Micro-LED TFT Display Structure for Low-Power Uniform Brightness
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current display technologies, such as TFT-LCD and OLED, face issues with high power consumption, inefficient power usage, and manufacturing costs, as well as limitations in response speed and lifespan due to their design and driving mechanisms.
Innovation Solution
A display apparatus utilizing micro-light emitting diodes (micro-LEDs) formed from nitride semiconductors, which are driven by a thin film transistor (TFT) panel, allowing for low power consumption, high resolution, and efficient light emission through reflective electrodes and encapsulation, enabling the use in wearable devices and large displays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If TFT-LCD uses one LED as backlight source for many pixels, then device complexity is reduced, but power consumption increases and cannot be adjusted per pixel brightness
Solution Approach 1:
The backlight system is segmented into individual LED units corresponding to each pixel or group of pixels. Each LED can be independently controlled by its own TFT, enabling localized brightness adjustment and reducing overall power consumption when only certain areas need illumination.
Solution Approach 2:
The display system transitions from a static backlight that illuminates all pixels uniformly to a dynamic system where each LED's brightness can be independently adjusted based on display requirements, enabling power savings by activating only necessary regions.
2Device complexity
If OLED is used for display, then device complexity is reduced compared to TFT-LCD, but power consumption is much higher than inorganic LED
Solution Approach 1:
The invention transitions from organic LED materials to inorganic semiconductor materials, fundamentally changing the material parameter to achieve superior power efficiency while maintaining the self-emissive display structure that keeps device complexity low.
Solution Approach 2:
The display combines inorganic semiconductor LED materials with TFT driving structures to create a hybrid system that leverages the power efficiency of inorganic LEDs while maintaining the structural simplicity and integration benefits of TFT-based displays.
3Ease of operation
If PMOLED uses pulse amplitude modulation for large capacitance OLED, then brightness control is achieved, but response speed deteriorates
Solution Approach 1:
The invention replaces the passive matrix addressing system with an active matrix TFT-based driving system, substituting the charge storage mechanism with active transistor control that provides faster response times while maintaining brightness control capabilities.
4Ease of operation
If PMOLED uses pulse width modulation for low duty ratio, then brightness control is achieved, but lifespan deteriorates due to high current driving
Solution Approach 1:
The invention replaces the passive matrix system with active matrix TFT control, substituting high-current pulsed driving with lower-current continuous control through active transistors, thereby extending OLED lifespan while maintaining brightness control.
5Speed
If AMOLED uses TFT connection for each pixel, then response speed is improved, but manufacturing cost increases and brightness uniformity deteriorates due to TFT characteristics
Solution Approach 1:
The invention extracts the light-emitting function from the TFT structure itself, using dedicated LED units that are electrically connected to TFTs but physically separate. This separates the driving function (TFT) from the light emission function (LED), improving manufacturability and brightness uniformity while maintaining fast response speeds.
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 micro-LED display apparatus achieves low power consumption, high efficiency, and improved luminous efficacy, reducing manufacturing costs and failure rates while enabling the production of large, high-resolution displays with uniform brightness.
Implementation Method 1
A light emitting diode refers to an inorganic semiconductor device that emits light through recombination of electrons and holes
Implementation Method 2
a light emitting diode refers to an inorganic semiconductor device that emits light through recombination of electrons and holes
Implementation Method 3
allows light emitted from side surfaces of the light emitting diodes to be discharged through reflection by reflective electrodes
Data Source
AI summary
A display apparatus and a method of manufacturing the same. The display apparatus includes a light emitting part including a plurality of light emitting diodes; and a thin film transistor (TFT) panel part configured to drive the plurality of light emitting diodes. The plurality of light emitting diodes are electrically connected to the plurality of TFTs, respectively, by a layer disposed between the light emitting diode part and the TFT panel part.