CN201242643Y - Backlight module unit - Google Patents
Backlight module unit Download PDFInfo
- Publication number
- CN201242643Y CN201242643Y CNU2008201517710U CN200820151771U CN201242643Y CN 201242643 Y CN201242643 Y CN 201242643Y CN U2008201517710 U CNU2008201517710 U CN U2008201517710U CN 200820151771 U CN200820151771 U CN 200820151771U CN 201242643 Y CN201242643 Y CN 201242643Y
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- China
- Prior art keywords
- light
- light source
- backlight module
- module backlight
- guide plate
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Abstract
The utility model discloses a backlight module which comprises a back plate, a plurality of first light sources arranged on the back plate side by side, and diffusion pieces positioned at the upper sides of the first light sources; wherein light guiding plates are arranged between the first light sources and the diffusion pieces; each light guiding plate comprises at least a light incident surface, and a second light source is arranged at one side of the light incident surface. The backlight module combines the prior sidelight type backlight module structure and the direct downward type backlight module structure, which can reduce the thickness of the backlight module and increasing light ray utilization ratio.
Description
Technical field
The utility model relates to a kind of module backlight, relates in particular to a kind of backlight liquid crystal display module that is used for.
Background technology
LCD (LCD) is to utilize the variation that is clipped in electric field intensity on the liquid crystal molecule, and the power that changes the orientation control printing opacity of liquid crystal molecule is come display image.In general, a complete display panels must and be filled in two layer of liquid crystal molecule formations between the substrate by module backlight, polaroid, TFT (thin film transistor (TFT)) infrabasal plate and CF (color filter) upper substrate.Display panels itself can not be luminous, need provide light source by module backlight.Module backlight is made up of backboard, light source, diffuser plate, various blooming piece usually, and wherein light source comprises cold cathode fluorescent lamp (CCFL), LED etc.
Present module backlight is according to unusual straight-down negative and the side-light type of being divided in the position of light source.The side-light type back light module unit structure comprises the light source 11 that is positioned at module one side backlight, reflector plate 20 as shown in Figure 1, light guide plate 30, diffusion sheet 40 and prismatic lens 50, the light that light source 11 emits is converted to area source by light guide plate 30 with line source, to reach brightness and uniformity coefficient requirement.There is technology simple, advantage such as volume is frivolous, but light utilization is lower.Direct-light-type backlight as shown in Figure 2, comprising the light source 12 that is positioned at module backlight bottom, play the backboard 70 of fixed support effect, diffuser plate 60 and diffusion sheet 40, direct-light-type backlight light utilization height, but directly-down light source 12 luminous meetings form the staggered zone of light and shade, therefore need mist degree higher diffuser plate 60 and bigger lamp box distance H to solve this problem, have increased the thickness of module backlight.
The utility model content
Technical problem to be solved in the utility model provides a kind of module backlight, can improve light utilization, again can attenuate module thickness.
The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of module backlight, comprise backboard, a plurality of first light sources that are arranged side by side on this backboard, and the diffusion sheet that is positioned at the first light source upside, be provided with light guide plate between wherein said first light source and the diffusion sheet, described light guide plate comprises at least one incidence surface, and this incidence surface one side is provided with secondary light source.
In the above-mentioned module backlight, described light guide plate comprises two incidence surfaces and a bottom surface, and described bottom surface is provided with the site.
In the above-mentioned module backlight, described site becomes close by bottom center gradually toward both sides.
The utility model contrast prior art has following beneficial effect: the utility model combines existing side-light type and down straight aphototropism mode set structure, by adopting light guide plate to replace the diffuser plate of existing down straight aphototropism mode set, and secondary light source is set in incidence surface one side of light guide plate, brought into play the advantage of two kinds of structures: 1, light guide plate light that secondary light source is injected is derived from the front, improve back light source brightness, alleviated the uneven degree of demonstration.Show that uneven light and heavy degree closes luminance brightness differential threshold existence with human eye.According to the formula K=Δ I/I of human eye to luminance brightness resolution threshold, Δ I is the difference value of light and shade brightness, and I is a background luminance, and human eye will be observed the phenomenon of light and shade inequality when K surpasses certain value.Under the constant situation of light and shade difference, promptly Δ I is constant, and background luminance I increases, thus K value reduce, so eye-observation to demonstration inequality degree will alleviate.2. showing that uneven degree alleviates just can allow the lamp box distance H dwindle, the further attenuate of module thickness.3. lamp box can be so that brightness improves apart from dwindling, and light utilization improves.Simultaneously can be by to the arranging of the site of light guide plate, module backlight both sides luminous energy is provided by secondary light source, and first light source then can be drawn close to the centre, improves center brightness.
Description of drawings
Fig. 1 is the structural representation of existing side-light type module backlight.
Fig. 2 is the structural representation of existing down straight aphototropism mode set.
Fig. 3 is the structural representation of the module backlight of the utility model embodiment.
Fig. 4 is another structural representation of the module backlight of the utility model embodiment.
Among the figure,
11 light sources, 12 light sources
21 first light sources, 22 secondary light sources, 23 reflex housings
20 reflector plates, 30 light guide plate, 31 incidence surfaces
32 bottom surfaces, 33 exiting surfaces
40 diffusion sheets, 50 prismatic lenses
60 diffuser plates, 70 backboards
Embodiment
The utility model will be further described below in conjunction with drawings and Examples.
Fig. 3 is the structural representation of the module backlight of the utility model embodiment.
Please refer to Fig. 3, module backlight of the present utility model comprises the backboard 70 that play fixed supporting role, a plurality of first light sources 21 that are arranged side by side on this backboard 70, and the diffusion sheet 40 that is positioned at first light source, 21 upsides, be provided with light guide plate 30 between described first light source 21 and the diffusion sheet 40, two incidence surfaces 31 about described light guide plate 30 comprises, one bottom surface 32 and an exiting surface 33, described incidence surface 31 links to each other with bottom surface 32, described exiting surface 33 is relative with bottom surface 32, be printed with the site (not shown) on the described bottom surface 32, the side of described two incidence surfaces 31 is respectively arranged with secondary light source 22, described incidence surface 31 is used to receive the light beam that the secondary light source 22 from its side sends, this light beam is derived with the reflection back even emitted light beams of formation and by exiting surface 33 through the scattering of bottom surface 32, be converted to area source by light guide plate 30, described first light source, 21 emitted light beams are distributed to display panels uniformly through pass through the further scattering of diffusion sheet 40 after the scattering of light guide plate 30 together with secondary light source 22 emitted light beams.
In order to improve light utilization, the arranged outside of described secondary light source 22 has reflex housing 23, the two ends of reflex housing 23 are separately fixed at the two ends up and down of incidence surface 31, be used for the light of secondary light source 22 outsides emission is reflected into light guide plate 30 again, described backboard 70 can be made by materials such as SECC (galvanized steel plain sheet), aluminium, described first light source 21, secondary light source 22 can be CCFL (cold-cathode fluorescence lamp) fluorescent tube or LED lamp bar lamp, and described diffusion sheet 40 can be made by PMMA (polymethyl methyl esters) material.
Fig. 4 is another structural representation of the module backlight of the utility model embodiment.
Please refer to Fig. 4, described first light source 21 can be concentrated to the centre, and the center briliancy is improved, and takes into account homogeneity simultaneously again.
The utility model combines existing side-light type and down straight aphototropism mode set structure, and the light that secondary light source 22 sends enters whole light-emitting zone by light guide plate 30, again by suitable net-point printing by the even outgoing in front.The adding of secondary light source 22 just is equivalent to improve whole background luminance, and under the constant situation of light and shade difference, promptly Δ I is constant, and background luminance I increases, so K value reduces, so eye-observation will alleviate to the uneven degree of demonstration.Under the situation that satisfies the brightness homogeneity, can dwindle the lamp box distance H, attenuate module thickness backlight further improves light utilization.
Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.
Claims (4)
1. module backlight, comprise backboard, a plurality of first light sources that are arranged side by side on this backboard, and the diffusion sheet that is positioned at the first light source upside, it is characterized in that, be provided with light guide plate between described first light source and the diffusion sheet, described light guide plate comprises at least one incidence surface, and this incidence surface one side is provided with secondary light source.
2. module backlight according to claim 1 is characterized in that, described a plurality of first light sources are positioned at the centre position of described backboard.
3. module backlight according to claim 1 is characterized in that, described light guide plate comprises two incidence surfaces and a bottom surface, and described bottom surface is provided with the site, and these two incidence surface one sides are provided with secondary light source.
4. module backlight according to claim 3 is characterized in that, described site becomes close by bottom center gradually toward both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201517710U CN201242643Y (en) | 2008-08-11 | 2008-08-11 | Backlight module unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201517710U CN201242643Y (en) | 2008-08-11 | 2008-08-11 | Backlight module unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201242643Y true CN201242643Y (en) | 2009-05-20 |
Family
ID=40715932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201517710U Expired - Fee Related CN201242643Y (en) | 2008-08-11 | 2008-08-11 | Backlight module unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201242643Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093390A (en) * | 2015-08-12 | 2015-11-25 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN107002980A (en) * | 2014-05-15 | 2017-08-01 | 罗茵尼公司 | The light diffusion of light generating source |
| CN109407400A (en) * | 2018-11-23 | 2019-03-01 | 深圳Tcl新技术有限公司 | Down straight aphototropism mode set and display equipment |
| CN110488531A (en) * | 2018-05-15 | 2019-11-22 | 青岛海信电器股份有限公司 | A kind of backlight module and liquid crystal display device |
-
2008
- 2008-08-11 CN CNU2008201517710U patent/CN201242643Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107002980A (en) * | 2014-05-15 | 2017-08-01 | 罗茵尼公司 | The light diffusion of light generating source |
| CN107002980B (en) * | 2014-05-15 | 2020-07-17 | 罗茵尼公司 | Light diffusion of light generating sources |
| CN105093390A (en) * | 2015-08-12 | 2015-11-25 | 京东方科技集团股份有限公司 | Backlight module and display device |
| US10007051B2 (en) | 2015-08-12 | 2018-06-26 | Boe Technology Group Co., Ltd. | Backlight module and display device |
| CN105093390B (en) * | 2015-08-12 | 2019-01-04 | 京东方科技集团股份有限公司 | Backlight module and display device |
| CN110488531A (en) * | 2018-05-15 | 2019-11-22 | 青岛海信电器股份有限公司 | A kind of backlight module and liquid crystal display device |
| CN109407400A (en) * | 2018-11-23 | 2019-03-01 | 深圳Tcl新技术有限公司 | Down straight aphototropism mode set and display equipment |
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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: 20090520 Termination date: 20100811 |