JPH09102397A - DC-AC inverter for cold cathode tube and liquid crystal display module - Google Patents
DC-AC inverter for cold cathode tube and liquid crystal display moduleInfo
- Publication number
- JPH09102397A JPH09102397A JP7260134A JP26013495A JPH09102397A JP H09102397 A JPH09102397 A JP H09102397A JP 7260134 A JP7260134 A JP 7260134A JP 26013495 A JP26013495 A JP 26013495A JP H09102397 A JPH09102397 A JP H09102397A
- Authority
- JP
- Japan
- Prior art keywords
- cold cathode
- cathode tube
- inverter
- liquid crystal
- crystal display
- 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
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/04—Maintaining the quality of display appearance
- G09G2320/041—Temperature compensation
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Liquid Crystal Display Device Control (AREA)
- Inverter Devices (AREA)
Abstract
(57)【要約】
【課題】 液晶表示モジュールにおいてバックライトし
て使用する冷陰極管を起動時から輝度安定状態まで速く
スムーズに安定した輝度で点灯させることができる冷陰
極管用ＤＣ−ＡＣインバータを提供する。
【解決手段】 冷陰極管２０の周囲温度を検知する温度
センサ部１８と、この温度センサ部１８の出力に基づい
て、インバータ本体２１の発振周波数を冷陰極管２０の
周囲温度と反比例するように変化させる発振周波数可変
制御回路部１９を設ける。これによって、冷陰極管２０
の周囲温度が低いときは発振周波数が高いので、冷陰極
管２０の輝度が急速に増加するとともに冷陰極管２０の
温度も早く上昇する。また、冷陰極管２０の温度が高く
なると、発振周波数が下がるので、輝度の上昇が抑えら
れることになり、負帰還作用で速やかにスムーズに安定
点灯状態へ移行する。
(57) Abstract: A DC-AC inverter for a cold cathode tube capable of quickly and smoothly lighting a cold cathode tube used as a backlight in a liquid crystal display module from startup to a stable brightness state with stable brightness. provide. SOLUTION: A temperature sensor section 18 for detecting an ambient temperature of a cold cathode tube 20 and an oscillation frequency of an inverter main body 21 are inversely proportional to an ambient temperature of the cold cathode tube 20 based on an output of the temperature sensor section 18. A variable oscillation frequency control circuit section 19 for changing is provided. Thereby, the cold cathode fluorescent lamp 20
When the ambient temperature is low, the oscillation frequency is high, so that the brightness of the cold cathode tube 20 increases rapidly and the temperature of the cold cathode tube 20 also rises quickly. Further, when the temperature of the cold cathode fluorescent lamp 20 becomes high, the oscillation frequency is lowered, so that the increase of the luminance is suppressed, and the negative feedback action causes a smooth and smooth transition to the stable lighting state.
Description
【０００１】[0001]
【発明の属する技術分野】この発明は冷陰極管を点灯さ
せるための冷陰極管用ＤＣ−ＡＣインバータおよび冷陰
極管用ＤＣ−ＡＣインバータを備えた液晶表示モジュー
ルに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold cathode fluorescent lamp DC-AC inverter for lighting a cold cathode fluorescent lamp and a liquid crystal display module equipped with the cold cathode fluorescent lamp DC-AC inverter.
【０００２】[0002]
【従来の技術】近年、さらに明るく見やすい表示画面の
液晶表示モジュールがコンピュータ・ワープロ・ＰＰＣ
（複写機）等に求められ、操作性向上のために、透明タ
ッチパネルおよび高輝度冷陰極管（以下、高輝度ＣＣＦ
Ｌと記す）の採用が増加している。2. Description of the Related Art In recent years, liquid crystal display modules with brighter and easier-to-see display screens have been used in computers, word processors, and PPCs.
(Copier), etc., to improve operability, a transparent touch panel and a high-brightness cold cathode tube (hereinafter, high-brightness CCF)
(L) is increasing.
【０００３】以下に、ＰＰＣ等に使用されている液晶表
示モジュールの構成について説明する。図３は、液晶表
示モジュールの構成を示す概略図である。図３におい
て、１１は液晶表示パネル（ＬＣＤパネル）である。１
２は液晶表示パネル１１を駆動する駆動回路部である。
１３は液晶表示パネル１１の裏面から光を照射するバッ
クライトユニットであり、光源としては高輝度ＣＣＦＬ
を使用していることが多い。１４はＤＣ電源より給電さ
れて高輝度ＣＣＦＬを駆動するための高電圧の高周波交
流電圧を出力する冷陰極管用ＤＣ−ＡＣインバータであ
る。The structure of a liquid crystal display module used for PPC or the like will be described below. FIG. 3 is a schematic diagram showing the configuration of the liquid crystal display module. In FIG. 3, 11 is a liquid crystal display panel (LCD panel). 1
Reference numeral 2 is a drive circuit section for driving the liquid crystal display panel 11.
A backlight unit 13 emits light from the back surface of the liquid crystal display panel 11, and has a high-luminance CCFL as a light source.
Are often used. Reference numeral 14 is a DC-AC inverter for cold cathode tubes which is supplied with power from a DC power source and outputs a high-frequency high-frequency AC voltage for driving the high-luminance CCFL.
【０００４】図４は従来の冷陰極管用ＤＣ−ＡＣインバ
ータの回路ブロック図を示す。図４において、１５はＤ
Ｃ電源を入力する入力回路部である。１６は入力回路部
１５から加えられる直流電圧により動作する高周波発振
動作を行う発振回路部であり、トランジスタ等で構成さ
れる。１７は発振回路部１６の出力電圧を昇圧する昇圧
回路部であり、トランス・コンデンサ等で構成されてい
る。２０は昇圧回路部１７より高電圧の高周波交流電圧
が加えられることにより点灯する高輝度のＣＣＦＬであ
る。FIG. 4 is a circuit block diagram of a conventional DC-AC inverter for cold cathode tubes. In FIG. 4, 15 is D
It is an input circuit unit for inputting the C power supply. Reference numeral 16 denotes an oscillation circuit section that performs a high-frequency oscillation operation that is operated by a DC voltage applied from the input circuit section 15, and is composed of a transistor or the like. Reference numeral 17 denotes a booster circuit unit that boosts the output voltage of the oscillator circuit unit 16 and is composed of a transformer and a capacitor. Reference numeral 20 denotes a high-intensity CCFL which is turned on when a high-frequency high-frequency AC voltage is applied from the booster circuit unit 17.
【０００５】以上のように構成された液晶表示モジュー
ルにおいて、以下その動作について説明する。表示用メ
モリ（図示せず）より読み出されたデータが液晶表示モ
ジュールへ入力されると、駆動回路部１２において液晶
駆動電圧および駆動波形に変形されて印加されることに
より液晶表示パネル１１にデータが表示される。一方、
ＤＣ電源により冷陰極管用ＤＣ−ＡＣインバータ１４に
直流電力が供給されることで、冷陰極管用ＤＣ−ＡＣイ
ンバータ１４が動作して高電圧の高周波交流電圧をバッ
クライト１３のＣＣＦＬに加え、これによってバックラ
イト１３を点灯させて液晶表示パネル１１を透過照明す
る。The operation of the liquid crystal display module having the above structure will be described below. When the data read from the display memory (not shown) is input to the liquid crystal display module, the driving circuit section 12 transforms and applies the liquid crystal driving voltage and the driving waveform to the liquid crystal display panel 11. Is displayed. on the other hand,
By supplying direct-current power to the cold cathode fluorescent lamp DC-AC inverter 14 by the DC power source, the cold cathode fluorescent lamp DC-AC inverter 14 operates to apply a high-frequency high-frequency AC voltage to the CCFL of the backlight 13, and thereby. The backlight 13 is turned on to illuminate the liquid crystal display panel 11 by transmission.
【０００６】透過型液晶表示パネルではパネル裏面より
光を照射し、液晶表示パネルにて光を透過／遮断させる
ことによりデータを表示させるが、液晶表示パネルおよ
びその表面に貼り付けられている偏光板における光の透
過率が低いために、明るく見やすい表示画面とするには
バックライトとして、高輝度のものが求められている。
その結果、バックライト１３としては高輝度タイプのＣ
ＣＦＬが使用されることが多くなっている。In a transmissive liquid crystal display panel, data is displayed by irradiating light from the rear surface of the panel and transmitting / blocking the light in the liquid crystal display panel. The liquid crystal display panel and a polarizing plate attached to the surface thereof are used. Because of low light transmittance in, the backlight is required to have high brightness in order to obtain a bright and easy-to-see display screen.
As a result, the backlight 13 is a high brightness type C
CFLs are increasingly used.
【０００７】ＣＣＦＬは図４の冷陰極管用ＤＣ−ＡＣイ
ンバータにて得られる固定周波数の高電圧の高周波交流
電圧で点灯を行うが、その動作は、ＤＣ電圧をトランジ
スタ等により、ある周波数でスイッチングしてＡＣ電圧
へ変換した後にコンデンサ・トランスで高電圧に昇圧
し、高輝度のＣＣＦＬに必要な電圧を加えるというもの
である。The CCFL is lit with a high-frequency high-frequency AC voltage of a fixed frequency obtained by the DC-AC inverter for cold cathode fluorescent lamps shown in FIG. 4, and its operation is to switch the DC voltage at a certain frequency by a transistor or the like. After that, the voltage is converted to an AC voltage and then boosted to a high voltage by a capacitor transformer, and the necessary voltage is applied to the high brightness CCFL.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、従来の
固定周波数で発振する構成の冷陰極管用ＤＣ−ＡＣイン
バータでは、起動時においてはＣＣＦＬ２０が冷えてい
るために輝度が低く、暖まるにつれて輝度が高まってい
き、あるところで安定するものであるため、使用する上
で輝度が安定するまでに時間がかかるという問題を有し
ていた。また、この問題点を解決するために，起動時に
おいては、冷陰極管用ＤＣ−ＡＣインバータの出力電圧
を意図的に高くする方法もあるが、高電圧とするために
ＣＣＦＬ２０の寿命が短くなるという問題を有してい
た。However, in the conventional DC-AC inverter for a cold cathode tube which oscillates at a fixed frequency, the CCFL 20 is cold at the time of start-up, so the brightness is low, and the brightness increases as the temperature rises. Since it is stable at a certain point, there is a problem that it takes time for the brightness to stabilize in use. In order to solve this problem, there is also a method of intentionally increasing the output voltage of the DC-AC inverter for cold cathode tubes at the time of startup, but the life of the CCFL 20 is shortened because the voltage is high. Had a problem.
【０００９】この発明は、上記従来の課題を解決するも
ので、起動時から輝度安定状態まで速くスムーズに移行
させ、安定した輝度で点灯させることができる冷陰極管
用ＤＣ−ＡＣインバータを提供することを目的とするも
のである。The present invention solves the above-mentioned conventional problems, and provides a DC-AC inverter for a cold cathode tube, which can be quickly and smoothly shifted from a start-up to a stable brightness state and can be lit with stable brightness. The purpose is.
【００１０】[0010]
【課題を解決するための手段】この目的を達成するため
に、この発明の冷陰極管用ＤＣ−ＡＣインバータは、直
流電源電圧を交流電源電圧に変換してＣＣＦＬへ供給す
るインバータ本体と、ＣＣＦＬの周囲温度を検知する温
度センサ部と、この温度センサ部の出力に基づきインバ
ータ本体の発振周波数をＣＣＦＬの周囲温度に反比例す
るように変化させる発振周波数可変制御回路部とを備え
ている。In order to achieve this object, a DC-AC inverter for a cold cathode tube according to the present invention comprises an inverter body for converting a DC power supply voltage into an AC power supply voltage and supplying the CCFL, and a CCFL. A temperature sensor unit that detects the ambient temperature and an oscillation frequency variable control circuit unit that changes the oscillation frequency of the inverter main body based on the output of the temperature sensor unit so as to be inversely proportional to the ambient temperature of the CCFL are provided.
【００１１】この構成によれば、起動時においてはＣＣ
ＦＬの周囲温度が輝度の安定した安定点灯状態よりも低
いことを温度センサ部が検知し、安定点灯状態よりも高
い周波数にて発振させるため、固定周波数で起動させる
時よりも高速に輝度の安定し安定点灯状態へ到達させる
ことができる。さらに安定点灯状態に近づくにつれてＣ
ＣＦＬの周囲温度が暖まっていくために、その温度を検
知すると起動時よりも低い周波数にて発振するために、
固定周波数にて点灯させるときよりも輝度変化が少な
く、安定した輝度で点灯させることができる。また、イ
ンバータの出力電圧でなく周波数を可変させるために，
ＣＣＦＬの寿命に対しても影響を与えることはない。According to this configuration, the CC
The temperature sensor detects that the ambient temperature of the FL is lower than the stable lighting state where the brightness is stable, and oscillates at a higher frequency than the stable lighting state, so the brightness is stabilized faster than when starting at a fixed frequency. Then, it is possible to reach a stable lighting state. Furthermore, C approaches the stable lighting state.
Since the ambient temperature of the CFL warms up, if the temperature is detected, it will oscillate at a frequency lower than that at startup,
There is less change in brightness than when lighting at a fixed frequency, and it is possible to light with stable brightness. Also, in order to change the frequency instead of the output voltage of the inverter,
It does not affect the life of the CCFL.
【００１２】以上のように、この冷陰極管用ＤＣ−ＡＣ
インバータによると、起動時から輝度安定状態まで速く
スムーズに安定した輝度でＣＣＦＬを点灯させることが
可能となる。As described above, this DC-AC for cold cathode tubes is used.
According to the inverter, the CCFL can be turned on quickly and smoothly with stable brightness from the startup to the stable brightness state.
【００１３】[0013]
【発明の実施の形態】以下、この発明の実施の形態の冷
陰極管用ＤＣ−ＡＣインバータおよびそれを備えた液晶
表示モジュールについて、図１および図２を参照しなが
ら説明する。図１はこの発明の冷陰極管用ＤＣ−ＡＣイ
ンバータの回路ブロック図を示す。図１において、１８
はＣＣＦＬ２０の周囲温度を検知するサーミスタ等の温
度センサ部である。１９は温度センサ部１８の出力に基
づきＣＣＦＬ２０の周囲温度に反比例するように発振回
路部１６の発振周波数を変化させる、つまり周波数変調
する発振周波数可変制御回路部である。その他の構成
は、つまり、入力回路部１５，発振回路部１６および昇
圧回路部１７からなるインバータ本体２１は図４に示し
た従来例と同じである。BEST MODE FOR CARRYING OUT THE INVENTION A DC-AC inverter for a cold cathode tube and a liquid crystal display module including the same according to an embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 shows a circuit block diagram of a DC-AC inverter for cold cathode tubes according to the present invention. In FIG. 1, 18
Is a temperature sensor unit such as a thermistor that detects the ambient temperature of the CCFL 20. Reference numeral 19 denotes an oscillation frequency variable control circuit unit that changes the oscillation frequency of the oscillation circuit unit 16 so as to be inversely proportional to the ambient temperature of the CCFL 20 based on the output of the temperature sensor unit 18, that is, performs frequency modulation. Other configurations, that is, the inverter main body 21 including the input circuit section 15, the oscillation circuit section 16 and the booster circuit section 17 is the same as the conventional example shown in FIG.
【００１４】図２（ａ）は点灯スタート後のＣＣＦＬの
輝度の変化の特性図であり、実線Ａ 1 は実施の形態（発
振周波数可変）の場合の輝度の変化を示し、実線Ａ2 は
従来例（発振周波数固定）の場合の輝度の変化を示し、
図２（ｂ）は点灯スタート後の発振周波数の変化の特性
図であり、実線Ｂ1 は実施の形態（発振周波数固定）の
場合を示し、実線Ｂ2 は従来例（発振周波数固定）の場
合を示している。FIG. 2A shows the CCFL after the start of lighting.
It is a characteristic diagram of the change of the brightness, solid line A 1Is an embodiment (from
Shows the change in luminance when the vibration frequency is variable, and the solid line ATwoIs
Shows the change in brightness in the case of the conventional example (fixed oscillation frequency),
Figure 2 (b) shows the characteristics of the change in the oscillation frequency after the start of lighting.
Figure, solid line B1Of the embodiment (fixed oscillation frequency)
Case, solid line BTwoIs the case of the conventional example (fixed oscillation frequency)
It shows the result.
【００１５】この冷陰極管用ＤＣ−ＡＣインバータによ
れば、サーミスタ等の温度センサ部１８によりＣＣＦＬ
２０の周囲温度が低いことを検知すると、発振周波数可
変制御回路部１９の働きで、ＣＣＦＬ２０の周囲温度に
反比例した発振周波数で発振回路部１６のトランジスタ
がスイッチングするために、図２（ｂ）に示すように、
起動初期は、輝度の安定した安定点灯状態よりも高い周
波数にてＣＣＦＬ２０を点灯させる。この結果図２
（ａ）に示すように、固定周波数にて点灯開始させる時
よりも速い時間で輝度の安定した安定点灯状態へ到達す
る。この後、負帰還の作用で、冷陰極管用ＤＣ−ＡＣイ
ンバータは、ＣＣＦＬ２０の周囲温度が高くなることに
より起動時よりも低い周波数でＣＣＦＬ２０を点灯させ
ることになるため、固定周波数にて起動した時（点灯開
始初期の高い周波数のまま点灯を継続させた場合）のよ
うに極端に明るくなることなく、安定した輝度にて点灯
させることができる。According to this DC-AC inverter for cold cathode tubes, the CCFL is provided by the temperature sensor section 18 such as a thermistor.
When it is detected that the ambient temperature of 20 is low, the oscillation frequency variable control circuit section 19 functions to switch the transistor of the oscillation circuit section 16 at an oscillation frequency that is inversely proportional to the ambient temperature of the CCFL 20, so that FIG. As shown
In the initial stage of activation, the CCFL 20 is lit at a frequency higher than that in a stable lighting state with stable brightness. As a result, FIG.
As shown in (a), a stable lighting state with stable brightness is reached in a shorter time than when lighting is started at a fixed frequency. After that, the DC-AC inverter for cold cathode tubes, due to the action of the negative feedback, lights the CCFL 20 at a frequency lower than that at the time of startup because the ambient temperature of the CCFL 20 becomes high. It is possible to illuminate with a stable brightness without extremely brightening as in the case (when illuminating is continued with the high frequency at the initial stage of lighting initiation).
【００１６】そして、この冷陰極管用ＤＣ−ＡＣインバ
ータは、図３に示した液晶表示モジュールにおいて、冷
陰極管用ＤＣ−ＡＣインバータ１４として用いられるこ
とになり、使用開始直後から液晶表示パネル１の輝度を
安定させて見やすい画面を得ることができる。The DC-AC inverter for cold cathode fluorescent lamps is used as the DC-AC inverter 14 for cold cathode fluorescent lamps in the liquid crystal display module shown in FIG. 3, and the brightness of the liquid crystal display panel 1 immediately after the start of use. It is possible to stabilize and obtain a screen that is easy to see.
【００１７】[0017]
【発明の効果】以上のように、この発明の冷陰極管用Ｄ
Ｃ−ＡＣインバータによれば、温度センサ部と発振周波
数可変制御回路部とを設けてインバータ本体の発振周波
数を冷陰極管の周囲温度に反比例するように変化させる
ようにしたので、起動時から輝度安定状態まで速くスム
ーズに安定した輝度で点灯させることができる。As described above, the D for cold cathode fluorescent lamp of the present invention
According to the C-AC inverter, the temperature sensor unit and the oscillation frequency variable control circuit unit are provided so that the oscillation frequency of the inverter body is changed so as to be inversely proportional to the ambient temperature of the cold cathode tube. It can be lit up quickly and smoothly to a stable state with stable brightness.
【００１８】また、液晶表示モジュールは、上記の冷陰
極管用ＤＣ−ＡＣインバータを備えたことにより、使用
開始直後から液晶表示パネルの輝度を安定させて見やす
い画面を得ることができる。Further, since the liquid crystal display module is provided with the DC-AC inverter for the cold cathode tube, the brightness of the liquid crystal display panel can be stabilized immediately after the start of use and an easy-to-see screen can be obtained.
【図１】この発明の実施の形態における冷陰極管用ＤＣ
−ＡＣインバータの構成を示す回路ブロック図である。FIG. 1 is a DC for a cold cathode tube according to an embodiment of the present invention.
FIG. 3 is a circuit block diagram showing a configuration of an AC inverter.
【図２】（ａ）は実施の形態および従来例のＣＣＦＬの
輝度の特性図、（ｂ）は実施の形態および従来例の発振
回路部の発振周波数の特性図である。FIG. 2A is a luminance characteristic diagram of CCFLs of the embodiment and the conventional example, and FIG. 2B is an oscillation frequency characteristic diagram of the oscillation circuit section of the embodiment and the conventional example.
【図３】従来の液晶表示モジュールの構成を示す概略図
である。FIG. 3 is a schematic diagram showing a configuration of a conventional liquid crystal display module.
【図４】従来の冷陰極管用ＤＣ−ＡＣインバータの構成
を示す回路ブロック図である。FIG. 4 is a circuit block diagram showing a configuration of a conventional DC-AC inverter for cold cathode tubes.
１１ 液晶表示パネル １２ 駆動回路部 １３ バックライトユニット １４ 冷陰極管用ＤＣ−ＡＣインバータ １５ 入力回路部 １６ 発振回路部 １７ 昇圧回路部 １８ 温度センサ部 １９ 発振周波数可変制御回路部 ２０ ＣＣＦＬ ２１ インバータ本体 11 Liquid Crystal Display Panel 12 Drive Circuit Section 13 Backlight Unit 14 Cold-Cathode DC-AC Inverter 15 Input Circuit Section 16 Oscillation Circuit Section 17 Booster Circuit Section 18 Temperature Sensor Section 19 Oscillation Frequency Variable Control Circuit Section 20 CCFL 21 Inverter Main Body
Claims (2)
冷陰極管へ供給するインバータ本体と、冷陰極管の周囲
温度を検知する温度センサ部と、この温度センサ部の出
力に基づき前記インバータ本体の発振周波数を前記冷陰
極管の周囲温度に反比例するように変化させる発振周波
数可変制御回路部とを備えた冷陰極管用ＤＣ−ＡＣイン
バータ。1. An inverter main body for converting a DC power supply voltage into an AC power supply voltage and supplying it to a cold cathode tube, a temperature sensor section for detecting an ambient temperature of the cold cathode tube, and the inverter based on an output of the temperature sensor section. A DC-AC inverter for a cold cathode tube, comprising: an oscillation frequency variable control circuit section for changing the oscillation frequency of the main body so as to be inversely proportional to the ambient temperature of the cold cathode tube.
ンバータを備えた液晶表示モジュール。2. A liquid crystal display module comprising the DC-AC inverter for a cold cathode tube according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7260134A JPH09102397A (en) | 1995-10-06 | 1995-10-06 | DC-AC inverter for cold cathode tube and liquid crystal display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7260134A JPH09102397A (en) | 1995-10-06 | 1995-10-06 | DC-AC inverter for cold cathode tube and liquid crystal display module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09102397A true JPH09102397A (en) | 1997-04-15 |
Family
ID=17343784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7260134A Pending JPH09102397A (en) | 1995-10-06 | 1995-10-06 | DC-AC inverter for cold cathode tube and liquid crystal display module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09102397A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100361192B1 (en) * | 1999-03-30 | 2002-11-18 | 가부시끼가이샤 무라따 세이사꾸쇼 | Control apparatus capable of improving a rise time characteristic of a light source |
| JP2004222489A (en) * | 2002-12-25 | 2004-08-05 | Rohm Co Ltd | Parallel operating system of ac-dc converter and its controller ic |
| US7034467B1 (en) | 2004-10-01 | 2006-04-25 | Zippy Technology Corp. | Controller for suppressing temperature of screen |
| US7446489B2 (en) | 2003-03-14 | 2008-11-04 | Samsung Electronics Co., Ltd. | Apparatus and method of driving light source for display device |
-
1995
- 1995-10-06 JP JP7260134A patent/JPH09102397A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100361192B1 (en) * | 1999-03-30 | 2002-11-18 | 가부시끼가이샤 무라따 세이사꾸쇼 | Control apparatus capable of improving a rise time characteristic of a light source |
| JP2004222489A (en) * | 2002-12-25 | 2004-08-05 | Rohm Co Ltd | Parallel operating system of ac-dc converter and its controller ic |
| US7446489B2 (en) | 2003-03-14 | 2008-11-04 | Samsung Electronics Co., Ltd. | Apparatus and method of driving light source for display device |
| US7034467B1 (en) | 2004-10-01 | 2006-04-25 | Zippy Technology Corp. | Controller for suppressing temperature of screen |
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