Micro-LED Display Panel Comparison Module for Brightness Control
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Solution Overview
Problem
Existing display technologies using micro light-emitting diodes (Micro-LEDs) struggle to individually control the light-emitting duration of each pixel, leading to issues with brightness and display color cast, especially at high temperatures or over long usage periods.
Innovation Solution
A display panel design that includes a comparison module connected to the gate of a first transistor, allowing for the adjustment of light-emitting duration by comparing a constant comparison signal with a changing reference signal, thereby controlling the turn-on duration of the first transistor and the light-emitting duration of the Micro-LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional pixel circuits are used to control Micro-LEDs, then the display achieves high brightness and fast response, but the light-emitting duration cannot be precisely controlled leading to brightness inconsistency and color cast
Solution Approach 1:
The patent changes the control parameter from simple on/off switching to precise duration control by introducing a comparison module that generates control signals based on time-dependent voltage thresholds. The pixel circuit responds to these parameter-changed control signals to achieve precise light-emitting duration control, resolving the contradiction between control precision and brightness consistency.
Solution Approach 2:
The comparison module implements a feedback mechanism by continuously comparing the time-dependent voltage signal against reference thresholds and adjusting the control signal accordingly. This feedback loop enables precise control of the light-emitting duration, ensuring brightness consistency across different display conditions and resolving the reliability issue.
2Duration of action of stationary object
If Micro-LEDs operate at high temperatures or for long periods, then the display maintains operation, but brightness inconsistency and color cast increase due to inability to adjust light-emitting duration
Solution Approach 1:
The patent introduces dynamic control of light-emitting duration through time-dependent voltage signals that adjust the control signal characteristics. This dynamic adjustment capability allows the display to maintain color consistency and brightness uniformity even during long-term operation or high-temperature conditions, resolving the contradiction between service life and color consistency.
3Illumination intensity
If the light-emitting duration of Micro-LEDs is extended to improve brightness, then brightness increases, but display color cast worsens due to temporal variations in light emission
Solution Approach 1:
The patent precisely controls the light-emitting duration parameter through time-dependent voltage signals, optimizing both brightness and color accuracy. By adjusting the duration parameter to optimal values rather than simply extending it, the system achieves high brightness while minimizing color cast, resolving the contradiction between illumination intensity and color accuracy.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a light-emitting element, a pixel circuit, and a comparison module. The pixel circuit includes a driving transistor and a first transistor, and the first transistor and the driving transistor are connected to each other in series. The comparison module is coupled to a gate of the first transistor, and the comparison module is configured to compare a voltage value of a comparison signal and a voltage value of the reference signal to generate a control signal, and to provide the control signal to the gate of the first transistor. An operating phase of the pixel circuit includes a light-emitting phase. During the light-emitting phase, the comparison signal is a constant voltage signal, and a voltage of the reference signal changes over time in at least one period.