CN101285998A - Light source module - Google Patents
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- CN101285998A CN101285998A CNA2007100967819A CN200710096781A CN101285998A CN 101285998 A CN101285998 A CN 101285998A CN A2007100967819 A CNA2007100967819 A CN A2007100967819A CN 200710096781 A CN200710096781 A CN 200710096781A CN 101285998 A CN101285998 A CN 101285998A
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Abstract
The invention provides a light source module, which is applied in a scan-typed projection device. The light source module comprises a plurality of pointolites and at least one shading unit. Each pointolite is applicable for providing a chromatic light; the chromatic lights are combined into a synthesis light beam; furthermore, the chromatic lights have different colours. At least one shading unit is applicable for cutting-in at least one transmission path of the chromatic lights with fixed frequency so as to shade part of chromatic lights.
Description
Technical field
The present invention relates to a kind of light source module, and particularly relate to a kind of light source module that is applicable to scan-type projection arrangement (scanning projection apparatus).
Background technology
Please refer to Figure 1A and Figure 1B, existing a kind of scan-type projection arrangement 100 comprises light source module 110 and eyeglass 120, the light beam 112 that it can send light source module according to the input signal of desire display image, see through and to produce deflection along the eyeglass 120 of two axial wobbles, so that light beam 112 is projected to positions different on the screen 30 successively and forms image.
In more detail, if the image analytic degree that 100 projections of scan-type projection arrangement go out is M * N (promptly having M * N pixel), then eyeglass 120 can be projected to light beam 112 the position P (1 on the screen 30 successively, 1), position P (1,2) ... position P (1, N) ... position P (2,1), position P (2,2) ... position P (M, N-1), position P (M, N).In addition, if when the renewal frequency of image is 60 hertz (Hz), light source module 110 must send the light beam 112 that M * N road light intensity is different successively in 1/60 second.
Please refer to Fig. 2, existing light source module 110 comprises red laser (red laser) 114r, green laser 114g, blue laser 114b and X prism (X-prism) 116.Red laser 114r, green laser 114g and blue laser 114b can provide ruddiness 112r, green glow 112g and blue light 112b respectively.In addition, but the light splitting surface 116a reflect blue 112b of X prism 114 also makes green glow 112g and ruddiness 112r passes through, and but the light splitting surface 116b reflect red 112r of X prism 114 and make green glow 112g and blue light 112b passes through so can make ruddiness 112r, green glow 112g and blue light 112b be merged into light beam 112.
Hold above-mentioned, need utilize the modulation of laser intensity when scan-type projection arrangement 100, with as the application of image gray scale the time, light source module 110 must send M * N road light beam 112 successively according to the input signal of desiring display image in 1/60 second, thus the light intensity modulation frequency of red laser 114r, green laser 114g and blue laser 114b be necessary for 60 * (M * N) hertz.With resolution is 1024 * 768 to be example, and then the light intensity modulation frequency must be greater than 47 megahertzes (MHz).And present red laser 114r and green laser 114g can adjust light intensity greater than the frequency utilization modulation drive current of 47 megahertzes (MHz), but the light intensity modulation frequency of green laser 114g can't reach 47 megahertzes, so can between green laser 114g and X prism 116, set up light intensity varying element 118 in the prior art, to come the light intensity of modulation green glow 112g by the mode of outside modulation.
In the prior art, common outside modulation mode is for using electric light modulation (the electro-optical modulation of electro-optic crystal (electro-opticalcrystal) as light intensity varying element 118, EOM), or use acousto-optic crsytal (acoustic-optical crystal) as the acousto-optic modulation of light intensity varying element 118 (acoustic-optical modulation, AOM).Yet because the manufacturing of electro-optic crystal and acousto-optic crsytal is difficult for, cost is also higher, so can improve the cost of light source module 100.Therefore in addition, utilize the mode of electric light modulation or acousto-optic modulation need consume bigger power (about 1 watt), waste energy, and be unfavorable for being applied in and utilize in the battery powered scan-type projection arrangement.In addition, green glow 112g need put in order bundle and can cause extra energy loss by electro-optic crystal or acousto-optic crsytal.
Summary of the invention
Purpose of the present invention provides a kind of light source module, and its cost is lower and save the energy.
Other purposes of the present invention and advantage can be further understood from disclosed technical characterictic.For reaching one of above-mentioned or partly or entirely purpose or other purposes, embodiments of the invention propose a kind of light source module, and it is applicable in the scan-type projection arrangement.Light source module comprises a plurality of pointolites and at least one lightproof unit (light blocking unit).The every bit light source is suitable for providing a shade, and these coloured light are merged into synthetic light beam.Lightproof unit is suitable for fixing frequency incision and cuts off the coloured light bang path of one of them at least, with shield portions coloured light.Fixing frequency is meant the light intensity modulation frequency of correspondence image resolution and image update frequency.
The present invention utilizes the bang path of lightproof unit with fixing frequency incision a shade, with shield portions coloured light, and then reaches the purpose of modulation light intensity modulation.Therefore compare with the light intensity varying element of prior art, the cost of lightproof unit of the present invention is lower, can reduce the cost of light source module, and the energy of consumption is lower when move because of lightproof unit, so light source module of the present invention is saved the energy.
Description of drawings
Figure 1A is the synoptic diagram of existing a kind of scan-type projection arrangement.
Figure 1B is the synoptic diagram of the scan-type projection arrangement of Figure 1A with light beam projecting diverse location on screen.
Fig. 2 is the synoptic diagram of the light source module of Fig. 1.
Fig. 3 is the synoptic diagram of a kind of light source module of the embodiment of the invention.
Fig. 4 A be among Fig. 3 first pointolite to the arrangements of components figure that closes between the light unit.
Fig. 4 B is the action synoptic diagram of lightproof unit among Fig. 4 A.
Fig. 5 is the synoptic diagram of the lightproof unit of another embodiment of the present invention.
Fig. 6 is the synoptic diagram of the lightproof unit of another embodiment of the present invention.
Fig. 7 A to Fig. 7 C be the present invention in addition first pointolite of the light source module of three embodiment to the arrangements of components figure that closes between the light unit.
Fig. 8 A is that first pointolite of light source module of further embodiment of this invention is to the arrangements of components figure that closes between the light unit.
Fig. 8 B is the action synoptic diagram of lightproof unit among Fig. 8 A.
Fig. 9 is the synoptic diagram of the light source module of another embodiment of the present invention.
The simple symbol explanation
30: screen
50,60: arrow
100: the scan-type projection arrangement
110,200,200a: light source module
112: light beam
112r: ruddiness
112g: green glow
112b: blue light
114r: red laser
114g: green laser
114b: blue laser
The 116:X prism
116a, 116b, 262,264: light splitting surface
118: the light intensity varying element
120: scanning mirror
202: synthetic light beam
210g: first pointolite
210r: second pointolite
210b: light source thirdly
212g: first coloured light
212r: second coloured light
212b: the 3rd coloured light
220,220a, 220b: lightproof unit
222,222a: shading piece
224,224a: detent
226: speckle is eliminated part
232,234: concentrating element
240: light diffusion part
250: collimating element
260,260a: close the light unit
266: the first beam split parts
268: the second beam split parts
270: light uniformization element
P (1,1)-P (M, N): the position
Embodiment
About aforementioned and other technology contents, characteristics and effect of the present invention, in following cooperation DETAILED DESCRIPTION OF THE PREFERRED with reference to the accompanying drawings, can clearly present.For can clearer expression, below explanation be to be benchmark with the upper and lower, left and right shown in scheming, orientation such as front or rear, and therefore, the direction term of use is that to be used for explanation be not to be used for limiting the present invention.
Light source module of the present invention is applicable in the scan-type projection arrangement (Scanning projection apparatus), the scan-type projection arrangement is defined as according to input signal, light beam is incident upon on each location of pixels on the image frame successively, the image frame that has a plurality of pixels with formation, and image frame is projeced into screen to form the projection arrangement of image.
Light source module comprises a plurality of pointolites and at least one lightproof unit.The every bit light source is suitable for providing a shade, and these coloured light are merged into synthetic light beam, and the every bit light source can be light emitting diode or laser.At least one lightproof unit is suitable for cutting these coloured light bang path of one of them at least with fixing frequency, with shield portions coloured light.Below will be for the embodiment description of drawings light source module of the present invention of arranging in pairs or groups.
Please refer to Fig. 3, the light source module 200 of the embodiment of the invention comprise the first pointolite 210g, the second pointolite 210r, thirdly light source 210b, close light unit 260 and lightproof unit 220.The first pointolite 210g is suitable for providing the first coloured light 212g (as green glow), the second pointolite 210r is suitable for providing the second coloured light 212r (as ruddiness), thirdly light source 210b is suitable for providing the 3rd coloured light 212b (as blue light), and these coloured light 212g, 212r, 212b can be merged into the color difference of synthetic light beam 202, the first coloured light 212g, the second coloured light 212r and the 3rd coloured light 212b.
Closing light unit 260 is suitable for the first coloured light 212g, the second coloured light 212r and the 3rd coloured light 212b are merged into synthetic light beam 202.In more detail, closing light unit 260 for example is the X prism, and it is disposed at the first pointolite 210g, the second pointolite 210r and thirdly between the light source 210b.The light splitting surface 262 that closes light unit 220 is suitable for reflecting the 3rd coloured light 212b, and the first coloured light 212g and the second coloured light 212r are passed through, and the light splitting surface 264 that closes light unit 220 is suitable for reflecting the second coloured light 212r, and the first coloured light 212g and the 3rd coloured light 212b are passed through, so can make the first coloured light 212g, the second coloured light 212r and the 3rd coloured light 212b be merged into synthetic light beam 202.
Please refer to Fig. 4 A and Fig. 4 B, lightproof unit 220 is disposed at by the bang path of the first coloured light 212g, and lightproof unit 220 is suitable for cutting and cutting off with fixing frequency the bang path of the first coloured light 212g, when lightproof unit 220 is cut the bang path of the first coloured light 212g, the lightproof unit 220 shield portions first coloured light 212g.Fixing frequency is meant the light intensity modulation frequency of correspondence image resolution and image update frequency, for example: image analytic degree is 1024 * 768,60 hertz of image update frequencies, then the light intensity modulation frequency is at least 60 * (1024 * 768) hertz, is 47 megahertzes (MHz).Lightproof unit 220 comprises shading piece 222 and the detent 224 that is connected shading piece 222.Detent 224 can be voice coil motor (voice coil motor), piezoelectric material element (piezoelectric material device) but or the detent of other high-frequency drive.Detent 224 can be controlled the fixing frequency of shading piece 222 usefulness direction of arrow 50 indications in Fig. 4 B and move back and forth, with incision or cut off the bang path of the first coloured light 212g.In addition, detent 224 also can be adjusted the stroke of shading piece 222 actions according to the input signal of scan-type display image that projection arrangement is desired, when cutting the bang path of the first coloured light 212g with control shading piece 222 at every turn, and the ratio of blocking the first coloured light 212g.
Consult Fig. 4 A again, can on the bang path of the first pointolite 210g, set up concentrating element 232,234 (as: lens), to assemble the first coloured light 212g.And lightproof unit 220 is to be arranged at by focusing place of the first coloured light 212g, uses the stroke that can shorten shading piece 222 actions.
In addition, if, can set up speckle (speckle) and eliminate part 226 on the bang path of the first coloured light 212g during as the first pointolite 210g with laser, in the present embodiment, speckle is eliminated part 226 and shading piece 222 was provided with for one (as shown in Figure 5), to eliminate the light speckle.Particularly, speckle eliminate part 226 can be refraction optical element (diffraction optical element, DOE) or diffusion disk (diffuser), but not as limit.
For need reach the light intensity modulation frequency in outside modulation mode pointolite (as the first coloured light 212g), the lightproof unit 220 that passing through of utilizing that the present invention proposes has an actuator 224 is with fixing frequency incision or cut off the bang path of the first coloured light 212g, come the shield portions first coloured light 212g, can make the first coloured light 212g reach the light intensity modulation frequency of demand, and the spare part of the lightproof unit 220 of present embodiment is obtained easily, and its cost is low far beyond electro-optic crystal or the acousto-optic crsytal that prior art adopted, so can save the cost of light source module 200.In addition, the energy that lightproof unit 220 is consumed adopts the energy of electric light modulation or the required consumption of acousto-optic modulation low, so save the energy.In addition, lightproof unit 220 is the light intensities that change the first coloured light 212g with incision or the mode that cuts off the bang path of the first coloured light 212g, thus the first coloured light 212g that lightproof unit 220 only can shield portions in the unit interval, so the light utilization ratio is higher.
Please refer to Fig. 6, the lightproof unit 220a of another embodiment of the present invention comprises detent 224a and shading piece 222a, different with above-mentioned lightproof unit 220 is, the detent 224a of lightproof unit 220a has the rotating shaft (not shown), and shading piece 222a is articulated in the rotating shaft.Detent 224a can make shading piece 222a swing back and forth along arrow 60 directions, to cut or to cut off the bang path of the first coloured light 212g.
In the following drawings, the expression components identical identical, the explanation that hereinafter will omit these elements with the label of Fig. 4 A.
Please refer to Fig. 7 A, light source module also comprises light diffusion part 240, and it is arranged on the bang path of the first coloured light 212g, and between the first pointolite 210g and concentrating element 232.Utilize concentrating element 232,234 convergent beams again after making the first coloured light 212g see through 240 diffusions of light diffusion part earlier.
Please refer to Fig. 7 B, if the first coloured light 212g that the first pointolite 210g is provided is non-collimated light, collimating element (collimator) 250 can be set on the bang path of the first coloured light 212g, and it changes collimated light into afterwards so that the first coloured light 212g sees through collimating element 250 between the first pointolite 210g and light diffusion part 240.
Please refer to Fig. 7 C, if when using laser, because the luminous energy of the first coloured light 212g that laser provided is a non-uniform Distribution, as Gaussian distribution (Gaussian distribution), so running that can complicated lightproof unit 220 as the first pointolite 210g.For the comparatively linearization of relation curve between the stroke of the light intensity that makes the first coloured light 212g by lightproof unit 220 and shading piece 222 actions, can on the bang path of the first coloured light 212g, set up light uniformization element 270, and light uniformization element 270 is disposed between the first pointolite 210g and the lightproof unit 220, and light uniformization element 270 is suitable for the light energy distribution of the homogenising first coloured light 212g.And because the comparatively linearization of relation curve between the stroke that the light intensity of the first coloured light 212g by lightproof unit 220 and shading piece 222 move, so be easier to the stroke that driving voltage size by adjusting detent 224 or size of current are controlled shading piece 222 actions, running that so can easier control lightproof unit 220.
In order to reduce the frequency that detent drives shading piece, detent is obtained easily, lightproof unit of the present invention also can comprise a plurality of detents and a plurality of shading piece.Please refer to Fig. 8 A and Fig. 8 B, the lightproof unit 220b of present embodiment comprises a plurality of shading pieces 222 and a plurality of detent 224.Each detent 224 connects a shading piece 222, and these detents 224 are suitable for controlling shading piece 222 and cut and cut off the bang path of the first coloured light 212g successively with fixing frequency, with the shield portions first coloured light 212g.In addition, when detent 224 also can be controlled the bang path of shading piece 222 each incision first coloured light 212g, the ratio of blocking the first coloured light 212g.
In more detail, when scan-type projection arrangement desire shows first pixel, then one of them detent 224 can drive the bang path of the shading piece 222 incisions first coloured light 212g that it connected, be adjusted to requiredly with light intensity, drive the bang path that shading piece 222 that it connected cuts off the first coloured light 212g afterwards again the first coloured light 212g.When scan-type projection arrangement desire shows second pixel, another detent 224 can drive the bang path of the shading piece 222 incisions first coloured light 212g that it connected, be adjusted to requiredly with light intensity, drive the bang path that shading piece 222 that it connected cuts off the first coloured light 212g afterwards again the first coloured light 212g.Thus, the light modulation frequency can be shared jointly by a plurality of detents 224, and the frequency that each detent 224 drives shading piece 222 can significantly reduce, and is therefore more easy for obtaining of detent 224.In addition, in the present embodiment, also can on each shading piece 222, dispose speckle and eliminate part 226 (as shown in Figure 5).
Be noted that the present invention does not limit the light mode of closing of first coloured light, second coloured light and the 3rd coloured light, below will be for the embodiment of another light source module, the difference of the light source module 200 of itself and Fig. 3 only is to close the light mode.Please refer to Fig. 9, the light unit 260a that closes of the light source module 200a of present embodiment comprises the first beam split part 266 and the second beam split part 268.The first beam split part 266 and the second beam split part 268 can be dichroic mirror (dichroic mirror), wherein the first beam split part 266 is disposed on the bang path of the first coloured light 212g and the second coloured light 212r, and the second beam split part 266 is disposed on the bang path of the first coloured light 212g and the 3rd coloured light 212b.In addition, the first beam split part 266 is suitable for making the first coloured light 212g by being passed to the second beam split part 268, and the second coloured light 212r is reflexed to the second beam split part 268.The second beam split part 268 is suitable for making the first coloured light 212g and the second coloured light 212r to pass through, and reflects the 3rd coloured light 212b, so that the first coloured light 212g, the second coloured light 212r and the 3rd coloured light 212b are merged into synthetic light beam 202.
In sum, light source module of the present invention has following advantage at least:
1. compare with the light intensity varying element of prior art, the cost of lightproof unit of the present invention is lower, therefore can reduce the cost of light source module.
2. compare with the light intensity varying element of prior art, the energy that consumes when lightproof unit of the present invention is moved is lower, so light source module of the present invention is saved the energy.
3. part first coloured light that is not blocked by lightproof unit, its energy can be because of not causing extra loss by lightproof unit, so the light utilization ratio is higher.
Though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; those of ordinary skill under any in the technical field; without departing from the spirit and scope of the present invention; can do a little change and modification, so protection scope of the present invention is with being as the criterion that claims were defined.Aforementionedly lightproof unit is applied to first coloured light comes the modulation light intensity to describe the present invention, only be a kind of embodiment, the present invention is not limited to lightproof unit only is applied to first coloured light, mainly be with in the light source module, the pointolite (pointolite can be a plurality of) that needs higher light modulation frequency, the coloured light that is sent is used lightproof unit of the present invention and is got final product.Arbitrary embodiment of the present invention in addition or claim must not reached disclosed whole purposes or advantage or characteristics.In addition, summary part and title only are the usefulness that is used for assisting the patent document retrieval, are not to be used for limiting interest field of the present invention.
Claims (8)
1, a kind of light source module is applicable to that in the scan-type projection arrangement, this light source module comprises:
A plurality of pointolites, the every bit light source is suitable for providing a shade, and those coloured light are merged into synthetic light beam; With
At least one lightproof unit is suitable for fixing frequency incision and cuts off those coloured light bang path of one of them at least, and with this coloured light of shield portions, this fixing frequency is meant the light intensity modulation frequency of correspondence image resolution and image update frequency.
2, light source module as claimed in claim 1 also comprises and close the light unit, and those pointolites comprises:
First pointolite is suitable for providing first coloured light, and wherein this lightproof unit is disposed at by the bang path of this first coloured light, and this lightproof unit is suitable for cutting with fixing frequency the bang path of this first coloured light, with this first coloured light of shield portions;
Second pointolite is suitable for providing second coloured light; And
Thirdly light source is suitable for providing the 3rd coloured light, and wherein this closes the light unit and is suitable for this first coloured light, this second coloured light and the 3rd coloured light are merged into this synthetic light beam.
3, light source module as claimed in claim 2, wherein this lightproof unit comprises:
Shading piece; With
Detent connects this shading piece, and this detent is suitable for controlling this shading piece and cuts the bang path of this first coloured light with fixing frequency, with this first coloured light of shield portions.
4, light source module as claimed in claim 2, wherein this lightproof unit comprises:
A plurality of shading pieces; With
A plurality of detents, connect respectively those shading pieces one of them, and those detents are suitable for controlling those shading pieces and cut the bang path of this first coloured light successively with fixing frequency, with this first coloured light of shield portions.
5, light source module as claimed in claim 2, wherein this to close the light unit be the X prism.
6, light source module as claimed in claim 2, wherein this closes the light unit and comprises:
The first beam split part is disposed on the bang path of this first coloured light and this second coloured light; With
The second beam split part, be disposed on the bang path of the 3rd coloured light, wherein this first beam split part is suitable for making this first coloured light by being passed to this second beam splitter, and this second coloured light reflexed to this second beam splitter, and this second beam splitter is suitable for making this first coloured light and this second coloured light to pass through, and reflect the 3rd coloured light, so that this first coloured light, this second coloured light and the 3rd coloured light are merged into this synthetic light beam.
7, light source module as claimed in claim 2, wherein this first coloured light is for providing the laser of green glow.
8, light source module as claimed in claim 1, wherein those pointolites comprise light emitting diode or laser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100967819A CN100565333C (en) | 2007-04-12 | 2007-04-12 | Light source module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100967819A CN100565333C (en) | 2007-04-12 | 2007-04-12 | Light source module |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101285998A true CN101285998A (en) | 2008-10-15 |
| CN100565333C CN100565333C (en) | 2009-12-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100967819A Active CN100565333C (en) | 2007-04-12 | 2007-04-12 | Light source module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100565333C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106510635A (en) * | 2016-11-30 | 2017-03-22 | 江西科技师范大学 | Skin vessel photoacoustic imaging device |
-
2007
- 2007-04-12 CN CNB2007100967819A patent/CN100565333C/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106510635A (en) * | 2016-11-30 | 2017-03-22 | 江西科技师范大学 | Skin vessel photoacoustic imaging device |
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| Publication number | Publication date |
|---|---|
| CN100565333C (en) | 2009-12-02 |
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