Display device comprising grayscale conversion portion and display portion
First Claim
Patent Images
1. A display device comprising:
- a grayscale conversion portion; and
a display portion including a plurality of pixels provided at a resolution of 80 ppi or more, one of the plurality of pixels comprising a light-emitting module capable of emitting light with a spectral line having a peak in which a half width of the peak is 60 nm or less and a transistor including an oxide semiconductor,wherein the light-emitting module includes an organic EL element and a color filter,wherein the grayscale conversion portion is configured to convert a first image signal inputted to the grayscale conversion portion into a second image signal and transmit the second image signal to the display portion,wherein the first image signal has p gray levels (p is a natural number and an even number),wherein the second image signal is subjected to a grayscale conversion processing in which each of q gray levels from the lowest gray level to the q-th gray level is further divided into 2r gray levels, andwherein q is greater than or equal to 1 and less than or equal to p/2 and r is greater than or equal to 1 and less than or equal to 20.
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Abstract
A dark portion in an image seen by a viewer is expressed more precisely, whereby the image given a greater sense of depth is displayed. A display device in which pixels each include a light-emitting module capable of emitting light having a spectral line half-width of less than or equal to 60 nm in a response time of less than or equal to 100 μs and are provided at a resolution of higher than or equal to 80 ppi; the NTSC ratio is higher than or equal to 80%; and the contrast ratio is higher than or equal to 500, is provided with a circuit converting an image signal having a given grayscale into an image signal capable of representing an image on the low luminance side by high-level grayscale.
154 Citations
30 Claims
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1. A display device comprising:
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a grayscale conversion portion; and a display portion including a plurality of pixels provided at a resolution of 80 ppi or more, one of the plurality of pixels comprising a light-emitting module capable of emitting light with a spectral line having a peak in which a half width of the peak is 60 nm or less and a transistor including an oxide semiconductor, wherein the light-emitting module includes an organic EL element and a color filter, wherein the grayscale conversion portion is configured to convert a first image signal inputted to the grayscale conversion portion into a second image signal and transmit the second image signal to the display portion, wherein the first image signal has p gray levels (p is a natural number and an even number), wherein the second image signal is subjected to a grayscale conversion processing in which each of q gray levels from the lowest gray level to the q-th gray level is further divided into 2r gray levels, and wherein q is greater than or equal to 1 and less than or equal to p/2 and r is greater than or equal to 1 and less than or equal to 20. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A display device comprising:
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a display portion comprising a plurality of pixels; one of the plurality of pixels comprising; a light-emitting module including an organic EL element and a color filter, the light-emitting module capable of emitting light with a spectral line having a peak in which a half width of the peak is 60 nm or less; and transistor including an oxide semiconductor, and a grayscale conversion portion, wherein the display portion has an NTSC ratio of 80% or higher and a contrast ratio of 500 or higher, wherein the plurality of pixels are provided at a resolution of 80 ppi or more, wherein the grayscale conversion portion is configured to convert a first image signal inputted to the grayscale conversion portion into a second image signal and transmit the second image signal to the display portion, wherein the first image signal has p gray levels (p is a natural number and an even number), wherein the second image signal is subjected to a grayscale conversion processing in which each of q gray levels from the lowest gray level to the q-th gray level is further divided into 2r gray levels, and wherein q is greater than or equal to 1 and less than or equal to p/2 and r is greater than or equal to 1 and less than or equal to 20. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A display device comprising:
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a grayscale conversion portion; and a display portion comprising a plurality of pixels, wherein one of the plurality of pixels comprising a first light-emitting module including a first organic EL element and a first color filter, a second light-emitting module including a second organic EL element and a second color filter, and a third light-emitting module including a third organic EL element and a third color filter, which are capable of emitting light with a spectral line having a peak in which a half width of the peak is 60 nm or less, and a transistor including an oxide semiconductor, wherein the display portion has an NTSC ratio of 80% or higher and a contrast ratio of 500 or higher, wherein the plurality of pixels are provided at a resolution of 80 ppi or more, wherein the grayscale conversion portion is configured to convert a first image signal inputted to the grayscale conversion portion into a second image signal and transmit the second image signal to the display portion, wherein the first image signal has p gray levels (p is a natural number and an even number), wherein the second image signal is subjected to a grayscale conversion processing in which each of q gray levels from the lowest gray level to the q-th gray level is further divided into 2r gray levels, and wherein q is greater than or equal to 1 and less than or equal to p/2 and r is greater than or equal to 1 and less than or equal to 20. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification