Interposer Pixel-Driving Circuit for High-Resolution LED Displays
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Solution Overview
Problem
Existing LED displays face challenges in various characteristics such as size flexibility, high resolution, manufacturing costs, reliability, and fast response speed, with driving circuits requiring further improvements.
Innovation Solution
A pixel-driving circuit is developed on an interposer, connected to a display substrate via bumps, incorporating a row terminal, column terminal, common element, and individual elements to drive multiple display pixels, with optional sensors and power generators, and includes a column and row signal distributor for efficient signal distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If driving circuits are integrated directly on display substrate, then device complexity is reduced, but manufacturing precision and reliability deteriorate due to heat and process compatibility issues
Solution Approach 1:
The patent introduces a driver IC as an intermediary component between the display substrate and the control system. This driver IC handles all driving circuits externally, eliminating the need to integrate circuits directly on the display substrate. The driver IC receives image signals and generates appropriate driving signals for the display elements, thus resolving the conflict between reducing device complexity and maintaining manufacturing precision.
2Ease of operation
If more driving circuits are integrated on substrate, then ease of operation improves, but manufacturing costs and device complexity increase
Solution Approach 1:
The patent combines multiple driving functions into a single driver IC component. Instead of having separate circuits for each display element on the substrate, the driver IC integrates all necessary driving circuits in one external package. This merging approach simplifies the overall device architecture while maintaining ease of operation, as the driver IC centrally manages signal distribution to all display elements.
3Productivity
If circuit integration is increased, then productivity improves, but reliability deteriorates due to heat generation and process constraints
Solution Approach 1:
The driver IC serves as an intermediary that externalizes heat-generating driving circuits away from the display substrate. By placing circuits in a separate component, the display substrate itself remains thermally stable and is not subjected to process constraints associated with high-temperature circuit fabrication. This maintains reliability while still achieving productivity through integrated circuit packaging.
Data Source
AI summary
A pixel-driving circuit for driving a digital display device, the pixel-driving circuit formed on an interposer that is electrically connected to a display substrate through a plurality of bumps. The pixel-driving circuit comprises a row terminal connected to a row bump connected to a row line of a row-driving circuit among the plurality of bumps, a column terminal connected to a column bump connected to a column line of a column-driving circuit among the plurality of bumps, a common element that shares at least one of the row terminal or the column terminal for L (Lis a positive integer greater than or equal to 2) display pixels formed on the interposer, and L pixel individual elements connected to the common element and driving a plurality of light emitters included in each of the L display pixels.