Backlight, display apparatus and light source controlling method

• Main Authors: MISONOU, TAKEHIRO, OHYAMA, YUICHI
• Format: Patent
• Language: Chinese; English
• Published: 16.05.2007
• 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; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

A backlight for illuminating the of a display section includes: a plurality of light sources disposed corresponding to a display area of the display section; a diffusion member configured to transmit light from the light sources to the display section; a single photo-sensor; a light guiding member configured to introduce the light from the light sources to the photo-sensor; and an arithmetic operation processing section configured to calculate the luminance or chromaticity of each of the light sources from the luminance or chromaticity detected by the photo-sensor from the light guided by the light guiding member.