CN104776363A - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
- Publication number
- CN104776363A CN104776363A CN201510208458.0A CN201510208458A CN104776363A CN 104776363 A CN104776363 A CN 104776363A CN 201510208458 A CN201510208458 A CN 201510208458A CN 104776363 A CN104776363 A CN 104776363A
- Authority
- CN
- China
- Prior art keywords
- light
- guide plate
- light guide
- backlight module
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
-
- 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
- G02F1/133606—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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (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 backlight module and a display device. The back light module comprises a light guide plate, a light source and a reflecting device, wherein a light emergent surface of the reflecting device is opposite to a light incident surface of the light guide plate, the light incident surface of the reflecting device is opposite to the light source, and is used for reflecting light rays emitted out from the light source into the light incident surface of the light guide plate, and the light source emits out light rays in the thickness direction of the light guide plate. The back light module changes the light incident mode of the light source through the reflecting device, light rays emitted out from the light source are reflected into the light incident surface of the light guide plate, so that the light mixing distance of an effective display region between the luminous surface of a luminous element and the light guide plate is increased, the light rays emitted by the luminous surface of the luminous element can be subjected to uniform light mixing before entering the effective display region, and the display effect of the display panel is improved.
Description
Technical field
The present invention relates to Display Technique field, be specifically related to a kind of backlight module and display unit.
Background technology
Liquid crystal indicator (Liquid Crystal Display is called for short LCD) has become the main product in current panel display apparatus because of features such as its volume are little, low in energy consumption, radiationless.Backlight is requisite device in liquid crystal indicator, and backlight is used for when showing for light guide plate provides backlight.In order to adapt to display floater to more frivolous future development, backlight adopts side entering type usually, as shown in Figure 1, light source 4 is normally arranged on the edge of the side of light guide plate 3 by side-edge type backlight, the light that light source 4 is sent incides in the territory, effective display area 7 of light guide plate 3 from the marginal end of light guide plate 3, wherein light source generally adopts LED lamp bar 2, and LED lamp bar is arranged multiple LED 1, multiple LED arranges each other at equal intervals along the bearing of trend of lamp bar.
As shown in Figure 2, because the light range of exposures of each LED 1 is about a sector region, light luminance in this sector region is higher, so this sector region defines the light clear zone 11 of whole LED lamp bar, and interval region light luminance between spaced two LED 1 is lower, so the interval region between two LED 1 is easy to form light dark space 12, when in the liquid crystal indicator at narrow frame LED light-emitting area distance light guide plate territory, effective display area distance inadequate LED 1 mixed light required for distance time, can cause display floater occurring firefly Hotspot phenomenon (display floater occurring light and dark multiple points), have a strong impact on the display effect of display floater.
Summary of the invention
For defect of the prior art, the invention provides a kind of backlight module and display unit, avoid when ultra-narrow edge frame product designs, when territory, effective display area due to the light-emitting area distance light guide plate of light-emitting component is nearer, there is the phenomenon of bright dark inequality in display floater, improves the display effect of display floater.
First aspect, the invention provides a kind of backlight module, comprise: light guide plate and light source, also comprise: reflection unit, the exiting surface of described reflection unit is relative with the incidence surface of described light guide plate, the incidence surface of described reflection unit is relative with described light source, for the light reflection from described light source outgoing being entered the incidence surface of described light guide plate;
Wherein, described light source is at the thickness direction emergent ray of described light guide plate.
Optionally, described reflection unit comprises reflecting surface, and the angle of the thickness direction of described reflecting surface and described light guide plate is acute angle.
Optionally, described reflection unit and described light guide plate one-body molded.
Optionally, described reflection unit is prism.
Optionally, the cross section of described prism is right angled triangle, and the first right-angle side corresponds to the incidence surface of described light guide plate, and the second right-angle side corresponds to the exiting surface of described light guide plate, and hypotenuse corresponds to the reflecting surface of described light guide plate.
Optionally, the length of described first right-angle side is less than or equal to the thickness of described light guide plate.
Optionally, the length of described second right-angle side is more than or equal to the width of the exiting surface of described light source.
Optionally, also comprise backboard, described backboard comprises depressed part, and described light source is arranged on described depressed part.
Optionally, described light source multiple light-emitting components of comprising lamp bar and arranging at equal intervals each other along the bearing of trend of described lamp bar.
Second aspect, present invention also offers a kind of display unit, comprises above-mentioned backlight module.
As shown from the above technical solution, a kind of backlight module provided by the invention and display unit, the light inlet mode of the light-emitting component of light source is changed by reflection unit, the light reflection of light-emitting component outgoing is entered the incidence surface of light guide plate, thus the light-emitting area adding light-emitting component to light guide plate territory, effective display area between light mixing distance, the light that the exiting surface of light-emitting component is sent is uniform mixed light before entering the territory, effective display area of display floater, improves the display effect of display floater.
In description of the present invention, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme, it all should be encompassed in the middle of the scope of claim of the present invention and description.
Accompanying drawing explanation
Fig. 1 is the structural representation of backlight module in prior art;
Fig. 2 is that the light of LED lamp bar in prior art irradiates schematic diagram;
The structural representation of the backlight module that Fig. 3 provides for one embodiment of the invention;
The structural representation of the backlight module that Fig. 4 provides for another embodiment of the present invention;
Wherein description of reference numerals:
1, light-emitting component; 2, lamp bar; 3, light guide plate; 4, light source; 5, reflection unit; 6, backboard; 7, territory, effective display area; 11, light clear zone; 12 light dark spaces.
Detailed description of the invention
Below in conjunction with accompanying drawing, the detailed description of the invention of invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Fig. 3 shows the structural representation of the backlight module that the embodiment of the present invention provides, as shown in Figure 3, this backlight module comprises: light guide plate 3, light source 4 and reflection unit 5, the exiting surface of reflection unit 5 is relative with the incidence surface of light guide plate 3, the incidence surface of reflection unit 5 is relative with light source 4, for the light reflection from light source 4 outgoing being entered the incidence surface of described light guide plate 3; Wherein, light source 4 is at the thickness direction emergent ray of light guide plate 3.
Concrete, multiple light-emitting components 1 (arrangement mode and Fig. 2 similar) that above-mentioned light source 4 specifically comprises lamp bar 2 and arranges at equal intervals each other along the bearing of trend of described lamp bar 2, wherein lamp bar 2 lies in a horizontal plane in the depressed part of backboard 6.
Above-mentioned backlight module changes the light inlet mode of light-emitting component by reflection unit 5, the light reflection of light-emitting component 1 outgoing in light source 4 is entered the incidence surface of light guide plate 3, thus the light-emitting area adding light-emitting component 1 to light guide plate territory, effective display area 7 between light mixing distance, the light that the exiting surface of light-emitting component 1 is sent is uniform mixed light before entering the territory, effective display area 7 of light guide plate 3, improves the display effect of display floater.
In a particular application, above-mentioned backlight module can be avoided when ultra-narrow edge frame product designs by following two kinds of structures, and when the light-emitting area distance territory, light guide plate effective display area due to light-emitting component 1 is nearer, the phenomenon of bright dark inequality appears in display floater.
Fig. 3 shows the structural representation of a kind of backlight module that the embodiment of the present invention provides, wherein, reflection unit 5 is one-body molded with light guide plate 3, namely light guide plate 3 comprises a triangle light guide structure at the incidence surface place of light-emitting component 1, wherein, reflection unit 5 comprises reflecting surface, the angle of the reflecting surface of reflection unit 5 and the thickness direction of light guide plate 3 is acute angle, in order to the light that light-emitting component 1 sends all can being reflected, therefore this reflecting surface is identical with the thickness of light guide plate 3 in the face width of the projection in the direction parallel with the thickness direction of light guide plate 3, the width of the exiting surface of light-emitting component is more than or equal in the face width of the projection in the direction vertical with the thickness direction of light guide plate 3.Thus decrease the loss of light, improve the utilization rate of light.
Reflection unit 5 in said structure is one-body molded with light guide plate 3, reduces the manufacturing process of this backlight module.
In the attainable mode of another kind, reflection unit 5 and light guide plate 3 are not structure as a whole, as shown in Figure 4, this reflection unit 5 is prism, the cross section of this concrete prism is right angled triangle, first right-angle side corresponds to the incidence surface of light guide plate 3, and the second right-angle side corresponds to the exiting surface of light guide plate 3, and hypotenuse corresponds to the reflecting surface of light guide plate 3.In order to the light that LED 1 sends all can being reflected, the length of the first right-angle side is less than or equal to the thickness of light guide plate 3, and the length of the second right-angle side is more than or equal to the width of the exiting surface of institute's light source.Decrease the loss of light, improve the utilization rate of light.
Adopt above-mentioned two kinds of structures, as shown in Figure 3 and Figure 4, the light-emitting area of light-emitting component 1 to the light mixing distance in territory, light guide plate 3 effective display area 7 is that the light-emitting area of light-emitting component 1 is to the distance a of the reflecting surface of reflection unit 5 and reflecting surface to the distance b sum in territory, light guide plate 3 effective display area 7 and a+b, and adopt the light mixing distance between the light-emitting area of light-emitting component 1 in Fig. 1 structure to territory, light guide plate effective display area to be b, therefore, adopt the structure of above-mentioned backlight module, the light mixing distance between the light-emitting area adding light-emitting component 1 to territory, light guide plate 3 effective display area 7.Make light can uniform mixed light before entering effective viewing area 7, no longer occur firefly phenomenon, thus improve backlight effect.
In the structure of above-mentioned two kinds of backlight modules, the light reflection of light source 4 outgoing is entered the incidence surface of light guide plate 3 by the reflecting surface of reflection unit 5, light mixing distance between the light-emitting area adding light-emitting component 1 to territory, light guide plate effective display area, make light can uniform mixed light before the territory, effective display area entering light guide plate, eliminate phenomenon and Hotspot firefly phenomenon that bright dark inequality appears in display floater, and then improve the display effect of display floater.
It should be noted that, the light-emitting component 1 in above-mentioned light source can be other the light-emitting component such as LED, fluorescent lamp or incandescent lamp.
Present invention also offers a kind of display unit, comprise backlight module as described above.
Display unit in the present embodiment can be: any product or parts with Presentation Function such as e-book, mobile phone, panel computer, television set, notebook computer, DPF, navigator.
Claims (10)
1. a backlight module, comprise: light guide plate and light source, it is characterized in that, also comprise: reflection unit, the exiting surface of described reflection unit is relative with the incidence surface of described light guide plate, the incidence surface of described reflection unit is relative with described light source, for the light reflection from described light source outgoing being entered the incidence surface of described light guide plate;
Wherein, described light source is at the thickness direction emergent ray of described light guide plate.
2. backlight module according to claim 1, is characterized in that, described reflection unit comprises reflecting surface, and the angle of the thickness direction of described reflecting surface and described light guide plate is acute angle.
3. backlight module according to claim 2, is characterized in that, described reflection unit and described light guide plate one-body molded.
4. backlight module according to claim 2, is characterized in that, described reflection unit is prism.
5. backlight module according to claim 4, it is characterized in that, the cross section of described prism is right angled triangle, and the first right-angle side corresponds to the incidence surface of described light guide plate, second right-angle side corresponds to the exiting surface of described light guide plate, and hypotenuse corresponds to the reflecting surface of described light guide plate.
6. backlight module according to claim 5, is characterized in that, the length of described first right-angle side is less than or equal to the thickness of described light guide plate.
7. backlight module according to claim 5, is characterized in that, the length of described second right-angle side is more than or equal to the width of the exiting surface of described light source.
8. backlight module according to claim 1, is characterized in that, also comprises backboard, and described backboard comprises depressed part, and described light source is arranged on described depressed part.
9., according to the backlight module of claim 1-8 according to any one of it, it is characterized in that, multiple light-emitting components that described light source comprises lamp bar and arranges at equal intervals each other along the bearing of trend of described lamp bar.
10. a display unit, is characterized in that, comprises backlight module as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510208458.0A CN104776363A (en) | 2015-04-28 | 2015-04-28 | Backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510208458.0A CN104776363A (en) | 2015-04-28 | 2015-04-28 | Backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104776363A true CN104776363A (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510208458.0A Pending CN104776363A (en) | 2015-04-28 | 2015-04-28 | Backlight module and display device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772771A (en) * | 2017-01-03 | 2017-05-31 | 合肥鑫晟光电科技有限公司 | Light guide plate, backlight module and display device |
| CN106950749A (en) * | 2015-12-31 | 2017-07-14 | 乐金显示有限公司 | Back light unit and display device |
| CN107505671A (en) * | 2017-09-25 | 2017-12-22 | 京东方科技集团股份有限公司 | Backlight module, its preparation method and include its display device |
| CN108303828A (en) * | 2018-03-22 | 2018-07-20 | 东莞市元立电子科技有限公司 | A kind of LCD backlight with plate for high luminance light guide structure |
| CN108681188A (en) * | 2018-07-02 | 2018-10-19 | 肯维捷斯（武汉）科技有限公司 | A kind of portable imaging module |
| CN110568942A (en) * | 2019-05-02 | 2019-12-13 | 义隆电子股份有限公司 | Light-emitting touch panel |
| CN111399302A (en) * | 2018-12-13 | 2020-07-10 | 大众汽车有限公司 | Display device for a means of transportation |
| CN111679506A (en) * | 2020-06-29 | 2020-09-18 | 维沃移动通信有限公司 | Backlight module and electronic equipment |
| WO2020220167A1 (en) * | 2019-04-28 | 2020-11-05 | 深圳市汇顶科技股份有限公司 | Backlight module and display apparatus |
| CN113253518A (en) * | 2021-05-18 | 2021-08-13 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN114077093A (en) * | 2020-08-13 | 2022-02-22 | 京东方科技集团股份有限公司 | Side-in light source, backlight module and display device |
| WO2023108510A1 (en) * | 2021-12-13 | 2023-06-22 | 武汉华星光电技术有限公司 | Backlight module and display panel |
| US11982829B2 (en) | 2021-12-13 | 2024-05-14 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Backlight module and display panel |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950749A (en) * | 2015-12-31 | 2017-07-14 | 乐金显示有限公司 | Back light unit and display device |
| CN106772771A (en) * | 2017-01-03 | 2017-05-31 | 合肥鑫晟光电科技有限公司 | Light guide plate, backlight module and display device |
| WO2018126705A1 (en) * | 2017-01-03 | 2018-07-12 | 京东方科技集团股份有限公司 | Light guide plate, backlight module and display device |
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| US11340393B2 (en) | 2017-09-25 | 2022-05-24 | Fuzhou Boe Optoelectronics Technology Co., Ltd. | Backlight module including side surface having acute angle manufacturing method thereof and display device and illuminating device comprising the same |
| CN108303828A (en) * | 2018-03-22 | 2018-07-20 | 东莞市元立电子科技有限公司 | A kind of LCD backlight with plate for high luminance light guide structure |
| CN108681188A (en) * | 2018-07-02 | 2018-10-19 | 肯维捷斯（武汉）科技有限公司 | A kind of portable imaging module |
| CN111399302A (en) * | 2018-12-13 | 2020-07-10 | 大众汽车有限公司 | Display device for a means of transportation |
| WO2020220167A1 (en) * | 2019-04-28 | 2020-11-05 | 深圳市汇顶科技股份有限公司 | Backlight module and display apparatus |
| CN110568942A (en) * | 2019-05-02 | 2019-12-13 | 义隆电子股份有限公司 | Light-emitting touch panel |
| CN110568942B (en) * | 2019-05-02 | 2023-05-26 | 义隆电子股份有限公司 | Luminous touch panel |
| CN111679506A (en) * | 2020-06-29 | 2020-09-18 | 维沃移动通信有限公司 | Backlight module and electronic equipment |
| CN114077093A (en) * | 2020-08-13 | 2022-02-22 | 京东方科技集团股份有限公司 | Side-in light source, backlight module and display device |
| US11709309B2 (en) | 2020-08-13 | 2023-07-25 | Beijing Boe Optoelectronics Technology Co., Ltd. | Edge-lit light source, backlight module and display devices |
| US12013567B2 (en) | 2020-08-13 | 2024-06-18 | Beijing Boe Optoelectronics Technology Co., Ltd. | Edge-lit light source, backlight module and display devices |
| CN113253518A (en) * | 2021-05-18 | 2021-08-13 | 武汉华星光电技术有限公司 | Backlight module and display device |
| WO2023108510A1 (en) * | 2021-12-13 | 2023-06-22 | 武汉华星光电技术有限公司 | Backlight module and display panel |
| US11982829B2 (en) | 2021-12-13 | 2024-05-14 | Wuhan China Star Optoelectronics Technology Co., Ltd. | Backlight module and display panel |
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Application publication date: 20150715 |