JPS5581309A - Input device - Google Patents

Input device

Info

Publication number
JPS5581309A
JPS5581309A JP15590578A JP15590578A JPS5581309A JP S5581309 A JPS5581309 A JP S5581309A JP 15590578 A JP15590578 A JP 15590578A JP 15590578 A JP15590578 A JP 15590578A JP S5581309 A JPS5581309 A JP S5581309A
Authority
JP
Japan
Prior art keywords
optical guide
light emitting
input device
photo
disposed
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
JP15590578A
Other languages
Japanese (ja)
Inventor
Tsuneo Hirose
Shinichi Tanaka
Kazuji Kobayashi
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15590578A priority Critical patent/JPS5581309A/en
Publication of JPS5581309A publication Critical patent/JPS5581309A/en
Pending legal-status Critical Current

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  • Optical Integrated Circuits (AREA)

Abstract

PURPOSE:To reduce wirings by disposing a light emitting part and a photo detecting part at both ends of an optical guide partly provided with an external control part. CONSTITUTION:A light emitting device 4 consisting of a light emitting diode, tungsten electric bulb, etc. is disposed to one end side of an optical guide 2 which is disposed to an input device panel 1, is converted with covering material 3 of a refractive index smaller than that of the optical guide 2 material and is removed of part of the convering material 3 to provided an external control part 6. A photo detector 5 consisting of a photo diode, photo transistor, photovoltaic element, etc. is disposed to its other end. With this arrangement, the light inputted to one end of the optical guide 2 from the light emitting device 4 is guided in the optical guide 2 and is received by the photo detector 5. When dielectric material is pressed on the optical guide 2 through the external control part 6, the total reflection of the optical guide 2 is controlled from the outside. Hence, the wirings in the input device and from the input device to the other portions may be made extremely less.
JP15590578A 1978-12-15 1978-12-15 Input device Pending JPS5581309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15590578A JPS5581309A (en) 1978-12-15 1978-12-15 Input device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15590578A JPS5581309A (en) 1978-12-15 1978-12-15 Input device

Publications (1)

Publication Number Publication Date
JPS5581309A true JPS5581309A (en) 1980-06-19

Family

ID=15616069

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15590578A Pending JPS5581309A (en) 1978-12-15 1978-12-15 Input device

Country Status (1)

Country Link
JP (1) JPS5581309A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50137754A (en) * 1974-04-20 1975-11-01
JPS5328742B2 (en) * 1975-12-27 1978-08-16
JPS53139551A (en) * 1977-05-11 1978-12-05 Mitsubishi Electric Corp Photo switching board

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50137754A (en) * 1974-04-20 1975-11-01
JPS5328742B2 (en) * 1975-12-27 1978-08-16
JPS53139551A (en) * 1977-05-11 1978-12-05 Mitsubishi Electric Corp Photo switching board

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