Color light selection device
A technology for selecting devices and color light, applied in projection devices, optics, optical components, etc., can solve problems such as mechanical wear, color light interruption, vibration noise, etc.
Inactive Publication Date: 2009-08-26
DELTA ELECTRONICS INC
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[0008] An object of the present invention is to provide a color light selection device for a projection device, which is suitable for non-polarized light optical systems, can provide a fast color light selection function, and is used to solve the color light interruption of the known mechanical color wheel mechanism , mechanical wear, vibration noise and other shortcomings
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[0013] see figure 2 , which shows a schematic diagram of an embodiment of a projection device 2 applying the color light selection device of the present invention. The projection device 2 is in a non-polarized projection device, especially a DLP projection device. The projection device 2 comprises a light source 21, a light collecting column 22, a lens group 23, a color light selection device 24, an internal total reflection prism group 25, a digital micromirror device 26 and a lens group 27, and the light source 21 provides a non-polar Input white light (White) L IN . It should be noted that, figure 2 Except for the color light selection device 24 disclosed in the present invention, other components of the projection device 2 shown are the same as the known technology, so the optical configuration of the projection device 2 is only used to illustrate the present invention, not to limit the present invention.
[0014] Please refer to image 3 , which shows a schematic d...
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The invention discloses a liquid crystal color light selection device, which is applied to nonpolarized projection devices. The color light selection device comprises a polarization light splitting component and two switchable phase delay groups which are arranged at two outlet ends of the polarization light splitting component respectively, wherein each switchable phase delay group respectively comprises at least one liquid crystal layer and at least one color separation coating layer. When white light with S and P polarization directions irradiates at an incident end of the polarization light splitting component, the white light is modulated into polarized color light with two orthogonalities, and the polarized color light emits from the two outlet ends; and under the action of the switchable phase delay groups of the two outlet ends, the selected polarized color light is combined into nonpolarized color light by the polarization light splitting component once more, and the nonpolarized color light is outputted by a fourth outlet end.
Description
technical field [0001] The invention relates to a color light selection device, in particular to a non-polarized color light selection device used in a display device. Background technique [0002] In current digital light processing (DLP) projection devices, a color wheel is usually used to sequentially distinguish different colors of light onto a designated optical path. This kind of color wheel mechanism is mainly composed of red, green, blue and other color separation filters to form a disc structure, which is driven by a high-speed motor to rotate at a high speed, thereby achieving the purpose of quickly distinguishing color light. The purpose of increasing the speed of the color wheel is not only to meet the fast spectral modulation, but also to reduce the "spoke time" to suppress the phenomenon of color breaking. It should be noted that the aforementioned so-called spoke time refers to the time required for switching from one color segment to another on the color whe...
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IPC IPC(8): G02B27/28G03B21/14G02B5/30G02F1/01
Inventor 黄俊杰
Owner DELTA ELECTRONICS INC