Display Panel Neutralizing Capacitor High Refresh Rate

Solution Overview

Problem

Existing display technologies with high refresh rates require advanced chip specifications, are costly, and consume high power, making them inefficient for achieving high display frequencies with low-frequency display signals.

Innovation Solution

A display panel design that includes multiple scan lines, data lines, pixel circuits with switch units, liquid crystal capacitors, storage capacitors, and neutralizing capacitors, along with a control circuit that charges and neutralizes these capacitors to achieve a higher display frequency than the input display signal frequency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If the signal source directly sends display data with a high refresh rate and the display panel directly displays images at a high refresh rate, then the display refresh rate is improved, but the chip specification requirements increase, cost increases, and power consumption increases

Engineering Contradiction:

Improvedisplay refresh rateVSAvoidpower consumption

Core Design Contradiction:

SpeedVSUse of energy by moving object

Solution Approach 1:

The patent segments the pixel circuit into multiple independent switching units (first switching unit, second switching unit, third switching unit) that can be controlled separately. This allows the circuit to process low-frequency display data while internally generating high-frequency display updates by selectively activating different switching units at different time periods, thereby achieving high refresh rates without requiring the entire circuit to operate at high frequency continuously, reducing power consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements periodic action by dividing the display data processing into multiple time periods. During different time periods, different switching units are activated to charge the liquid crystal capacitor with the same display data. This periodic re-charging creates the effect of high-frequency display updates from low-frequency input data, achieving high refresh rates without proportionally increasing power consumption.

Inventive Principle:

Principle #19Periodic action

2Speed

If the signal source directly sends display data with a high refresh rate and the display panel directly displays images at a high refresh rate, then the display refresh rate is improved, but the chip specification requirements increase and cost increases

Engineering Contradiction:

Improvedisplay refresh rateVSAvoidchip specification requirements

Core Design Contradiction:

SpeedVSDevice complexity

Solution Approach 1:

The patent segments the pixel circuit into multiple independent switching units (first switching unit, second switching unit, third switching unit) that can be controlled separately. This allows the circuit to process low-frequency display data while internally generating high-frequency display updates by selectively activating different switching units at different time periods, thereby achieving high refresh rates without requiring the entire circuit to operate at high frequency continuously, reducing power consumption.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements periodic action by dividing the display data processing into multiple time periods. During different time periods, different switching units are activated to charge the liquid crystal capacitor with the same display data. This periodic re-charging creates the effect of high-frequency display updates from low-frequency input data, achieving high refresh rates without proportionally increasing power consumption.

Inventive Principle:

Principle #19Periodic action

3Speed

If the signal source sends display data with a low refresh rate and the display data is processed by a driver circuit in the display panel to multiply the frequency for display, then the display refresh rate is improved, but power consumption increases and costs increase

Engineering Contradiction:

Improvedisplay refresh rateVSAvoidmanufacturing cost

Core Design Contradiction:

SpeedVSEase of manufacture

Solution Approach 1:

The patent enables the pixel circuit to perform frequency multiplication functionality internally using its own components (multiple switching units and capacitors) without requiring an external dedicated frequency multiplication circuit. The pixel circuit itself serves the dual function of data storage and frequency multiplication, eliminating the need for additional expensive manufacturing processes and reducing overall system cost.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS12266323B2Display panel and driving method thereof, and electronic device

Publication Date: 2025.04.01 HKC CORP LTD

AI summary

The present disclosure provides a display panel, a driving method therefor, and an electronic device. The display panel includes multiple second scan lines, a pixel circuit further includes a second switch unit and a neutralizing capacitor, a control end of the second switch unit is electrically connected to a second scan line, a first terminal of the second switch unit is electrically connected to a second terminal of a first switch unit, and a second terminal of the second switch unit is electrically connected to one terminal of the neutralizing capacitor, and the other end of the neutralizing capacitor is electrically connected to a second common electrode. The control circuit is configured to obtain a display signal, and charges liquid crystal capacitors, storage capacitors, and neutralizing capacitors in each row according to the display signal, to enable the display panel to displays a frame at a first frequency.