Color wheel parameter detecting system and method
A technology of parameter detection and color wheel, applied in the direction of color/spectral characteristic measurement, measuring device, testing optical performance, etc., can solve the problems that affect the color processing of projectors, image color confusion, etc.
Inactive Publication Date: 2010-06-23
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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Problems solved by technology
If the parameters of the color wheel 10 do not meet the requirements, such as the angles of the middle red filter 102, the green filter 104 and the blue filter 106 of the three-color filter 100 and the relative position of the time label 400 and the three-color filter 100 There is a large deviation of the position relative to the standard value, which will directly affect the color processing of the projector, resulting in color confusion in the image
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[0029] see image 3 , which is a structural diagram of a color wheel parameter detection system 15 in a preferred embodiment, which is used to detect the angles of various color filters in the color wheel and the relative positions of the time stamp and the filters. Since there are many types of color wheels, such as: three-color color wheel RGB; four-color color wheel RGB+W, where W represents white; six-color color wheel RGBRGB, etc., the color packages such as RGB above all represent color filters with a fan-shaped structure, and some Only the outer part of the fan-shaped filter is colored, and the plurality of fan-shaped color filters together form a disc. The detection of the three-color color wheel 10 is taken as an example below for illustration.
[0030] The color wheel 10 includes a three-color filter 100 , a fixing part 200 , a motor 300 and a time label 400 pasted on a side wall of the fixing part 200 . The three-color filter 100 includes a red filter 102 , a green...
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The present invention relates to a color-wheel parameter detecting system; a color wheel comprises a multi-color light filter, a motor, a fixed part and a time label that is stuck on the side wall of the fixed part; the multi-color light filter comprises a plurality of sector light filters with different colors, and the multi-color light filter is fixed on the fixed part; the motor drives the fixed part to rotate so as to drive the multi-color light filter to rotate; the color-wheel parameter detecting system comprises a first sensor, a second sensor and a processor, wherein, the first sensoris used for transmitting the light beam to the multi-color light filter and receiving the reflected light beam; boundary pulse is generated according to the variation of the strength of the reflectedlight beam; the second sensor is used for transmitting the light beam to the side wall of the fixed part and receiving the reflected-back light beam, and a time pulse is generated according to the variation of the strength of the reflected light beam; according to the relationship between the time pulse and the boundary pulses, the processor calculates the angle value of the boundary between the time label and different color light filters. The present invention also provides a method for detecting the parameter of the color wheel.
Description
technical field [0001] The invention relates to a parameter detection system and method, in particular to a detection system and method for color wheel parameters in a projector. Background technique [0002] At present, projectors are mainly divided into LCD type and DLP type (Digital Light Processing), among which DLP projector adopts DMD (Digital Micromirror Device) microlens reflection technology, and uses color wheel (Color Wheel) to complete the separation of colors and processing. [0003] In the DMD projection system, the white light emitted by the light source is focused on the color wheel through the focusing lens. The color wheel is mainly composed of red, green, blue and other color filters. Color separation is performed and beams of a specific color are projected onto the DMD surface. The surface of the DMD is composed of small mirrors corresponding to the number of pixels. These small mirrors rotate according to the control of the video signal. When the small...
Claims
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IPC IPC(8): G01B11/26G01M11/02
CPCG01N21/25G01B11/26
Inventor 林信力简义本林光伟赖柏元
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD