IMAGE DISPLAY APPARATUS
First Claim
1. An image display apparatus comprising:
- a plurality of pixels having an electron-emitting device and a light emitting region that emits light when an electron emitted from the electron-emitting device enters therein, respectively;
a spacer for maintaining a space between the electron-emitting device and the light emitting region;
a first conversion circuit for converting an image signal;
a second conversion circuit for converting output of the first conversion circuit;
a correction value calculation circuit for calculating a correction value on the basis of output of the second conversion circuit;
a correction value adjustment circuit for adjusting the correction value on the basis of output of the first conversion circuit and outputting the adjusted correction value; and
a correction value addition circuit for correcting output of the first conversion circuit by the adjusted correction value;
wherein the first conversion circuit performs conversion such that a linearity between output of the first conversion circuit and a luminance to be displayed becomes higher than a linearity between the image signal and the luminance to be displayed;
the second conversion circuit is a circuit such that a linearity between output of the second conversion circuit and the amount of electron to be emitted is higher than a linearity between output of the first conversion circuit and the amount of electron to be emitted;
the spacer is located on a position where an electron directed from a light emitting region of a first pixel toward a light emitting region of a second pixel is blocked;
the correction value calculation circuit calculates a correction value corresponding to the second pixel on the basis of the output corresponding to the first pixel in the output of the second conversion circuit; and
the correction value is a value that can reduce a difference between a luminance of the second pixel and a luminance of a pixel that is located separately from the spacer further than the second pixel.
1 Assignment
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Accused Products
Abstract
There is provided an image display apparatus having: display devices; a spacer; and a drive circuit. The drive circuit has a first correction circuit that corrects inputted data to make it linear with luminance and a second correction circuit. The second correction circuit has a calculation circuit for calculating an evaluation value and an adjustment circuit. The evaluation value relates to suppression effect that the spacer suppresses an influence on the light emission of a predetermined emitting region due to the inputted image data by driving non-corresponding display devices and is calculated by using the electric charge signal after converting a luminance signal into an electric charge signal. The adjustment circuit calculates an adjustment value that refers to a property of a phosphor based on the luminance signal and dynamically calculates the correction value by using the evaluation value and the adjustment value.
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Citations
12 Claims
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1. An image display apparatus comprising:
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a plurality of pixels having an electron-emitting device and a light emitting region that emits light when an electron emitted from the electron-emitting device enters therein, respectively; a spacer for maintaining a space between the electron-emitting device and the light emitting region; a first conversion circuit for converting an image signal; a second conversion circuit for converting output of the first conversion circuit; a correction value calculation circuit for calculating a correction value on the basis of output of the second conversion circuit; a correction value adjustment circuit for adjusting the correction value on the basis of output of the first conversion circuit and outputting the adjusted correction value; and a correction value addition circuit for correcting output of the first conversion circuit by the adjusted correction value; wherein the first conversion circuit performs conversion such that a linearity between output of the first conversion circuit and a luminance to be displayed becomes higher than a linearity between the image signal and the luminance to be displayed; the second conversion circuit is a circuit such that a linearity between output of the second conversion circuit and the amount of electron to be emitted is higher than a linearity between output of the first conversion circuit and the amount of electron to be emitted; the spacer is located on a position where an electron directed from a light emitting region of a first pixel toward a light emitting region of a second pixel is blocked; the correction value calculation circuit calculates a correction value corresponding to the second pixel on the basis of the output corresponding to the first pixel in the output of the second conversion circuit; and the correction value is a value that can reduce a difference between a luminance of the second pixel and a luminance of a pixel that is located separately from the spacer further than the second pixel.
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2. An image display apparatus comprising:
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a plurality of pixels having an electron-emitting device and a light emitting region that emits light when an electron emitted from the electron-emitting device enters therein, respectively; a first conversion circuit for converting an image signal; a second conversion circuit for converting output of the first conversion circuit; a correction value calculation circuit for calculating a correction value on the basis of output of the second conversion circuit; a correction value adjustment circuit for adjusting the correction value on the basis of output of the first conversion circuit and outputting the adjusted correction value; and a correction value addition circuit for correcting output of the first conversion circuit by the adjusted correction value; wherein the first conversion circuit performs correction such that a linearity between output of the first conversion circuit and a luminance to be displayed becomes higher than a linearity between the image signal and the luminance to be displayed; the second conversion circuit performs correction such that a linearity between output of the second conversion circuit and the amount of electron to be emitted becomes higher than a linearity between output of the first conversion circuit and the amount of electron to be emitted; the plurality of pixels includes a first pixel and a second pixel located in the vicinity of the first pixel, and a distance between the first pixel and the second pixel is one that a reflection electron from the first pixel reaches the second pixel; the correction value calculation circuit calculates a correction value corresponding to the second pixel on the basis of the output corresponding to the first pixel in the output of the second conversion circuit; and the correction value is a value that can correct increase of the luminance of the second pixel due to the light emission of the second pixel generated by the reflection electron from the first pixel.
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3. An image display apparatus comprising:
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a plurality of display devices having corresponding light emitting regions, respectively, and displaying an image by making the light emitting regions emit light; a spacer for preventing the light emission of the predetermined light emitting region caused by driving of a display device corresponding to the light emitting region other than a predetermined light emitting region; and a drive circuit for outputting a drive signal to drive the display device on the basis of the inputted image data; wherein the drive circuit has a first correction circuit for obtaining a luminance signal by correcting the inputted image data so as to be brought close to a signal that is linear with respect to the luminance, and a second correction circuit for outputting the corrected drive signal; the second correction circuit has an evaluation value calculation circuit for calculating an evaluation value that evaluates a suppression effect that the spacer suppresses an influence on the light emission of a predetermined light emitting region due to the inputted image data, the influence being caused by driving of the display device corresponding to the light emitting region other than the predetermined light emitting region, and an adjustment circuit; the evaluation value calculation circuit converts the luminance signal into an electric charge signal showing an electric charge amount that is necessary for obtaining a luminance that is designated by a luminance signal by correcting the luminance signal so as to be brought close to a signal that is linear with respect to the electric charge amount and then, calculates the evaluation value that evaluates the suppression effect by using the electric charge signal; and the adjustment circuit calculates an adjustment value that refers to a property of a phosphor of the display device on the basis of the luminance signal and dynamically calculates a correction value corresponding to the drive signal using the evaluation value and the adjustment value. - View Dependent Claims (4, 5, 6, 7)
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8. An image display apparatus comprising:
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a plurality of display devices having corresponding light emitting regions, respectively, and displaying an image by making the light emitting region emit light; a spacer for preventing the light emission of a predetermined light emitting region caused by driving of a display device corresponding to the light emitting region other than the predetermined light emitting region; and a drive circuit for outputting a drive signal to drive the display device on the basis of the inputted image data; wherein the drive circuit has a first correction circuit for obtaining an electric charge signal by correcting the inputted image data so as to be brought close to a signal that is linear with respect to the electric charge amount; and
a second correction circuit for outputting the corrected drive signal;the second correction circuit has a calculation circuit for calculating an evaluation value that evaluates a suppression effect that the spacer suppresses an influence on the light emission of a predetermined light emitting region due to the inputted image data, the influence being caused by driving of the display device corresponding to the light emitting region other than the predetermined light emitting region, and an adjustment circuit; the calculation circuit calculates the evaluation value that evaluates the suppression effect by using the electric charge signal; and the adjustment circuit converts the electric charge signal into a luminance signal by correcting the electric charge signal so as to be brought close to a signal that is linear with respect to the luminance, calculates an adjustment value that refers to a property of a phosphor of the display device on the basis of the luminance signal, and dynamically calculates a correction value corresponding to the drive signal using the evaluation value and the adjustment value. - View Dependent Claims (9, 10, 11, 12)
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Specification