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Light source driving method and device for image projection

A light source driving and projection technology, applied in the direction of light source, electric light source, projection device, etc., can solve the problem of color shift of the picture, avoid too bright or too dark, and improve the effect of color shift

Inactive Publication Date: 2017-02-22
LITE ON ELECTRONICS (GUANGZHOU) LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, for the existing projection device, if the light-emitting element (for example: laser diode) used by it will be affected by temperature, the same driving current provided for the same image information will have an effect due to the influence of temperature. Light beams with different characteristics (for example: brightness), which lead to the problem of color shift in the picture projected by the projection device

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  • Light source driving method and device for image projection
  • Light source driving method and device for image projection
  • Light source driving method and device for image projection

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Embodiment Construction

[0017] image 3 It is a schematic block diagram of a light source driving device according to an embodiment of the present invention. Such as image 3 As shown, the light source driving device 300 is used to drive the light emitting element 301 so that the light emitting element 301 generates a corresponding light beam. Wherein, the light emitting element 301 can be, for example, a laser diode (laser diode), and can be applied on a projection device. In addition, the light source driving device 300 includes a controller 310 and a driver 320 . The driver 320 is electrically connected between the controller 310 and the light emitting element 301 and is used to drive the light emitting element 301 .

[0018] In operation, the light source driving device 300 receives the frame F, wherein the frame F is composed of a plurality of pixels, and each pixel has corresponding image information. In addition, the light source driving device 300 generates an estimated temperature value ...

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Abstract

The invention provides a light source driving method and an apparatus used for image projection. The light source driving method includes following steps: selecting at least an image of a part of image information and performing statistics of the image information to generate a statistics result; estimating the temperature change of a light-emitting element according to the statistics result to generate a temperature estimation value; and controlling a drive according to the temperature estimation value in order to correct a driving value outputted by the drive.

Description

technical field [0001] The present invention relates to a light source driving method and device, and in particular to a light source driving method and device for image projection. Background technique [0002] Projection devices generally use light-emitting elements to generate projected image beams, and currently common light-emitting elements include laser diodes. Taking the laser diode as an example, the existing projection device generally controls the driving current of the laser diode according to the image information (such as image color, color temperature, brightness, etc.) of the screen content to generate an image beam corresponding to the image information. Such as figure 1 as shown, figure 1 It is the relationship diagram of the image information in the prior art to the driving current of the laser diode. According to the image information required by the content of the screen, the projection device can use such as figure 1 The relationship between the ima...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03B21/14H05B37/02
Inventor 林文隆李张丰许嘉豪
Owner LITE ON ELECTRONICS (GUANGZHOU) LTD