JPH04280225A - Back light - Google Patents

Back light

Info

Publication number
JPH04280225A
JPH04280225A JP6769991A JP6769991A JPH04280225A JP H04280225 A JPH04280225 A JP H04280225A JP 6769991 A JP6769991 A JP 6769991A JP 6769991 A JP6769991 A JP 6769991A JP H04280225 A JPH04280225 A JP H04280225A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
surface
light
light source
reflecting plate
linear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6769991A
Inventor
Keiji Kashima
Osamu Shoji
Naoki Yoshida
Original Assignee
Tosoh Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To provide a sufficient brightness with a small size by providing a linear light source the surface of which is covered with a light reflecting plate and specifying the distance between its surface and the light reflecting plate surface covering it.
CONSTITUTION: A light diffuse reflecting plate 3 covers almost the whole surface of the face of a light guide plate 1 covered with a light scattering material 7. A liner light source 4 is covered with a reflector 5 having a clearance for entering light to the end part of the light guide plate 1 while keeping a clearance of a certain width with the light source surface, and a light reflecting plate 6 is disposed in the state covering the linear light source 4 between the reflector 5 and the linear light source 4. In this case, the surface of the linear light source 4 and the light reflecting plate 6 surface covering it are disposed while keeping a certain condition. Namely, when the side opposite to the light guide plate 1 of the linear light source 4 surface is the inside and the opposite side the outside, the distance between the surface of the linear light source 4 in nearly the center part of the outside and the light reflecting plate 6 surface covering it is less than 3 mm, and the distance in the part except the center part of the outside is smaller than that in the center part or substantially 0mm.
COPYRIGHT: (C)1992,JPO&Japio
JP6769991A 1991-03-08 1991-03-08 Back light Pending JPH04280225A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6769991A JPH04280225A (en) 1991-03-08 1991-03-08 Back light

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP6769991A JPH04280225A (en) 1991-03-08 1991-03-08 Back light
EP19920102820 EP0500089B1 (en) 1991-02-21 1992-02-20 Back lighting device
US07838337 US5262928A (en) 1991-02-21 1992-02-20 Back lighting device
DE1992612662 DE69212662D1 (en) 1991-02-21 1992-02-20 A device for backlighting
DE1992612662 DE69212662T2 (en) 1991-02-21 1992-02-20 A device for backlighting

Publications (1)

Publication Number Publication Date
JPH04280225A true true JPH04280225A (en) 1992-10-06

Family

ID=13352464

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6769991A Pending JPH04280225A (en) 1991-03-08 1991-03-08 Back light

Country Status (1)

Country Link
JP (1) JPH04280225A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0284618A (en) * 1988-06-02 1990-03-26 Mitsubishi Rayon Co Ltd Panel light source element
JPH02160215A (en) * 1988-08-18 1990-06-20 Nippon Sekiei Glass Kk Back light for liquid crystal panel
JPH039305A (en) * 1989-06-07 1991-01-17 Mitsubishi Petrochem Co Ltd Backlight device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0284618A (en) * 1988-06-02 1990-03-26 Mitsubishi Rayon Co Ltd Panel light source element
JPH02160215A (en) * 1988-08-18 1990-06-20 Nippon Sekiei Glass Kk Back light for liquid crystal panel
JPH039305A (en) * 1989-06-07 1991-01-17 Mitsubishi Petrochem Co Ltd Backlight device

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