Mini LED Driving Circuit With Staggered Sub-Region Signal Loading
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Solution Overview
Problem
In high power driving of mini light-emitting diodes, large electromagnetic interference signals are generated, causing signal errors and abnormal lighting due to simultaneous loading of signals, which affects the brightness control of each light-emitting sub-region.
Innovation Solution
A method for driving a light-emitting substrate involves loading a first signal to the first signal ends in the control region and delaying the loading of second signals to the second signal ends of each light-emitting sub-region by a first duration after the first signal is provided, allowing the signals to be staggered and reducing instantaneous power consumption and signal interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If signals are loaded simultaneously to all light-emitting sub-regions, then the brightness control speed is improved, but large electromagnetic interference signals are generated causing signal errors and abnormal lighting
Solution Approach 1:
The patent divides the light-emitting substrate into multiple control regions, with each control region containing multiple light-emitting sub-regions. By segmenting the substrate and controlling different regions sequentially rather than simultaneously, the patent reduces the peak current demand and electromagnetic interference while maintaining overall brightness control effectiveness.
Solution Approach 2:
The patent implements periodic scanning of control regions, where each control region is activated in sequence during a scanning period. This periodic action allows the system to maintain fast response by quickly cycling through regions while preventing harmful electromagnetic interference by ensuring not all regions are active simultaneously.
2Illumination intensity
If high power driving is applied to mini light-emitting diodes, then the brightness and contrast performance is improved, but signal errors and abnormal lighting occur due to electromagnetic interference
Solution Approach 1:
By segmenting the display into multiple control regions that are activated sequentially, the patent enables high power driving of mini LEDs within each region without generating overwhelming electromagnetic interference. The segmentation isolates the high-current switching events in time and space, maintaining signal accuracy while achieving high brightness and contrast ratios.
Solution Approach 2:
The patent introduces control regions as intermediary layers between the driving circuit and individual light-emitting sub-regions. These control regions act as buffers that manage power distribution and signal timing, allowing high power driving while filtering out electromagnetic interference before it reaches the signal processing circuits.
3Illumination intensity
If all light-emitting sub-regions are activated simultaneously, then the overall display brightness is improved, but instantaneous power consumption increases causing signal distortion
Solution Approach 1:
The patent segments the display into multiple control regions that are activated in sequence rather than simultaneously. This temporal segmentation distributes the power consumption over time, preventing instantaneous power spikes while maintaining overall display brightness through rapid scanning and persistence of vision.
Solution Approach 2:
By implementing periodic scanning of control regions, the patent achieves sustained display brightness through rapid cycling. Each region receives full power during its active period, but the staggered timing across regions ensures that total instantaneous power consumption remains within safe limits, avoiding signal distortion.
Data Source
AI summary
Provided are a method for driving a light-emitting substrate, a driving circuit and a display apparatus. The light-emitting substrate includes: at least one control region, which includes a plurality of light-emitting sub-regions, the light-emitting sub-region includes a plurality of light-emitting elements which are connected in series and/or in parallel; each light-emitting sub-regions includes a first signal end and a second signal end, in a same control region, the first signal ends of all the light-emitting sub-regions are electrically connected with each other, and the second signal ends of the different light-emitting sub-regions are independent of each other; the method includes: loading a first signal to the first signal ends in the control region; and loading second signals to the second signal ends of each of the plurality of the light-emitting sub-regions in the control region when a first duration is delayed after the first signal is provided.