Display Panel Dual Emission Control for LED Color Uniformity
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Solution Overview
Problem
Micro LEDs and Mini LEDs of different colors exhibit varying luminous efficiency due to differences in light-emitting materials and temperature sensitivity, leading to color shift and luminance drop in display panels.
Innovation Solution
A display panel design that includes pixel circuits with dual light-emitting control modules, where control signals for these modules have overlapping effective pulse periods to adjust the light-emission durations of different LEDs, compensating for their efficiency differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different control signals are applied to first and second light-emitting control modules, then light-emission durations can be differentiated to compensate for luminous efficiency variations, but device complexity increases due to dual control modules and overlapping pulse periods
Solution Approach 1:
The light-emitting control function is segmented into two independent control modules (first light-emitting control module and second light-emitting control module), each capable of receiving and processing control signals separately. This segmentation enables differentiated control of light-emission durations for different LEDs within the same pixel circuit, allowing compensation for luminous efficiency variations without requiring entirely separate pixel circuits for each LED type.
2Reliability
If dual light-emitting control modules are used with overlapping effective pulse periods, then LEDs with lower luminous efficiency can achieve longer light-emission durations, but the control signal complexity increases
Solution Approach 1:
The control signals applied to the first and second light-emitting control modules are designed as periodic pulse signals with overlapping effective pulse periods. This periodic action enables precise temporal control of each LED's light-emission duration, allowing lower-efficiency LEDs (such as red LEDs) to emit light for longer periods while higher-efficiency LEDs emit for shorter periods, thereby achieving uniform luminance output across different LED types.
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 improves display effect by ensuring that LEDs with lower luminous efficiency, such as red LEDs, achieve longer light-emission durations, thereby reducing color shift and enhancing overall luminance.
Implementation Method 1
Micro light-emitting diodes (Micro LEDs) and Mini light-emitting diodes (Mini LEDs) will become mainstream technologies to future display products
Data Source
AI summary
Display panel and display apparatus are provided. Pixel circuit in display panel includes drive transistor, first light-emitting control module, and second light-emitting control module. In first pixel circuit, control terminal of first light-emitting control module receives first control signal, and control terminal of second light-emitting control module receives second control signal. In second pixel circuit, both control terminal of first light-emitting control module and control terminal of second light-emitting control module receive first control signal or receive second control signal. In first mode, first control signal and second control signal are different control signals. In working cycle of first pixel circuit, effective pulse period of first control signal partially overlaps with an effective pulse period of second control signal. The present disclosure can make different light-emitting devices achieve different light-emitting durations, thereby compensating differences of different light-emitting devices in luminous efficiency.