Display Device Serial Control Line Merging
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Solution Overview
Problem
Existing display devices with distributed drivers face complexity in circuit design and data transmission, necessitating a solution to simplify these aspects.
Innovation Solution
A display device comprising a controller, power management circuit, and N display modules, where each module includes M driving circuits connected through serial control lines and a sharing data line, allowing the controller to address and read data from driving circuits using different duty cycles on the sharing data line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If distributed drivers are used in display device, then control flexibility and addressability are improved, but circuit design complexity and data transmission complexity increase
Solution Approach 1:
The patent combines multiple data lines into a single shared data line by encoding data with different duty cycles. Each driving circuit is assigned a unique duty cycle range, allowing the controller to communicate with multiple cascaded driving circuits through one data line, thereby reducing circuit complexity while maintaining distributed control flexibility.
Solution Approach 2:
The patent changes the duty cycle parameter of the data signal to encode different driving circuit addresses and data. By varying the duty cycle within specific ranges, the system can identify which driving circuit should process the signal and what operations to perform, enabling complex control through simple parameter modulation.
2Adaptability or versatility
If distributed drivers are used in display device, then control flexibility and addressability are improved, but data transmission complexity increases
Solution Approach 1:
Multiple data transmission channels are merged into a single shared data line by using duty cycle encoding. The controller can address and communicate with any of the M driving circuits in a display module through this single line by modulating the duty cycle, eliminating the need for separate data lines for each driving circuit.
Solution Approach 2:
The patent uses duty cycle parameter variation to encode address and data information. Different duty cycle ranges correspond to different driving circuits, and specific duty cycle values within those ranges encode operational data, allowing complex data transmission through simple temporal signal characteristics.
Data Source
AI summary
A display device includes a controller, a power management circuit and N display modules. Each of the N display modules includes M driving circuits, and M display arrays respectively connected to the M driving circuits. Each of the M driving circuits is configured to drive a display array connected to the driving circuit, and each of the display arrays includes at least one indicator light. The power management circuit is configured to output a voltage determined by the voltage control signal to the display arrays to supply power to the display array. M driving circuits in each of the display modules are cascaded through serial control lines. The controller is configured to address M driving circuits and read data of M driving circuits through the serial control lines, and send information to the driving circuits through the sharing data line to control the driving circuits and the indicator light.