Display device and electronic apparatus
First Claim
1. A display device including a matrix arrangement of a plurality of pixels, comprising:
- a source driver;
a gate driver;
a video signal generating circuit comprising a level converter circuit; and
a pixel portion,wherein the display device displays at least one of a first image in accordance with a first display mode and a second image in accordance with a second display mode in the pixel portion,wherein the first display mode and the second display mode are switched in accordance with an intensity of outside light in such a manner that an analog signal is supplied to the source driver in the first display mode, while a digital signal is supplied to the source driver in the second display mode,wherein the video signal generating circuit is configured to supply the analog signal to the source driver by inputting a video signal to a D/A converter in the first display mode,wherein the video signal generating circuit is configured to supply the digital signal by supplying only a most significant bit of the video signal to the level converter circuit, andwherein the level converter circuit increases a potential level of the digital signal so as to correspond with a potential level of the analog signal.
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Accused Products
Abstract
To provide a display device whose display can be recognized even in dark places or under the strong outside light. The display device performs display by controlling the number of gray scales in accordance with the intensity of outside light, which means a display mode can be switched in accordance with the data to be displayed on the display screen. A video signal generation circuit is controlled in each display mode in such a manner that it directly outputs an input video signal with an analog value, outputs a signal with a binary digital value, or outputs a signal with a multivalued digital value. As a result, gray scales displayed in pixels are timely changed. Accordingly, clear images can be displayed while maintaining high visibility in various environments, in the wide range from, for example, dark places or indoors (e.g., under a fluorescent lighting) to outdoors (e.g., under the sunlight).
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Citations
50 Claims
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1. A display device including a matrix arrangement of a plurality of pixels, comprising:
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a source driver; a gate driver; a video signal generating circuit comprising a level converter circuit; and a pixel portion, wherein the display device displays at least one of a first image in accordance with a first display mode and a second image in accordance with a second display mode in the pixel portion, wherein the first display mode and the second display mode are switched in accordance with an intensity of outside light in such a manner that an analog signal is supplied to the source driver in the first display mode, while a digital signal is supplied to the source driver in the second display mode, wherein the video signal generating circuit is configured to supply the analog signal to the source driver by inputting a video signal to a D/A converter in the first display mode, wherein the video signal generating circuit is configured to supply the digital signal by supplying only a most significant bit of the video signal to the level converter circuit, and wherein the level converter circuit increases a potential level of the digital signal so as to correspond with a potential level of the analog signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A display device including a matrix arrangement of a plurality of pixels, comprising:
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a source driver; a gate driver; a video signal generating circuit comprising a level converter circuit; and a pixel portion, wherein the display device displays at least one of a first image in accordance with a first display mode and a second image in accordance with a second display mode in the pixel portion, wherein the first display mode and the second display mode are switched in accordance with an intensity of outside light in such a manner that an analog signal is supplied to the source driver to be supplied to the pixel portion in the first display mode, while a digital signal is supplied to the source driver to be supplied to the pixel portion in the second display mode, wherein the video signal generating circuit is configured to supply the analog signal to the source driver by inputting a video signal to a D/A converter in the first display mode, wherein the video signal generating circuit is configured to supply the digital signal by supplying only a most significant bit of the video signal to the level converter circuit, and wherein the level converter circuit increases a potential level of the digital signal so as to correspond with a potential level of the analog signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A display device including a matrix arrangement of a plurality of pixels, comprising:
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a source driver; a gate driver; a video signal generating circuit comprising a level converter circuit; and a pixel portion, wherein the display device displays at least one of a first image in accordance with a first display mode and a second image in accordance with a second display mode in the pixel portion, wherein the video signal generating circuit is configured to supply an analog signal to the source driver by inputting a video signal to a D/A converter in the first display mode, wherein the video signal generating circuit is configured to supply the analog signal to the source driver by inputting a video signal to a D/A converter in the first display mode, wherein the video signal generating circuit is configured to supply the digital signal by supplying only a most significant bit of the video signal to the level converter circuit, wherein the level converter circuit increases a potential level of the digital signal so as to correspond with a potential level of the analog signal, and wherein the first display mode and the second display mode are switched in accordance with an intensity of outside light. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A display device including a matrix arrangement of a plurality of pixels, comprising:
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a source driver; a gate driver; a video signal generating circuit comprising a level converter circuit; and a pixel portion, wherein the display device displays at least one of a first image in accordance with a first display mode and a second image in accordance with a second display mode in the pixel portion, wherein the video signal generating circuit is configured to supply the analog signal to the source driver by inputting a video signal to a D/A converter in the first display mode, wherein the video signal generating circuit is configured to supply the digital signal by supplying only a most significant bit of the video signal to the level converter circuit, wherein the level converter circuit increases a potential level of the digital signal so as to correspond with a potential level of the analog signal, and wherein the first display mode and the second display mode are switched in accordance with an intensity of outside light. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A driving method of a display device including a matrix arrangement of a plurality of pixels, a source driver, and a gate driver, comprising the steps of:
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switching between a first display mode and a second display mode in accordance with an intensity of outside light; supplying an analog signal to the source driver by inputting a video signal to a D/A converter in the first display mode; and supplying a digital signal to the source driver by supplying only a most significant bit of the video signal to a level converter circuit, wherein the level converter circuit increase a potential level of the digital signal so as to correspond with a potential level of the analog signal. - View Dependent Claims (38, 39, 40, 41, 42, 43)
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44. A driving method of a display device including a matrix arrangement of a plurality of pixels in a pixel portion, a source driver, and a gate driver, comprising the steps of:
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switching between a first display mode and a second display mode in accordance with an intensity of outside light; supplying an analog signal to the source driver to be supplied to the pixel portion by inputting a video signal to a D/A converter in the first display mode; and supplying a digital signal to the source driver to be supplied to the pixel portion by supplying only a most significant bit of the video signal to a level converter circuit, wherein the level converter circuit increase a potential level of the digital signal so as to correspond with a potential level of the analog signal. - View Dependent Claims (45, 46, 47, 48, 49, 50)
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Specification