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Projection machine contrast reinforcing system and reinforcing method thereof

A technology for enhancing systems and projectors, applied in the field of projectors, can solve problems such as difficulty in meeting, and achieve the effects of reducing gain, increasing gain, and reducing brightness

Inactive Publication Date: 2012-09-19
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above two technologies can only increase the contrast by about 15% when used alone without changing the hardware structure, which is still difficult to meet the needs of some users

Method used

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  • Projection machine contrast reinforcing system and reinforcing method thereof
  • Projection machine contrast reinforcing system and reinforcing method thereof
  • Projection machine contrast reinforcing system and reinforcing method thereof

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Embodiment Construction

[0021] see figure 1 , the embodiment of the present invention provides a projector contrast enhancement system 100, which is used in a projector 10 with two working modes: standard mode and economical mode. The contrast ratio refers to the ratio of the brightness when the projector 10 projects an all-white picture to the brightness when it projects an all-black picture. The standard mode is a mode in which the projector 10 uses rated power to work, and the economic mode is the projection mode. The energy-saving mode of the machine 10, the concepts of the standard mode and the eco-mode will be described in more detail below.

[0022] The projector 10 also includes imaging equipment such as a light source, a color separation device, a shutter structure, and a lens. After the light emitted by the light source passes through the color separation device, the shutter structure controls the amount of light entering the lens. The light emitted by the light source is mainly white ligh...

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Abstract

The invention discloses a projection machine contrast reinforcing system, which is used for a projector provided with an optical source, a color separator and an optical shutter structure. A contrast is a specific value between the brightness of the projection all-white menu of the projector to the brightness of the projection all-black menu of the projector. Light emitted by the optical source is mainly white and the volume of the light entering a lens is controlled by an optical shutter structure after the light passes through the color separator. The projection machine contrast reinforcingsystem comprises a sensing module, a control module and an adjusting module, wherein the sensing module is used for sensing gray scales of a projection menu; the control module is used for controlling the projection to reduce the output power of the optical source when the grey scale of the projection menu is larger than a set value; and the adjusting module is used for improving the plus of non-white optical bands in the optical source after the output power of the optical source is reduced, and moreover, the adjusting module controls the light emitted by the optical source from the color separator to be non-white color and simultaneously reduces the volume of light entering the lens of the projector. The projection machine contrast reinforcing system can greatly improve the contrast of the projection menu. The invention also provides a contrast enhancement method.

Description

technical field [0001] The invention relates to a projector, in particular to a projector contrast enhancement system and an enhancement method thereof. Background technique [0002] With the advancement of technology, users have higher and higher requirements for the contrast ratio of the projection screen of the projector. [0003] In response to the need to improve contrast, Texas Instruments (TI) launched the Dynamic black technology in 2006. The principle of this technology is roughly as follows: for a darker projection screen, by controlling the shutter structure set in front of the light source , to reduce the amount of light entering the optical system; for a brighter projected image, maximize the amount of light entering the optical system, thereby increasing the final contrast of the projected image. In addition, Osram (Osram) and Philips also launched UNISHAPE (Universal Shaped Light Waveform) bulb lighting technology and Vivid image processing technology respect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14H05B37/02
Inventor 王邦丞
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD