JPH0481445U - - Google Patents
Info
- Publication number
- JPH0481445U JPH0481445U JP12578790U JP12578790U JPH0481445U JP H0481445 U JPH0481445 U JP H0481445U JP 12578790 U JP12578790 U JP 12578790U JP 12578790 U JP12578790 U JP 12578790U JP H0481445 U JPH0481445 U JP H0481445U
- Authority
- JP
- Japan
- Prior art keywords
- light source
- diffusion plate
- illumination light
- source device
- thickness
- 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.)
- Granted
Links
- 238000005286 illumination Methods 0.000 claims description 6
- 238000009792 diffusion process Methods 0.000 claims description 4
- 210000002858 crystal cell Anatomy 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
第１図は、本考案に係る面光源装置の好適な実
施例の全体を表す概略断面図であり、その上部の
図表は、その照明光の照度分布を表している。第
２図は、従来の面光源装置の全体を表す概略断面
図であり、その上部の図表は、その照明光の照度
分布を表している。
１０……面光源装置、１２ａ，１２ｂ，１２ｃ
……照明用光源、１３……光拡散板、１３ａ……
近接領域、１３ｂ……離間領域、１４……液晶セ
ル、１５……ケース。
FIG. 1 is a schematic cross-sectional view showing the whole of a preferred embodiment of the surface light source device according to the present invention, and the chart at the top shows the illuminance distribution of the illumination light. FIG. 2 is a schematic cross-sectional view showing the entire conventional surface light source device, and the chart at the top shows the illuminance distribution of the illumination light. 10... Surface light source device, 12a, 12b, 12c
...Light source for illumination, 13...Light diffusion plate, 13a...
Proximity region, 13b... Distant region, 14... Liquid crystal cell, 15... Case.
Claims (1)
た光拡散板とからなる面光源装置において、上記
光拡散板が照明用光源と近接している領域におい
ては該拡散板の板厚が厚く、且つ光源から離間し
た領域においては板圧が薄くなるように形成され
ていることを特徴とする、面光源装置。 In a surface light source device comprising an illumination light source and a light diffusion plate provided in front of the illumination light source, the thickness of the diffusion plate is thick in an area where the light diffusion plate is close to the illumination light source. A surface light source device characterized in that the plate thickness is thinner in a region spaced apart from the light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990125787U JPH0530280Y2 (en) | 1990-11-28 | 1990-11-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990125787U JPH0530280Y2 (en) | 1990-11-28 | 1990-11-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0481445U true JPH0481445U (en) | 1992-07-15 |
| JPH0530280Y2 JPH0530280Y2 (en) | 1993-08-03 |
Family
ID=31873373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990125787U Expired - Lifetime JPH0530280Y2 (en) | 1990-11-28 | 1990-11-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0530280Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008300203A (en) * | 2007-05-31 | 2008-12-11 | Toshiba Lighting & Technology Corp | Luminaire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6443393U (en) * | 1987-09-10 | 1989-03-15 | ||
| JPH0262417U (en) * | 1988-10-26 | 1990-05-10 | ||
| JPH0269318U (en) * | 1988-11-16 | 1990-05-25 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1984001299A1 (en) * | 1982-09-30 | 1984-04-12 | Ford Werke Ag | Seat belt positioning device |
-
1990
- 1990-11-28 JP JP1990125787U patent/JPH0530280Y2/ja not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6443393U (en) * | 1987-09-10 | 1989-03-15 | ||
| JPH0262417U (en) * | 1988-10-26 | 1990-05-10 | ||
| JPH0269318U (en) * | 1988-11-16 | 1990-05-25 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008300203A (en) * | 2007-05-31 | 2008-12-11 | Toshiba Lighting & Technology Corp | Luminaire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0530280Y2 (en) | 1993-08-03 |