Display Data Driver with TMC Decoding for WWAN Noise Reduction
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Solution Overview
Problem
Existing display apparatuses face challenges in reducing wireless wide area network (WWAN) noise, which affects display quality, particularly in devices with increased serviced frequency bands.
Innovation Solution
A data driver is designed with a simple structure to perform dithering and transition minimization coding (TMC), incorporating a receiver, TMC decoder, dithering adder, and voltage generator, which receives and processes clock signals and image data to generate data voltages, thereby reducing WWAN noise efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dithering and TMC are performed using conventional methods, then display quality can be improved, but the device structure becomes complex
Solution Approach 1:
The patent combines the dithering adder and TMC decoder into a single integrated data driver unit that processes both dithered original image data and TMC-encoded data simultaneously. This merging of functions allows the system to perform both dithering and transition minimization coding operations without requiring separate complex processing units, thereby improving display quality while maintaining relatively simple device structure.
Solution Approach 2:
The data driver is designed with multi-functionality to handle both dithering operations and TMC decoding operations within a single device. The universal design enables the same hardware components to process different types of image data (dithered original data and TMC-encoded data) through different processing paths, eliminating the need for dedicated separate processing units and reducing overall device complexity.
2Manufacturing precision
If WWAN noise is reduced through complex processing, then display quality improves, but processing time increases
Solution Approach 1:
The system performs preliminary dithering operations on the original image data before TMC encoding is applied. By pre-processing the image data with dithering patterns that are designed to minimize transitions, the subsequent TMC decoding process requires less complex noise filtering and processing, thereby reducing the overall processing time while still achieving effective WWAN noise reduction and maintaining display quality.
Data Source
AI summary
A data driver includes a receiver, a transition minimization coding (“TMC”) decoder, a dithering adder and a voltage generator. The receiver receives a clock signal and first image data which is generating by removing a dithering from a dithered original image data and performing a TMC. The TMC decoder removes the TMC from the first image data to generate second image data. The dithering adder restores the removed dithering based on the clock signal and the second image data to generate third image data. The voltage generator generates a plurality of data voltages based on the third image data.