LED Display Voltage Control via Ground Potential Adjustment
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Solution Overview
Problem
Existing display apparatuses using LED panels face inefficiencies in voltage management, leading to heat generation and potential degradation, as they apply the same voltage to LEDs with different driving requirements, resulting in suboptimal performance and reduced durability.
Innovation Solution
A display apparatus and method where different driving voltages are supplied to LEDs by varying the ground potentials of LEDs within an LED module, using a power controller to apply distinct voltages to each LED, reducing unnecessary heat and enhancing energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the same voltage is applied to all LEDs in an LED module, then the circuit design is simple, but heat generation increases and energy efficiency decreases
Solution Approach 1:
The patent applies different ground potentials to different LEDs within the same LED module based on their specific driving voltage requirements. Each LED receives a customized voltage level (e.g., 3.0V, 3.3V, or 3.6V) matched to its characteristics, optimizing energy efficiency and reducing heat generation while maintaining manageable circuit complexity through systematic voltage level assignment.
2Loss of energy
If different driving voltages are supplied to each LED, then energy efficiency improves, but device complexity increases
Solution Approach 1:
The patent segments the LED module into multiple voltage groups, where LEDs with similar driving voltage requirements are assigned to the same ground potential level. This segmentation approach (e.g., grouping LEDs by 3.0V, 3.3V, or 3.6V requirements) reduces the overall complexity compared to individually managing each LED, while still achieving optimized energy efficiency for each group.
3Ease of manufacture
If uniform voltage is applied to all LEDs, then manufacturing is easier, but heat generation and durability are compromised
Solution Approach 1:
The patent changes the voltage parameter assigned to each LED based on its specific driving characteristics. By adjusting the ground potential to match each LED's optimal operating voltage, the system achieves both manufacturing feasibility (through standardized voltage levels) and enhanced reliability (by preventing overheating and extending LED lifespan).
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
This approach reduces heat generation, increases energy efficiency, and enhances the durability and reliability of the display apparatus by optimizing voltage application to each LED, thereby improving performance and compatibility among LEDs with different driving voltages.
Implementation Method 1
a first light emitting diode LED having a first forward voltage and a second light emitting diode LED having a second forward voltage that is less than the first forward voltage
Implementation Method 2
a common anode node that connects an anode of the first LED to an anode of the second LED
Data Source
Figure 1A
Figure 1B
Figure 2
AI summary
A display apparatus (2) is provided in which different driving voltages are supplied to each of a plurality of light emitting diodes, LEDs, by changing ground potentials of the plurality of LEDs included in an LED component, and a method of controlling the same. The display apparatus (2) includes an LED component including a first LED (212) having a first driving voltage and a second LED (211) having a second driving voltage less than the first driving voltage, a common anode node (213) which connects an anode (212a) of the first LED (212) to an anode (211a) of the second LED (211), and a power controller (410) which supplies different driving voltages to the first LED (212) and the second LED (211) through the common anode node.