Display Control Method for Synchronized Semiconductor Emitter Activation
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Solution Overview
Problem
Existing display technologies face challenges in efficiently activating light-emitting semiconductor emitters with high color reproduction quality, particularly due to differences in intrinsic activation times and capacitances among red, green, and blue-emitting semiconductor chips, leading to color shifts and reduced minimum brightness representation.
Innovation Solution
A control method that determines and compensates for individual semiconductor emitters' intrinsic activation times by adjusting activation delays and turn-on current changes, ensuring simultaneous light emission across emitters, thereby minimizing color shifts and maximizing brightness representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If semiconductor emitters with different intrinsic activation times are operated simultaneously, then the display can achieve high frame rates and low brightness representation, but color shifts occur due to unsynchronized light emission
Solution Approach 1:
The patent applies preliminary action by determining the intrinsic activation times of semiconductor emitters in advance and calculating individual activation delays before operation. This pre-characterization allows the system to compensate for different activation times by delaying the activation of faster emitters, ensuring synchronized light emission across all emitters during high-frame-rate operation, thereby preventing color shifts while maintaining high productivity
2Manufacturing precision
If individual activation delays are applied to compensate for different intrinsic activation times, then color reproduction quality improves, but the control system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the control of semiconductor emitters into individual segments, where each emitter is characterized separately for its intrinsic activation time and assigned a specific activation delay. This segment-based approach allows precise control of each emitter's timing while using standardized control structures, achieving high color reproduction quality without proportionally increasing overall system complexity
Solution Approach 2:
The patent applies parameter changes by adjusting the activation delay parameter for each semiconductor emitter based on its measured intrinsic activation time. By varying this temporal parameter individually for each emitter, the system synchronizes light emission across all emitters, improving color reproduction quality while using a simple parameter-adjustment mechanism rather than complex hardware modifications
3Device complexity
If standard activation timing is used for all semiconductor emitters, then the control system remains simple, but minimum brightness representation deteriorates at low brightness levels
Solution Approach 1:
The patent applies preliminary action by pre-determining the intrinsic activation times of all semiconductor emitters during manufacturing or initialization. This advance characterization enables the system to optimize activation timing for low-brightness operation without increasing operational complexity, as the optimization parameters are established beforehand and can be applied uniformly across all emitters during low-brightness display scenarios
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 method achieves synchronized light emission with minimal color shifts and increased brightness, particularly at low brightness levels and high frame rates, enhancing the representation of HDR images by compensating for manufacturing tolerances and external influences.
Implementation Method 1
Each of the semiconductor emitters can thus be formed by a separate light-emitting diode chip... the semiconductor layer sequence has at least one active zone, which is configured to generate radiation during operation of the light-emitting diode chip
Data Source
AI summary
A control method includes A) determining intrinsic activation times of individual semiconductor emitters of a display device. The display device includes a plurality of light-emitting semiconductor emitters with different intrinsic activation times. The method also includes B) determining and storing in each case an activation delay and/or a turn-on current change for each individual one of the semiconductor emitters. The method further includes C) energizing the individual semiconductor emitters according to the previously determined activation delay and/or turn-on current change, so that in a display mode of the display device the semiconductor emitters have equally long starting times for a light emission.