JPS623428B2 - - Google Patents

Info

Publication number
JPS623428B2
JPS623428B2 JP10077979A JP10077979A JPS623428B2 JP S623428 B2 JPS623428 B2 JP S623428B2 JP 10077979 A JP10077979 A JP 10077979A JP 10077979 A JP10077979 A JP 10077979A JP S623428 B2 JPS623428 B2 JP S623428B2
Authority
JP
Japan
Prior art keywords
data
refresh memory
color
transferred
blue
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.)
Expired
Application number
JP10077979A
Other languages
Japanese (ja)
Other versions
JPS5625786A (en
Inventor
Tadatoshi Namikawa
Shinichiro Oohora
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.)
Toshiba Corp
Original Assignee
Tokyo Shibaura Electric 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 Tokyo Shibaura Electric Co Ltd filed Critical Tokyo Shibaura Electric Co Ltd
Priority to JP10077979A priority Critical patent/JPS5625786A/en
Publication of JPS5625786A publication Critical patent/JPS5625786A/en
Publication of JPS623428B2 publication Critical patent/JPS623428B2/ja
Granted legal-status Critical Current

Links

Description

【発明の詳細な説明】 この発明はカラー図形表示装置の表示方式に関
する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display system for a color graphic display device.

従来のデイジタル式カラー図形表示装置におい
ては(赤、緑、青)の3原色に対応するラスター
スキヤン用リフレツシユメモリーを有し、計算機
から転送される3色データをそのまま当該リフレ
ツシユメモリーに転送する方式がとられていた。
Conventional digital color graphics display devices have a raster scan refresh memory that corresponds to the three primary colors (red, green, and blue), and the three-color data transferred from the computer is directly transferred to the refresh memory. A method was adopted.

一例として画面の一点に対応するリフレツシユ
メモリー部分の(赤、緑、青)のデータが(0、
1、1)の場合、計算機から新しいデータ(0、
0、0)を転送すると、当該リフレツシユメモリ
ー部分は無条件に(0、0、0)に置き変つてし
まう。通常、文字や図形のパターン情報は長方形
のマトリツクスとして表わされるので、上記の従
来方式によると、第1図に例示されるように、リ
フレツシユメモリーに記憶された文字Aの上に同
一色のパターンXを新たに転送すると、1で表わ
されるXの図形部分のみならず、周囲の0の部分
もそのまま転送されるので元の文字Aは消されて
しまう。すなわち文字や図形の重ね描きができな
い。このため重ね描きを行なう場合にはプログラ
ムによる複雑な制御が必要となる。
As an example, the data of (red, green, blue) in the refresh memory part corresponding to one point on the screen is (0,
1, 1), the computer will send new data (0, 1).
0, 0), the refresh memory portion will be unconditionally replaced with (0, 0, 0). Normally, pattern information for characters and figures is represented as a rectangular matrix, so according to the conventional method described above, as illustrated in FIG. When X is newly transferred, not only the graphic part of X represented by 1 but also the surrounding 0 parts are transferred as is, so the original character A is erased. In other words, characters and figures cannot be overwritten. For this reason, when overwriting is performed, complicated control by a program is required.

この発明の目的は、文字や図形の重ね描きが容
易なカラー図形表示装置を提供する事にある。
An object of the present invention is to provide a color graphic display device in which characters and graphics can be easily overwritten.

第2図は本発明の一実施例を示す回路図であ
る。本実施例では、TV1の画面の1点に対して
(赤、緑、青)3ビツトのリフレツシユメモリー
2,3,4が対応し、各点毎に番地付けが行なわ
れている。図示しない計算機から転送された3ビ
ツトのデータXR,XG,XBが線9,10,11
へ送られるが、XR=XG=XB=0の場合はゲー
ト7が閉じられリフレツシユメモリー2,3,4
への書き込みが行なわれない。XR,XG,XB
いずれかひとつでも1の場合にはゲート7が開
き、XR,XG,XBがリフレツシユメモリー2,
3,4に転送される。なお、線5には書込み番地
が、線6には書込み制御信号が供給される。
FIG. 2 is a circuit diagram showing one embodiment of the present invention. In this embodiment, 3-bit (red, green, blue) refresh memories 2, 3, and 4 correspond to one point on the screen of the TV 1, and each point is assigned an address. The 3-bit data X R , X G , and X B transferred from a computer (not shown) are on lines 9, 10, and 11.
However, if X R = X G = X B = 0, gate 7 is closed and refresh memories 2, 3, and 4 are
No writing is done. If any one of X R , X G , and X B is 1 , the gate 7 opens, and X R , X G , and
Transferred to 3 and 4. Note that the line 5 is supplied with a write address, and the line 6 is supplied with a write control signal.

この発明の効果として、文字や図形の重ね描き
が非常に容易になる。従来、重ね描きにはプログ
ラムによる複雑な処理が必要であつたが本発明に
より、プログラムが簡単となり表示速度も速くな
る。この結果、計算機によるアニメーシヨンにも
利用できる。
As an effect of this invention, it becomes very easy to overwrite characters and figures. Conventionally, overwriting required complicated processing by a program, but the present invention simplifies the program and increases display speed. As a result, it can also be used for computer-generated animation.

第2図の実施例は、画面の一点に対して(赤、
緑、青)3ビツトのリフレツシユメモリーが対応
する例であるが、3原色の各色に濃淡をもたせた
3ビツト以上のメモリー構成の場合にも本発明が
利用できることは自明である。
In the embodiment of FIG. 2, for one point on the screen (red,
Although this example corresponds to a 3-bit refresh memory (green, blue), it is obvious that the present invention can also be applied to a memory configuration of 3 or more bits in which each of the three primary colors has shading.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は文字Aの上にパターンXを重ね描きす
る例を示す図、第2図はこの発明の実施例を示す
図である。 1……カラーテレビ、2……赤のリフレツシユ
メモリ、3……緑のリフレツシユメモリ、4……
青のリフレツシユメモリ、7……ANDゲート、
8……ORゲート。
FIG. 1 is a diagram showing an example in which a pattern X is superimposed on a letter A, and FIG. 2 is a diagram showing an embodiment of the present invention. 1...Color TV, 2...Red refresh memory, 3...Green refresh memory, 4...
Blue refresh memory, 7...AND gate,
8...OR gate.

Claims (1)

【特許請求の範囲】[Claims] 1 カラーブラウン管とリフレツシユメモリーか
らなるデイジタル式図形表示装置において、画面
の1点に対応する(赤、緑、青)3原色データX
R,XG,XBをリフレツシユメモリーへ転送する
場合、XR=XG=XB=0でない場合にのみデー
タXR,XG,XBを転送し、XR=XG=XB=0の
場合にはデータを転送しないか又はリフレツシユ
メモリー内の転送先のデータと同一のデータを再
転送する機能を有する事を特徴とするカラー図形
表示装置。
1. In a digital graphic display device consisting of a color cathode ray tube and refresh memory, three primary color data (red, green, blue) corresponding to one point on the screen
When transferring R , X G , and X B to the refresh memory, data X R , X G , and X B are transferred only when X R = A color graphic display device characterized by having a function of not transferring data or retransferring the same data as the destination data in a refresh memory when B = 0.
JP10077979A 1979-08-09 1979-08-09 Color figure display unit Granted JPS5625786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10077979A JPS5625786A (en) 1979-08-09 1979-08-09 Color figure display unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10077979A JPS5625786A (en) 1979-08-09 1979-08-09 Color figure display unit

Publications (2)

Publication Number Publication Date
JPS5625786A JPS5625786A (en) 1981-03-12
JPS623428B2 true JPS623428B2 (en) 1987-01-24

Family

ID=14282944

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10077979A Granted JPS5625786A (en) 1979-08-09 1979-08-09 Color figure display unit

Country Status (1)

Country Link
JP (1) JPS5625786A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06110919A (en) * 1992-09-24 1994-04-22 Sony Tektronix Corp Approximate straight line calculating method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06110919A (en) * 1992-09-24 1994-04-22 Sony Tektronix Corp Approximate straight line calculating method

Also Published As

Publication number Publication date
JPS5625786A (en) 1981-03-12

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