Projector
A projector and beam technology, which is applied in the field of projectors, can solve the problems of poor color uniformity of the projection screen, and it is difficult to achieve uniform mixing between the illumination beam and the received laser beam, and achieve the effect of good color uniformity.
Active Publication Date: 2022-01-04
QISDA OPTRONICS (SUZHOU) CO LTD +1
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Problems solved by technology
It can be seen from this that it is difficult to achieve uniform mixing of the illuminating beam and the receiving laser beam when they combine light, which makes the projection screen of the traditional laser projector have poor color uniformity
Method used
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no. 1 example
[0057] Compared with the first embodiment, the projector 200 uses part of the first light splitting element 32 to reflect the first primary color beam B1 and allows the first primary color beam B1 to partially pass through, and allows the second primary color beam B2 and the third primary color beam B3 to pass through. Due to the transparent characteristics, by rotating the second light splitting element 34 to adjust its orientation, the solid-state light source relative to the second light splitting element 34 can be omitted, so the number of components in the light combination module 202 can be further reduced, and the internal configuration space of the projector 200 can be saved. , and reduce the equipment cost of the projector 200.
[0058] see image 3 , image 3 It is a schematic diagram of a projector 300 according to a third embodiment of the present invention. The projector 300 may include a collimating lens 52 , a first lighting module 54 , a second lighting modul...
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The invention provides a projector which comprises a collimating lens, multiple light splitting elements, a refraction element and multiple solid-state light sources . The light splitting element and the refraction element have the functions of reflecting part or all of the light beams of the specific wave band and allowing part or all of the light beams of the specific wave band to penetrate. Output light of each solid-state light source is projected to the corresponding light splitting element; and the projector enables light beams with different primary colors to uniformly pass through the first part and the second part of the collimating lens by using the optical characteristics of the light splitting element and the refraction element. The projector further comprises a polarizing beam splitter, a reflector plate and a phase delay unit. According to the projector, the polarization state conversion function of the phase delay unit and the specific polarization state reflection and other polarization state penetration permitting functions of the polarization beam splitter are combined with the plurality of light combination modules to provide uniform light rays.
Description
technical field [0001] The invention relates to a projector, in particular to a projector which can effectively improve the uniformity of light emission. Background technique [0002] Laser projectors typically use a blue laser source to provide the illumination beam. The illuminating light beam needs to be converted into other colored laser beams through a wavelength conversion device (such as a color wheel partially coated with phosphor powder / quantum dots), and then combined with the illuminating light beam for use. The traditional light combination module uses the beam splitter to reflect the illumination beam to the color wheel through a part of the collimating lens. light unit. In addition, part of the illuminating beam passes through the part of the color wheel without wavelength conversion material, and is projected to the light receiving unit through another part of the collimating lens, and combined with the received laser beam. It can be seen from this that it ...
Claims
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IPC IPC(8): G03B21/20
CPCG03B21/2073G03B21/2066G03B21/206G03B21/208G03B21/2053G03B21/2013G03B33/06G03B33/12
Inventor 简志雄林明坤吴宗训
Owner QISDA OPTRONICS (SUZHOU) CO LTD