Micro LED Display Timing Control Circuit for Current Distribution
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Solution Overview
Problem
In micro LED display devices, driving multiple LEDs simultaneously leads to excessive instantaneous current, causing voltage drops and potential component damage due to the large number of LED drivers operating concurrently.
Innovation Solution
A method and architecture where multiple display regions are controlled by a timing control circuit generating distinct timing control signals for each LED driving circuit, allowing LEDs to be turned on at different timings, thereby distributing current more evenly and preventing excessive transient currents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple LED drivers drive LEDs simultaneously, then display coverage and brightness are improved, but instantaneous current becomes excessively large causing voltage drops and component damage
Solution Approach 1:
The patent implements periodic action by dividing the display into multiple regions and driving different regions at different time periods. The timing control circuit generates timing control signals that sequentially activate LED drivers for different display regions, ensuring that not all LEDs are driven simultaneously. This periodic activation pattern maintains display brightness while preventing excessive instantaneous current that would damage components.
Solution Approach 2:
The patent applies segmentation by dividing the display into multiple display regions, each with its own LED drivers. The timing control circuit independently controls each region's driving timing, allowing selective activation of different segments. This segmentation enables the system to achieve full display coverage while controlling instantaneous current by activating only the necessary segments at any given time.
2Productivity
If all LED drivers operate concurrently to maximize display output, then productivity and display coverage are improved, but instantaneous current increases causing voltage drops
Solution Approach 1:
The timing control circuit implements periodic action by sequentially activating different LED driver groups at different time intervals. Instead of all drivers operating concurrently, the system cycles through different driver combinations, each handling a specific display region. This maintains high display output efficiency while significantly reducing instantaneous current demand on the power supply and control circuitry.
Solution Approach 2:
The patent applies preliminary action by having the timing control circuit pre-plan and sequence the activation of different LED driver groups. The control signals are generated in advance to ensure that drivers are activated in a coordinated sequence rather than simultaneously. This preliminary sequencing maintains display productivity while preventing power surges by distributing the driving load over time.
Data Source
AI summary
A method and a display device are provided. The method includes: generating a plurality of timing control signals for controlling a plurality of LED driving circuits, wherein the plurality of timing control signals include a first timing control signal and a second timing control signal; allowing the first LED driving circuit to drive an Nth scan line of a first display region at a first driving timing through the first timing control signal; and allowing the second LED driving circuit to drive an Nth scan line of the second display region at a second driving timing that is different from the first driving timing through the second timing control signal.