JPS5477025A - Liquid crystal display unit - Google Patents

Liquid crystal display unit

Info

Publication number
JPS5477025A
JPS5477025A JP14387777A JP14387777A JPS5477025A JP S5477025 A JPS5477025 A JP S5477025A JP 14387777 A JP14387777 A JP 14387777A JP 14387777 A JP14387777 A JP 14387777A JP S5477025 A JPS5477025 A JP S5477025A
Authority
JP
Japan
Prior art keywords
liquid crystal
crystal display
display unit
polarizing plate
light
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
JP14387777A
Other languages
Japanese (ja)
Inventor
Makoto Morijiri
Mitsuru Ura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14387777A priority Critical patent/JPS5477025A/en
Publication of JPS5477025A publication Critical patent/JPS5477025A/en
Pending legal-status Critical Current

Links

Landscapes

  • Position Input By Displaying (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

PURPOSE: To obtain a liquid crystal display unit, to which information can be inputted by pointing out on the panel surface of it with a pen, by combining a photo detector with the liquid-crystal display element.
CONSTITUTION: In case of using the TN liquid crystal display unit of a reflection type, polarizing plate 1, TN liquid crystal cell 2, polarizing plate 3, and reflex mirror 4 are stacked in a sandwich shape, and photo selector 7 is arranged under reflex mirror 4. Reflex mirror 4 is made semitransparent, or a small hole is provided to light path 6 from light pen 5. By providing a small hole or a part where polarization is not caused to light path 6 at one polarizing plate, light from light pen 5 can be allowed to pass through even when the display on the liquid crystal is in process. On the transparent TN liquid crystal display unit, a display light source is replaced as a substitute for reflex mirror 4 and photo detector 7 is provided between the corresponding light source and polarizing plate 3, thereby obtaining the same constitution as the reflection type one.
COPYRIGHT: (C)1979,JPO&Japio
JP14387777A 1977-12-02 1977-12-02 Liquid crystal display unit Pending JPS5477025A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14387777A JPS5477025A (en) 1977-12-02 1977-12-02 Liquid crystal display unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14387777A JPS5477025A (en) 1977-12-02 1977-12-02 Liquid crystal display unit

Publications (1)

Publication Number Publication Date
JPS5477025A true JPS5477025A (en) 1979-06-20

Family

ID=15349078

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14387777A Pending JPS5477025A (en) 1977-12-02 1977-12-02 Liquid crystal display unit

Country Status (1)

Country Link
JP (1) JPS5477025A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57127240A (en) * 1981-01-30 1982-08-07 Olympus Optical Co Ltd Input and display device
JPS5862682A (en) * 1981-10-09 1983-04-14 株式会社日立製作所 Liquid crystal display
JPS59185380A (en) * 1983-04-07 1984-10-20 セイコーエプソン株式会社 Optically inputtable active panel
JPS59185381A (en) * 1983-04-07 1984-10-20 セイコーエプソン株式会社 Optically inputtable memory type active panel
JPS59187847U (en) * 1983-05-31 1984-12-13 日本電気ホームエレクトロニクス株式会社 Image input/output device
JPS59223055A (en) * 1983-05-31 1984-12-14 Nec Home Electronics Ltd Picture transmitting and receiving system
JPS6019358A (en) * 1983-07-14 1985-01-31 Iwatsu Electric Co Ltd Picture overlay printer
JPS6093546A (en) * 1983-10-26 1985-05-25 Sharp Corp Handwriting input device
JPS60225226A (en) * 1984-04-24 1985-11-09 Canon Inc Electronic appliance
JPS60233727A (en) * 1984-05-07 1985-11-20 Canon Inc Display input device
JPS618342U (en) * 1984-06-18 1986-01-18 株式会社小松製作所 Information input/output device
JPS6395528A (en) * 1986-10-13 1988-04-26 Software Sosaetei:Kk Sheet type input and display method and device therefor

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57127240A (en) * 1981-01-30 1982-08-07 Olympus Optical Co Ltd Input and display device
JPS5862682A (en) * 1981-10-09 1983-04-14 株式会社日立製作所 Liquid crystal display
JPH0546553B2 (en) * 1983-04-07 1993-07-14 Seiko Epson Corp
JPS59185380A (en) * 1983-04-07 1984-10-20 セイコーエプソン株式会社 Optically inputtable active panel
JPS59185381A (en) * 1983-04-07 1984-10-20 セイコーエプソン株式会社 Optically inputtable memory type active panel
JPS59187847U (en) * 1983-05-31 1984-12-13 日本電気ホームエレクトロニクス株式会社 Image input/output device
JPS59223055A (en) * 1983-05-31 1984-12-14 Nec Home Electronics Ltd Picture transmitting and receiving system
JPS6019358A (en) * 1983-07-14 1985-01-31 Iwatsu Electric Co Ltd Picture overlay printer
JPS6093546A (en) * 1983-10-26 1985-05-25 Sharp Corp Handwriting input device
JPS60225226A (en) * 1984-04-24 1985-11-09 Canon Inc Electronic appliance
JPS60233727A (en) * 1984-05-07 1985-11-20 Canon Inc Display input device
JPS618342U (en) * 1984-06-18 1986-01-18 株式会社小松製作所 Information input/output device
JPS6395528A (en) * 1986-10-13 1988-04-26 Software Sosaetei:Kk Sheet type input and display method and device therefor

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