Flat Panel Display Column Driver Signal Synthesis
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Solution Overview
Problem
Conventional flat panel displays face issues with increased power consumption and electromagnetic interference (EMI) due to the transmission of digital image data and control signals via multiple signal lines and clock lines.
Innovation Solution
A flat panel display design that includes a signal controller generating synthesized signals, which reduces the number of signal lines needed by using a polarity control signal and load signal transmitted via different data buses, and employs a column driver with a digital signal generator, shift register, data latch, D/A converter, and output buffer, operating in a current driving scheme to apply analogue data voltages to data lines, thereby minimizing power consumption and EMI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If digital image data and control signals are transmitted via multiple signal lines and clock lines, then data transmission capability is improved, but power consumption and electromagnetic interference increase
Solution Approach 1:
The patent merges control signals (horizontal synchronization start signal, load signal, polarity control signal) with digital image data transmission by utilizing the same data lines. The signal controller generates these control signals based on the timing and state of data transmission, eliminating the need for separate dedicated control signal lines. This consolidation reduces the total number of signal lines, thereby reducing power consumption and electromagnetic interference while maintaining complete data transmission functionality.
Solution Approach 2:
The data lines serve multiple functions: they transmit digital image data from the signal controller to the column driver, and simultaneously carry control signals (horizontal synchronization start signal, load signal, polarity control signal) for coordinating the transmission timing and state. This multi-functional use of data lines eliminates the need for separate control signal lines, reducing overall system complexity and power consumption while maintaining full data transmission capability.
2Loss of information
If multiple signal lines and clock lines are used for data transmission, then data transmission capability is improved, but electromagnetic interference increases
Solution Approach 1:
The patent combines control signal transmission with data transmission on the same data lines. The signal controller generates control signals (horizontal synchronization start signal, load signal, polarity control signal) that are transmitted alongside digital image data through the same physical lines. This merging reduces the number of concurrent signal transmissions across different lines, thereby reducing electromagnetic interference while preserving complete data transmission functionality.
Solution Approach 2:
The data lines function as universal transmission medium carrying both digital image data and control signals. This multi-functional approach eliminates the need for separate dedicated control signal lines, reducing the total number of signal lines and consequently reducing electromagnetic interference in the system while maintaining full data transmission capability.
3Reliability
If multiple dedicated control signal lines are used, then control signal transmission is improved, but device complexity increases
Solution Approach 1:
The patent merges control signal transmission with data transmission by utilizing the same data lines for both purposes. The signal controller generates control signals (horizontal synchronization start signal, load signal, polarity control signal) that are transmitted through the data lines alongside digital image data. This consolidation eliminates the need for separate dedicated control signal lines, reducing device complexity while maintaining reliable control signal transmission through proper timing and state coordination.
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 reduces power consumption and electromagnetic interference by minimizing the number of signal lines and buses, improving the performance of the flat panel display and ensuring sufficient driving margin through higher frequency control signal outputs.
Implementation Method 1
The D/A converter 1250 converts the digital image data into the analogue data voltages
Data Source
AI summary
A flat panel display includes a panel assembly provided with a plurality of gate lines, a plurality of data lines and switching elements connected to the gate lines and the data lines; a signal controller synthesizing digital image data and control signals from an external device and generating synthesized signals and gate control signals; a column driver applying analogue data voltages corresponding to the digital image data to the data lines responsive to the synthesized signals; and a gate driver applying the gate control signals to the gate lines.