Micro-LED Display Layout for Precise Brightness and Lower Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing display technologies, such as TFT-LCDs and OLEDs, face challenges with high power consumption, inaccurate brightness control, and increased manufacturing costs due to the need for constant backlighting and complex pixel driving circuits.
Innovation Solution
A display apparatus utilizing micro-light emitting diodes (LEDs) with a TFT panel unit, where the LEDs are regularly arranged on a substrate and electrically connected to the TFTs, allowing for precise control of brightness and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If TFT-LCD uses one LED as light source for many pixels, then device complexity is reduced, but power consumption increases and brightness control precision deteriorates
Solution Approach 1:
The patent divides the backlight unit into multiple independently controllable LED modules, where each LED module corresponds to a specific region or pixel group. This segmentation allows individual control of each LED module's brightness and operation, enabling precise local dimming and region-by-region power management, thus resolving the contradiction between simplified structure and power consumption/brightness control
2Device complexity
If TFT-LCD uses one LED as light source for many pixels, then device complexity is reduced, but brightness control precision deteriorates
Solution Approach 1:
The backlight unit is segmented into multiple LED modules with independent control, allowing precise brightness adjustment for each module. This enables local dimming and region-specific brightness control, achieving high brightness precision without requiring complex per-pixel LED structures
3Ease of manufacture
If OLED is used for display, then manufacturing process is simplified, but power consumption increases compared to inorganic LEDs
Solution Approach 1:
The patent utilizes the inherent advantages of organic LED materials, particularly their ability to achieve electroluminescence at lower driving voltages and currents compared to inorganic LEDs. By optimizing the organic semiconductor layer composition and device structure, the patent achieves efficient light emission with reduced power consumption while maintaining manufacturing simplicity
4Illumination intensity
If passive matrix OLED uses high current driving for low duty ratio, then brightness is improved, but lifespan deteriorates
Solution Approach 1:
The patent employs pulse width modulation (PWM) driving with optimized duty cycles, where the OLED is driven in periodic pulses rather than continuous high current. This periodic action allows brightness control through pulse duration and frequency while keeping average current low, thus maintaining brightness performance without compromising device lifespan
5Stability of the object's composition
If active matrix OLED connects TFTs for each pixel, then brightness uniformity is improved, but manufacturing cost increases
Solution Approach 1:
The patent implements a hybrid architecture where the display is divided into multiple pixel groups, with each group controlled by a shared TFT circuit. This segmentation approach reduces the number of TFTs required per pixel compared to full active matrix, lowering manufacturing complexity and cost while maintaining sufficient brightness uniformity through local control capabilities
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 display apparatus achieves low power consumption, accurate brightness regulation, and reduced manufacturing costs, making it suitable for wearable devices, smartphones, and TVs while maintaining high efficiency and resolution.
Implementation Method 1
A light emitting diode refers to an inorganic semiconductor device configured to emit light through recombination of electrons and holes
Data Source
AI summary
A display apparatus includes a support substrate, a plurality of light emitting structures regularly arranged on the support substrate, and a wavelength conversion part disposed on the plurality of light emitting structures. The wavelength conversion part includes light transmitting portions and blocking portions, the light transmitting portions being disposed on the light emitting structures, respectively, and each of the light transmitting portions including a phosphor for converting a wavelength of light emitted from the corresponding light emitting structure. The support substrate includes a plurality of conductive patterns electrically connected to the light emitting structures, and the light emitting structures are coupled to the plurality of conductive patterns.