JPS5491354A - Coordinate position detector - Google Patents

Coordinate position detector

Info

Publication number
JPS5491354A
JPS5491354A JP15983177A JP15983177A JPS5491354A JP S5491354 A JPS5491354 A JP S5491354A JP 15983177 A JP15983177 A JP 15983177A JP 15983177 A JP15983177 A JP 15983177A JP S5491354 A JPS5491354 A JP S5491354A
Authority
JP
Japan
Prior art keywords
bridge circuit
plate
coordinate
resistors
coordinate input
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
JP15983177A
Other languages
Japanese (ja)
Inventor
Tadatami Mori
Kazuhiro Takahara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15983177A priority Critical patent/JPS5491354A/en
Publication of JPS5491354A publication Critical patent/JPS5491354A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

PURPOSE: To simplify the construction of a resistor, which is mounted on a coordinate input plate, by constituting the two sides of a bridge circuit with the use of paired resistors between electrodes so that the output voltage of the bridge circuit is reduced to zero.
CONSTITUTION: A coordinate input plate 30 has its glass substrate SUB covered wholy with a transparent resistive film R of tin oxide or indium oxide, which is further covered with an insulating layer 1F of glass having a low melting point. The coordinate input plate 30 thus prepared is placed on a coordinate plate P such as a table of Chinese letters and is set in such a relative position as can be observed from the above. At the two terminals Tx, fixed and variable resistors RC and Ru having their one terminals connected are connected through change-over switches S1 and S2, thereby to constitute the two sides of a bridge circuit with the resistors between respective terminals. A detecting pen is brought into abutment against a preset coordinate position of the plate 30 so that the AC signals from an oscillator are fed to the bridge circuit through the electrostatic capacity between the pen and the film R.
COPYRIGHT: (C)1979,JPO&Japio
JP15983177A 1977-12-28 1977-12-28 Coordinate position detector Pending JPS5491354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15983177A JPS5491354A (en) 1977-12-28 1977-12-28 Coordinate position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15983177A JPS5491354A (en) 1977-12-28 1977-12-28 Coordinate position detector

Publications (1)

Publication Number Publication Date
JPS5491354A true JPS5491354A (en) 1979-07-19

Family

ID=15702193

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15983177A Pending JPS5491354A (en) 1977-12-28 1977-12-28 Coordinate position detector

Country Status (1)

Country Link
JP (1) JPS5491354A (en)

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