OLED Driving Circuit With Inductor for Flicker-Free Brightness
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Solution Overview
Problem
Existing OLED display panels face issues of uneven brightness change and flickering due to sudden changes in driving current, which are exacerbated by complex display driving circuits with numerous transistors, increasing failure rates and manufacturing costs.
Innovation Solution
A display driving circuit incorporating a first transistor, data writing unit, storage unit, and inductor, where the inductor is connected in series with the display light-emitting unit to stabilize current flow, reducing complexity and protecting against sudden current changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large number of transistors are added to construct a complex display driving circuit, then problems such as uneven brightness change and uneven brightness of different OLEDs are solved, but the operation of the circuit becomes extremely complex, the failure rate of the circuit increases, and the manufacturing cost of the display panel increases
Solution Approach 1:
The patent extracts and eliminates redundant transistors from the traditional complex driving circuit. By using a simplified circuit architecture with fewer transistors, the invention maintains brightness uniformity while reducing circuit complexity and failure rate.
Solution Approach 2:
The patent changes the electrical parameters and configuration of the remaining transistors to compensate for the reduced number of components. By optimizing the parameters of the simplified circuit, the invention achieves the desired brightness uniformity without requiring a large number of transistors.
2Reliability
If a large number of transistors are added to construct a complex display driving circuit, then problems such as uneven brightness change and uneven brightness of different OLEDs are solved, but the manufacturing cost of the display panel increases
Solution Approach 1:
The patent removes unnecessary transistors from the circuit design, directly reducing the number of components that need to be manufactured and assembled. This extraction of redundant elements lowers manufacturing costs while maintaining the required brightness uniformity through optimized circuit configuration.
3Illumination intensity
If the driving current changes suddenly, then the brightness of the OLED changes, but the brightness changes unevenly and the OLED may flicker
Solution Approach 1:
The patent incorporates buffering mechanisms in the simplified driving circuit to prevent sudden changes in driving current. By designing the circuit with inherent current stabilization features, the invention cushions against abrupt current variations before they can cause uneven brightness or flickering.
Solution Approach 2:
The patent implements feedback mechanisms that monitor the driving current and adjust it to maintain stable brightness. The feedback control ensures that sudden current changes are detected and corrected, preventing uneven brightness distribution and flickering in the OLED display.
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
The solution stabilizes current flow, preventing uneven brightness and flickering, simplifies the circuit design, enhances reliability, and lowers manufacturing costs by reducing the number of transistors required.
Implementation Method 1
an inductor, connected in series with the display light-emitting unit between the first power supply and the second power supply
Data Source
AI summary
A display panel includes a display driving circuit and display light-emitting units. The display driving circuit includes a first transistor, a data writing unit, a storage unit, and an inductor. The first end of the first transistor is directly or indirectly connected to a first power supply, and the second end of the first transistor is directly or indirectly connected to a second power supply. The control end of the first transistor is connected to a first node. The display light-emitting unit is connected in series with the first transistor between the first power supply and the second power supply. The storage unit is connected to the first power supply and the first node. The inductor is connected in series with the display light-emitting unit between the first power supply and the second power supply.