circular, oval, or other irregular shapes. When the bottom surface 142 of the convex body is circular, the width of the bottom surface 142 is the diameter of the circle; when the bottom surface 142 of the convex body is oval, the width of the bottom surface 142 is the maximum diameter of the oval; when the bottom surface 142 of the convex body is in another irregular pattern, the width of the bottom surface 142 is the maximum width of the irregular pattern. In this embodiment, the bottom surface 142 of the convex body is rectangular.

The material of the reflective layer 14 may be selected from insulating materials to avoid the influence of the reflective layer 14 on the driving circuit layer 11. By way of example, the material of the reflective layer 14 includes, but is not limited to, glass, nano-zirconia, alumina, and the like. In this embodiment, the material of the reflective layer 14 is nano zirconium dioxide.

Referring to fig. 3, a method for manufacturing the reflective structure 141 includes: coating a first layer of insulating material 144 on the driving circuit layer 11; performing exposure processing using the reticle 145; the development process obtains the protruding structures 146, and the protruding structures 146 protrude on the surface of the driving circuit layer 11; coating a second layer of insulating material 147 on the surface of the protruding structures 146 and the surface of the driving circuit layer 11 without the protruding structures 146; performing a second exposure process using a semi-permeable membrane mask 148, wherein the semi-permeable membrane mask 148 has a position corresponding to the protruding structures 146; and a development process to obtain the reflective structure 141.

In this embodiment, the semi-permeable membrane mask refers to a semi-permeable membrane with a central transmittance of 100%, and the transmittances of the left and right sides gradually decrease with increasing distance from the center of the semi-permeable membrane until the transmittances of the left and right edge regions of the semi-permeable membrane are 0. The semi-permeable membrane mask 148 is adopted to enable the formed reflecting structure 141 to be a convex body, so that the process is simple and the cost is low.

The surface of the projection structure 146 facing away from the substrate 10 may optionally be planar. The protruding structures 146 include, but are not limited to, trapezoidal structures, cuboids, cubes, cylinders, and the like. In this embodiment, the protrusion structure 146 is a trapezoid structure.

The Micro-LED display panel 100 may further include an encapsulation layer (not shown) for encapsulating the entire Micro-LED display panel 100.

Referring to fig. 4, a second embodiment of the present application provides a Micro-LED display panel 100. This embodiment is substantially the same as the first embodiment except that the Micro-LED display panel 100 of the second embodiment of the present application further includes a plurality of light-absorbing walls 15 disposed on the surface of the driving circuit layer 11, and each light-absorbing wall 15 is embedded in one of the reflective structures 141 and is perpendicular to the substrate 10.

Specifically, the light absorbing wall 15 is embedded in the middle of the corresponding reflective structure 141 and protrudes from the corresponding reflective structure 141. The surface of the light-absorbing wall 15 facing away from the driving circuit layer 11 is flush with the surface of the light-emitting chip 13 facing away from the driving circuit layer 11, or the surface of the light-absorbing wall 15 facing away from the driving circuit layer 11 is lower than the surface of the light-emitting chip 13 facing away from the driving circuit layer 11. In this embodiment, the light absorption wall 15 is a rectangular solid, the width of the light absorption wall 15 is 1~2 μm, and the surface of the light absorption wall 15 departing from the driving circuit layer 11 is flush with the surface of the light emitting chip 13 departing from the driving circuit layer 11. Of course, the shape and size of the light absorbing wall 15 are not limited to the embodiment, and other choices may be made according to the implementation requirements.

The material of the light-absorbing wall 15 includes, but is not limited to, black polyester film, insulating epoxy resin ink, dark resin, and the like. In this embodiment, the light absorbing wall 15 is made of black resin.

The light absorption wall 15 is arranged, so that the reflection of ambient light can be prevented, the display effect can be enhanced, the risk of color mixing caused by the fact that light reflected to the light emitting chips 13 is reflected to the adjacent light emitting chips 13 again can be avoided, in addition, the light absorption wall 15 can also absorb partial ambient light to avoid the reflection of the partial ambient light to human eyes, and the display effect of the Micro-LED display panel 100 can be further enhanced.

Referring to fig. 5, a Micro-LED display panel 100 is provided according to a third embodiment of the present application. This embodiment is substantially the same as the first embodiment except that the Micro-LED display panel 100 of the third embodiment of the present application further includes a filter layer 16, the filter layer 16 being disposed in the gap between the reflective layer 14 and the electrode 12.

Materials for filter layer 16 include, but are not limited to, black mylar, insulating epoxy ink, black resin. In this embodiment, the material of the filter layer 16 is black resin.

The color of the filter layer 16 is the same as the color of the light emitted by the adjacent light emitting chip 13, so that the light reflected by the light emitting chip 13 is prevented from being reflected again to the driving circuit layer 11 to affect the driving operation thereof while preventing the ambient light from being reflected to the human eyes and enhancing the display effect.

In this embodiment, the filter layer 16 includes the first filter layer 161, the second filter layer 162, the third filter layer 163, and the colors of the first filter layer 161, the second filter layer 162, and the third filter layer 163 are red, green, and blue, respectively.

Referring to fig. 6, a Micro-LED display panel 100 is provided according to a fourth embodiment of the present application. This embodiment is substantially the same as the first embodiment except that the Micro-LED display panel 100 of the fourth embodiment of the present application further includes a metal layer 17, and the metal layer 17 is disposed on the convex surface 143 of the reflective structure 141 of the reflective layer 14.

The material of the metal layer 17 is not limited as long as the convex surface 143 of the reflective structure 141 can form a mirror effect. By way of example, the metal layer 17 includes, but is not limited to, copper, aluminum, silver, and the like. In this embodiment, the metal layer 17 is made of aluminum.

The metal layer 17 enables the convex surface 143 of the reflective structure 141 to form a mirror effect, so as to ensure that all the ambient light irradiated to the reflective layer 14 can be reflected to the light emitting chip 13; the display device can prevent the reflection of the ambient light to human eyes and enhance the display effect, and simultaneously prevent part of the ambient light from transmitting to the driving circuit layer 11 to influence the driving operation of the driving circuit layer.

Referring to fig. 7, a Micro-LED display panel 100 is provided according to a fifth embodiment of the present application. This embodiment is substantially the same as the first embodiment except that the Micro-LED display panel 100 of the fifth embodiment of the present application further includes a light absorbing layer 18, the light absorbing layer 18 being located on the surface of the driving circuit layer 11, and the reflective layer 14 being disposed on the surface of the light absorbing layer 18 away from the driving circuit layer 11.

Specifically, the light absorbing layer 18 covers the entire driving circuit layer 11, the light absorbing layer 18 having an opening through which the plurality of electrodes 12 are disposed.

The light absorbing layer 18 includes a light absorbing material, optionally having an absorbance of 90% or greater, illustratively including but not limited to metals, metal oxides, dark colored resins, inks, and the like. In this embodiment, the light absorbing layer 18 is made of black resin.

The light absorbing layer 18 can prevent the ambient light from reflecting to human eyes and enhance the display effect, and simultaneously prevent part of the ambient light from transmitting to the driving circuit layer 11 to influence the driving operation thereof.

Referring to fig. 8, a Micro-LED display panel 100 is provided according to a sixth embodiment of the present application. This embodiment is substantially the same as the fifth embodiment except that the material of the reflective layer 14 in the Micro-LED display panel 100 of the sixth embodiment of the present application includes a light absorbing material, and the metal layer 17 is disposed on the convex surface 143 of the reflective structure 141 of the reflective layer 14.

The light absorbing material may optionally have an absorbance of 90% or greater, and the material of the reflective layer 14 may include, but is not limited to, metal oxide, dark colored resin, and the like, as examples.

Specifically, the reflective layer 14 and the light absorbing layer 18 may be separate structures or may be an integral structure. When the reflective layer 14 and the light absorbing layer 18 are separate structures, the material of the reflective layer 14 may be the same as or different from that of the light absorbing layer 18. In this embodiment, the reflective layer 14 and the light absorbing layer 18 are of an integral structure, and the reflective layer 14 and the light absorbing layer 18 are made of black resin.

The metal layer 17 enables the convex surface 143 of the reflective structure 141 to form a mirror effect, so as to ensure that all the ambient light irradiated to the reflective layer 14 can be reflected to the light emitting chip 13; the material of the reflecting layer 14 comprises a material with the light absorption rate of more than or equal to 90% while preventing the ambient light from reflecting to human eyes and enhancing the display effect, so that the influence of partial ambient light transmitting to the driving circuit layer 11 on the driving work is avoided; moreover, the manufacturing process is simplified, and the production cost is saved.

In the Micro-LED display panel provided by the application, the convex body reflection structure is arranged between the adjacent light emitting chips, the surface of the convex body, which is far away from the substrate, is a convex surface, when the Micro-LED display panel is irradiated by ambient light, the ambient light is reflected to the light emitting chips after being reflected by the convex surface of the reflection structure, so that the reflection to human eyes is avoided, and the display effect and the user experience are enhanced; meanwhile, as the reflected light is reflected to the light-emitting chip, the brightness emitted by the light-emitting chip is higher, and the display effect is further enhanced. In addition, the reflecting layer can reflect ambient light, so that ions irradiated by the ambient light on the driving circuit layer are prevented from migrating, the stability of the driving circuit layer is improved, and the display effect of the Micro-LED display panel is further enhanced.

The application further provides a display device which comprises the Micro-LED display panel provided by any one of the above embodiments. By way of example, the display device may be, but is not limited to, various virtual display glasses, large screen projection, television, cell phone, computer, and the like.

The technical solution of the present application is not limited to the Micro-LED display panel in the embodiment of the present application, and the technical solution of the present application is also applicable to other LED display panels, for example, a mini-LED display panel, a small-pitch LED display panel, and the like.

The above embodiments are merely examples and are not intended to limit the scope of the present disclosure, and all modifications, equivalents, and flow charts using the contents of the specification and drawings are included in the scope of the present disclosure.

Claims

1. A display panel, comprising:

a substrate;

a driving circuit layer disposed on a surface of the substrate;

the light-emitting chip packaging structure is characterized by further comprising a reflecting layer which is arranged on the surface of the substrate deviating from the driving circuit layer, the reflecting layer comprises a plurality of reflecting structures, each reflecting structure is located between two adjacent light-emitting chips, the reflecting structures are in a convex shape, each convex shape comprises a convex surface, each convex surface deviates from the driving circuit layer, and the convex surfaces of the convex shapes are not higher than the light-emitting chips deviate from the surface of the driving circuit layer.

2. The display panel according to claim 1, wherein the convex body further comprises a bottom surface adjacent to the driving circuit layer; the convex profile is an arc surface, and the arc length of the arc surface is greater than the width of the bottom surface.

3. The display panel according to claim 1, wherein a convex surface of the convex body is lower than a surface of the light emitting chip facing away from the driving circuit layer.

4. The display panel according to any one of claims 1-3, further comprising a plurality of light absorbing walls disposed on the surface of the driving circuit layer, wherein each light absorbing wall is embedded in one of the reflective structures and perpendicular to the substrate.

5. The display panel according to claim 4, wherein the light-absorbing wall is embedded in the middle of the corresponding reflective structure and protrudes from the corresponding reflective structure.

6. The display panel according to claim 4, wherein a surface of the light absorbing wall facing away from the driving circuit layer is flush with a surface of the light emitting chip facing away from the driving circuit layer, or a surface of the light absorbing wall facing away from the driving circuit layer is lower than a surface of the light emitting chip facing away from the driving circuit layer.

7. The display panel according to any one of claims 1 to 3, further comprising a filter layer; a gap exists between the reflecting layer and the electrode, and the filter layer is arranged in the gap.

8. A display panel as claimed in any one of claims 1-3, characterized in that it further comprises a metal layer arranged on the convex profile of the reflective structure.

9. The display panel according to any one of claims 1 to 3, further comprising a light absorbing layer on a surface of the drive circuit layer facing away from the substrate, wherein the reflective layer is provided on a surface of the light absorbing layer facing away from the drive circuit layer.

10. A display panel as claimed in claim 9 characterized in that the reflective layer comprises a light absorbing material and the convex profile of the reflective structure is provided with a metal layer.