Display Device Frequency Synchronization for Transparent Panels
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Solution Overview
Problem
Transparent display devices often suffer from image defects such as flicker or waterfall due to mismatched frequencies between the light source and the display panel, leading to unsatisfactory image quality.
Innovation Solution
Incorporating a frequency detector and control part that adjusts the frame frequency of the display device to match the alternating-current frequency, using a switching mode power supply circuit and DC-DC converter to generate appropriate voltages for the display panel, and employing a lookup table to store corresponding frequency values for optimal image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the display device uses a fixed frame frequency, then the device complexity is reduced, but image quality deteriorates due to frequency mismatch with the light source
Solution Approach 1:
The frame frequency of the display device is made dynamically adjustable rather than fixed. The control part changes the frame frequency based on the detected alternating-current frequency to match the light source, thereby improving image quality while managing complexity through adaptive control
Solution Approach 2:
A frequency detector is introduced to detect the alternating-current frequency, and this detected information is fed back to the control part which adjusts the frame frequency accordingly. This feedback mechanism ensures the display device synchronizes with the light source frequency, resolving the image quality issue
2Reliability
If the frame frequency is set to a multiple of alternating-current frequency, then image defects are prevented, but the adaptability to different power supply frequencies is reduced
Solution Approach 1:
The frame frequency is dynamically set based on the detected alternating-current frequency. By making the frame frequency adjustable to different multiples of the detected frequency, the system maintains reliability across different power supply frequencies while preserving adaptability
Solution Approach 2:
The frame frequency parameter is changed based on the alternating-current frequency parameter. The control part adjusts the frame frequency to be a multiple of the detected frequency, allowing the system to adapt to different power supply frequencies while preventing image defects
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
Prevents image defects by synchronizing the frame frequency with the alternating-current frequency, ensuring high-quality image display in transparent display devices.
Implementation Method 1
a frequency detector configured to detect a frequency of an alternating current power
Implementation Method 2
a switching mode power supply circuit configured to convert the alternating current power to a direct current power
Implementation Method 3
a DC-DC converter configured to generate a high power voltage and a low power voltage based on the direct current power
Data Source
AI summary
A display device may include a frequency detector, a control part, and a display panel. The frequency detector may receive an alternating current and may detect (and/or calculate) an alternating-current frequency associated with the alternating current. The control part may be electrically connected to the frequency detector and may generate a control signal using the alternating-current frequency. The display panel may be electrically connected to the control part and may display an image using the control signal.