CN1983020A - Projector with multiple light sources - Google Patents
Projector with multiple light sources Download PDFInfo
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- CN1983020A CN1983020A CN200510131401.1A CN200510131401A CN1983020A CN 1983020 A CN1983020 A CN 1983020A CN 200510131401 A CN200510131401 A CN 200510131401A CN 1983020 A CN1983020 A CN 1983020A
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- light
- projector
- refracting element
- light beam
- light source
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Abstract
A projector with multiple light source consists of a shell, the first light source set in shell and used to generate light beam, the second light source set in shell and used to generate light beam, the first refraction element for deviating light beam generated by the first light source, the second refraction element for refracting light beam generated by the second light source to be at direction of light beam refracted by the first refraction element, a light tube for homogenizing light from two said refraction elements and an imaging unit for forming homogenized light to be an image.
Description
Technical field
The present invention relates to a kind of projector, especially relate to a kind of projector with a plurality of light sources with the reinforcement projection brightness.
Background technology
Along with the continuous progress of optics science and technology, projector has been widely used in various occasions.Generally when design projector, light luminance is important considering normally.Put it briefly, light is strong more, and the brightness of projection is high more, and the effect of projection is also good more.
Consult Fig. 1, Fig. 1 is the synoptic diagram of a known projector 10.Projector 10 includes a light supply apparatus 12, a colour wheel 14, a light pipe 16, and an imaging device 18.Light supply apparatus 12 is used for producing a light beam 22 and light beam 22 is projected to colour wheel 14, light beam 22 is projected in the light pipe 16 after colour wheel 14 filters, and colour wheel 14 is arranged between light supply apparatus 12 and the light pipe 16, it is the center rotation with a rotating shaft 15, be used for making red in the light beam 22, green, primary colors light alternately passes through, it is red that light beam 22 is presented successively, green, blue three-color 24, and then make imaging device 18 carry out color conditioning at three kinds of different monochromatic light, and light pipe 16 will be exported the uniform light beam 26 of one brightness to imaging device 18 earlier again after monochromatic light 24 homogenising.Imaging device 18 is handled the light beam 26 that light pipes 16 are exported, with an image frame modulation to light beam 26 and form an image beam 28, thereby and then image beam 28 be projected on the screen 20 form an image.In addition, light supply apparatus 12 is made of a single bulb 30 and a lampshade 32, and wherein bulb 30 is used for producing light, and lampshade 32 then pools light beam 22 with the light that bulb 30 is produced, to provide projector 10 required light.
Yet, because required light when only having single bulb 30 to provide projector 10 running in the projector 10 as luminophor, so as the desire brightness that improves the image of 10 projections of projector, be bound to must manage to increase the luminous power of bulb 30.But, this kind is unsatisfactory by the practice that the raising light source power increases projected image brightness, for example when the power of bulb improves, the waste heat that it produced also will relatively increase, and the temperature in its when running is improved, and when temperature surpassed a certain predetermined value, bulb promptly probably can burn.
Summary of the invention
The invention provides a kind of projector, to solve the above problems with a plurality of light sources with the reinforcement projection brightness.
The present invention discloses a kind of projector with a plurality of light sources, and it includes a housing; One first light source is installed in the housing, is used for producing light beam; One secondary light source is installed in the housing, is used for producing light beam; One first refracting element is used for being partial to the light beam that first light source is produced; One second refracting element, the refraction of optical beam that is used for secondary light source is produced is to the direction that is roughly parallel to the light beam after first refracting element reflects; One light pipe is used for the equalizing light rays from first refracting element and second refracting element, and an imaging device, is used for handling light after the light pipe institute homogenising so that form an image.
Description of drawings
Fig. 1 is the synoptic diagram of known projector;
Fig. 2 is the synoptic diagram of first embodiment of the invention projector;
Fig. 3 is the synoptic diagram of second embodiment of the invention projector.
Embodiment
Consult Fig. 2, Fig. 2 is the synoptic diagram of first embodiment of the invention one projector 50.Projector 50 comprises a housing 52, and one first light source 54, is installed in the housing 52, and first light source 54 comprises a luminophor 56a, is used for producing light, and a light collecting element 58a, is used for the light of concentrating luminophor 56a to be produced, to form a light beam 60a.Light collecting element 58a includes a paraboloidal mirror 62a, and luminophor 56a is installed in the position of the focus of paraboloidal mirror 62a, a positive lens 64a and a negative lens 66a.Projector 50 also comprises a secondary light source 68, installs in the housing 52 and with respect to a side of first light source 54, secondary light source 68 comprises a luminophor 56b, be used for producing light, and a light collecting element 58b, be used for the light of concentrating luminophor 56b to be produced, to form a light beam 60b.Light collecting element 58b includes a paraboloidal mirror 62b, and luminophor 56b is installed in the position of the focus of paraboloidal mirror 62b, a positive lens 64b and a negative lens 66b.Wherein luminophor 56a, 56b can be bulbs, and positive lens 64a, 64b can be a plano-convex lens or a biconvex lens, and negative lens 66a, 66b can be a plano-concave lens or a biconcave lens.Projector 50 also comprises one first refracting element 70 and one second refracting element 72, and it can be a prism, is used for being partial to light beam 60a, 60b, to form a compression light beam 71a, 71b.Wherein first refracting element 70 does not link to each other mutually with second refracting element 72.
Continue to consult Fig. 2, projector 50 also comprises a focus lens group 74, be used for focusing on compression light beam 71a, 71b from first refracting element 70, second refracting element 72, one colour wheel 76, be used for making the Red Green Blue light in the light beam 78 alternately to pass through, make light beam 78 present three kinds of colors of red, green, blue successively, simultaneously focus lens group 74 is used for light beam 78 is focused on the inlet of a light pipe 80, is used for exporting after light beam 78 homogenising one brightness light beam 82 uniformly again.Projector 50 also comprises an imaging device 84, in order to handling the light beam 82 that light pipe 80 is exported, with an image frame modulation to light beam 82 and form an image beam 86, be projected to again and form an image on the screen 90.
This again to projector 50 in the light that produces of first light source 54 and secondary light source 68 to the end light beam projecting to screen 90 and the light path that forms image is done a detailed description.At first because the luminophor 56a of first light source 54 and secondary light source 68,56b is installed in paraboloidal mirror 62a respectively, the position of the focus of 62b, so luminophor 56a, the ray cast that 56b sent is to paraboloidal mirror 62a, just be reflected into two parallel beam 92a behind the 62b, 92b, and this two parallel beam 92a, 92b is via positive lens 64a, the effect that has light to converge after the 64b refraction, afterwards again via negative lens 66a, the refraction of 66b becomes almost parallel light beam 60a with the refraction of optical beam, 60b, that is to say positive lens 64a, 64b and negative lens 66a, the combination of 66b can reach the effect of compression light beam, thereby can make light beam more enter first refracting element 70 in the concentrated area, second refracting element 72.First refracting element 70 and second refracting element 72 that presents with the prism kenel can be partial to light beam 60a then, 60b and form compression light beam 71a respectively, 71b, then focus lens group 74 just will be from the compression light beam 71a of first refracting element 70 and second refracting element 72,71b focuses on, rotary color optical filter on the colour wheel 76, be used for making red in the light beam 78, green, primary colors light alternately passes through, it is red that light beam 78 is presented successively, green, blue three-color, focus lens group 74 focuses on light beam 78 inlet of light pipe 80 simultaneously, light pipe 80 can will be exported one brightness light beam 82 uniformly again after light beam 78 homogenising, last imaging device 84 is handled the light beam 82 that light pipe 80 is exported, so that the image frame modulation is formed image beam 86 to the light beam 82, thereby and then image beam 86 is projected to forms image on the screen 90.
Because first refracting element 70 of the present invention, second refracting element 72 can change the light path of first light source 54 and secondary light source 68 generation light, to converge the light of concentrating first light source 54 and secondary light source 68 to be transmitted, so can carry out again synthetic to light beam, so that the light that light source produces can more concentratedly be output in the camera lens of projector 50, thereby the light service efficiency of increase light source, and promote the light uniformity coefficient simultaneously.In addition, because first refracting element 70, second refracting element 72 reflect the light beam that is transmitted by first light source 54 and secondary light source 68 respectively, be concentrated into the light beam that is incident to focus lens group 74 to converge, so can strengthen according to the distance of design requirement with first light source 54 and secondary light source 68, so just, can strengthen the distance of two luminophor 56a, 56b, and then avoid the concentrated problem of generating heat.
Consult Fig. 3, Fig. 3 is the synoptic diagram of second embodiment of the invention one projector 100, with projector's 50 differences of first embodiment be the configuration of light collecting element, therefore have identical function and structure with the element of the first embodiment same numeral in a second embodiment, just no longer describe in detail at this.Projector 100 comprises one first light source, 104, the first light sources 104 and comprises luminophor 56a, is used for producing light, and a light collecting element 108a, is used for the light of concentrating luminophor 56a to be produced, to form a light beam 110a.Light collecting element 108a includes an off-axis paraboloids and ellipsoids mirrors 112a, and luminophor 56a is installed in the wherein position of a focus of off-axis paraboloids and ellipsoids mirrors 112a, and a negative lens 116a.Projector 100 also comprises a secondary light source 118, is installed in the side with respect to first light source 104, and secondary light source 118 comprises a luminophor 56b, be used for producing light, and a light collecting element 108b, be used for the light of concentrating luminophor 56b to be produced, to form a light beam 110b.Light collecting element 108b includes an off-axis paraboloids and ellipsoids mirrors 112b, and luminophor 56b is installed on the wherein position of a focus of off-axis paraboloids and ellipsoids mirrors 112b, and a negative lens 116b.Wherein luminophor 56a, 56b can be bulbs, and negative lens 116a, 116b can be a plano-concave lens or a biconcave lens.First refracting element 70 and second refracting element 72 of projector 100 can be used to be partial to light beam 110a, 110b, to form compression light beam 121a, 121b.The focus lens group 74 of projector 100 can be used to focus on compression light beam 121a, 121b.Rotary color optical filter on the colour wheel 76, be used for making the Red Green Blue light in the light beam 128 alternately to pass through, make light beam 128 present three kinds of colors of red, green, blue successively, focus lens group 74 focuses on light beam 128 inlet of light pipe 80 simultaneously, light pipe 80 can will be exported one brightness light beam 132 uniformly again after light beam 128 homogenising, last imaging device 84 will be handled the light beam 132 that light pipe 80 is exported, with with an image frame modulation to light beam 132 and form an image beam 136, and then image beam 136 be projected on the screen 90 and form an image.
The luminophor 56a of first light source 104 and secondary light source 118,56b is installed in off-axis paraboloids and ellipsoids mirrors 112a respectively, the wherein position of a focus in the bifocal of 112b, so luminophor 56a, the ray cast that 56b sent is to off-axis paraboloids and ellipsoids mirrors 112a, to form two converging beam 142a behind the 112b, 142b, and this two converging beam 142a, 142b is via negative lens 116a, 116b refraction back forms two almost parallel light beam 110a, 110b, that is to say off-axis paraboloids and ellipsoids mirrors 112a, 112b and negative lens 116a, the combination of 116b can reach the effect that forms compression and parallel beam, and can make light beam more enter first refracting element 70 in the concentrated area, second refracting element 72.First refracting element 70 and second refracting element 72 that presents with the prism kenel can be partial to light beam 110a then, 110b, and form compression light beam 121a respectively, 121b, then focus lens group 74 just will be from the compression light beam 121a of first refracting element 70 and second refracting element 72,121b focuses on, rotary color optical filter on the colour wheel 76, be used for making red in the light beam 128, green, primary colors light alternately passes through, it is red that light beam 128 is presented successively, green, blue three-color, focus lens group 74 focuses on light beam 128 inlet of light pipe 80 simultaneously, light pipe 80 can will be exported one brightness light beam 132 uniformly again after light beam 128 homogenising, last imaging device 84 is handled the light beam 132 that light pipe 80 is exported, so that the image frame modulation is formed image beam 136 to the light beam 132, and then image beam 136 is projected on the screen 90 and forms image.
Compare with the projector of the single luminophor of known only tool, projector of the present invention has a plurality of light sources, so can increase projected image brightness effectively, refracting element of the present invention in addition can pool the light beam that a plurality of light source produced one converging beam, therefore can carry out again synthetic to light beam, so that the light that a plurality of light sources produce can more concentratedly be output in the camera lens of projector, thereby increase the light service efficiency of light source, and promote the light uniformity coefficient simultaneously, so that the brightness meeting of projected image is than the brightness height of institute of known projector projects images; In addition, therefore the distance between a plurality of light sources also can strengthen, and then avoids crossing the nearly concentrated problem of generating heat that causes because of light source.
The above only is the preferred embodiments of the present invention, and all equivalent variations and modifications of making according to claim of the present invention all should belong to the scope that the present invention protects.
Claims (10)
1. projector with a plurality of light sources, it includes:
One housing;
One first light source is installed in the described housing, is used for producing light beam;
One secondary light source is installed in the described housing, is used for producing light beam;
One first refracting element is installed in the described housing, is used for being partial to the light beam that described first light source is produced;
One second refracting element is installed in the described housing, and the refraction of optical beam that is used for described secondary light source is produced is to the direction that is roughly parallel to the light beam after first refracting element reflects;
One light pipe is installed in the described housing, is used for the equalizing light rays from described first refracting element and described second refracting element; And
One imaging device is installed in the described housing, is used for handling light after the described light pipe institute homogenising to form an image.
2. projector as claimed in claim 1, wherein said first light source and secondary light source include a luminophor respectively, are used for producing light, and a light collecting element, are used for the light of concentrating luminophor to be produced, to form light beam.
3. projector as claimed in claim 2, wherein said light collecting element includes:
One paraboloidal mirror, luminophor are installed in the position of the focus of paraboloidal mirror;
One positive lens is installed between the luminophor and first refracting element or second refracting element; And
One negative lens is installed between the positive lens and first refracting element or second refracting element.
4. projector as claimed in claim 2, wherein said light collecting element includes:
One off-axis paraboloids and ellipsoids mirrors, luminophor are installed in the wherein position of a focus of off-axis paraboloids and ellipsoids mirrors; And
One negative lens is installed between the luminophor and first refracting element or second refracting element.
5. projector as claimed in claim 4, wherein said negative lens is a plano-concave lens.
6. projector as claimed in claim 4, wherein said negative lens is a biconcave lens.
7. projector as claimed in claim 1, it also comprises a focus lens group, is used for focusing on the light beam from first refracting element and second refracting element.
8. projector as claimed in claim 7, it also comprises a colour wheel, is installed between focus lens group and the light pipe, is used for making the primaries in the light beam that focus lens group focuses on alternately to pass through, in turn to produce the light beam of different colours.
9. projector as claimed in claim 1, wherein said first refracting element and second refracting element are respectively a prism.
10. projector as claimed in claim 1, wherein said first refracting element does not link to each other with second refracting element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510131401.1A CN1983020A (en) | 2005-12-12 | 2005-12-12 | Projector with multiple light sources |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510131401.1A CN1983020A (en) | 2005-12-12 | 2005-12-12 | Projector with multiple light sources |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1983020A true CN1983020A (en) | 2007-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510131401.1A Pending CN1983020A (en) | 2005-12-12 | 2005-12-12 | Projector with multiple light sources |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1983020A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768458A (en) * | 2012-07-12 | 2012-11-07 | 芜湖雅图数字视频技术有限公司 | Double-lamp illumination system and projector |
-
2005
- 2005-12-12 CN CN200510131401.1A patent/CN1983020A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102768458A (en) * | 2012-07-12 | 2012-11-07 | 芜湖雅图数字视频技术有限公司 | Double-lamp illumination system and projector |
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