Pixel Circuit Driving Module Threshold Voltage Adjustment
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Solution Overview
Problem
Existing pixel circuits in display panels have a relatively low driving current, leading to low light emitting efficiency in light emitting elements such as micro LEDs, mini LEDs, and OLEDs.
Innovation Solution
A pixel circuit with a driving module that includes a first control terminal for receiving a control signal and a second control terminal for receiving an adjustment signal, where the voltage value of the adjustment signal changes between stages, allowing for an adjustment in the threshold voltage offset, thereby increasing the driving current by providing different voltage values in different stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pixel circuit uses a conventional driving module with fixed threshold voltage, then the circuit structure is simple, but the driving current is low and light emitting efficiency is poor
Solution Approach 1:
The patent applies the dynamics principle by making the threshold voltage of the driving module adjustable rather than fixed. A second control terminal is added to receive adjustment signals that dynamically change the threshold voltage according to different operating stages (writing stage vs. light emitting stage). This allows the circuit to adapt its characteristics to different operational requirements, resolving the contradiction between structural simplicity and driving current performance.
Solution Approach 2:
The patent implements parameter changes by modifying the threshold voltage parameter of the driving module based on operational stage. During the writing stage, a first voltage value is applied to the second control terminal, while during the light emitting stage, a second voltage value (different from the first) is applied. This parameter adjustment enables the circuit to achieve higher driving current in the light emitting stage without fundamentally changing the circuit structure.
2Productivity
If the pixel circuit adds a second control terminal for adjustment signal, then the driving current increases and light emitting efficiency improves, but the device complexity increases
Solution Approach 1:
The patent applies the universality principle by designing the driving module to serve multiple functions through its dual control terminals. The first control terminal handles standard control signals for basic operation, while the second control terminal handles adjustment signals for threshold voltage optimization. This multi-functionality allows a single driving module to adapt to different operational stages without requiring separate circuits for each function, thereby limiting the increase in device complexity.
Solution Approach 2:
The dynamics principle is applied to make the threshold voltage adjustable according to operational needs. By adding only one extra control terminal (the second control terminal) that receives stage-dependent adjustment signals, the circuit gains dynamic adaptability. This minimal structural addition enables the circuit to optimize driving current in different stages without proportionally increasing overall complexity.
Data Source
AI summary
The embodiments of the present application provide a pixel circuit, a display panel and a display apparatus. The pixel circuit includes: a driving module including a first control terminal for receiving a control signal and a second control terminal for receiving an adjustment signal, in which a voltage value of the adjustment signal is a first voltage value when the driving module operates in a first stage and is a second voltage value when the driving module operates in a second stage, and the first voltage value is different from the second voltage value. The embodiments of the present application can increase the driving current of the pixel circuit.