JPS5518746A - Three-dimensional brightness control circuit of display unit - Google Patents

Three-dimensional brightness control circuit of display unit

Info

Publication number
JPS5518746A
JPS5518746A JP9083278A JP9083278A JPS5518746A JP S5518746 A JPS5518746 A JP S5518746A JP 9083278 A JP9083278 A JP 9083278A JP 9083278 A JP9083278 A JP 9083278A JP S5518746 A JPS5518746 A JP S5518746A
Authority
JP
Japan
Prior art keywords
counter
output
value
coordinate
register
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
JP9083278A
Other languages
Japanese (ja)
Inventor
Tsuneo Ikedo
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP9083278A priority Critical patent/JPS5518746A/en
Publication of JPS5518746A publication Critical patent/JPS5518746A/en
Pending legal-status Critical Current

Links

Landscapes

  • Digital Computer Display Output (AREA)
  • Image Generation (AREA)

Abstract

PURPOSE: To make it possible to give a perspective and stereo-graphic impression by freely adjusting a luminance signal, by providing a variation signal generating circuit which generates its output when the Z coordinate value among three dimensional coordinates X, Y and Z is changed.
CONSTITUTION: The DDA circuit 1 processes sequentially coordinate data Ze on a straight line linking the initial and terminal points of Z coordinate values and then outputs results, and higher (n) bits of it are set to counter 4. At every time when the Z coordinate value to be outputted changes by a value set to register 7 according to the arithmetic progress of circuit 1, counter 4 counts up or down depending upon the output of the variation signal generating circuit composed of counter 5, comparator 6 and register 7. Addressing to memory 8 where brightness data are stored is attained by the output of counter 4 to read brightness data equivalent to the output value of counter 4 and adder 9 adds adequately-set offset value ZO to the output value ZS, thereby outputting a luminance signal of ZS±ZO. Consequently, CRT display giving a stereographic impression can be realized by inexpensive- element constitution.
COPYRIGHT: (C)1980,JPO&Japio
JP9083278A 1978-07-25 1978-07-25 Three-dimensional brightness control circuit of display unit Pending JPS5518746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9083278A JPS5518746A (en) 1978-07-25 1978-07-25 Three-dimensional brightness control circuit of display unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9083278A JPS5518746A (en) 1978-07-25 1978-07-25 Three-dimensional brightness control circuit of display unit

Publications (1)

Publication Number Publication Date
JPS5518746A true JPS5518746A (en) 1980-02-09

Family

ID=14009553

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9083278A Pending JPS5518746A (en) 1978-07-25 1978-07-25 Three-dimensional brightness control circuit of display unit

Country Status (1)

Country Link
JP (1) JPS5518746A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6210780A (en) * 1985-07-08 1987-01-19 Mitsubishi Electric Corp drawing device
JPS62222379A (en) * 1986-03-25 1987-09-30 Mutoh Ind Ltd Method and device for processing hidden line and hidden surface in computer graphics

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6210780A (en) * 1985-07-08 1987-01-19 Mitsubishi Electric Corp drawing device
JPS62222379A (en) * 1986-03-25 1987-09-30 Mutoh Ind Ltd Method and device for processing hidden line and hidden surface in computer graphics

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