CN108828888A - A kind of projection device - Google Patents
A kind of projection device Download PDFInfo
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- CN108828888A CN108828888A CN201810680333.1A CN201810680333A CN108828888A CN 108828888 A CN108828888 A CN 108828888A CN 201810680333 A CN201810680333 A CN 201810680333A CN 108828888 A CN108828888 A CN 108828888A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
Abstract
The present invention is suitable for image display device technical field, provides a kind of projection device, including shell and is set to the intracorporal light supply apparatus of shell, color separator, optic modulating device, image synthesizer and optical projection means；Light supply apparatus includes one or more quasi- natural light LED light sources, the quasi- natural light LED light source issues quasi- natural light, the relative spectral power of red light is greater than 0.60 in quasi- natural light, the relative spectral power of cyan light is greater than 0.30, the relative spectral power of blue light is less than 0.75, blue light color ratio is less than 5.7%, also, the colour rendering index of the quasi- natural light is greater than 95.By the present invention in that forming light source assembly setting inside housings with quasi- natural light LED light source, provide a kind of closer daylight and comfortable pleasant lighting environment, contrast and saturation degree after image synthesis are also improved, reduce the relative spectral power of blue light, colour rendering index is improved, can effectively reduce injury of the blue light to human eye.
Description
Technical field
The invention belongs to image display device technical field, in particular to a kind of projection device.
Background technique
Projection device be it is a kind of the profile of image is amplified using optical element, and the optics instrument being projected on shadow screen
Device is now widely used for family, office, school and public place of entertainment, according to working method difference, there is CRT, LCD, DLP etc.
Different type.The working principle of projection device be by the mixed white light of white light source by optical element be separated into three primary colors (R, G,
B), in correspondence image each pixel feature, the light of three kinds of colors forms character pair after passing through optic modulating device
Image amplifies through projection arrangement and projects on screen.
Current projection device, although brightness is higher, since the improper use of lighting source is (referring to Figure 10, spectrum
Middle blue light ingredient is more, and especially the blue light of 440nm, red color light component are lower), user, which observes projection screen, may feel that display
Not clear enough, vision is easier fatigue, and long focus projected image can injure eyesight.
Therefore, as a kind of higher equipment of utilization rate in people's study and work, it is necessary to the light source of projection device
It is advanced optimized.
Summary of the invention
The purpose of the present invention is to provide a kind of projection devices, it is intended to solve the image view of projection device in the prior art
The technical issues of feel impression is bad, deteriorated vision.
The invention is realized in this way a kind of projection device, including shell and it is set to the intracorporal light supply apparatus of shell, face
Color separation device, optic modulating device, image synthesizer and optical projection means；The light supply apparatus includes one or more quasi-
Natural light LED light source, the quasi- natural light LED light source issue quasi- natural light；The color separator is for making the standard certainly
Right light is separated into the light of multiple color；The optic modulating device is for the light of the multiple color to be converted into being used to indicate
The modulation light of image；Described image synthesizer is for making the modulation light of multiple color synthesize image light；The optical projection
Device is used for described image light projection to being projected face；The relative spectral power of red light is greater than in the quasi- natural light
0.60；The relative spectral power of cyan light is greater than 0.30 in the quasi- natural light；The light relatively of blue light in the quasi- natural light
Spectral power is less than 0.75；Blue light color ratio in the quasi- natural light is less than 5.7%；The colour rendering index of the quasi- natural light is greater than
95。
At least one set of luminescence component that the quasi- natural light LED light source includes basal layer, is set on the basal layer, with
And the circuit being electrically connected with the luminescence component；Luminescence component described in every group includes white-light emitting body and red emitting luminophores, described
White-light emitting body includes blue chip and the fluorescent film for covering the blue chip, and the red emitting luminophores include red light chips；
The white light of the white-light emitting body transmitting is mixed with the feux rouges that the red emitting luminophores emit, and the feux rouges is described white for compensating
The red light portion that light is lacked relative to natural spectrum forms quasi- natural light.
The color separator includes multiple dichronic mirrors and multiple total reflection mirrors；Alternatively, the color separator
Including rotating colour filter.
Parallel lens device is additionally provided between the color separator and the optic modulating device, for making each color
Light ray parallel dissolve into and be incident upon the optic modulating device.
The optic modulating device includes red Light modulation element, green Light modulation element and blue light modulation component, described
Red Light modulation element, green Light modulation element and blue light modulation component include liquid crystal display panel and enter set on liquid crystal display panel
Penetrate the incident polarizer of side and the outgoing polarization piece set on liquid crystal display panel exiting side；Alternatively, the optic modulating device includes number
Micro-reflector.
The color synthesizer includes cross colour splitting prism.
The white-light emitting body and red emitting luminophores pass through identical driving current unified driving.
In the luminescence component described in one group, the quantity of the white-light emitting body and the quantity ratio of the red emitting luminophores are 1
~8:1, the total light flux of the white-light emitting body and total light radiation ratio of the red emitting luminophores are 2-10:1.
The relative spectral power of 440nm blue light is lower than 0.65 in the quasi- natural light.
When the colour temperature of the quasi- natural light is 2700K-3000K, the relative spectral power of 440nm blue light is lower than 0.50；
When the colour temperature of the quasi- natural light is 4000K-4200K, the relative spectral power of 440nm blue light is lower than 0.60；
When the colour temperature of the quasi- natural light is 5500K-6000K, the relative spectral power of 440nm blue light is lower than 0.65.
Projection device provided by the invention forms light source assembly by using quasi- natural light LED light source and is arranged in shell
Portion, quasi- natural light LED light source issue quasi- natural light, and the relative spectral power of red light is greater than 0.60 in the quasi- natural light, cyan
The relative spectral power of light is greater than 0.30, blue light color of the relative spectral power of blue light less than 0.75 and in quasi- natural light
Than less than 5.7%, colour rendering index is higher than 95.Illumination spectrum is complete, and the contrast, saturation degree after image projection are also improved,
Clear, easy resolution that image is shown, real colour also reduce the relative spectral of blue light, can effectively reduce and watch projected picture attentively
Caused visual impairment problem.
Detailed description of the invention
Fig. 1 is the overall structure diagram of projection device provided in an embodiment of the present invention；
Fig. 2 is the construction module schematic diagram of projection device provided in an embodiment of the present invention；
Fig. 3 is the schematic perspective view of quasi- natural light LED light source provided in an embodiment of the present invention；
Fig. 4 is the top view of quasi- natural light LED light source provided in an embodiment of the present invention；
Fig. 5 is the sectional view along A-A of quasi- natural light LED light source provided in an embodiment of the present invention；
Fig. 6 is the bottom view of quasi- natural light LED light source provided in an embodiment of the present invention；
Fig. 7 is the spectral schematic of quasi- natural light provided in an embodiment of the present invention；
Fig. 8 is the spectrum test report figure of quasi- natural light shown in Fig. 7；
Fig. 9 is the spectrum comparison diagram of quasi- natural radiant and natural light provided in an embodiment of the present invention；
Figure 10 is the spectrum comparison diagram of existing near-nature forest radiant and natural light；
Figure 11 is the spectrogram of white-light emitting body provided in an embodiment of the present invention；
Figure 12 is the white-light spectrum figure provided in an embodiment of the present invention using 452.5-455nm blue chip；
Figure 13 is a kind of spectrogram of near-nature forest radiant in the prior art.
Meaning marked in the figure is：
Projection device 100, shell 1, light supply apparatus 2, quasi- natural light LED light source 22, color separator 3, the first color separation
Mirror 31, the second dichronic mirror 32, the first total reflection mirror 33, the second total reflection mirror 34, third total reflection mirror 34, parallel lens device 4,
First parallel lens 41, the second parallel lens 42, third parallel lens 43, optic modulating device 5, red Light modulation element 51 are green
Coloured light modulation component 52, blue light modulation component 53, image synthesizer 6, optical projection means 7 are projected face 8；
White-light emitting body 221, red emitting luminophores 222, circuit board 230, the first pin 231, second pin 232, basal layer
210, reflector 211, reflective surface 2111.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
It should be noted that when component is referred to as " being fixed on " or " being set to " another component, it can directly or
It connects on another component.When a component is known as " being connected to " another component, it be can be directly or indirectly
It is connected on another component.The orientation or positional relationship of the instructions such as term " on ", "lower", "left", "right" is based on attached drawing
Shown in orientation or positional relationship, be merely for convenience of describing, rather than the device or element of indication or suggestion meaning must have
There is specific orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation to this patent.Term " first ",
" second " is used merely to facilitate description purpose, is not understood to indicate or imply relative importance or implicitly indicates technical characteristic
Quantity.The meaning of " plurality " is two or more, unless otherwise specifically defined.
In order to illustrate technical solutions according to the invention, it is described in detail below in conjunction with specific accompanying drawings and embodiments.
Fig. 2 and Fig. 4 are please referred to, the present invention provides a kind of projection device 100, including shell 1 and is set in shell 1
Light supply apparatus 2, color separator 3, optic modulating device 5, image synthesizer 6 and optical projection means 7；Light supply apparatus 2 wraps
One or more quasi- natural light LED light sources 22 are included, which issues quasi- natural light；Color separator 3 is used
In the light for making quasi- natural light be separated into multiple color；Optic modulating device 5 is for being converted into the light of multiple color to be used for table
The modulation light of diagram picture；Image synthesizer 6 is for making the modulation light of multiple color synthesize image light；Optical projection means 7
For the image light of synthesis to be projected the face of being projected 8；The relative spectral power of red light is greater than 0.60 in quasi- natural light, blueness
The relative spectral power of coloured light be greater than 0.30, the relative spectral power of blue light less than 0.75, blue light color ratio less than 5.7%, and
And the colour rendering index of the quasi- natural light is greater than 95.
Projection device 100 provided by the invention forms light source assembly by using quasi- natural light LED light source 22 and is arranged in shell
Inside body 1, quasi- natural light LED light source 22 issues quasi- natural light, and the relative spectral power of red light is greater than in the quasi- natural light
0.60, the relative spectral power of cyan light is greater than 0.30, indigo plant of the relative spectral power of blue light less than 0.75, in quasi- natural light
Photochromic ratio less than 5.7%, colour rendering index be greater than 95, illumination spectrum is complete, and illumination spectrum is complete, image projection after contrast,
Saturation degree is also improved, and clear, easy resolution that image is shown also reduces the relative spectral of blue light, can effectively reduce and watch attentively
Visual impairment problem caused by projected picture.
Certainly, it is additionally provided with control device and cooling device, power supply device etc. in shell 1, no longer illustrated.
The mixed white light issued from multiple quasi- natural light LED light sources 22 of light source assembly is separated by color separator 3
The light of three kinds of red light, green light and blue light colors.Specifically, the color separator 3 may include multiple dichronic mirrors,
Multiple total reflection mirrors, as shown in Figure 2, the first dichronic mirror 31 are separated into blue light from from the mixed white light of light source assembly
With the light (red light and green light) other than blue light, blue light is reflected and is inputted after the reflection of the first total reflection mirror 33
To optic modulating device 5；Light (red light and green light) other than blue light reaches second point after transmiting in the first dichronic mirror 31
Look mirror 32, and be separated by the second dichronic mirror 32 and transmitted by the green light and the second dichronic mirror 32 of process that the second dichronic mirror 32 reflects
Red light, green light is input to optic modulating device 5, after red light is reflected by the second total reflection mirror 34 and third total reflection mirror 34
Also input to optic modulating device 5.
First parallel lens 41 are set on blue light to the light of optic modulating device 5, for making blue light directive in parallel
Optic modulating device 5.Similarly, the second parallel lens 42 and third parallel lens 43 respectively correspond green light and red light setting.
Optic modulating device 5 includes red Light modulation element 51, green Light modulation element 52 and blue light modulation component 53, is divided
The light of the multiple color from parallel lens side Yong Yu be modulated, form color diagram corresponding with image information
Picture.Red Light modulation element 51, green Light modulation element 52 and blue light modulation component 53 include liquid crystal display panel and are set to
The incident polarizer of liquid crystal display panel incident side and outgoing polarization piece set on liquid crystal display panel exiting side.
There is from red Light modulation element 51, green Light modulation element 52 and blue light tune incidence in image synthesizer 6
The light of the red of component 53 processed, green and blue, image synthesizer 6 by the corresponding image photosynthesis of the light of multiple color,
Then, image light projection is projected on face 8 by optical projection means 7 by wall, screen etc..
Image synthesizer 6 can be cross colour splitting prism.
In another embodiment, color separator 3 includes rotation colour filter (not shown), rotates the high speed rotation of colour filter
Turn the light for making the mixed white light from light source assembly be separated into different colours.Optic modulating device 5 can be digital micromirror
(DMD, Digital Micromirror Device)).
Next, quasi- natural light LED light source 22 of the invention will be described in detail.
The explanation of technical term：
1. relative spectral power：
A kind of spectrum that light source is emitted is frequently not single wavelength, but by the mixed radiation of many different wave lengths institute
Composition.The spectral radiance of light source is known as the spectral power distribution of light source by wavelength order and the distribution of each Wavelength strength.
Parameter for characterizing spectral power size is divided into absolute spectral power and relative spectral power.And then absolute spectrum
Power distribution curve：Refer to curve made by the various wavelength light energy absolute values with spectral radiance；
Relative spectral power distributions curve：The energy of the various wavelength of radiation of light source spectrum is compared to each other by finger, is made
The spectral power distribution for changing radiant power only within the limits prescribed.The maximum phase of radiant power
It is 1 to spectral power, the relative spectral power of other wavelength is respectively less than 1.
2. color ratio：
Any white light can be mixed to get by Red Green Blue with corresponding proportion, in order to indicate that R, G, B three primary colors are each
Relative scale in comfortable white light total amount introduces chromaticity coordinate r, g, b, wherein r=R/ (R+G+B), g=G/ (R+G+B), b=
B/ (R+G+B), r+g+b=1, r, g, b are respectively red light color ratio, green light color ratio, blue light color ratio.
Fig. 3 to Fig. 6 is please referred to, quasi- natural light LED light source of the invention includes basal layer 210, is set on basal layer 210
At least one set of luminescence component, and the circuit board 230 being electrically connected with luminescence component；Every group of luminescence component includes white-light emitting body
221 white-light emitting bodies 221 and red emitting luminophores 222,221 white-light emitting body 221 of white-light emitting body include blue chip and covering
The fluorescent film of blue chip, red emitting luminophores 222 include red light chips；The white light and red light-emitting that white-light emitting body 221 emits
The feux rouges mixing that body 222 emits, feux rouges are formed quasi- natural for compensating the red light portion that white light is lacked relative to natural spectrum
Light；The relative spectral power of red light is greater than 0.60 in quasi- natural light；The relative spectral power of cyan light is greater than in quasi- natural light
0.30；The relative spectral power of blue light is less than 0.75 in quasi- natural light.
Specifically, it as described above, the basic support construction of quasi- natural light LED light source of the invention is basal layer 210, shines
Component is arranged on basal layer 210, and the quantity of luminescence component is one group, two or more groups, the structure and function of each luminescence component
It can all be consistent.The present embodiment is preferably one group.Each group of luminescence component all includes white-light emitting body 221 and red emitting luminophores
222, that is, quasi- natural light LED light source of the invention, which issues quasi- natural light, to be realized by the mixing of white light and feux rouges.Wherein,
Feux rouges forms the quasi- natural light close to natural light for compensating the part that white light is lacked relative to natural spectrum.This is white
Light illuminator 221 includes blue chip and the fluorescent film for covering blue chip, and red emitting luminophores 222 include at least red light chips,
Wavelength convert is carried out by the monochromatic light that fluorescent film issues blue chip, other coloured light is generated, is formed after a variety of Colored light mixings
Quasi- natural light is formed after white light, the white light and feux rouges mixing.The quasi- natural light has following spectrum parameter, the light relatively of red light
Spectral power is greater than 0.60；The relative spectral power of cyan light is greater than 0.30；The relative spectral power of blue light is less than 0.75.Every group
Luminescence component can issue quasi- natural light, therefore contain multi-group light-emitting component in quasi- natural light LED light source of the invention
In the case of, it can equally issue quasi- natural light.
The wave-length coverage of various coloured light is as follows in visible light：Red light (622~700nm), orange-colored light (597~622nm),
Sodium yellow (577~597nm), green light (492~577nm), cyan light (475~492nm), blue light (435~475nm),
Purple light (380~435nm).
Such as Fig. 7 to Fig. 9, the spectrogram and spectrum test data of quasi- natural light are respectively illustrated, can be seen that by the figure
The spectrum meets the spectrum parameter of above-mentioned feux rouges, green light and blue light, in addition, the ratio of blue light is lowered, close to natural light
Health is also helped simultaneously.With reference to Figure 10, existing near-nature forest light spectrum and natural light spectrum still gap are larger, blue light ingredient
It is higher while clearly disadvantageous in red light portion and the appearance of green light part.
In addition, in the art, according to the rule that a large amount of conventional white light illuminates, white light colour temperature is higher, and shortwave grows up to
The ratio divided is higher, and blue light is higher or even purple light is also higher, and high blue light harm health is the beyond all doubt fact, while high
Colour temperature is conducive to promote identification, promotes the bright sense of environment, the state of mind for promoting people is also generally acknowledged common sense, conventional lighting sources
The usually white light of the high blue light of high color temperature, it is inevitable both advantageous and disadvantageous, it is difficult to take into account the demand of various aspects.According to Fig.8, of the invention
Quasi- natural light LED light source in the high color temperature of 4000K or more, still meet blue light relative spectral power less than 0.75, be
A kind of low blue illumination of high color temperature, is used for projector, can effectively reduce blue light to the injury of human eye and promotes the spiritual shape of people
State, to improve study and work efficiency.
Projection device provided in an embodiment of the present invention at least has the following effects that：
First, the light that the quasi- natural light LED light source that this projector uses issues is more nearly natural light, white compared to tradition
Optical illumination, blue light is lower, and visual experience is more comfortable, is conducive to protect eyesight, especially child and children's vision, also help
It reduces due to the excessively high caused inferior health problem of blue light.
Second, blue light relative spectral power can be controlled in the case where keeping high color temperature and be in reduced levels, can take into account
Eyeshield and promotion visual effect, improve working and learning efficiency.
Third improves green light relative spectral power while reducing blue light, so that quasi- natural light is more nearly really
Natural light, so that projected picture color prevents color distortion more naturally, but also colour rendering index is further promoted.
In the present embodiment, the wave-length coverage of the blue chip is 450-480nm；The wave-length coverage of red light chips is 640-
700nm, the central wavelength of red light chips are preferably 690 ± 5nm.Preferably, the wave-length coverage of blue chip is 457.5-
480nm, at least 457.5-460nm.The embodiment of the present invention breaks through orthodox practice (using 450-455nm blue chip), selection
The blue chip of 457.5nm-480nm is worked along both lines so that the relative spectral power of green light is obviously mentioned in conjunction with fluorescent film
It rises.Simultaneously because the promotion of green light, while promoting aobvious finger R12.Green light relative spectral power such as Figure 12, in traditional near-nature forest light
Lower than 0.3, such as Fig. 7 and Fig. 8, the green light relative spectral power in the present embodiment reaches 0.4 or more.
It show the spectrum of white-light emitting body 221 in the present embodiment with further reference to Figure 11 and Figure 12, Figure 11, uses
When the blue chip of 457.5nm-460nm, green light relative spectral power has reached 0.5 or more, such as uses 457.5nm-480nm
Blue chip, green light relative spectral power can promote further.It is green when using 452.5-455nm blue chip in Figure 12
Light relative spectral is only between 0.35-0.38.
Fluorescent film includes colloid and the fluorescent powder that is mixed in inside colloid, and fluorescent powder includes rouge and powder, green powder and yellowish green powder；It is red
The chromaticity coordinates of powder is X：0.660~0.716, Y：0.340~0.286；The chromaticity coordinates of green powder is X：0.064~0.081, Y：
0.488~0.507；The chromaticity coordinates of yellowish green powder is X：0.367~0.424, Y：0.571~0.545；Rouge and powder, green powder and yellowish green powder
Weight ratio be：Rouge and powder：Green powder：Yellowish green powder=(0.010~0.035):(0.018~0.068):(0.071~0.253)；It is glimmering
The concentration of light film is 17%~43%.The partial size of rouge and powder, green powder and yellowish green powder is respectively less than 15 μm, preferably 13 ± 2 μm.
By selecting above-mentioned blue chip and fluorescent film, white light can be obtained, spectrum is as shown in figure 11.It has as follows
Optical parameter：When colour temperature is 2700K-3000K, the relative spectral power of 480-500nm wave band is greater than 0.30；500-640nm wave
The relative spectral power of section is greater than 0.70；When colour temperature is 4000K-4200K, the relative spectral power of 480-500nm wave band is greater than
0.45；The relative spectral power of 500-640nm wave band is greater than 0.65；When colour temperature is 5500K-6000K, 480-500nm wave band
Relative spectral power is greater than 0.4；The relative spectral power of 500-640nm wave band is greater than 0.60.This white-light emitting body 221 with it is upper
The combination of red emitting luminophores 222 is stated, available quasi- natural light LED light source can issue quasi- natural light.
Further, with reference to Fig. 9 and Figure 10, the spectrum of quasi- natural light LED light source of the invention its all band also and from
Its is similar for right optrode, and existing near-nature forest radiant is then difficult to realize.Such as Fig. 7 and Fig. 8, the light relatively of orange-colored light in quasi- natural light
Spectral power is greater than 0.55；The relative spectral power of sodium yellow is greater than 0.50；The relative spectral power of green light is greater than 0.35；Purple
The relative spectral power of light is close with natural light less than 0.10.
In addition, quasi- natural light LED light source of the invention while each band spectrum more optimizes, also has stringent light
Learn parameter request, such as colour temperature, color tolerance, colour rendering index Ra, colour rendering index R9, colour rendering index R12 and blue light color ratio etc..Tool
Body, the colour temperature of quasi- natural light includes 2500K-6500K, and color tolerance is less than 5, and blue light color ratio is less than 5.7%.It is aobvious to refer to that Ra is greater than
95, wherein aobvious finger of the aobvious finger of R9 greater than 90, R12 is greater than 80.Quasi- natural light LED light source of the invention can be determined according to Fig. 8
It can satisfy above-mentioned requirements, and the blue light color ratio of quasi- natural light LED light source of the invention can be reduced to 5.5% hereinafter, aobvious
Colour index Ra is increased to 97 or more, and colour rendering index R9 reaches 95 or more, and colour rendering index R12 has reached 83, in other test report
In, colour rendering index R12 can achieve 87.
Further, the blue light of 440nm is maximum to the injury of eyesight in blue light, as further prioritization scheme, this reality
Example is applied also using the relative spectral power of 440nm blue light as optical parameter to be detected.The case where blue light color ratio is lower than 5.7%
Under, the relative spectral power of 440nm blue light is lower than 0.65.When the colour temperature of quasi- natural light of the invention is 2700K-3000K,
The relative spectral power of 440nm blue light is lower than 0.50, when the colour temperature of near-nature forest light is 4000K-4200K, 440nm blue light it is opposite
Spectral power is lower than 0.60, and when the colour temperature of near-nature forest light is 5500K-6000K, the relative spectral power of 440nm blue light is lower than
0.65.This is that existing projection device is difficult to realize.In existing projection device, the blue light color ratio of light source is although lower,
But the inhibition for wherein injuring maximum 440nm blue light to human eye is not obvious, eye-protecting function is very little.And its in blue light
All band ingredient is necessary visual acuity, and significantly inhibiting blue light, not only eyeshield effect is unobvious, can also be to children, child
The visual acuity of equal crowds causes adverse effect, such as due to the excessive missing of blue light ingredient, leads to anomalous trichromatism, chromatic discrimination power decline
The problems such as.
The present invention is to carry out a large amount of pilot scale study using above-mentioned optical parameter and spectrum as target, final to determine using above-mentioned
White-light emitting body 221 and red emitting luminophores 222, and the luminous flux and red emitting luminophores 222 of white-light emitting body 221 has been determined
The ratio between light radiation the luminous system of appropriate size and quantity is chosen based on the determining corresponding electrical parameter of the ratio and experiment
Make above-mentioned light source.
It is preferred that miniature white-light emitting body 221 and red emitting luminophores 222 are used, according to the big of light flux ratio and installation space
Small selection small dimension and the higher blue chip of cost performance and red light chips, preferential selection 222 He of red emitting luminophores few as far as possible
White-light emitting body 221, is fabricated to single light source, and one group of luminescence component is arranged in a light source.Since the light source can be issued directly
Quasi- natural light, and then can be used in various lamps and lanterns, any combination, it can guarantee its preferable illumination effect, it is adaptable.When
So, multi-group light-emitting component can also be integrated in a light source, still can guarantee preferable light-out effect at this time, only size increases
Greatly.
Preferably, white-light emitting body 221 and red emitting luminophores 222 can use the miniature illuminator for meeting performance requirement,
The miniature lamp bead of light source generally one, can multiple lamp beads be arranged on the circuit board 230 of various lamps and lanterns with arbitrary form, due to its body
Product is small and exquisite, may be disposed at any position of circuit board 230, and flexible in application, lamps and lanterns Integral luminous is uniform, good illumination effect, is applicable in
In the volume miniaturization of projection device.
Specifically, the ratio between light radiation of the luminous flux of the white-light emitting body 221 and red emitting luminophores 222 is 2-10:1,
Preferably 2-3:1.Under different colour temperatures, which slightly floats.In one embodiment, the quantity of white-light emitting body 221
Quantity ratio with red emitting luminophores 222 is 1-8:1, further preferably 1-4：1.The light radiation of practical red emitting luminophores 222
For 80-160mW, the total light flux of white-light emitting body 221 is 200-350lm.
In one embodiment, there are four white-light emitting bodies 221, red emitting luminophores 222 have one, four white-light emitting bodies
221 are set to around red emitting luminophores 222 and are uniformly distributed.
In another embodiment, there are two white-light emitting bodies 221, red emitting luminophores 222 have one, two white-light emittings
Body 221 is symmetrically disposed on the two sides of red emitting luminophores 222.
About the mounting means of chip, preferably by blue chip and red light chips upside-down mounting in the surface of basal layer 210, upside-down mounting
Chip is conducive to effectively connect with the circuit board 230 on basal layer 210, is conducive to high efficiency and heat radiation, can be by equipment in chip
Upper unified film forming, guarantees that the fluorescent film consistency of different product is good, and then can cause one to avoid the dispensing process of formal dress chip
The problem of cause property difference, meanwhile, so that different product is in same BIN when colour temperature is identical, colour temperature consistency is good.
In addition, flip-chip but also the volume of white-light emitting body 221 further decreases, is conducive to dimension of light source control.
In the present embodiment, the width of white-light emitting body 221 is less than 0.8mm, is highly less than 0.3mm, and red emitting luminophores 222 are can be controlled in
In same range.Adjacent white-light emitting body 221 and 222 spacing of red emitting luminophores is 1mm or less.Quasi- natural light of the invention
The length of LED light source is less than or equal to 6mm, and width is less than 3mm.
Certainly, the present invention is not limited to using flip-chip, is also feasible using positive cartridge chip.
In one embodiment, basal layer 210 is preferably the lamellar structure of nonmetallic materials production, is set on basal layer 210
There is reflector 211, white-light emitting body 221, red emitting luminophores 222 are set in reflector 211, and circuit board 230 is formed in substrate
The surface of layer 210, and the tow sides of basal layer 210 are wrapped in, and pin is formed except reflector 211, reflector 211
Bottom exposed portion circuit board 230, for being connect with white-light emitting body 221 and red emitting luminophores 222.
Further, the inner wall of reflector 211 is equipped with reflective surface 2111, is also filled with packaging plastic inside reflector 211
Body (not shown), reflective surface 2111 is for reflecting white light and feux rouges, and packing colloid is for protecting 211 internal junction of reflector
Structure and keep light-source structure more stable, and refraction adjustment is carried out to light.White light and feux rouges be sufficiently mixed after by packing colloid
Output.Specifically, the light emitting angle of white-light emitting body 221 and red emitting luminophores 222 can be 160 ° or so to 180 °, light source
Light-emitting angle is 120 ° or so.Entire light source is the quasi- natural light lamp bead of small-sized uniformly light-emitting.
In the present embodiment, circuit board 230 has several groups positive and negative anodes pin, can corresponding one group of each illuminator it is positive and negative
Pole pin or the corresponding one group of positive and negative anodes pin of several illuminators.In driving method, there are two types of implementations, first, white
Light illuminator 221 and red emitting luminophores 222 are separately connected different positive and negative anodes pins, are operated alone, at this time respective driving electricity
Stream is different, and control chip can be cooperated to be controlled.Second, white-light emitting body 221 and red emitting luminophores 222 are connected, that is, connect
Identical positive and negative anodes pin, unified same current driving are not required to control chip and are controlled.The mode of this unified driving is obvious
It with apparent advantage, does not need to configure different driving currents for different illuminators, does not need to increase control circuit board
230, it is only necessary to power according to its corresponding electric current.Therefore, more simplified in structure, volume further decreases, application
Easier to be flexible, cost is lower.This is currently preferred 230 connection scheme of circuit board.
With reference to Fig. 3 and Fig. 4, two white-light emitting bodies 221 and a red emitting luminophores 222 are connected, two white-light emitting bodies
221 are separately connected first pin 231, and 231 self-reflection cup of the first pin, 211 bottom is stretched out, for connecting external power supply.It is red
Light illuminator 222 is series between two white-light emitting bodies 221.
Further, which is also provided with second pin 232, which is not used in connection external power supply,
But be used to radiate, and promote the symmetry of light source entirety, the stability for promoting intensity and being installed on circuit board 230.
Further, the relative spectral power of the 640-700nm feux rouges of LED light source of the invention is obviously improved,
This is difficult to realization in existing near-nature forest radiant.Such as Fig. 7, wavelength is the feux rouges relative spectral power of 680~690nm
Greater than 0.80；The feux rouges relative spectral power that wavelength is 622~680nm is greater than 0.60.Such as Figure 10 and Figure 13, traditional near-nature forest light
Light source the trend being decreased obviously can occur in the wave band after 640nm.640-700nm feux rouges has excellent health care, physical therapy, beauty
Appearance effect.The light source is suitable for handling official business, lighting of home and needs high proportion feux rouges and the Code in Hazardous Special Locations close to natural lighting.
Also, by the test of different-colour light source, when the colour temperature of quasi- natural light is 2700K-3000K, 640-700nm is red
The relative spectral power of light is greater than 0.70；When the colour temperature of quasi- natural light is 4000K-4200K, the light relatively of 640-700nm feux rouges
Spectral power is greater than 0.60；When the colour temperature of quasi- natural light is 5500K-6000K, the relative spectral power of 640-700nm feux rouges is greater than
0.50。
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of projection device, which is characterized in that including shell and be set to the intracorporal light supply apparatus of shell, color separated dress
It sets, optic modulating device, image synthesizer and optical projection means；The light supply apparatus includes one or more quasi- natural lights
LED light source, the quasi- natural light LED light source issue quasi- natural light；The color separator is for making the quasi- natural light point
From the light at multiple color；The optic modulating device is for being converted into the light of the multiple color to be used to indicate image
Modulation light；Described image synthesizer is for making the modulation light of multiple color synthesize image light；The optical projection means are used
In by described image light projection to being projected on face；The relative spectral power of red light is greater than 0.60 in the quasi- natural light；Institute
The relative spectral power for stating cyan light in quasi- natural light is greater than 0.30；The relative spectral power of blue light is small in the quasi- natural light
In 0.75；Blue light color ratio in the quasi- natural light is less than 5.7%；The colour rendering index of the quasi- natural light is greater than 95.
2. projection device as described in claim 1, which is characterized in that the color separator and the optic modulating device it
Between be additionally provided with parallel lens device, be incident upon the optic modulating device for dissolving into the light ray parallel of each color.
3. projection device as described in claim 1, which is characterized in that the optic modulating device include red Light modulation element,
Green Light modulation element and blue light modulation component, the red Light modulation element, green Light modulation element and blue light modulation
Component include liquid crystal display panel and set on liquid crystal display panel incident side incident polarizer and set on liquid crystal display panel exiting side go out
Penetrate polarizing film；Alternatively, the optic modulating device includes digital micromirror.
4. projection device as described in claim 1, which is characterized in that the color synthesizer includes cross colour splitting prism.
5. projection device as described in claim 1, which is characterized in that the quasi- natural light LED light source includes basal layer, setting
In at least one set of luminescence component on the basal layer, and the circuit being electrically connected with the luminescence component；It shines described in every group
Component includes white-light emitting body and red emitting luminophores, and the white-light emitting body includes blue chip and the covering blue chip
Fluorescent film, the red emitting luminophores include red light chips；The white light and the red emitting luminophores of the white-light emitting body transmitting are sent out
The feux rouges mixing penetrated, the feux rouges are formed quasi- natural for compensating the red light portion that the white light is lacked relative to natural spectrum
Light.
6. projection device as claimed in claim 5, which is characterized in that the white-light emitting body and red emitting luminophores pass through identical
Driving current unified driving.
7. projection device as described in claim 1, which is characterized in that in the luminescence component described in one group, the white-light emitting
The quantity of body and the quantity of red emitting luminophores ratio are 1~8:1, the total light flux and the feux rouges of the white-light emitting body are sent out
Total light radiation ratio of body of light is 2-10:1.
8. projection device as described in claim 1, which is characterized in that the relative spectral of 440nm blue light in the quasi- natural light
Power is lower than 0.65.
9. projection device as claimed in claim 8, which is characterized in that when the colour temperature of the quasi- natural light is 2700K-3000K,
The relative spectral power of 440nm blue light is lower than 0.50；
When the colour temperature of the quasi- natural light is 4000K-4200K, the relative spectral power of 440nm blue light is lower than 0.60；
When the colour temperature of the quasi- natural light is 5500K-6000K, the relative spectral power of 440nm blue light is lower than 0.65.
10. projection device as described in claim 1, which is characterized in that in the quasi- natural light, the aobvious finger of R9 is greater than 90, R12
Aobvious finger be greater than 80.
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|---|---|---|---|
| CN201810680333.1A CN108828888A (en) | 2018-06-27 | 2018-06-27 | A kind of projection device |
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| CN201810680333.1A CN108828888A (en) | 2018-06-27 | 2018-06-27 | A kind of projection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023123324A1 (en) * | 2021-12-31 | 2023-07-06 | 深圳易联智能电气有限公司 | Light source assembly and light supplementing device |
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Application publication date: 20181116 |