OLED Driving Device Duty Cycle Control via Signal Segmentation
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Solution Overview
Problem
Existing OLED display panel driving devices face limitations in accurately adjusting the duty cycle of light-emitting control signals, which affects the lighting of pixel units, and this adjustment is often tied to the line time of the display panel.
Innovation Solution
A driving device with a control circuit and logic gates that generates a global light-emitting control signal and determines its duty cycle, allowing for independent transmission to groups of light-emitting control lines, enabling precise lighting of pixels regardless of line time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the duty cycle of the light-emitting control signal is adjusted using a shift register with clock signal, then the light-emitting control lines can be driven sequentially, but the adjustment accuracy of the duty cycle is limited by the line time of the display panel
Solution Approach 1:
The light-emitting control lines are divided into multiple groups, and a separate light-emitting control signal is generated for each group. This segmentation allows independent duty cycle adjustment for each group without being constrained by the overall line time, thereby improving duty cycle adjustment accuracy while maintaining time efficiency.
2Device complexity
If a single light-emitting control signal is used for all light-emitting control lines, then the circuit structure is simplified, but the operational flexibility and precision for different pixel groups is reduced
Solution Approach 1:
The control system is segmented into multiple independent control paths, each handling a specific group of light-emitting control lines. This allows the system to maintain relatively simple individual control circuits while achieving high operational flexibility through parallel processing of multiple groups with different duty cycles.
Solution Approach 2:
The system dynamically assigns different duty cycles to different groups of light-emitting control lines based on operational requirements. This dynamic adaptability allows the display device to optimize performance for different viewing conditions, refresh rates, or power consumption scenarios without requiring a completely complex control architecture.
Data Source
AI summary
A driving device and an operation method thereof are provided. The driving device drives a plurality of light-emitting control lines of an organic light emitting diode (OLED) display panel. The light-emitting control lines are divided into a plurality of groups. The driving device includes a control circuit and a plurality of logic gates. The control circuit generates a global light-emitting control signal and determines a duty cycle of the global light-emitting control signal. Any one of the logic gates determines whether to transmit the global light-emitting control signal to the light-emitting control lines of a corresponding group among the groups. When the global light-emitting control signal is transmitted to a corresponding light-emitting control line among the light-emitting control lines, a pulse of the global light-emitting control signal may light up a plurality of pixels connected to the corresponding light-emitting control line.