Image display apparatus and image display method
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Accused Products
Abstract
Provided are an image display apparatus and method capable of visually improving a sense of contrast by adjusting contrast and a light source to have correlation. A characteristics detection part 11 detects MAX, MIN, and APL of an input signal. A control data generation part 12 calculates Gain for amplifying a difference between MAX and MIN to a width of a dynamic range and Offset indicating the DC level to be shifted so that the input video signal amplified by Gain falls with in the output dynamic range of a DC level adjustment part 13B. A signal amplitude adjustment part 13A amplifies the input video signal with reference to APL and in accordance with Gain. The DC level adjustment part 13B shifts the DC level of the amplified input video signal in accordance with a value of Offset. A light source control part 16 controls a light source 18 so that a visual brightness level on a screen is equal to a brightness level of the input video signal.
59 Citations
52 Claims
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1-40. -40 (Cancelled)
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41. An image display apparatus displaying an image on a passive light modulation part including a light source, the apparatus comprising:
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a video signal input part inputting a video signal; and
a light source control part controlling a brightness of said light source, whereinsaid video signal input part and said light source control part are connected to each other via a high-pass filter. - View Dependent Claims (42)
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43. An image display apparatus displaying an image on a passive light modulation part including a light source, the apparatus comprising:
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a high-pass filter to which a signal for dynamically controlling a brightness of said light source is inputted;
an addition part adding a signal outputted from said high-pass filter to a reference light adjustment control signal generated based on the light-emitting efficiency of said light source; and
a light source control section controlling the brightness of said light source in accordance with a signal outputted from said addition part. - View Dependent Claims (44)
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45. An image display apparatus displaying an image on a passive light modulation part including a light source, the apparatus comprising:
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a high-pass filter to which a signal for controlling a brightness of said light source is inputted;
an addition part adding a reference light adjustment control signal with a fixed value to a signal outputted from said high-pass filter; and
a light source control section controlling the brightness of said light source in accordance with a signal outputted from said addition part, wherein said reference light adjustment control signal is determined such that when a signal identical to said reference light adjustment control signal is outputted from said addition part, the light-emitting efficiency of said light source becomes maximum. - View Dependent Claims (46)
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47. An image display method of displaying an image on a passive light modulation part including a light source, the method comprising:
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a video signal input step of inputting a video signal;
a light source control step of controlling a brightness of said light source, anda low frequency removing step of removing low frequency components, between said video signal input step and said light source control step. - View Dependent Claims (48)
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49. An image display method of displaying an image on a passive light modulation part including a light source, the method comprising:
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a low frequency removing step of removing low frequency components of a signal for dynamically controlling a brightness of said light source;
an addition step of adding a signal obtained as a result of said low frequency removing step to a reference light adjustment control signal generated based on the light-emitting efficiency of said light source; and
a light source control step of controlling the brightness of said light source in accordance with a signal obtained as a result of said addition step. - View Dependent Claims (50)
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51. An image display method of displaying an image on a passive light modulation part including a light source, the method comprising:
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a low frequency removing step of removing low frequency components of a signal for controlling a brightness of said light source;
an addition step of adding a reference light adjustment control signal with a fixed value to a signal obtained as a result of said low frequency removing step; and
a light source control step of controlling the brightness of said light source in accordance with a signal obtained as a result of said addition step, wherein said reference light adjustment control signal is determined such that when a signal identical to said reference light adjustment control signal is obtained as a result of said addition step, the light-emitting efficiency of said light source becomes maximum. - View Dependent Claims (52)
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Specification