Display Power Supply Switching for Peak Frame Power Demand
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Solution Overview
Problem
Existing power supply devices for high-definition organic light-emitting displays are large and expensive due to the need for high power supply, which limits their compactness and efficiency.
Innovation Solution
A power supply device that includes a first high-level voltage generator, a battery for generating a second high-level voltage, and a current sharing circuit to combine these voltages based on a switch signal, allowing for efficient power output to the display panel, with a controller determining the required power and managing battery state for optimal operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a power supply device is designed to supply high power for high-definition organic light-emitting displays, then the power output capability is improved, but the device size and manufacturing cost increase
Solution Approach 1:
The power supply device is divided into two separate power supply units: a first power supply unit for generating a first high-level voltage and a second power supply unit for generating a second high-level voltage. Each unit can operate independently or in combination, allowing the system to achieve high power output when needed while maintaining a compact form factor when lower power is sufficient.
Solution Approach 2:
The system dynamically switches between different power supply configurations based on the display panel's power requirements. The controller determines whether to use only the first power supply, only the second power supply, or both in combination, enabling adaptive power delivery that matches actual demand and avoids the need for a continuously oversized power supply device.
2Power
If a power supply device is designed to supply high power for high-definition organic light-emitting displays, then the power output capability is improved, but the manufacturing cost increases
Solution Approach 1:
The power supply device is divided into two separate power supply units: a first power supply unit for generating a first high-level voltage and a second power supply unit for generating a second high-level voltage. Each unit can operate independently or in combination, allowing the system to achieve high power output when needed while maintaining a compact form factor when lower power is sufficient.
Solution Approach 2:
The system changes operational parameters by switching between different voltage combinations (first high-level voltage alone, second high-level voltage alone, or both combined). This allows the same hardware configuration to deliver variable power levels, reducing the need for expensive high-power components that would be required if the system always operated at maximum power capacity.
3Device complexity
If a single power supply unit is used to supply all power, then the device structure is simple, but the power supply flexibility and efficiency decrease
Solution Approach 1:
The system dynamically switches between different power supply configurations based on the display panel's power requirements. The controller determines whether to use only the first power supply, only the second power supply, or both in combination, enabling adaptive power delivery that matches actual demand and avoids the need for a continuously oversized power supply device.
Solution Approach 2:
The two power supply units can serve multiple functions: the first power supply can operate alone for low-power modes, the second power supply can operate alone for medium-power modes, and both can operate in combination for high-power modes. This multi-functionality provides adaptability without requiring a completely different system architecture.
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 compact display apparatus with reduced manufacturing costs and size by efficiently managing power supply, allowing for high-definition displays with reduced power supply size and cost.
Implementation Method 1
a battery configured to generate a second high-level voltage
Data Source
AI summary
A disclosed display apparatus may include a display panel having a plurality of sub-pixels and configured to display an image based on an image signal provided to the display panel; a controller configured to determine a required power for at least one frame of the image signal and to output a switch signal based on determining if the required power is equal to or higher than a predetermined reference power; and a power supply device configured to receive an external AC power and to generate a first high-level voltage and a second high-level voltage. The power supply device may be further configured, based on the switch signal, to output the first high-level voltage to drive the display panel, or to combine the second high-level voltage with the first high-level voltage to generate a third high-level voltage and to output the third high-level voltage to drive the display panel.