Selective Reset Voltage Application for OLED Data Line Accuracy
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Solution Overview
Problem
In display devices, residual charges on data lines can cause diode-connected structures in OLED pixel circuits to switch off prematurely, leading to incorrect data voltage transmission and threshold voltage detection, resulting in display errors.
Innovation Solution
A display device driving method that determines and applies reset voltages to data lines based on comparison results of incoming data voltages, ensuring that pixel circuits receive accurate voltages and preventing switching off due to residual charges, thereby maintaining the conductive state of diode-connected structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If reset voltages are applied to all data lines before data voltage transmission, then display accuracy is improved, but power consumption increases and device complexity increases
Solution Approach 1:
The patent applies reset voltages selectively only to data lines that require resetting based on comparison results, rather than uniformly resetting all data lines. This localized approach maintains voltage transmission accuracy for affected lines while reducing unnecessary power consumption on lines that don't need resetting.
Solution Approach 2:
The patent performs comparison of incoming data voltages with reference voltages before data transmission, and applies reset voltages preliminarily to identified data lines before the actual data voltage is transmitted. This preliminary action prevents residual charge interference in advance, ensuring accurate voltage transmission without requiring post-correction.
2Measurement precision
If reset voltages are applied to all data lines before data voltage transmission, then display accuracy is improved, but device complexity increases
Solution Approach 1:
The patent implements selective resetting of data lines based on local conditions (comparison results of incoming voltages), rather than applying a uniform reset to all lines. This reduces the control complexity by only activating reset functions where needed, while still achieving accurate voltage transmission on affected lines.
Solution Approach 2:
The patent performs voltage comparison and determines reset requirements preliminarily before data transmission. This advance determination simplifies the control logic by pre-identifying which data lines need resetting, avoiding the need for complex real-time control decisions during data transmission.
3Use of energy by moving object
If selective reset voltages are applied based on comparison results, then power consumption is reduced, but measurement precision may be compromised
Solution Approach 1:
The patent performs comparison of incoming data voltages with reference voltages before transmission, and preliminarily identifies which data lines require reset voltages. This advance identification ensures that selective resetting is applied precisely to lines that need it, maintaining voltage transmission accuracy while avoiding unnecessary resetting of lines that don't require it, thus reducing power consumption.
Solution Approach 2:
The patent uses comparison results as feedback to determine which data lines require reset voltages. This feedback mechanism ensures that reset voltages are applied selectively based on actual conditions, maintaining voltage accuracy by targeting only affected lines while reducing overall power consumption compared to universal resetting.
Data Source
AI summary
A display device driving method, suitable for a driver circuit, includes the following steps: determining magnitude of a plurality of data voltages according to received display data, and the plurality of data voltages are configured to be transmitted to a plurality of pixel circuits via a plurality of data lines; comparing the magnitude of the plurality of data voltages to generate a comparison result; and before providing corresponding ones of the plurality of data voltages to a first pixel group arranged at an i-th row of the plurality of pixel circuits, providing a first reset voltage having a value determined according to the comparison result to the plurality of data lines, or providing a second reset voltage to m data lines selected according to the comparison result from the plurality of data lines, i is a positive integer, and m is an integer.