Field Sequential LCD Blank Period Multiplexing
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Solution Overview
Problem
Current display technologies face challenges in achieving high brightness while minimizing power consumption, particularly in field sequential liquid crystal display devices, where the brightness of white light passing through color filters is reduced, leading to increased power consumption and cost. Additionally, there is a need to enhance the functionality of color sequence displays by utilizing the blank periods more effectively.
Innovation Solution
A field sequential liquid crystal display device that incorporates a liquid crystal display module with display data writing and blank periods, utilizing a functional module to detect data during blank periods, and a field sequential backlight module that provides backlight during these periods. The device includes an optical fingerprint recognition module using the backlight as a light source, a capacitive touch module, and multiplexes the common electrode as a touch electrode to detect touch data during blank periods, optimizing the utilization of blank periods for improved functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a color film layer is used to display color images, then color display capability is improved, but brightness is greatly reduced and power consumption increases
Solution Approach 1:
The patent removes the color film layer from the display structure, extracting the problematic component that caused brightness reduction and high power consumption. Instead of using a color film layer with red, green, and blue color resistors, the invention uses a field sequential backlight module that sequentially displays red, green, and blue sub-frames without requiring color filters, thereby achieving color display while maintaining high brightness and low power consumption.
2Adaptability or versatility
If the blank period is used for functional data detection, then device functionality is improved, but the display data writing time is reduced
Solution Approach 1:
The patent dynamically adjusts the timing parameters of the display module by setting the blank period duration to be longer than the display data writing period duration. This dynamic timing configuration allows functional data detection to occur during the extended blank period without compromising the display data writing time, as the blank period is intentionally designed to be sufficiently long to accommodate both functional detection and subsequent display operations.
3Measurement precision
If the backlight duration is extended to match the liquid crystal response period, then detection accuracy is improved, but energy consumption increases
Solution Approach 1:
The patent applies preliminary action by turning on the backlight module before the functional data detection begins and keeping it on throughout the entire liquid crystal response period. This ensures that the liquid crystal molecules have sufficient illumination during their response time, improving detection accuracy. The backlight is turned off after the response period ends, minimizing energy consumption while maintaining adequate illumination for the required detection duration.
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 enhances the utilization of blank periods, reduces power consumption by extending backlight duration, and improves the accuracy of fingerprint and touch data detection, providing a more efficient and cost-effective display solution with enhanced functionality.
Implementation Method 1
a liquid crystal display module comprising a liquid crystal layer
Implementation Method 2
a field sequential backlight module configured to provide backlight during a plurality of backlight turned-on periods, and each of the plurality of backlight turned-on periods is within one of the plurality of blank periods
Data Source
AI summary
The present application provides a field sequential liquid crystal display device. The field sequential liquid crystal display device includes a liquid crystal display module including a plurality of display data writing periods and a plurality of blank periods, wherein between every two adjacent ones of the display data writing periods is provided with one of the plurality of blank periods, and the liquid crystal display module is configured to receive a display data during the plurality of the display data writing periods; and a functional module is configured to detect a functional data in at least one of the plurality of blank periods.