JP2006292863A - Liquid crystal display device and display method - Google Patents

Liquid crystal display device and display method Download PDF

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JP2006292863A
JP2006292863A JP2005110706A JP2005110706A JP2006292863A JP 2006292863 A JP2006292863 A JP 2006292863A JP 2005110706 A JP2005110706 A JP 2005110706A JP 2005110706 A JP2005110706 A JP 2005110706A JP 2006292863 A JP2006292863 A JP 2006292863A
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transmitted light
amount
liquid crystal
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Shiyoubou Chiyou
小▲忙▼ 張
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Sharp Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device and a display method that save electric power by dimming a back light in dark and light environments. <P>SOLUTION: The liquid crystal display device which displays video on a liquid crystal panel by limiting the quantity of transmitted light from a backlight source according to values of pixels is equipped with a means 1 of detecting quantities of transmitted light by pixels on the entire screen, a means 2 of calculating a maximum value among the detected quantities of transmitted light, a means 5 of scaling the quantities of transmitted light by the pixels of all images by regarding the maximum value of the detected quantity of transmitted light as a full scale, and a means 4 of dimming the backlight source so that when the pixel corresponding to the maximum value of the quantity of transmitted light is displayed, the light from the backlight source is all passed without being limited. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、液晶表示装置及び表示方法であり、特に液晶パネルに映像信号を表示する際に表示の信号値に応じてバックライトを調整して省電力を図る技術及び装置に関する。   The present invention relates to a liquid crystal display device and a display method, and more particularly to a technique and device for adjusting power consumption by displaying a backlight according to a display signal value when displaying a video signal on a liquid crystal panel.

液晶パネル自体は発光しないので、液晶パネルの背面にバックライトの光照射部を設ける。この光照射部は通常、蛍光灯が使用される。デジタル化した映像を液晶パネルに表示するとき、画素の値によってバックライトの透過光量を制御して映像の模様を作り出す。   Since the liquid crystal panel itself does not emit light, a backlight light irradiation unit is provided on the back surface of the liquid crystal panel. A fluorescent lamp is usually used for this light irradiation part. When a digitized image is displayed on a liquid crystal panel, the pattern of the image is created by controlling the amount of light transmitted through the backlight according to the pixel value.

液晶パネルに環境光を感知するセンサーを付けることが提案されている。暗い環境では画面が少々暗くても画面のシーンはよく見えるので、バックライトを減光させて、節電を図ることができる。   It has been proposed to attach a sensor for sensing ambient light to the liquid crystal panel. In a dark environment, the screen scene looks good even if the screen is a little dark, so you can save power by dimming the backlight.

最近、蛍光灯の代わりにＬＥＤをバックライトとして使用する商品がある。この場合はＲＧＢ（赤、緑、青）の３原色ＬＥＤを組み合わせ、白光を作り出す。他の原理は蛍光灯と同様である。   Recently, there are products that use LEDs as a backlight instead of fluorescent lamps. In this case, RGB (red, green, blue) three primary color LEDs are combined to produce white light. Other principles are the same as those of fluorescent lamps.

従来、感光センサーの信号に基づきバックライトを減光させることで、暗い環境での鑑賞効果に影響を及ばさなくて節電ができるが、それ以上の節電効果は望めない。また、明るい環境で鑑賞する場合は、バックライトの減光ができなく、省電力効果は得られない。   Conventionally, by dimming the backlight based on the signal of the photosensitive sensor, power can be saved without affecting the viewing effect in a dark environment, but no further power saving effect can be expected. Further, when viewing in a bright environment, the backlight cannot be dimmed, and a power saving effect cannot be obtained.

本発明は、従来の問題を解決するものであり、暗い環境でも、明るい環境でも、バックライトの減光を行い、省電力を可能とする液晶表示装置及び表示方法を提供することを目的とする。   The present invention solves the conventional problems, and an object of the present invention is to provide a liquid crystal display device and a display method that can reduce power consumption in a dark environment and a bright environment to save power. .

本発明において、液晶パネルの映像表示は、画素の値でバックライトを透過させて実現される。例えば、テレビ映像は動画像で、時間軸で流れるフレームと称する複数枚の静止画（画像）から構成される。時間軸の一瞬だけを考え、その時の画像においてフールスケールの画素値がなければ、全画面においてどの位置でもバックライトを全光量に通過させることがないことを意味する。   In the present invention, video display on the liquid crystal panel is realized by transmitting a backlight with pixel values. For example, a television image is a moving image and is composed of a plurality of still images (images) called frames that flow on the time axis. If only a moment on the time axis is considered and there is no full-scale pixel value in the image at that time, it means that the backlight does not pass through the entire light amount at any position on the entire screen.

全画面において画素の最大値はフールスケール未満の際に、最大値をフールスケールと見なして、画像の画素値をスケーリングする。スケーリング処理した画像の最大画素値はフールスケールになる。画像の表示効果を維持するために、バックライトを減光させる。このとき、減光量は画像の画素値をスケーリングした変更量と同じである。この処理によって、節電ができると同時に映像の写す効果を保つことができる。   When the maximum pixel value is less than the full scale on the entire screen, the pixel value of the image is scaled by regarding the maximum value as the full scale. The maximum pixel value of the scaled image becomes a full scale. To maintain the image display effect, the backlight is dimmed. At this time, the light reduction amount is the same as the change amount obtained by scaling the pixel value of the image. This process can save power and at the same time maintain the effect of image projection.

すなわち、本発明は、画素の値に応じてバックライト光源からの透過光量を制限して液晶パネルの映像表示を行う液晶表示装置において、画面全体における画素毎の透過光量を検出する透過光量検出手段と、検出した透過光量の最大値を算出する透過光量最大値算出手段と、検出した透過光量の最大値をフールスケールと見なして全画像の画素毎の透過光量をスケーリングするスケーリング手段と、透過光量の最大値の画素を表示する際にバックライト光源からの全光量を制限せずに通過させることとなるようバックライト光源を減光させる減光手段とを備える液晶表示装置である。   That is, the present invention provides a transmitted light amount detecting means for detecting a transmitted light amount for each pixel in the entire screen in a liquid crystal display device that displays an image on a liquid crystal panel by limiting a transmitted light amount from a backlight light source according to a pixel value. A transmitted light amount maximum value calculating means for calculating the maximum value of the detected transmitted light amount, a scaling means for scaling the transmitted light amount for each pixel of all images by regarding the detected maximum value of the transmitted light amount as a full scale, and the transmitted light amount And a dimming means for dimming the backlight light source so that the total amount of light from the backlight light source is allowed to pass through without limitation when displaying the maximum value pixel.

また、本発明は、画素の値に応じてバックライト光源からの透過光量を制限して液晶パネルの映像表示を行う液晶表示装置において、画面全体における画素毎の透過光量を検出する透過光量検出手段と、検出した透過光量の最大値を算出する透過光量最大値算出手段と、算出した透過光量の最大値をフールスケールと見なして全画像の画素毎の透過光量をスケーリングするスケーリング手段と、透過光量の最大値に所定の数を掛けた値の画素を表示する際にバックライト光源からの全光量を制限せずに通過させることとなるようバックライト光源を減光させる減光手段とを備える液晶表示装置である。   The present invention also provides a transmitted light amount detecting means for detecting a transmitted light amount for each pixel in the entire screen in a liquid crystal display device that displays an image on a liquid crystal panel by limiting a transmitted light amount from a backlight light source according to a pixel value. And a transmitted light maximum value calculating means for calculating the maximum value of the detected transmitted light quantity, a scaling means for scaling the transmitted light quantity for each pixel of all images by regarding the calculated maximum value of the transmitted light quantity as a full scale, and the transmitted light quantity A light-reducing means for dimming the backlight source so that the total amount of light from the backlight source is allowed to pass without limitation when displaying pixels having a value obtained by multiplying the maximum value by a predetermined number It is a display device.

そして、本発明は、前記透過光量検出手段は画素毎の３原色別に透過光量を検出し、前記透過光量最大値算出手段は検出した３原色すべての透過光量のうちから最大値を算出する液晶表示装置である。   According to the present invention, the transmitted light amount detecting means detects the transmitted light amount for each of the three primary colors for each pixel, and the transmitted light amount maximum value calculating means calculates the maximum value from the detected transmitted light amounts of all three primary colors. Device.

更に、本発明は、画素の値に応じてバックライト光源からの透過光量を制限して液晶パネルの映像表示を行う液晶表示装置の表示方法において、画面全体における画素毎の透過光量を検出し、検出した透過光量の最大値を算出し、検出した透過光量の最大値をフールスケールと見なして全画像の画素毎の透過光量をスケーリングし、透過光量の最大値の画素を表示する際にバックライト光源からの全光量を制限せずに通過させることとなるようバックライト光源を減光させる表示方法である。   Furthermore, the present invention detects a transmitted light amount for each pixel in the entire screen in a display method of a liquid crystal display device that displays an image on a liquid crystal panel by limiting a transmitted light amount from a backlight light source according to a pixel value, The maximum value of the detected transmitted light amount is calculated, the detected maximum value of the transmitted light amount is regarded as a full scale, the transmitted light amount is scaled for each pixel of all images, and the backlight is displayed when displaying the pixel of the maximum transmitted light amount. In this display method, the backlight light source is dimmed so that the total amount of light from the light source is allowed to pass through without restriction.

また、本発明は、画素の値に応じてバックライト光源からの透過光量を制限して液晶パネルの映像表示を行う液晶表示装置の表示方法において、画面全体における画素毎の透過光量を検出し、検出した透過光量の最大値を算出し、算出した透過光量の最大値をフールスケールと見なして全画像の画素毎の透過光量をスケーリングし、透過光量の最大値に所定の数を掛けた値の画素を表示する際にバックライト光源からの全光量を制限せずに通過させることとなるようバックライト光源を減光させる表示方法である。   In the display method of the liquid crystal display device that displays the image on the liquid crystal panel by limiting the amount of light transmitted from the backlight light source according to the value of the pixel, the present invention detects the amount of light transmitted for each pixel in the entire screen, The maximum value of the detected transmitted light amount is calculated, the calculated maximum value of the transmitted light amount is regarded as a full scale, the transmitted light amount for each pixel of all images is scaled, and the maximum value of the transmitted light amount is multiplied by a predetermined number. This is a display method in which the backlight light source is dimmed so that the total amount of light from the backlight light source is allowed to pass through without limitation when displaying pixels.

本発明によれば、画面にある最大値に基づき、バックライトを減光させ、減光のバックライトに合わせて画像信号を調整することで、減光前と同じ写り効果があらわれる。本発明の技術は、節電ができると同時に映像の写す効果を保つことができる。   According to the present invention, the same reflection effect as before the dimming can be obtained by dimming the backlight based on the maximum value on the screen and adjusting the image signal in accordance with the dimming backlight. The technology of the present invention can save power and at the same time maintain the effect of capturing images.

本発明を実施するための最良の形態を説明する。
本発明の液晶表示装置及び表示方法の実施例について、図面を用いて説明する。 The best mode for carrying out the present invention will be described.
Embodiments of a liquid crystal display device and a display method of the present invention will be described with reference to the drawings.

実施例１を説明する。まず、本発明の原理について、図１を用いて説明する。ここで、簡略のためモノクロ画像のケースで説明を行う。図１（ａ）は従来技術におけるバックライトの光量と画像の光量との関係を表す。バックライトの光量は１００％に対して、画像の最大画素値にあたる最大光量は７０％である。   Example 1 will be described. First, the principle of the present invention will be described with reference to FIG. Here, for the sake of simplicity, the description will be made in the case of a monochrome image. FIG. 1A shows the relationship between the light amount of the backlight and the light amount of the image in the prior art. The light amount of the backlight is 100%, and the maximum light amount corresponding to the maximum pixel value of the image is 70%.

図１（ｂ）は、本発明の原理を示しており、Ｌは減光前のバックライト光量（１００％）で、Ｌ１は減光後のバックライト光量（７０％）である。Ｇは減光後のバックライトで、図１（ａ）の画像を液晶パネルに映す際に得られる画像の光量である。Ｇから最大値７０％の画像光量は４９％まで下がったことが分かる。   FIG. 1B shows the principle of the present invention, where L is the amount of backlight before dimming (100%), and L1 is the amount of backlight after dimming (70%). G is a backlight after dimming, and is a light quantity of an image obtained when the image of FIG. 1A is projected on the liquid crystal panel. It can be seen from G that the amount of image light at the maximum value of 70% has dropped to 49%.

バックライトが減光後でも、減光前と同じ効果を液晶パネルに出すには、画像に減光係数で画像調整を行う必要がある。調整前の原画像をｇ、調整後の画像はｇ１と記して、式（１）で表すことができる。
ｇ１＝ｇ／ｋ （式１）
ここで、ｋは減光係数で、例の場合は０．７である。 Even when the backlight is dimmed, it is necessary to adjust the image with the dimming coefficient in order to produce the same effect as before the dimming on the liquid crystal panel. The original image before adjustment is denoted by g, and the image after adjustment is denoted by g1, and can be expressed by Expression (1).
g1 = g / k (Formula 1)
Here, k is a light attenuation coefficient, and is 0.7 in the example.

これで、減光後のバックライトＬ１で調整後の画像ｇ１を表示する時と、減光前のバックライトＬで原画像ｇを表示する時に同様な写り効果が得られる。   Thus, the same reflection effect can be obtained when the adjusted image g1 is displayed with the backlight L1 after dimming and when the original image g is displayed with the backlight L before dimming.

図２は本発明の第１の実施形態として、バックライト光源に蛍光を使う蛍光灯バックライトを示す。映像処理部１は、液晶パネルに表示したい画像３原色信号Ｒｉｎ，Ｇｉｎ，Ｂｉｎを出す。最大値検出部２は、３原色信号を同一視してその最大値を検出する。検出はフレーム単位で行う。検出の最大値結果Ｍａｘは１フレームを遅延させて、次のフレームに適用する。ここで、Ｍａｘは０−１の間の値で、式（１）のｋとして使う。調光部３は、Ｍａｘに基づき、光照射部４を制御して減光を行う。画像調整部５は、ｋ＝Ｍａｘとした式（１）で画像調整処理を施す。画像調整部５は、３原色で同じ係数で処理して、Ｒｏｕｔ，Ｇｏｕｔ，Ｂｏｕｔを液晶駆動部に出力する。液晶駆動部６は、画像のデジタル値を電圧に変えて液晶パネルの透過光量を制御して、画像の模様を作り出す。液晶パネル６は、減光したバックライトで調整した画像を表示する。   FIG. 2 shows a fluorescent lamp backlight using fluorescence as a backlight light source as a first embodiment of the present invention. The video processing unit 1 outputs image three primary color signals Rin, Gin, Bin to be displayed on the liquid crystal panel. The maximum value detection unit 2 identifies the three primary color signals and detects the maximum value. Detection is performed in units of frames. The maximum detection result Max is applied to the next frame by delaying one frame. Here, Max is a value between 0 and 1 and is used as k in equation (1). The dimmer 3 controls the light irradiator 4 to reduce light based on Max. The image adjustment unit 5 performs image adjustment processing according to Expression (1) where k = Max. The image adjustment unit 5 processes the three primary colors with the same coefficients, and outputs Rout, Gout, and Bout to the liquid crystal drive unit. The liquid crystal driving unit 6 changes the digital value of the image to a voltage and controls the amount of light transmitted through the liquid crystal panel to create an image pattern. The liquid crystal panel 6 displays an image adjusted with a dimmed backlight.

実施例２を説明する。図３は、バックライト光源に３原色の組み合わせ（例えば、ＬＥＤ）を使用した場合であり、本発明の第２の実施形態を示す。ここで、実施例１と大きな違いはＲＧＢの３原色を別々に対応するところにある。映像処理部１は、液晶パネルに表示したい画像３原色信号Ｒｉｎ，Ｇｉｎ，Ｂｉｎを出す。最大値検出部２は、３原色信号に別々でその最大値Ｒｍａｘ，Ｇｍａｘ，Ｂｍａｘを検出する。検出はフレーム単位で行う。検出の最大値結果Ｒｍａｘ，Ｇｍａｘ，Ｂｍａｘは１フレームを遅延させて、次のフレームに適用する。ここで、Ｒｍａｘ，Ｇｍａｘ，Ｂｍａｘは０−１の間の値で、それぞれは式（１）のｋとして使う。Ｒ調光部３ｒは、Ｒｍａｘに基づき、Ｒ光照射部４ｒを制御してＲ成分の減光を行う。Ｇ調光部３ｇは、Ｇｍａｘに基づき、Ｇ光照射部４ｇを制御してＧ成分の減光を行う。Ｂ調光部３ｂは、Ｂｍａｘに基づき、Ｂ光照射部４ｂを制御してＢ成分の減光を行う。Ｒ信号調整部５ｒは、ｋ＝Ｒｍａｘとした式（１）で画像のＲ成分に調整処理を施す。Ｇ信号調整部５ｇは、ｋ＝Ｇｍａｘとした式（１）で画像のＧ成分に調整処理を施す。Ｂ信号調整部５ｂは、ｋ＝Ｂｍａｘとした式（１）で画像のＢ成分に調整処理を施す。調整後の信号Ｒｏｕｔ，Ｇｏｕｔ，Ｂｏｕｔを液晶駆動部６に出力する。液晶駆動部６は、画像のデジタル値を電圧に変えて液晶パネルの透過光量を制御して、画像の模様を作り出す。液晶パネル７は、減光したバックライトで調整した画像を表示する。   A second embodiment will be described. FIG. 3 shows a case where a combination of three primary colors (for example, LEDs) is used for the backlight light source, and shows a second embodiment of the present invention. Here, the major difference from the first embodiment is that the three primary colors of RGB are handled separately. The video processing unit 1 outputs image three primary color signals Rin, Gin, Bin to be displayed on the liquid crystal panel. The maximum value detector 2 detects the maximum values Rmax, Gmax, and Bmax separately for the three primary color signals. Detection is performed in units of frames. The detection maximum value results Rmax, Gmax, and Bmax are delayed by one frame and applied to the next frame. Here, Rmax, Gmax, and Bmax are values between 0 and 1 and are used as k in equation (1). Based on Rmax, the R light control unit 3r controls the R light irradiation unit 4r to reduce the R component. Based on Gmax, the G light control unit 3g controls the G light irradiation unit 4g to reduce the G component. Based on Bmax, the B light control unit 3b controls the B light irradiation unit 4b to reduce the B component. The R signal adjustment unit 5r performs adjustment processing on the R component of the image according to Equation (1) where k = Rmax. The G signal adjustment unit 5g performs adjustment processing on the G component of the image according to Expression (1) where k = Gmax. The B signal adjustment unit 5b performs adjustment processing on the B component of the image according to Expression (1) where k = Bmax. The adjusted signals Rout, Gout, and Bout are output to the liquid crystal driving unit 6. The liquid crystal driving unit 6 changes the digital value of the image to a voltage and controls the amount of light transmitted through the liquid crystal panel to create an image pattern. The liquid crystal panel 7 displays an image adjusted with a dimmed backlight.

実施例では減光量は画素の最大値を使用しているが、最大値でなくでも実現できる。例えば、視覚効果（画質）を重視する場合に、バックライトの減光は最大値までしなくでも良い。また、節電を重視する場合には最大値以下に下げても良い。最大値に所定の数を掛けた値を最大値の代わりとするものであり、所定の数は、例えば１．４〜０．７の範囲の数とすることができる。   In the embodiment, the maximum amount of pixel is used for the light reduction amount, but it can be realized even if it is not the maximum value. For example, when the visual effect (image quality) is important, the backlight dimming need not be up to the maximum value. Moreover, when importance is attached to power saving, it may be lowered to a maximum value or less. A value obtained by multiplying the maximum value by a predetermined number is used instead of the maximum value, and the predetermined number can be a number in the range of 1.4 to 0.7, for example.

本発明の原理の説明図。FIG. 2 is an explanatory diagram of the principle of the present invention. 蛍光灯バックライトを使用する実施例１の説明図。Explanatory drawing of Example 1 which uses a fluorescent lamp backlight. ＲＧＢ３原色の組み合わせを用いるバックライトを使用する実施例２の説明図。Explanatory drawing of Example 2 which uses the backlight using the combination of RGB3 primary colors.

符号の説明Explanation of symbols

１ 映像処理部
２ 最大値検出部
３、３ｒ、３ｇ、３ｂ 調光部
４、４ｒ、４ｇ、４ｂ 光照射部
５、５ｒ、５ｇ、５ｂ 画像調整部
６ 液晶駆動部
７ 液晶パネル DESCRIPTION OF SYMBOLS 1 Image processing part 2 Maximum value detection part 3, 3r, 3g, 3b Light control part 4, 4r, 4g, 4b Light irradiation part 5, 5r, 5g, 5b Image adjustment part 6 Liquid crystal drive part 7 Liquid crystal panel

Claims (5)

画素の値に応じてバックライト光源からの透過光量を制限して液晶パネルの映像表示を行う液晶表示装置において、
画面全体における画素毎の透過光量を検出する透過光量検出手段と、検出した透過光量の最大値を算出する透過光量最大値算出手段と、検出した透過光量の最大値をフールスケールと見なして全画像の画素毎の透過光量をスケーリングするスケーリング手段と、透過光量の最大値の画素を表示する際にバックライト光源からの全光量を制限せずに通過させることとなるようバックライト光源を減光させる減光手段とを備えることを特徴とする液晶表示装置。 In a liquid crystal display device that displays an image on a liquid crystal panel by limiting the amount of light transmitted from a backlight light source according to the value of a pixel,
Transmitted light amount detection means for detecting the transmitted light amount for each pixel in the entire screen, transmitted light amount maximum value calculating means for calculating the maximum value of the detected transmitted light amount, and the detected maximum value of transmitted light amount as a full scale for all images A scaling means that scales the amount of transmitted light for each pixel, and dimming the backlight light source so that the total amount of light from the backlight light source can be passed without restriction when displaying the pixel with the maximum transmitted light amount A liquid crystal display device comprising: a dimming unit. 画素の値に応じてバックライト光源からの透過光量を制限して液晶パネルの映像表示を行う液晶表示装置において、
画面全体における画素毎の透過光量を検出する透過光量検出手段と、検出した透過光量の最大値を算出する透過光量最大値算出手段と、算出した透過光量の最大値をフールスケールと見なして全画像の画素毎の透過光量をスケーリングするスケーリング手段と、透過光量の最大値に所定の数を掛けた値の画素を表示する際にバックライト光源からの全光量を制限せずに通過させることとなるようバックライト光源を減光させる減光手段とを備えることを特徴とする液晶表示装置。 In a liquid crystal display device that displays an image on a liquid crystal panel by limiting the amount of light transmitted from a backlight light source according to the value of a pixel,
Transmitted light amount detecting means for detecting the transmitted light amount for each pixel in the entire screen, transmitted light amount maximum value calculating means for calculating the maximum value of the detected transmitted light amount, and the calculated maximum value of the transmitted light amount as a full scale The scaling means for scaling the amount of transmitted light for each pixel and the total amount of light from the backlight light source are allowed to pass without limitation when displaying pixels having a value obtained by multiplying the maximum value of the transmitted light amount by a predetermined number. A liquid crystal display device comprising: a dimming means for dimming the backlight light source. 前記透過光量検出手段は画素毎の３原色別に透過光量を検出し、前記透過光量最大値算出手段は検出した３原色すべての透過光量のうちから最大値を算出する請求項１又は２に記載の液晶表示装置。   The transmitted light amount detection unit detects a transmitted light amount for each of the three primary colors of each pixel, and the transmitted light amount maximum value calculation unit calculates a maximum value from the transmitted light amounts of all the detected three primary colors. Liquid crystal display device. 画素の値に応じてバックライト光源からの透過光量を制限して液晶パネルの映像表示を行う液晶表示装置の表示方法において、
画面全体における画素毎の透過光量を検出し、検出した透過光量の最大値を算出し、検出した透過光量の最大値をフールスケールと見なして全画像の画素毎の透過光量をスケーリングし、透過光量の最大値の画素を表示する際にバックライト光源からの全光量を制限せずに通過させることとなるようバックライト光源を減光させることを特徴とする表示方法。 In a display method of a liquid crystal display device that displays an image on a liquid crystal panel by limiting the amount of light transmitted from a backlight light source according to the value of a pixel,
Detects the transmitted light amount for each pixel in the entire screen, calculates the maximum value of the detected transmitted light amount, regards the detected maximum transmitted light amount as a full scale, scales the transmitted light amount for each pixel of all images, and transmits the transmitted light amount A display method characterized by dimming the backlight light source so that the total amount of light from the backlight light source is allowed to pass through without limitation when displaying the pixel with the maximum value. 画素の値に応じてバックライト光源からの透過光量を制限して液晶パネルの映像表示を行う液晶表示装置の表示方法において、
画面全体における画素毎の透過光量を検出し、検出した透過光量の最大値を算出し、算出した透過光量の最大値をフールスケールと見なして全画像の画素毎の透過光量をスケーリングし、透過光量の最大値に所定の数を掛けた値の画素を表示する際にバックライト光源からの全光量を制限せずに通過させることとなるようバックライト光源を減光させることを特徴とする表示方法。

In a display method of a liquid crystal display device that displays an image on a liquid crystal panel by limiting the amount of light transmitted from a backlight light source according to the value of a pixel,
Detects the transmitted light amount of each pixel in the entire screen, calculates the maximum value of the detected transmitted light amount, regards the calculated maximum transmitted light amount as a full scale, scales the transmitted light amount of each pixel of all images, and transmits the transmitted light amount A display method characterized by dimming the backlight light source so that the total amount of light from the backlight light source is allowed to pass through without limiting when displaying pixels having a value obtained by multiplying the maximum value of the predetermined number by a predetermined number .

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010509628A (en) * 2006-11-09 2010-03-25 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Liquid crystal display system and method
JP2012039432A (en) * 2010-08-09 2012-02-23 Casio Comput Co Ltd Light source control device and program

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0564083A (en) * 1991-08-30 1993-03-12 Fuji Photo Film Co Ltd Solid-state electronic image pickup device
JPH11109317A (en) * 1997-09-30 1999-04-23 Sony Corp Liquid crystal display device
JP2001272956A (en) * 2000-03-27 2001-10-05 Canon Inc Liquid crystal display device and its driving method
JP2001343957A (en) * 2000-03-27 2001-12-14 Hitachi Ltd Liquid crystal display device
JP2002149121A (en) * 2000-11-08 2002-05-24 Nippon Hoso Kyokai <Nhk> Video signal processor for liquid crystal display
JP2002333858A (en) * 2001-05-10 2002-11-22 Sharp Corp Image display device and image reproducing method
JP2003099010A (en) * 2001-09-25 2003-04-04 Sharp Corp Device and method for displaying video
JP2003195835A (en) * 2001-12-28 2003-07-09 Matsushita Electric Ind Co Ltd Liquid crystal display device and driving method for the liquid crystal display device
JP2003259154A (en) * 2002-03-04 2003-09-12 Seiko Epson Corp Image processing system, projector, program, information storage medium, black-and-white expansion processing method
JP2003271111A (en) * 2002-03-19 2003-09-25 Matsushita Electric Ind Co Ltd Image display device
JP2004085961A (en) * 2002-08-28 2004-03-18 Seiko Epson Corp Display apparatus
JP2004245896A (en) * 2003-02-10 2004-09-02 Funai Electric Co Ltd Video display unit

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0564083A (en) * 1991-08-30 1993-03-12 Fuji Photo Film Co Ltd Solid-state electronic image pickup device
JPH11109317A (en) * 1997-09-30 1999-04-23 Sony Corp Liquid crystal display device
JP2001272956A (en) * 2000-03-27 2001-10-05 Canon Inc Liquid crystal display device and its driving method
JP2001343957A (en) * 2000-03-27 2001-12-14 Hitachi Ltd Liquid crystal display device
JP2002149121A (en) * 2000-11-08 2002-05-24 Nippon Hoso Kyokai <Nhk> Video signal processor for liquid crystal display
JP2002333858A (en) * 2001-05-10 2002-11-22 Sharp Corp Image display device and image reproducing method
JP2003099010A (en) * 2001-09-25 2003-04-04 Sharp Corp Device and method for displaying video
JP2003195835A (en) * 2001-12-28 2003-07-09 Matsushita Electric Ind Co Ltd Liquid crystal display device and driving method for the liquid crystal display device
JP2003259154A (en) * 2002-03-04 2003-09-12 Seiko Epson Corp Image processing system, projector, program, information storage medium, black-and-white expansion processing method
JP2003271111A (en) * 2002-03-19 2003-09-25 Matsushita Electric Ind Co Ltd Image display device
JP2004085961A (en) * 2002-08-28 2004-03-18 Seiko Epson Corp Display apparatus
JP2004245896A (en) * 2003-02-10 2004-09-02 Funai Electric Co Ltd Video display unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010509628A (en) * 2006-11-09 2010-03-25 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Liquid crystal display system and method
US9805666B2 (en) 2006-11-09 2017-10-31 Koninklijke Philips N.V. Liquid crystal display system and method
JP2012039432A (en) * 2010-08-09 2012-02-23 Casio Comput Co Ltd Light source control device and program

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