JPS6448983U - - Google Patents
Info
- Publication number
- JPS6448983U JPS6448983U JP1987143080U JP14308087U JPS6448983U JP S6448983 U JPS6448983 U JP S6448983U JP 1987143080 U JP1987143080 U JP 1987143080U JP 14308087 U JP14308087 U JP 14308087U JP S6448983 U JPS6448983 U JP S6448983U
- Authority
- JP
- Japan
- Prior art keywords
- voltage value
- black level
- temperature detection
- temperature
- detection voltage
- 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
Links
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 5
- 238000003384 imaging method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Color Television Image Signal Generators (AREA)
Description
第１図は本考案の一実施例を示すブロツク図、
第２図は補正電圧発生回路９の一例を示すブロツ
ク図である。
１：色分解光学系、５：温度検出器、８：映像
処理回路、９：補正電圧発生回路、Ｖｒｅｆ：基
準電圧、１６：電圧変換回路。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a block diagram showing an example of the correction voltage generating circuit 9. As shown in FIG. 1: color separation optical system, 5: temperature detector, 8: video processing circuit, 9: correction voltage generation circuit, Vref: reference voltage, 16: voltage conversion circuit.
Claims (1)
値を検出する手段と、該温度検出出力を電圧値に
変換し、かつ映像信号の黒レベルを調整した時点
の該温度検出電圧値を基準電圧値に一致させるオ
フセツト調整機能を有する電圧変換手段と、該温
度検出電圧値に基づき、対応する黒レベルの補正
電圧を発生し、かつ上記温度検出電圧値が上記基
準電圧値以下か以上によつて異なつた温度補正係
数が設定された黒レベルの補正電圧発生手段とを
有し、該発生する黒レベルの補正電圧により映像
信号の黒レベルの温度変動を補正することを特徴
とする黒レベルの温度補正回路。 In the imaging device, a means for detecting the absolute value of the temperature of the color separation optical system, converting the temperature detection output into a voltage value, and converting the temperature detection voltage value at the time when the black level of the video signal is adjusted as a reference voltage value. a voltage conversion means having an offset adjustment function to match the temperature detection voltage value, and generating a corresponding black level correction voltage based on the temperature detection voltage value, and varying depending on whether the temperature detection voltage value is less than or equal to the reference voltage value. and a black level correction voltage generating means having a temperature correction coefficient set therein, and corrects temperature fluctuations in the black level of a video signal using the generated black level correction voltage. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987143080U JPS6448983U (en) | 1987-09-21 | 1987-09-21 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987143080U JPS6448983U (en) | 1987-09-21 | 1987-09-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6448983U true JPS6448983U (en) | 1989-03-27 |
Family
ID=31409579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987143080U Pending JPS6448983U (en) | 1987-09-21 | 1987-09-21 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6448983U (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5099029A (en) * | 1973-12-28 | 1975-08-06 | ||
| JPS51105721A (en) * | 1975-03-14 | 1976-09-18 | Tokyo Shibaura Electric Co | |
| JPS5745780A (en) * | 1980-09-03 | 1982-03-15 | Hitachi Ltd | Solid-state image pickup device |
| JPS61142886A (en) * | 1984-12-15 | 1986-06-30 | Sharp Corp | Color television camera |
-
1987
- 1987-09-21 JP JP1987143080U patent/JPS6448983U/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5099029A (en) * | 1973-12-28 | 1975-08-06 | ||
| JPS51105721A (en) * | 1975-03-14 | 1976-09-18 | Tokyo Shibaura Electric Co | |
| JPS5745780A (en) * | 1980-09-03 | 1982-03-15 | Hitachi Ltd | Solid-state image pickup device |
| JPS61142886A (en) * | 1984-12-15 | 1986-06-30 | Sharp Corp | Color television camera |
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