Series-Connected Light Emitting Substrate With Relay Signal Driving
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Solution Overview
Problem
The challenge in display products using light emitting diodes is the high cost and complexity of independently controlling numerous mini or micro light emitting diodes due to the need for a large number of driving chips and dense signal lines, which increases product costs and complicates design and processing.
Innovation Solution
A light emitting substrate with a driving circuit that outputs relay and driving signals to sequentially connected light emitting elements, allowing for independent control of light emission brightness with reduced signal lines and simplified control, using a power line carrier communication protocol to integrate communication data with power signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If independently control each mini or micro light emitting diode, then light emission brightness control precision is improved, but device complexity and cost increase due to large number of driving chips and dense signal lines
Solution Approach 1:
The patent segments the array of light emitting diodes into multiple groups, with each group controlled by a single driving chip. This segmentation allows independent brightness control of each group while reducing the total number of driving chips needed compared to controlling each LED individually.
Solution Approach 2:
The patent merges multiple light emitting diodes into groups that share common control signals and power lines. By combining LEDs that require identical control signals into the same group, the system reduces signal line density and driving chip requirements while maintaining independent group-level brightness control.
2Adaptability or versatility
If increase number of driving chips to control each light emitting diode, then light emission control capability is improved, but manufacturing cost and design complexity increase
Solution Approach 1:
Each driving chip is designed to control multiple light emitting diodes simultaneously, making the driving chip multi-functional. This universality allows a single driving chip to perform the control function for an entire group of LEDs, reducing the total number of chips needed and simplifying manufacturing.
Solution Approach 2:
The patent transitions from one-dimensional individual LED control to two-dimensional group control, where LEDs are organized in groups that share control resources. This dimensional change in control architecture reduces the number of driving chips and signal lines while maintaining comprehensive control capability.
3Measurement precision
If use dense signal lines to connect each light emitting diode, then control precision is improved, but product cost and processing complexity increase
Solution Approach 1:
The patent combines signal lines by making them shared resources for groups of LEDs. Instead of dedicating separate signal lines to each LED, the same signal lines carry control signals to multiple LEDs within a group, significantly reducing signal line density while maintaining control precision at the group level.
Data Source
AI summary
A light emitting substrate, a method of driving a light emitting substrate, and a display device are provided. The light emitting substrate includes a plurality of light emitting units arranged in an array. Each light emitting unit includes a driving circuit, a plurality of light emitting elements, and a driving voltage terminal. The plurality of light emitting elements are sequentially connected in series and connected between the driving voltage terminal and the output terminal of the driving circuit. The driving circuit is configured to output a relay signal through the output terminal in a first period according to a first input signal received by the first input terminal and a second input signal received by the second input terminal, and supply a driving signal to the plurality of light emitting elements sequentially connected in series through the output terminal in a second period.