JP2008268500A5 - - Google Patents

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JP2008268500A5
JP2008268500A5 JP2007110540A JP2007110540A JP2008268500A5 JP 2008268500 A5 JP2008268500 A5 JP 2008268500A5 JP 2007110540 A JP2007110540 A JP 2007110540A JP 2007110540 A JP2007110540 A JP 2007110540A JP 2008268500 A5 JP2008268500 A5 JP 2008268500A5
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average luminance
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映像信号を表示する表示部と、当該表示部の周囲の外光の照度を検出する外光検出部とを備えた映像表示装置であって、
前記外光検出部で検出された照度検出値を取得する取得手段と、
前記表示部に表示する映像信号のフレームデータ毎の平均輝度値を算出する算出手段と、
前記算出手段で算出される平均輝度値が低輝度となる低輝度映像信号及び高輝度となる高輝度映像信号を前記表示部にそれぞれ表示させる表示手段と、
前記表示手段によって前記低輝度映像信号及び前記高輝度映像信号をそれぞれ表示した際に前記取得手段で取得した照度検出値と、前記低輝度映像信号及び前記高輝度映像信号の平均輝度値とを用いて、前記表示部に映像を表示することで生じる反射光照度を決定する決定手段と、
前記反射光照度と前記平均輝度値とを用いて、前記表示部に表示する映像信号の表示輝度を低減させる補正制御を実行する制御手段と、を有し、
前記制御手段は、前記平均輝度値が第1の閾値よりも大きい場合であり、かつ前記反射光照度が大きい場合における前記表示輝度の低減度合いを、当該反射光照度が小さい場合における前記表示輝度の低減度合いに比べて大きくなるように補正制御を実行することを特徴とする映像表示装置。
A video display device comprising: a display unit that displays a video signal; and an external light detection unit that detects illuminance of external light around the display unit,
An acquisition means for acquiring an illuminance detection value detected by the external light detection unit;
Calculating means for calculating an average luminance value for each frame data of the video signal displayed on the display unit ;
Display means for causing the display unit to display a low-brightness video signal whose average brightness value calculated by the calculation means is low brightness and a high-brightness video signal whose brightness is high, respectively;
The illuminance detection value acquired by the acquisition unit when the low luminance video signal and the high luminance video signal are respectively displayed by the display unit, and the average luminance value of the low luminance video signal and the high luminance video signal are used. Te, determining means for determining the reflected light intensity caused by displaying an image on said display unit,
Control means for executing correction control for reducing display luminance of a video signal displayed on the display unit using the reflected light illuminance and the average luminance value;
The control means is a case in which the average luminance value is greater than a first threshold and the display luminance is reduced when the reflected light illuminance is large, and the display luminance reduction degree when the reflected light illuminance is small. A video display device , wherein correction control is executed so as to be larger than .
前記平均輝度値に基づいて、前記制御手段で利用される第1調整値をフレームデータ毎に生成する第1調整値生成手段と、
前記反射光照度に基づいて、前記制御手段で利用される第2調整値を生成する第2調整値生成手段と、を有し、
前記第1調整値は、前記平均輝度値が前記第1の閾値より大きい場合の、前記映像信号の表示輝度の低減率に相当するパラメータであり、
前記第2調整値は、前記反射光照度が第2の閾値より大きい場合に、前記低減率を調整するパラメータであり、
前記制御手段は、前記第1調整値前記第2調整値とを用いて映像信号の表示輝度の補正制御に用いる低減率を決定することを特徴とする請求項1に記載の映像表示装置。
First adjustment value generating means for generating, for each frame data, a first adjustment value used by the control means based on the average luminance value;
Second adjustment value generation means for generating a second adjustment value used by the control means based on the reflected light illuminance ,
The first adjustment value is a parameter corresponding to a display luminance reduction rate of the video signal when the average luminance value is larger than the first threshold value.
The second adjustment value is a parameter for adjusting the reduction rate when the reflected light illuminance is larger than a second threshold.
2. The video display device according to claim 1, wherein the control unit determines a reduction rate to be used for correction control of display luminance of the video signal, using the first adjustment value and the second adjustment value. .
前記第2調整値生成手段は、前記反射光照度を、前記外光検出部で検出された前記照度検出値から前記反射光照度を減じることで得られる環境光の照度で除した値に基づいて前記第2調整値を生成することを特徴とする請求項2に記載の映像表示装置。 The second adjustment value generating means, said reflected light intensity, on the basis of a value obtained by dividing the illuminance of the external light detection unit in said detected illuminance detected value the reflected light that in the resulting ambient light to reduce illumination from said The video display device according to claim 2, wherein the second adjustment value is generated. 映像信号を表示する表示部と、当該表示部の周囲の外光の照度を検出する外光検出部とを備えた映像表示装置であって、A video display device comprising: a display unit that displays a video signal; and an external light detection unit that detects illuminance of external light around the display unit,
前記外光検出部で検出された照度検出値を取得する取得手段と、An acquisition means for acquiring an illuminance detection value detected by the external light detection unit;
前記表示部に表示する映像信号のフレームデータ毎の平均輝度値を算出する第1の算出手段と、First calculating means for calculating an average luminance value for each frame data of the video signal to be displayed on the display unit;
前記平均輝度値と予め定められた閾値S3及び閾値S4(S3<S4)とを比較し、前記平均輝度値が閾値S3より小さい場合には、当該平均輝度値A1及び当該平均輝度値A1の映像信号を前記表示部に表示した際の照度検出値B1とを対応付けるとともに、前記平均輝度値が閾値S4より大きい場合には、当該平均輝度値A2及び当該平均輝度値A2の映像信号を前記表示部に表示した際の照度検出値B2とを対応付けて保持部に保持する判別手段と、The average luminance value is compared with a predetermined threshold value S3 and threshold value S4 (S3 <S4), and when the average luminance value is smaller than the threshold value S3, the average luminance value A1 and the image of the average luminance value A1 When the signal is displayed on the display unit and associated with the detected illuminance value B1, and the average luminance value is larger than the threshold value S4, the video signal of the average luminance value A2 and the average luminance value A2 is displayed on the display unit. A determination means for associating the detected illuminance value B2 when displayed on the holding unit with the holding unit;
前記保持部に保持された前記平均輝度値A1及び前記照度検出値B1の組と、前記平均輝度値A2及び前記照度検出値B2の組とを用いて、前記表示部に映像を表示することで生じる反射光照度CをBy displaying an image on the display unit using the set of the average luminance value A1 and the detected illuminance value B1 held in the holding unit and the set of the average luminance value A2 and the detected illuminance value B2. The reflected light illuminance C produced
C=(B2−B1)/(A2−A1)C = (B2-B1) / (A2-A1)
により求める第2の算出手段と、A second calculating means obtained by:
前記反射光照度Cと前記平均輝度値とを用いて、前記表示部に表示する映像信号の表示輝度を低減させる補正制御を実行する制御手段と、を有し、Control means for performing correction control for reducing display luminance of a video signal displayed on the display unit using the reflected light illuminance C and the average luminance value;
前記制御手段は、前記平均輝度値が第1の閾値よりも大きい場合であり、かつ前記反射光照度Cが大きい場合における前記表示輝度の低減度合いを、当該反射光照度Cが小さい場合における前記表示輝度の低減度合いに比べて大きくなるように補正制御を実行することを特徴とする映像表示装置。The control means is the case where the average luminance value is larger than the first threshold value and the degree of reduction of the display luminance when the reflected light illuminance C is large, and the display luminance when the reflected light illuminance C is small. A video display device that performs correction control so as to be larger than a reduction degree.
映像信号を表示する表示部と、当該表示部の周囲の外光の照度を検出する外光検出部とを備えた映像表示装置の制御方法であって、A control method for a video display device comprising: a display unit that displays a video signal; and an external light detection unit that detects the illuminance of external light around the display unit,
前記外光検出部で検出された照度検出値を取得する取得工程と、An acquisition step of acquiring an illuminance detection value detected by the external light detection unit;
前記表示部に表示する映像信号のフレームデータ毎の平均輝度値を算出する算出工程と、A calculation step of calculating an average luminance value for each frame data of the video signal displayed on the display unit;
前記算出工程で算出される平均輝度値が低輝度となる低輝度映像信号及び高輝度となる高輝度映像信号を前記表示部にそれぞれ表示させる表示工程と、A display step of causing the display unit to display a low luminance video signal whose average luminance value calculated in the calculation step is low luminance and a high luminance video signal which is high luminance, respectively,
前記表示工程によって前記低輝度映像信号及び前記高輝度映像信号をそれぞれ表示した際に前記取得工程で取得した照度検出値と、前記低輝度映像信号及び前記高輝度映像信号の平均輝度値とを用いて、前記表示部に映像を表示することで生じる反射光照度を決定する決定工程と、The illuminance detection value acquired in the acquisition step when the low luminance video signal and the high luminance video signal are respectively displayed in the display step, and the average luminance value of the low luminance video signal and the high luminance video signal are used. Determining a reflected light illuminance generated by displaying an image on the display unit;
前記反射光照度と前記平均輝度値とを用いて、前記表示部に表示する映像信号の表示輝度を低減させる補正制御を実行する制御工程と、を有し、Using the reflected light illuminance and the average luminance value, and performing a correction control to reduce the display luminance of the video signal displayed on the display unit, and
前記制御工程では、前記平均輝度値が第1の閾値よりも大きい場合であり、かつ前記反射光照度が大きい場合における前記表示輝度の低減度合いを、当該反射光照度が小さい場合における前記表示輝度の低減度合いに比べて大きくなるように補正制御を実行することを特徴とする映像表示装置の制御方法。In the control step, the display luminance is reduced when the average luminance value is larger than the first threshold and the reflected light illuminance is large, and the display luminance reduction degree when the reflected light illuminance is small. A control method for a video display device, wherein correction control is executed so as to be larger than.
前記平均輝度値に基づいて、前記制御手段で利用される第1調整値をフレームデータ毎に生成する第1調整値生成工程と、A first adjustment value generating step of generating, for each frame data, a first adjustment value used by the control unit based on the average luminance value;
前記反射光照度に基づいて、前記制御工程で利用される第2調整値を生成する第2調整値生成工程と、を有し、A second adjustment value generating step for generating a second adjustment value used in the control step based on the reflected light illuminance,
前記第1調整値は、前記平均輝度値が前記第1の閾値より大きい場合の、前記映像信号の表示輝度の低減率に相当するパラメータであり、The first adjustment value is a parameter corresponding to a display luminance reduction rate of the video signal when the average luminance value is larger than the first threshold value.
前記第2調整値は、前記反射光照度が第2の閾値より大きい場合に、前記低減率を調整するパラメータであり、The second adjustment value is a parameter for adjusting the reduction rate when the reflected light illuminance is larger than a second threshold.
前記制御工程では、前記第1調整値と前記第2調整値とを用いて、映像信号の表示輝度の補正制御に用いる低減率を決定することを特徴とする請求項5に記載の映像表示装置の制御方法。6. The video display device according to claim 5, wherein, in the control step, a reduction rate used for correction control of display luminance of the video signal is determined using the first adjustment value and the second adjustment value. Control method.
前記第2調整値生成工程では、前記反射光照度を、前記外光検出部で検出された前記照度検出値から前記反射光照度を減じることで得られる環境光の照度で除した値に基づいて、前記第2調整値を生成することを特徴とする請求項6に記載の映像表示装置の制御方法。In the second adjustment value generation step, based on a value obtained by dividing the reflected light illuminance by the illuminance of ambient light obtained by subtracting the reflected light illuminance from the illuminance detection value detected by the external light detection unit, The method of controlling a video display device according to claim 6, wherein the second adjustment value is generated. 映像信号を表示する表示部と、当該表示部の周囲の外光の照度を検出する外光検出部とを備えた映像表示装置の制御方法であって、A control method for a video display device comprising: a display unit that displays a video signal; and an external light detection unit that detects the illuminance of external light around the display unit,
前記外光検出部で検出された照度検出値を取得する取得工程と、An acquisition step of acquiring an illuminance detection value detected by the external light detection unit;
前記表示部に表示する映像信号のフレームデータ毎の平均輝度値を算出する第1の算出工程と、A first calculation step of calculating an average luminance value for each frame data of the video signal displayed on the display unit;
前記平均輝度値と予め定められた閾値S3及び閾値S4(S3<S4)とを比較し、前記平均輝度値が閾値S3より小さい場合には、当該平均輝度値A1及び当該平均輝度値A1の映像信号を前記表示部に表示した際の照度検出値B1とを対応付けるとともに、前記平均輝度値が閾値S4より大きい場合には、当該平均輝度値A2及び当該平均輝度値A2の映像信号を前記表示部に表示した際の照度検出値B2とを対応付けて保持部に保持する判別工程と、The average luminance value is compared with a predetermined threshold value S3 and threshold value S4 (S3 <S4), and when the average luminance value is smaller than the threshold value S3, the average luminance value A1 and the image of the average luminance value A1 When the signal is displayed on the display unit and associated with the detected illuminance value B1, and the average luminance value is larger than the threshold value S4, the video signal of the average luminance value A2 and the average luminance value A2 is displayed on the display unit. A determination step of associating and holding the detected illuminance value B2 at the time of display in the holding unit;
前記保持部に保持された前記平均輝度値A1及び前記照度検出値B1の組と、前記平均輝度値A2及び前記照度検出値B2の組とを用いて、前記表示部に映像を表示することで生じる反射光照度CをBy displaying an image on the display unit using the set of the average luminance value A1 and the illuminance detection value B1 held in the holding unit and the set of the average luminance value A2 and the illuminance detection value B2. The reflected light illuminance C produced
C=(B2−B1)/(A2−A1)C = (B2-B1) / (A2-A1)
により求める第2の算出工程と、A second calculation step determined by:
前記反射光照度Cと前記平均輝度値とを用いて、前記表示部に表示する映像信号の表示輝度を低減させる補正制御を実行する制御工程と、を有し、Using the reflected light illuminance C and the average luminance value, and performing a correction control for reducing the display luminance of the video signal displayed on the display unit,
前記制御工程では、前記平均輝度値が第1の閾値よりも大きい場合であり、かつ前記反射光照度Cが大きい場合における前記表示輝度の低減度合いを、当該反射光照度Cが小さい場合における前記表示輝度の低減度合いに比べて大きくなるように補正制御を実行することを特徴とする映像表示装置の制御方法。In the control step, the degree of reduction in the display luminance when the average luminance value is larger than the first threshold and the reflected light illuminance C is large is set to the display luminance when the reflected light illuminance C is small. A control method for a video display device, wherein correction control is executed so as to be larger than a reduction degree.
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