Split Driver Chip for Silicon Display Cost Reduction
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Solution Overview
Problem
The manufacturing cost of silicon-based displays is increased due to the need for high-order processes for both driver chips and pixels, which are currently formed on the same substrate, and this hampers the improvement of product yield and display quality.
Innovation Solution
The driver chip is divided into a bridge chip and a screen driver chip, with the first signal processing circuit on a high-order process substrate and the second signal processing circuit on a low-order process substrate, allowing for different manufacturing processes and reducing the number of connection terminals and signal lines, thereby lowering costs and improving yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the driver chip and display screen are formed on the same silicon-based substrate using high-order processes, then the display effect is improved, but the manufacturing cost increases
Solution Approach 1:
The driver chip is divided into two separate substrates: a first substrate for the bridge chip containing high-speed signal processing circuits, and a second substrate for the screen driver chip containing low-speed signal processing circuits. This segmentation allows each substrate to be manufactured using appropriate process orders, reducing overall manufacturing cost while maintaining display quality.
2Manufacturing precision
If the driver chip and display screen are formed on the same silicon-based substrate using high-order processes, then the display effect is improved, but the product yield decreases
Solution Approach 1:
By dividing the driver chip into two separate substrates with different process requirements, the invention enables parallel manufacturing of both substrates using their respective optimal processes. This increases the overall product yield as failures in one substrate do not necessarily affect the other, while still achieving high display effect through the bridge chip's high-speed processing.
3Ease of manufacture
If the driver chip is divided into bridge chip and screen driver chip on different substrates, then the manufacturing cost is reduced, but the device complexity increases
Solution Approach 1:
The bridge chip acts as an intermediary between the external signal interface and the screen driver chip. It receives video signals, processes them at high speed, and outputs processed signals to the screen driver chip. This intermediary structure manages the complexity by separating high-speed and low-speed processing functions while maintaining a clear signal flow architecture.
4Ease of manufacture
If the number of signal lines and connection terminals between bridge chip and screen driver chip is reduced, then the manufacturing cost is reduced, but the signal transmission reliability may be compromised
Solution Approach 1:
The invention changes the transmission speed parameter of signals between the bridge chip and screen driver chip. The bridge chip processes video signals at high speed and outputs them at a lower speed to the screen driver chip, which then distributes them to pixel circuits. This parameter change allows for fewer, more reliable connections while maintaining overall system performance.
Data Source
AI summary
Provided are a driver chip, a display screen and a display device. The driver chip is configured to drive a silicon-based display screen, and the driver chip is composed of a bridge chip and a screen driver chip. A signal interface circuit of a first signal processing circuit in the bridge chip receives video signals of each frame of picture. A drive controller controls video signals of P pixels among the video signals of one frame of picture to be output at a first preset transmission speed to a second signal processing circuit of the screen driver chip each time. A signal processor of the second signal processing circuit in the screen driver chip converts the video signals of all of the P pixels into data drive signals and outputs at a second preset transmission speed data drive signals of Q pixels in one frame of picture to a data processing circuit each time. The data processing circuit is configured to convert the data drive signals into display driving signals, sequentially output the display driving signals to pixels in each row, and control each pixel.