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Data conversion circuit having look-up table and interpolation circuit and method of data conversion

A technology of conversion circuit and interpolation circuit, applied in instruments, static indicators, etc., can solve the problem of low display image quality

Inactive Publication Date: 2008-07-09
KAWASAKI MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, especially when displaying moving images, the quality of the displayed image is low

Method used

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  • Data conversion circuit having look-up table and interpolation circuit and method of data conversion
  • Data conversion circuit having look-up table and interpolation circuit and method of data conversion
  • Data conversion circuit having look-up table and interpolation circuit and method of data conversion

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Embodiment Construction

[0046] Data conversion circuits according to various exemplary embodiments of the present invention will now be described by referring to the accompanying drawings.

[0047] FIG. 1 is a schematic diagram of an exemplary data conversion circuit according to an embodiment of the present invention. The data conversion circuit 10 shown in FIG. 1 is used as a part of a liquid crystal display device. The data conversion circuit 10 generates a correction value, which corrects the level of the pixel drive signal for driving the liquid crystal display panel, from the signal levels of the current frame and the previous frame of the pixel drive signal. And, the conversion circuit 10 outputs the generated correction value as conversion data.

[0048] Correction circuit 10 includes memory 12 , address conversion circuit 14 , LUT 16 , address detection circuit 18 and interpolation circuit 20 .

[0049] The data conversion circuit 10 receives the pixel driving signal of the current frame a...

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Abstract

To properly convert data without losing its continuity by interpolation from a plurality of output data even with respect to data on and along diagonal lines of a LUT wherein only output data corresponding to representative values of input data is stored.Cells of the LUT includes diagonal cells arranged on diagonal lines and a plurality of pairs of adjacent cells symmetrically arranged on both sides of the diagonal lines, and representative correction values meaning non-execution of data conversion are stored in the diagonal cells, and representative correction values stored in at least a pair of adjacent cells have mutually opposite polarities and are different in absolute values. When cells surrounding an address include at least a pair of adjacent cells, an interpolation circuit substitutes one of the representative correction values stored in the adjacent cells with a substitutional representative correction value having the opposite polarity and the same absolute value and then utilizes the substitutional representative correction value to generate conversion data.

Description

technical field [0001] The present invention relates to a data conversion circuit that generates conversion data by interpolating output values ​​output from a look-up table (LUT) that stores only data corresponding to representative level combinations of an input data set. The invention also relates to a method of data conversion using interpolation. Background technique [0002] In a data conversion circuit utilizing a LUT, output data corresponding to a combination of input data sets are stored in each address of the LUT. By providing the address corresponding to the input dataset, the LUT outputs the output data stored at that address. Therefore, the input dataset is transformed into output data corresponding to the input dataset. [0003] In the data conversion circuit, not all output data corresponding to all combinations of input data are stored in the LUT. That is, in order to reduce the required storage capacity, only output data corresponding to representative l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36G09G3/20G02F1/133
CPCG09G3/3648G09G2340/16G09G2320/0252G09G3/3611
Inventor 沟口裕二
Owner KAWASAKI MICROELECTRONICS
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