CN111413826A - Surface light source backlight device - Google Patents
Surface light source backlight device Download PDFInfo
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- CN111413826A CN111413826A CN202010257795.XA CN202010257795A CN111413826A CN 111413826 A CN111413826 A CN 111413826A CN 202010257795 A CN202010257795 A CN 202010257795A CN 111413826 A CN111413826 A CN 111413826A
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- light
- light guide
- backlight device
- chip
- light source
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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
-
- 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
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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 at least one light guide L ED lamp plate, wherein the light guide L ED lamp plates are positioned on the same plane, the adjacent light guide L ED lamp plates realize optical separation through a reflecting mechanism, the light guide L ED lamp plate comprises a light guide layer and an L ED chip array embedded in the light guide layer, wherein the light outlet surface of a L ED chip is vertical to the plane of a light guide L ED lamp plate, so that the light emitted by a L ED chip is mixed through the light guide layer and then is emitted out as a uniform surface light source.
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 main principle of the brightness enhancement film used in the direct backlight module with Mini-L ED is to converge a part of large-angle light to the central area, while the rest of light can re-enter the light guide plate through total reflection and be recycled, the light guide plate light return system different from the side-in backlight module with Mini-L has no light guide plate design, but the light return is performed by coating white reflective ink (white oil) on the driving substrate, because the reflective characteristic of the white oil makes the incident light have the same reflective characteristic as that of the incident light, the reflective characteristic of the incident light has the same reflective characteristic as that of the incident light, the reflective characteristic has the same reflective characteristic, the reflective characteristic has low yield, and the reflective characteristic is not easily recovered by the traditional backlight technology, such as the reflective loss of the white reflective ink (white oil) or the reflective loss of the white reflective ink (white oil) is reduced, the thickness of the liquid crystal display device is reduced, compared with the conventional side-in backlight module, the brightness enhancement film with the Mini-L ED.
Disclosure of Invention
The technical problem mainly solved by the invention is to provide a surface light source backlight device, which reduces the thickness of L ED backlight source modules, can realize uniform light output and HDR partition display by converting point light sources into surface light sources, can meet the requirements of backlight source brightness and uniformity under the condition of applying a small number of L ED lamps, and reduces the assembly cost of the backlight source modules.
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 at least one light guide L ED lamp panel, wherein the light guide L ED lamp panels are arranged from top to bottom, the adjacent light guide L ED lamp panels are optically separated through a reflecting mechanism, each light guide L ED lamp panel comprises a light guide layer and a L ED chip array embedded in the light guide layer, the light outlet surface of each L ED chip is perpendicular to the plane of the light guide L ED lamp panel, so that light emitted by the L ED chips is mixed through the light guide layer and then is emitted out through a uniform surface light source, and the reflecting mechanism enables the light outlet surfaces of the adjacent light guide L ED lamp panels not to be interfered with each other, so that HDR partition is realized.
The surface light source backlight device realizes adjustable light-equalizing effect and optical separation by embedding the L ED chips arranged on the light guide layer into the side faces and arranging the reflection mechanisms, improves the light-emitting uniformity of the surface light source, and can realize light guide and uniform light-emitting of the surface light source by emitting light to the light guide layer although the light emitted from each L ED chip has higher concentration degree.
In a preferred embodiment, the surface light source backlight device further includes an FPC driver board disposed below the light guide L ED 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 reflection structure is arranged at the bottom of the light guide L ED lamp panel, and a light emergent surface of the light guide L ED lamp panel is provided with a light emergent structure.
In a preferred embodiment, an optical adhesive is disposed between the L ED 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 L ED chip.
In a preferred embodiment, the light guiding layer is the same thickness as the L ED 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 L ED chip array comprises at least a red L ED chip, a blue L ED chip and a green L ED chip.
In a preferred embodiment, the L ED chip light emitting surface has a shape including at least one of a plane, a sphere, and a concave mirror.
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 invention, the backlight device of the surface light source of the invention is integrated with L CD panel and glass cover plate into an electronic device, which can be applied to L CD 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 of embodiment 1 of the present invention.
Fig. 2 is a sectional view of a surface light source backlight device of embodiment 1 of the present invention to show a general optical principle thereof.
Fig. 3 is a plan view of a light guide L ED lamp panel array of a surface light source backlight device in 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, with reference to fig. 1-2, a surface light source backlight device according to embodiment 1 of the present invention is described, where a technical solution adopted in this embodiment is to provide a surface light source backlight device, which includes an optical film group 101 and 7 × 7 light guide L ED lamp panels 102 arranged from top to bottom, where the light guide L ED lamp panels 102 are located on the same plane, adjacent light guide L ED lamp panels 102 are optically separated by a reflection mechanism 1011, the light guide L ED lamp panel 102 includes a light guide layer 1021 and a L ED chip 1022 array embedded in the light guide layer, and a light exit surface of the L ED chip is perpendicular to the plane of the light guide L ED lamp panel 102, so that light emitted from the L ED chip is mixed by the light guide layer and then exits with a uniform surface light source.
The surface light source backlight device realizes adjustable light equalizing effect and optical separation by embedding the L ED chips 1022 arranged on the light guide layer 1021 and the reflection mechanism 1011 at the side surface, and improves the light emitting uniformity of the surface light source, although the light emitted from each L ED chip 1022 has higher concentration, the light can be guided by emitting to the light guide layer 1021, and uniform light emitting of the surface light source is realized.
The surface light source backlight device further comprises an FPC (flexible printed circuit) driver board, the FPC driver board is arranged below the light guide L ED 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.
The bottom of the light guide L ED lamp panel 102 is provided with a reflection structure, the light emergent surface of the light guide L ED lamp panel 102 is provided with a light emergent structure, optical cement is arranged between the L ED 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 L ED chip 1022.
The light guiding layer 1021 and the L ED chip 1022 are the same thickness.
The light guide layer 1021 is made of a light guide plate material.
The L ED chip 1022 array includes red L ED chips, blue L ED chips, and green L ED chips.
The light emitting surface of the L ED chip is spherical.
The optical film group 101 includes a diffusion film, a structural film, and a prism sheet.
Example 2
Please refer to fig. 3, which is a plan view of a light guide L ED lamp panel array of a surface light source backlight device in embodiment 2 of the present invention, only the differences between embodiment 2 and embodiment 1 will be described below, and the details of the similarities will not be repeated here.
The light guide L ED lamp panel 102 is regular hexagon, so that the light of the L ED chips 1022 at the central point is more uniformly transmitted to the light guide layer 1021.
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 LED lamp comprises an optical film group and at least one light guide L ED lamp panel which are arranged from top to bottom;
the light guide L ED lamp panels are located on the same plane, and the adjacent light guide L ED lamp panels are optically separated through a reflecting mechanism;
leaded light L ED lamp plate includes leaded light layer, and
an L ED chip array embedded in the light guide layer;
the light emitting surface of the L ED chip is perpendicular to the plane of the light guide L ED lamp panel, so that the light emitted by the L ED chip is mixed by the light guide layer and then emitted out by a uniform surface light source.
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 L ED light panel, wherein the FPC driver board has a reflective layer disposed thereon.
3. The backlight device of claim 1, wherein a reflective structure is disposed at the bottom of the L ED lamp panel, and a light emergent structure is disposed at the light emergent surface of the L ED lamp panel.
4. The backlight device of claim 3, wherein an optical adhesive is disposed between the L ED chip and the light guide layer, and the optical adhesive is filled with diffusion particles.
5. The backlight device of the area light source as claimed in claim 4, wherein the light guide layer is provided with a light scattering structure corresponding to the light emitting surface of the L ED chip.
6. The backlight device of the area light source as claimed in claim 5, wherein the light guide layer has the same thickness as the L ED chips.
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 claim 1, wherein the L ED chip array comprises at least a red L ED chip, a blue L ED chip and a green L ED chip.
9. The backlight device of a surface light source as claimed in claim 1, wherein the L ED chips have a light emitting surface with a shape including 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 |
|---|---|---|---|
| CN202010257795.XA CN111413826A (en) | 2020-04-03 | 2020-04-03 | Surface light source backlight device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257795.XA CN111413826A (en) | 2020-04-03 | 2020-04-03 | Surface light source backlight device |
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| Publication Number | Publication Date |
|---|---|
| CN111413826A true CN111413826A (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010257795.XA Pending CN111413826A (en) | 2020-04-03 | 2020-04-03 | Surface light source backlight device |
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| 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 |
| CN108761910A (en) * | 2018-05-28 | 2018-11-06 | 京东方科技集团股份有限公司 | Electronic equipment, display device, backlight module and its light source |
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2020
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| KR100838332B1 (en) * | 2006-12-29 | 2008-06-13 | 김종균 | Back light unit for flat-panel display |
| CN102027396A (en) * | 2008-03-20 | 2011-04-20 | 纪尧姆·布莱 | Lighting module, in particular a backlighting module |
| JP2009244405A (en) * | 2008-03-28 | 2009-10-22 | Toppan Printing Co Ltd | Light diffusion unit, backlight unit, and display |
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| CN105090820A (en) * | 2015-07-27 | 2015-11-25 | 武汉华星光电技术有限公司 | Backlight source and display device |
| CN105278160A (en) * | 2015-10-29 | 2016-01-27 | 深圳市华星光电技术有限公司 | Backlight unit, backlight module and display device |
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| CN206489351U (en) * | 2017-02-20 | 2017-09-12 | 扬升照明股份有限公司 | Backlight module |
| CN108761910A (en) * | 2018-05-28 | 2018-11-06 | 京东方科技集团股份有限公司 | Electronic equipment, display device, backlight module and its light source |
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