CN109839796A - Micro projector illumination path - Google Patents
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- CN109839796A CN109839796A CN201910291318.2A CN201910291318A CN109839796A CN 109839796 A CN109839796 A CN 109839796A CN 201910291318 A CN201910291318 A CN 201910291318A CN 109839796 A CN109839796 A CN 109839796A
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Abstract
The present invention relates to micro projector fields.The technical problem to be solved by the present invention is to improve the luminous quantities of green-light source in triple channel micro projector, increase the output overall brightness of projector.The specific fluorescent powder of its technical solution realized to be using the luminosity of green-light source in projector be blue light deexcitation chip surface that the light source chip issues and the principle of luminosity for issuing a large amount of green lights, the light that light source issues is after collimation lens set collimates, using dichroscope by light blue spectrum and green spectrum separate, and use reflecting mirror by blue spectrum backtracking, green-light source surface excitation fluorescent powder is gathered again, to enable green-light source to issue more green lights, and then improve the overall brightness of micro projector.
Description
Technical field
The present invention relates to micro projector fields.
Background technique
With the development of science and technology, the portability of micro projector gradually comes into huge numbers of families, and with the liter of LED light source
Grade, the brightness of micro projector are also being gradually increased, and become popular household consumption product.Conventional triple channel micro projector
Illumination path as shown in Figure 1, the light that issues of three light sources 101,102,103 for issuing red, green, blue color respectively by quasi-
After straight lens group 201,202,203, wherein 102 and 103 light is saturating by relaying after first 301 light combination of dichroscope
Mirror 4, the light then issued with 101 synthesize a branch of collimated ray at second dichroscope 302 and are incident in fly's-eye lens 5
Light mixing is carried out, the RGB light of even light mixing is thus obtained.
In the development of green LED amount, it has been found that practical blue light excites specific fluorescent powder available a large amount of
Wavelength is in the spectrum of 490nm~570nm, and wherein the luminous quantity of green light shines than single unit area using Green-emitting semiconductor chip
Amount is also big, and this green-light source is identified as CG(Converted Green), there is specific fluorescent powder on LED chip surface, sends out
Green light out is the green light after conversion, and the curve of spectrum is as shown in figure 4, wherein solid line is that the spectrum in the light of light source sending is bent
Line, dotted line are the human eye photoactive spectrum of entire light beam.This light source starts to be used in micro projector, and derives at present
Four-way projection lighting optical path, as shown in Figure 2.Wherein use two blue-ray LEDs, respectively 103 and 104, wherein 103 be responsible for
To provide blue color spectrum in mixing light, 104 blue rays issued are after collimation lens set 204, and blue color spectrum is by the
A piece of dichroscope 301 reflects, and after collimation lens set 202 on focusing illumination to green-light source 102, and excites chip surface
Fluorescent powder, promote the more green spectrums of 102 sendings, and be pooled in entire illumination path.
The projection output brightness of four-way projection lighting optical path described in Fig. 2 can be than the triple channel mode described in Fig. 1 about
High by 1 15, newly-increased LED chip and collimation lens set can bring increased costs, and increase the cost of LED control and answer
Miscellaneous degree.
Summary of the invention
The purpose of the present invention is to propose to a kind of micro projector illumination path modes, in the case where not increasing driving power
The luminous quantity of green-light source is improved, and then improves the overall brightness of micro projector.
To achieve the above object, the technical scheme is that micro projector illumination path, including the micro- throwing of DLP and
The illumination path of the micro- throwing of Lcos, using redgreenblue LED light source, three groups of collimation lens sets, a piece of relay lens, two panels two to
Look mirror, a piece of fly's-eye lens, and a piece of reflecting mirror is used, collectively constitute the micro projector illumination path.
Specifically, the characteristics of luminescence of green-light source is the green light after conversion, light source is identified as CG(Converted
Green), i.e., the blue ray that the wavelength that LED chip issues is 410nm~450nm, the light of the wave band excite the spy on chip
Determine fluorescent powder, fluorescent powder issues the green light that a large amount of spectrum are 490nm~570nm after being swashed by blue light.The green-light source is in total
The curve of spectrum of emitted light contains the blue light light of one section of spectrum 410nm~450nm.
Specifically, three light sources of red, green, blue are equipped with individual collimation lens set.
Further, the direction of propagation of dichroscope and light is in 45 °, the transmitted spectrum and reflected light spectrality of dichroscope
Matter will be matched with the installation site of light source, in order to separate blue spectrum in green light and finally by three kinds of coloured light of red, green, blue
It is merged into a branch of.
Specifically, green-light source issue light after collimation, dichroscope by light blue spectrum and green light light
Spectrum separation.
Further, it is impinged perpendicularly at reflecting mirror by isolated blue spectrum, along backtracking after reflecting mirror reflects,
It by dichroscope and collimation lens set, is irradiated in green-light source, and excitated fluorescent powder, issues green-light source more green
Light.
Further, three kinds of coloured light are formed described miniature by vertical incidence after two panels dichroscope light combination into fly's-eye lens
Projector illumination optical path.
Wherein, relay lens is in the region between two panels dichroscope.
Detailed description of the invention
Fig. 1 is a kind of triple channel projector illumination optical path of the prior art.
Fig. 2 is a kind of four-way projector illumination optical path of the prior art.
Fig. 3 is the luminous curve of spectrum of the green-light source of the prior art.
Fig. 4 is the micro projector illumination path schematic diagram of the embodiment of the present invention 1.
Fig. 5 is the micro projector illumination path schematic diagram of the embodiment of the present invention 2.
Fig. 6 is the micro projector illumination path schematic diagram of the embodiment of the present invention 3.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and embodiments.
Micro projector illumination path of the invention is applied to DLP and Lcos micro projector, uses redgreenblue
LED light source, three groups of collimation lens sets, a piece of relay lens, two panels dichroscope, a piece of fly's-eye lens, and use a piece of reflection
Mirror collectively constitutes the micro projector illumination path.
Wherein the characteristics of luminescence of green-light source is the green light after conversion, and light source is identified as CG(Converted Green), i.e.,
The wavelength that LED chip issues is the blue ray of 410nm~450nm, the specific fluorescent powder on the light excitation chip of the wave band,
Fluorescent powder issues the green light that a large amount of spectrum are 490nm~570nm after being swashed by blue light.Green-light source emitted light in total
The curve of spectrum as shown in figure 3, containing the blue light light of one section of spectrum 410nm~450nm.
Embodiment 1
As shown in figure 4, having the light source of three kinds of colors of RGB, three groups of collimation lens sets, a piece of relay lens, two panels in this example
Dichroscope, a piece of fly's-eye lens and a piece of reflecting mirror collectively constitute, and red, green, blue light source is respectively 101,102,103, red green
The light that blue three kinds of light sources issue is synthesized a branch of after collimation lens set 201,202,203 by two panels dichroscope 301,302
Light is irradiated into fly's-eye lens 5.
In the present embodiment, the property of first dichroscope is thoroughly blue anti-red green when principal rays are at 45 ° incident, i.e., should
Dichroscope is corresponding irradiate in the direction into luminous ray, it is seen that the blue light components in light pass through the dichroscope, and green
Light and feux rouges will be reflected by the dichroscope；The property of second dichroscope is anti-when at 45 ° incident for principal rays to be popular in indigo plant
It is green, i.e., irradiate in the direction into visible light, wherein blue light and green light pass through the dichroscope, and red light portion will be anti-
It penetrates.
As described above, the light that green light 102 and blue light 103 issue, after collimation lens set 201 and 202, at first
A branch of bluish-green mixing light is synthesized at dichroscope 301, after relay lens 4, is issued with collimated red-light source 101
Feux rouges a branch of light containing three kinds of colors of RGB is synthesized at second dichroscope 302, common irradiation is saturating into compound eye
Mirror.
Wherein, contain blue color spectrum in the luminescent spectrum of green-light source 102, by above-mentioned first dichroic after collimation
When mirror 301, blue light impinges perpendicularly on reflecting mirror 6 after penetrating 301, and along backtracking, is again passed through 301, saturating using collimation
After microscope group 201, light-ray condensing excites the fluorescent powder in green-light source on the surface of light source 102 again, makes 102 sendings more
More green lights, these green lights are being reflected after collimation lens set 202 by dichroscope 301, pass through relay lens 4
With second dichroscope 302, with original redgreenblue light common irradiation into fly's-eye lens 5.More than, it collectively forms
Micro projector illumination path of the present invention.
Embodiment 2
As shown in figure 5, the present embodiment is the location of green-light source 102 and two panels dichroscope compared to embodiment 1
301 property has differences.
In the present embodiment, the installation direction of green-light source is face fly's-eye lens.The property of first dichroscope 301
It is anti-blue thoroughly red green when at 45 ° incident for principal rays, i.e., the dichroscope it is corresponding irradiate in the direction into luminous ray, it is seen that
Green light and red light portion in light pass through the dichroscope 301, and blue light components will be reflected by the dichroscope 301.
Green light light synthesizes a branch of bluish-green light with blue light light at dichroscope 301, after passing through relay lens 4, with
Feux rouges light merges into a branch of light containing three kinds of colors of RGB at 302.
Wherein, the blue spectrum that the light of the sending of green-light source contains is reflected at first dichroscope 301, vertically
Be incident on reflecting mirror 6, light by reflecting mirror 6 reflect after along backtracking, when by first dichroscope 301, blue light light
Spectrum is again reflected, and gathers 102 surface of green-light source after converging using collimation lens set 202, again excitated fluorescent powder, is promoted
Make the more green lights of 102 sendings, which passes through collimation lens set 202, passes through first dichroscope 301, wears
After crossing relay lens 4 and second dichroscope 302, in original redgreenblue light common irradiation compound eye 5, this is constituted
The micro projector illumination path of embodiment.
Embodiment 3
As shown in fig. 6, the present embodiment is the peace of red-light source 101, blue light source 103 and reflecting mirror compared to embodiment 1
Holding position is different, and the property of two panels dichroscope 301 and 302 also with the difference in embodiment 1.
In the present embodiment, reflecting mirror installation is right against the installation of blue light source 103, the property of first dichroscope 301
It is thoroughly red anti-bluish-green when for 45 degree of incidence of principal rays, i.e., the dichroscope it is corresponding irradiate in the direction into luminous ray, it is seen that
Red light portion in light passes through the dichroscope 301, and green light and blue light components will be reflected by the dichroscope 301, and second
The property of piece dichroscope 302 is anti-blue thoroughly red green when being 45 degree of incidence of principal rays, i.e., the dichroscope it is corresponding in the direction according to
The luminous ray injected, it is seen that feux rouges and green portions in light pass through the dichroscope 302, and blue light components will by this two
It is reflected to Look mirror 302.
Green light light synthesizes a branch of red green mixed light with feux rouges light at dichroscope 301, passes through relay lens 4
Afterwards, a branch of light containing three kinds of colors of RGB is merged at 302 with blue light light.
Wherein, the blue spectrum and green spectrum that the light of the sending of green-light source contains are in first dichroscope 301
Place is reflected, and passes through relay lens 4, at second dichroscope 302, the blue color spectrum in light vertically enters after being reflected
It is mapped at reflecting mirror 6, it is saturating to pass through relaying by being again reflected when second dichroscope 302 by backtracking for blue color spectrum
Mirror 4 converges to 102 surface of green-light source, and excite glimmering by being reflected again when dichroscope 301 after collimation lens set 202
Light powder, the green light excited are passing through 4, second 202, first dichroscopes 301 of collimation lens, relay lens relay lens
After 302, in original redgreenblue light common irradiation compound eye 5, the micro projector illumination path of this embodiment is constituted.
Claims (7)
1. micro projector illumination path, the illumination path including DLP micro- throwing and the micro- throwing of LCOS, it is characterised in that: using red green
Blue three-color LED light source, three groups of collimation lens sets, a piece of relay lens, two panels dichroscope, a piece of multiple eyeglass lens, and use
The micro projector illumination path that a piece of reflecting mirror collectively constitutes.
2. illumination path as described in claim 1, the light that wherein green-light source issues is that blue light excites the specific glimmering of its surface
Light powder, fluorescent powder issue green light after being excited, in the luminescent spectrum of the green-light source comprising blue wave band and and green light band, this is green
Radiant is identified as CG(Converted Green).
3. illumination path as described in claim 1, the light that green-light source issues be collimated after lens group collimation by two to
Look mirror, so that the blue spectrum and green spectrum in light are separated by dichroscope, wherein the blue spectrum after being separated is vertical
It is incident on after reflecting mirror by backtracking, comes back at green-light source position and excite the fluorescent powder on its surface.
4. illumination path as described in claim 1, collimation lens set respectively carries out the light that red, green, blue light source issues quasi-
Straight correction.
5. illumination path as described in claim 1, the mounting means of dichroscope and paths direction are in 45 °, dichroic
The reflectance spectrum of mirror and the property of transmitted spectrum are determined by the position where red, green, blue light source.
6. illumination path as described in claim 1, relay lens is in the region between two panels dichroscope.
7. the illumination path as described in the claims 1~6, the light that light source issues after collimation lens set collimates,
The blue spectrum contained in the light that middle green-light source issues is separated and is reflected by a reflector by dichroscope, is returned to along road green
Radiant surface, the specific fluorescent powder on excitation light source surface generates more green light light again, and then three kinds of coloured light are by two panels
Vertical incidence forms micro- throwing illumination path into fly's-eye lens after dichroscope light combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910291318.2A CN109839796A (en) | 2019-04-11 | 2019-04-11 | Micro projector illumination path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910291318.2A CN109839796A (en) | 2019-04-11 | 2019-04-11 | Micro projector illumination path |
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| CN109839796A true CN109839796A (en) | 2019-06-04 |
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| CN201910291318.2A Pending CN109839796A (en) | 2019-04-11 | 2019-04-11 | Micro projector illumination path |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110673430A (en) * | 2019-10-11 | 2020-01-10 | 山西汉威激光科技股份有限公司 | Large-color-gamut laser light source system integrated through trapped wave beam combination |
| WO2020253165A1 (en) * | 2019-06-20 | 2020-12-24 | 青岛海信激光显示股份有限公司 | Laser light source and laser projection device |
| US11079665B2 (en) | 2019-03-20 | 2021-08-03 | Hisense Laser Display Co., Ltd. | Laser projection apparatus |
| CN113608402A (en) * | 2021-08-11 | 2021-11-05 | 四川长虹电器股份有限公司 | Lighting device and micro projector |
| US11237468B2 (en) | 2019-06-20 | 2022-02-01 | Hisense Laser Display Co., Ltd. | Laser projection apparatus |
| CN114200748A (en) * | 2021-12-10 | 2022-03-18 | 广景视睿科技（深圳）有限公司 | Miniature projection optical machine |
| CN114217497A (en) * | 2021-12-10 | 2022-03-22 | 广景视睿科技（深圳）有限公司 | Miniature projection optical machine |
| CN114236951A (en) * | 2021-12-10 | 2022-03-25 | 广景视睿科技（深圳）有限公司 | Miniature projection optical machine |
| CN115373199A (en) * | 2022-07-08 | 2022-11-22 | 深圳市科金明电子股份有限公司 | Adjustable reflective ultrashort burnt 2LCD projector |
| CN115453811A (en) * | 2022-11-10 | 2022-12-09 | 深圳市橙子数字科技有限公司 | Projection lighting device with high stability |
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2019
- 2019-04-11 CN CN201910291318.2A patent/CN109839796A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11079665B2 (en) | 2019-03-20 | 2021-08-03 | Hisense Laser Display Co., Ltd. | Laser projection apparatus |
| WO2020253165A1 (en) * | 2019-06-20 | 2020-12-24 | 青岛海信激光显示股份有限公司 | Laser light source and laser projection device |
| US11237468B2 (en) | 2019-06-20 | 2022-02-01 | Hisense Laser Display Co., Ltd. | Laser projection apparatus |
| CN110673430A (en) * | 2019-10-11 | 2020-01-10 | 山西汉威激光科技股份有限公司 | Large-color-gamut laser light source system integrated through trapped wave beam combination |
| CN113608402A (en) * | 2021-08-11 | 2021-11-05 | 四川长虹电器股份有限公司 | Lighting device and micro projector |
| CN114200748A (en) * | 2021-12-10 | 2022-03-18 | 广景视睿科技（深圳）有限公司 | Miniature projection optical machine |
| CN114217497A (en) * | 2021-12-10 | 2022-03-22 | 广景视睿科技（深圳）有限公司 | Miniature projection optical machine |
| CN114236951A (en) * | 2021-12-10 | 2022-03-25 | 广景视睿科技（深圳）有限公司 | Miniature projection optical machine |
| CN115373199A (en) * | 2022-07-08 | 2022-11-22 | 深圳市科金明电子股份有限公司 | Adjustable reflective ultrashort burnt 2LCD projector |
| CN115453811A (en) * | 2022-11-10 | 2022-12-09 | 深圳市橙子数字科技有限公司 | Projection lighting device with high stability |
| CN115453811B (en) * | 2022-11-10 | 2023-01-13 | 深圳市橙子数字科技有限公司 | Projection lighting device with high stability |
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