A MEMS scanning mirror projection system and method
A micro-electromechanical scanning and scanning mirror technology, applied in electrical components, color TV, color TV components, etc., can solve the problem of uneven pixel spacing, and achieve the effect of improving image quality and improving pixel spacing.
Active Publication Date: 2021-03-19
HUAINAN NORMAL UNIV
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[0007] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a micro-electromechanical scanning mirror projection system and method, wherein the scanning mirror can be adjusted according to the tilt angle, the vertical distance from the scanning mirror to the projection screen, etc. The lighting time of each pixel makes the pixel spacing of the final projected picture reach the preset value, thereby improving the uneven pixel spacing and improving the imaging quality of the final projected picture
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Embodiment 1
[0045] Such as Figure 4 As shown, this embodiment provides a micro-electromechanical scanning mirror imaging system, the system includes a light source module 130, a scanning mirror 142, a circuit module 120 and a processing module 110, wherein: the circuit module 120 includes a light source modulation circuit 121 and a scanning drive The circuit 122, the light source modulation circuit 121 is configured to output a light source modulation signal, and the scanning driving circuit 122 is configured to output a scanning driving signal.
[0046] The light source modulation signal includes two aspects, one of which is the modulation of the grayscale of the pixel point n, and the other is the modulation of the lighting duration of the pixel point n. Specifically, this embodiment is the modulation of the lighting duration of the pixel point n. . Such as image 3 As shown, the scanning driving signals include horizontal scanning driving signals and vertical scanning driving signal...
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The invention discloses a micro-electro-mechanical scanning mirror projection system and a method, which belong to the field of imaging, the system comprises a circuit module, a light source module, ascanning mirror and a processing module, the scanning mirror performs angle deflection under the action of a scanning driving signal, and an included angle alpha is formed between the normal when thescanning mirror is static and the fast axis scanning direction of a grating scanning mode; then, the calculation unit calculates a light source modulation signal according to the alpha included angle, the distance d from the scanning mirror to the projection picture, a preset pixel interval L and a preset scanning mirror deflection angle theta (t); a light beam corresponding to each pixel point of the to-be-projected picture output according to the light source modulation signal is projected onto a scanning mirror; according to the method, the lightening duration of each pixel point can be modulated according to the included angle alpha and the distance from the scanning mirror to the projection picture, so that the pixel point interval of the final projection picture reaches a preset value, the condition of uneven pixel point interval is improved, and the imaging quality of the projection picture is guaranteed.
Description
technical field [0001] The invention relates to the field of micro-electromechanical imaging, and more specifically, to a micro-electromechanical scanning mirror projection system and method. Background technique [0002] Miniature portable projection devices, such as projection mobile phones, projection watches, etc., have always been the imaging products that people look forward to. At present, the micro-electromechanical scanning mirror imaging system has gradually become one of the technologies most likely to realize miniature portable projection equipment due to its smaller size and better imaging effect. [0003] With the current MEMS scanning mirror driving method and the light source modulation method of the MEMS scanning mirror imaging system, when the MEMS scanning mirror imaging system is required to project images obliquely, such as projection keyboards, etc., it is easy to have uneven pixel spacing, which affects The imaging quality of the final projected image...
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IPC IPC(8): H04N9/31
CPCH04N9/3129H04N9/3138H04N9/3141
Inventor 葛先雷许静雯高强权循忠陈帅束仁义
Owner HUAINAN NORMAL UNIV