Dynamic control of laser source current in projection display

Dabo Guo; Guang Yuan; Zhen Wang; Junling Wu

doi:10.1117/1.OE.58.5.053108

31 May 2019 Dynamic control of laser source current in projection display

Dabo Guo, Guang Yuan, Zhen Wang, Junling Wu

Author Affiliations +

Optical Engineering, Vol. 58, Issue 5, 053108 (May 2019). https://doi.org/10.1117/1.OE.58.5.053108

Abstract

Display technology is the main source for humans to obtain information and entertainment. Increased display screen size is a trend, whether on mobile phone or television, and projection display has become increasingly popular in achieving large screen displays. Previous projection display systems have used a traditional light bulb which cannot be modulated, so the power of the display device is constant and the contrast of the display device can only be improved by controlling the size of the aperture in the light path. With the appearance of solid-state light sources, i.e., lasers, the luminance of the light source can be modulated according to the image content so that the power of the light source can be reduced and the dynamic contrast can be improved simultaneously. A method to modulate the power of the laser light source on a frame-to-frame basis in response to the input image data is shown. An ultrahigh contrast is achieved with the laser display. A dynamic contrast of greater than 100,000:1 can be achieved, and the average power consumption of the laser TV can be reduced by about 20% with typical video source material.

Citation Download Citation

Dabo Guo, Guang Yuan, Zhen Wang, and Junling Wu "Dynamic control of laser source current in projection display," Optical Engineering 58(5), 053108 (31 May 2019). https://doi.org/10.1117/1.OE.58.5.053108

Received: 26 February 2019; Accepted: 10 May 2019; Published: 31 May 2019

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