Circuit for driving self-luminous display device and method for driving the same
First Claim
1. A driving method of a self-luminous display apparatus having a plurality of self-luminous elements comprising each of pixels placed like a matrix in a pixel row direction and a pixel line direction and driving a display portion by passing a current between an anode and a cathode of each of the self-luminous elements and thereby emitting light from each of the pixels, the driving method comprising:
- a first process of acquiring a first amount of current to be passed between the anode and the cathode correspondingly to video data inputted from outside, and acquiring a predetermined single value as the first amount of current irrespective of a status of video data value distribution around the video data;
a second process of acquiring a second amount of current to be passed between the anode and the cathode correspondingly to the video data inputted from outside, where, regarding the second amount of current, a value, which has the first amount of current suppressed at a predetermined ratio according to the status of video data value distribution around the video data, is prepared, and of performing a processing in which the ratio of suppression is variable according to the status of video data value distribution, wherein the amount of current passing through each pixel line is controlled based on a result of the first or second processing instrument so as to emit light from the display portion.
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Accused Products
Abstract
An organic EL has a problem of element life. Causes of the element life include a temperature and an amount of current. As for a display using an organic EL element, light is emitted by using a current so that an amount of light emission of a screen is proportional to the amount of current passing through a device. Therefore, there are problems that an image of a large amount of light emission has a large current passing through the device causing deterioration of the element and that a high-capacity power supply is required in order to pass a maximum amount of current. As for the display using an organic EL element, the amount of light emission of the screen is proportional to the amount of current passing through the device. Therefore, the higher a maximum amount of light emission of the element is set, the larger the current becomes when all the elements of the screen emit maximum light. If the maximum amount of light emission of the element is suppressed, the entire screen becomes darker. For that reason, a drive to control the amount of light emission of the element is performed according to a display status of the screen.
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Citations
31 Claims
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1. A driving method of a self-luminous display apparatus having a plurality of self-luminous elements comprising each of pixels placed like a matrix in a pixel row direction and a pixel line direction and driving a display portion by passing a current between an anode and a cathode of each of the self-luminous elements and thereby emitting light from each of the pixels, the driving method comprising:
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a first process of acquiring a first amount of current to be passed between the anode and the cathode correspondingly to video data inputted from outside, and acquiring a predetermined single value as the first amount of current irrespective of a status of video data value distribution around the video data;
a second process of acquiring a second amount of current to be passed between the anode and the cathode correspondingly to the video data inputted from outside, where, regarding the second amount of current, a value, which has the first amount of current suppressed at a predetermined ratio according to the status of video data value distribution around the video data, is prepared, and of performing a processing in which the ratio of suppression is variable according to the status of video data value distribution, wherein the amount of current passing through each pixel line is controlled based on a result of the first or second processing instrument so as to emit light from the display portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A driving circuit of a self-luminous display apparatus having multiple self-luminous elements constituting each pixel placed like a matrix in a pixel row direction and a pixel line direction and driving a display portion by passing a current between an anode and a cathode of each self-luminous element and thereby emitting light from the pixels, the driving circuit comprising:
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a first light emitting instrument which has light emitted by each of the self-luminous elements at a first luminance preset correspondingly to image data inputted from outside;
a second light emitting instrument which has light emitted by each of the self-luminous elements at a second luminance adjusted to suppress the first luminance preset correspondingly to the image data inputted from outside in conformance with light emitting luminance distribution of the pixels in surroundings. - View Dependent Claims (25, 27, 29)
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20. A driving circuit of a self-luminous display apparatus having multiple self-luminous elements constituting each pixel placed like a matrix in a pixel row direction and a pixel line direction and driving a display portion by passing a current between an anode and a cathode of each self-luminous element and thereby emitting light from the pixels, the driving circuit comprising:
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a first processing instrument which performs processing of setting a first amount of current which should pass between the anode and the cathode correspondingly to image data inputted from outside and setting the first amount of current at a predetermined single value independently of an image data value distribution status in the vicinity of the image data; and
a second processing instrument which performs processing of setting a second amount of current which should pass between the anode and the cathode correspondingly to the image data inputted from outside and having one value of the second amount of current prepared which is a value of the first amount of current suppressed at a predetermined ratio according to the image data value distribution status in the vicinity of the image data, where the ratio of suppressing is variable according to the image data value distribution status; and
a control instrument which controls the amount of current passing through each of the pixel lines based on results of the first and second processing instrument. - View Dependent Claims (21, 22, 23, 24, 26, 28, 30)
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31. A driving method of a self-luminous display apparatus having a plurality of self-luminous elements comprising each of pixels placed in a matrix in a pixel row direction and a pixel line direction and driving a display portion by passing a current between an anode and a cathode of each of the self-luminous elements and thereby emitting light from each of the pixels, wherein:
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the light is emitted from the display portion by controlling an amount of current passing each of pixel lines based on results of (1) a first process of acquiring a first amount of current to be passed between the anode and the cathode correspondingly to video data inputted from outside, and acquiring a predetermined single value as the first amount of current irrespective of a status of video data value distribution around the video data, or (2) a second process of acquiring a second amount of current to be passed between the anode and the cathode correspondingly to the video data inputted from outside; and
preparing as the second amount of current a value having the first amount of current suppressed at a predetermined ratio according to the status of video data value distribution around the video data while the ratio of suppression being variable according to the status of video data value distribution, andin the case where the amount of current equivalent to displaying white is represented as 100, and if a gradation of a low-current region having the predetermined amount of current represented as 30 or less is given a positive number which is N1>
1, N2>
0 and N1≧
N2 as a coefficient, W as the predetermined amount of current, I org as a current value at the time, and T org as a light emitting period, the amount of current satisfying the current value of I org×
N1 and the light emitting period of T org×
1/N2 is applied instead of the predetermined amount of current.
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Specification