CN1523421A - Backlight module - Google Patents
Backlight module Download PDFInfo
- Publication number
- CN1523421A CN1523421A CNA031044735A CN03104473A CN1523421A CN 1523421 A CN1523421 A CN 1523421A CN A031044735 A CNA031044735 A CN A031044735A CN 03104473 A CN03104473 A CN 03104473A CN 1523421 A CN1523421 A CN 1523421A
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- CN
- China
- Prior art keywords
- light source
- backlight module
- locating device
- shell
- display panel
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Abstract
The invention provides a backlight module, set under a display panel and containing an outer housing, many light source units, a diffusing plate set between these light source units and the display panel, at least a prism set on the diffusing plate surface and a light guide plate (LGP) set between these light source units and the diffusing plate. Each light source unit is coated in the outer housing, removably, and contains at least a light source generator to provide a light source, a reflecting sheet set under the light source generator and an inner housing set under the reflecting sheet and coating the reflecting sheet.
Description
Technical field
The invention provides a kind of backlight module (back light module), particularly a kind of backlight module with the light source module (light source unit) of a plurality of detachable (swappable).
Background technology
Backlight module is one of key part and component of lcd products, has been widely used at present on digital camera, personal digital assistant (PDA), satellite navigation system, computer monitor and the flat-surface television.Generally speaking, backlight module all is located at the below of a display panel (display panel), and have a light source and a diffuser plate (diffusing plate), to provide a homodisperse light, relend by the pixel electrode on the control display panel and form suitable image to this display panel.Wherein, backlight module can be according to the position of light source, is divided into light source and produces from (directilluminance) backlight module of the straight-down negative under the display panel or light source near the side-light type the display panel side (edge light) backlight module.And because direct type backlight module is located at light source generator under the display panel, therefore can be applicable to the display panel of higher brightness demand or large-size, for example computer monitor and flat television etc.
Please refer to Fig. 1, Fig. 1 is the diagrammatic cross-section of a traditional backlight module 10.As shown in Figure 1, backlight module 10 is belows of being located at a display panel 12, and include that at least one light source generator (lightsource generator) 14, one diffuser plate (diffusing plate) 16 is located between light source generator 14 and the display panel 12, a light guide plate (light guide plate, LGP) 18, be located between light source generator 14 and the diffuser plate 16 and a reflecting plate (reflecting sheet) 20 is located at light source generator 14 belows and is fixed on the shell (housing) 22.Wherein, light source generator 14 is to be used to provide a light source to display panel 12, reflecting plate 20 is that the light that is used for light source generator 14 is produced upwards reflects, to increase the utilization rate of light, and then provide a preferred brightness to export, light guide plate 18 be this light source scattering (scatter) of being used for light source generator 14 is produced to diffuser plate 16, diffuser plate 16 can be with the further scattering of light by diffuser plate 16, to provide display panel 12 more homodisperse light.And be located at reflecting plate 20 belows and coat reflecting plate 20 shell 22 on every side, then be to be used for fixing diffuser plate 16, light guide plate 18, reflecting plate 20 and light source generator 14.In addition, the general at least one prism (prism) 24 that above diffuser plate 16, is provided with in addition usually, with the difference of further correction intensity of illumination, the light that display panel 12 is received can have an intensity of illumination distribution uniformly, and prism 24 set quantity and the visual demands of order are changed.
Generally speaking, the light source generator 14 in the backlight module is that (cold cathode fluorescent lamp CCFL) constitute, and respectively this fluorescent tube is to arrange with parallel mode by a cathode fluorescent tube mostly.In order to satisfy the product demand of high brightness, the briliancy (brightness) of the light source generator 14 that is adopted in the above-mentioned backlight module 10 improves day by day with quantity, therefore when operation in case wherein a light source generator 24 break down, then tend to produce the problem of luminance nonuniformity (unbalanced brightness), cause the shadow (light grating) that obviously presents paliform on the display panel 12, that is be commonly called as ooze light (light bleed-through) phenomenon, just must disassemble backlight module 10 maintenance or the replacing with the light source generator 14 that carries out fault this moment, to guarantee the display quality of display panel 12.Yet the dismantlement work of backlight module 10 is rather consuming time, and in the process of this dismounting with maintenance and replacing, the operator needs only careless slightly, often easily because of improper touching causes weighing wounded of light guide plate 18 or reflecting plate 20, and then the display quality of reduction display panel 12.Therefore will how to prevent that a disappearance is to keep display quality here when maintenance and replacing light source generator 14, real is current important topic.
Summary of the invention
Therefore fundamental purpose of the present invention is to provide a kind of backlight module (back light module), to solve the problem of above-mentioned traditional backlight module inconvenient maintenance.
In most preferred embodiment of the present invention, this backlight module is to be located at a display panel (display panel) below, and backlight module include a shell (outer housing), a plurality of light source module (light source unit), that is coated on removably within this shell be located at the diffuser plate (diffusing plate) between these a plurality of light source modules and this display panel, at least one prism (prism) and of being located at this diffuser plate surface be located at light guide plate between these a plurality of light source modules and this diffuser plate (light guideplate, LGP).Wherein this diffuser plate be this light source scattering (scatter) of being used for light source generator is produced to this display panel, this light guide plate then is to be used for this light source that this light source generator produces is scattered to this diffuser plate.In addition, respectively this light source module all includes at least one light source generator (light source generator), that is used to provide a light source and is located at this light source generator below, is located at this reflecting plate below and coats inner casing (inner housing) around this reflecting plate in order to the reflecting plate (reflecting sheet) and that this light source is upwards reflexed to this display panel.
Since this backlight module of the present invention be adopt a plurality of independently of one another and coat this light source module within this shell in the mode of detachable (swappable), and be respectively equipped with interactional one first locating device and one second locating device on the interior diapire of an exterior bottom wall of this inner casing and this shell, therefore when this light source generator of arbitrary this light source module breaks down, can extract this light source module 54 that comprises out of order this light source generator out repair or replace work very easily.In addition, this design can avoid the operator to cause weighing wounded of this light guide plate or this reflecting plate because of improper touching, so can guarantee that the display quality of this display panel is not affected, and keeps competitiveness of product when maintenance and this light source generator of replacing.
Description of drawings
Fig. 1 is the diagrammatic cross-section of traditional backlight module.
Fig. 2 is the forward sight diagrammatic cross-section of backlight module of the present invention.
Fig. 3 (a) for the shell among Fig. 2 52 be coated on inner casing 64 in the shell 52 on look diagrammatic cross-section.
Fig. 3 (b) is shell among Fig. 2 52 and the last side-looking diagrammatic cross-section that is coated on the inner casing 64 in the shell 52.
Fig. 4 (a) is in the another embodiment of the present invention, shell among Fig. 2 52 be coated on inner casing 64 in the shell 52 on look diagrammatic cross-section.
Fig. 4 (b) is in the another embodiment of the present invention, shell 52 among Fig. 2 and the side-looking diagrammatic cross-section that is coated on the inner casing 64 in the shell 52.
Symbol description
10 backlight modules, 12 display panels
14 light source generators, 16 diffuser plates
18 light guide plate, 20 reflecting plates
22 shells, 24 prisms
40 display panels, 50 backlight modules
Diapire in the 52 shell 52a
The right inwall of 52b left side inwall 52c
54 light source modules, 56 diffuser plates
58 light guide plate, 60 light source generators
62 reflecting plates, 64 inner casings
64a exterior bottom wall 64b left side outer wall
Right outer wall 66 prisms of 64c
68 first locating devices, 70 second locating devices
72 rotating shafts, 74 first locating devices
76 second locating devices
Embodiment
Please refer to Fig. 2, Fig. 2 is the forward sight diagrammatic cross-section of backlight module of the present invention (back light module) 50.As shown in Figure 2, backlight module 50 is to be located at a display panel (display panel) 40 belows, and backlight module 50 includes a shell (outer housing) 52, a plurality of mode with detachable (swappable) and is coated on light source module (light source unit) 54, within the shell 52 and is located at diffuser plate (diffusing plate) 56 and between display panel 40 and a plurality of light source module 54 and is located at light guide plate (light guide plate, LGP) 58 between diffuser plate 56 and a plurality of light source module 54.Wherein, each light source module 54 all includes at least one light source generator (light source generator) 60, and is located at the reflecting plate (reflecting sheet) 62 and of light source generator 60 belows and is located at reflecting plate 62 belows and coats inner casing (inner housing) 64 around the reflecting plate 62.
Generally speaking, a plurality of light source modules 54 are to arrange with parallel mode, and each light source generator 60 of each light source module 54 is made of a fluorescent tube (lamp), are used to provide a light source (not shown).In most preferred embodiment of the present invention, each light source generator 60 all is that (coldcathode fluorescent lamp CCFL) constitutes, and respectively this cathode fluorescent tube then is to arrange with parallel mode by a cathode fluorescent tube.Reflecting plate 62 is made of aluminum metal or other metal alloys, in order to this source reflection (reflect) that light source generator 60 is produced to light guide plate 58.In addition, reflecting plate 62 also can be made up of materials such as foaming PET film or PC resins a bottom, and the surface is formed with layer of metal or other have the reflective film that material constituted of highly reflective.Light guide plate 58 is to be used for this light source scattering (scatter) to diffuser plate 56, and diffuser plate 56 then is to be used for this light source is further scattered to display panel 40.In addition, the general at least one prism (prism) 66 that above diffuser plate 56, is provided with in addition usually, difference with further correction intensity of illumination, the light that display panel 40 is received can have an intensity of illumination distribution uniformly, and set quantity and the order of prism 66, visual product demand and being changed.
Please refer to Fig. 3 (a) and Fig. 3 (b), Fig. 3 (a) and Fig. 3 (b) be respectively among Fig. 2 shell 52 be coated on inner casing 64 in the shell 52 on look diagrammatic cross-section and side-looking diagrammatic cross-section.Shown in Fig. 3 (a), backlight module 50 includes at least one first locating device 68 and is located at a left outer wall 64b of each inner casing 64 and a right inwall 52c of shell 52, is located on the right outer wall 64c of a left inwall 52b of shell 52 and each inwall 64 with at least one second locating device 70 that corresponds to each first locating device 68.Wherein, first locating device 68 is to be used for being meshed (engage) with second locating device 70, and removably inner casing 64 is fixed within the shell 52.In most preferred embodiment of the present invention, first locating device 68 is to be a trip, and second locating device 70 then is a tongue-and-groove, shown in Fig. 3 (a).In addition, shown in Fig. 3 (b), the present invention is according to the difference of product demand, first locating device 68 also can be located on the exterior bottom wall 64a of each inner casing 64, and under this situation, 70 of corresponding second locating devices be located at shell 52 one on the diapire 52a, and the taking-up that can turn down in order to light source module 54 via a rotating shaft (hinge) 72 of a header board 52d of shell 52.In addition, (not shown) in another embodiment of the present invention, first locating device 68 among Fig. 3 (a) and Fig. 3 (b) also can be tongue-and-groove, and this moment, second locating device 70 then was a corresponding trip.
Please refer to Fig. 4 (a) and Fig. 4 (b), Fig. 4 (a) and Fig. 4 (b) are respectively in the another embodiment of the present invention, shell 52 be coated on inner casing 64 in the shell 52 on look diagrammatic cross-section and side-looking diagrammatic cross-section.Shown in Fig. 4 (a), one first locating device 68 and second locating device 70 in Fig. 3 (a), first locating device 72 among Fig. 4 (a) also is to be located on the right inwall 52c of the left outer wall 64b of each inner casing 64 and shell 52, corresponding second locating device 76 then also is located on the right outer wall 64c of the left inwall 52b of shell 52 and each inwall 64, and first locating device 74 and second locating device 76 are to interact and removably inner casing 64 is fixed within the shell 52.And shown in Fig. 4 (b), similar in appearance to Fig. 3 (b), according to product demand, first locating device 74 and second locating device 76 also can be located at respectively on the interior diapire 52a of the exterior bottom wall 64a of each inner casing 64 and shell 52, and the header board 52d of shell 52 also can turn down taking-up in order to light source module 54 via rotating shaft 72.Unique different part, then be among the figure (a) with Fig. 4 (b) in first locating device 74 be to be a slide block, corresponding second locating device 76 then is a slide rail; On the contrary, (not shown) in another embodiment of the present invention, first locating device 74 also can be a slide rail, and this moment, second locating device 76 then was a corresponding slide block.
Compared to conventional art, backlight module 50 of the present invention is to adopt a plurality of light source modules 54 that are coated on independently of one another and removably within the shell 52, and be respectively equipped with interactional first locating device 68/74 and second locating device 70/76 on the interior diapire 52a of the exterior bottom wall 64a of inner casing 64 and shell 52, therefore when the light source generator 60 of arbitrary light source module 54 breaks down, can extract the light source module 54 that comprises out of order light source generator 60 out repair or replace work very easily.In addition, this design can avoid the operator to cause weighing wounded of light guide plate 58 or reflecting plate 62 because of improper touching, so can guarantee that the display quality of display panel 40 is not affected, and keeps competitiveness of product when maintenance and replacing light source generator 60.
The above only is the preferred embodiments of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to the covering scope of patent of the present invention.
Claims (12)
1. backlight module, this backlight module are to be located at display panel below, and this backlight module comprises:
One shell;
A plurality of light source modules are coated within this shell removably, and respectively this light source module includes:
At least one light source generator is used to provide a light source;
One reflecting plate is located at this light source generator below, in order to this light source is upwards reflexed to this display panel; And
One inner casing is located at this reflecting plate below and is coated around this reflecting plate;
One diffuser plate is located between these a plurality of light source modules and this display panel, is used for this light source that this light source generator produces is scattered to this display panel;
At least one prism is located at this diffuser plate surface; And
One light guide plate is located between these a plurality of light source modules and this diffuser plate, is used for this light source that this light source generator produces is scattered to this diffuser plate.
2. backlight module as claimed in claim 1, wherein these a plurality of light source modules are to arrange with parallel mode.
3. backlight module as claimed in claim 2, wherein respectively this light source generator of this light source module is the fluorescent tube of arranging with parallel mode.
4. backlight module as claimed in claim 3, wherein respectively this fluorescent tube is a cathode fluorescent tube.
5. backlight module as claimed in claim 1, wherein this inner casing includes at least one first locating device and is located on the outer wall of this inner casing, is located on the inwall of this shell and this shell includes at least one second locating device that corresponds to this first locating device.
6. backlight module as claimed in claim 5, wherein this first locating device is to be used for being meshed with this second locating device, and fixes this inner casing removably within this shell.
7. backlight module as claimed in claim 6, wherein this first locating device is to be a trip, and this second locating device is to be a tongue-and-groove.
8. backlight module as claimed in claim 6, wherein this first locating device is to be a tongue-and-groove, and this second locating device is to be a trip.
9. backlight module as claimed in claim 6, wherein this first locating device is to be a slide rail, and this second locating device is to be a slide block.
10. backlight module as claimed in claim 6, wherein this first locating device is to be a slide block, and this second locating device is to be a slide rail.
11. backlight module as claimed in claim 1, wherein this reflecting plate is to include a sheet metal or an alloy sheets.
12. as the backlight module of claim 11, wherein this sheet metal is to be an aluminium sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03104473 CN1265236C (en) | 2003-02-17 | 2003-02-17 | Backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03104473 CN1265236C (en) | 2003-02-17 | 2003-02-17 | Backlight module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1523421A true CN1523421A (en) | 2004-08-25 |
| CN1265236C CN1265236C (en) | 2006-07-19 |
Family
ID=34282226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03104473 Expired - Fee Related CN1265236C (en) | 2003-02-17 | 2003-02-17 | Backlight module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1265236C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428022C (en) * | 2006-01-04 | 2008-10-22 | 瀚宇彩晶股份有限公司 | Replaceable backlight and LCD |
| CN100432747C (en) * | 2006-02-08 | 2008-11-12 | 中华映管股份有限公司 | Back lighting module and lighting mixed module there of |
| CN100468161C (en) * | 2006-01-21 | 2009-03-11 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN102330922A (en) * | 2010-11-04 | 2012-01-25 | 友达光电股份有限公司 | Light source and backlight module with same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048217A (en) * | 2014-06-24 | 2014-09-17 | 深圳市华星光电技术有限公司 | Direct-type backlight module and liquid crystal display device |
-
2003
- 2003-02-17 CN CN 03104473 patent/CN1265236C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100428022C (en) * | 2006-01-04 | 2008-10-22 | 瀚宇彩晶股份有限公司 | Replaceable backlight and LCD |
| CN100468161C (en) * | 2006-01-21 | 2009-03-11 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN100432747C (en) * | 2006-02-08 | 2008-11-12 | 中华映管股份有限公司 | Back lighting module and lighting mixed module there of |
| CN102330922A (en) * | 2010-11-04 | 2012-01-25 | 友达光电股份有限公司 | Light source and backlight module with same |
| CN102330922B (en) * | 2010-11-04 | 2013-12-18 | 友达光电股份有限公司 | Light source and backlight module with same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1265236C (en) | 2006-07-19 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060719 Termination date: 20210217 |
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| CF01 | Termination of patent right due to non-payment of annual fee |