Display drive apparatus and display apparatus

Abstract

The present invention provides a display driving device for driving a display pixel having a light emitting element, applying a detection voltage based on a predetermined unit voltage to a display device having a light emitting element, and supplying a current flowing through a current flow path to the driving element of the light emitting element. The pixel detects a specific value corresponding to the element characteristics of the drive element based on the current value flowing through the current flow path of the drive element, and generates a grayscale voltage having a voltage value for causing the light emitting element to emit light at a luminance grayscale corresponding to the display data, Correct the generated grayscale voltage according to the detected specific value and the compensation voltage based on the above-mentioned unit voltage, generate the corrected grayscale voltage, provide it to the display pixel, and drive the light emitting element. The present invention can suppress insufficient writing, and compensate the characteristic change of the drive element of the display pixel, and make the light-emitting element perform light-emitting operation with the appropriate brightness gray scale corresponding to the display data for a long time.

Description

technical field [0001] The present invention relates to a display driving device and a driving method thereof, and a display device and a driving method thereof, in particular to a display driving device for driving a display pixel having a light-emitting element that emits light by supplying an electric current, and a display device having a plurality of the display pixels arranged therein. A display device for displaying image information on a panel and a driving method thereof. Background technique [0002] In recent years, as a next-generation display after the liquid crystal display device, there are many light-emitting elements such as organic electroluminescent elements (organic EL elements), inorganic electroluminescent elements (inorganic EL elements), or light-emitting diodes (LEDs) arranged in a matrix. The research and development of the self-luminous display device of the display panel formed by using the present invention is becoming more and more popular. [...

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Problems solved by technology

[0006] In the current designation method, even if the switching elements of the pixel driving circuit have characteristic changes and deviations, the influence on the driving current supplied to the light emitting elements can be suppressed, so it is possible to stably realize the appropriate luminance gray corresponding to the display data for a long period of time. However, when writing the grayscale current corresponding to the lowest or lower luminance display data into each display pixel, there are cases where the data line The charging time becomes longer, the writing operation takes a long time, and the writing operation cannot be fully performed within the preset writing time, so-called insufficient writing occurs, resulting in deterioration of display quality

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