OLED Light-Emitting Control Circuit for Adjustable Stable Pulse Width
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Solution Overview
Problem
Conventional light-emitting control signal generation circuits in OLED displays have fixed pulse widths, limiting their ability to adjust brightness and resulting in unstable pulse widths and potential levels, which affects display quality and increases power consumption.
Innovation Solution
A light-emitting control signal generation circuit with a first and second control unit and an output unit, controlled by effective pulse signals, clock signals, and voltage signals, allowing for adjustable pulse widths to meet different brightness requirements, using a simple circuit structure to ensure stable output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional light-emitting control signal generation circuit with fixed pulse width is used, then the circuit structure is simple, but the display brightness cannot be adjusted and power consumption increases
Solution Approach 1:
The patent implements dynamic pulse width adjustment by introducing multiple clock signal terminals (first clock signal terminal and second clock signal terminal) that can be selectively activated. The control units respond to clock signals to dynamically change the pulse width of output signals, enabling brightness adjustment from fixed to variable without substantially increasing circuit complexity
Solution Approach 2:
The patent changes the time parameter (pulse width) of the output signal by providing different clock signals with different frequencies or duty cycles to the clock signal terminals. This allows the same circuit structure to produce different pulse widths, achieving brightness adjustment through parameter variation rather than structural modification
2Adaptability or versatility
If the pulse width of light-emitting control signal is adjusted to meet different brightness requirements, then display flexibility is improved, but the pulse width becomes unstable
Solution Approach 1:
The patent employs control units that monitor the clock signal inputs and adjust the output pulse width accordingly. The control units receive clock signals from different terminals and use feedback mechanisms to ensure that the output pulse width remains stable and consistent with the intended brightness level, preventing instability when adjusting pulse width
Solution Approach 2:
The patent pre-configures multiple clock signal terminals with specific signal characteristics before operation. By preparing the clock signals in advance with precise timing and frequency characteristics, the system ensures stable pulse width output when switching between different brightness levels, avoiding instability during transitions
3Use of energy by moving object
If a fixed pulse width signal is used, then the circuit operation is simple, but power consumption increases due to inability to adjust brightness
Solution Approach 1:
The patent uses periodic clock signals with adjustable duty cycles or frequencies to control the light-emitting duration. By varying the periodic characteristics of the clock signals, the system can reduce the average power consumption during dimmer display modes while maintaining the ability to generate signals when needed, achieving energy savings without complicating signal generation
Data Source
AI summary
A light-emitting control signal generation circuit, a driving method thereof, and a display device are provided. The light-emitting control signal generation circuit includes a first control unit, a second control unit, and an output unit. The first control unit controls a potential-level on a first node under control of an effective pulse signal, a first clock signal, a second clock signal, and a first voltage signal. The second control unit controls a potential-level on a second node under control of the effective pulse signal, the first clock signal, the second clock signal, the first voltage signal, a second voltage signal, and the potential-level on the first node. The output unit transmits the first voltage signal to an signal output terminal under control of the potential-level on the first node, and transmits the second voltage signal to the signal output terminal under control of the potential-level on the second node, respectively.