Shared Sensor Driving Circuit for Multi-Panel Display Sensing
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Solution Overview
Problem
The increasing demand for display devices with multiple display panels is hindered by the increased cost and power consumption associated with using multiple integrated chips (ICs) for each panel.
Innovation Solution
A sensor driving circuit and display device configuration that includes separate sensor drivers for each panel, with shared digital signal processing, allowing for selective operation of analog front ends and converters based on mode settings, reducing IC complexity and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple integrated chips (ICs) are provided for multiple display panels, then each panel can have dedicated sensor processing capability, but cost and power consumption increase
Solution Approach 1:
The patent merges the digital signal processor and memory into a single shared resource that serves multiple sensor drivers. The first sensor driver includes a digital signal processor and memory, while the second sensor driver shares these components. This consolidation reduces the total number of ICs and lowers power consumption while maintaining the ability to process sensing information from multiple display panels.
Solution Approach 2:
The shared digital signal processor is designed to handle sensing information from both the first and second sensor units. The processor can be configured to process data from either sensor driver, making it a universal component that performs multiple functions. This multi-functionality eliminates the need for separate dedicated processors for each display panel.
2Reliability
If multiple integrated chips (ICs) are provided for multiple display panels, then each panel can have dedicated sensor processing capability, but cost increases
Solution Approach 1:
The patent consolidates multiple IC functions into fewer chips. The first sensor driver integrates an analog front end, analog-to-digital converter, and shares a digital signal processor with the second sensor driver. This merging reduces the total component count and manufacturing cost while maintaining full sensor processing capability across multiple display panels.
3Device complexity
If a shared digital signal processor is used for multiple sensor drivers, then IC complexity is reduced, but processing capacity must be sufficient for all panels
Solution Approach 1:
The shared digital signal processor is designed with dynamic configurability to adapt to different processing loads. The processor can be allocated to handle sensing information from one or multiple sensor drivers depending on the operational mode. This dynamic allocation ensures sufficient processing capacity while maintaining reduced IC complexity.
Data Source
AI summary
A display device includes: a first sensor driver connected to a first sensor unit including a first-analog-front end, a first analog-to-digital converter, and a digital signal processor; and a second sensor driver connected to a second sensor unit including a second-analog-front end, and a second analog-to-digital converter. In a first mode, the first-analog-front end and the first analog-to-digital converter generate first sensing information for the first sensor unit, the second sensor driver does not operate, and the digital signal processor processes the first sensing information based on a first setting value for the first sensor unit. In a second mode, the first-analog-front end and the first analog-to-digital converter do not operate, the second-analog-front end and the second analog-to-digital converter generate second sensing information for the second sensor unit, and the digital signal processor processes the second sensing information based on a second setting value for the second sensor unit.