JPH0648198U - DC-AC inverter power supply for lighting cathode tubes - Google Patents
DC-AC inverter power supply for lighting cathode tubesInfo
- Publication number
- JPH0648198U JPH0648198U JP8407192U JP8407192U JPH0648198U JP H0648198 U JPH0648198 U JP H0648198U JP 8407192 U JP8407192 U JP 8407192U JP 8407192 U JP8407192 U JP 8407192U JP H0648198 U JPH0648198 U JP H0648198U
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- JP
- Japan
- Prior art keywords
- voltage
- liquid crystal
- power supply
- lighting
- driving
- 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.)
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Abstract
(57)【要約】
【目的】 液晶デイスプレイユニツト応用機器の部品点
数の低減、小型化、作業性および信頼性の向上が図れる
液晶駆動用バイアス電源付陰極管点灯用ＤＣ−ＡＣイン
バータ電源を提供する。
【構成】 液晶駆動用バイアス直流電圧を取り出すため
のチヨツパ回路３を設けた。
(57) [Abstract] [Purpose] To provide a DC-AC inverter power supply for driving a cathode ray tube with a bias power supply for liquid crystal driving, which can reduce the number of parts of a liquid crystal display unit application device, reduce size, and improve workability and reliability . [Structure] A chipper circuit 3 for extracting a bias DC voltage for driving a liquid crystal is provided.
Description
【０００１】[0001]
本考案は、液晶デイスプレイユニツトのバツクライト光源に用いられる陰極管 の点灯用ＤＣ−ＡＣインバータ電源に係り、特に、液晶駆動用バイアス電源を一 体化した陰極管点灯用ＤＣ−ＡＣインバータ電源に関する。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC-AC inverter power supply for lighting a cathode ray tube used for a back light source of a liquid crystal display unit, and more particularly to a DC-AC inverter power supply for lighting a cathode ray tube in which a bias power source for driving a liquid crystal is integrated.
【０００２】[0002]
液晶デイスプレイユニツトでは、ロジツク用電源、液晶駆動用バイアス電源が 必要である。また、液晶は自己発光しないため、透過型液晶デイスプレイにおい ては、バツクライトが必要で光源に用いられる陰極管の点灯用電源も必要である 。 The liquid crystal display unit requires a power supply for logic and a bias power supply for driving the liquid crystal. Further, since the liquid crystal does not emit light by itself, a backlight is required in the transmissive liquid crystal display, and a power source for lighting the cathode tube used as the light source is also required.
【０００３】[0003]
これらの電源はそれぞれ、個々に配置、実装されていたため、液晶デイスプレ イユニツト応用機器の部品点数が多くなり、装置が大型化すると共に、作業性お よび信頼性の点で問題があつた。 Since each of these power supplies was individually arranged and mounted, the number of parts of the liquid crystal display application device increased, the device became large, and there were problems in workability and reliability.
【０００４】 本考案は、個々に配置、実装されている液晶駆動用バイアス電源と陰極管点灯 用ＤＣ−ＡＣインバータ電源を一体化することにより、液晶デイスプレイユニツ ト応用機器の部品点数の低減、小型化、作業性および信頼性の向上が図れる液晶 駆動用バイアス電源付陰極管点灯用ＤＣ−ＡＣインバータ電源を提供することを 目的とする。According to the present invention, the bias power supply for driving liquid crystal and the DC-AC inverter power supply for lighting the cathode tube, which are individually arranged and mounted, are integrated to reduce the number of components of the liquid crystal display unit application device and reduce the size. It is an object of the present invention to provide a DC-AC inverter power supply for driving a cathode ray tube with a bias power supply for driving a liquid crystal, which can improve the efficiency, workability and reliability.
【０００５】[0005]
前記目的を達成するため本考案は、陰極管点灯用ＤＣ−ＡＣインバータ電源に 、 １）チヨツパ回路を付加して直流電圧を取り出せる機能、あるいは、 ２）インバータトランスに別巻線を設け、その巻数に誘起される電圧を整流し直 流電圧を取り出せる機能、または、 ３）インバータトランスの主巻線に直列にＬＣ共振回路を設け、その共振電圧を 取り出し整流し、直流電圧を取り出せる機能、 を付加したものである。 In order to achieve the above-mentioned object, the present invention provides a DC-AC inverter power supply for lighting a cathode-ray tube, 1) a function to extract a DC voltage by adding a tipper circuit, or 2) a separate winding is provided in an inverter transformer, and the number of turns is changed. Added the function of rectifying the induced voltage and extracting the direct current voltage, or 3) the function of installing an LC resonance circuit in series with the main winding of the inverter transformer and extracting and rectifying the resonance voltage to extract the DC voltage. It is a thing.
【０００６】[0006]
本考案の陰極管点灯用ＤＣ−ＡＣインバータ電源では、別個に配置実装されて いる液晶駆動用バイアス電源は必要がなくなり、部品点数の低減、小型化、作業 性および信頼性の向上が図られる。 The DC-AC inverter power supply for lighting a cathode ray tube according to the present invention does not require a separately arranged and mounted liquid crystal drive bias power supply, and can reduce the number of parts, downsize, and improve workability and reliability.
【０００７】[0007]
以下、本考案の実施例を図面により説明する。 Embodiments of the present invention will be described below with reference to the drawings.
【０００８】 図１は、陰極管点灯用ＤＣ−ＡＣインバータ電源にチヨツパ方式の液晶駆動用 バイアス電源を設けた回路を示す。FIG. 1 shows a circuit in which a cathode-type DC-AC inverter power source for driving a cathode ray tube is provided with a bias power source for driving a liquid crystal of a catalyst type.
【０００９】 入力直流電圧Ｖｉｎは、陰極管点灯用ＤＣ−ＡＣインバータ回路１と、能動素 子Ｔｒ、チヨークコイルＣＨ、整流素子Ｄ、平滑コンデンサＣ、および制御回路 ２とで構成される、液晶駆動用バイアス電源部のチヨツパ回路３に入力される。 入力直流電圧Ｖｉｎは、チヨツパ回路３のチヨツパ動作と整流作用により出力 直流電圧Ｖｏｕｔとして取り出される。なお、本図は、定電圧制御によるマイナ ス電圧出力を示しているが、チヨークコイルＣＨ、能動素子Ｔｒの配置を変え、 かつ、能動素子Ｔｒ、整流素子Ｄの極性を反転することによりプラス電圧出力に も適用できることは明らかである。また、検出抵抗Ｒ１，Ｒ２の配置を変えるこ とにより定電流制御にも適用できる。The input DC voltage Vin is for driving a liquid crystal, which is composed of a DC-AC inverter circuit 1 for lighting a cathode ray tube, an active element Tr, a choke coil CH, a rectifying element D, a smoothing capacitor C, and a control circuit 2. It is input to the chipper circuit 3 of the bias power supply unit. The input DC voltage Vin is taken out as the output DC voltage Vout by the checker operation and the rectifying action of the checker circuit 3. Although this figure shows the negative voltage output by constant voltage control, the positive voltage output can be obtained by changing the arrangement of the choke yoke CH and the active element Tr and reversing the polarities of the active element Tr and the rectifying element D. It is clear that it can also be applied to Further, it can be applied to constant current control by changing the arrangement of the detection resistors R1 and R2.
【００１０】 図２は、陰極管点灯用ＤＣ−ＡＣインバータ電源のインバータトランスＴに巻 線ｎ３を設けた液晶駆動用バイアス電圧を取り出す三次巻線方式を示す回路であ る。FIG. 2 is a circuit showing a tertiary winding system in which a winding n3 is provided in an inverter transformer T of a DC-AC inverter power supply for lighting a cathode ray tube to extract a liquid crystal driving bias voltage.
【００１１】 陰極管点灯用ＤＣ−ＡＣインバータ回路１１の発振に伴い、三次巻線ｎ３に誘 起された交流電圧ｖ３は、整流素子Ｄ、平滑コンデンサＣ１、制御回路１２、能 動素子Ｔｒより構成される、チヨツパ回路１３に入力され、直流電圧Ｖｏｕｔと して取り出される。The AC voltage v3 induced in the tertiary winding n3 with the oscillation of the DC-AC inverter circuit 11 for lighting the cathode ray tube is composed of a rectifying element D, a smoothing capacitor C1, a control circuit 12, and an active element Tr. It is input to the chipper circuit 13, and is taken out as the DC voltage Vout.
【００１２】 本図では、定電圧制御によるマイナス電圧出力を示しているが、整流素子Ｄ、 制御回路１２の変更により容易にプラス電圧にて適用できることは明らかである 。また、制御回路１２の一部である検出抵抗Ｒ１，Ｒ２の配置を変えることによ り定電流制御にも適用できることも明らかである。制御なしで出力電圧Ｖｏｕｔ の変動が、液晶駆動用バイアス電圧として使用できる許容範囲にある場合は制御 回路１２は削除できる。Although a negative voltage output by constant voltage control is shown in this figure, it is obvious that a positive voltage can be easily applied by changing the rectifying element D and the control circuit 12. Further, it is also clear that the present invention can be applied to constant current control by changing the arrangement of the detection resistors R1 and R2 that are part of the control circuit 12. If the fluctuation of the output voltage Vout without control is within the allowable range that can be used as the bias voltage for driving the liquid crystal, the control circuit 12 can be deleted.
【００１３】 図３は、陰極管点灯用ＤＣ−ＡＣインバータ電源のインバータトランスＴの一 次巻線ｎ１に、ＬＣ共振回路を設けて液晶駆動用バイアス電圧を取り出す共振方 式の回路を示す。FIG. 3 shows a resonance type circuit in which an LC resonance circuit is provided in the primary winding n1 of the inverter transformer T of the DC-AC inverter power supply for lighting a cathode ray tube to extract a liquid crystal driving bias voltage.
【００１４】 インバータ回路２１内のインダクタンスＬとコンデンサＣ１で構成される共振 回路に発生した共振電圧は、コンデンサＣ２，Ｃ３，Ｃ４、整流素子Ｄ１，Ｄ２ 、制御回路２２より構成されるチヨツパ回路２３に入力され、直流電圧Ｖｏｕｔ として取り出される。The resonance voltage generated in the resonance circuit composed of the inductance L and the capacitor C1 in the inverter circuit 21 is transmitted to the chipper circuit 23 composed of the capacitors C2, C3 and C4, the rectifying elements D1 and D2, and the control circuit 22. It is input and taken out as a DC voltage Vout.
【００１５】 なお、本図では、定電圧制御によるマイナス電圧出力を示しているが、前記三 次巻線方式による方法と同様にマイナス電圧よりプラス電圧に、また、定電圧制 御より定電流制御にも適用できるのは明らかである。また、制御なしで出力電圧 Ｖｏｕｔの変動が、液晶駆動用バイアス電圧として使用できる許容範囲にある場 合は制御回路を削除できる。In this figure, the negative voltage output by the constant voltage control is shown, but as in the method by the tertiary winding method, the negative voltage is changed to the positive voltage and the constant voltage control is applied to the constant current control. Clearly applicable to If the fluctuation of the output voltage Vout without control is within the allowable range that can be used as the bias voltage for driving the liquid crystal, the control circuit can be deleted.
【００１６】[0016]
【考案の効果】 以上説明したように、本考案の液晶駆動用バイアス電源を一体化した陰極管点 灯用ＤＣ−ＡＣインバータ電源を使用することにより、別個に液晶駆動用バイア ス電源は必要とせず、液晶デイスプレイユニツト応用機器の簡略化、部品点数の 低減、小型化を図ることができると共に、作業性と信頼性の向上が図られる。As described above, by using the DC-AC inverter power supply for the cathode ray tube lighting which integrates the bias power supply for liquid crystal drive of the present invention, the bias power supply for liquid crystal drive is not required separately. Therefore, the liquid crystal display unit application equipment can be simplified, the number of parts can be reduced, the size can be reduced, and the workability and reliability can be improved.
【図１】本考案の第１の実施例に係る陰極管点灯用ＤＣ
−ＡＣインバータ電源の回路図である。FIG. 1 is a DC for lighting a cathode ray tube according to a first embodiment of the present invention.
-A circuit diagram of an AC inverter power supply.
【図２】本考案の第２の実施例に係る陰極管点灯用ＤＣ
−ＡＣインバータ電源の回路図である。FIG. 2 is a DC for lighting a cathode ray tube according to a second embodiment of the present invention.
-A circuit diagram of an AC inverter power supply.
【図３】本考案の第３の実施例に係る陰極管点灯用ＤＣ
−ＡＣインバータ電源の回路図である。FIG. 3 is a DC for lighting a cathode ray tube according to a third embodiment of the present invention.
-A circuit diagram of an AC inverter power supply.
１，１１，２１ インバータ回路 ３，１３，２３ チヨツパ回路 1,11,21 Inverter circuit 3,13,23 Chopper circuit
Claims (6)
ためのチヨツパ回路を設けたことを特徴とする陰極管点
灯用ＤＣ−ＡＣインバータ電源。1. A DC-AC inverter power source for lighting a cathode ray tube, comprising a chipper circuit for extracting a bias DC voltage for driving a liquid crystal.
アス直流電圧が定電圧または、定電流制御を施した電圧
で取り出せることを特徴とする陰極管点灯用ＤＣ−ＡＣ
インバータ電源。2. The DC-AC for lighting a cathode-ray tube according to claim 1, wherein the bias DC voltage for driving the liquid crystal can be taken out as a constant voltage or a voltage subjected to constant current control.
Inverter power supply.
この三次巻線に誘起された電圧を整流し、液晶駆動用バ
イアス直流電圧を取り出せるようにしたことを特徴とす
る陰極管点灯用ＤＣ−ＡＣインバータ電源。3. An inverter transformer provided with a tertiary winding,
A DC-AC inverter power supply for lighting a cathode-ray tube, wherein the voltage induced in the tertiary winding is rectified so that a bias DC voltage for driving a liquid crystal can be taken out.
アス直流電圧が定電圧または、定電流制御を施した電圧
で取り出せるようにしたことを特徴とする陰極管点灯用
ＤＣ−ＡＣインバータ電源。4. The DC-AC inverter power source for lighting a cathode ray tube according to claim 3, wherein the bias DC voltage for driving the liquid crystal can be taken out by a constant voltage or a voltage subjected to constant current control.
されたＬＣ共振回路より電圧を取り出し整流し、液晶駆
動用バイアス直流電圧を取り出せるようにしたことを特
徴とする陰極管点灯用ＤＣ−ＡＣインバータ電源。5. A DC-AC inverter for lighting a cathode-ray tube, wherein a voltage is taken out from an LC resonant circuit connected in series with an inverter transformer main winding and rectified to take out a bias DC voltage for driving a liquid crystal. Power supply.
アス直流電圧が定電圧または、定電流制御を施した電圧
で取り出せるようにしたことを特徴とする陰極管点灯用
ＤＣ−ＡＣインバータ電源。6. The DC-AC inverter power source for lighting a cathode ray tube according to claim 5, wherein the bias DC voltage for driving the liquid crystal can be taken out with a constant voltage or a voltage subjected to constant current control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992084071U JP2600155Y2 (en) | 1992-12-07 | 1992-12-07 | DC-AC inverter power supply for cathode tube lighting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992084071U JP2600155Y2 (en) | 1992-12-07 | 1992-12-07 | DC-AC inverter power supply for cathode tube lighting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0648198U true JPH0648198U (en) | 1994-06-28 |
| JP2600155Y2 JP2600155Y2 (en) | 1999-10-04 |
Family
ID=13820263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992084071U Expired - Lifetime JP2600155Y2 (en) | 1992-12-07 | 1992-12-07 | DC-AC inverter power supply for cathode tube lighting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2600155Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100999095B1 (en) * | 2003-06-11 | 2010-12-07 | 삼성전자주식회사 | Transformer, Power Supply And Liquid Crystal Display Using The Same |
-
1992
- 1992-12-07 JP JP1992084071U patent/JP2600155Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2600155Y2 (en) | 1999-10-04 |
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