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Method for dynamically reducing power of liquid crystal display

A liquid crystal display, dynamic technology, applied in the direction of static indicators, instruments, etc.

Inactive Publication Date: 2009-09-23
TPV ELECTRONICS (FUJIAN) CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The current liquid crystal display products are designed according to the Energy Star standard or according to the special requirements of customers. When the display is in use or in the energy-saving state, it is designed to consume relatively fixed power, so that the power consumption of the display in use is fixed. , will not properly adjust the power consumption according to the current brightness of the display, so as to achieve the effect of high efficiency and energy saving

Method used

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  • Method for dynamically reducing power of liquid crystal display
  • Method for dynamically reducing power of liquid crystal display
  • Method for dynamically reducing power of liquid crystal display

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Embodiment Construction

[0025] A method for dynamically reducing the power of a liquid crystal display of the present invention mainly includes the following steps:

[0026] 1. Set the dynamic brightness control (DBC) register value related to the lamp current according to the requirements of image scaling control IC1;

[0027] (1) Assuming the initial backlight limit is 25%,

[0028] Offset(Reg0x437) may set 0xFF*25%=0x40, Reg0x433[7:6]=b10;

[0029] (2) Set the PWM DBC frequency value:

[0030] Reg0x430[2]=b0, (reference clock 12M)

[0031] Reg0x433[3:0]=b1010, (Divider 1=1024)

[0032] Reg0x434[7:0]=0x31, (Divider 2=49)

[0033] PWM_DBC frequency=12M / (1024*49)=240Hz

[0034] (3) Set DBC PWM control value:

[0035] Reg0x436[7:6]=b 11, (assume apply to PWMB)

[0036] (4) Set DBC PWM min / max:

[0037] Reg0x432[7:0]=0x00, Reg0x435[7:0]=0xff;

[0038] (5) Disable DBC:

[0039] Reg0x430[0]=b0;

[0040] 2. Set the association table (table) between the backlight brightness value and the color g...

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Abstract

The invention provides a method for dynamically reducing the power of a liquid crystal display, comprising the following steps of firstly working out rate of pulse width modulation and color gain in each adjustment step by obtaining the brightness value of a panel corresponding to each order of the pulse width modulation and the brightness value corresponding to each order of the color gain, subsequently preparing a dynamic brightness control list and writing the list in an MCU; collecting the brightness data of the current input video signal in real time by an image zoom control IC after electrifying the liquid crystal display, counting the data amount of the frame distribution on each grey order, controlling the PWM / duty-cycle of the lamp tube current and the arrangement of the color gain value according to the frequency of the current input video signal in a dynamic brightness control register, the control frequency of the lamp tube current PWM provided by the MCU and the dynamic brightness control list, and synchronously completing the objects of reducing the pulse width modulation and improving the color gain, thus keeping the uniform brightness of the current frame unchanged.

Description

【Technical field】 [0001] The invention relates to the field of liquid crystal displays or liquid crystal TVs, and provides a method for dynamically reducing the power of liquid crystal displays. 【Background technique】 [0002] The current liquid crystal display products are all designed to consume relatively fixed power consumption when the display is in use or in an energy-saving state in accordance with the Energy Star standard or according to the special requirements of customers, so that the power consumption of the display in use is fixed. , will not properly adjust the power consumption according to the current brightness of the display, so as to achieve the effect of high efficiency and energy saving. 【Content of invention】 [0003] The purpose of the present invention is to provide a method that can dynamically change the power consumed by the liquid crystal display according to the current brightness of the liquid crystal display while keeping the brightness const...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36G09G3/34G09G3/20
Inventor 高华平关芸
Owner TPV ELECTRONICS (FUJIAN) CO LTD
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