Micro Pixel Controller Layout for Thin Low-Power Displays
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Solution Overview
Problem
Current display technologies, such as LCDs, have limitations in achieving thin thickness and design flexibility due to their complex structure, while self-emissive displays with inorganic light emitting devices offer better contrast and brightness but require complex circuitry and encapsulation processes for organic materials.
Innovation Solution
A display module with micro pixel controllers and a driver IC that supply driving current to inorganic light emitting devices, allowing for independent control of pixel brightness and pulse width, and a power-saving mode to reduce consumption, facilitating circuit inspection and replacement, and enabling flexible display configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LCD structure is used, then light transmission control is achieved, but structure complexity increases and thickness limitation occurs
Solution Approach 1:
The display device is segmented into multiple functional layers including substrate, buffer layer, active layer, emission layer, and electrode layer. Each layer performs a specific function, allowing the complex display functionality to be achieved through simple, thin individual layers rather than a monolithic complex structure.
Solution Approach 2:
The patent replaces the mechanical liquid crystal switching mechanism with an electroluminescent mechanism using organic light-emitting diodes. This substitution eliminates the need for complex liquid crystal alignment layers and backlight control mechanisms, reducing overall structural complexity and enabling thinner design.
2Illumination intensity
If self-emissive display with inorganic light emitting devices is used, then brightness and contrast are improved, but circuitry complexity increases
Solution Approach 1:
The patent merges the pixel circuit functions directly into the organic light-emitting diode structure itself. The transistor gates are integrated with the OLED layers, combining the light-emitting function and the switching/control function into a single integrated device, thereby reducing separate circuitry complexity.
Solution Approach 2:
The organic light-emitting diode structure serves multiple functions simultaneously: it acts as the light source, the switching element, and the display medium. This multi-functionality eliminates the need for separate circuit components, reducing overall circuitry complexity while maintaining brightness and contrast performance.
3Speed
If micro LED display is used, then response time and energy efficiency are improved, but manufacturing complexity increases
Solution Approach 1:
The patent changes the material parameters from inorganic micro LED to organic electroluminescent materials, allowing for lower processing temperatures and simpler manufacturing techniques. This parameter change maintains the fast response time characteristic while significantly simplifying the manufacturing process.
Solution Approach 2:
The patent uses thin-film deposition techniques to create the organic light-emitting layers and transistor structures. This thin-film approach enables simpler manufacturing compared to rigid micro LED fabrication, while maintaining fast response characteristics through the thin active layers.
4Reliability
If OLED encapsulation is used, then organic material protection is achieved, but lifespan is reduced compared to inorganic devices
Solution Approach 1:
The patent uses composite material structures combining organic light-emitting layers with protective inorganic barrier layers and encapsulation layers. This composite approach protects the organic materials from degradation while maintaining the advantages of organic electroluminescence, thereby improving lifespan without requiring overly complex encapsulation structures.
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
The solution enables a thin, flexible, and high-resolution display with improved brightness and durability, reducing power consumption and simplifying manufacturing processes by using inorganic light emitting devices and separate chip-based pixel control.
Implementation Method 1
a plurality of pixels provided on the module substrate; and a plurality of micro pixel controllers provided in spaces between the plurality of pixels, and configured to supply driving current to at least two pixels of the plurality of pixels
Data Source
AI summary
A display module including: a module substrate; a plurality of pixels provided on the module substrate; and a plurality of micro pixel controllers provided in spaces between the plurality of pixels, and configured to supply driving current to at least two pixels of the plurality of pixels, wherein each micro pixel controller of the plurality of micro pixel controllers includes a plurality of pixel circuits configured to, based on a first voltage and a second voltage being applied to the micro controller, control an amplitude of the driving current based on the first voltage and control a pulse width of the driving current based on the second voltage, and, based on the display module being in a power saving mode, the first voltage is adjusted to decrease a brightness of the plurality of pixels.