CN111323967A - Surface light source backlight device - Google Patents
Surface light source backlight device Download PDFInfo
- Publication number
- CN111323967A CN111323967A CN202010257848.8A CN202010257848A CN111323967A CN 111323967 A CN111323967 A CN 111323967A CN 202010257848 A CN202010257848 A CN 202010257848A CN 111323967 A CN111323967 A CN 111323967A
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- Prior art keywords
- light
- light guide
- light source
- led chip
- backlight device
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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
- G02F1/133606—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
- G02F1/133603—Direct backlight with LEDs
-
- 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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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a surface light source backlight device, which comprises an optical film group and a light guide LED lamp panel which are arranged from top to bottom; the light guide LED lamp panel comprises a light guide layer and an LED chip array embedded in the light guide layer; the light emitting surface of the LED chip is perpendicular to the plane of the light guide LED lamp panel, so that the light emitted by the LED chip is emitted out through the uniform surface light source after being mixed by the light guide layer. The invention reduces the thickness of the LED backlight source module; and by converting the point light source into the surface light source, the requirements on the brightness and uniformity of the backlight source can be met under the condition of using a small number of LED lamps, and the assembly cost of the backlight source module is reduced.
Description
Technical Field
The present invention relates to a display device, and more particularly, to a surface light source backlight device.
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.
The direct type backlight module is directly arranged behind the liquid crystal display panel, has the advantage of a narrow frame, is widely applied to the field of large-size display, and faces the problem of thickness increase. A Mini light emitting diode (Mini-LED) is a small LED having a size of about 100 μm, and when the Mini-LED is applied to a backlight unit, it is possible to reduce the increase in thickness of a liquid crystal display device while realizing a narrow bezel. Similar to the conventional side-in backlight module, the vertical backlight module using Mini-LEDs also needs to use a brightness enhancement film, a reflector plate, etc. to improve the front brightness. The basic principle of the most commonly used brightness enhancement film is that part of the light with large angle can be converged to the central region, and the rest of the light can re-enter the light guide plate through total reflection and be recycled. Different from a light guide plate light returning system of a side-in type backlight, a vertical backlight module of a Mini-LED is designed without a light guide plate, but light returning is carried out by coating white light reflecting ink (namely white oil) on a driving substrate, and due to the reflection characteristic of the white oil, the reflected light and incident light generally have the same angle, or the reflected light enters a brightness enhancement film again after being reflected and is totally reflected back, or the reflected light is reflected to a low reflection area (such as the surface of the Mini-LED and a spacer area between the Mini-LED and the white oil) of the driving substrate and is lost, so that the whole light returning efficiency is greatly lost, and the light emitting efficiency is not high. The Mini-LED backlight technology is difficult to implement, is disjointed from the traditional backlight technology on one hand, and has high manufacturing cost and low yield on the other hand.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a surface light source backlight device, which reduces the thickness of an LED backlight module, can realize uniform light emission by converting a point light source into a surface light source, can meet the requirements of backlight brightness and uniformity under the condition of applying a small number of LED lamps, and reduces the assembly cost of the backlight module.
In order to solve the technical problems, one technical scheme adopted by the invention is to provide a surface light source backlight device, which comprises an optical film group and a light guide LED lamp panel which are arranged from top to bottom; the light guide LED lamp panel comprises a light guide layer and an LED chip array embedded in the light guide layer; the light emitting surface of the LED chip is perpendicular to the plane of the light guide LED lamp panel, so that the light emitted by the LED chip is emitted out through the uniform surface light source after being mixed by the light guide layer.
According to the surface light source backlight device, the LED chips embedded into the light guide layer from the side face are arranged, so that the light homogenizing effect is adjustable, and the light emitting uniformity of the surface light source is improved. Although the light emitted from each LED chip has a high concentration degree, the light is emitted to the light guide layer, so that light can be guided, and uniform surface light source light emission can be realized. The invention can obtain the high HDR contrast value display picture of the terminal equipment at the same time. In addition, the production, assembly process and structure of the whole backlight module are simpler, and the structural stability is high.
In a preferred embodiment, the surface light source backlight device further includes an FPC driver board disposed below the light-guiding LED lamp panel, and the FPC driver board is provided with a reflective layer for reflecting toward a light exit surface of the surface light source backlight device.
In a preferred embodiment, a reflecting structure is arranged at the bottom of the light guide LED lamp panel; the light-emitting surface of the light guide LED lamp panel is provided with a light-emitting structure.
In a preferred embodiment, an optical adhesive is disposed between the LED chip and the light guide layer, and diffusion particles are disposed in the optical adhesive.
In a preferred embodiment, the light guide layer is provided with a light scattering structure, and the light scattering structure corresponds to the light emitting surface of the LED chip.
In a preferred embodiment, the light guiding layer is the same thickness as the LED chip.
In a preferred embodiment, the light guide layer includes at least one of a light guide plate, a quantum dot film, an optical glue layer, and a diffusion film.
In a preferred embodiment, the LED chip array comprises at least a red LED chip, a blue LED chip and a green LED chip.
In a preferred embodiment, the shape of the light emitting surface of the LED chip includes at least one of a plane, a sphere, and a concave mirror surface.
In a preferred embodiment, the optical film group includes a diffusion film, a structural film, and a prism sheet.
According to the embodiment of the present invention, the backlight device of the surface light source of the present invention is integrated with an LCD panel and a glass cover plate into an electronic apparatus, which can be applied to an LCD display.
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 an exploded view of a surface light source backlight device according to an embodiment of the present invention.
Fig. 2 is a sectional view of a surface light source backlight device of an embodiment of the present invention to illustrate a general optical principle thereof.
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.
First, a surface light source backlight device according to an embodiment of the present invention will be described with reference to fig. 1 to 2. One technical solution adopted in this embodiment is to provide a surface light source backlight device, which includes an optical film group 101 and a light guide LED lamp panel 102 arranged from top to bottom; the light guide LED lamp panel 102 comprises a light guide layer 1021 and an array of LED chips 1022 embedded in the light guide layer 1021; the light emitting surface of the LED chip 1022 is perpendicular to the plane of the light guide LED lamp panel 102, so that the light emitted from the LED chip 1022 is mixed by the light guide layer 1021 and then emitted from a uniform surface light source.
The surface light source backlight device of this embodiment sets up in through the side embedding the setting of the LED chip 1022 of leaded light layer 1021, it is adjustable to realize the even light effect, has promoted the surface light source light-emitting degree of consistency. Although the light emitted from each LED chip 1022 has a high concentration, the light is emitted to the light guide layer 1021, whereby light can be guided, and uniform surface light source light emission can be realized. The invention can obtain the high HDR contrast value display picture of the terminal equipment at the same time. In addition, the production, assembly process and structure of the whole backlight module are simpler, and the structural stability is high. The design of the light guide LED lamp panel 102 reduces the thickness of the LED backlight module, and by converting a point light source into a surface light source, uniform light emission can be achieved, and the requirements for backlight brightness and uniformity can be met under the condition of using a small number of LED lamps, thereby reducing the assembly cost of the backlight module.
The surface light source backlight device further comprises an FPC (flexible printed circuit) driver board which is arranged below the light guide LED lamp panel 102, and a reflecting layer is arranged on the FPC driver board and used for reflecting light to a light emergent surface of the surface light source backlight device.
A reflecting structure is arranged at the bottom of the light guide LED lamp panel 102; the light emitting surface of the light guide LED lamp panel 102 is provided with a light emitting structure. Optical cement is arranged between the LED chip 1022 and the light guide layer 1021, and diffusion particles are arranged in the optical cement.
The light guide layer 1021 is provided with a sawtooth-structure-shaped light scattering structure, and the light scattering structure corresponds to the light emitting surface of the LED chip 1022.
The light guide layer 1021 and the LED chip 1022 have the same thickness.
The light guide layer 1021 is made of a light guide plate material.
The array of LED chips 1022 includes red LED chips, blue LED chips, and green LED chips.
The shape of the light emitting surface of the LED chip is a spherical surface.
The optical film group comprises a diffusion film, a structural film and a prism sheet.
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 surface light source backlight device, comprising:
the optical film group and the light guide LED lamp panel are arranged from top to bottom;
wherein, leaded light LED lamp plate includes leaded light layer to and
the LED chip array is embedded in the light guide layer;
the light emitting surface of the LED chip is perpendicular to the plane of the light guide LED lamp panel, so that the light emitted by the LED chip is emitted out through the uniform surface light source after being mixed by the light guide layer.
2. The backlight device for a surface light source as claimed in claim 1, further comprising an FPC driver board disposed under the light guide LED lamp panel, the FPC driver board having a reflective layer disposed thereon.
3. The backlight device of the area light source as claimed in claim 1, wherein a reflective structure is provided at the bottom of the light guide LED lamp panel; the light-emitting surface of the light guide LED lamp panel is provided with a light-emitting structure.
4. The backlight device of claim 3, wherein an optical paste is disposed between the LED chip and the light guide layer, and the optical paste has diffusion particles disposed therein.
5. The backlight device of a surface light source as claimed in claim 4, wherein the light guide layer is provided with a light diffusion structure corresponding to the light emitting surface of the LED chip.
6. The backlight device of a surface light source as claimed in claim 5, wherein the light guide layer has the same thickness as the LED chip.
7. The backlight device of a surface light source as claimed in claim 6, wherein the light guide layer comprises at least one of a light guide plate, a quantum dot film, an optical glue layer and a diffusion film.
8. The backlight device of a surface light source as claimed in claim 1, wherein the LED chip array includes at least a red LED chip, a blue LED chip and a green LED chip.
9. The backlight device of a surface light source as claimed in claim 1, wherein the shape of the light emitting surface of the LED chip includes at least one of a plane, a spherical surface, and a concave mirror surface.
10. The backlight device of a surface light source as claimed in claim 1, wherein the optical film group comprises a diffusion film, a structural film and a prism sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257848.8A CN111323967A (en) | 2020-04-03 | 2020-04-03 | Surface light source backlight device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257848.8A CN111323967A (en) | 2020-04-03 | 2020-04-03 | Surface light source backlight device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111323967A true CN111323967A (en) | 2020-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010257848.8A Pending CN111323967A (en) | 2020-04-03 | 2020-04-03 | Surface light source backlight device |
Country Status (1)
| Country | Link |
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| CN (1) | CN111323967A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200825553A (en) * | 2006-12-06 | 2008-06-16 | Au Optronics Corp | Backlight module |
| CN201439903U (en) * | 2009-08-07 | 2010-04-21 | 北京京东方光电科技有限公司 | Direct-type backlight source module |
| CN102483215A (en) * | 2009-05-06 | 2012-05-30 | I2Ic公司 | Light guide with embedded light sources |
| CN206573819U (en) * | 2017-02-16 | 2017-10-20 | 广州毅昌科技股份有限公司 | A kind of ultra-thin down straight aphototropism mode set |
-
2020
- 2020-04-03 CN CN202010257848.8A patent/CN111323967A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200825553A (en) * | 2006-12-06 | 2008-06-16 | Au Optronics Corp | Backlight module |
| CN102483215A (en) * | 2009-05-06 | 2012-05-30 | I2Ic公司 | Light guide with embedded light sources |
| CN201439903U (en) * | 2009-08-07 | 2010-04-21 | 北京京东方光电科技有限公司 | Direct-type backlight source module |
| CN206573819U (en) * | 2017-02-16 | 2017-10-20 | 广州毅昌科技股份有限公司 | A kind of ultra-thin down straight aphototropism mode set |
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Application publication date: 20200623 |