Flat Panel Display Charge Signal Control
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Solution Overview
Problem
Conventional flat panel displays face challenges in accurately representing gray scales due to indiscriminate application of pre-charge and discharge signals, leading to inefficient power consumption and suboptimal image representation.
Innovation Solution
A method for driving flat panel displays that involves generating and selectively applying charge signals, including a first voltage signal and a second current signal, to precisely match the data signals and account for parasitic capacitance, thereby optimizing the charging and discharging of sub-pixels for reduced power consumption and improved image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-charge signals are applied indiscriminately to all pixel parts, then sub-pixels can be preliminarily charged to ensure image representation, but power is wasted by supplying pre-charge signals to pixel parts that do not need them
Solution Approach 1:
The patent applies different pre-charge strategies to different pixel parts based on their specific needs. The data driver selectively supplies pre-charge signals only to pixel parts that require them, rather than uniformly to all pixel parts. This localized approach ensures reliable image representation where needed while avoiding unnecessary power consumption in pixel parts that already have sufficient charge.
Solution Approach 2:
The patent dynamically adjusts the pre-charge signal supply based on real-time conditions. The data driver determines which pixel parts need pre-charge signals by analyzing the relationship between data signals and current pixel states, and adjusts the pre-charge application accordingly. This dynamic approach optimizes the balance between image quality and power consumption.
2Reliability
If discharge signals are applied indiscriminately to pixel parts, then sub-pixels can be discharged to a predetermined level, but power is wasted by discharging pixel parts that do not need discharge
Solution Approach 1:
The patent implements selective discharge where the data driver identifies specific pixel parts that require discharge based on their individual charge states and incoming data signals. Instead of uniformly discharging all pixel parts, the system applies discharge signals only where necessary, maintaining reliable pixel charge level control while minimizing unnecessary power consumption.
Solution Approach 2:
The discharge operation is dynamically controlled based on the relationship between current pixel charges and upcoming data signals. The data driver continuously monitors and adjusts which pixel parts receive discharge signals, creating a dynamic optimization between image quality requirements and power consumption.
3Ease of operation
If conventional pre-charge and discharge signals are used without considering data signals, then pixel parts can be charged and discharged to predetermined levels, but the actual needed charge values cannot be achieved leading to poor image representation
Solution Approach 1:
The patent incorporates feedback mechanisms where the data driver analyzes the relationship between incoming data signals and current pixel part states to determine optimal pre-charge and discharge amounts. This feedback loop enables the system to achieve precise charge values that accurately represent the desired image, moving beyond simple predetermined charge levels to data-driven precision charging.
Solution Approach 2:
The patent performs preliminary calculations and adjustments in the data driver before signals are applied to pixel parts. By pre-determining the exact charge values needed based on data signal analysis, the system can apply precisely calibrated pre-charge and discharge signals, achieving high image quality precision while maintaining operational efficiency.
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 approach enables exact representation of desired images with reduced power consumption, enhancing the overall image quality and efficiency of the display by supplying optimal charge values to the pixel part.
Implementation Method 1
an organic light emitting display device comprises an organic emission layer formed between an anode and a cathode. Thus, holes supplied from an anode and electrons supplied from a cathode are connected together within the organic emission layer to produce excitons, which are electron-hole pairs. When these excitons transit to a ground state, a certain level of energy is produced, and this energy causes the organic light emitting display device to emit light.
Data Source
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AI summary
Provided is a flat panel display and a method for driving the same. The flat panel display comprises a substrate, a pixel part having a plurality of sub-pixels formed on the substrate; and a data driver supplying to the pixel part data signals and charge signals containing charge values that correspond to the data signals. Each charge signal comprises a first charge signal and a second charge signal, and the first charge signal is a voltage signal selected from a plurality of preset voltage levels. The second charge signal is a current signal corresponding to the difference between the voltage value corresponding to the first charge signal and the charge value that corresponds to the data signal.