CN102767739A - Direct type laser backlight module and display thereof - Google Patents
Direct type laser backlight module and display thereof Download PDFInfo
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- CN102767739A CN102767739A CN201110113915XA CN201110113915A CN102767739A CN 102767739 A CN102767739 A CN 102767739A CN 201110113915X A CN201110113915X A CN 201110113915XA CN 201110113915 A CN201110113915 A CN 201110113915A CN 102767739 A CN102767739 A CN 102767739A
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Abstract
The invention provides a laser backlight module and a display of the laser backlight module. The backlight modules are arranged by region. Each backlight module is characterized by comprising a laser module, a laser beam expander and a diffusion plate in each region, wherein the laser module is arranged on the bottom; the laser beam expander for expanding the smaller laser of the light beam sent by the laser module is arranged above the laser module; and the diffusion plate for uniformly scattering the parallel light from the laser beam expander is arranged above the laser beam expander.
Description
Technical field
The present invention relates to light-emitting component and liquid crystal indicator, more specifically, the present invention 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 as shown in Figure 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.
Summary of the invention
For overcoming existing defective, the present invention proposes a kind of laser backlight module and LCD of local dimming.
According to an aspect of the present invention, a kind of straight-down negative laser backlight module has been proposed, 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, 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; 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.
According to a further aspect in the invention; Proposed a kind of side type laser backlight module, mould splits area arrangements backlight is in a side of display floater, and the bottom of display floater is arranged LGP; Each zone of module backlight comprises laser module, laser beam expander 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, will be from the directional light scattering more equably of laser beam expander.
According to a further aspect in the invention, propose a kind of display, comprised LCDs and side type laser backlight module; Mould splits area arrangements backlight is in a side of display floater; The bottom of display floater is arranged LGP, and each zone of module backlight comprises laser module, laser beam expander and diffuser plate, and laser module is arranged in the bottom of module backlight; Arrange laser beam expander on it, the less laser of light beam that laser beam expander is used for laser module is sent amplifies; Diffuser plate is arranged in the top of laser beam expander, will be from the directional light scattering more equably of laser beam expander.
According to another aspect of the invention, 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; Laser module is arranged in the bottom, arranges laser beam expander on it, and the less laser of the light beam that laser beam expander sends laser module amplifies; 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.
The present invention 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 illustrates the straight-down negative laser backlight module local dimming schematic layout pattern according to first embodiment of the invention;
Fig. 4 illustrates side type laser backlight module local dimming schematic layout pattern according to a second embodiment of the present invention.
As shown in the figure; In order clearly to realize the structure of embodiments of the invention, marked specific structure and device in the drawings, but this is merely the signal needs; Be not that intention is limited to the present invention 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
Be described in detail below in conjunction with accompanying drawing and specific embodiment laser backlight module and LCD a kind of local dimming provided by the invention.
In the following description, with description a plurality of different aspects of the present invention, yet, for the one of ordinary skilled in the art, can only utilize perhaps entire infrastructure more of the present invention or flow process to come embodiment of the present invention.For the definition of explaining, specific number, configuration and order have been set forth, but clearly, in that do not have also can embodiment of the present invention under the situation of these specific detail.In other cases, in order not obscure the present invention, 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 first embodiment of the invention; 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 side type module local dimming backlight schematic layout pattern according to a second embodiment of the present invention, and as shown in Figure 4, 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 on it; The less laser of light beam that laser beam expander 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 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 a third embodiment in accordance with the invention, 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 a fourth embodiment in accordance with the invention, 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 is only in order to describe technical scheme of the present invention rather than the present technique method is limited; The present invention can extend to other modification, variation, application and embodiment on using, and therefore thinks that all such modifications, variation, application, embodiment are in spirit of the present invention and teachings.
Claims (10)
1. 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, arranges laser beam expander on it, and the less laser of the light beam that laser beam expander sends laser module amplifies; 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.
2. laser backlight module according to claim 1 is characterized in that said laser beam expander is directional light beam expander or diaphragm, is 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 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 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; It 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; 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 said laser beam expander is directional light beam expander or diaphragm, is 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 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 with light direction; Each laser module is connected with control module at the back, and it is luminous to be used for drive laser.
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| CN201110113915XA CN102767739A (en) | 2011-05-04 | 2011-05-04 | Direct type laser backlight module and display thereof |
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| CN201110113915XA CN102767739A (en) | 2011-05-04 | 2011-05-04 | Direct type laser backlight module and display thereof |
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Cited By (9)
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| CN103456274A (en) * | 2013-09-26 | 2013-12-18 | 国家电网公司 | Energy-saving liquid crystal display capable of being lightened partially |
| CN103591509A (en) * | 2013-11-08 | 2014-02-19 | 京东方科技集团股份有限公司 | Backlight source and display device |
| CN104100876A (en) * | 2013-04-03 | 2014-10-15 | 鸿富锦精密工业（深圳）有限公司 | Light-emitting device and backlight module |
| CN106405882A (en) * | 2016-11-21 | 2017-02-15 | 青岛海信电器股份有限公司 | Local backlight adjusting membrane, backlight module and liquid crystal display device |
| CN108153052A (en) * | 2018-01-02 | 2018-06-12 | 京东方科技集团股份有限公司 | Backlight module and liquid crystal display device |
| WO2018228115A1 (en) * | 2017-06-16 | 2018-12-20 | 京东方科技集团股份有限公司 | Light source assembly, backlight module and display device |
| CN110262129A (en) * | 2019-06-19 | 2019-09-20 | 合肥工业大学 | A kind of backlight module and its liquid crystal display of application |
| CN111458931A (en) * | 2020-04-02 | 2020-07-28 | 河南百合特种光学研究院有限公司 | High-brightness backlight source module based on L D pump fluorescent crystal |
| CN111812887A (en) * | 2019-04-11 | 2020-10-23 | 合肥工业大学 | A kind of laser backlight module and its application liquid crystal display |
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| CN111458931A (en) * | 2020-04-02 | 2020-07-28 | 河南百合特种光学研究院有限公司 | High-brightness backlight source module based on L D pump fluorescent crystal |
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Application publication date: 20121107 |