US 7,525,531 B2
Method for manufacturing lighting device, image display, liquid crystal monitor, liquid crystal television, liquid crystal information terminal, and light guide plate
Akifumi Ogiwara, Kida-gun (Japan); Kazunori Komori, Sanda (Japan); Junko Asayama, Suita (Japan); and Yasunori Kuratomi, Sanda (Japan)
Assigned to Toshiba Matsushita Display Technology Co., Ltd., Tokyo (Japan)
Appl. No. 10/343,463
PCT Filed Jul. 25, 2001, PCT No. PCT/JP01/06396
§ 371(c)(1), (2), (4) Date May 06, 2003,
PCT Pub. No. WO02/14740, PCT Pub. Date Feb. 21, 2002.
Claims priority of application No. 2000-230450 (JP), filed on Jul. 31, 2000; application No. 2000-313157 (JP), filed on Oct. 13, 2000; application No. 2000-313161 (JP), filed on Oct. 13, 2000; and application No. 2000-343267 (JP), filed on Nov. 10, 2000.
Prior Publication US 2003/0210222 A1, Nov. 13, 2003
Int. Cl. G09G 3/36 (2006.01)
U.S. Cl. 345—103  [345/102] 4 Claims
OG exemplary drawing
 
1. An image display comprising:
a lighting device;
a liquid crystal display panel that is adapted to cause the light that comes out of said light device to travel through a liquid crystal layer forming a display screen with varied transmittance to display an image; and
a driving means that is adapted to alter the transmittance of said liquid crystal display panel to display an image corresponding to a video signal, characterized in that the lighting device includes:
a light source;
a light exit surface through which the light from said light source comes out; and
a luminance distribution setting alteration means that alters the setting of the luminance distribution on the light exit surface, the luminance distribution setting alteration means being adapted to determine a luminance histogram of a pixel in the video signal and alters the luminance distribution on the light exit surface according to said determined histogram,
wherein said luminance distribution setting alteration means is arranged between said light source and said light exit surface and said luminance distribution setting alteration means directly alters the distribution setting of the luminance from said light source.