JPS6425279U - - Google Patents
Info
- Publication number
- JPS6425279U JPS6425279U JP11171487U JP11171487U JPS6425279U JP S6425279 U JPS6425279 U JP S6425279U JP 11171487 U JP11171487 U JP 11171487U JP 11171487 U JP11171487 U JP 11171487U JP S6425279 U JPS6425279 U JP S6425279U
- Authority
- JP
- Japan
- Prior art keywords
- power
- white balance
- clock generation
- signal
- detection means
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims 2
- 230000010355 oscillation Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Color Television Image Signal Generators (AREA)
- Processing Of Color Television Signals (AREA)
Description
第１図は本考案の一実施例である自動ホワイト
バランス調整回路２１の電気的構成を示すブロツ
ク図、第２図は電源投入時における各部の電圧レ
ベルの変化を示す波形図、第３図は従来技術の自
動ホワイトバランス調整回路１の電気的構成を示
すブロツク図である。
２１……自動ホワイトバランス調整回路、２４
，２５……積分回路、２６，２７，４２……コン
パレータ、３０……カウンタ駆動回路、３３，３
４……カウンタ、３５，３６……Ｄ／Ａ変換器、
４０……分周器。
FIG. 1 is a block diagram showing the electrical configuration of an automatic white balance adjustment circuit 21 which is an embodiment of the present invention, FIG. 2 is a waveform diagram showing changes in voltage levels of various parts when the power is turned on, and FIG. 1 is a block diagram showing the electrical configuration of a conventional automatic white balance adjustment circuit 1. FIG. 21... Automatic white balance adjustment circuit, 24
, 25...Integrator circuit, 26, 27, 42...Comparator, 30...Counter drive circuit, 33, 3
4... Counter, 35, 36... D/A converter,
40... Frequency divider.
Claims (1)
、 前記電源投入検出手段の出力に応じて、発振周
波数が変化するクロツク発生手段と、 前記クロツク発生手段からのクロツク信号に対
応する動作速度でホワイトバランス制御信号を発
生する信号発生手段とを含むことを特徴とする自
動ホワイトバランス調整回路。[Claims for Utility Model Registration] Power-on detection means for detecting a power-on state; clock generation means whose oscillation frequency changes according to the output of the power-on detection means; and a clock signal from the clock generation means. and signal generating means for generating a white balance control signal at an operating speed corresponding to the automatic white balance adjustment circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987111714U JPH0715249Y2 (en) | 1987-07-20 | 1987-07-20 | Automatic white balance adjustment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987111714U JPH0715249Y2 (en) | 1987-07-20 | 1987-07-20 | Automatic white balance adjustment circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6425279U true JPS6425279U (en) | 1989-02-13 |
| JPH0715249Y2 JPH0715249Y2 (en) | 1995-04-10 |
Family
ID=31350007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987111714U Expired - Lifetime JPH0715249Y2 (en) | 1987-07-20 | 1987-07-20 | Automatic white balance adjustment circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0715249Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57200990U (en) * | 1981-06-16 | 1982-12-21 | ||
| JPS60124190A (en) * | 1983-12-08 | 1985-07-03 | Seiko Epson Corp | Video camera |
-
1987
- 1987-07-20 JP JP1987111714U patent/JPH0715249Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57200990U (en) * | 1981-06-16 | 1982-12-21 | ||
| JPS60124190A (en) * | 1983-12-08 | 1985-07-03 | Seiko Epson Corp | Video camera |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0715249Y2 (en) | 1995-04-10 |
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