CN101923273B

CN101923273B - Display device

Info

Publication number: CN101923273B
Application number: CN2009101463902A
Authority: CN
Inventors: 熊坚智; 黄郁湘
Original assignee: Asia Optical Co Inc
Current assignee: Asia Optical Co Inc
Priority date: 2009-06-17
Filing date: 2009-06-17
Publication date: 2012-06-06
Anticipated expiration: 2029-06-17
Also published as: CN101923273A

Abstract

The invention relates to a display device, which comprises a light source module and an optical engine. The light source module is provided with a plurality of luminous components and a wavelength conversion device, wherein the luminous components can emit single-wavelength lights, and the wavelength conversion device is provided with different fluorescent substances; and when a beam emitted by the luminous components passes through the fluorescent substances, the beam can be converted to generate visible lights with different wavelength ranges. The optical engine is provided with at least one miniature display component; when the visible lights enter the optical engine, the miniature display component generates an image beam from the visible lights; and finally the image beam can be projected on a display screen.

Description

A kind of display device

Technical field

The present invention relates to a kind of display device, particularly a kind of display device with Wavelength converter.

Background technology

Because laser (Laser) has characteristics such as high directivity, high brightness property, monochromaticity, it can be sent to the almost indiffusible again directional light of target enough far away, therefore on many display device products, all can utilize laser to be used as illuminating source.

As shown in Figure 1, it is the known synoptic diagram that utilizes laser light to be used as a kind of display device of light source, and this display device 1 comprises light source module 10, light engine 20 and display screen 30.

This light source module 10 is made up of three primary colors rgb light source; Be respectively red laser light source 11, green laser light source 12 and blue laser light source 13, wherein, this green laser light source 12 is a kind of SHGlaser (Second Harmonic Green laser; The green laser of second harmonic); This

laser light source

11,12,13 is all visible light, and promptly the light beam that sends of red laser light source 11 is a ruddiness, and the light beam that green laser light source 12 is sent is a green glow; The light beam that blue laser light source 13 sends is then for blue light, can produce versicolor visible light via the mutual collocation of these three primary colors RGB.

This light engine 20 has first collimating mirror 211, second collimating mirror 212, the 3rd collimating mirror 213; 211 pairs of this first collimating mirrors should red laser light source 11; 212 pairs of this second collimating mirrors should green laser light source 12, the three collimating mirrors 213 pairs should blue laser light source 13; First spectroscope 221, second spectroscope 222, the 3rd spectroscope 223; This first spectroscope 221 is also to should red laser light source 11; This second spectroscope 222 is also to should green laser light source 12; 223 in the 3rd spectroscope is to should blue laser light source 13, and this spectroscope 221,222,223 identical angle that all tilts is so that different light paths can be synthesized same light path; Beam shaping assembly 23, in order to changing the light shape, its with the optical axis of synthetic same light path at same straight line; Prism 24, its be a kind of polarization splitting prism (PolarizedBeam-Splitter, PBS), in order to P light and S light are separated; Miniature display module 25; It can be MEMS (MEMS; Micro Electro Mechanical Systems) or liquid crystal on silicon (LCOS, Liquid Crystal On Silicon) or display panels (LCD, Liquid Crystal Display) or digital optical processor (DLP; Digital Light Processor), in this Fig. 1, be example with liquid crystal on silicon (LCOS); And camera lens 26.

This display screen 30 is in order to show the image that is projected by this camera lens 26.

When the switch of this display device 1 was unlocked, the red laser light source 11 of this light source module 10, green laser light source 12, blue laser light source 13 promptly can receive signal and differentiate the light source of which color and need be unlocked.With shown in Figure 1; This red laser light source 11, this green laser light source 12, this blue laser light source 13 are all the state of being unlocked; Therefore this red laser light source 11 can send red beam, and this green laser light source 12 can be sent green beam, and this blue laser light source 13 can send blue light beam; This red beam arrives this second spectroscope 222 through these first spectroscope, 221 back reflections; This green beam produces yellow light beam through these second spectroscope, 222 backs with this red beam colour mixture, and this blue light beam produces white light beam with this yellow light beam colour mixture again through behind the 3rd spectroscope 223, and then this white light beam can be passed through this beam shaping assembly 23 and this prism 24; Arriving should miniature display module 25 also behind this prism 24 of reflected back again, projects image by this camera lens 26 again and is imaged on this display screen 30.

What be worth explanation is; Above-mentioned redness, green, blue

laser light source

11,12,13 not necessarily can be lighted simultaneously; So in light engine 20, be not necessarily to produce white light, and the order of red, green, blue

laser light source

11,12,13 emission light beams and on-fixed are as stated.

Because present green laser light source price is high, and the green laser light source that known display device is used is SHG laser, so price is higher, and the cost of whole display device will promote comparatively speaking.

Summary of the invention

The technical matters that the present invention will solve is, to the higher defective of laser light source price that display device adopted in the prior art, provides a kind of need single wavelength light source can be directly changed into the display device of visible light via Wavelength converter.

The technical solution adopted for the present invention to solve the technical problems is, a kind of display device is provided, and comprises light source module and light engine.This light source has the plural luminescence component that can send single wavelength; And Wavelength converter; It has redness, green, blue fluorescent substance; Behind this fluorescent material of light beam process that luminescence component sent, can change the redness, green, the blue visible light that produce different wavelength range respectively.This light engine has at least one miniature display module, after this visible light gets into this light engine, produces image strip via miniature display module.At last, image strip can be projected on the display screen,

Wherein this single wavelength is between short uv light and blue light.

According to display device of the present invention, the single wavelength light beam that this luminescence component sent is ultraviolet laser light.

According to display device of the present invention, this Wavelength converter comprises first converting unit, second converting unit and the 3rd converting unit, and the fluorescent material of being placed is respectively red fluorescence powder, green emitting phosphor and blue colour fluorescent powder.

According to display device of the present invention, this light engine has more collimating mirror, spectroscope, beam shaping assembly and prism.

According to display device of the present invention, this light engine has more camera lens.

According to display device of the present invention, this miniature display module is MEMS or liquid crystal on silicon or display panels or digital optical processor.

The display device of embodiment of the present invention has following beneficial effect: because luminescence component used in the present invention is all the light source of same form, therefore just need not use known SHG 1aser in the green light source part, not only reduce cost, also simplify total system.

Description of drawings

To combine accompanying drawing and embodiment that the present invention is described further below, in the accompanying drawing:

Shown in Figure 1 is the synoptic diagram of known a kind of display device; And

Shown in Figure 2 is the synoptic diagram of a kind of display device of the present invention.

Embodiment

See also shown in Figure 2ly, it illustrates the synoptic diagram into display device of the present invention, and this display device 100 comprises light source module 40, light engine 50 and display screen 60.

This light source module 40 has a plurality of luminescence components 41; The light beam that this luminescence component 41 is sent is ultraviolet laser light; For a kind of single wavelength and be invisible light, the wavelength of use is better between short uv light (short UV) and blue light (blue ray); Wavelength converter 42; Invisible light in order to this luminescence component 41 is sent converts visible light to; This Wavelength converter 42 mainly is made up of first converting unit 421, second converting unit 422,423 of the 3rd converting units; And be placed with the fluorescent material of different colours in it respectively; Be placed with the red fluorescence powder R in the three primary colors in this first converting unit 421; Be placed with the green emitting phosphor G in the three primary colors in this second converting unit 422, be placed with the blue colour fluorescent powder B in the three primary colors in the 3rd converting unit 423, the light beam that this luminescence component 41 sends can produce ruddiness, green glow, blue light respectively through redness, green, blue colour fluorescent powder R, G, B.

This light engine 50 has first collimating mirror 511, second collimating mirror 512, the 3rd collimating mirror 513; 511 pairs of this first collimating mirrors should red fluorescence powder R; 512 pairs of this second collimating mirrors should green emitting phosphor G, and 513 pairs of the 3rd collimating mirrors should blue colour fluorescent powder B; First spectroscope 521, second spectroscope 522, the 3rd spectroscope 523; This first spectroscope 521 is also to should red fluorescence powder R; This second spectroscope 522 is also to should green emitting phosphor G; 523 in the 3rd spectroscope is to should blue colour fluorescent powder B, and this spectroscope 521,522,523 identical angle that all tilts is so that different light paths can be synthesized same light path; Beam shaping assembly 53, in order to changing the light shape, its with the optical axis of synthetic same light path at same straight line; Prism 54, its be a kind of polarization splitting prism (Polarized Beam-Splitter, PBS), in order to P light and S light are separated; Miniature display module 55 is used to make incident light to carry signal of video signal, thereby produces image strip; It can be MEMS (MEMS; Micro Electro Mechanical Systems) or liquid crystal on silicon (LCOS, Liquid Crystal On Silicon) or display panels (LCD, Liquid CrystalDisplay) or digital optical processor (DLP; Digital Light Processor), be example with liquid crystal on silicon (LCOS) in the present invention; And camera lens 56.

This display screen 60 is in order to show the image that is projected by this camera lens 56.

When the switch of this display device 100 was unlocked, the luminescence component 41 of this light source module 40 can receive signal and come control bundle whether to launch, and was incident upon this Wavelength converter 42.With shown in Figure 2 is example; Because this first converting unit 421 is built-in with red fluorescence powder R, this second converting unit 422 is built-in with green emitting phosphor G, and the 3rd converting unit 423 is built-in with blue colour fluorescent powder B; Therefore the light beam through this first converting unit 421 can convert visible red beam to; Light beam through this second converting unit 422 can convert visible green beam to, and the light beam of process the 3rd converting unit 423 can convert visible blue light beam to, then; This red beam arrives this second spectroscope 522 through these first spectroscope, 521 back reflections; This green beam produces yellow light beam through these second spectroscope, 522 backs with this red beam colour mixture, and this blue light beam produces white light beam with this yellow light beam colour mixture again through behind the 3rd spectroscope 523, and then this white light beam can be passed through this beam shaping assembly 53 and this prism 54; Arriving should miniature display module 55 also behind this prism 54 of reflected back again, projects image by this camera lens 56 again and is imaged on this display screen 60.

What be worth explanation is, above-mentioned luminescence component 41 not necessarily can be lighted simultaneously, so in light engine 50, be not necessarily to produce white light, the putting in order not necessarily as stated of this Wavelength converter.

Because luminescence component used in the present invention is all the light source of same form, therefore just need not use known SHG laser in the green light source part, not only reduce cost, also simplified total system.

In sum, the present invention has really met the important document of patent of invention, and the whence proposes patented claim in accordance with the law.But the above person is merely preferred embodiments of the present invention, and the equivalence that those skilled in the art person does according to spirit of the present invention is modified or changed, and all is covered by in the scope of claim.

Claims

1. a display device is characterized in that, comprising:

Light source module; Has the plural luminescence component that sends the single wavelength light beam; And Wavelength converter, wherein this Wavelength converter has redness, green, blue fluorescent substance, respectively in order to the single wavelength Beam Transformation is become redness, green, the blue visible light bundle of different wavelength range; And

Light engine has miniature display module, behind this light engine of visible light beam incident of different wavelength range, produces image strip by this miniature display module, and image strip is projeced into a display screen afterwards;

Wherein this single wavelength is between short uv light and blue light.

2. display device as claimed in claim 1 is characterized in that the single wavelength light beam that this luminescence component sent is ultraviolet laser light.

3. display device as claimed in claim 1 is characterized in that, this Wavelength converter comprises first converting unit, second converting unit and the 3rd converting unit, and the fluorescent material of being placed is respectively red fluorescence powder, green emitting phosphor and blue colour fluorescent powder.

4. display device as claimed in claim 1 is characterized in that, this light engine has more collimating mirror, spectroscope, beam shaping assembly and prism.

5. display device as claimed in claim 4 is characterized in that this light engine has more camera lens.

6. display device as claimed in claim 1 is characterized in that, this miniature display module is MEMS or liquid crystal on silicon or display panels or digital optical processor.