Array Substrate Layout for Uniform Mini-LED Pixel Driving
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Solution Overview
Problem
Mini and micro inorganic light-emitting diodes face issues with brightness uniformity under low current density, and existing pixel circuits for organic light-emitting diodes are not suitable for driving them due to the need for larger thin film transistors, leading to high power consumption and poor uniformity.
Innovation Solution
An array substrate design with a pixel driving chip that directly drives sub-pixels of at least three colors, utilizing inorganic light-emitting diodes, and a method for detecting the substrate to ensure proper connection and functionality, including a bezel region with optimized signal routing and detection of signal lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing pixel circuits for organic light-emitting diodes are used to drive mini and micro inorganic light-emitting diodes, then the inorganic LEDs can be driven, but larger thin film transistors are required leading to high power consumption and poor uniformity
Solution Approach 1:
The invention divides the pixel circuit into separate functional modules: a switching circuit portion and a driving circuit portion. The switching circuit (including first and second switching transistors) separately controls the driving transistor, allowing independent optimization of each module. This segmentation enables the driving transistor to operate at optimal current density for uniform brightness while reducing overall power consumption through efficient signal routing and control.
2Reliability
If larger thin film transistors are used to drive mini and micro inorganic light-emitting diodes, then the inorganic LEDs can be driven, but power consumption increases and uniformity deteriorates
Solution Approach 1:
The pixel circuit is segmented into distinct switching and driving portions, each with optimized transistor sizes. The switching transistors are sized appropriately for their control function, while the driving transistor is optimized for current density control. This eliminates the need for oversized transistors throughout the entire circuit, reducing device complexity while maintaining brightness uniformity.
Solution Approach 2:
The invention introduces a temporal dimension through time-division multiplexing of signal lines. The switching circuit controls the timing of signal transmission, allowing multiple pixels to share common signal lines at different time intervals. This dimensional approach reduces the spatial complexity of wiring and transistor arrangements while maintaining precise control for uniform display.
3Use of energy by moving object
If mini and micro inorganic light-emitting diodes operate under low current density, then power consumption is reduced, but brightness uniformity becomes poor
Solution Approach 1:
The switching circuit dynamically adjusts the timing and duration of signal transmission to the driving transistor. By controlling the pulse width and timing of drive signals, the circuit maintains optimal current density through the inorganic LEDs during active periods, ensuring brightness uniformity. The dynamic control allows the system to operate at lower average power consumption while maintaining peak performance characteristics for uniform display.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables uniform display with high current density, reduces power consumption, and improves brightness uniformity by directly driving inorganic light-emitting diodes, while also reducing the bezel width and production costs through efficient detection and manufacturing processes.
Implementation Method 1
each of the sub-pixels includes at least one inorganic light-emitting diode
Implementation Method 2
An inorganic light-emitting diode emits light on the basis of a metal semiconductor
Data Source
AI summary
Disclosed are an array substrate, a detection method for the array substrate, and a splicing display panel. In the array substrate, each of pixels (1) includes sub-pixels (01) of at least three colors and a pixel driving chip (02) for driving each sub-pixel (01) to emit light; each sub-pixel (01) includes at least one inorganic light-emitting diode; a display area (A1) further includes: a positive signal line (Hm) connected to a positive electrode of each inorganic light-emitting diode, and a data signal line (Dm), a scanning line (Sn), and a reference signal line (Vm) connected to each pixel driving chip (02); each pixel driving chip (02) is used for writing signals of the data signal line (Dm) into the sub-pixels (01) of different colors under the control of the corresponding scanning line (Sn) in a time division manner.