Scanline Driver Chip Serial Data Deserialization for Bezel Reduction
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Solution Overview
Problem
The challenge in reducing the bezel size of display devices is that existing technologies require multiple parallel lines to transmit chip selection and address data, increasing the number of lines in the bezel and thus the device's size.
Innovation Solution
A scanline driver chip that receives serially-received chip selection and address data, using a chip selection de-serializer, address data de-serializer, and decoder-level shifter to provide a scanline enable signal, reducing the number of lines needed and thereby minimizing the bezel size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple parallel lines are used to transmit chip selection and address data, then data transmission reliability is improved, but the number of lines in the bezel increases and the device size increases
Solution Approach 1:
The patent transforms the data transmission method from parallel (multiple lines simultaneously) to serial (single line sequentially), changing the dimensional approach of signal transmission. This allows chip selection data and address data to be transmitted through a single line by sequentially sending data bits over time, thereby reducing the number of physical lines in the bezel while maintaining data transmission capability
Solution Approach 2:
The patent employs periodic clock signals to control the sequential transmission of data bits in serial mode. The chip selection de-serializer and address data de-serializer use clocked operations to systematically receive and process data bits one after another, ensuring reliable data transmission through time-division multiplexing rather than requiring simultaneous parallel lines
2Length of stationary object
If serial data transmission is used, then the number of lines in the bezel is reduced, but the complexity of data processing increases
Solution Approach 1:
The patent divides the data transmission and processing function into separate modular components: chip selection de-serializer for processing chip selection data, address data de-serializer for processing address data, and decoder-level shifter for scanline control. Each module handles specific data processing tasks independently, making the overall complex serial processing manageable through functional segmentation
Solution Approach 2:
The patent introduces de-serializer circuits as intermediary components between the serial data transmission line and the parallel data processing requirements. These intermediary devices convert serially transmitted data bits into parallel data formats needed by the display driver, bridging the gap between simplified transmission and complex processing requirements
3Quantity of substance
If the physical distance between driver chips and pixel array is reduced, then the number of lines required is decreased, but the manufacturing precision requirements increase
Solution Approach 1:
The patent extracts the data transmission function from multiple physical lines and consolidates it into a single serial transmission line. By removing the requirement for multiple parallel lines and replacing them with time-division multiplexed serial communication, the physical connection requirements are simplified, reducing manufacturing precision demands on line routing and connection positioning
Data Source
AI summary
A scanline driver chip includes: a chip selection de-serializer configured to provide an output enable signal based on an enable signal, a clock signal, and serial chip selection data, the serial chip selection data being received in serial order; an address data de-serializer configured to provide parallel address data based on the enable signal, the clock signal, the output enable signal, and serial address data, the serial address data being received in serial order; and a decoder-level shifter configured to provide a scanline enable signal based on the parallel address data. A display device includes: a controller configured to provide an enable signal, a clock signal, serial chip selection data, and serial address data; a plurality of the scanline driver chips each configured to provide a scanline enable signal; and a pixel array configured to be driven based on the scanline enable signal.