CN101702063B - Laser backlight liquid crystal display (LCD) system - Google Patents
Laser backlight liquid crystal display (LCD) system Download PDFInfo
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- CN101702063B CN101702063B CN2009102308177A CN200910230817A CN101702063B CN 101702063 B CN101702063 B CN 101702063B CN 2009102308177 A CN2009102308177 A CN 2009102308177A CN 200910230817 A CN200910230817 A CN 200910230817A CN 101702063 B CN101702063 B CN 101702063B
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Abstract
The invention provides a laser backlight liquid crystal display (LCD) system which comprises a laser source with three primary colors, a light combination system, dot line light source switching system(s), a backlight plate, a liquid crystal plate and a signal receiving and processing drive system, wherein the light combination system is positioned between the laser source and the dot line light source switching system(s), the dot line light source switching system(s) is/are positioned at one or two side(s) of the backlight plate, the liquid crystal plate is positioned on the backlight plate, and the liquid crystal plate is connected with the signal receiving and processing drive system. By adopting the laser with the three primary colors, high brightness and good monochromaticity as the backlight, and the liquid crystal plate without a colored filter film, the system can realize the laser sequential display way by controlling the sequential luminescence of a laser with the three colors by timing sequence, and utilizes the characteristic of persistence of vision of human eyes to realize time color mixture, thus greatly expanding the displayed color gamut, and improving the optical energy utilization rate and the space resolution rate; furthermore, as the front of the liquid crystal plate is stuck with a view field angle expanded film, the view field can be expanded.
Description
Technical field
The present invention relates to a kind of laser backlight liquid crystal display (LCD) system, belong to the laser display technology field.
Background technology
At present, LCD (LCD) development is widely used in flat pannel display fields such as LCD TV, notebook computer, mobile phones rapidly, has come into huge numbers of families.This comes from the multiple advantage of LCD: radiationless, energy consumption is little, heat radiation is little, frivolous, be easy to carry etc.Cold cathode fluorescent tube (the being CCFL) backlight that conventional liquid crystal adopts has the following disadvantages: contain a spot of mercury in (one) cold cathode fluorescent tube, do not meet environmental protection standard; (2) light leakage phenomena is commonplace, the cold-starting difficulty, and the response time is longer; (3) contain color filter film in the liquid crystal board, projecting backlight on the liquid crystal board is white light, need to adopt and spacing color mixedly just can demonstrate coloured image through color filter film, colour gamut is littler than CRT, generally can only reach 72% of NTSC gamut standards, caused not only like this that the efficiency of light energy utilization is low, spatial resolution is low, and colour gamut is little, color saturation is low, the color that presents is also abundant inadequately.
Along with the fast development of LED technology, adopt the liquid crystal display device development in recent years in LED-backlit source very fast, it is expected to replace the liquid crystal display device of traditional employing CCFL light source.The most significant advantage in LED-backlit source is can enlarge color reducibility and have high-contrast.By LED that selects suitable wave band and the color filter film that is complementary with it, color rendition scope in LED-backlit source can reach more than 105% even 120% of NTSC gamut standards.But also there is its shortcoming in the LED-backlit source: (one) its brightness is not high enough, needs a plurality of LED, and power consumption is also bigger, and color presents scope and compares very big gap in addition with laser; (2) still adopt liquid crystal board and the spacing color mixed method that contains color filter film, spatial resolution is not high, and the efficiency of light energy utilization is low.
Laser has characteristics such as brightness height, monochromaticity be good.Utilize red-green-blue laser as backlight, the gamut range that can further expand liquid crystal display is realized panchromatic demonstration (reaching more than 170% of NTSC gamut standards); Adopt the liquid crystal board of netrual colour filter coating, luminous by sequential control three look laser instruments order, as to utilize human eye eye storage characteristic is realized the time colour mixture, can improve the efficiency of light energy utilization and spatial resolution.
Summary of the invention
The present invention is in order to overcome the deficiency that the available liquid crystal display technique exists, and provides that a kind of gamut range is big, color saturation is high, can improve the laser backlight liquid crystal display (LCD) system of the efficiency of light energy utilization and spatial resolution.
Laser backlight liquid crystal display (LCD) system of the present invention adopts following technical scheme:
This laser backlight liquid crystal display (LCD) system, the signal reception processing drive system that comprises the tricolor laser light source and close photosystem, some line source converting system, backlight, liquid crystal board and liquid crystal board, close photosystem between LASER Light Source and some line source converting system, point line source converting system is positioned at the one or both sides of backlight, liquid crystal board is on backlight, liquid crystal board receives the processing drive system with its signal and is connected, and red-green-blue LASER Light Source ECDC photosystem synthesizes a branch of standard white light; The standard white light converts line or column source to lateral emitting with certain-length to through a line source converting system and is imported into backlight; Light beam becomes evenly backlight in light guide plate; From the even backlighted liquid crystal board of backlight front side outgoing, signal accepts to handle drive system by each pixel of vision signal control liquid crystal board that receives, and the sequential control tricolor laser device order of pressing red, green, blue trichromatic vision frequency signal loading simultaneously is luminous.
Described tricolor laser light source comprises three laser instruments of red, green, blue, and three laser instruments are luminous by certain sequential control order, and output power can be controlled respectively.
The described photosystem that closes adopts X type prism to close photosystem, comprise an X type light-combining prism and two catoptrons, X type light-combining prism is realized the synthetic a branch of standard white light of tricolor laser, and two catoptrons are single wavelength deielectric-coating high reflection mirrors of difference reflect red, green laser.Close photosystem and also can adopt dichroic mirror to close photosystem, comprise an anti-green red dichroic mirror and an anti-blue saturating red green dichroic mirror, this two dichroic mirror can be with the synthetic a branch of standard white light of tricolor laser device.
Described some line source converting system comprises catoptron, beam splitter, beam expanding lens and fine lamp guide, and catoptron is a broadband deielectric-coating high reflection mirror, realizes the light beam deviation; Beam splitter is realized beam split by a certain percentage by reflection and transmission; Beam expanding lens is the aplanasia biconcave lens, light beam is transformed into the divergent beams with certain pore size angle; Fine lamp guide is cylindrical lamp guide, and its inside is distributed with scattering particles, and its half side-view is coated with highly reflecting films, and an end embeds the anti-type optical device that spreads out with special face structure.The effect of some line source converting system is to convert the narrow laser beam from laser emitting to certain-length line or column source to lateral emitting.Enter fine lamp guide from the divergent beams with certain pore size angle of beam expanding lens outgoing, portion is through end face and offside reflection, form line (post) light source to side-emitted through the scattering particles scattering within it.
Described backlight, the backlight in its structure and effect and the available liquid crystal display is similar.Comprise high-reflecting film, light guide plate, light-diffusing film, crossed nicols optically focused brightness enhancement film and diaphragm thereof.
Described liquid crystal board is the special liquid crystal board that does not have color filter film, and there is orthogonal polarizing coating both sides before and after it, are close to the field angle expanded film on the polarizing coating of front side, to enlarge the visual field.It is the red, green, blue tristimulus signal in the colour picture signal that receives to be separated and drive in chronological order liquid crystal board that the signal reception processing drive system of liquid crystal board receives the difference of handling drive system with the signal in the available liquid crystal display system.
According to varying in size of display size, select to adopt a fine lamp guide or two fine lamp guides (each up and down), fine lamp guide is embedded in the upside of light guide plate or downside (or both sides) up and down, the synthetic standard white light beam of red, green, blue three look laser enters the even light of light guide plate through fine lamp guide, and liquid crystal board finally throws light on.
The present invention adopts the good tricolor laser of brightness height, monochromaticity as backlight, employing does not have the liquid crystal board of color filter film, laser instrument order by three kinds of colors of sequential control is luminous, realize laser order display mode, utilize the eye storage characteristic of human eye to realize the time colour mixture, thereby can expand colour gamut, the raising efficiency of light energy utilization and the spatial resolution of demonstration greatly.And the foremost of the liquid crystal board that adopts is posted the field angle expanded film and can be enlarged the visual field.Not only all will be better than existing liquid crystal display systems far away on the distinct degree of gamut range, color, colored degree true to nature, and resolution can improve 3 times, capacity usage ratio can improve nearly 67%.
Description of drawings
Fig. 1 is the structure principle chart of laser backlight liquid crystal display (LCD) system of the present invention.
Fig. 2 is the synoptic diagram that X type prism closes photosystem.
Fig. 3 is the synoptic diagram that dichroic mirror closes photosystem.
Fig. 4 is the synoptic diagram of dotted line light source converting system of the present invention.
Fig. 5 is that the present invention adopts X type prism to close the synoptic diagram of the laser backlight liquid crystal display (LCD) system of photosystem.
Fig. 6 is that the present invention adopts dichroic mirror to close the synoptic diagram of the laser backlight liquid crystal display (LCD) system of photosystem.
Fig. 7 is the partial enlarged drawing of laser backlight module among the present invention.
Fig. 8 is sequential control figure.
Among the figure: 1; red laser, 2; green laser, 3; blue laser; 4; X type light-combining prism, 5; single wavelength deielectric-coating high reflection mirror, 6; single wavelength deielectric-coating high reflection mirror; 7; anti-green red dichroic mirror, 8; anti-blue saturating red green dichroic mirror, 9; beam splitter; 10; broadband deielectric-coating high reflection mirror, 11; beam expanding lens, 12; beam expanding lens; 13; fine lamp guide, 14; fine lamp guide, 15; the laser backlight module; 16; backlight, 17; liquid crystal board, 18; high-reflecting film; 19; light guide plate; 20; light-diffusing film, 21; crossed nicols optically focused brightness enhancement film, 22; diaphragm; 23; polarizing coating; 24; liquid crystal molecule, 25; polarizing coating, 26; the field angle expanded film.
Embodiment
As shown in Figure 1, the laser backlight liquid crystal display (LCD) system of the present invention signal that comprises the tricolor laser light source and close photosystem, some line source converting system, backlight, liquid crystal board and liquid crystal board receives and handles drive system.
Tricolor laser is luminous by certain sequential control order for comprising red laser 1, green laser 2 and 3, three laser instruments of blue laser, and output power can be controlled respectively.It is the laser instrument of 667nm, 650nm, 640nm, 635nm that ruddiness can adopt wavelength, and it is the laser instrument of 532nm that green glow adopts wavelength, and it is the laser instrument of 447nm, 457nm, 473nm that blue light can adopt wavelength.
LASER Light Source is closed photosystem and can be adopted X type prism as shown in Figure 2 to close photosystem, this system comprises an X type light-combining prism 4 and two catoptrons, X type light-combining prism 4 is realized the synthetic a branch of standard white light of tricolor laser, two single wavelength deielectric-coating high reflection mirror 5 and single wavelength deielectric-coating high reflection mirrors 6 that catoptron is respectively reflect red, green laser.Close photosystem and can adopt as shown in Figure 3 that dichroic mirror closes photosystem, this system comprises an anti-green red dichroic mirror 7 and an anti-blue saturating red green dichroic mirror 8, and this two dichroic mirror can be with the synthetic a branch of standard white light of tricolor laser device.
As shown in Figure 4, point line source converting system comprises catoptron, beam splitter 9, beam expanding lens 11 and beam expanding lens 12 and fine lamp guide 13 and fine lamp guide 14, each fine lamp guide up and down, its effect is to convert the narrow laser beam (a general round spot or the round dot of forming on receiving plane) from laser emitting to certain-length line or column source to offside reflection light.Wherein, catoptron is a broadband deielectric-coating high reflection mirror 10, realizes the light beam deviation.Beam splitter 9 is realized beam split by a certain percentage by reflection and transmission.Beam expanding lens 11 is aplanasia biconcave lenss, light beam can be transformed into the divergent beams with certain pore size angle.Fine lamp guide 13 is cylindrical lamp guide, the distributing scattering particles of certain density of its inside, and its half side-view is coated with highly reflecting films, and an end embeds the anti-type optical device that spreads out with special face structure.Enter fine lamp guide from the divergent beams with certain pore size angle of beam expanding lens outgoing, portion is through end face and offside reflection, form line (post) light source to lateral emitting through the scattering particles scattering within it.
According to varying in size of display size, select to adopt a fine lamp guide or two fine lamp guides (each up and down), fine lamp guide is embedded in the upside of light guide plate or downside (or both sides) up and down, the synthetic standard white light beam of red, green, blue three look laser enters the even light of light guide plate through fine lamp guide, and liquid crystal board finally throws light on.
The present invention adopts laser backlight liquid crystal display (LCD) system that X type prism closes photosystem as shown in Figure 5, and the present invention adopts laser backlight liquid crystal display (LCD) system that dichroic mirror closes photosystem as shown in Figure 6,
As shown in Figure 7, laser backlight module 15 comprises backlight 16 and liquid crystal board 17.Backlight in the structure of backlight 16 and effect and the available liquid crystal display is similar, comprises high-reflecting film 18, light guide plate 19, light-diffusing film 20, crossed nicols optically focused brightness enhancement film 21 and diaphragm 22 thereof.
Fig. 8 has provided sequential control figure, and wherein 1. on behalf of red laser 1, high level light, and red video signal is loaded on the liquid crystal board, and red laser 1 extinguishes between low period, and corresponding red video signal is closed; 2. on behalf of green laser 2, high level light, and video green signal is loaded on the liquid crystal board, extinguishes at low period medium aquamarine laser instrument 2, and the respective green vision signal is closed; 3. on behalf of blue laser 3, high level light, and blue video signal is loaded on the liquid crystal board, extinguishes at low period medium blue laser instrument 3, and corresponding blue video signal is closed.
Claims (5)
1. laser backlight liquid crystal display (LCD) system, the signal reception processing drive system that comprises the tricolor laser light source and close photosystem, some line source converting system, backlight, liquid crystal board and liquid crystal board, it is characterized in that: close photosystem between LASER Light Source and some line source converting system, point line source converting system is positioned at the one or both sides of backlight, liquid crystal board is on backlight, liquid crystal board receives the processing drive system with its signal and is connected, and red-green-blue LASER Light Source ECDC photosystem synthesizes a branch of standard white light; The standard white light converts line or column source to lateral emitting with certain-length to through a line source converting system and is imported into backlight; Light beam becomes evenly backlight in light guide plate; From the even backlighted liquid crystal board of backlight front side outgoing, signal accepts to handle drive system by each pixel of vision signal control liquid crystal board that receives, and the sequential control tricolor laser device order of pressing red, green, blue trichromatic vision frequency signal loading simultaneously is luminous; The effect of described some line source converting system is to convert the narrow laser beam from laser emitting to certain-length line or column source to offside reflection light, comprise catoptron, beam splitter, beam expanding lens and fine lamp guide, catoptron is a broadband deielectric-coating high reflection mirror, realizes the light beam deviation; Beam splitter is realized beam split by a certain percentage by reflection and transmission; Beam expanding lens is the aplanasia biconcave lens, light beam is transformed into the divergent beams with certain pore size angle; The inside of fine lamp guide is distributed with optical scatter, and its half side-view is coated with highly reflecting films, and an end embeds has the anti-type optical device that spreads out.
2. laser backlight liquid crystal display (LCD) system according to claim 1, it is characterized in that: the described photosystem that closes adopts X type prism to close photosystem, comprise an X type light-combining prism and two catoptrons, X type light-combining prism is realized the synthetic a branch of standard white light of tricolor laser, and two catoptrons are single wavelength deielectric-coating high reflection mirrors of difference reflect red, green laser.
3. laser backlight liquid crystal display (LCD) system according to claim 1, it is characterized in that: the described photosystem that closes also adopts dichroic mirror to close photosystem, comprise an anti-green red dichroic mirror and an anti-blue saturating red green dichroic mirror, this two dichroic mirror is with the synthetic a branch of standard white light of tricolor laser device.
4. laser backlight liquid crystal display (LCD) system according to claim 1 is characterized in that: described backlight comprises high-reflecting film, light guide plate, light-diffusing film, crossed nicols optically focused brightness enhancement film and diaphragm thereof.
5. laser backlight liquid crystal display (LCD) system according to claim 1 is characterized in that: described liquid crystal board does not have color filter film, and there is orthogonal polarizing coating both sides before and after it, are close to the field angle expanded film on the polarizing coating of front side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102308177A CN101702063B (en) | 2009-11-25 | 2009-11-25 | Laser backlight liquid crystal display (LCD) system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102308177A CN101702063B (en) | 2009-11-25 | 2009-11-25 | Laser backlight liquid crystal display (LCD) system |
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| Publication Number | Publication Date |
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| CN101702063A CN101702063A (en) | 2010-05-05 |
| CN101702063B true CN101702063B (en) | 2011-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009102308177A Expired - Fee Related CN101702063B (en) | 2009-11-25 | 2009-11-25 | Laser backlight liquid crystal display (LCD) system |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2770363A4 (en) | 2011-10-17 | 2015-06-10 | Appotronics China Corp | Light source and display system |
| CN103883936A (en) * | 2012-12-24 | 2014-06-25 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN104166300B (en) | 2014-07-24 | 2016-01-20 | 杭州虹视科技有限公司 | A kind of laser display system |
| CN104267532B (en) * | 2014-10-21 | 2017-09-26 | 京东方科技集团股份有限公司 | A kind of display panel and preparation method thereof and display device |
| CN104763942A (en) * | 2015-04-22 | 2015-07-08 | 南京中科神光科技有限公司 | Backlight source and liquid crystal display device |
| CN104728684A (en) * | 2015-04-22 | 2015-06-24 | 南京中科神光科技有限公司 | Laser-line light source and liquid crystal display backlight |
| EP3523574A4 (en) * | 2016-10-05 | 2020-06-10 | LEIA Inc. | Mode-selectable backlight, method, and display employing directional scattering features |
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Granted publication date: 20110817 Termination date: 20171125 |