JPS6113664B2 - - Google Patents
Info
- Publication number
- JPS6113664B2 JPS6113664B2 JP52116609A JP11660977A JPS6113664B2 JP S6113664 B2 JPS6113664 B2 JP S6113664B2 JP 52116609 A JP52116609 A JP 52116609A JP 11660977 A JP11660977 A JP 11660977A JP S6113664 B2 JPS6113664 B2 JP S6113664B2
- Authority
- JP
- Japan
- Prior art keywords
- beam current
- power source
- detection resistor
- value
- power supply
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 8
- 230000009977 dual effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Television Receiver Circuits (AREA)
Description
【発明の詳細な説明】
本発明は交直両用テレビジヨン受信機を、電池
などの直流電源によつて使用する場合に、交流電
源によつて使用する時よりも消費電力が少なくな
るようにしたテレビジヨン受信機に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a television receiver that consumes less power when used with a DC power source such as a battery than when used with an AC power source. Regarding Jiyoung receiver.
交直両用テレビジヨン受信機は通常交流電源と
しては100V、220V等の商用交流電源を用い、直
流電源としては12V、24V等の電池を用いる。し
たがつて交流電源使用動作時と直流電源使用動作
時とにおいて、テレビジヨン受信回路の消費電力
量が等しければ、電源回路の一部には、直流使用
時には交流使用時の10倍近い大電流が流れて該回
路の電線や接触器などの抵抗による電力損失ある
いはそれに伴う事故増加の確率が無視できないも
のとなり、更に直流使用時には電源である電池の
電圧が使用に伴つて低下して比較的短時間で使用
不能となることもあるなどの問題があつた。しか
しこの問題に対する従来の交直両用テレビジヨン
受信機の対策は十分ではなかつた。例えば、従
来、上記問題の対策として、受像管のカソードバ
イアス（カソード電位）を、商用交流電源にAC
アダプタを接続して用いる場合には、電池を電源
として用いる場合よりも、低くする提案（実公昭
49−14259号）もあつたが、カソードバイアス変
更によりビーム電流を増加させようとしても、受
像管のビーム電流自体が所定値を越えないように
設定する後述のABL回路を備えたテレビジヨン
受信機では、ABL機能を固定したままでは、カ
ソードバイアスの切換えによつて輝度の上昇が得
られない場合が生ずるという問題があつた。 Dual AC/DC television receivers usually use a commercial AC power source such as 100V or 220V as the AC power source, and a battery such as 12V or 24V as the DC power source. Therefore, if the power consumption of the television receiving circuit is the same when operating with an AC power supply and when operating with a DC power supply, a part of the power supply circuit will draw nearly 10 times as much current when using DC as when using AC. The probability of power loss due to the resistance of electric wires and contactors in the circuit and an increase in accidents due to this cannot be ignored, and furthermore, when DC is used, the voltage of the battery that is the power source decreases with use, resulting in a relatively short period of time. There were some problems, such as it sometimes becoming unusable. However, the measures taken by conventional dual-purpose television receivers to deal with this problem have not been sufficient. For example, conventionally, as a countermeasure to the above problem, the cathode bias (cathode potential) of the picture tube was
A proposal (Jikkosho
49-14259), but even if an attempt is made to increase the beam current by changing the cathode bias, the television receiver is equipped with an ABL circuit (described later) that sets the beam current of the picture tube so that it does not exceed a predetermined value. However, there was a problem in that if the ABL function was kept fixed, brightness could not be increased by switching the cathode bias.
本発明は前記従来の交直両用テレビジヨン受信
機の直流電源使用時の問題点を改善した交直両用
テレビジヨン受信機を提供することを目的とす
る。 SUMMARY OF THE INVENTION An object of the present invention is to provide an AC/DC dual purpose television receiver which improves the problems of the conventional AC/DC dual purpose television receiver when using a DC power source.
上記目的を達成するために本発明においては、
直流動作時には多少画面が暗くても長時間問題な
く受信できるように受像管のビーム電流値を低減
して消費電力量を低下させ、他方電源容量に関し
て特別に考慮する必要のない交流動作時には十分
明るい画面を見られるようにした。 In order to achieve the above object, in the present invention,
During DC operation, the beam current value of the picture tube is reduced so that the screen can be received for a long time without problems even if the screen is somewhat dark, reducing power consumption.On the other hand, during AC operation, when there is no need to take special consideration regarding power supply capacity, it is sufficiently bright. I was able to see the screen.
第１図は本発明の一実施例図である。図におい
て、１は交流電源、２は直流電源（蓄電池等）、
３は交流用プラグ、４は直流用プラグ、５は切換
ソケツト、６は電源スイツチ、７は切替リレー、
８は整流回路、９は電圧安定化回路で９Ａは交流
整流電源用９Ｂは直流電源用、１０は受像管ビー
ム電流切替抵抗（ABL切替抵抗）、１１は受像管
ビーム電流設定抵抗（ABL設定抵抗）、１２はコ
ンデンサ、１３は抵抗、１４はダイオード、１５
は受像管、１６はフライバツク変圧器、１７は高
圧整流ダイオード、１８は安定化直流出力電圧で
ある。いまビーム電流検出抵抗（直流動作時の抵
抗１１ありいは交流動作時の抵抗１０，１１の並
列合成抵抗）の値をR1、この検出抵抗に流れる
ビーム電流をI0、安定化直流出力電圧１８の値を
V0とすると、R1I0≧V0となるビーム電流のとき
ダイオード１４は導通する（ただし順方電圧等は
無視）。フライバツク変圧器１６とビーム電流検
出抵抗との接続点の電圧は、ビーム電流が増大す
るほど低下するので、ビーム電流がI0以上のとき
は、ビーム電流が増大するほど受像管１５の第１
グリード電圧も低下し、このためビーム電流の最
大値はI0に制限される。 FIG. 1 is a diagram showing an embodiment of the present invention. In the figure, 1 is an AC power supply, 2 is a DC power supply (storage battery, etc.),
3 is an AC plug, 4 is a DC plug, 5 is a switching socket, 6 is a power switch, 7 is a switching relay,
8 is a rectifier circuit, 9 is a voltage stabilization circuit, 9A is for AC rectification power supply, 9B is for DC power supply, 10 is picture tube beam current switching resistor (ABL switching resistor), 11 is picture tube beam current setting resistor (ABL setting resistor). ), 12 is a capacitor, 13 is a resistor, 14 is a diode, 15
1 is a picture tube, 16 is a flyback transformer, 17 is a high voltage rectifier diode, and 18 is a stabilized DC output voltage. Now, the value of the beam current detection resistor (resistance 11 during DC operation or parallel combined resistance of resistors 10 and 11 during AC operation) is R 1 , the beam current flowing through this detection resistor is I 0 , and the stabilized DC output voltage 18 value
Assuming V 0 , the diode 14 becomes conductive when the beam current satisfies R 1 I 0 ≧V 0 (however, forward voltage etc. are ignored). The voltage at the connection point between the flyback transformer 16 and the beam current detection resistor decreases as the beam current increases .
The lead voltage is also reduced, which limits the maximum value of the beam current to I 0 .
したがつてビーム電流はＩ＝V0／R1によつ
て、すなわちビーム電流検出抵抗の値R1によつ
て決定されることになる。前述の様に、このビー
ム電流I0の値は、容量に限られた電池などの直流
電源を使用する場合を考えて、実用上差支えない
範囲内で比較的低目に設定して消費電力が少なく
なるようにする。また交流電源１使用時には、リ
レー７のコイルは励磁されず、該リレーによつて
ABL切替抵抗１０がABL設定抵抗１１に並列に
接続される。その結果受像管のビーム電流は直流
電源使用時の値より大きな値をとるが、交流電源
使用時には一般に電力消費量が多少増加しても問
題は生じないから、交流電源使用時の受像管のビ
ーム電流値は、十分明るい画面が得られるように
選定することができる。 Therefore, the beam current is determined by I=V 0 /R 1 , that is, by the value R 1 of the beam current detection resistor. As mentioned above, the value of this beam current I 0 is set to a relatively low value within a practical range to reduce power consumption, considering the case where a DC power source such as a battery with limited capacity is used. Make it less. In addition, when AC power supply 1 is used, the coil of relay 7 is not excited, and the relay
An ABL switching resistor 10 is connected in parallel to an ABL setting resistor 11. As a result, the beam current of the picture tube takes a larger value than when using a DC power supply, but when using an AC power supply, there is generally no problem even if the power consumption increases slightly, so the beam current of the picture tube when using an AC power supply is The current value can be selected to provide a sufficiently bright screen.
以上説明したように本発明によれば、交流電源
使用時には十分明るい画面にしてテレビジヨン受
信機の機能を最良の状態において使用でき、他方
一般に低電圧で容量の限られた直流電源使用時に
は、再生画像の最大輝度が抑えられるため多少暗
くなるが、他の動作条件は全く変化させずに、前
記直流電源使用に伴う問題に従来の様になやまさ
れなくてすむという効果が得られる。 As explained above, according to the present invention, when an AC power source is used, the screen is sufficiently bright and the functions of the television receiver can be used in the best condition.On the other hand, when a DC power source, which is generally low voltage and has a limited capacity, is used, it is possible to Since the maximum brightness of the image is suppressed, the image becomes somewhat darker, but other operating conditions do not change at all, and the effect of not having to suffer from the problems associated with the use of a DC power source as in the past can be achieved.
なお第１図に示した実施例における切替リレー
７は電磁形であつたが、勿論その代りに半導体の
切替スイツチを使用することもできる。 Although the switching relay 7 in the embodiment shown in FIG. 1 is of an electromagnetic type, it is of course possible to use a semiconductor switching switch instead.
第１図は本発明の一実施例図である。
１……交流電源、２……直流電源、７……切替
リレー、９……電圧安定化回路、１０……ABL
切替抵抗、１１……ABL設定抵抗、１５……受
像管、１６……フライバツク変圧器、１８……安
定化直流出力電圧。
FIG. 1 is a diagram showing an embodiment of the present invention. 1...AC power supply, 2...DC power supply, 7...Switching relay, 9...Voltage stabilization circuit, 10...ABL
Switching resistor, 11... ABL setting resistor, 15... Picture tube, 16... Flyback transformer, 18... Stabilized DC output voltage.
Claims (1)
た検出抵抗と、この検出抵抗に発生する電圧が所
定値以上になつたときはビーム電流を減少させて
ビーム電流が所定の電流値を越えないように制御
する制御手段とを備えたテレビジヨン受信機にお
いて、上記検出抵抗の抵抗値を商用交流電源動作
時には小さく、直流電源動作時には大きくなるよ
うに、動作電源に応じて切り換える切換手段を設
けたことを特徴とするテレビジヨン受信機。1 A detection resistor is installed in the current path through which the beam current of the picture tube flows, and when the voltage generated in this detection resistor exceeds a predetermined value, the beam current is reduced so that the beam current does not exceed the predetermined current value. The television receiver is equipped with a switching means for switching the resistance value of the detection resistor according to the operating power source so that the resistance value of the detection resistor is small when operating on a commercial AC power source and becomes large when operating on a DC power source. A television receiver characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11660977A JPS5451322A (en) | 1977-09-30 | 1977-09-30 | Television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11660977A JPS5451322A (en) | 1977-09-30 | 1977-09-30 | Television receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5451322A JPS5451322A (en) | 1979-04-23 |
| JPS6113664B2 true JPS6113664B2 (en) | 1986-04-15 |
Family
ID=14691395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11660977A Granted JPS5451322A (en) | 1977-09-30 | 1977-09-30 | Television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5451322A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5652368U (en) * | 1979-09-27 | 1981-05-08 | ||
| JPS5930379A (en) * | 1982-08-11 | 1984-02-17 | Mitsubishi Electric Corp | Beam current limiting device |
| JPS6037977U (en) * | 1983-08-22 | 1985-03-15 | 株式会社東芝 | Image display device control circuit |
-
1977
- 1977-09-30 JP JP11660977A patent/JPS5451322A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5451322A (en) | 1979-04-23 |
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