DISPLAY CHARACTERISTIC CORRECTING CIRCUIT OF FLUORESCENT SUBSTANCE IN DISPLAY DEVICE

• Main Authors: KOBAYASHI MASAYUKI, NAKAJIMA MASAMICHI, DENDA ISATO, MATSUNAGA SEIJI, KOSAKAI ASAO, AIDA TORU, ONODERA JUNICHI
• Format: Patent
• Language: English
• Published: 12.12.1997
• Edition: 6
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; PHYSICS; SEALS

PROBLEM TO BE SOLVED: To maintain the display characteristic of a display panel constant and to display an optimum picture corresponding to the inputted data regardless of the light emitting time of the fluorescent substance provided on the display panel. SOLUTION: The display device display the corresponding picture by light emitting the fluorescent substance of a plasma display panel(PDP) 20 (an example of a display panel) based on inputted data. The display characteristic compensating circuit has fluorescencr light emitting time measuring sections 12r to 12b which measure the light emitting time of R(red), G(green) and B(blue) phosphors, RGB coefficient converting sections 14r to 14b which obtain the corresponding coefficients among beforehand stored plural coefficients and RGB input data processing sections 16r top 16b which correct the input data using the obtained coefficients and output the data to the PDP 20. Even though the display characteristic of the fluorescencer is varied by the light emitting time, the coefficients corresponding to the variation are obtained by the sections 14r to 14b, the input data are compensated for and outputted to the PDP 20. Thus, the color picture having a proper white balance and a proper chromaticity is displayed.