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JPS6491116A - Enlargement projection device - Google Patents

Enlargement projection device

Info

Publication number
JPS6491116A
JPS6491116A JP62249156A JP24915687A JPS6491116A JP S6491116 A JPS6491116 A JP S6491116A JP 62249156 A JP62249156 A JP 62249156A JP 24915687 A JP24915687 A JP 24915687A JP S6491116 A JPS6491116 A JP S6491116A
Authority
JP
Japan
Prior art keywords
polarizing plate
liquid crystal
plate
substrate
crystal display
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
JP62249156A
Other languages
Japanese (ja)
Inventor
Kenya Yokoi
Takamichi Enomoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
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
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP62249156A priority Critical patent/JPS6491116A/en
Publication of JPS6491116A publication Critical patent/JPS6491116A/en
Pending legal-status Critical Current

Links

Landscapes

  • Liquid Crystal (AREA)

Abstract

PURPOSE:To improve the contrast on a screen by providing a polarizing plate with a good polarization degree at a position of a liquid crystal display element on the side of incidence from a light source and providing a polarizing plate with high transmissivity on the opposite side from the incidence side. CONSTITUTION:The light from the light source 1 is incident on the 1st polarizing plate 11 of the liquid crystal display plate 3, then transmitted through a substrate 9, the transmission type liquid crystal element 8, a substrate 10, and a 2nd polarizing plate 12 in order, and reflected by a Fresnel reflecting plate 4. Then its reflected light is transmitted through the 2nd polarizing plate 12, substrate 10, transmission type liquid crystal display element 8, substrate 9, and 1st polarizing plate 11 in order and projected from the liquid crystal display plate 3. Here, a 1st polarizing plate 11 in use has the extremely good polarizing degree and the 2nd polarizing plate 12 has the high transmissivity, so the polarization degree and transmissivity of the polarizing plates are improved and optimized. Consequently, the contrast of characters and patterns displayed on the screen to the background color is improved and a sharp projection image is obtained.
JP62249156A 1987-10-02 1987-10-02 Enlargement projection device Pending JPS6491116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62249156A JPS6491116A (en) 1987-10-02 1987-10-02 Enlargement projection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62249156A JPS6491116A (en) 1987-10-02 1987-10-02 Enlargement projection device

Publications (1)

Publication Number Publication Date
JPS6491116A true JPS6491116A (en) 1989-04-10

Family

ID=17188738

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62249156A Pending JPS6491116A (en) 1987-10-02 1987-10-02 Enlargement projection device

Country Status (1)

Country Link
JP (1) JPS6491116A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5231433A (en) * 1990-01-19 1993-07-27 Asahi Kogaku Kogyo Kabushiki Kaisha Reflecting illumination projecting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5231433A (en) * 1990-01-19 1993-07-27 Asahi Kogaku Kogyo Kabushiki Kaisha Reflecting illumination projecting device
US5381197A (en) * 1990-01-19 1995-01-10 Asahi Kogaku Kogyo Kabushiki Kaisha Reflecting illumination projecting device

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