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Optical rotating device, lighting system and projection device

A rotating device and lighting system technology, which is applied in optics, projection devices, photography, etc., can solve problems such as uneven color of the picture, uneven brightness of the display picture, and scattered and uneven laser polarization direction and intensity, so as to achieve color or brightness. dark uniform effect

Active Publication Date: 2021-10-29
CORETRONIC
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Problems solved by technology

[0004] However, in the known lighting system architecture, the polarization polarity of the laser beam after entering the projection device will be destroyed by the optical elements inside the projection device, so that the polarization direction and intensity of the laser light become scattered and inconsistent, which in turn causes the display screen to be uneven. The problem of uneven brightness
Therefore, if the projection device produces a three-dimensional image display screen in the polarized stereo mode (lens plus polarizer), the image screen projected from the lens and polarizer will have uneven color or uneven brightness and darkness.

Method used

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  • Optical rotating device, lighting system and projection device
  • Optical rotating device, lighting system and projection device
  • Optical rotating device, lighting system and projection device

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Embodiment Construction

[0022] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of preferred embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referring to the directions of the drawings. Accordingly, the directional terms are used to illustrate and not to limit the invention.

[0023] figure 1 is a schematic diagram of a projection device according to the first embodiment of the present invention. figure 2 for figure 1 Schematic diagram of the structure of the optical rotation device in . Please refer to figure 1 , the projection device 200 of this embodiment is used to provide a projection beam PB. The projection device 200 includes an illumination system 100 , at least one light valve 210 and a projection lens 220 . The illumination system 100 is used to...

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Abstract

An optical rotating device includes a substrate, a rotating shaft, a driving element, a wavelength conversion layer and a polarizing element. The substrate has opposing first and second surfaces. The rotating shaft is connected to the base plate. The driving element is connected to the rotating shaft and used to drive the rotating shaft to rotate. The wavelength conversion layer is configured on the first surface of the substrate to convert the first laser beam into a converted beam. The polarizing element is arranged on the second surface of the substrate, wherein the first laser beam and at least one second laser beam are respectively transmitted to the wavelength conversion layer and the polarizing element from opposite directions, and the driving element is used to drive the substrate, the wavelength conversion layer, and the polarizing element to The rotation axis is the rotation center axis, and when the polarizing element rotates, the polarizing element is used to make at least one second laser beam output from the polarizing element have different polarization states at different times. An illumination system and a projection device are also presented. The projection device of the present invention can provide a display screen with uniform color or light and dark.

Description

technical field [0001] The invention relates to an optical rotating device, an illumination system and a projection device. Background technique [0002] A projection device is a display device used to generate a large-scale picture, and has been continuously improving with the evolution and innovation of technology. The imaging principle of the projection device is to convert the illumination beam generated by the lighting system into an image beam through a light valve, and then project the image beam to a projection target (such as a screen or a wall) through a projection lens to form a projection image. [0003] In addition to using laser light sources to excite phosphors to emit light, laser projection devices can also directly use lasers as projector lighting sources, and have the advantage of adjusting the number of light sources according to brightness requirements, so as to meet the needs of various projectors with different brightness. [0004] However, in the kno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/20
CPCG03B21/2013G03B21/204G03B21/206G03B21/2073G03B33/08H04N9/3111H04N9/3158H04N9/3161H04N9/3164G03B21/2066G03B21/208H04N9/3167
Inventor 潘浩炜谢启堂
Owner CORETRONIC
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