JP2920944B2 - Lighting equipment - Google Patents
Lighting equipmentInfo
- Publication number
- JP2920944B2 JP2920944B2 JP1203405A JP20340589A JP2920944B2 JP 2920944 B2 JP2920944 B2 JP 2920944B2 JP 1203405 A JP1203405 A JP 1203405A JP 20340589 A JP20340589 A JP 20340589A JP 2920944 B2 JP2920944 B2 JP 2920944B2
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- power
- turned
- battery
- lighting
- 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 - Fee Related
Links
Landscapes
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はオーディオ・ビデオ機器（以下AV機器と略称
する）などの機能や動作を表示するために用いる液晶表
示器を照明する照明装置に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illuminating device for illuminating a liquid crystal display used for displaying functions and operations of an audio / video device (hereinafter abbreviated as an AV device). .
従来の技術 液晶表示器に用いられる液晶は、それ自体では発光せ
ず、そのエレメントに通電すると結晶構造が変わり、そ
の光屈折率が違ってくるため、他の光を反射して、それ
自体が発光している様に見えるものであり、周辺が暗い
時は見えにくい。この欠点を補うために、従来より液晶
表示器を照明して暗い場所でも表示内容を確認できる様
に、機器の電源がONの時だけ照明するもの、AC電源の時
だけ照明するもの、必要な時だけスイッチをONして照明
するもの、時計機能つきのために常時照明しているもの
等がある。2. Description of the Related Art The liquid crystal used in a liquid crystal display does not emit light by itself, and when a current is applied to the element, the crystal structure changes and the light refractive index changes. It appears to be emitting light and is difficult to see when the surroundings are dark. In order to compensate for this drawback, the LCD panel is illuminated only when the power of the device is ON, and only when the AC power is ON. There are those that turn on only when the switch is turned on and those that are always lit because they have a clock function.
発明が解決しようとする課題 しかしながら上記の従来の構成では、最近のAV機器等
の大半の機器に時計機能が搭載されている現状から、上
記の照明方法のように電源がONしている時だけ照明する
方法では、電源OFF時の時計表示が見えにくく、また常
時照明する方法では電池で駆動している場合には電池寿
命が短くなるという問題があった。さらに夜間など室内
が暗い時には照明が明るすぎる場合もあるという問題も
有していた。本発明は上記従来の問題点を解決するもの
で、上記のAV機器がAC電源で駆動される時は機器の電源
がONの場合は明るく照明し、電源がOFFの場合は少し暗
く照明するようにして夜間など室内が暗い時でも適度な
明るさに設定する事と、また電池で駆動する場合は機器
の電源がONの時は明るく照明し、電源がOFFの場合は消
灯して電池の消耗をさけ電池寿命を伸ばす事を目的とす
るものである。Problems to be Solved by the Invention However, in the conventional configuration described above, since the clock function is installed in most devices such as recent AV devices, only when the power is ON as in the lighting method described above, In the lighting method, there is a problem that the clock display when the power is turned off is difficult to see, and the constant lighting method has a problem that the battery life is shortened when driven by a battery. Furthermore, when the room is dark, such as at night, the illumination may be too bright. The present invention solves the above-mentioned conventional problems.When the above AV device is driven by AC power, the device is illuminated brightly when the device is turned on, and is dimly lit when the device is turned off. Set it to an appropriate brightness even when the room is dark, such as at night, and when driving with batteries, illuminate brightly when the device is turned on, turn off when the power is off and turn off the battery The purpose is to extend battery life.
課題を解決するための手段 上記問題点を解決するために本発明の照明装置はAV機
器がAC電源で駆動されるか電池で駆動されるかを判別し
切換える回路と、AC電源または電池駆動に応じて機器の
電源のON/OFF状態により照明装置の発生する光の輝度を
「明，暗，消灯」の３段階に制御する回路とからなり、
AC電源の時は機器の電源のON/OFFに応じて照明装置の明
るさを「明／暗」とし、電池の時は機器の電源のON/OFF
に応じて照明装置の明るさを「明／消灯」と制御するよ
うに構成したものである。Means for Solving the Problems In order to solve the above problems, the lighting device of the present invention has a circuit for determining and switching whether the AV equipment is driven by AC power or a battery, and an AC power supply or battery drive. A circuit that controls the brightness of the light generated by the lighting device in three stages of “bright, dark, and off” according to the ON / OFF state of the power supply of the device.
When using AC power, the brightness of the lighting device is set to “bright / dark” according to the ON / OFF of the device power, and when using batteries, the device power is turned ON / OFF.
, The brightness of the lighting device is controlled to be “bright / dark”.
作用 本発明は上記した構成によって、AV機器がAC電源で駆
動される場合は機器の電源がONの時は液晶表示器を明る
く照明し、電源がOFFの時は少し暗く照明するように輝
度が制御され、夜間など室内が暗い場合にも適度な明る
さが設定され、また電池の時は機器の電源がONの場合は
AC電源の時と同様に明るく照明し、電源がOFFの時は照
明装置を消灯させて電池の長寿命化を実現するものであ
る。Effect of the Invention According to the above configuration, when the AV device is driven by the AC power supply, the brightness is illuminated so that the liquid crystal display is brightly illuminated when the device is turned on and slightly dimmed when the power is turned off. It is controlled so that even when the room is dark, such as at night, an appropriate brightness is set.
It illuminates brightly as in the case of AC power supply, and when the power is off, turns off the lighting device to realize a longer battery life.
実施例 以下本発明の一実施例の照明装置について、図面を参
照しながら説明する。第１図は本発明の一実施例の照明
装置のブロック図である。第１図において、１は光発生
部、２は第２の安定化電源、３は第１の輝度設定用抵
抗、４は第２の輝度設定用抵抗、５はスイッチングトラ
ンジスタ、6,7はバイアス抵抗、8,15はスイッチングダ
イオード、９は第１の安定化電源、10は電源スイッチ、
11は電源切換部、12は電池、13はAC/DC切換スイッチ、1
4はAC入力プラグ、16は整流回路、17〜24は照明用LED、
25は液晶表示器、26は液晶駆動部である。Embodiment Hereinafter, a lighting device according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a lighting device according to an embodiment of the present invention. In FIG. 1, 1 is a light generating unit, 2 is a second stabilized power supply, 3 is a first brightness setting resistor, 4 is a second brightness setting resistor, 5 is a switching transistor, and 6, 7 are biases. 8 and 15 are switching diodes, 9 is a first stabilized power supply, 10 is a power switch,
11 is a power switch, 12 is a battery, 13 is an AC / DC switch, 1
4 is an AC input plug, 16 is a rectifier circuit, 17 to 24 are lighting LEDs,
25 is a liquid crystal display and 26 is a liquid crystal drive.
以下、図面を用いて本発明の照明装置の作用について
説明する。Hereinafter, the operation of the lighting device of the present invention will be described with reference to the drawings.
まず始めに液晶表示器25を用いるAV機器がAC電源で駆
動される場合について説明する。電源切換部11はAC入力
プラグ14にACコードが差込まれると自動的に連動してAC
/DC切換スイッチ13がAC側すなわち端子ｂの方に切換わ
り、AC入力プラグ14より入力されたAC電源は整流回路16
により直流電源に変換される。ここで上記AV機器の電源
スイッチ10がON状態の時は、AC/DC切換スイッチ13と電
源スイッチ10を介して第１の安定化電源９に直流電源が
接続される。第１の安定化電源９は第２の安定化電源２
への出力Ａと、スイッチングトランジスタ５を制御する
出力Ｂを持ち、出力Ａはスイッチングダイオード８を介
して第２の安定化電源２に入力され、第２の安定化電源
２の出力は光発生部１の照明用LED17〜24のアノード側
Ｃに接続される。ここで照明用LED17〜24はLED17〜20が
同一方向に直列に接続され、LED21〜24も同様に接続さ
れている。さらに、これらを並列に接続するためにLED1
7と21のアノード、LED20と24のカソードを接続してい
る。また該照明用LED17〜24のカソード側Ｄには第１の
輝度設定用抵抗３が接続され、該第１の輝度設定用抵抗
３の一方端子には第２の輝度設定用抵抗４とスイッチン
グトランジスタ５のコレクタが接続されている。第２の
輝度設定用抵抗４のもう一方の端子とスイッチングトラ
ンジスタ５のエミッタはGNDに接続されている。一方上
記第１の安定化電源９の出力Ｂは、バイアス抵抗6,7を
介してスイッチングトランジスタ５のベース側に入力さ
れスイッチングトランジスタ５をON状態とする。スイッ
チングトランジスタ５がON状態となると、第２の輝度設
定用抵抗４がショート状態となり、第２の安定化電源２
から供給される照明用LED17〜24への電流が増加するた
め照明用LED17〜24は明るく点灯する。次にAC電源で駆
動し、電源スイッチ10がOFFの場合を説明すると、照明
用LED17〜24の明るさが電源電圧が変化しても一定に保
つための第２の安定化電源２には整流回路16よりスイッ
チングダイオード15を介して電源が供給される。しかし
ながらスイッチングトランジスタ５は第１の安定化電源
９が動作していないためOFF状態であり照明用LED17〜24
の輝度は第１の輝度設定用抵抗３と第２の輝度設定用抵
抗４の抵抗値の和で設定されるため電源スイッチ10がON
の時よりも電流が減少し照明用LED17〜24の輝度は暗く
なる。First, a case where an AV device using the liquid crystal display 25 is driven by an AC power supply will be described. When the AC cord is inserted into the AC input plug 14, the power switch 11 automatically
The / DC switch 13 is switched to the AC side, that is, the terminal b, and the AC power input from the AC input plug 14 is supplied to the rectifier circuit 16.
Is converted to a DC power supply. Here, when the power switch 10 of the AV device is in the ON state, a DC power supply is connected to the first stabilized power supply 9 via the AC / DC switch 13 and the power switch 10. The first stabilized power supply 9 is the second stabilized power supply 2
And an output B for controlling the switching transistor 5. The output A is input to the second stabilized power supply 2 via the switching diode 8, and the output of the second stabilized power supply 2 is a light generating unit. It is connected to the anode side C of one of the illumination LEDs 17 to 24. Here, the lighting LEDs 17 to 24 are connected in series in the same direction as the LEDs 17 to 20, and the LEDs 21 to 24 are similarly connected. In addition, LED1
The anode of 7 and 21 and the cathode of LED 20 and 24 are connected. A first luminance setting resistor 3 is connected to the cathode side D of the illumination LEDs 17 to 24, and a second luminance setting resistor 4 and a switching transistor are connected to one terminal of the first luminance setting resistor 3. 5 collectors are connected. The other terminal of the second luminance setting resistor 4 and the emitter of the switching transistor 5 are connected to GND. On the other hand, the output B of the first stabilized power supply 9 is input to the base side of the switching transistor 5 via the bias resistors 6 and 7, and the switching transistor 5 is turned on. When the switching transistor 5 is turned on, the second luminance setting resistor 4 is short-circuited, and the second stabilized power supply 2 is turned on.
Since the current supplied to the illumination LEDs 17 to 24 from the LED increases, the illumination LEDs 17 to 24 light up brightly. Next, the case where the power supply switch 10 is turned off by driving with an AC power supply will be described. Power is supplied from the circuit 16 via the switching diode 15. However, the switching transistor 5 is in the OFF state because the first stabilized power supply 9 is not operating, and the illumination LEDs 17 to 24
Is set by the sum of the resistance values of the first luminance setting resistor 3 and the second luminance setting resistor 4, so that the power switch 10 is turned on.
And the brightness of the illumination LEDs 17 to 24 becomes darker.
次に、電池で駆動する場合の動作を説明すると、電源
切換部11のAC入力プラグ14からACコードを抜取るとAC/D
C切換スイッチ13は自動的に電池駆動状態に切替わる。
始めに電源スイッチ10がON時の動作についてはAC駆動時
と同様で、AC/DC切換スイッチ13と電源スイッチ10を介
して第１の安定化電源９に電源供給され、第１の安定化
電源９の出力ＡとＢにより第２の安定化電源２とスイッ
チングトランジスタ５を制御して照明用LED17〜24を明
るく点灯させる。次に電源スイッチ10がOFFの時には第
２の安定化電源２への電源供給がないため光発生部１は
点灯しない。以上によりAV機器がAC電源で駆動される
か、電池で駆動されるかを自動的に判別し、AC電源で駆
動される場合においては、AV機器の電源がON時には明る
く、OFF時は少し暗く照明し、AV機器が電池で駆動され
る場合においては、AV機器の電源がONの時はAC電源と同
様に明るく照明し、OFF時には消灯する照明装置が構成
できる。Next, a description will be given of the operation when the battery is driven by a battery. When the AC cord is disconnected from the AC input plug 14 of the power supply switching unit 11, the AC / D
The C changeover switch 13 automatically switches to the battery driving state.
First, the operation when the power switch 10 is ON is the same as in the case of the AC drive. The power is supplied to the first stabilized power supply 9 via the AC / DC changeover switch 13 and the power switch 10, and the first stabilized power supply The outputs A and B 9 control the second stabilized power supply 2 and the switching transistor 5 to light up the illumination LEDs 17 to 24 brightly. Next, when the power switch 10 is turned off, there is no power supply to the second stabilized power supply 2, so that the light generating unit 1 does not light. As described above, it is automatically determined whether the AV device is driven by the AC power supply or the battery, and when the AV device is driven by the AC power supply, the AV device is bright when the power is ON and slightly dark when the power is OFF. When the lighting and the AV device are driven by a battery, a lighting device that illuminates brightly when the power of the AV device is ON as in the case of the AC power supply and turns off when the power is OFF can be configured.
発明の効果 以上のように本発明は、機能や動作状態を現すために
液晶表示器を用いたAV機器がAC電源で駆動されるか、電
池で駆動されるかを自動的に判別し、AC電源で駆動され
る場合においては、AV機器の電源がON時には明るく、OF
F時は少し暗く液晶表示器を照明し、AV機器が電池で駆
動される場合においては、AV機器の電源がONの時はAC電
源と同様に明るく照明し、OFF時には消灯するように構
成することにより、使用しているときは明るく、AC電源
時には夜間など室内が暗いときでも適度な明るさを保
ち、電池の時は電池寿命をより長くすることを実現した
液晶表示器用の照明装置を提供するものである。Effect of the Invention As described above, the present invention automatically determines whether an AV device using a liquid crystal display is driven by an AC power source or a battery in order to express functions and operation states, When driven by a power source, the device is bright when the
When F is used, the LCD display is illuminated slightly darker, and when the AV device is driven by a battery, the device is illuminated brightly like the AC power supply when the AV device is turned on, and is turned off when the device is turned off. This provides a lighting device for liquid crystal displays that maintains brightness when in use, maintains an appropriate brightness even when the room is dark, such as at night when AC power is used, and extends battery life when using batteries. Is what you do.
第１図は本発明の実施例における液晶表示器用の照明装
置のブロック図、第２図はAV機器等の電源のON/OFFに対
する照明装置の輝度を現すタイミングチャートである。 １……光発生部、３……輝度設定用抵抗、４……輝度設
定用抵抗、５……スイッチングトランジスタ、8,15……
スイッチングダイオード、10……電源スイッチ、11……
電源切換部、12……電池、13……AC/DC切換スイッチ、1
4……AC入力プラグ、16……整流回路、17〜24……照明
用LED、25……液晶表示器。FIG. 1 is a block diagram of a lighting device for a liquid crystal display in an embodiment of the present invention, and FIG. 2 is a timing chart showing luminance of the lighting device with respect to ON / OFF of a power supply of an AV device or the like. 1 ... light generation section, 3 ... brightness setting resistor, 4 ... brightness setting resistor, 5 ... switching transistor, 8,15 ...
Switching diode, 10 Power switch, 11
Power supply switch, 12… Battery, 13… AC / DC switch, 1
4 AC input plug, 16 rectifier circuit, 17 to 24 LED for lighting, 25 liquid crystal display.
Claims (1)
液晶表示器を後部より照明する照明装置であって、上記
機器がAC電源で駆動されるか電池で駆動されるかを自動
的に判別して切換える回路と、AC電源または電池駆動に
おける機器の電源のON/OFF状態により照明装置の発生す
る光の輝度を制御する制御回路を具備し、AC電源で駆動
される場合においては、機器の電源がON時には明るく照
明し、OFF時は少し暗く照明するように構成し、機器が
電池で駆動される場合においては、機器の電源がONの時
はAC電源と同様に明るく照明し、OFF時には消灯するよ
うに構成したことを特徴とする照明装置。1. A lighting device for illuminating a liquid crystal display used for displaying the function and operation of a device from a rear part, and automatically determines whether the device is driven by an AC power supply or a battery. A circuit for determining and switching, and a control circuit for controlling the brightness of the light generated by the lighting device according to the ON / OFF state of the power supply of the device in AC power or battery drive. When the device is powered by batteries, it is illuminated brightly like the AC power source when the device is powered on, and off when the device is powered by batteries. A lighting device characterized in that the lighting device is sometimes turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1203405A JP2920944B2 (en) | 1989-08-05 | 1989-08-05 | Lighting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1203405A JP2920944B2 (en) | 1989-08-05 | 1989-08-05 | Lighting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0365986A JPH0365986A (en) | 1991-03-20 |
| JP2920944B2 true JP2920944B2 (en) | 1999-07-19 |
Family
ID=16473515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1203405A Expired - Fee Related JP2920944B2 (en) | 1989-08-05 | 1989-08-05 | Lighting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2920944B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007109483A (en) * | 2005-10-12 | 2007-04-26 | Chugoku Electric Power Co Inc:The | Voltage indicator |
-
1989
- 1989-08-05 JP JP1203405A patent/JP2920944B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0365986A (en) | 1991-03-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105392239B (en) | Intensity adjustable LED lamp | |
| JP2002324685A (en) | Lighting device | |
| KR20080026088A (en) | Light emission control circuit for lighting a plurality of light emitting elements, and illuminating apparatus and mobile information terminal having the same | |
| JPH1022071A (en) | El lighting device | |
| JP2005332586A (en) | Lighting dimmer | |
| JP2920944B2 (en) | Lighting equipment | |
| JP3603780B2 (en) | Control method of portable terminal and LED for backlight | |
| JP3826671B2 (en) | Remote control transmitter | |
| JP3648639B2 (en) | Bicycle lighting device | |
| JPH06265848A (en) | Method and device for display | |
| JP3752333B2 (en) | Mobile device | |
| JP3228646U (en) | High-precision control type current control device | |
| CN219479723U (en) | Multifunctional mirror | |
| JPH1078765A (en) | Led driving circuit | |
| JPH05109489A (en) | Illumination device | |
| KR20040100061A (en) | Device for Extending Life Time and Saving Power In Liquid Crystal Display | |
| KR200286891Y1 (en) | A remote control type table lighting apparatus for having function of time display and alarm | |
| JPH0677534A (en) | Recording equipment | |
| JPH0710789U (en) | Light emitting element brightness adjustment device | |
| JP3610727B2 (en) | Display device | |
| JPH03127490A (en) | Data terminal device | |
| JP3121067U (en) | Lighting set controller | |
| TWI310665B (en) | Lighting circuit | |
| JPH0353257Y2 (en) | ||
| KR910007182Y1 (en) | Power source driving display circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |