Display Device Cable Length Voltage Compensation
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Solution Overview
Problem
Display devices face challenges in efficiently managing power characteristics, particularly voltage, across varying cable lengths, which affects image brightness and power consumption, leading to inconsistent performance.
Innovation Solution
A display device with a controller that measures cable length and adjusts electric power properties, including voltage, by incorporating passive elements like resistors to ensure optimal power delivery based on cable impedance and length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a longer cable is used to connect the display panel and power supply, then the display device can be installed at greater distances, but the voltage of electric power supplied to the display panel decreases due to cable impedance
Solution Approach 1:
The controller performs preliminary action by measuring the cable length before power supply and pre-calculating the required voltage compensation. Based on the measured cable length, the controller determines the appropriate voltage level to compensate for the expected voltage drop, ensuring the display panel receives the correct voltage despite cable impedance.
Solution Approach 2:
The controller changes the voltage parameter of the electric power supplied to the cable based on the measured cable length. By adjusting the voltage parameter in accordance with cable length, the system compensates for voltage drops caused by cable impedance, maintaining stable power delivery to the display panel.
2Adaptability or versatility
If the cable length is increased, then installation flexibility is improved, but image brightness becomes inconsistent due to varying power characteristics
Solution Approach 1:
The system implements feedback by measuring the cable length and using this information to adjust the power supply voltage. The controller continuously monitors cable length and adjusts the voltage output accordingly, ensuring that the display panel receives sufficient power to maintain consistent image brightness regardless of cable length variations.
Solution Approach 2:
The controller changes the voltage parameter of electric power based on cable length measurements. This parameter adjustment ensures that even when cables of different lengths are used for installation flexibility, the display panel receives appropriate voltage levels, maintaining consistent image brightness and display quality.
3Adaptability or versatility
If cable length varies, then installation options increase, but power consumption becomes inefficient due to impedance losses
Solution Approach 1:
The controller performs preliminary measurement of cable length and pre-calculates the optimal voltage level before power supply. This preliminary action allows the system to minimize energy losses by providing exactly the right voltage compensation, avoiding excessive power consumption that would result from unadjusted voltage supply over long cables.
Solution Approach 2:
The controller adjusts the voltage parameter based on cable length to optimize power transmission efficiency. By changing the voltage parameter in accordance with cable impedance characteristics, the system minimizes energy losses while maintaining installation flexibility with varying cable lengths.
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 solution allows for precise control of power characteristics, maintaining image brightness and efficiency regardless of cable length, thereby enhancing display performance and reliability.
Implementation Method 1
a cable electrically connect the display unit and the control unit, the cable carrying the electric power and the signal
Implementation Method 2
the controller may be configured to: acquire the length of the cable; and control the control unit such that the electric voltage of the electric power is greater as the length of the cable is longer
Data Source
AI summary
A display device is disclosed. The display device of present invention comprises a display unit providing an image; a control unit placed spaced apart from the display unit, the control unit providing the display unit with a electric power and a signal; a cable electrically connect the display unit and the control unit, the cable carrying the electric power and the signal; and a controller configured to control a property of the electric power in accordance with a length of the cable.