CN201439909U - backlight module - Google Patents
backlight module Download PDFInfo
- Publication number
- CN201439909U CN201439909U CN200920136898XU CN200920136898U CN201439909U CN 201439909 U CN201439909 U CN 201439909U CN 200920136898X U CN200920136898X U CN 200920136898XU CN 200920136898 U CN200920136898 U CN 200920136898U CN 201439909 U CN201439909 U CN 201439909U
- Authority
- CN
- China
- Prior art keywords
- backlight module
- reflecting element
- reflecting
- distance
- module according
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The utility model relates to a backlight module, which comprises a shell, a reflection plate and a plurality of light sources, wherein the reflection plate is provided with a plurality of first reflection pieces and a plurality of second reflection pieces, the first reflection pieces define a plurality of scanning areas, the second reflection pieces and a plurality of light components are alternatively arranged inside the scanning areas, and the second reflection pieces are higher than the light sources. The backlight module can effectively prevent the halation phenomenon and can improve the picture quality of a liquid crystal monitor.
Description
Technical field
The utility model is about a kind of backlight module, particularly a kind of scanning backlight module.
Background technology
Known scanning backlight (scan backlight) technology makes existing LCD be able to the video picture mode of the pulsed of effective emulation conventional cathode ray tube TV or display (impulse type), open or close by backlight lamp tube in the LCD is intermittent, reduce the liquid crystal pictorial display time, to reduce the afterimage (after image) that human eye is experienced, simultaneously, the overdrive mode of (over drive) of collocation, it is by applying a pairing electric-field intensity when being higher than originally stable state, accelerate the reaction speed of liquid crystal, so that liquid crystal can rotate to predetermined angle in the short period of time, with dynamic image reaction time (Motion/Moving Picture Response Time, MPRT) shorten to time of a picture, improve the dynamic image quality of LCD.
Yet, when the different timings of image signal with the backlight lamp tube switching frequency, for example: the liquid crystal of liquid crystal panel is still in the response time, this moment liquid crystal the GTG value size of miss the mark GTG value still, but the backlight lamp tube of liquid crystal below is opened, making that the audience is indistinct sees the display frame that should not occur, and promptly produces so-called ghost (ghost) phenomenon, influences the contrast of display frame and causes the animation quality to descend.In addition, adjacent imagery zone may be because poor effect at interval, and makes light overflow to loose and zone to contiguous cause the image of this imagery zone that the dizzy situation of opening is arranged, this phenomenon is called halation phenomenon (blooming), can reduce the picture quality of this LCD equally; Therefore, for obtaining good image, the necessity that not enough reinforcement improves at prior art is arranged really.
Summary of the invention
Because above-mentioned considering, the purpose of this utility model is for providing a kind of reflecting plate that is applicable to the scanning backlight module.It can effectively avoid taking place halation phenomenon, has improved the picture quality of LCD.
For reaching above-mentioned purpose, the utility model provides a kind of backlight module, and it comprises a housing, a reflecting plate and a plurality of light source.This housing has an accommodation space, and this reflecting plate is to place this accommodation space bottom, and this reflecting plate comprises a plurality of first reflecting elements and a plurality of second reflecting element; These first reflecting elements are in order to define a plurality of scanning blocks, these second reflecting elements and these light sources are to be spaced in this scanning block respectively, wherein, respectively the upper limb of this first reflecting element is one first distance apart from the distance of this accommodation space bottom, respectively the upper limb of this second reflecting element is a second distance apart from the distance of this accommodation space bottom, and respectively the top of this light source is one the 3rd distance apart from the distance of this accommodation space bottom, wherein, this first distance is greater than this second distance, and this second distance is greater than the 3rd distance.
The structure of the reflecting plate of backlight module of the present utility model has interval repeatability, be to define therebetween scanning area by these first reflecting elements, and these first reflecting elements can stop excessive other scanning area that is dissipated to of light, to avoid halation phenomenon, these second reflecting elements can improve the briliancy uniformity in each scanning area, to solve known problem because of the bright dark line that luminance nonuniformity was caused.
Description of drawings
The 1st figure is a backlight module that is illustrated according to one first preferred embodiment of the present utility model.
The 2nd figure is the backlight module that is illustrated according to one second preferred embodiment of the present utility model.
The 3rd figure is a backlight module that is illustrated according to one the 3rd preferred embodiment of the present utility model.
The 4th figure is the backlight module that is illustrated according to one the 4th preferred embodiment of the present utility model.
The 5th figure is a backlight module that is illustrated according to one the 5th preferred embodiment of the present utility model.
The 6th figure is the backlight module that is illustrated according to one the 6th preferred embodiment of the present utility model.
Primary clustering symbol description in the accompanying drawing:
10,30,40,50,60,70: backlight module
12: housing
14,32,42,52,62,72: reflecting plate
141,321,421,521,621,721: the first reflecting elements
142,322,422,522,622,623,722: the second reflecting elements
16,34,44,54,64,74: light source
18,36,46,56,66,76: blooming piece
20: accommodation space
22,24: scanning area
H
1: first distance
H
2: second distance
H
3: the 3rd distance
H
4: the 4th distance
The specific embodiment
Below will concrete preferred embodiment of the present utility model be described with the reference icon, these icons are several certain specific embodiments that can implement according to this in explanation the utility model, so do not get rid of other specific embodiment, and its structure can adjust, still not break away from category of the present utility model.
Please refer to the 1st figure, it is a backlight module 10 that is illustrated according to one first preferred embodiment of the present utility model, it is one scan formula backlight module for a liquid crystal panel (figure does not show) rear, it comprises a housing 12, one reflecting plate 14, a plurality of light sources 16 and at least one blooming piece 18, wherein, housing 12 is to have an accommodation space 20, reflecting plate 14 is to place accommodation space 20 bottoms, and reflecting plate 14 is to comprise a plurality of first reflecting elements 141 and a plurality of second reflecting element 142, the symmetrical equilateral triangle post shown in the 1st figure for example, but not as limit, 141 of these first reflecting elements are at a distance of a preset distance, to define a plurality of scanning areas 22,24.Being provided with a plurality of light sources 16 in the scanning area 22,24, is to be staggered with a plurality of equally spaced second reflecting element, 142 each intervals; In addition, the distance between the upper limb of first reflecting element 141 and accommodation space 20 bottoms is one first distance H
1, the distance between the upper limb of second reflecting element 142 and accommodation space 20 bottoms is a second distance H
2, and the distance between the top of light source 16 and accommodation space 20 bottoms is one the 3rd distance H
3, shown in the 1st figure, first reflecting element 141 of the present utility model is to be higher than second reflecting element 142, that is, and and first distance H
1Greater than second distance H
2(H
1＞H
2), again, second reflecting element 142 is higher than light source 16 again, that is, and and second distance H
2Greater than the 3rd distance H
3(H
2＞H
3).
Shown in the 1st figure, the first higher reflecting element 141 with these light sources 16 every in two scanning areas 22,24, when backlight module 10 runnings, it is the scanning sequence that cooperates this liquid crystal panel in the place ahead, to open corresponding scanning area 22 or scanning area 24, for example: when the light source 16 of scanning area 22 was lighted, the light source 16 of scanning area 24 was to maintain closing state; Similarly, when the light source 16 of scanning area 24 was lighted, 16 of the light sources of opening originally in the scanning area 22 can be closed before the light source 16 of scanning area 24 is lighted; When these light sources 16 in the scan pattern activation scanning area 22 of backlight module 10, the first highly higher reflecting element 141 can appropriateness stop that the light spill and leakage in the scanning area 22 arrives the scanning area 24 of closed condition, avoid taking place halation phenomenon, in addition, compared to first reflecting element 141, the second highly lower reflecting element 142 can promote light reflecting effect in the scanning area 22, make light be evenly distributed in the scanning area 22, significantly improve the bright dark line problem that is caused in the time of to improve the light inequality, all spend (uniformity ofbrightness) together with the briliancy of promoting backlight module 10, and the effect of optical gain is arranged.It should be noted that the upper limb of first reflecting element 141 keeps one the 4th distance H with the blooming piece 18 of the exiting surface of being located at backlight module 10 for fear of produce the dark space above first reflecting element 141 when backlight module 10 operates
4, be unlikely to too to press close to blooming piece 18 with the upper limb of guaranteeing first reflecting element 141.
Please refer to the 2nd figure, the backlight module 30 that it is illustrated according to one second preferred embodiment of the present utility model, be simplified illustration, the 2nd figure only shows reflecting plate 32, light source 34 and the blooming piece 36 of backlight module 30, and the corresponding relation of its position, height is identical with first preferred embodiment.Reflecting plate 32 shown in second preferred embodiment comprises a plurality of first reflecting elements 321 and a plurality of second reflecting element 322, compare with first preferred embodiment, first reflecting element 321 of second preferred embodiment or second reflecting element 322 are for having the chevron structure of fillet, chevron structure upper limb is the fillet with radian, mild angle makes light be able to more even dispersion, causes a plurality of bright lines, the staggered problem of concealed wire (mura) because of the light source inequality when avoiding backlight module 30 runnings.
Then please refer to the 3rd figure, it is the backlight module 40 that is illustrated according to one the 3rd preferred embodiment of the present utility model, be simplified illustration, the 3rd figure only illustrates reflecting plate 42, light source 44 and the blooming piece 46 of backlight module 40, wherein, first reflecting element 421 of reflecting plate 42 and second reflecting element 422 are semicircular structure.
Please refer to the 4th figure in addition, it is the backlight module 50 that is illustrated according to one the 4th preferred embodiment of the present utility model, be simplified illustration, the 4th figure only illustrates reflecting plate 52, light source 54 and the blooming piece 56 of backlight module 50, wherein, first reflecting element 521 and second reflecting element 522 of reflecting plate 52 are wavy shaped configuration, and its both sides are the cambered surface that recess makes progress.
The structure of reflecting element is not limited to the form of aforementioned preferred embodiment, and first reflecting element can also have different appearance structures with second reflecting element, please refer to the 5th figure.The 5th figure is the backlight module 60 that is illustrated according to one the 5th preferred embodiment of the present utility model, be simplified illustration, the 5th figure only illustrates reflecting plate 62, light source 64 and the blooming piece 66 of backlight module 60, wherein, first reflecting element 621 of reflecting plate 62 and part second reflecting element 622 are symmetrical equilateral triangle post, second reflecting element 623 of part then be the asymmetric inequilateral triangular prism in the left and right sides, and between second reflecting element 622 and second reflecting element 623 or the spacing between second reflecting element 623 and first reflecting element 621 also unequal; In addition, first reflecting element 621 is not limited to the left-right symmetry triangular prism shown in the 5th figure, can also be the asymmetric inequilateral triangular prism in the left and right sides.
Please refer to the 6th figure at last, it is the backlight module 70 that is illustrated according to one the 6th preferred embodiment of the present utility model, be simplified illustration, the 6th figure only illustrates the reflecting plate 72 of backlight module 70, light source 74 and blooming piece 76, wherein, first reflecting element 721 of reflecting plate 72 and the shape of second reflecting element 722 are also unequal, shown in the 6th figure, respectively this first reflecting element 721 is to be a wavy shaped configuration, second reflecting element 722 then is a semicircular structure, and each 721 of first reflecting element only is provided with one second reflecting element 722 and two light sources of being located between these reflecting elements 74, is the scanning area with two light sources by first reflecting element, 721 defined scanning areas therefore.
In each embodiment of the present utility model, light source can be cold cathode fluorescent lamp pipe, light emitting diode (LED) or light emitting diode array that light emitting diode constituted, and between second reflecting element or between first reflecting element and second reflecting element more than one light source can be set, in addition, light source number in each scanning area is not limited to four light sources or the two light source shown in the previous embodiment, can also be single light source or a plurality of light source; In addition, the blooming piece of being located at the exiting surface of backlight module is to be a diffuser plate, but not as limit, blooming piece can also be LGP, brightness enhancement film (brightness enhancement sheet), polaroid (polarizer), wavelength phasic difference plate (retardation film), other is applicable to the film or the aforesaid combination of backlight module; In addition, reflecting plate described in the utility model is by high reflecting material, as silver, aluminium, chromium, metal or its alloys such as gold, through mold, etching, ejection formation, processing procedure such as screen painting or machining forms integrated reflecting plate, reflecting plate also can be overlapped by the structure sheaf of plural layer unlike material and form again, for example: with resin, high molecular polymer, raw materials such as plastics, through mold, processing procedures such as machining ejaculation are produced the basic stereochemical structure of reflecting plate, again in reflecting plate surface coverage one metal coating or a metal particle film, in the middle of the metal ingredient or other particulate that contain, titanium dioxide fine particles for example, glass granules etc. all have the effect of strengthening the light reflection; Simultaneously, based on spirit of the present utility model, first reflecting element and second reflecting element remove can be by aforesaid processing procedure, produce integrated reflecting plate, also a reflecting material can be made in a smooth substrate surface, utilize the thickness of this reflecting material to produce first reflecting element shown in each embodiment and the stereochemical structure of second reflecting element, can reach the default reflecting effect of the utility model equally.
Hence one can see that, the utility model provides a kind of backlight module, for example a kind of scanning backlight module, the structure of the reflecting plate of this backlight module has interval repeatability, be to define therebetween scanning area by a plurality of first reflecting elements, and the light source and second reflecting element are crisscross arranged in each scanning area, wherein, the height of first reflecting element can be greater than second reflecting element, in order to separate out different scanning areas, and improve the halation phenomenon of known scan-type reflector, and then shorten the dynamic image reaction time, in addition, the height of the upper limb of second reflecting element is to be higher than these light sources, and can improve the light uniformity in the scanning area, avoid producing bright dark line because of luminance nonuniformity.In addition, the reflecting plate shown in the utility model is not only applicable to the scanning backlight module, also applicable to the backlight module that does not generally need fluid,matching crystal panel scanning sequence.
The above only is preferred embodiment of the present utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to covering scope of the present utility model.
Claims (10)
1. backlight module is characterized in that it comprises:
One housing, it has an accommodation space;
One reflecting plate places this accommodation space bottom, and this reflecting plate comprises:
A plurality of first reflecting elements, in order to defining a plurality of scanning blocks, and respectively the upper limb of this first reflecting element is one first distance apart from the distance of this accommodation space bottom; And
A plurality of second reflecting elements are located at respectively in this scanning block, and respectively the upper limb of this second reflecting element is a second distance apart from the distance of this accommodation space bottom; And
A plurality of light sources place in these scanning blocks, and these light sources and these second reflecting elements are to be spaced in these scanning blocks, and respectively the top of this light source is one the 3rd distance apart from the distance bottom this accommodation space;
Wherein, this first distance is greater than this second distance, and this second distance is greater than the 3rd distance.
2. backlight module according to claim 1 is characterized in that: described backlight module is to be one scan formula backlight module.
3. backlight module according to claim 1 is characterized in that: other comprises an optical thin film, places an exiting surface of this backlight module.
4. backlight module according to claim 3 is characterized in that: wherein respectively the upper limb of this first reflecting element and this optical thin film are to keep one the 4th distance.
5. backlight module according to claim 1 is characterized in that: wherein respectively the height of this first reflecting element is higher than the respectively height of this second reflecting element.
6. backlight module according to claim 1 is characterized in that: wherein respectively the height of this second reflecting element is the top that is higher than these light sources;
Wherein respectively this first reflecting element has identical appearance structure with this second reflecting element respectively.
7. backlight module according to claim 6 is characterized in that: wherein respectively this first reflecting element is to have the chevron structure of fillet for an equilateral triangular prism, a wavy shaped configuration, a semicircle structure or;
Wherein respectively this second reflecting element is to have the chevron structure of fillet for an equilateral triangular prism, a wavy shaped configuration, a semicircle structure or.
8. backlight module according to claim 1 is characterized in that: wherein respectively this first reflecting element and this each tool of second reflecting element appearance structure inequality respectively.
9. backlight module according to claim 8 is characterized in that: wherein respectively this first reflecting element is to be selected from chevron structure or the aforesaid combination that an equilateral triangle post, a wavy shaped configuration, a semicircle structure, have fillet.
10. backlight module according to claim 9 is characterized in that: wherein respectively this second reflecting element is to be selected from chevron structure or the aforesaid combination that an equilateral triangle post, a wavy shaped configuration, a semicircle structure, have fillet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920136898XU CN201439909U (en) | 2009-03-03 | 2009-03-03 | backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920136898XU CN201439909U (en) | 2009-03-03 | 2009-03-03 | backlight module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201439909U true CN201439909U (en) | 2010-04-21 |
Family
ID=42544579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920136898XU Expired - Fee Related CN201439909U (en) | 2009-03-03 | 2009-03-03 | backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201439909U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913825A (en) * | 2012-11-02 | 2013-02-06 | 京东方科技集团股份有限公司 | Illumination unit, backlight module and display device |
-
2009
- 2009-03-03 CN CN200920136898XU patent/CN201439909U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913825A (en) * | 2012-11-02 | 2013-02-06 | 京东方科技集团股份有限公司 | Illumination unit, backlight module and display device |
| CN102913825B (en) * | 2012-11-02 | 2015-07-01 | 京东方科技集团股份有限公司 | Illumination unit, backlight module and display device |
| US10302856B2 (en) | 2012-11-02 | 2019-05-28 | Boe Technology Group Co., Ltd. | Light-emitting unit, backlight module and display device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106952621B (en) | A kind of display device and its driving method | |
| US7053880B2 (en) | Method of color image display for a field sequential liquid crystal display device | |
| US8023074B2 (en) | Liquid crystal display unit | |
| CN102901000B (en) | Back light unit and the display device using the back light unit | |
| CN101910708B (en) | Illuminating device and liquid crystal display device | |
| JP5792343B2 (en) | Backlight with video and content control | |
| US8339426B2 (en) | Illuminator and display having same | |
| KR20130061796A (en) | Optical assembly, backlight unit having the same, and display apparatus thereof | |
| CN104216167B (en) | Liquid crystal display device | |
| JP2014535073A (en) | Curved bezel concealed display device cover and display device without bezel | |
| SG192177A1 (en) | Multi-display system and translucent cover used thereby | |
| JP2007003805A (en) | Illumination device and display apparatus with same | |
| US20070268426A1 (en) | Color-filterless LCD | |
| CN107193069B (en) | A kind of grating and double vision display device | |
| WO2016050067A1 (en) | Reflection sheet, backlight module and display device | |
| CN106405928A (en) | Light source module | |
| CN102207565B (en) | Multifunctional optical sheet, and backlight module and liquid crystal display device with optical sheet | |
| CN105739180A (en) | Backlight module, a narrow-frame liquid crystal display device and forming process of plastic frame | |
| US8350800B2 (en) | Display device | |
| GB2544895A (en) | Backlight unit and liquid crystal display device including the same | |
| CN201439909U (en) | backlight module | |
| JP2011060706A (en) | Lighting system and display device | |
| US8817206B2 (en) | Backlight module and display apparatus thereof | |
| CN102646397A (en) | Method and device for scanning backlight | |
| WO2022032738A1 (en) | Backlight module and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: CHINA PROJECTION TUBE CO., LTD. Effective date: 20130605 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130605 Address after: 350015 No. 1 Xingye Road, Mawei Science Park, Fujian, Fuzhou Patentee after: CPTF Optronics Co., Ltd. Address before: 350015 No. 1 Xingye Road, Mawei Science Park, Fujian, Fuzhou Patentee before: CPTF Optronics Co., Ltd. Patentee before: Chunghwa Picture Tubes Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100421 Termination date: 20180303 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |