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Image projection apparatus for adjusting white balance and method thereof

一种图像投影、图像的技术，应用在车削设备、图像通信、金属加工设备等方向，能够解决光量图像恶化等问题

Inactive Publication Date: 2006-09-13
SAMSUNG ELECTRONICS CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0006] An unacceptable drop in the amount of light leading to image degradation of the image presented to the user, while also requiring white balance adjustments

Method used

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  • Image projection apparatus for adjusting white balance and method thereof
  • Image projection apparatus for adjusting white balance and method thereof
  • Image projection apparatus for adjusting white balance and method thereof

Examples

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Embodiment Construction

[0024] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0025] figure 1 is a block diagram showing an image projecting device according to an exemplary embodiment of the present invention. The image projecting apparatus according to an exemplary embodiment of the present invention uses three-color light emitting diodes (LEDs), namely red (R)-LEDs, green (G)-LEDs, and blue (B)-LEDs, as light sources. The image projecting apparatus according to an exemplary embodiment of the present invention considers the level of light emitted from the LEDs when adjusting the white balance of a projected image. exist figure 1 In , the solid line indicates the passage of electrical signals such as driving signals and control signals, and the dashed line indicates the passage of light beams.

[0026] control figure 1 , the image projection device includes: a light source unit 110, a drive unit 120, a c...

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Abstract

An image projection apparatus which adjusts a white balance in consideration of levels of light emitted from light-emitting diodes and a white balance adjustment method thereof. The image projection apparatus comprises a light source unit for sequentially emitting lights generated by a red (R)-light emitting element, a green (G)-light emitting element, and a blue (B)-light emitting element. An image generation unit generates an image using the lights sequentially emitted from the light source unit and projecting the image. A driving unit drives the light source unit and the image generation unit. A light sensor measures levels of lights generated by the R-light emitting element, the G-light emitting element, and the B-light emitting element. A controller controls a driving operation of the driving unit based on the levels of lights measured by the light sensor to adjust a white balance of the image projected from the image generation unit.

Description

technical field [0001] The invention relates to an image projection device and a white balance adjustment method thereof. More specifically, the present invention relates to an image projection device using a light emitting diode as a light source and a white balance adjustment method thereof. Background technique [0002] An image projecting device receives an image signal, forms an image corresponding to the image signal, and projects the image onto a screen. Such an image projection device is called a "projector". An image projection device generally employs the following image forming process. White light from a white lamp travels through the color wheel. The color wheel sequentially filters white light into red (R), green (G) and blue (B) light. R light, G light and B light are modulated into corresponding images by a digital micromirror device (DMD). [0003] However, the disadvantages of white lamps are large size and high power consumpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/31G09G3/32
CPCG03B21/00H04N9/3197H04N9/3111H04N9/3155G03B21/008H04N9/3182
Inventor 洪承彻
Owner SAMSUNG ELECTRONICS CO LTD
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