JPS6456402A - Brightness adjusting member - Google Patents
Brightness adjusting memberInfo
- Publication number
- JPS6456402A JPS6456402A JP21379887A JP21379887A JPS6456402A JP S6456402 A JPS6456402 A JP S6456402A JP 21379887 A JP21379887 A JP 21379887A JP 21379887 A JP21379887 A JP 21379887A JP S6456402 A JPS6456402 A JP S6456402A
- Authority
- JP
- Japan
- Prior art keywords
- area density
- distribution
- fine patterns
- dotty
- expressed
- 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
Links
Landscapes
- Optical Elements Other Than Lenses (AREA)
Abstract
PURPOSE:To provide a surface light source which is of a thin type and has a uniform brightness distribution by forming grating-shaped or dotty light reflective fine patterns having an area density distribution on the surface of a light transmissive film or sheet material in such a manner that said patterns are expressed by the specific area density function. CONSTITUTION:The grating-shaped or dotty light reflective fine patterns having the area density distribution are formed on the surface of the light transmissive film or sheet material. The fine patterns are formed in such a manner that the area density function Ra(X) is expressed by Ra(X)=A exp(-X<m>/2.S<m>) (where 0.5<A<0.9, 1.3<m<2.5, S is a positive real number) when an X-Y coordinate system is so determined that the direction of the invariable density distribution is the Y-axis. The approximately uniform brightness distribution is thereby obtd.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21379887A JPS6456402A (en) | 1987-08-27 | 1987-08-27 | Brightness adjusting member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21379887A JPS6456402A (en) | 1987-08-27 | 1987-08-27 | Brightness adjusting member |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6456402A true JPS6456402A (en) | 1989-03-03 |
Family
ID=16645222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21379887A Pending JPS6456402A (en) | 1987-08-27 | 1987-08-27 | Brightness adjusting member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6456402A (en) |
-
1987
- 1987-08-27 JP JP21379887A patent/JPS6456402A/en active Pending
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