IMAGE DISPLAY DEVICE

• Main Author: KATSU YOSHIHIRO
• Format: Patent
• Language: English
• Published: 10.02.2010
• 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 HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

An image display device with a partial ignition operable lighting unit is provided for making it possible to improve image quality by the reduction of uneven brightness or uneven chromaticity. Illumination light (Lout) from a lighting unit (10), which ignites in a unit of a partial ignition operable light unit (4), is used for the display of an image on a liquid crystal display panel (2) in accordance with a video signal. The illumination light (Lout) from the lighting unit (10), which ignites in a unit of the partial ignition operable light unit (4), is received by a plurality of illumination light sensors (13) in the lighting unit (10) and, based on the received light data (D1), a light emitting amount of each partial ignition operable light unit (4) is controlled. Further, the disposition of the illumination light sensors (13) is arranged for not less than two illumination light sensors (13) to receive the light (Lout) from one partial ignition operable light unit (4). According to the present invention, the reliability of a value of the received light data (D1) by the illumination light sensor (13) can be improved. With this, even if the receiving characteristics are uneven between the illumination light sensors (13), uneven light emitting characteristics, if any, can be reduced between the partial ignition operable light units (4).