CN205910484U

CN205910484U - Use wavelength transformation principle's novel light source device

Info

Publication number: CN205910484U
Application number: CN201620837395.5U
Authority: CN
Inventors: 刘西锋
Original assignee: Qingdao Blue Rainbow Photoelectric Technology Co Ltd
Current assignee: Qingdao Blue Rainbow Photoelectric Technology Co Ltd
Priority date: 2016-08-04
Filing date: 2016-08-04
Publication date: 2017-01-25
Anticipated expiration: 2026-08-04

Abstract

The utility model provides an use wavelength transformation principle's novel light source device, its characterized in that includes the excitation light source 1, wavelength conversion layer 2 and the filter layer that set up along optical axis direction interval in proper order 3, this excitation light source 1 of adopts UV laser or short wavelength blue laser, and wavelength coverage is 300 - 410nm, this wavelength conversion layer 2 is used for converting UV light or short wavelength's blue light into red, green, blue third colored light outgoing, this filter layer 3 is used for reflecting UV or short wavelength blue band's (300 - 410nm) light, passs through visible light wave band (450 - 650nm's) light simultaneously. The utility model has the advantages that: in the wavelength conversion type light source of laser as excitation source, effectively avoid laser to penetrate the human danger that causes directly to solve near ultraviolet and short wavelength's blue light to the injury of people's eye, solved display frame that laser lamp -house the leads to spot problem of loosing. Both compromise the security, compromise display performance again.

Description

The Novel light source of application wavelength convert principle

Technical field

The present invention relates to a kind of Novel light source of application wavelength convert principle, can be used for liquid crystal backlight or projection Light source.

Background technology

LASER Light Source starts extensively to apply in projection, flat display field at present.Because tricolor laser technology does not become Ripe, generally adopt 1 one-wavelength laser+other light source (LED light source or fluorescent material stimulated lighting devices).

The laser backlight scheme that for example Rhizoma Sparganii is announced earliest, uses red laser+indigo plant, the form of green glow led.Due to Used as light source using red laser, red laser partly may have to human eye and health compared with major injury, bring simultaneously Speckle noise in display picture.

And the mixing light source of one-wavelength laser+fluorescent material stimulated luminescence, generally adopt blue laser (generally in 440nm 470nm) as excitaton source, red, green two kinds of fluorescent material, as the light source that is stimulated, are finally accomplished that blue laser+redness is excited Light source+green is excited the mixing light source of light source.Blue light in mixing light source is the laser of single wavelength, simultaneously for launching efficiency Consider, the wavelength of blue light is typically shorter.Therefore the blue light ingredient in mixing light source has compared with major injury to human eye and health, same When there is also picture speckle noise problem.

Photopeak science and technology already allows for the problems referred to above at present, starts to develop correlation technique and applied for patent.It is typical Patent is " light source based on wavelength convert and its secondary excitation method " (number of patent application 201010531498.6): the first peak value The excitation source of the exciting light (uv light) of wavelength, using the first optical wavelength conversion material, has for absorbing exciting light exciting The light (blue light) of the second peak wavelength；Include the second optical wavelength conversion material simultaneously, for absorbing this, there is the second peak wavelength Light and excite the stimulated luminescence with the 3rd peak wavelength (HONGGUANG, green glow).It is straight that this kind of way can be prevented effectively from original light source Pick out the problem penetrated.But due to employing the mode of secondary excitation, efficiency is necessarily greatly affected, and blue light is simultaneously Penetrate light, and be the excitaton source of the 3rd peak wavelength simultaneously, for guaranteed efficiency, wavelength generally shorter, the direct outgoing meeting of blue light Human eye is produced compared with major injury.

Content of the invention

The present invention is intended to provide a kind of application wavelength convert principle Novel light source, solve currently using laser as swash The following problems that the display light source rising exists: 1) because wavelength is short, energy is high, easily human body is damaged；2) show light The blue light harm in source；3) the display picture speckle noise problem that laser leads to directly as display light source.

The technical scheme is that a kind of Novel light source of application wavelength convert principle it is characterised in that including Along optical axis direction successively spaced excitation source, wavelength conversion layer and filter layer, this excitation source adopts uv laser or short Wavelength blue laser；This wavelength conversion layer is used for for uv light or short wavelength's blue light being converted to red, green, blue three coloured light outgoing；This filter Photosphere is used for reflecting uv or the light of short wavelength's blue wave band, the light of transmission visible light wave range simultaneously.

The blue light wavelength that described wavelength conversion layer changes outgoing is 460 480nm, and green wavelength is 530 570nm, Red light wavelength is 620 640nm.

Described wavelength conversion layer be can absorb the light of shorter wavelength and launch longer wavelength light quanta point material thin Layer.

The invention has the advantage that in laser as in the wavelength conversion type light source of excitaton source, effectively prevent laser direct projection The danger that human body causes, and solve the injury for human eye of near ultraviolet or short wavelength's blue light, effectively eliminate display picture simultaneously Face speckle issue.Both take into account safety, take into account display performance again.

Brief description

Fig. 1 is the essential structure schematic diagram of the present invention.

Specific embodiment

Referring to Fig. 1, the basic structure principal character of light source of the present invention is as follows:

1) excitation source 1: for uv laser or short wavelength's blue laser, wave-length coverage is 300 410nm.

2) wavelength conversion layer 2: Main Function is to absorb uv light or short wavelength's blue light, and uv light or short wavelength's blue light are converted to Red, green, blue three coloured light outgoing.Wherein:

Blue light wavelength is 460 480nm.This wavelength both ensure that uv light or short wavelength's blue light excited the efficiency of conversion, Reduce the injury to human eye again.

Green wavelength is 530 570nm.

Red light wavelength is 620 640nm.

Wavelength conversion layer 2 can use quantum dot material thin-layer, is characterized in that the light transmitting that can absorb shorter wavelength is longer The light of wavelength.The peak wavelength of emergent light controls (routine techniquess) by the particle diameter of quantum dot, required for being accurately obtained Wavelength, and have narrower half-wave width.

3) effect of filter layer 3 is the light of reflection uv or short wavelength's blue wave band (300 410nm), and transmission is visible simultaneously The light of optical band (450 650nm).In addition, excitation source (ultraviolet light or short wavelength's blue light) is blocked in finally by filter layer 3 Emergent light outside so that user avoids the injury that laser or short wavelength's blue light cause.

4) emergent light of filter layer 3 is white light, comprises the light of red, green, blue three primary colours.If wavelength conversion layer 2 employs Quanta point material, the half-wave width of the light of red, green, blue three primary colours of the white light of outgoing all can be in below 40nm.It is applied to liquid crystal Show or Projection Display will obtain higher gamut range (> 100%ntsc).

Claims

1. a kind of Novel light source of application wavelength convert principle sets it is characterised in that including being spaced successively along optical axis direction Excitation source, wavelength conversion layer and the filter layer put, this excitation source adopts uv laser or short wavelength's blue laser；This wavelength turns Change layer for uv light or short wavelength's blue light are converted to red, green, blue three coloured light outgoing, the blue light wavelength changing outgoing is 460 480nm, green wavelength is 530 570nm, and red light wavelength is 620 640nm；This filter layer is used for reflecting uv or short wavelength is blue The light of optical band, the light of transmission visible light wave range simultaneously.

2. the Novel light source of application wavelength convert principle according to claim 1 is it is characterised in that described wavelength Conversion layer is the light quanta point material thin-layer that can absorb the light of shorter wavelength and launch longer wavelength.