Mini LED Backlight Matrix Driving for Full Partition Control
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Solution Overview
Problem
The increasing complexity and cost of mini LED backlight modules due to the need for multiple driver chips and circuit layers to manage the partitions of mini LED backlight boards, which complicates circuit design and increases manufacturing costs.
Innovation Solution
A backlight board design with a first connector providing drive signals to rows and a second connector providing drive signals to columns, allowing for time-sharing control of light-emitting devices with a single driver chip, reducing the need for multiple connectors and driver chips, and simplifying the design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of driver chips is increased to ensure the number of partitions of mini LED backlight board, then the backlight partition control capability is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The patent segments the control function into two independent connectors: the first connector controls all rows of light-emitting devices, and the second connector controls all columns of light-emitting devices. This segmentation allows a single driver chip to control individual LEDs through row-column intersection, eliminating the need for multiple driver chips while maintaining full partition control capability.
Solution Approach 2:
The patent transitions from a one-dimensional control approach (single connector controlling LEDs sequentially) to a two-dimensional control approach (row connector + column connector forming a matrix). This dimensional change enables individual LED control through the intersection of row and column signals, reducing the total number of control channels required.
2Manufacturing precision
If the number of driver chips is increased to ensure the number of partitions of mini LED backlight board, then the backlight partition control capability is improved, but the manufacturing cost increases
Solution Approach 1:
The control function is segmented into two independent connectors: the first connector controls all rows of light-emitting devices, and the second connector controls all columns of light-emitting devices. This segmentation allows a single driver chip to control individual LEDs through row-column intersection, eliminating the need for multiple driver chips while maintaining full partition control capability.
Solution Approach 2:
Each connector is designed with universal functionality to control entire rows or columns of light-emitting devices. The first connector can control any row, and the second connector can control any column, allowing a single driver chip to address all LEDs through combinatorial row-column control, thereby reducing component count and manufacturing cost.
3Adaptability or versatility
If the number of circuit board layers is increased to meet circuit design requirements, then the circuit design capability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent segments the control function into two independent connectors: the first connector controls all rows of light-emitting devices, and the second connector controls all columns of light-emitting devices. This segmentation allows a single driver chip to control individual LEDs through row-column intersection, eliminating the need for multiple driver chips while maintaining full partition control capability.
Data Source
AI summary
Provided are a backlight board and a driving method thereof, a backlight module and a driving method thereof, and a display device. The backlight board includes light-emitting devices arranged in rows and columns and a first connector, where each first pin of the first connector is electrically connected to first electrodes of light-emitting devices in one row, each second pin of the first connector is electrically connected to second electrodes of light-emitting devices in one column; and in one drive cycle, a first drive signal drives light-emitting devices in each row for a duration T/n at different times, and a second drive signal drives light-emitting devices in each column for a duration T/n at different times.