JP2004246117A - Backlight device - Google Patents

Backlight device Download PDF

Info

Publication number
JP2004246117A
JP2004246117A JP2003036418A JP2003036418A JP2004246117A JP 2004246117 A JP2004246117 A JP 2004246117A JP 2003036418 A JP2003036418 A JP 2003036418A JP 2003036418 A JP2003036418 A JP 2003036418A JP 2004246117 A JP2004246117 A JP 2004246117A
Authority
JP
Japan
Prior art keywords
liquid crystal
backlight device
white led
luminance
backlight
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
Application number
JP2003036418A
Other languages
Japanese (ja)
Inventor
Takafumi Konishi
Hisakata Ota
久方 太田
啓文 小西
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Ind Co Ltd, 松下電器産業株式会社 filed Critical Matsushita Electric Ind Co Ltd
Priority to JP2003036418A priority Critical patent/JP2004246117A/en
Publication of JP2004246117A publication Critical patent/JP2004246117A/en
Application status is Pending legal-status Critical

Links

Images

Abstract

PROBLEM TO BE SOLVED: To provide a backlight device which improves the reproducibility of a display panel sharply and improves the picture quality of a liquid crystal display sharply by making it possible to change luminance for every arbitrary part of the screen.
SOLUTION: This backlight device which emits light and irradiates a display screen has a light emitting means equipped with one piece of a white LED (Light Emitting Diode) or a plurality of white LEDs and a luminous control means which individually controls luminance of the white LEDs, and the backlight device can change the luminance of the display screen for every arbitrary location.
COPYRIGHT: (C)2004,JPO&NCIPI

Description

【0001】 [0001]
【発明の属する技術分野】 BACKGROUND OF THE INVENTION
本発明は、液晶テレビジョン受像機、液晶ディスプレーを発光させる為に用いる液晶バックライト装置に関するものである。 The present invention relates to a liquid crystal television receiver, the present invention relates to a liquid crystal backlight device used in order to emit a liquid crystal display.
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
近年の表示装置、例えば液晶テレビジョン受像機や液晶ディスプレー等の液晶パネルを発光させる為に使用しているバックライト装置では、数本の蛍光管で画面の明るさを調整している為に、画面の局部的な面積の輝度を調整することは非常で白色や黒色の再現性が直視管などに比べて劣っている。 Recent display device, for example in a backlight device which is used to emit light of the liquid crystal panel such as a liquid crystal television receiver or a liquid crystal display, in order that adjusts screen brightness in fluorescent tubes several, local reproducibility of very white and black to adjust the brightness of the area of ​​the screen is inferior to such a direct view tube. 特開平5−236400号公報によれば、映像信号の振幅、コントラストを調整することで画面の輝度の調整をおこなっている。 According to JP-A-5-236400, the video signal amplitude is performed to adjust the brightness of the screen by adjusting the contrast. (特許文献1参照)。 (See Patent Document 1).
【0003】 [0003]
また、特開平11―223805号公報において白色LEDを用いたバックライトシステムがあるが、この手法では輝度ムラを防ぐことはできるが、逆に一部分の輝度を替えることは難しい。 Further, there is a backlight system using a white LED in JP-A 11-223805 discloses, but although it is possible to prevent the uneven brightness in this approach, it is difficult to replace the luminance of a portion in the opposite. (特許文献2参照)。 (See Patent Document 2).
【0004】 [0004]
【特許文献1】 [Patent Document 1]
特開平5−236400号公報【特許文献2】 JP 5-236400 [Patent Document 2]
特開平11―223805号公報【0005】 Japanese Unexamined Patent Publication No. 11-223805 [0005]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
近年の、液晶テレビジョン受像機や液晶ディスプレー等の液晶パネルを発光させる為に使用しているバックライト装置では、数本の蛍光管で画面の明るさを調整している為に、画面の輝度は前述の蛍光管の輝度に支配され、画面を任意の一部分だけ輝度調整することや、特定の部分を黒にすることは非常に困難となっている。 In recent years, a backlight apparatus using a liquid crystal panel such as a liquid crystal television receiver or a liquid crystal display to emit light, in order that adjusts screen brightness in fluorescent tubes several, screen brightness is governed by the intensity of the above fluorescent tube, and that only the luminance adjusting any portion of the screen, that certain parts black has become very difficult.
【0006】 [0006]
本発明では、液晶パネルなどの表示パネルに光を放射して発光させるためのバックライト装置に関するものであり、従来用いられていた蛍光管の代わりに白色LEDを用いることにより、容易に画面を任意の一部分ごとに輝度を変更することを可能とし、液晶の白色、黒色の再現性を大幅に向上し液晶ディスプレーの画質を大幅に向上するものである。 In the present invention relates to a backlight device for emitting light emits light to the display panel such as a liquid crystal panel, by using a white LED instead of conventionally used fluorescent tubes, easily any screen it possible to change the brightness for each part of, it is to significantly improve the image quality of liquid crystal displays significantly improved crystal white, the reproducibility of black.
【0007】 [0007]
【課題を解決するための手段】 In order to solve the problems]
本発明は上記目的を達成するために、液晶パネルを発光させるバックライト装置であって、複数の白色LEDを備え、白色LEDを1個もしくは複数発光させる発光装置と、複数の白色LEDの輝度を個別に制御する発光制御装置とを有し、表示パネルの輝度を任意の位置、画素単位ごとに制御することを特徴とするバックライト装置に関するものである。 For the present invention to achieve the above object, a backlight device for emitting the liquid crystal panel, comprising a plurality of white LED, a light emitting device for white LED is one or more light emitting, the luminance of the plurality of white LED and a light emission control device for individually controlling an arbitrary position the luminance of the display panel, to a backlight unit and controls for each pixel.
【0008】 [0008]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
本発明は前述した構成により表示パネルの輝度を任意の位置、画素単位ごとに制御することを特徴としたバックライト装置である。 The present invention is any position the luminance of the display panel by the above-described configuration, a backlight apparatus and controls each pixel.
【0009】 [0009]
(実施の形態1) (Embodiment 1)
図1に本発明の実施の形態例を示す。 Illustrating an embodiment of the present invention in FIG.
【0010】 [0010]
1は白色LED、2は白色LED1を複数まとめた白色LED群バックライト、3は白色LED発光制御装置である。 1 white LED, 2 white LED group backlight summarizing plurality white LED1, 3 is a white LED light emission control device. 例えば、白色LED発光制御装置3には映像信号を入力する。 For example, the white LED light emission control unit 3 inputs a video signal. 白色LED発光制御装置3は入力された映像信号をもとに、画面の輝度を検出し、その輝度に応じて、白色LED群バックライト2内の白色LED1のそれぞれの輝度を決定し、それに応じて白色LED1を発光させる。 Based on the video signal is a white LED light emission control device 3 is input, detects the brightness of the screen, depending on the brightness, to determine the respective brightness of the white LED1 white LED group backlight 2, accordingly emit white LED1 Te.
【0011】 [0011]
図4に白色LED群バックライト2の詳細な構成例を示す。 Figure 4 shows a detailed configuration example of the white LED group backlight 2. 1は白色LED、2は白色LED1を複数まとめた白色LED群バックライト、12はトランジスタである。 1 white LED, 2 white LED group backlight summarizing plurality white LED1, 12 a transistor. 例えば、白色LED発光制御装置3は、制御信号を白色LED群バックライト2に発信して、各々のトランジスタ12を制御することで白色LED群バックライト2内の白色LED1それぞれに流す電流量を決定し、白色LED1の輝度を調整する。 For example, white LED controller 3 determines a control signal to send to the white LED group backlight 2, the amount of current flowing in the white LED1 each white LED group backlight in 2 by controlling the respective transistor 12 and to adjust the brightness of the white LED1.
【0012】 [0012]
また、本実施の形態例ではトランジスタ12を例に用いて輝度調整を行ったがFETやその他集積回路やPWMなど他の手段を用いても良い。 Although conducted brightness adjustment using a transistor 12 as an example may be used other means such as a FET or other integrated circuits and PWM in this embodiment.
【0013】 [0013]
また、例えば、図5のようなレターボックスソース11を液晶パネルに表示する場合は、白色LED群バックライト2の無画部に相当する位置の白色LED1を消灯することで無画部の輝度を完全に黒にすることが可能となる。 Further, for example, the case where the letterbox source 11 is displayed on the liquid crystal panel, the luminance of the non-picture portion by turning off the white LED1 position corresponding to the non-image portion of the white LED group backlight 2 as shown in FIG. 5 completely it is possible to black. また逆に青空のような輝度が高い部分の白色LED1へ電流量を増加することで輝度を上げることができる。 Also it is possible to increase the brightness by the brightness, such as blue sky conversely increases the amount of current to the white LED1 high portion.
【0014】 [0014]
白色LED1は表示手段の各画素に応じた個数存在するものであっても、また複数の画素にひとつの割合で設けられるものであってもよい。 White LED1 is be those present number corresponding to each pixel of the display unit, or may be those provided in a ratio of one to a plurality of pixels.
【0015】 [0015]
以上のように、本実施の形態のバックライト装置では、入力された信号に応じて画面の画素ごと、または画面の領域ごとにバックライトから発せられる光を調整できるので、コントラストの良い映像を表示することを可能とすることを実現できる。 As described above, in the backlight device of this embodiment, it is possible to adjust the light emitted from the backlight for each pixel of the screen, or for each area of ​​the screen according to the input signal, displaying a good image contrast It can be achieved that makes it possible to.
【0016】 [0016]
(実施の形態2) (Embodiment 2)
図2に本発明の第2の実施の形態例を示す。 It shows a second embodiment of the present invention in FIG.
【0017】 [0017]
例えば、4は(実施の形態1)において説明したバックライト装置、5はチューナ、6は映像処理回路、7は音声処理回路、8はスピーカー、9は液晶パネルブロックである。 For example, 4 backlight device described in Embodiment 1, 5 tuner, 6 video processing circuit, 7 is a voice processing circuit, is 8 speaker 9 is a liquid crystal panel block. チューナ5は放送を受信して、映像信号を映像処理回路6に入力し、また、音声信号を音声処理回路7に入力する。 Tuner 5 receives the broadcast, and inputs a video signal to the video processing circuit 6, also inputs the audio signal to the audio processing circuit 7. 映像処理回路6は、請求項1にあげた液晶バックライト装置4と液晶パネルブロック9に入力し映像を表示する。 The video processing circuit 6 is input to the liquid crystal backlight device 4 and the liquid crystal panel block 9 mentioned in claim 1 for displaying an image. 音声処理装置はスピーカー8に信号を送信し音声を出力する。 Audio processing apparatus outputs the sound transmitting signals to the speaker 8.
【0018】 [0018]
映像処理回路6は、白色LED発光制御装置3と液晶パネルブロック9に映像信号を入力しパネルの開口率を決定する。 The video processing circuit 6 determines the opening ratio of the panel inputs a video signal to the white LED light emission control unit 3 and the liquid crystal panel block 9. 白色LED発光制御装置3は入力された映像信号をもとに、画面の輝度を検出し輝度に応じて、白色LED群バックライト2内の白色LED1、それぞれの輝度を決定し白色LED1それぞれを任意の輝度で発光させる。 Any white LED light emission control device 3 based on the inputted video signal, in accordance with the luminance detecting the brightness of the screen, the white LED1 white LED group backlight 2, to determine the respective luminance white LED1 respectively emit light at the luminance.
【0019】 [0019]
(実施の形態3) (Embodiment 3)
図3に本発明の第3の実施の形態例を示す。 It shows a third embodiment of the present invention in FIG.
【0020】 [0020]
4は(実施の形態1)にあげた液晶バックライト装置、6は映像処理回路、9は液晶パネルブロック、10は映像入力回路である。 4 a liquid crystal backlight device mentioned in Embodiment 1, 6 video processing circuit, 9 a liquid crystal panel block, 10 is a video input circuit.
【0021】 [0021]
映像入力回路10は、映像信号を外部から入力して映像処理回路6に入力する。 Video input circuit 10 is inputted to the video processing circuit 6 by inputting a video signal from the outside. 映像処理回路6は、(実施の形態1)または(実施の形態2)で説明したバックライト装置4や、液晶パネルブロック9に入力し映像を表示する。 The video processing circuit 6 displays an image type and the backlight device 4 described in Embodiment 1 or Embodiment 2, the liquid crystal panel block 9. この際、バックライト装置は、外部から入力された映像信号の輝度を検出し、画面の輝度に応じてバックライト装置を制御し、画像の各画素または各領域ごとに白色LEDの点灯、非点灯を制御、または各白色LEDの発光輝度を制御することせ、コントラストの良い、高画質な映像を提供することができる。 In this case, the backlight device detects the luminance of the video signal inputted from outside, and controls the backlight device according to the brightness of the screen, the lighting of the white LED for each pixel or each region of the image, unlit control, or cause it to control the light emission luminance of each white LED, it is possible to provide good contrast, a high-quality image.
【0022】 [0022]
【発明の効果】 【Effect of the invention】
以上のように本発明によれば、表示パネル、例えば液晶パネル、の任意の場所ごとに輝度を調整することが可能な液晶バックライト装置を提供することが可能となり、例えば、レターボックス信号の黒色部分の白色LEDをOFFすることで、黒の再現性をこれまでの液晶ディスプレーに比べ大幅に改善することを可能とし、逆に、空のような明るいソースについては白色LEDの輝度を高くすることで、白の再現性をこれまでの液晶ディスプレーに比べ大幅に改善することが可能となる。 According to the present invention as described above, the display panel, for example, a liquid crystal panel, it is possible to provide a liquid crystal backlight device capable of adjusting the luminance for each anywhere, for example, of the letterbox signal black by turning OFF the white LED portion, it possible to significantly improve compared to black reproducibility in the liquid crystal display of the past, on the contrary, increasing the brightness of the white LED brighter sources such as air in, it is possible to significantly improve compared the reproducibility of the white liquid crystal display of the past.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】本発明のバックライト装置の一構成例を示す図【図2】同バックライト装置を用いた液晶テレビジョン受像機の一構成例を示す図【図3】同バックライト装置を用いた液晶テレビジョン受像機の他の構成例を示す図【図4】同バックライト装置の白色LED群バックライトの一構成例を示す図【図5】同バックライト装置の白色LED群バックライトの他の構成例を示す図【符号の説明】 Use Figure 3 shows the backlight device according to an example of the configuration of a liquid crystal television receiver using Figure 2 shows the backlight device according to an example of the configuration of the backlight device of the present invention; FIG Figure 5 shows the white LED group backlight the backlight device according to an example of the configuration of a white LED group backlight other figures [4] showing a configuration example the backlight device of a liquid crystal television receiver had It shows another configuration example eXPLANATION oF REFERENCE nUMERALS
1 白色LED 1 white LED
2 白色LED群バックライト3 白色LED発光制御装置4 請求項1にあげた液晶バックライト装置5 チューナ6 映像処理回路7 音声処理回路8 スピーカー9 液晶パネルブロック10 映像入力回路11 レターボックスソース12 トランジスタ 2 white LED groups backlight 3 white LED control device 4 liquid crystal backlight device 5 tuner 6 video processing circuit 7 audio processing circuit 8 speaker 9 LCD panel block 10 the video input circuit 11 letterbox source 12 transistors mentioned in claim 1

Claims (2)

  1. 発光して表示画面を照射するバックライト装置であって、白色LEDを1個もしくは複数個備える発光手段と、前記白色LEDの輝度を個別に発光制御する発光制御手段とを有し、前記表示画面の輝度を任意の場所ごとに変えることを特徴とするバックライト装置。 A backlight device for irradiating the display screen emission to have a light emitting device comprising one or a plurality of white LED, and a light emission control means for individually emitting control the brightness of the white LED, the display screen backlight apparatus characterized by changing the luminance for each desired location.
  2. 表示画面が液晶パネルであって、請求項1のバックライト装置によって前記液晶パネルの輝度を任意の場所ごとに変えることを特徴とする液晶テレビジョン受像機。 Display screen is a liquid crystal panel, liquid crystal television receiver, characterized in that changing the brightness of the liquid crystal panel for each anywhere by the backlight device according to claim 1.
JP2003036418A 2003-02-14 2003-02-14 Backlight device Pending JP2004246117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003036418A JP2004246117A (en) 2003-02-14 2003-02-14 Backlight device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003036418A JP2004246117A (en) 2003-02-14 2003-02-14 Backlight device

Publications (1)

Publication Number Publication Date
JP2004246117A true JP2004246117A (en) 2004-09-02

Family

ID=33021505

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003036418A Pending JP2004246117A (en) 2003-02-14 2003-02-14 Backlight device

Country Status (1)

Country Link
JP (1) JP2004246117A (en)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006080254A1 (en) * 2005-01-25 2006-08-03 Sharp Kabushiki Kaisha Display device, instrument panel, automatic vehicle, and method of driving display device
EP1717792A2 (en) 2005-04-26 2006-11-02 Samsung Electronics Co., Ltd. Backlight unit for dynamic images and display device employing the same
JP2007279395A (en) * 2006-04-06 2007-10-25 Fujifilm Corp Image illuminator, image display device and imaging apparatus
JP2008000519A (en) * 2006-06-26 2008-01-10 Olympia:Kk Game machine
JP2008006168A (en) * 2006-06-30 2008-01-17 Olympia:Kk Game machine
EP1936600A2 (en) * 2006-12-01 2008-06-25 Sony Corporation Apparatus and method for controlling backlight and liquid crystal display
EP1950730A2 (en) 2007-01-24 2008-07-30 Sony Corporation Backlight and liquid crystal display
WO2008095380A1 (en) * 2007-02-02 2008-08-14 Hong Kong Applied Science And Technology Research Institute Co. Ltd. Backlit display and backlight system thereof
US7447416B2 (en) 2005-03-23 2008-11-04 Samsung Electronics Co., Ltd. Light emitting assembly, backlight unit and display having the same
JP2008541141A (en) * 2005-04-30 2008-11-20 オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツングOsram Opto Semiconductors GmbH Light source device and display device for backlighting (back lighting) of display device
WO2009016912A1 (en) * 2007-07-27 2009-02-05 Sharp Kabushiki Kaisha Liquid crystal display device, television receiver, and illumination device
US7511435B2 (en) 2006-07-28 2009-03-31 Samsung Electronics Co., Ltd. Backlight unit and liquid crystal display device having the same
CN100524445C (en) 2005-11-29 2009-08-05 索尼株式会社 Driving method for liquid crystal display device assembly
WO2009110513A1 (en) * 2008-03-07 2009-09-11 ミツミ電機株式会社 Liquid crystal backlight device
US7597451B2 (en) 2005-09-06 2009-10-06 Sharp Kabushiki Kaisha Backlight unit and liquid crystal display device
JP2009538457A (en) * 2006-06-15 2009-11-05 株式会社大宇エレクトロニクスDaewoo Electronics Corporation Liquid Crystal Display
WO2010024053A1 (en) * 2008-08-26 2010-03-04 シャープ株式会社 Image display device, television receiver, driving method for the image display device, and driving method for the television receiver
US7724316B2 (en) 2006-09-22 2010-05-25 Sony Corporation Backlight device and display apparatus
US7789527B2 (en) 2004-05-11 2010-09-07 Sony Corporation Backlight device and color liquid crystal display
US7808585B2 (en) 2004-07-15 2010-10-05 Sony Corporation Color filter and color LCD apparatus having red filter with a peak wavelength between 685 nm and 690 nm and a red light source having a peak wavelength of between 640 nm and 645 nm
WO2010122725A1 (en) 2009-04-24 2010-10-28 パナソニック株式会社 Display device and display control method
US7986293B2 (en) 2005-11-29 2011-07-26 Sony Corporation Driving method for liquid crystal display device assembly
JP2012094014A (en) * 2010-10-27 2012-05-17 Kyocera Corp Electronic apparatus, display control method and display control program
US8242982B2 (en) 2008-06-02 2012-08-14 Samsung Electronics Co., Ltd. Feedback control of lighting-emitting blocks in a display apparatus
RU2464605C1 (en) * 2008-08-30 2012-10-20 Шарп Кабусики Кайся Methods and systems for reducing colour shift caused by viewing angle
US8358386B2 (en) 2009-01-27 2013-01-22 Hitachi Displays, Ltd. Liquid crystal display device
US8619017B2 (en) 2006-06-02 2013-12-31 Sony Corporation Display device and display control method

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7789527B2 (en) 2004-05-11 2010-09-07 Sony Corporation Backlight device and color liquid crystal display
US7808585B2 (en) 2004-07-15 2010-10-05 Sony Corporation Color filter and color LCD apparatus having red filter with a peak wavelength between 685 nm and 690 nm and a red light source having a peak wavelength of between 640 nm and 645 nm
WO2006080254A1 (en) * 2005-01-25 2006-08-03 Sharp Kabushiki Kaisha Display device, instrument panel, automatic vehicle, and method of driving display device
EP2398016A1 (en) * 2005-01-25 2011-12-21 Sharp Kabushiki Kaisha Display device, instrument panel, automatic vehicle, and method of driving display device
US7956838B2 (en) 2005-01-25 2011-06-07 Sharp Kabushiki Kaisha Display device, instrument panel, automatic vehicle, and method of driving display device
JPWO2006080254A1 (en) * 2005-01-25 2008-06-19 シャープ株式会社 Display device, instrument panel, motor vehicle and driving method of display device
JP4536111B2 (en) * 2005-01-25 2010-09-01 シャープ株式会社 Display device, instrument panel, motor vehicle and driving method of display device
US7447416B2 (en) 2005-03-23 2008-11-04 Samsung Electronics Co., Ltd. Light emitting assembly, backlight unit and display having the same
US7537357B2 (en) 2005-04-26 2009-05-26 Samsung Electronics Co., Ltd. Backlight unit for dynamic image and display employing the same
EP1717792A2 (en) 2005-04-26 2006-11-02 Samsung Electronics Co., Ltd. Backlight unit for dynamic images and display device employing the same
US8807776B2 (en) 2005-04-26 2014-08-19 Samsung Electronics Co., Ltd. Backlight unit for dynamic image and display employing the same
KR101113236B1 (en) * 2005-04-26 2012-02-20 삼성전자주식회사 Backlight unit for dynamic image and display employing the same
JP2008541141A (en) * 2005-04-30 2008-11-20 オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツングOsram Opto Semiconductors GmbH Light source device and display device for backlighting (back lighting) of display device
US7597451B2 (en) 2005-09-06 2009-10-06 Sharp Kabushiki Kaisha Backlight unit and liquid crystal display device
US7986293B2 (en) 2005-11-29 2011-07-26 Sony Corporation Driving method for liquid crystal display device assembly
CN100524445C (en) 2005-11-29 2009-08-05 索尼株式会社 Driving method for liquid crystal display device assembly
JP2007279395A (en) * 2006-04-06 2007-10-25 Fujifilm Corp Image illuminator, image display device and imaging apparatus
US8619017B2 (en) 2006-06-02 2013-12-31 Sony Corporation Display device and display control method
JP2009538457A (en) * 2006-06-15 2009-11-05 株式会社大宇エレクトロニクスDaewoo Electronics Corporation Liquid Crystal Display
JP2008000519A (en) * 2006-06-26 2008-01-10 Olympia:Kk Game machine
JP2008006168A (en) * 2006-06-30 2008-01-17 Olympia:Kk Game machine
US7888884B2 (en) 2006-07-28 2011-02-15 Samsung Electronics Co., Ltd. Backlight unit and liquid crystal display device having the same
US7511435B2 (en) 2006-07-28 2009-03-31 Samsung Electronics Co., Ltd. Backlight unit and liquid crystal display device having the same
US7724316B2 (en) 2006-09-22 2010-05-25 Sony Corporation Backlight device and display apparatus
EP1936600A3 (en) * 2006-12-01 2009-07-15 Sony Corporation Apparatus and method for controlling backlight and liquid crystal display
US8400392B2 (en) 2006-12-01 2013-03-19 Sony Corporation Apparatus and method for controlling backlight and liquid crystal display
EP1936600A2 (en) * 2006-12-01 2008-06-25 Sony Corporation Apparatus and method for controlling backlight and liquid crystal display
EP1950730A2 (en) 2007-01-24 2008-07-30 Sony Corporation Backlight and liquid crystal display
US9099045B2 (en) 2007-01-24 2015-08-04 Thomson Licensing Backlight apparatus, backlight controlling method and liquid crystal display apparatus
WO2008095380A1 (en) * 2007-02-02 2008-08-14 Hong Kong Applied Science And Technology Research Institute Co. Ltd. Backlit display and backlight system thereof
JP4964959B2 (en) * 2007-07-27 2012-07-04 シャープ株式会社 Liquid crystal display device, television receiver, and illumination device
WO2009016912A1 (en) * 2007-07-27 2009-02-05 Sharp Kabushiki Kaisha Liquid crystal display device, television receiver, and illumination device
US8179498B2 (en) 2007-07-27 2012-05-15 Sharp Kabushiki Kaisha Liquid crystal display device, television receiver, and lighting device
JP2009237540A (en) * 2008-03-07 2009-10-15 Atrc Corp Liquid crystal backlight device
US8482512B2 (en) 2008-03-07 2013-07-09 Mitsumi Electric Co., Ltd. Liquid crystal backlight apparatus
CN101965477A (en) * 2008-03-07 2011-02-02 三美电机株式会社;有限会社Atrc Liquid crystal backlight device
CN101965477B (en) 2008-03-07 2013-04-03 三美电机株式会社 Liquid crystal backlight device
WO2009110513A1 (en) * 2008-03-07 2009-09-11 ミツミ電機株式会社 Liquid crystal backlight device
US8242982B2 (en) 2008-06-02 2012-08-14 Samsung Electronics Co., Ltd. Feedback control of lighting-emitting blocks in a display apparatus
JPWO2010024053A1 (en) * 2008-08-26 2012-01-26 シャープ株式会社 Image display device
RU2470381C2 (en) * 2008-08-26 2012-12-20 Шарп Кабусики Кайся Image display device, television receiver, method of controlling image display device and method of controlling television receiver
WO2010024053A1 (en) * 2008-08-26 2010-03-04 シャープ株式会社 Image display device, television receiver, driving method for the image display device, and driving method for the television receiver
US8314767B2 (en) 2008-08-30 2012-11-20 Sharp Laboratories Of America, Inc. Methods and systems for reducing view-angle-induced color shift
RU2464605C1 (en) * 2008-08-30 2012-10-20 Шарп Кабусики Кайся Methods and systems for reducing colour shift caused by viewing angle
US8358386B2 (en) 2009-01-27 2013-01-22 Hitachi Displays, Ltd. Liquid crystal display device
US8933975B2 (en) 2009-04-24 2015-01-13 Panasonic Intellectual Property Management Co., Ltd. Display device and display control method
WO2010122725A1 (en) 2009-04-24 2010-10-28 パナソニック株式会社 Display device and display control method
JP2012094014A (en) * 2010-10-27 2012-05-17 Kyocera Corp Electronic apparatus, display control method and display control program

Similar Documents

Publication Publication Date Title
CA2594061C (en) Field sequential display of color images
US7595784B2 (en) Liquid crystal display apparatus with control of LCD and backlight corresponding to an image
JP4264558B2 (en) Backlight device, backlight driving method, and color image display device
US8264447B2 (en) Display apparatus and method for controlling a backlight with multiple light sources of a display unit
JP3927011B2 (en) Liquid crystal display device and its driving circuit
JP3909595B2 (en) Display device and dimming method thereof
CN100340903C (en) The liquid crystal display device
US8035603B2 (en) Illumination system and liquid crystal display
CN101669064B (en) Backlight device and liquid crystal display device incorporating the backlight device
JP2006251796A (en) Image display device with reduced flickering and blur
KR20110098903A (en) Display apparatus, luminance adjusting device, luminance adjusting method, and program
CN100487554C (en) Display device and projection display device
JP4299622B2 (en) Liquid crystal display device and driving method used for the liquid crystal display device
EP2175313A1 (en) Display device
US7566143B2 (en) Backlight apparatus and color image display apparatus
US20040227456A1 (en) Display apparatus
US8207953B2 (en) Backlight apparatus and display apparatus
CN100481189C (en) Apparatus and method for controlling power of a display device
CN101055374B (en) Backlight system, liquid crystal display including the same, and method of adjusting backlight
JP2008299145A (en) Display device and display method
KR100591386B1 (en) Illuminator, projection display device, and method for driving the same
KR101164245B1 (en) Light emitting element drive device and display system
EP0883103A1 (en) Direct view liquid crystal display with automatic colour adjustment
US20100225574A1 (en) Image display device and image display method
JP4643545B2 (en) Liquid crystal display device