| 摘要 |
In order to correct the gray level of a liquid crystal display ( 100 ), based upon a control signal ( 21 ) from a computer ( 2 ) for setting an LUT in the liquid crystal display ( 100 ), a signal source ( 3 ) generates a group of analog RGB signals ( 11 ) having values corresponding to various gradients, and gives these to an analog/digital converter ( 4 ). Moreover, a luminance meter ( 1 ) measures a gray level, for example, the luminance ( 14 ), displayed by a liquid crystal display panel ( 6 ). Data ( 15 ) corresponding to the luminance ( 14 ) measured by the luminance meter ( 1 ) is given to a computer ( 2 ). The computer ( 2 ) compares values of the group of RGB signals ( 11 ) outputted by the signal source ( 3 ) and the value of the data ( 15 ), and stores the resulting conversion characteristic ( 16 ) in an LUT memory means ( 5 ). The application of a rewritable memory, such as a RAM and an EEPROM, as the LUT memory means ( 5 ) makes it possible to cancel individual differences in the display characteristic of the display panel, and consequently to obtain a desired gray level. Thus, the relationship between the input signal and the gray level so as to have a desired characteristic is obtained.
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