CN110646983A - Backlight device of surface light source and display apparatus - Google Patents
Backlight device of surface light source and display apparatus Download PDFInfo
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- CN110646983A CN110646983A CN201910954343.4A CN201910954343A CN110646983A CN 110646983 A CN110646983 A CN 110646983A CN 201910954343 A CN201910954343 A CN 201910954343A CN 110646983 A CN110646983 A CN 110646983A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Abstract
The invention discloses a backlight device of a surface light source and a display device. The backlight device comprises a plurality of LED light sources, a substrate, a double-concave surface lens structure, an optical film group and a reflecting mechanism. The double-concave-surface lens structure and the substrate seal the LED light source and are used for carrying out light distribution on light emitted by the LED light source, two concave surfaces of the double-concave-surface lens structure are oppositely arranged, and one concave surface of the double-concave-surface lens structure covers the LED light source. An optical film group arranged above the biconcave lens structure; a substrate on which a plurality of LED light sources are mounted; and a reflection mechanism for reflecting a part of the light distribution of the biconcave lens structure to one side of the display surface of the backlight device, thereby improving the uniform light emission of the surface light source. The invention provides a backlight device for improving uniform light emission of a surface light source and improving the utilization efficiency of light.
Description
Technical Field
The present disclosure relates to display devices, and particularly to a backlight device and a display apparatus.
Background
The liquid crystal panel of the liquid crystal display device does not emit light by itself. Therefore, the liquid crystal display device is provided with a backlight device as a surface light source device as a light source for illuminating the liquid crystal panel on the back side of the liquid crystal panel.
As a configuration of such a backlight device, a direct type backlight device in which a plurality of Light Emitting diodes (hereinafter, referred to as "LED elements") are arranged is known.
In recent years, a small-sized LED element having high efficiency and high output has been developed. Therefore, even if the number of LED elements or LED BARs used in the backlight device is reduced, theoretically the same luminance as that of the conventional one can be obtained. In addition, the LED BAR is formed by arranging a plurality of LED elements to form 1 electronic component.
For example, patent documents 1 and 2 disclose the following techniques: in order to constitute a backlight device which is inexpensive and can obtain uniform luminance, light emitted from LED elements is diffused by cylindrical lenses.
Prior art patent document 1: japanese patent laid-open publication No. 2006-286608 patent document 2: however, in the techniques described in patent documents 1 and 2, when light is transmitted from a medium of a cylindrical lens into the air, reflected light is generated inside the cylindrical lens which is a boundary surface of the cylindrical lens. Further, the more the divergence angle of light from the LED element is enlarged, the more the reflected light increases. Therefore, it is difficult to improve uniformity of light irradiated in a planar manner. In particular, it is difficult to suppress a decrease in the light amount around the irradiation region.
Accordingly, an object of the present invention is to provide a technique capable of improving planar light uniformity.
Disclosure of Invention
The invention mainly solves the technical problem of providing a backlight device for improving the uniform light emission of a surface light source and improving the utilization efficiency of the light.
In order to solve the above technical problems, one technical solution of the present invention is a backlight device, which includes a plurality of LED light sources, a substrate, a bi-concave lens structure, an optical film set, and a reflection mechanism. The LED light source is sealed by the substrate, light distribution is carried out on light emitted by the LED light source, two concave surfaces of the biconcave lens structure are oppositely arranged, and one concave surface of the biconcave lens structure is arranged on one side of the LED light source. Preferably, the LED light source is wrapped by the biconcave lens structure and the substrate. An optical film group arranged above the biconcave lens structure; a substrate on which the plurality of LED light sources are mounted; and a reflection mechanism for reflecting a part of the light distribution of the biconcave lens structure to one side of the display surface of the backlight device, thereby improving the uniform light emission of the surface light source.
The backlight device of the present invention utilizes a biconcave lens structure to emit light emitted from an LED light source after the light is incident thereon, and functions as a condensing lens. Therefore, although the light emitted from each LED light source has a wide angular component (i.e., a large diffusion angle), the diffusion angle can be reduced by the light entering each biconcave lens structure. The arrangement of the reflecting mechanism further increases the light-emitting rate of light rays in the double-concave lens structure, and improves the utilization efficiency of light. The arrangement of the optical film group further optimizes the uniform light emission of the surface light source.
In a preferred embodiment, a plurality of the LED light sources are arranged in an array on the substrate, and the biconcave lens structure seals at least one of the LED light sources. The biconcave lens structures are distributed on one side of the substrate in a geometric shape, and the geometric shape comprises columns, circles or a matrix. The LED chip in the LED light source can be a mini-LED chip or a micro-LED chip.
Furthermore, a plurality of double concave lens structures are provided with a separation area therebetween. The reasonable partition region makes each the light-emitting of biconcave lens structure is more even, reduces light crosstalk between the biconcave lens structure, suppresses the light quantity decline and the halo phenomenon of illumination zone periphery.
In a preferred embodiment, the reflecting means is arranged in the separation region. The reflecting mechanism is reflective ink, a reflective film or a rubber frame with a reflecting function. The reflection mechanism or the separation area is provided with white or colorless stripes or dots for increasing the smooth transition of the light intensity between the light emitting centers of the LED light source.
In a preferred embodiment, the reflection mechanism covers the side surfaces of the biconcave lens structure except for the biconcave surface, so as to increase the light extraction utilization rate of the LED light source. The reflecting mechanism is reflective ink, a reflective film or a rubber frame with a reflecting function.
In a preferred embodiment, the optical film group comprises a diffusion film arranged above the biconcave lens structure, so that the light-emitting uniformity of a surface light source of the backlight device is further increased. The optical film group also comprises a prism sheet arranged above the diffusion film, and an optical filter arranged on the prism sheet, so that the display of RGB or RYB images by the backlight device is realized.
In a preferred embodiment, the optical film stack further comprises a quantum dot film.
In a preferred embodiment, a phosphor or quantum dot material is disposed within the LED light source.
According to an embodiment of the present invention, the backlight device of the present invention is used for a display apparatus which converts planar light source light emitted from the backlight device into image light.
Drawings
The invention and its advantages will be better understood by studying the following detailed description of specific embodiments, given by way of non-limiting example, and illustrated in the accompanying drawings, in which:
fig. 1 is a partial structural view of a backlight device of embodiment 1 of the present invention.
Fig. 2 is a structural view of an LED light source of the backlight device of embodiment 1 of the present invention.
Fig. 3 is a plan view of a backlight device of embodiment 1 of the present invention.
Fig. 4 is a partial structural view of a backlight device of embodiment 2 of the present invention.
Detailed Description
Referring to the drawings, wherein like reference numbers refer to like elements throughout, the principles of the present invention are illustrated in an appropriate environment. The following description is based on illustrated embodiments of the invention and should not be taken as limiting the invention with regard to other embodiments that are not detailed herein.
The word "embodiment" is used herein to mean serving as an example, instance, or illustration. In addition, the articles "a" and "an" as used in this specification and the appended claims may generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Further, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise direct contact of the first and second features through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Example 1
First, a backlight device according to embodiment 1 of the present invention will be described with reference to fig. 1 to 3. The backlight device of embodiment 1 of the present invention includes a substrate 101, a plurality of LED light sources 102, a bi-concave lens structure 103, an optical film set 104 and a reflection mechanism 105. And a substrate 101 on which the plurality of LED light sources 102 are mounted on the substrate 101. As shown in fig. 1, the LED light source 102 is sealed by a bi-concave lens structure 103 and a substrate 101, two concave surfaces 1031, 1032 of the bi-concave lens structure are oppositely disposed, and one concave surface 1031 of the bi-concave lens structure covers the LED light source for distributing light emitted from the LED light source 102. An optical film set 104 disposed over the biconcave lens structure 103. And a reflection mechanism 105 for reflecting a part of the light distribution of the biconcave lens structure 103 to one side of the display surface of the backlight device, thereby improving the uniform light emission of the surface light source. The backlight device further comprises a rubber frame 106, and the rubber frame is used for fixedly connecting the substrate 101, the biconcave lens structure 103 and the optical diaphragm group 104.
The backlight device of the present embodiment is configured and arranged in such a manner that the biconcave lens structure 103 is used to emit light after the light emitted from the LED light source 102 is incident thereon, and functions as a kind of condensing lens. Therefore, since the light emitted from each LED light source 102 enters the concave surface 1031 of each biconcave lens structure 103 and then exits from the concave surface 1032 although it has a wide angular component (i.e., a large diffusion angle), the diffusion angle can be reduced by entering each biconcave lens structure 103. The inside reflection groove that is provided with of biconcave lens structure 103 further regulates and control the angle of emergent light. The arrangement of the reflection mechanism 105 further increases the light-emitting rate of the light inside the biconcave lens structure 103, and improves the light utilization efficiency.
A plurality of the LED light sources 102 are arranged in an array on the substrate 101, and the biconcave lens structure 103 seals one of the LED light sources 102. The concave lens structures are distributed on one side of the substrate 101 in a matrix. The LED light emitting diodes in the LED light source 102 are mini-LED chips.
As shown in fig. 3, a plurality of the biconcave lens structures 103 are provided with a separation region 201 therebetween. The reasonably arranged separation areas enable the light emitting of the biconcave lens structures 103 to be more uniform, light crosstalk between the biconcave lens structures 103 is reduced, and light quantity reduction and halo phenomena around the irradiation areas are suppressed. The reflecting means 105 is disposed in the divided region. The reflective mechanism 105 is a reflective ink.
The reflecting mechanism 105 covers the side surfaces of the biconcave lens structure 103 except for the biconcave surface, so as to increase the light-emitting utilization rate of the LED light source 102.
The optical film set 104 includes a diffusion film disposed above the biconcave lens structure 103, so as to further increase the uniformity of the light emitted from the surface light source of the backlight device. The optical film set 104 further includes a prism sheet disposed above the diffusion film, and an optical filter disposed on the prism sheet, so as to realize display of RGB images by the backlight device.
The optical film set 104 further includes a quantum dot film disposed between the prism sheet and the optical filter, so as to further optimize the display quality of the backlight device and expand the display color gamut.
Example 2
Fig. 4 is a partial structural view of a backlight device according to embodiment 2 of the present invention. Only the differences between embodiment 2 and embodiment 1 will be described below, and the descriptions of the similarities will be omitted.
The separating region 201 is a part of the rubber frame 106, and the separating region 201 with the protruding structure and the rubber frame 106 are integrally formed. The physical segmentation effect of the partition area 201 with the convex structure on the biconcave lens structure 103 is better, and the partition area 201 is a rubber frame component with a reflection function, so that the light emitting of each biconcave lens structure 103 is more uniform, the light crosstalk between the biconcave lens structures 103 is reduced, and the light quantity reduction and halo phenomenon at the periphery of an irradiation area are inhibited. On the other hand, the integrally formed rubber frame is convenient for production and assembly of the backlight device.
While the invention has been described above with reference to certain embodiments, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the various features of the various embodiments of the present disclosure may be used in any combination, provided that there is no structural conflict, and the combination is not exhaustively described in this specification for brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A backlight apparatus, comprising:
a plurality of LED light sources;
a substrate on which the plurality of LED light sources are mounted;
the biconcave lens structure is used for distributing light of the LED light source;
an optical film group arranged above the biconcave lens structure;
a reflection mechanism that reflects a part of the light distribution of the biconcave lens structure to one side of a display surface of the backlight device;
the two concave surfaces of the double-concave lens structure are oppositely arranged, and one concave surface of the double-concave lens structure is arranged on the light emitting side of the LED light source.
2. The backlight device according to claim 1, wherein: the LED light sources are arranged on the substrate in an array mode, and the double-concave-surface lens structure seals at least one LED light source.
3. The backlight device according to claim 2, wherein: and a separation region is arranged between a plurality of the biconcave lens structures.
4. The backlight device according to claim 3, wherein: the reflecting mechanism is arranged in the separation area.
5. The backlight device according to claim 1, wherein: the reflecting mechanism coats the side faces of the double-concave-surface lens structure except the double concave surfaces so as to increase the light-emitting utilization rate of the LED light source.
6. A backlight device as claimed in any one of claims 4 to 5, characterized in that: the reflecting mechanism is reflective ink, a reflective film or a rubber frame with a reflecting function.
7. The backlight device according to claim 1, wherein: the optical film group comprises a diffusion film arranged above the biconcave lens structure.
8. The backlight device according to claim 1, wherein: the optical film group also comprises a prism sheet arranged above the diffusion film and an optical filter arranged on the prism sheet.
9. The backlight device according to claim 1, wherein: the optical film set also comprises a quantum dot film; or fluorescent powder or quantum dot materials are arranged in the LED light source.
10. A display device comprising a backlight as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910954343.4A CN110646983A (en) | 2019-10-09 | 2019-10-09 | Backlight device of surface light source and display apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910954343.4A CN110646983A (en) | 2019-10-09 | 2019-10-09 | Backlight device of surface light source and display apparatus |
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| CN110646983A true CN110646983A (en) | 2020-01-03 |
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| CN201910954343.4A Pending CN110646983A (en) | 2019-10-09 | 2019-10-09 | Backlight device of surface light source and display apparatus |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112164323A (en) * | 2020-08-28 | 2021-01-01 | 福州大学 | Mu LED backlight source for mixing light by utilizing double-concave diffusion unit structure and manufacturing method thereof |
| CN113917733A (en) * | 2021-04-19 | 2022-01-11 | 北京显芯科技有限公司 | Mini-LED backlight display screen |
| WO2023092438A1 (en) * | 2021-11-26 | 2023-06-01 | Hefei Raysees Ai Technology Co., Ltd. | Backlight module and display device |
| US20230305332A1 (en) * | 2020-11-30 | 2023-09-28 | Huawei Technologies Co, Ltd. | Backlight Module and Display Screen |
| WO2024015767A1 (en) * | 2022-07-12 | 2024-01-18 | Muth Mirror Systems, Llc | Reflecting optic assembly |
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Application publication date: 20200103 |