Liquid crystal display and method of adjusting brightness for the same

A liquid crystal display, brightness technology, applied in static indicators, instruments, nonlinear optics, etc., can solve problems such as wasting backlight power

Inactive Publication Date: 2007-12-12
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, conventional uniform backlights use the same backlight brightness for dark or bright images
Therefore, the power required to illuminat...

Method used

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  • Liquid crystal display and method of adjusting brightness for the same
  • Liquid crystal display and method of adjusting brightness for the same

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Embodiment Construction

[0047] Certain exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0048] Matters defined in the description, such as detailed construction and component descriptions, are provided to assist in a comprehensive understanding of the present invention. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the spirit and scope of the invention. Also, well-known functions or constructions are omitted for clarity and conciseness.

[0049] FIG. 1 is a schematic block diagram showing the structure of a liquid crystal display (LCD) according to an embodiment of the present invention. Referring to FIG. 1 , an image processor 100 processes input image information to output image data divided into red, green, and blue (R, G, and B) signals to a controller 200 .

[0050] The controller 200 calcula...

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Abstract

A liquid crystal display (LCD) and method of adjusting brightness for the LCD are provided. The LCD includes a light emitter including a plurality of luminescent bodies which are divided into a predetermined number of partial areas, a backlight driver connected to the light emitter to control the brightness of each of the partial areas of the light emitter, and a controller for calculating a representative value for adjusting the brightness of each of the partial areas of the light emitter in accordance with an input image signal and outputting the representative value as a brightness adjustment signal for adjusting the brightness of each of the partial areas to the backlight driver. Thus, the brightness of each of partial areas of a backlight can be adjusted in accordance with the input image signal to improve a contrast ratio. Also, a representative value to be used for adjusting the brightness of each of the partial areas can be lowered by a predetermined ratio to effectively reduce power needed for lighting the backlight. Also, light loss and light gain occurring between neighboring partial areas can be compensated to improve the contrast ratio, and image artifacts can be reduced.

Description

technical field [0001] The present invention relates to a liquid crystal display (LCD) and a method for adjusting its brightness. More particularly, the present invention relates to a method capable of adjusting the brightness of each partial area of ​​a backlight according to an input image signal, thereby improving contrast, and effectively reducing a representative value for adjusting the brightness of each partial area by a predetermined ratio. An LCD that reduces the power required to illuminate a backlight and a method for implementing the LCD. Background technique [0002] Generally, liquid crystal displays (LCDs) are used in televisions (TVs), notebook computers, desktop computers, etc., to display images. Since liquid crystals used in such LCDs cannot emit light by themselves, LCDs must use light emitted from an additional light source. Accordingly, the LCD is provided with a backlight forming a light source on a rear surface of a liquid crystal panel, thereby dis...

Claims

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Application Information

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IPC IPC(8): G02F1/133G02F1/13357G09G3/34G09G3/36G02F1/1335
CPCG02F1/1336G09G3/3406G09G2320/0626G09G2360/16
Inventor 郑俊镐陈韩锋洪昌完朴永浚成埈豪催勋成基范金炯来
Owner SAMSUNG ELECTRONICS CO LTD
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