Patent ID: 9035857
Filing Date: 2015-05-19
Classification: G09G

Abstract:
1. An image display device, comprising: a pixel circuit including a light-emitting element; a recognizing portion recognizing a predicted value of a parameter based on image data representing images to be displayed before the light-emitting element is driven by the image data, the parameter being generated in accordance with driving of the pixel circuit and including a current required for driving the pixel circuit and for the light-emitting element included in the pixel circuit emitting light; an obtaining portion obtaining an actually-measured value of the parameter associated with causing the light-emitting element to emit light in accordance with the image data, the actually-measured value of the parameter including a current consumed to drive the pixel circuit; a power supply portion applying a power supply voltage to the pixel circuit; a comparing portion comparing the predicted value calculated based on the image data and the actually-measured value including the current consumed to drive the pixel circuit with each other to determine if the actually-measured value falls outside a reference range that includes the predicted value with a certain margin; and a control portion supplying a control signal to the power supply portion in accordance with a comparison result of the comparing portion, wherein the control portion is configured to supply the control signal to increase/decrease the power supply voltage, without changing the image data, in response to determining that the actually-measured value including the current consumed to drive the pixel circuit falls outside the reference range so that the actually-measured value including the current consumed to drive the pixel circuit is in the reference range and to stop the increase/decrease of the power supply voltage in response to determining that the actually-measured value including the current consumed to drive the pixel circuit is in the reference range.