JPH0449336U - - Google Patents
Info
- Publication number
- JPH0449336U JPH0449336U JP6815190U JP6815190U JPH0449336U JP H0449336 U JPH0449336 U JP H0449336U JP 6815190 U JP6815190 U JP 6815190U JP 6815190 U JP6815190 U JP 6815190U JP H0449336 U JPH0449336 U JP H0449336U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- current
- conversion circuit
- addition type
- contrast
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Television Receiver Circuits (AREA)
Description
第１図は、本考案の一実施例を示す回路図、第
２図及び第３図は従来の輝度調整回路を示す回路
図である。
４……コントラスト調整回路、１１……Ｄ／Ａ
変換回路、１２……ＡＢＬ回路。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIGS. 2 and 3 are circuit diagrams showing conventional brightness adjustment circuits. 4...Contrast adjustment circuit, 11...D/A
Conversion circuit, 12...ABL circuit.
Claims (1)
タル信号をアナログ信号に変換する電流加算型Ｄ
／Ａ変換回路と、 ブラウン管のビーム電流と基準値とを比較し、
その差が所定値以上になると前記電流加算型Ｄ／
Ａ変換回路の出力電流を直接制御するＡＢＬ回路
と、 前記Ｄ／Ａ変換回路の出力電流に応じて制御さ
れるコントラスト調整回路と から成ることを特徴とする輝度調整回路。[Claims for Utility Model Registration] Current addition type D that converts digital signals to analog signals to adjust the contrast of a television screen
/A conversion circuit, compare the beam current of the cathode ray tube with the reference value,
When the difference exceeds a predetermined value, the current addition type D/
A brightness adjustment circuit comprising: an ABL circuit that directly controls the output current of the A conversion circuit; and a contrast adjustment circuit that is controlled according to the output current of the D/A conversion circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6815190U JP2505814Y2 (en) | 1990-06-27 | 1990-06-27 | Brightness adjustment circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6815190U JP2505814Y2 (en) | 1990-06-27 | 1990-06-27 | Brightness adjustment circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0449336U true JPH0449336U (en) | 1992-04-27 |
| JP2505814Y2 JP2505814Y2 (en) | 1996-08-07 |
Family
ID=31800788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6815190U Expired - Lifetime JP2505814Y2 (en) | 1990-06-27 | 1990-06-27 | Brightness adjustment circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2505814Y2 (en) |
-
1990
- 1990-06-27 JP JP6815190U patent/JP2505814Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2505814Y2 (en) | 1996-08-07 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |