CN203549546U

CN203549546U - Laser back light source device

Info

Publication number: CN203549546U
Application number: CN201320474444.XU
Authority: CN
Inventors: 蔡振家; 周刚; 吴中雄; 刘治新
Original assignee: SHANGHAI SANXIN TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: SHANGHAI SANXIN TECHNOLOGY DEVELOPMENT Co Ltd
Priority date: 2013-08-05
Filing date: 2013-08-05
Publication date: 2014-04-16
Anticipated expiration: 2023-08-05

Abstract

The utility model relates to a laser back light source device which is applied to a laser display system. The laser back light source device comprises a laser light source module and a light guide plate module; the laser light source module comprises a plurality of laser engines; the light guide plate module comprises the conduction area and the effective light-emitting area; laser beams which are emitted out of the laser engines enter into the light guide plate module through the corresponding inlets formed in the conduction area of the light guide plate module respectively to form a uniform back light surface light source which is output through the effective light-emitting area of the light guide plate module. The laser back light source device has the advantages of being energy-saving and environmentally-friendly, high in brightness, high in uniformity, high in definition and the like.

Description

Laser backlight source apparatus

Technical field

The utility model relates to laser display technology field, relates in particular to a kind of laser backlight source apparatus for laser display system.

Background technology

Along with liquid crystal display (LCD) fast development year by year, liquid crystal display is as the large main flow showing in market at present, in all many-sides such as TV, computer and FPD fields, there is application quite widely, and occupy very important status.This mainly originates from the multiple advantage of liquid crystal display: radiationless, consume energy low, dispel the heat little, frivolous portable etc.Yet because liquid crystal itself is not luminous, it needs backlight that light is irradiated on liquid crystal panel, the leading indicators such as brightness, the uniformity, contrast and saturation degree that liquid crystal display presents color all depend on liquid crystal panel backlight behind, so back light source technique is to determine that liquid crystal display presents the key factor of high quality color.

The liquid crystal display early stage of development, adopts cold cathode fluorescent tube (CCFL) as backlight mostly, but its energy consumption is large, the life-span is shorter; Colour gamut is little, generally can only reach 72% of NTSC gamut standards, and the color presenting is abundant not; And in fluorescent tube, contain a small amount of mercury, do not meet environmental protection standard.Along with the development of backlight, light source field has been developed again some green light sources without mercury, as: the several types light sources such as electroluminescent (EL), Light-Emitting Diode (LED) and cut-off barrier discharge (DBD).LED-backlit source be development in recent years than very fast and widely used a kind of backlight, it has started progressively to have substituted traditional CCFL backlight.The significant advantage in LED-backlit source is: environmental protection, the life-span is long, colour gamut is wide, and color rendition scope can reach 105% even more than 120% of NTSC gamut standards.But use LED light source as backlight, also to have its shortcoming: the first, single LEDs brightness is not high enough, need to adopt plurality of LEDs; The second, use more LED, cause power consumption larger, temperature is higher; The 3rd, it is also wide less than laser that color presents scope.

LASER Light Source has high brightness, monochromaticjty is good and the advantage such as good directionality, along with the whole world is in recent years to constantly the capturing of laser technology, makes to adopt laser greatly to increase as the possibility of backlight.Compare with display systems such as existing LED, LCD, CRT, use laser as backlight, can make full use of the alternative of optical maser wavelength and the feature of high spectral luminance factor, make to show that image has larger color appearance space, color saturation and excitation are all higher, the defect that thoroughly breaks through existing Display Technique reflection human eye finding color gamut inadequate natural endowment, has more perfect color restoration capability.In fields such as public information giant-screen, laser television, digital cinemas, Full Color Laser Display Technique has very large development space and wide market application foreground.

But in current laser display system, owing to being limited to the good characteristic of direction of laser beam, laser backlight mainly utilizes laser beam from top to bottom, from left to right to carry out " scanning " and realizes, and utilizes a plurality of minute surfaces of Electric Machine Control to rotate to realize.The laser backlight modular structure of this mode is complicated, the uniformity is bad, cost is higher, and applicable scope is less.

In addition, use laser as backlight, what be badly in need of solving most is exactly the problem of laser beam expanding.Traditional laser backlight source apparatus is owing to being limited to the light-uniforming technology of traditional LGP, makes laser beam can not get sufficient diffusion after entering into LGP, in LGP output face, form be bright dark clearly, highly inhomogeneous area source.

Utility model content

In order to address the above problem, the purpose of this utility model is to provide the laser backlight source apparatus of a kind of energy-conserving and environment-protective, high brightness, high evenness and high image quality.

The purpose of this utility model is to realize by following technical scheme:

A kind of laser backlight source apparatus, for laser display system, comprise laser light source module and light guide plate module, described laser light source module comprises a plurality of laser engines, described light guide plate module comprises conductive area and effective light-emitting zone, in each laser engine emitting laser light beam respectively by the conductive area of light guide plate module separately corresponding entrance enter in light guide plate module, form uniform laser backlight surface light source, by effective light-emitting zone of light guide plate module, exported.

Compared to prior art, laser backlight source apparatus of the present utility model is introduced into conductive area after entering light guide plate module by laser beam, through breaing up of one section of conduction distance in this conductive area, after expanding, form enough large line sources of dispersion angle, enter into again effective light-emitting zone of light guide plate module, further carry out leaded light, after even light, forming the good area source of the uniformity is exported by effective light-emitting zone of light guide plate module, thereby it is high to obtain excitation, color saturation is high, the laser backlight module that brightness is high and the uniformity is high, can be widely used in existing liquid crystal display systems, as LCD TV, computer monitor, automatic navigator, panel computer, mobile phone, game machine etc., its gamut range, the distinct degree of color, the degree true to nature of color, the aspect such as brightness and energy-conserving and environment-protective all will be better than existing liquid crystal display systems far away.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model laser backlight source apparatus.

Fig. 2 is the structural representation of laser engine in laser light source module in the utility model laser backlight source apparatus.

Fig. 3 is the structural representation of the another kind of scheme of laser engine in laser light source module in the utility model laser backlight source apparatus.

Fig. 4 is the structural representation of another scheme of laser engine in laser light source module in the utility model laser backlight source apparatus.

Fig. 5 is used the schematic diagram of the light guide plate module of nanoscale light-scattering material particle in the utility model laser backlight source apparatus.

Fig. 6 is the structural representation of another scheme of light guide plate module in the utility model laser backlight source apparatus

The specific embodiment

With the specific embodiment, the utility model is described in further detail by reference to the accompanying drawings now.

Figure 1 shows that the schematic diagram of an embodiment of laser backlight source apparatus of the present utility model.This embodiment be take eight laser engines, and to form a laser light source module be example, and as shown in Figure 1, the laser backlight device of the present embodiment comprises laser light source module 1 and light guide plate module 2.As shown in Figure 2, each laser engine comprises a red laser 5, green laser 6, blue laser 7, ruddiness collimating mirror 8, green glow collimating mirror 9, blue light collimating mirror 10, anti-turquoise beam splitter 11, anti-blue red green beam splitter 12 and a shaping lens 13 thoroughly of being popular in.These two

beam splitters

11,12 can be just merge into outgoing in the same direction towards the tricolor laser of different directions outgoing, and shaping lens 13 becomes consistent size by the spot shaping of the redgreenblue laser after converging.The structural design of laser engine is not limited to this kind of shape, can also by shown in Fig. 3 and 4 and any shape similar in appearance to this kind of structure design.

As shown in Figure 1, light guide plate module 2 is rectangular build, thickness is 5mm, comprise conductive area 14 and effective light-emitting zone 15, conductive area 14 refers to from laser and enters to inject light guide plate module 2 to the complete diffusion part of laser beam, after all beam spread in this region, directly enters effective light-emitting zone 15.Effectively light-emitting zone 15 refers to finally by light guide plate module 2 output face Output of laser beam sections, is also liquid crystal panel cover part.

Conductive area 14 has been made light inlet shape as shown in Figure 1 according to the use number of laser engine, and with laser cutting technique, has respectively cut a gap 3 at arrival end, and these gap 3 length are about 100mm-150mm.The main purpose of specially cutting this gap 3 is: laser is because direction collimation is fine, the dispersion angle of incident laser light beam is very little, utilize the nanoscale scattering particles of the special material in this light guide plate module 2 to need the propagation distance of one section of about 100mm-150mm the dispersion angle of laser could be expanded to enough large, so that LASER Light Source is from the enough large line source of the very little spot light formation angle of divergence of the script angle of divergence.

The right-angle side on conductive area 14 both sides, edge of light guide plate module 2 has been made circular arc chamfering 4 shapes of approximately 90 °.In conductive area 14, the effect of cutting arc shape work piece chamfering 4 is: when laser beam incides herein, the laser beam of reflection can cover the larger scope of effective light-emitting zone 15, and effectively prevent light beam Yan Yuan road from returning and overflow light guide plate module 2, thereby make the laser beam stack in effective light-emitting zone more abundant, make the light beam of light guide plate module 2 output faces brighter, more even.

Light guide plate module 2 is also different with the manufacture craft of the light guide plate module that tradition is used, not needing that dotted line processing is carried out in its surface processes, stamp micro lens or reflective spot, but add certain special nanoscale light-scattering material particle 16 in sheet material casting cycle, form, utilize size and the distribution density of nanoscale optical scatter 16 line source can be converted into area source efficiently, equably, the schematic diagram of light guide plate module 2 as shown in Figure 5.

In addition, light guide plate module in the shape that only limits to structure shown in Fig. 1, can also according to practical application by shown in Fig. 6 and any shape similar in appearance to this class formation design.For the laser light source module that coordinates the light guide plate module 2a shown in Fig. 6 to design, can be divided into two parts and carry out outgoing beam, a part still adopts six laser engines by middle, to be entered the conductive area of light guide plate module 2a as shown in FIG. 1, a part is from the edge 17 of light guide plate module 2a, to enter the conductive area of light guide plate module in addition, the advantage of design is the brightness that can improve edge, light guide plate module 2a limit like this, thereby further improves the whole uniformity of light guide plate module 2a.In the conductive area of light guide plate module 2a, also cut a circular arc 18, the object of doing is like this also in order to increase scattering number of times and the reflective surface area of laser beam simultaneously, improves the uniformity of light guide plate module 2a.

The non-exiting surface of light guide plate module 2 all posts the reflectance coating of high reflectance, makes light beam multiple reflections, to improve the efficiency of light energy utilization.The output face of LGP also can be posted diffusion barrier, brightness enhancement film (comprising BEF film and D-BEF film).

In the present embodiment, laser light source module 1 is comprised of eight laser engines, the laser of eight engines is entered in the conductive area 14 of light guide plate module by eight light inlets on light guide plate module 2 respectively, conduction through the scattering particles in conductive area 14 and 100mm-150mm conduction distance, after diffusion, formed the angle of divergence enough large line source enter into effective light-emitting zone 15 of light guide plate module, pass through again nanoscale light-scattering material particle 16 and the enough continuous reflections repeatedly of reflectance coating in this section of light guide plate module, after scattering and diffusion, laser beam forms the most at last the good area source of the uniformity and is exported by the output face of light guide plate module 2.

Above-described backlight all can combine with a liquid crystal panel, and as the backlight of liquid crystal panel.Moreover, backlight disclosed in the utility model also can be applicable to any display (as: computer, TV, communication product, video product, portable product, projection products, audio-visual projection product, billboards or similar product) or light-emitting device (as vehicle mounted light fixture, head carry light fixture or similar assembly) with related needs.

In addition, in the utility model, laser light source module 1 is comprised of eight laser engines, yet, the quantity of laser engine can be determined according to the size of the power of actual engine, LGP and liquid crystal panel, two kinds of being also not limited only to mention in the utility model of the planform of LGP.

Although with reference to preferred embodiment of the present utility model, the utility model is illustrated and is described.But; the utility model is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. a laser backlight source apparatus, for laser display system, it is characterized in that: comprise laser light source module and light guide plate module, described laser light source module comprises a plurality of laser engines, described light guide plate module comprises conductive area and effective light-emitting zone, in each laser engine emitting laser light beam respectively by the conductive area of light guide plate module separately corresponding entrance enter in light guide plate module, form uniform laser backlight surface light source, by effective light-emitting zone of light guide plate module, exported.

2. laser backlight source apparatus according to claim 1, is characterized in that: the conductive area of described light guide plate module has respectively been cut a gap in the porch of laser engine.

3. laser backlight source apparatus according to claim 2, is characterized in that: the length in described gap is 100mm-150mm.

4. laser backlight source apparatus according to claim 1, is characterized in that: described laser light source module comprises eight laser engines, and each laser engine comprises three kinds of laser of RGB, also comprises collimating mirror, beam splitter and shaping lens in laser engine.

5. laser backlight source apparatus according to claim 1, is characterized in that: the conductive area of described light guide plate module has respectively been cut the circular arc chamfering of a section 90 ° at two right-angle side places.

6. laser backlight source apparatus according to claim 1, is characterized in that: the non-exiting surface of described light guide plate module all posts highly reflecting films.