Display Panel Sub-Pixel Leakage Control via Equivalent Resistance
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Solution Overview
Problem
In display technologies, the difference in turn-on voltages among light-emitting diodes can lead to display abnormalities, where a light-emitting diode with a higher turn-on voltage is inadvertently turned on, causing adjacent sub-pixels with lower turn-on voltages to also emit light, resulting in display non-uniformity and degraded performance.
Innovation Solution
A display panel design that includes a first and second type of sub-pixels with different turn-on voltages, utilizing first and second equivalent resistors between the anode of the light-emitting elements and the power supply line, where the resistance of the first equivalent resistor is larger than the second, ensuring that only the sub-pixel with the higher voltage is driven to emit light while maintaining the other below its turn-on voltage despite leakage currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light-emitting diode with higher turn-on voltage is turned on, then the intended sub-pixel emits light, but adjacent sub-pixels with lower turn-on voltages are also inadvertently activated causing display abnormality
Solution Approach 1:
The patent applies local quality by assigning different resistance values to different pixel circuits based on their specific turn-on voltage characteristics. Each pixel circuit is customized with an equivalent resistance tailored to its light-emitting element's turn-on voltage, creating a localized solution that addresses the specific needs of each sub-pixel while preventing unintended activation of adjacent sub-pixels with different voltage thresholds
Solution Approach 2:
The patent changes the electrical parameter (resistance) of the pixel circuits to control the voltage distribution across different sub-pixels. By adjusting the equivalent resistance values, the system modifies the voltage drop across each pixel circuit, ensuring that only sub-pixels with the appropriate turn-on voltage threshold are activated, thereby preventing display abnormalities caused by unintended light emission
2Ease of operation
If different turn-on voltages are used for different sub-pixels, then each sub-pixel can be controlled independently, but voltage leakage causes adjacent sub-pixels to activate unintentionally
Solution Approach 1:
The patent introduces an equivalent resistance as an intermediary element between the power supply and each light-emitting element. This resistance acts as a mediator that controls the voltage distribution, allowing independent control of each sub-pixel while simultaneously preventing voltage leakage from affecting adjacent sub-pixels. The intermediary resistance ensures that voltage is properly isolated and distributed according to each sub-pixel's specific requirements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively prevents the unintended activation of sub-pixels with lower turn-on voltages, thereby alleviating display abnormalities and improving the overall display effect by ensuring accurate and uniform lighting.
Implementation Method 1
there are a first equivalent resistor between the anode of the light-emitting element in each of the first type of sub-pixels and the first power supply line, and a second equivalent resistor between the anode of the light-emitting element in each of the second type of sub-pixels and the first power supply line, and resistance of the first equivalent resistor is larger than resistance of the second equivalent resistor
Data Source
AI summary
A display panel and a display device are provided. The resistance of a first equivalent resistor is set to be larger than the resistance of a second equivalent resistor so that voltage across the first equivalent resistor can be higher. In this way, when a second type of sub-pixel is driven to be lightened, and a first type of sub-pixel is driven not to be lightened, the first type of sub-pixel can be avoided from being lightened, due to the higher voltage across the first equivalent resistor despite leakages current, thus alleviating a display abnormality, and improving a display effect.