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Method for controlling power of image display light emission device, image display light emission device, display device, and television reception device

A technology of image display and light-emitting device, applied in static indicators, instruments, etc., can solve the problem of inability to control the power of backlight source, and achieve the effect of increasing power consumption

Active Publication Date: 2013-08-21
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in this case, it is impossible to determine the limit control of the backlight power based on the APL value.

Method used

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  • Method for controlling power of image display light emission device, image display light emission device, display device, and television reception device
  • Method for controlling power of image display light emission device, image display light emission device, display device, and television reception device
  • Method for controlling power of image display light emission device, image display light emission device, display device, and television reception device

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Embodiment approach

[0112] The present invention is not limited to the embodiments described above and illustrated in the drawings, and for example, the following embodiments are also included in the technical scope of the present invention.

[0113] (1) In the above-mentioned embodiment, the correspondence between the LED driver 21 and the light-emitting diode (light-emitting unit 20 ) is not limited to Figure 4 the way shown. For example, it can also be as Figure 9 As shown, a plurality of light emitting diodes connected in columns are driven by one LED driver 21 . Figure 9 It shows that four red light-emitting diodes (DR1-R4) connected in series are driven by one LED driver 21 (R1), and four green light-emitting diodes (DG1-DG4) connected in series are driven by one LED driver 21 (G1). , an example in which four blue light-emitting diodes (DB1-DB4) connected in columns are driven by one LED driver 21 (B1). In such a case, the number of LED drivers 21 used can be reduced. In this case, t...

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Abstract

In a method of controlling power of a light emitting device for image display that irradiates illumination light from divided regions, light emission brightness data of each light emitting element of the light emitting device is determined based on image data for image display (S20). Power in each region and total light emission power are computed based on the light emission brightness data of each light emitting element for each region (S40). If the computed total light emission power exceeds predetermined allowable power, the power in each region is limited so that the total light emission power is equal to or less than the predetermined allowable power (S50).

Description

technical field [0001] The present invention relates to a power control method of a light-emitting device for image display, a light-emitting device for image display, a display device and a television receiver, and in particular to a control method related to power limitation of a light-emitting device for image display. Background technique [0002] Conventionally, the power control (brightness control) of the backlight in the case of using CCFL (cold cathode fluorescent tube) or the like as the illumination device (backlight) of liquid crystal display devices such as LCD TVs is based on the APL value (video average luminance value) conduct. [0003] In addition, recently, a backlight using a plurality of LEDs (Light Emitting Diodes: Light Emitting Diodes) is known. In addition, there is known a backlight that is equipped with an illumination mechanism that divides illumination light generated by an LED backlight into a plurality of areas (area) and emits it, and can cont...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G02F1/133G09G3/20G09G3/34
CPCG09G2360/16G09G2330/021G09G3/3426G09G2320/064
Inventor 藤原晃史村井贵行山本智彦
Owner SHARP KK