LIQUID CRYSTAL DISPLAY DEVICE AND TELEVISION RECEIVER

• Main Authors: IKEYAMA, TETSUO, ONIKI, MOTOYUKI
• Format: Patent
• Language: English; French; German
• Published: 07.08.2013
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

Provided are a liquid crystal display apparatus and a television receiver which enable an improvement in visibility in a low-tone range in a configuration in which the brightness of a backlight is changed on the basis of brightness information relating to an image, the liquid crystal display apparatus is provided with an APL curve setting portion and a histogram luminance modulating portion which adjust the brightness of the backlight and a tone signal on the basis of the average brightness of the image and the brightness histogram of the image, and a black extending portion which applies gamma correction to the tone signal adjusted by the histogram luminance modulating portion on the basis of a previously set gamma value, wherein a gamma characteristic used for the gamma correction in the black extending portion is set by, on the basis of correspondence information indicating the correspondence relationship between a combination of the brightness of backlight adjusted by the histogram luminance modulating portion and the environmental illuminance of the installation site of a liquid crystal panel, and a plurality of gamma values (³2.0-2.4), selecting a gamma value corresponding to the combination.