Display Panel Power Supply Unit Parasitic Capacitance Recovery
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Solution Overview
Problem
Conventional display panels suffer from significant power loss due to parasitic capacitance in power supply lines, which increases with panel size, compromising efficiency.
Innovation Solution
A display panel configuration that includes a power supply unit with an inductor, capacitors, and switch elements to accumulate and regenerate power, reducing parasitic capacitance charging losses by switching between conducting and non-conducting states to manage power supply voltages effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the panel size is increased, then the display area is improved, but the power loss due to parasitic capacitance of power supply lines increases
Solution Approach 1:
The patent recovers the energy that was previously lost to parasitic capacitance charging in power supply lines. By capturing the charge from the parasitic capacitance and redirecting it to the light-emitting elements, the system converts what was harmful energy loss into useful light output, thereby reducing overall power consumption while maintaining large display area
Solution Approach 2:
The patent implements an energy recovery mechanism where charge that would normally be discarded when charging parasitic capacitance is instead captured and reused. The recovery circuit intercepts the charging current, stores it in a capacitor, and then releases it to drive the light-emitting elements, effectively recovering energy that would have been wasted
2Device complexity
If conventional power supply methods are used, then the circuit structure is simple, but power efficiency deteriorates due to parasitic capacitance charging loss
Solution Approach 1:
The patent introduces a recovery circuit as an intermediary component between the power supply and the light-emitting elements. This circuit includes a capacitor and switching elements that mediate the power flow, capturing charge from parasitic capacitance and redistributing it usefully. While this adds circuit complexity, it dramatically improves power efficiency by recovering otherwise lost energy
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 configuration significantly reduces power loss by collecting and regenerating power in both light-emitting and non-light-emitting periods, enhancing power efficiency in display panels.
Implementation Method 1
an inductor having a first terminal connected to the second power supply line
Implementation Method 2
a capacitor having a first electrode to which a constant voltage is applied
Data Source
AI summary
Display panel includes: a power supply unit that generates first power supply voltage and variable second power supply voltage; and first and second power supply lines that transmit the first and second power supply voltages, respectively, to light emitting elements. The power supply unit (i) includes: first and second input terminals; a switching control unit; an inductor having first terminal connected to the second power supply line; a first switch element that switches conduction/non-conduction between a second terminal of the inductor and the first input terminal; a second switch element that switches conduction/non-conduction between the second terminal and the second input terminal; a capacitor having first electrode to which constant voltage is applied; and a third switch element that switches conduction/non-conduction between the second terminal and a second electrode of the capacitor, and (ii) collects, into the capacitor, and regenerates power from parasitic capacitance of the second power supply line.