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LCD device

A liquid crystal display device and liquid crystal display technology, which are applied in static indicators, image communication, instruments, etc., can solve problems such as difficulty in preparing LUTs

Inactive Publication Date: 2009-05-20
LG DISPLAY CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is very difficult to prepare LUT for each additional condition

Method used

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no. 1 example

[0033] Refer below figure 1 -4 An embodiment of the present invention will be described. It should be noted that the present invention is not limited to the following description.

[0034] FIG. 2 is a block diagram showing the configuration of a liquid crystal display device (LCD10) according to this embodiment.

[0035] The LCD10 includes a liquid crystal screen 3, a common circuit 4, a grayscale circuit 5, a digital / analog converter (DAC) 6, an LCD controller 1, a frame memory (FM) 2, a video processing controller (VPC) 7, a temperature sensor 8 and computer9.

[0036] The liquid crystal panel 3 includes a substrate (screen) on which pixels are provided. For example, a plurality of source bus lines 61 parallel to each other are provided in the longitudinal direction of the screen, while a plurality of scan lines 62 are provided in parallel to each other in the lateral direction of the screen.

[0037]Source bus lines 61 and scan lines 62 cross each other. At each inters...

no. 2 example

[0102] Another embodiment is described below. It should be noted that elements having the same functions as those in the first embodiment are given the same reference numerals, and descriptions thereof will be omitted here.

[0103] According to the second embodiment, the interpolation operation is performed based on the local coordinate system using both Tables 1 and 2. Figure 5 shows such a local coordinate system for interpolation operations.

[0104] As shown in Figure 5, in the local coordinate system with the three axes of target gray value, current gray value, and temperature value, except for the target gray local axis (ξ-axis) and current gray An additional axis (ζ-axis) is provided in addition to the local axis (η-axis) to form a three-dimensional local coordinate system, the ζ-axis being perpendicular to the ξ-axis and the η-axis.

[0105] It should be noted that, for better understanding, the following describes the case of calculating the interpolation value K r...

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Abstract

A liquid crystal display apparatus includes an applied gradation value acquiring section for receiving gradation data of a frame to be displayed, gradation data of a frame to be outputted, gradation data of the current frame supplied from a frame memory and measured data from a temperature sensor. An interpolation operation is then carried out in reference to look-up tables stored in a look-up table memory so as to calculate a target applied gradation data required for gradation display. The section sets for each LUT (a) a coordinate system in which a lattice point is represented by a combination of the gradation data of the current frame and the gradation data of the target frame and (b) a local coordinate system having lattice points corresponding to the target gradation data in the coordinate system; carries out interpolation operation by use of the local coordinate system, and carries out further interpolation operation based on the interpolated value (table interpolated value), in accordance with the measured data so as to calculate the target applied gradation data. The adoption of the interpolation by use of the local coordinate system enables the finding of the target applied gradation data (interpolated value) with higher accuracy, while a variety of additional conditions are taken into consideration.

Description

field of invention [0001] The present invention generally relates to liquid crystal display devices. Preferably, the present invention relates to a liquid crystal display device used in televisions, OA (Office Information) equipment, and as a monitor in CAD (Computer Aided Design). Background of the invention [0002] Due to liquid crystal display devices (a) having features such as small footprint and energy saving and (b) recent advances in performance such as viewing angle, contrast ratio, color reproducibility and response speed, liquid crystal display devices have almost become the preferred choice over cathode ray tubes. image display device. Therefore, it can be expected that such liquid crystal display devices will be more commonly and widely used in monitors of televisions and office automation devices in the future. [0003] In general, when a voltage is applied to a liquid crystal cell, the main axis (guide cell) of the liquid crystal material (liquid crystal mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20G02F1/133
CPCG09G3/3406G09G3/36G09G2320/041H04N1/407
Inventor 繁田光浩塩見誠富沢一成宮田英利
Owner LG DISPLAY CHINA CO LTD