CN201363668Y - Sidelight type back light module - Google Patents
Sidelight type back light module Download PDFInfo
- Publication number
- CN201363668Y CN201363668Y CNU2009200057818U CN200920005781U CN201363668Y CN 201363668 Y CN201363668 Y CN 201363668Y CN U2009200057818 U CNU2009200057818 U CN U2009200057818U CN 200920005781 U CN200920005781 U CN 200920005781U CN 201363668 Y CN201363668 Y CN 201363668Y
- Authority
- CN
- China
- Prior art keywords
- lgp
- light
- light source
- type back
- back light
- 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 provides a sidelight type back light module, which comprises a light guide plate and a plurality of light sources, wherein the light sources are arranged on the side of at least a light incident surface of the light guide plate, and the light sources are in a state of being periodically rapidly lighted and gone out. For example, the light guide plate comprises a plurality of secondary light guide plates, each light source corresponds to a primary light guide plate. Because the light sources are periodically rapidly lighted and gone out, users are not easy to perceive image residues in a picture.
Description
Technical field
The utility model relates to a kind of backlight module, and is particularly related to a kind of side light type back light module.
Background technology
In recent years, compared to display unit such as cathode-ray tube display and plasma display panels, it is because it approaches, has lower driving voltage and consumption electric power still less than other display unit that LCD can be subjected to widely used reason.
In general, LCD comprises a liquid crystal panel and a backlight module.Liquid crystal panel comprises a membrane transistor substrate, an optical filter and a liquid crystal layer, and wherein liquid crystal layer is between membrane transistor substrate and optical filter.The arrangement meeting of liquid crystal layer changes because of the voltage that is applied to liquid crystal layer, because liquid crystal layer does not produce the light source of himself, so LCD needs backlight module.
Wherein, backlight module can be divided into direct type backlight module and side light type back light module again.Direct type backlight module comprises a light source, a diffuser plate, a diffusion barrier, a reflecting plate, a brightness enhancement film and a carrying container.Wherein, the described light source plate that emits beam and be reflected is directed into diffuser plate, and diffuser plate and diffusion barrier then spread the light that light source produced, in order to avoid the viewing area of LCD presents the phenomenon of luminance nonuniformity.Reflecting plate is the below that is positioned light source, and the part light that light source produced is reflected plate reflection back towards liquid crystal panel incident.Brightness enhancement film has the function of optically focused, when the user when the frontal of liquid crystal panel is watched, the brightness meeting increases because of the cause of brightness enhancement film.In addition, carrying container is then carrying described light source, diffuser plate, diffusion barrier, reflecting plate and brightness enhancement film.
At present, the consumer for LCD need have " wide viewing angle, high contrast, fast picture switch (Fastresponse time), low power consumption, and picture stable (Image stability) " requirement more and more high, and the stable problem to be improved of picture one is exactly image residue.Afterimage phenomenon be to show fixing same picture long-time, when picture switched to next picture, image that can an indistinct residual last picture was called image residue.
In order to solve the problem of image residue, there is manufacturer to release the notion that region point is gone out (localdimming) and put go out (Global dimming) comprehensively at present on the market, it is to solve the problem of image residue by reducing regional area or Zone Full in the time of lighting of one-period, reaches the effect that improves contrast simultaneously.Yet the technology that described region point is gone out all is to be used in direct type backlight module at present, does not apply it to side light type back light module as yet.
Therefore, how allowing the technology that region point is gone out be applied in side light type back light module, is to be worth this area to have to know that usually the knowledgeable goes to consider ground.
Summary of the invention
The utility model main purpose provides a kind of side light type back light module, and this side light type back light module is the technology that the deployment area point goes out, to solve the problem of image residue.
In order to reach described purpose and other purposes, the utility model provides a kind of side light type back light module, and it comprises a LGP and a plurality of light source.Wherein, light source is at least one incidence surface side that is configured in LGP, and these light sources are to present the state that is periodically gone out by point fast.
In described side light type back light module, LGP is made of a plurality of LGPs, and each light source corresponds to wherein LGP.
In described side light type back light module, described light source is the incidence surface side that is configured in the two-phase subtend of LGP.
In described side light type back light module, inferior LGP is adjacent between the inferior LGP that connects and is provided with reflector plate, with isolated time LGP optical path to each other.
In described side light type back light module, described light source is the cold cathode fluorescent lamp pipe.
In described side light type back light module, described light source is a LED lamp bar.
In described side light type back light module, described light source is that cycle and wheel fluidity ground are gone out by point.
The beneficial effects of the utility model are: in backlight module of the present utility model, because light source is to present periodically by place fast to go out, so the user just is difficult for perceiving picture and has image residue.In addition, LGP is divided into LGP a plurality of times, and each time pairing viewing area of LGP is also less, and each light source is controlled all discriminably, if adjust the point of the light source frequency of going out according to the shown picture in the viewing area of LCD, then the contrast of picture can be raised.In addition,, just can completely cut off time LGP optical path to each other, control the brightness that each inferior LGP is presented accurately and reach, and present higher contrast if at inferior LGP and be adjacent between inferior LGP that connects and be provided with reflector plate.
Description of drawings
Fig. 1 is for using the embodiment of side light type back light module of the present utility model.
Fig. 2 is light source among first embodiment of the present utility model and the corresponding relation between LGP.
Fig. 3 is second embodiment of backlight module of the present utility model.
Fig. 4 is the backlight module of the 3rd embodiment of the present utility model.
Fig. 5 is the backlight module of the 4th embodiment of the present utility model.
Fig. 6 is the 5th embodiment of backlight module of the present utility model.
Description of reference numerals: 1-backlight module; The 11-LGP; 111-is LGP for the first time; 112-is LGP for the second time; 113-incidence surface side; The 12-light source; The 13-reflector; The 14-reflector plate; The 15-diffusion barrier; The 16-brightness enhancement film; 161-water chestnut mirror unit; 21,21 '-LGP; 211-LGP; The 214-reflector plate; 22,22 '-light source; 221 '-LED lamp.
The specific embodiment
Below in conjunction with accompanying drawing, be described in more detail with other technical characterictic and advantage the utility model is above-mentioned.
Please refer to Fig. 1, Fig. 1 illustrate is for using the embodiment of side light type back light module of the present utility model.Backlight module 1 comprises a LGP 11, a plurality of light source 12, a plurality of reflector 13, a reflector plate 14, a diffusion barrier 15 and a brightness enhancement film 16, wherein light source 12 is to be configured in the reflector 13, and reflector 13 can reflex to the light that light source 12 is sent in the LGP 11.The effect of LGP 11 is light guiding diffusion barriers 15 and brightness enhancement film 16 that light source 12 is sent, and the effect of reflector plate 14 then is that the light that will expose from the bottom surface of LGP 11 is directed into the LGP 11 again.In addition, diffusion barrier 15 is positioned at the exiting surface side of LGP 11, and the function of diffusion barrier 15 is the light that diffused light source 12 is emitted, makes the block that can not produce light and shade difference on its viewing area at LCD (not illustrating).Brightness enhancement film 16 is positioned at the exiting surface side of diffusion barrier 15, has a plurality of water chestnut mirror units 161 on the brightness enhancement film 16, and this water chestnut mirror unit 161 is to utilize the light refraction principle to revise the directive property of light, to improve the briliancy of backlight module 1.
Please refer to Fig. 2, Fig. 2 is light source among first embodiment of the present utility model and the corresponding relation between LGP.Wherein, the incidence surface side 113 that is positioned at LGP 11 both sides is equipped with light source 12 respectively, and this light source 12 is cold cathode fluorescent lamp pipe (Cold Cathode Fluorescent Lamp).In addition, 11 of LGPs are cut into a LGP 111 and LGP 112 for the first time for the second time, and LGP 111 is to correspond to the light source 12 that is positioned at the left side for the first time, and LGP 112 then is to correspond to the light source 12 that is positioned at the right side for the second time.Also be, for the first time the function of LGP 111 mainly is to be positioned at the light guiding diffusion barrier 15 and brightness enhancement film 16 (as shown in Figure 1) that the light source 12 in left side is sent, and LGP 112 then is the light guiding diffusion barrier 15 and brightness enhancement film 16 that the light source 12 that will be positioned at the right side is sent for the second time.
Please continue with reference to Fig. 2, no matter be that the light source 12 that is positioned at right side or left side all periodically and is apace gone out by point, also be that light source 12 is to present flicker apace.At this, " fast " is meant " allowing human naked eyes can't pick out light source 12 is carrying out periodicity place and go out ", and the cycle is meant " light source is lighted the back and passed through by lighting the individual time to next time again ".Because light source 12 is gone out by place fast, so the user just is difficult for perceiving picture and has image residue.At this, the mode that light source 12 is gone out by point can be that cycle and wheel streaming ground are gone out by point, and also promptly when the light source 12 in left side is lighted, 12 of the light sources on right side are gone out by point, and puts when going out when light source 12 quilts in left side, and 12 of the light sources on right side are lighted.
The mode that described light source 12 quilt points go out can also be adjusted according to the shown picture in the viewing area of LCD except being gone out by point in the mode of periodic.For example, when the first time LGP 111 pairing viewing areas be when presenting darker picture, be arranged in the time that the light source 12 in left side lighted in whole cycle to tail off.Perhaps, when the second time LGP 112 pairing viewing areas be when presenting brighter picture, the time that the light source 12 that is arranged in the right side was lighted in the whole cycle then increases.By described mode, just can improve the contrast of picture.
By as can be known described, backlight module 1 of the present utility model is except the problem that can solve image residue, and the some frequency of going out by control light source 12 can make the picture of viewing area present preferable contrast.In addition, because light source 12 is not to be presented on the state of being lighted always, the spent energy of backlight module therefore of the present utility model 1 is less, and can allow increase the service life of light source 12.
The LGP 11 of described embodiment be by the first time LGP 111 constituted with LGP 112 for the second time, but this area has and knows that usually the knowledgeable can be designed to LGP 11 be made of more time LGP.Please refer to Fig. 3, Fig. 3 illustrate is second embodiment of backlight module of the present utility model.In Fig. 3, only show LGP and light source, remaining element just no longer illustrates because of same as shown in Figure 2.In the present embodiment, LGP 21 is made of 10 LGPs 211, and per 5 LGPs 211 formations one row, and LGP 211 all corresponds to a wherein light source 22 each time.
If light source 22 is that when wherein a light source 22 quilts were extinguished, other 9 light sources 22 still were in the state of being lighted when presenting the state that cycle and wheel fluidity ground is gone out by point.For cold-cathode tube, the reaction time of driving is comparatively slowly, so the practice is gone out compared to comprehensive point, each light source 22 can have longer lighting the time, is comparatively suitable for driving cold-cathode tube.And compared to first embodiment, because the LGP of present embodiment is divided into LGP 211 10 times, each time LGP 211 pairing viewing areas are also less, and each light source 22 is controlled all discriminably, so the contrast of picture can be raised.
Please refer to Fig. 4, Fig. 4 illustrate is the backlight module of the 3rd embodiment of the present utility model.The maximum difference of the 3rd embodiment and second embodiment is: in the 3rd embodiment, inferior LGP 211 and be adjacent 211 of inferior LGPs that connect and be provided with reflector plate 214 so just can completely cut off time LGP 211 optical path to each other.Can not be delivered to other inferior LGP 211 owing to be arranged in the light of a LGP 211 wherein,, and can not be subjected to the influence of other light sources 22 so the brightness that each inferior LGP 211 is presented can be controlled by its pairing light source 22 accurately.Also therefore, the backlight module of present embodiment can provide higher contrast ratio.
In described embodiment, light source 12 is a cold cathode fluorescent lamp, but this area has and knows that usually the knowledgeable can be replaced as it light source of other kinds.Please refer to Fig. 5, Fig. 5 illustrate is the backlight module of the 4th embodiment of the present utility model.In the backlight module of present embodiment, the light source that the incidence surface side disposed 22 ' of inferior LGP 211 is LED lamp bar, has a plurality of LED lamps 221 ' on this LED lamp bar.
Though, in described embodiment, inferior LGP is to be combined into LGP after the moulding respectively, and be not to be to be divided into LGP more a plurality of times after molding a LGP, the reason of Zhi Zaoing is in such a manner: the volume of inferior LGP is less, so the mould stream when ejection formation is easier to control, its moulding is more or less freely, and under the situation that the site of LGP scope reduces, yield also can improve.Otherwise if the bigger LGP of one-shot forming volume, the mould stream during owing to ejection formation is more wayward, and its moulding is not easy, and under the site of LGP scope increased, yield also can reduce.Yet, this area have know usually the knowledgeable also can be according to situation the bigger LGP of one-shot forming volume, and be not divided into LGP a plurality of times.
Please refer to Fig. 6, Fig. 6 is the 5th embodiment of backlight module of the present utility model.In the present embodiment, the maximum differential of itself and second embodiment is: described LGP 21 ' is made up of a plurality of LGPs, but presents the tabular of a monoblock.22 of light sources are configured in the incidence surface side 213 ' of the two-phase subtend of LGP 21 ', and are to present the state that is periodically gone out by point fast.
In addition, in described embodiment, light source is the incidence surface side that is configured in the two-phase subtend of LGP, but this area has and knows that usually the knowledgeable also can only be configured in light source a wherein side of LGP.
More than explanation is just illustrative for the utility model, and nonrestrictive, those of ordinary skills understand; under the situation of the spirit and scope that do not break away from claim and limited, can make many modifications, change; or equivalence, but all will fall in the protection domain of the present utility model.
Claims (7)
1. a side light type back light module is characterized in that, comprising:
One LGP; And
A plurality of light sources, described light source are configured at least one incidence surface side of described LGP, and described a plurality of light sources are to present the state that is periodically gone out by point fast.
2. side light type back light module according to claim 1 is characterized in that described LGP is made of a plurality of LGPs, and described each light source corresponds to wherein LGP.
3. side light type back light module according to claim 1 and 2 is characterized in that, described light source is the incidence surface side that is configured in the two-phase subtend of described LGP.
4. side light type back light module according to claim 1 and 2 is characterized in that, is provided with reflector plate between described LGP and adjacent inferior LGP, and described reflector plate is with isolated time LGP optical path to each other.
5. side light type back light module according to claim 1 and 2 is characterized in that, described light source is the cold cathode fluorescent lamp pipe.
6. side light type back light module according to claim 1 and 2 is characterized in that, described light source is a LED lamp bar.
7. side light type back light module according to claim 1 and 2 is characterized in that, described light source is that cycle and wheel fluidity ground are gone out by point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200057818U CN201363668Y (en) | 2009-03-11 | 2009-03-11 | Sidelight type back light module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200057818U CN201363668Y (en) | 2009-03-11 | 2009-03-11 | Sidelight type back light module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201363668Y true CN201363668Y (en) | 2009-12-16 |
Family
ID=41474332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009200057818U Expired - Fee Related CN201363668Y (en) | 2009-03-11 | 2009-03-11 | Sidelight type back light module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201363668Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101915396A (en) * | 2010-07-28 | 2010-12-15 | 深圳市华星光电技术有限公司 | Light guide plate and liquid crystal display module |
| CN102142233A (en) * | 2010-01-28 | 2011-08-03 | 联发科技股份有限公司 | Local dimming control method and apparatus |
| CN102506341A (en) * | 2011-10-12 | 2012-06-20 | 康佳集团股份有限公司 | Backlight device of LED (light-emitting diode) liquid crystal television and light guide plate |
| CN103075679A (en) * | 2012-11-01 | 2013-05-01 | 京东方科技集团股份有限公司 | Back light source and display |
| CN111273483A (en) * | 2020-02-15 | 2020-06-12 | 苏州视达讯远电子科技有限公司 | Long-life LCD (liquid crystal display) screen backlight mechanism and working method thereof |
-
2009
- 2009-03-11 CN CNU2009200057818U patent/CN201363668Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142233A (en) * | 2010-01-28 | 2011-08-03 | 联发科技股份有限公司 | Local dimming control method and apparatus |
| CN101915396A (en) * | 2010-07-28 | 2010-12-15 | 深圳市华星光电技术有限公司 | Light guide plate and liquid crystal display module |
| US8593587B2 (en) | 2010-07-28 | 2013-11-26 | Shenzhen China Star Optoelectronics Technology Co., Ltd. | Multi-level light guide plate and liquid crystal display module |
| CN102506341A (en) * | 2011-10-12 | 2012-06-20 | 康佳集团股份有限公司 | Backlight device of LED (light-emitting diode) liquid crystal television and light guide plate |
| CN103075679A (en) * | 2012-11-01 | 2013-05-01 | 京东方科技集团股份有限公司 | Back light source and display |
| CN111273483A (en) * | 2020-02-15 | 2020-06-12 | 苏州视达讯远电子科技有限公司 | Long-life LCD (liquid crystal display) screen backlight mechanism and working method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1922575B1 (en) | Illumination module | |
| EP2067065B1 (en) | Illumination system, luminaire and display device | |
| CN102767762B (en) | Backlight module | |
| KR20130061796A (en) | Optical assembly, backlight unit having the same, and display apparatus thereof | |
| CN102691945B (en) | Edge-lighting backlight module | |
| WO2011048830A1 (en) | Backlight device, image display apparatus comprising same, and driving method | |
| CN201363668Y (en) | Sidelight type back light module | |
| CN101526692A (en) | Side-light type back light | |
| KR101777528B1 (en) | Backlight module and liquid crystal display device using same | |
| KR102257200B1 (en) | Prism sheet and liquid crystal display device having the same | |
| KR100717319B1 (en) | Diffusion panel for liquid crystal display device and back light unit thereof | |
| KR101274687B1 (en) | back light unit and liquid crystal display device using the same | |
| KR101070686B1 (en) | Composite Sheet for LCD, and Backlight Unit Using The Same | |
| WO2007018361A1 (en) | Lcd light guiding plate and back light unit and lcd using a thereof | |
| RU2504810C1 (en) | Liquid crystal display device | |
| CN201054057Y (en) | Direct type high brightness backlight | |
| CN101470221B (en) | Diffusion plate and backlight module using the same | |
| KR20060028895A (en) | Backlight unit | |
| KR20120079230A (en) | Display apparatus | |
| WO2012005320A1 (en) | Illumination device and liquid-crystal display device | |
| CN204573756U (en) | Backlight module and display unit | |
| JP3126875U (en) | Rear projection LCD backlight illumination device | |
| KR20090025566A (en) | Lcd backlight sturucture for high brightness and very low brightness | |
| KR20110027277A (en) | The backligth unit for lcd display | |
| CN212781600U (en) | Light-modulation LED backlight capable of splitting light |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091216 Termination date: 20120311 |