JPS6454432A - Reflection type enlarging and projecting device - Google Patents
Reflection type enlarging and projecting deviceInfo
- Publication number
- JPS6454432A JPS6454432A JP62210617A JP21061787A JPS6454432A JP S6454432 A JPS6454432 A JP S6454432A JP 62210617 A JP62210617 A JP 62210617A JP 21061787 A JP21061787 A JP 21061787A JP S6454432 A JPS6454432 A JP S6454432A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- fresnel lens
- reflection type
- projecting device
- image
- 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
- Overhead Projectors And Projection Screens (AREA)
- Liquid Crystal (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
PURPOSE:To obtain small-sized and low-costed reflection type enlarging and projecting device which has excellent quality of display by specifying a distance between the liquid crystal layer of a transmission type liquid crystal cell and the reflecting film of a Fresnel lens. CONSTITUTION:The distance between the liquid crystal layer 2 of the transmission type liquid crystal cell 1 and the reflecting film 7 of the Fresnel lens 8 is set <=1.5mm. Namely, supposing that thicknesses of a lower substrate 4, a lower polarization plate 6 and the Fresnel lens 8 are t1-t3 respectively, the lower substrate 4, the lower polarization plate 6 or the Fresnel lens 8 are formed in thin type so that the thickness of t1+t2+t3 is <=1.5mm. By forming them in the thin type, the shift of image or the blurring of image is not caused in the reflected enlarged and projected image, which can not be regarded as important in a practical use even if it is caused. Thus, the device can be applied as the reflection type projecting device without troubles and the small-sized portable compact device in which contrast is high can be obtained.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62210617A JPS6454432A (en) | 1987-08-25 | 1987-08-25 | Reflection type enlarging and projecting device |
US07/091,668 US4818074A (en) | 1986-09-03 | 1987-09-01 | Projection device for irradiating a light to a display device and optically magnifying and projecting a reflection light therefrom |
GB8720627A GB2196165B (en) | 1986-09-03 | 1987-09-02 | A projection device |
DE19873729512 DE3729512C2 (en) | 1986-09-03 | 1987-09-03 | Projection device for the representation and enlargement of images |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62210617A JPS6454432A (en) | 1987-08-25 | 1987-08-25 | Reflection type enlarging and projecting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6454432A true JPS6454432A (en) | 1989-03-01 |
Family
ID=16592291
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62210617A Pending JPS6454432A (en) | 1986-09-03 | 1987-08-25 | Reflection type enlarging and projecting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6454432A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04155323A (en) * | 1990-10-18 | 1992-05-28 | Elmo Co Ltd | Reflection type overhead projector |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60112022A (en) * | 1983-11-22 | 1985-06-18 | Matsushita Electric Ind Co Ltd | Liquid crystal display element |
JPS6299725A (en) * | 1985-10-28 | 1987-05-09 | Fujitsu Ltd | Projection type liquid crystal display element |
JPS6318339A (en) * | 1986-07-10 | 1988-01-26 | Sharp Corp | Reflection type liquid crystal overhead projector |
JPS63318522A (en) * | 1987-06-22 | 1988-12-27 | Fuji Photo Film Co Ltd | Display panel for overhead projector |
-
1987
- 1987-08-25 JP JP62210617A patent/JPS6454432A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60112022A (en) * | 1983-11-22 | 1985-06-18 | Matsushita Electric Ind Co Ltd | Liquid crystal display element |
JPS6299725A (en) * | 1985-10-28 | 1987-05-09 | Fujitsu Ltd | Projection type liquid crystal display element |
JPS6318339A (en) * | 1986-07-10 | 1988-01-26 | Sharp Corp | Reflection type liquid crystal overhead projector |
JPS63318522A (en) * | 1987-06-22 | 1988-12-27 | Fuji Photo Film Co Ltd | Display panel for overhead projector |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04155323A (en) * | 1990-10-18 | 1992-05-28 | Elmo Co Ltd | Reflection type overhead projector |
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