Display backboard, panel, device, backlight module and manufacturing method

Abstract

The invention discloses a display backboard, a panel, a device, a backlight module and a manufacturing method, the display backboard comprises a driving substrate and a plurality of light-emitting units arranged on the driving substrate, each light-emitting unit comprises a lens and at least one light-emitting chip located in the lens, light emitted by the light-emitting chip is refracted by the lens and then converged to a preset angle range. By arranging the lens, light emitted by the light-emitting chip can be converged, and display distortion and light waste are avoided.

Description

Technical Field

[0001] The present application relates to the field of display, and in particular to a display backplane, panel, device, backlight module and manufacturing method. Background Art

[0002] With the development of technology, people have a higher and higher demand for display products, and display technologies such as VR, XR, and AR have emerged. Among them, the market is increasingly interested in AR display products. As we all know, AR products are near-eye display products, so they do not require a very large field of view. The field of view of products on the market is the FOV level: 20-30° for monocular and 40-50° for binocular. Therefore, what we need is to control the overall light emitted by the chip to ±40° or even smaller. This means that light with an angle greater than 40° or less and an angle less than -40° or less is wasted and not needed, and a large field of view will cause distortion caused by partial overlap of binocular viewing due to light divergence. Summary of the invention

[0003] In view of the deficiencies of the above-mentioned related technologies, the purpose of the present application is to provide a display backplane, panel, device, backlight module and manufacturing method to converge the light emitted by the light-emitting chip to avoid display distortion and light waste.

[0004] The present application also provides a display backplane, including a driving substrate and a plurality of light-emitting units arranged on the driving substrate, each of the light-emitting units including a lens and at least one light-emitting chip located in the lens, and the light emitted by the light-emitting chip is refracted by the lens and converges to a preset angle range.

[0005] The display backplane can converge the light emitted by the light-emitting chip by arranging a lens, thereby avoiding display distortion and light waste.

[0006] Optionally, the preset angle range is (-A°, +A°), where 0 <A≤40。

[0007] According to the needs of different AR products, select a suitable preset angle and converge the light emitted by the light-emitting chip within the preset angle range.

[0008] Optionally, the lens includes a first sub-lens and a second sub-lens, the first sub-lens and the second sub-lens are sequentially covered on the light-emitting chip, and the refractive index of the first sub-lens is greater than the refractive index of the second sub-lens and greater than the refractive index of air.

[0009] By respectively arranging the first sub-lens and the second sub-lens and reasonably selecting the refractive index, the light emitted by the light-emitting chip can be gradually converged into a preset angle range through the first sub-lens and the second sub-lens in sequence.

[0010] Optionally, the first sub-lenses are arranged in one-to-one correspondence with the light-emitting chips, and the second sub-lenses in each of the light-emitting units cover all the first sub-lenses in the corresponding light-emitting units.

[0011] By covering all the first sub-lenses in the corresponding light-emitting unit with the second sub-lens, the process can be simplified and the process difficulty can be reduced, thereby improving the production efficiency, especially when there are multiple first sub-lenses in the corresponding light-emitting unit.

[0012] Optionally, the first sub-lens and the second sub-lens are both semi-ellipsoidal.

[0013] Optionally, the number of light-emitting chips arranged in each lens is greater than or equal to 2 and less than or equal to 4.

[0014] By controlling the number of light-emitting chips in the lens to be greater than or equal to 2 and less than or equal to 4, the light convergence of the light-emitting chips can be better controlled to obtain better effects. The process can also be simplified and the process difficulty can be reduced, thereby improving production efficiency.

[0015] Optionally, a light shielding layer is provided around the light emitting chip. Since the chip is entirely luminous, a light shielding layer is provided to shield or absorb the light emitted from the side of the light emitting chip. The light shielding layer can also shield the large-angle light emitted from the side of the light emitting chip, so that the light convergence effect is better and the distortion is further reduced.

[0016] The present application also provides a display panel, comprising the above-mentioned display backplane.

[0017] The display panel can converge the light emitted by the light-emitting chip by providing a lens, thereby avoiding display distortion and light waste.

[0018] The present application also provides a backlight module, comprising the above-mentioned display backplane.

[0019] The backlight module can converge the light emitted by the light-emitting chip by arranging a lens, thereby avoiding display distortion and light waste.

[0020] The present application also provides a display device, comprising the above-mentioned backlight module.

[0021] The display device can converge the light emitted by the light-emitting chip by providing a lens, thereby avoiding display distortion and light waste.

[0022] The present application also provides a method for manufacturing a display backplane, which is used to manufacture the above-mentioned display backplane, comprising the following steps:

[0023] Providing a driving substrate provided with a light-emitting chip;

[0024] The drive substrate is provided with a lens on the light-emitting side of the light-emitting chip, and each lens covers at least one light-emitting chip, so as to converge the light emitted by the light-emitting chip into a preset angle range after being refracted by the lens.

[0025] By using the manufacturing method of the display backplane and providing a lens, the light emitted by the light-emitting chip can be converged to avoid display distortion and light waste.

[0026] Optionally, the pair of drive substrates are provided with lenses on the light-emitting side of the light-emitting chip, each lens covers at least one light-emitting chip, and specifically performs the following steps:

[0027] A first sub-lens is provided for each light-emitting chip on the driving substrate;

[0028] A second sub-lens is arranged on the first sub-lens, and the second sub-lens covers at least one of the first sub-lens; wherein the refractive index of the first sub-lens>the refractive index of the second sub-lens>the refractive index of air.

[0029] Through the above-mentioned manufacturing method of the display backplane, by sequentially arranging the first sub-lens and the second sub-lens and reasonably selecting the refractive index, the light emitted by the light-emitting chip can be gradually converged into a preset angle range through the first sub-lens and the second sub-lens in sequence. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a display backplane provided in an embodiment of the present application;

[0031] Figure 2 for Figure 1 Schematic diagram of light emission of the light emitting unit in FIG.

[0032] Figure 3 A flow chart of a method for manufacturing a display backplane provided in one embodiment of the present application;

[0033] Figure 4 A flow chart of a method for manufacturing a display backplane provided in another embodiment of the present application;

[0034] Figure 5 A schematic structural diagram of a method for manufacturing a display backplane provided in an embodiment of the present application.

[0035] Description of the reference numerals: 1-driving substrate; 2-light-emitting unit; 21-lens; 211-first sub-lens; 212-second sub-lens; 22-light-emitting chip; 3-light-shielding layer. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present application are given in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thoroughly and comprehensively understood.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0038] In the description of the present application, the terms "first", "second", etc. are used to distinguish different objects rather than to describe a specific order. In addition, the terms "upper", "lower", "inner", "outer", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present application.

[0039] It should be noted that the illustrations provided in the embodiments of the present application are only used to illustrate the basic concept of the present application in a schematic manner. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0040] The specific implementation of the present application is further described below in conjunction with the accompanying drawings.

[0041] See also Figure 1 and Figure 2 As shown, the embodiment of the present application discloses a display backplane, including a driving substrate 1 and a plurality of light-emitting units 2 arranged on the driving substrate 1, each of the light-emitting units 2 includes a lens 21 and at least one light-emitting chip 22 located in the lens 21, and the light emitted by the light-emitting chip 22 is refracted by the lens 21 and converged within a preset angle range. By setting the lens 21, the light emitted by the light-emitting chip can be converged to avoid display distortion and light waste.

[0042] In this embodiment, the preset angle range is (-A°, +A°), where 0 < A ≤ 40. According to the requirements of different AR products, an appropriate preset angle is selected, and the light emitted by the light-emitting chip is converged within the preset angle range. When used for AR display, the spacing between the chips is very small. Even if we converge the light within 40°, there will be no problem of uneven display. Even according to the requirements of the AR product, the light can be converged within 20°. In other embodiments, A is equal to 30 or 25 or 20 or 15 or 10 or other values, which can be specifically selected according to actual needs.

[0043] In this embodiment, the display backplane is a monochromatic display backplane, that is, the light-emitting chips 22 on the driving substrate 1 are monochromatic light-emitting chips, that is, the light-emitting colors of the light-emitting chips 22 on the driving substrate 1 are the same. Optionally, the light-emitting chip is blue or green or gray or other colors, which can be selected according to actual needs. In other embodiments, the display backplane is a full-color display backplane, that is, the light-emitting chips 22 on the driving substrate 1 at least include RGB three-color light-emitting chips. Optionally, the light-emitting unit 2 includes a red light-emitting chip, a green light-emitting chip, and a blue light-emitting chip. In other embodiments, the light-emitting unit 2 further includes one or more of a red light-emitting chip, a green light-emitting chip, a blue light-emitting chip, and a white light-emitting chip, which is not limited herein, and the colors of the light-emitting chips 22 in the light-emitting unit 2 can be selected according to actual needs.

[0044] In this embodiment, the lens 21 includes a first sub-lens 211 and a second sub-lens 212. The first sub-lens 211 and the second sub-lens 212 are sequentially covered on the light-emitting chip 22, and the refractive index of the first sub-lens 211 > the refractive index of the second sub-lens 212 > the refractive index of air. By respectively setting the first sub-lens 211 and the second sub-lens 212, and reasonably selecting the refractive index, the light emitted by the light-emitting chip 22 can be gradually converged within the preset angle range after passing through the first sub-lens 211 and the second sub-lens 212 in sequence.

[0045] In this embodiment, the refractive index of the first sub-lens 211 is 1.3 to 1.7, and the refractive index of the second sub-lens 212 is 1.3 to 1.65. Optionally, the refractive index of the first sub-lens 211 is 1.5, and the refractive index of the second sub-lens 212 is 1.41. In this way, the light emitted by the light-emitting chip 22 can be converged within (-40°, +40°) after being refracted by the lens 21, but it is not limited thereto, and can be selected according to specific requirements.

[0046] In this embodiment, the first sub-lenses 211 are arranged in one-to-one correspondence with the light-emitting chips 22, and the second sub-lenses 212 in each of the light-emitting units 2 cover all the first sub-lenses 211 in the corresponding light-emitting unit 2. By covering all the first sub-lenses 211 in the corresponding light-emitting unit 2 with the second sub-lenses 212, the process can be simplified and the process difficulty can be reduced, and the production efficiency can be improved, especially when there are multiple first sub-lenses 211 in the corresponding light-emitting unit 2.

[0047] In this embodiment, the first sub-lens 211 can be hemispherical, hemispherical, hemispherical or other shapes; the second sub-lens 212 can be hemispherical, hemispherical, hemispherical or other shapes. The hemispherical shape is that the original curved surface of the hemispherical shape is other special shapes, such as wavy or other shapes, which are not limited here. Optionally, both the first sub-lens 211 and the second sub-lens 212 are hemispherical.

[0048] In the present embodiment, the lens 21 is a transparent material to facilitate the emission of light. The material of the lens 21 can be epoxy resin or silicon dioxide or polymer material or silica gel or other substances. The polymer material includes polytetrafluoroethylene (PTFE), methyl methacrylate (PMMA), ethyl methacrylate (PEMA) and polycarbonate. Since the above-mentioned polymer materials have high permeability, the lens 21 made of these can reduce the absorption of light by the lens 21 itself, which is conducive to improving the intensity of the light emitted by the lens 21. The material of the first sub-lens 211 can be epoxy resin or silicon dioxide or polymer material or silica gel or other substances. The material of the second sub-lens 212 can be epoxy resin material or polymer material or silicon dioxide or silica gel or other substances. Optionally, the material of the first sub-lens 211 is epoxy resin, and the material of the second sub-lens 212 is silicon dioxide.

[0049] In this embodiment, the number of the light emitting chips 22 disposed in each of the lenses 21 is greater than or equal to 2 and less than or equal to 4. By controlling the number of the light emitting chips in the lens 21 to be greater than or equal to 2 and less than or equal to 4, the light convergence of the light emitting chips 22 can be better controlled to obtain better effects, and the process can be simplified and the process difficulty can be reduced, thereby improving production efficiency.

[0050] In this embodiment, a light shielding layer 3 is provided around the light emitting chip 22. Since the chip is entirely luminous, a light shielding layer is provided to shield or absorb the light emitted from the side of the light emitting chip 22. The light shielding layer 3 can also shield the large-angle light emitted from the side of the light emitting chip 22, so that the light convergence effect is better and the distortion is further reduced. Optionally, the light shielding layer 3 is provided on at least one side of the light emitting chip 22, which is not limited here and can be selected according to actual conditions.

[0051] The embodiment of the present application also discloses a display panel, including the display backplane. In this case, the display backplane is used for direct display, and the display panel is a direct display screen. The display panel can converge the light emitted by the light-emitting chip to avoid display distortion and light waste.

[0052] The embodiment of the present application also discloses a backlight module, including the display backplane. In this case, the display backplane is used for backlight. The backlight module can converge the light emitted by the light-emitting chip to avoid display distortion and light waste.

[0053] The embodiment of the present application also discloses a display device, including the backlight module. In other embodiments, the display device also includes a liquid crystal display panel, which is arranged on the light-emitting side of the backlight module. The display device can converge the light emitted by the light-emitting chip to avoid display distortion and light waste.

[0054] See also Figures 3 to 5 As shown, the embodiment of the present application also discloses a method for manufacturing a display backplane, which is used to manufacture the display backplane, comprising the following steps:

[0055] Providing a driving substrate 1 provided with a light emitting chip 22;

[0056] The drive substrate 1 is provided with a lens 21 on the light-emitting side of the light-emitting chip 22 , and each lens 21 covers at least one light-emitting chip 22 , so as to converge the light emitted by the light-emitting chip 22 into a preset angle range after being refracted by the lens 21 .

[0057] In this embodiment, the pair of drive substrates are provided with lenses 21 on the light-emitting side of the light-emitting chip 22, and each lens 21 covers at least one light-emitting chip 22. Specifically, the following steps are performed:

[0058] A first sub-lens 211 is provided for each light-emitting chip 22 on the driving substrate 1 . Specifically, a first sub-lens layer structure is manufactured, and the first sub-lens 211 is obtained by photoresist-assisted etching.

[0059] A second sub-lens 212 is disposed on the first sub-lens 211, and the second sub-lens 212 covers at least one first sub-lens 211; wherein the refractive index of the first sub-lens>the refractive index of the second sub-lens>the refractive index of air. Specifically, a second sub-lens layer structure is fabricated on the first sub-lens 211, and the second sub-lens 212 is obtained by etching with the aid of photoresist again.

[0060] In this embodiment, the driving substrate 1 can be a circuit board, an array substrate, a glass driving substrate, a flexible driving substrate, a light board, a semiconductor driving substrate or other types of driving substrates, which are not specifically limited in this embodiment; the material of the driving substrate 1 can be glass, transparent plastic, acrylic, quartz, sapphire, semiconductor material, etc., which can be selected according to actual conditions and is not specifically limited in this embodiment.

[0061] In this embodiment, the light emitting chip 22 may be a MiniLED or a MicroLED or a nano-LED or an LED of other sizes, which is not limited here and can be selected according to actual conditions.

[0062] Through the display backplane, panel, device, backlight module and manufacturing method of the present application, the light emitted by the light-emitting chip can be converged to avoid display distortion and light waste.

[0063] It should be understood that the application of the present application is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to this application.

Claims

1. A display backplane, characterized in that: It includes a driving substrate and a plurality of light-emitting units arranged on the driving substrate, each of the light-emitting units includes a lens and at least one light-emitting chip located in the lens, and the light emitted by the light-emitting chip is refracted by the lens and converges to a preset angle range.

2. The display backplane according to claim 1, characterized in that: The preset angle range is (-A°, +A°), where 0 <A≤40。 3. The display backplane according to claim 1 or 2, characterized in that: The lens includes a first sub-lens and a second sub-lens, the first sub-lens and the second sub-lens are sequentially covered on the light-emitting chip, and the refractive index of the first sub-lens>the refractive index of the second sub-lens>the refractive index of air.

4. The display backplane according to claim 3, characterized in that: The first sub-lenses are arranged in one-to-one correspondence with the light-emitting chips, and the second sub-lenses in each of the light-emitting units cover all the first sub-lenses in the corresponding light-emitting unit.

5. The display back panel according to claim 3, characterized in that: The first sub-lens and the second sub-lens are both semi-ellipsoidal.

6. The display back panel according to claim 1, 2, 4 or 5, characterized in that: The number of the light-emitting chips arranged in each lens is greater than or equal to 2 and less than or equal to 4.

7. The display back panel according to claim 1, 2, 4 or 5, characterized in that: A light shielding layer is arranged around the light emitting chip.

8. A display panel, characterized in that: Comprising the display back panel as claimed in any one of claims 1 to 7.

9. A backlight module, characterized in that: Comprising the display back panel as claimed in any one of claims 1 to 7.

10. A display device, characterized in that: Comprising the backlight module as claimed in claim 9.

11. A method for manufacturing a display backplane, characterized in that: The method for manufacturing a display backplane according to any one of claims 1 to 7 comprises the following steps: Providing a driving substrate provided with a light-emitting chip; A lens is arranged on the light emitting side of the light emitting chip of the driving substrate, and each of the lenses covers at least one of the light emitting chips, so as to converge the light emitted by the light emitting chip into a preset angle range after being refracted by the lens.

12. The method for manufacturing a display backplane according to claim 11, wherein: The pair of drive substrates are provided with lenses on the light-emitting side of the light-emitting chip, each of the lenses covers at least one of the light-emitting chips, and specifically performs the following steps: A first sub-lens is provided for each of the light-emitting chips on the driving substrate; A second sub-lens is arranged on the first sub-lens, and the second sub-lens covers at least one of the first sub-lens; wherein the refractive index of the first sub-lens>the refractive index of the second sub-lens>the refractive index of air.

Images