CN202274346U - Direct illumination-type laser backlight module and display thereof - Google Patents
Direct illumination-type laser backlight module and display thereof Download PDFInfo
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- CN202274346U CN202274346U CN2011201377670U CN201120137767U CN202274346U CN 202274346 U CN202274346 U CN 202274346U CN 2011201377670 U CN2011201377670 U CN 2011201377670U CN 201120137767 U CN201120137767 U CN 201120137767U CN 202274346 U CN202274346 U CN 202274346U
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Abstract
The utility model provides a laser backlight module and a display thereof; wherein the backlight module is arranged in areas; the backlight module of the each area comprises a laser module, a laser beam expander, and a diffuser plate; the laser module is arranged at a bottom, the laser beam expander is arranged on the laser module and used for amplifying a laser which is emitted by the laser module and has a small light beam; and the diffuser plate is arranged over the laser beam expander and used for uniformly scattering parallel lights coming from the laser beam expander.
Description
Technical field
The utility model relates to light-emitting component and liquid crystal indicator, and more specifically, the utility model relates to a kind of straight-down negative laser backlight module and display of local dimming.
Background technology
Fast development along with computer industry; Consumer electronics such as mobile phone, digital camera, portable notebook, panel computer all develop towards direction multi-functional, attractive in appearance; Wherein, As requisite display interface,, also bring great convenience for the operator as the media of man-machine interaction.The display screen of present various consumer electronics is display panels mostly; And display panels itself does not have lighting function; Backlight module thereunder must be set to provide liquid crystal panel required area source; Make liquid crystal panel have display effect, obtain enough brightness and contrasts simultaneously.
Existing backlight module is divided into two kinds of marginal mode and straight-down negatives, and wherein, marginal mode need convert line source into area source through LGP (LGP), and straight-down negative need not to dispose LGP required area source can be provided directly.The area source that present straight-down negative is provided comprises dual mode, and a kind of is to be arranged by a plurality of cold-cathode fluorescence lamps (CCFL) to constitute, and another kind is to be arranged with array way by a plurality of light emitting diodes (LED) to constitute.For light source is the arrangement of CCFL, and its light characteristic is actinoid dispersing, and bright dipping does not have special directionality.And be the arrangement of LED for light source, do not have approximately parallel light direction property equally, and the mixed light poor effect of diode.
Fig. 1 illustrates the direct-light type LED backlight module local dimming schematic layout pattern of prior art, and as shown in Figure 1, the LED of a plurality of arrayed is positioned at below the display floater, and a plurality of LED come driven for emitting lights through control circuit, and the led array subregion is arranged.
Fig. 2 illustrates the side type LED-backlit module local dimming schematic layout pattern of prior art, and shown in Fig. 2, the LED of a plurality of arrayed is positioned at a side of display floater; Additional control circuit comes driven for emitting lights in the outside of LED; Use the light emitting diode of different color light, after light is mixed white area source be provided since the led light source lighting angle be approximately ± 50 degree about; Need plurality of LEDs closely to arrange and just can reach even block light output, relative cost is higher.
The utility model content
For overcoming existing defective, the utility model proposes a kind of laser backlight module and LCD of local dimming.
According to an aspect of the utility model, a kind of straight-down negative laser backlight module has been proposed, wherein; Mould splits area arrangements backlight is characterized in that, the module backlight in each zone comprises laser module, laser beam expander and diffuser plate; Laser module is arranged in the bottom; Arrange laser beam expander on it, the less laser of the light beam that laser beam expander sends laser module amplifies, and said laser beam expander is directional light beam expander or diaphragm; Diffuser plate is arranged in the top of laser beam expander, will be from the even scattering of the directional light of laser beam expander, and each laser module comprises base and laser generator, laser generator is arranged on the base.
Directional light beam expander or diaphragm are used for strengthening the parallel laser light beam quality that laser module produces, and enlarge the area that effectively is incident in diffuser plate.
Laser beam expander comprises two lens, the assembling less than the focus away from 2, two lens of focal distance f of second lens of laser module near the focal distance f 1 of first lens of laser module of this two lens; The width of light beam of the incident light of first lens is d1, and the width of light beam of the emergent light of second lens is d2, and the arrangement relation of two lens is:
Diffuser plate can also comprise one of them of brightening piece and prismatic lens, and wherein, brightening piece is used for promoting the brightness that module backlight appears, and prismatic lens is lifted out the correctness of light direction.
Laser generator is arranged over against the direction of laser beam expander with light direction; Each laser module is connected with control module at the back, and it is luminous to be used for drive laser.
According to the utility model on the other hand, propose a kind of display, comprised LCDs and straight-down negative laser backlight module; Wherein, mould splits area arrangements backlight is characterized in that; The module backlight in each zone comprises laser module, laser beam expander and diffuser plate, and laser module is arranged in the bottom, arranges laser beam expander on it; The less laser of the light beam that laser beam expander sends laser module amplifies, and said laser beam expander is directional light beam expander or diaphragm; Each laser module comprises base and laser generator, and laser generator is arranged on the base; Diffuser plate is arranged in the top of laser beam expander, will be from the even scattering of the directional light of laser beam expander.
Directional light beam expander or diaphragm are used for strengthening the parallel laser light beam quality that laser module produces, and enlarge the area that effectively is incident in diffuser plate.
Laser beam expander comprises two lens, the assembling less than the focus away from 2, two lens of focal distance f of second lens of laser module near the focal distance f 1 of first lens of laser module of this two lens; The width of light beam of the incident light of first lens is d1, and the width of light beam of the emergent light of second lens is d2, and the arrangement relation of two lens is:
Diffuser plate can also comprise one of them of brightening piece and prismatic lens, and wherein, brightening piece is used for promoting the brightness that module backlight appears, and prismatic lens is lifted out the correctness of light direction.
Laser generator is arranged over against the direction of laser beam expander with light direction; Each laser module is connected with control module at the back, and it is luminous to be used for drive laser.
The utility model utilizes very little specific of high collimation bright dipping and the light beam of LASER Light Source, realizes the effect of local uniform bright dipping, cooperates local control to promote efficient and display quality.
Description of drawings
Fig. 1 illustrates the direct-light type LED backlight module local dimming schematic layout pattern of prior art;
Fig. 2 illustrates the side type LED-backlit module local dimming schematic layout pattern of prior art;
Fig. 3 A illustrates laser beam expander, and Fig. 3 B illustrates the straight-down negative laser backlight module local dimming schematic layout pattern according to the utility model first embodiment;
Fig. 4 illustrates the side type laser backlight module local dimming schematic layout pattern according to second embodiment of the utility model.
As shown in the figure; In order clearly to realize the structure of the embodiment of the utility model, marked specific structure and device in the drawings, but this is merely the signal needs; Be not that intention is limited to the utility model in this ad hoc structure, device and the environment; According to concrete needs, those of ordinary skill in the art can adjust these devices and environment or revise, and adjustment of being carried out or modification still are included in the scope of accompanying Claim.
The specific embodiment
The laser backlight module and the LCD of a kind of local dimming that the utility model is provided below in conjunction with accompanying drawing and specific embodiment are described in detail.
In the following description, with a plurality of different aspect of describing the utility model, yet, for the one of ordinary skilled in the art, can only utilize some or the entire infrastructure of the utility model or flow process to implement the utility model.For the definition of explaining, set forth specific number, configuration and order, but clearly, do not had also can to implement the utility model under the situation of these specific detail.In other cases, in order not obscure the utility model, will set forth no longer in detail for some well-known characteristics.
Fig. 3 illustrates the straight-down negative laser backlight module local dimming schematic layout pattern according to the utility model first embodiment; Shown in Fig. 3 B; Mould splits area arrangements backlight, the module backlight in each zone comprises laser module, laser beam expander (or diaphragm) and diffuser plate, laser module is arranged in the bottom; Arrange laser beam expander on it; The less laser of light beam that laser beam expander (or diaphragm) is used for laser module is sent amplifies, and diffuser plate is arranged in the top of laser beam expander, is used for the directional light scattering more equably from laser beam expander (or diaphragm).
Wherein, The laser module emitted light beams generally between 1mm between the 2mm, if will be used as radiation source, just must laser beam be amplified with laser; Wherein use directional light beam expander (or diaphragm) to strengthen Laser parallel light beam quality, and enlarge the area that it effectively is incident in diffuser plate.Diffuser plate makes incident light reach local uniform in the straight-down negative framework to go out light effect, cooperates local control to promote efficient and display quality.
Shown in Fig. 3 A; Laser beam expander (or diaphragm) uses two lens, these two lens be d1 near the focal distance f 1 of the first lens L1 of laser module less than width of light beam away from the incident light of focal distance f 2, the first lens of the second lens L2 of laser module; The width of light beam of the emergent light of second lens is d2; Wherein, the focus of two lens is assembled, and the arrangement relation of two lens needs:
Diffuser plate can also comprise one of them of brightening piece and prismatic lens, and wherein, brightening piece can be used to promote the brightness that module backlight appears, and prismatic lens can be lifted out the correctness of light direction.Select above-mentioned diaphragm for use according to the required optical effect that appears.
Each laser module comprises base and laser generator, and laser generator is arranged on the base.Laser generator is arranged over against the direction of laser beam expander (or diaphragm) with light direction.Each laser module is connected with control module at the back, and it is luminous to be used for drive laser.
Fig. 4 illustrates the side type module local dimming backlight schematic layout pattern according to second embodiment of the utility model; As shown in Figure 4; Mould splits area arrangements backlight is in a side of display floater, and this side comprises upper and lower sides or left and right sides, and the bottom of display floater is arranged LGP (LGP); The module backlight in each zone comprises laser module, laser beam expander (or diaphragm) and diffuser plate; Laser module is arranged in the bottom of module backlight, arranges on it that less laser of light beam that laser beam expander, laser beam expander are used for laser module is sent amplifies; Diffuser plate is arranged in the top of laser beam expander, is used for the directional light scattering more equably from laser beam expander (or diaphragm).
Wherein, The laser module emitted light beams generally between 1mm between the 2mm, if will be used as radiation source, just must laser beam be amplified with laser; Wherein use directional light beam expander (or diaphragm) to strengthen Laser parallel light beam quality, and enlarge the area that it effectively is incident in diffuser plate.Diffuser plate makes incident light reach local uniform in the straight-down negative framework to go out light effect, cooperates local control to promote efficient and display quality.
Laser beam expander uses two lens; These two lens near the focal distance f 1 of the first lens L1 of laser module less than focal distance f 2 away from the second lens L2 of laser module; The width of light beam of the incident light of first lens is d1, and the width of light beam of the emergent light of second lens is d2, wherein; The focus of two lens is assembled, and the arrangement relation of two lens needs:
Diffuser plate can also comprise one of them of brightening piece and prismatic lens, and wherein, brightening piece can be used to promote the brightness that module backlight appears, and prismatic lens can be lifted out the correctness of light direction.Select above-mentioned diaphragm for use according to the required optical effect that appears.
Each laser module comprises base and laser generator, and laser generator is arranged on the base.Laser generator is arranged over against the direction of laser beam expander (or diaphragm) with light direction.Each laser module is connected with control module at the back, and it is luminous to be used for drive laser.
For marginal mode, that LGP is used for laser instrument is produced, become area source through the laser line light source of diffuser plate scattering, to be used for display floater.
In the 3rd embodiment according to the utility model, a kind of display is provided, this display comprises LCDs and module backlight; For this display, comprise LCD and straight-down negative laser backlight module, mould splits area arrangements backlight; The module backlight in each zone comprises laser module, laser beam expander (or diaphragm) and diffuser plate; Laser module is arranged in the bottom, arranges on it that less laser of light beam that laser beam expander, laser beam expander (or diaphragm) are used for laser module is sent amplifies; Diffuser plate is arranged in the top of laser beam expander (or diaphragm), is used for the directional light scattering more equably from the laser beam expander.
Wherein, The laser module emitted light beams generally between 1mm between the 2mm, if will be used as radiation source, just must laser beam be amplified with laser; Wherein use directional light beam expander (or diaphragm) to strengthen Laser parallel light beam quality, and enlarge the area that it effectively is incident in diffuser plate.Diffuser plate makes incident light reach local uniform in the straight-down negative framework to go out light effect, cooperates local control to promote efficient and display quality.
Laser beam expander uses two lens; These two lens near the focal distance f 1 of the first lens L1 of laser module less than focal distance f 2 away from the second lens L2 of laser module; The width of light beam of the incident light of first lens is d1, and the width of light beam of the emergent light of second lens is d2, wherein; The focus of two lens is assembled, and the arrangement relation of two lens needs:
Diffuser plate can also comprise one of them of brightening piece and prismatic lens, and wherein, brightening piece can be used to promote the brightness that module backlight appears, and prismatic lens can be lifted out the correctness of light direction.Select above-mentioned diaphragm for use according to the required optical effect that appears.Each laser module comprises base and laser generator, and laser generator is arranged on the base.Laser generator is arranged over against the direction of laser beam expander (or diaphragm) with light direction.Each laser module is connected with control module at the back, and it is luminous to be used for drive laser.
In the 4th embodiment according to the utility model, a kind of display is provided, this display comprises LCDs and module backlight; For this display, comprise LCD and marginal mode laser backlight module, mould splits area arrangements backlight is in a side of display floater; This side comprises upper and lower sides or left and right sides; The bottom of display floater is arranged LGP (LGP), and the module backlight in each zone comprises laser module, laser beam expander (or diaphragm) and diffuser plate, and laser module is arranged in the bottom of module backlight; Arrange laser beam expander (or diaphragm) on it; The less laser of light beam that laser beam expander (or diaphragm) is used for laser module is sent amplifies, and diffuser plate is arranged in the top of laser beam expander, is used for the directional light scattering more equably from laser beam expander (or diaphragm).
Wherein, The laser module emitted light beams generally between 1mm between the 2mm, if will be used as radiation source, just must laser beam be amplified with laser; Wherein use directional light beam expander (or diaphragm) to strengthen Laser parallel light beam quality, and enlarge the area that it effectively is incident in diffuser plate.Diffuser plate makes incident light reach local uniform in the straight-down negative framework to go out light effect, cooperates local control to promote efficient and display quality.
Laser beam expander (or diaphragm) uses two lens; These two lens near the focal distance f 1 of the first lens L1 of laser module less than focal distance f 2 away from the second lens L2 of laser module; The width of light beam of the incident light of first lens is d1, and the width of light beam of the emergent light of second lens is d2, wherein; The focus of two lens is assembled, and the arrangement relation of two lens needs:
Diffuser plate can also comprise one of them of brightening piece and prismatic lens, and wherein, brightening piece can be used to promote the brightness that module backlight appears, and prismatic lens can be lifted out the correctness of light direction.Select above-mentioned diaphragm for use according to the required optical effect that appears.Each laser module comprises base and laser generator, and laser generator is arranged on the base.Laser generator is arranged over against the direction of laser beam expander (or diaphragm) with light direction.Each laser module is connected with control module at the back, and it is luminous to be used for drive laser.
For marginal mode, that LGP is used for laser instrument (or diaphragm) is produced, become area source through the laser line light source of diffuser plate scattering, to be used for display floater.
What should explain at last is; Above embodiment only limits in order to the technical scheme of description the utility model rather than to the present technique method; The utility model can extend to other modification, variation, application and embodiment on using, and therefore thinks that all such modifications, variation, application, embodiment are in the spirit and teachings of the utility model.
Claims (10)
1. straight-down negative laser backlight module, wherein, mould splits area arrangements backlight; It is characterized in that; The module backlight in each zone comprises laser module, laser beam expander and diffuser plate, and laser module is arranged in the bottom, arranges laser beam expander on it; The less laser of the light beam that laser beam expander sends laser module amplifies, and said laser beam expander is directional light beam expander or diaphragm; Diffuser plate is arranged in the top of laser beam expander, will be from the even scattering of the directional light of laser beam expander, and each laser module comprises base and laser generator, laser generator is arranged on the base.
2. laser backlight module according to claim 1 is characterized in that, directional light beam expander or diaphragm are used for strengthening the parallel laser light beam quality that laser module produces, and enlarges the area that effectively is incident in diffuser plate.
3. laser backlight module according to claim 1; It is characterized in that; Laser beam expander comprises two lens, the assembling less than the focus away from 2, two lens of focal distance f of second lens of laser module near the focal distance f 1 of first lens of laser module of this two lens; The width of light beam of the incident light of first lens is d1, and the width of light beam of the emergent light of second lens is d2, and the arrangement relation of two lens is:
4. laser backlight module according to claim 1 is characterized in that diffuser plate can also comprise one of them of brightening piece and prismatic lens, and wherein, brightening piece is used for promoting the brightness that module backlight appears, and prismatic lens is lifted out the correctness of light direction.
5. laser backlight module according to claim 1 is characterized in that, laser generator is arranged over against the direction of laser beam expander with light direction; Each laser module is connected with control module at the back, and it is luminous to be used for drive laser.
6. a display comprises LCDs and straight-down negative laser backlight module, wherein; Mould splits area arrangements backlight is characterized in that, the module backlight in each zone comprises laser module, laser beam expander and diffuser plate; Laser module is arranged in the bottom; Arrange laser beam expander on it, the less laser of the light beam that laser beam expander sends laser module amplifies, and said laser beam expander is directional light beam expander or diaphragm; Each laser module comprises base and laser generator, and laser generator is arranged on the base; Diffuser plate is arranged in the top of laser beam expander, will be from the even scattering of the directional light of laser beam expander.
7. display according to claim 6 is characterized in that, directional light beam expander or diaphragm are used for strengthening the parallel laser light beam quality that laser module produces, and enlarges the area that effectively is incident in diffuser plate.
8. display according to claim 6 is characterized in that, laser beam expander comprises two lens, the assembling less than the focus away from 2, two lens of focal distance f of second lens of laser module near the focal distance f 1 of first lens of laser module of this two lens; The width of light beam of the incident light of first lens is d1, and the width of light beam of the emergent light of second lens is d2, and the arrangement relation of two lens is:
9. display according to claim 6 is characterized in that diffuser plate can also comprise one of them of brightening piece and prismatic lens, and wherein, brightening piece is used for promoting the brightness that module backlight appears, and prismatic lens is lifted out the correctness of light direction.
10. display according to claim 6 is characterized in that, laser generator is arranged over against the direction of laser beam expander with light direction; Each laser module is connected with control module at the back, and it is luminous to be used for drive laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201377670U CN202274346U (en) | 2011-05-04 | 2011-05-04 | Direct illumination-type laser backlight module and display thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201377670U CN202274346U (en) | 2011-05-04 | 2011-05-04 | Direct illumination-type laser backlight module and display thereof |
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| Publication Number | Publication Date |
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| CN202274346U true CN202274346U (en) | 2012-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201377670U Expired - Lifetime CN202274346U (en) | 2011-05-04 | 2011-05-04 | Direct illumination-type laser backlight module and display thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767739A (en) * | 2011-05-04 | 2012-11-07 | 佛山市南海平板显示技术中心 | Direct type laser backlight module and display thereof |
| WO2014047983A1 (en) * | 2012-09-18 | 2014-04-03 | 天津天星电子有限公司 | Three-dimensionally irradiating reflector-lamp and method |
| CN104565995A (en) * | 2013-10-22 | 2015-04-29 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN111273488A (en) * | 2020-04-10 | 2020-06-12 | Tcl华星光电技术有限公司 | Backlight module and display device |
| US11112649B1 (en) | 2020-04-10 | 2021-09-07 | Tcl China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
-
2011
- 2011-05-04 CN CN2011201377670U patent/CN202274346U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102767739A (en) * | 2011-05-04 | 2012-11-07 | 佛山市南海平板显示技术中心 | Direct type laser backlight module and display thereof |
| WO2014047983A1 (en) * | 2012-09-18 | 2014-04-03 | 天津天星电子有限公司 | Three-dimensionally irradiating reflector-lamp and method |
| CN104565995A (en) * | 2013-10-22 | 2015-04-29 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN111273488A (en) * | 2020-04-10 | 2020-06-12 | Tcl华星光电技术有限公司 | Backlight module and display device |
| US11112649B1 (en) | 2020-04-10 | 2021-09-07 | Tcl China Star Optoelectronics Technology Co., Ltd. | Backlight module and display device |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120613 |