公开(公告)号：EP1391651A4

公开(公告)日：2005-10-12

申请号：EP01274160

申请日：2001-12-21

Applicant: IBM

Inventor： HORIBE AKIHIRO ,  NISHIKAI AKIKO

IPC: F21V8/00

CPC classification number: G02B6/0028 ,  G02B6/0046 ,  G02B6/0071 ,  G02B6/009

Abstract: An illuminator, a liquid crystal display and a lamp socket in which a dark part, so-called angular irregularities, is improved. The illuminator comprises a light guide plate (28) including a light beam incidence face (46) and an emission face (46) for radiating a light beam from the incident face, a light source (30) including a light emitting part and a non-light emitting part disposed contiguously to the light guide plate (28) in order to irradiate it with a light beam, a lamp socket (34) for containing at least one end of the light source (30), and a reflector (32) extending along the light source (30)and reflecting the light beam from the light source (30). The lamp socket (34) scatters light having wavelength of 300-900 nm and has a transmittance of 20-90%. The invention also relates to a display comprising the aforementioned side light apparatus.

公开(公告)号：CA2317820C

公开(公告)日：2007-04-10

申请号：CA2317820

申请日：2000-09-07

Applicant: IBM

Inventor： TAIRA YOCHI ,  YAMADA FUMIAKI ,  NISHIKAI AKIKO

IPC: G02F1/13357 ,  G09F9/00 ,  F21V8/00 ,  F21Y103/00 ,  G02B6/00 ,  G02F1/13 ,  G02F1/1335

Abstract: The present invention realizes the backlight apparatus which can generates t he light with an angle spread or an angle less than 10 degrees FWHM, which can reduce a fabrication cost, and which can improve the efficiency of usage of the light from the light source. A backlight apparatus comprises: a wedge type light guide of a refractive index n1, having a top surface, a bottom surface and a side surface; a light source for directing light to said side surface of said wed ge type light guide; a first light transmission layer of a refractive index n2, which is smaller than sai d refractive index n1, having a top surface and a bottom surface, wherein said top surface of said first light transmission layer is attached to said bottom surface of said wedge type light guide; and a light deflecting layer having a top surface attached to said bottom surface of said first light transmission layer for deflecting the incident light from said first light transmission layer towar d said top surface of said wedge type light guide.

公开(公告)号：HK1062321A1

公开(公告)日：2004-10-29

申请号：HK04105321

申请日：2004-07-21

Applicant: IBM

Inventor： HORIBE AKIHIRO ,  NISHIKAI AKIKO

IPC: F21V20060101 ,  F21V8/00 ,  G02F20060101

Abstract: To provide a lighting system that resolves the problems presented by dark areas, so called shading at the corner, and a liquid crystal display device and a lamp socket therefor. According to the present invention, a lighting system comprises: a light guide plate 28, having a plane 46 of incidence into which light enters and a plane 48 of emission from which the light is emitted, a light source 30, having a luminous portion and a non-luminous portion, that is located adjacent to the light guide plate 28 so that the light guide plate 28 is irradiated by light, a lamp socket 34, for holding at least one end of the light source 30, and a reflector 32, which is extended along the light source 30 for reflecting the light produced by the light source 30, and wherein the lamp socket 34 exhibits a transmittance of 20 to 90% in wavelengths of from 300 to 900 nm, and the light is scattered through the lamp socket. The present invention also relates to a display device using the above described side light device.

公开(公告)号：AT431922T

公开(公告)日：2009-06-15

申请号：AT01274160

申请日：2001-12-21

Applicant: IBM

Inventor： HORIBE AKIHIRO ,  NISHIKAI AKIKO

IPC: F21V8/00

Abstract: To provide a lighting system that resolves the problems presented by dark areas, so called shading at the corner, and a liquid crystal display device and a lamp socket therefor. According to the present invention, a lighting system comprises: a light guide plate 28, having a plane 46 of incidence into which light enters and a plane 48 of emission from which the light is emitted, a light source 30, having a luminous portion and a non-luminous portion, that is located adjacent to the light guide plate 28 so that the light guide plate 28 is irradiated by light, a lamp socket 34, for holding at least one end of the light source 30, and a reflector 32, which is extended along the light source 30 for reflecting the light produced by the light source 30, and wherein the lamp socket 34 exhibits a transmittance of 20 to 90% in wavelengths of from 300 to 900 nm, and the light is scattered through the lamp socket. The present invention also relates to a display device using the above described side light device.

公开(公告)号：CA2317820A1

公开(公告)日：2001-04-08

申请号：CA2317820

申请日：2000-09-07

Applicant: IBM

Inventor： TAIRA YOCHI ,  YAMADA FUMIAKI ,  NISHIKAI AKIKO

IPC: G09F9/00 ,  F21V8/00 ,  F21Y103/00 ,  G02B6/00 ,  G02F1/13 ,  G02F1/1335 ,  G02F1/13357

Abstract: The present invention realizes the backlight apparatus which can generates t he light with an angle spread or an angle less than 10 degrees FWHM, which can reduce a fabrication cost, and which can improve the efficiency of usage of the light from the light source. A backlight apparatus comprises: a wedge type light guide of a refractive index n1, having a top surface, a bottom surface and a side surface; a light source for directing light to said side surface of said wed ge type light guide; a first light transmission layer of a refractive index n2, which is smaller than sai d refractive index n1, having a top surface and a bottom surface, wherein said top surface of said first light transmission layer is attached to said bottom surface of said wedge type light guide; and a light deflecting layer having a top surface attached to said bottom surface of said first light transmission layer for deflecting the incident light from said first light transmission layer towar d said top surface of said wedge type light guide.

公开(公告)号：DE60138770D1

公开(公告)日：2009-07-02

申请号：DE60138770

申请日：2001-12-21

Applicant: IBM

Inventor： HORIBE AKIHIRO ,  NISHIKAI AKIKO

IPC: F21V8/00

Abstract: To provide a lighting system that resolves the problems presented by dark areas, so called shading at the corner, and a liquid crystal display device and a lamp socket therefor. According to the present invention, a lighting system comprises: a light guide plate 28, having a plane 46 of incidence into which light enters and a plane 48 of emission from which the light is emitted, a light source 30, having a luminous portion and a non-luminous portion, that is located adjacent to the light guide plate 28 so that the light guide plate 28 is irradiated by light, a lamp socket 34, for holding at least one end of the light source 30, and a reflector 32, which is extended along the light source 30 for reflecting the light produced by the light source 30, and wherein the lamp socket 34 exhibits a transmittance of 20 to 90% in wavelengths of from 300 to 900 nm, and the light is scattered through the lamp socket. The present invention also relates to a display device using the above described side light device.

公开(公告)号：CA2520656A1

公开(公告)日：2001-04-08

申请号：CA2520656

申请日：2000-09-07

Applicant: IBM

Inventor： NISHIKAI AKIKO ,  TAIRA YOCHI ,  YAMADA FUMIAKI

IPC: G02B6/00 ,  G02F1/13357

Abstract: The present invention realizes the backlight apparatus which can generates t he light with an angle spread or an angle less than 10 degrees FWHM, which can reduce a fabrication cost, and which can improve the efficiency of usage of the light from the light source. A backlight apparatus comprises: a wedge type light guide of a refractive index n1, having a top surface, a bottom surface and a side surface; a light source for directing light to said side surface of said wed ge type light guide; a first light transmission layer of a refractive index n2, which is smaller than sai d refractive index n1, having a top surface and a bottom surface, wherein said top surface of said first light transmission layer is attached to said bottom surface of said wedge type light guide; and a plurality of prisms attached on said top surface of said light transmission layer for directing the incident light from said light transmission layer toward a light path along a direction of a normal line of said top surface of said light transmission layer.