Sensor Driver Sensing Frequency and Voltage Adjustment
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Solution Overview
Problem
Current display devices face challenges in effectively determining whether an object is in proximity and accurately detecting the release of an object, particularly in varying sensing modes, due to limitations in sensing frequency, area, and synchronization with timing signals.
Innovation Solution
A display device and driving method that utilize a sensor driver to transmit sensing signals to different numbers of sensors in various modes, adjusting sensing frequency, area, and synchronization with timing signals to enhance proximity detection and object release detection, with the sensor driver setting distinct parameters for each mode to optimize sensing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensing signal is transmitted to all sensors continuously at high frequency, then the proximity detection accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent applies dynamics by making the sensing frequency adjustable based on operational mode. The sensor driver dynamically changes the sensing frequency between first, second, and third modes, transmitting signals at different frequencies to different groups of sensors. This dynamic adjustment allows the system to maintain high detection accuracy when needed while reducing power consumption during normal operation.
Solution Approach 2:
The patent segments the sensor array into multiple groups that are activated differently across modes. Instead of continuously activating all sensors, the system divides sensors into sets that are selectively enabled, allowing high-precision detection on specific sensor groups while leaving others inactive to conserve power.
2Measurement precision
If the sensing frequency is increased to improve detection speed, then the object release detection accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent implements periodic action by using different sensing frequencies for different modes. The sensor driver periodically switches between first, second, and third modes, each with distinct sensing frequencies. This periodic variation in frequency allows the system to achieve high detection accuracy for object release events while maintaining lower average power consumption through strategic use of high-frequency sensing only when necessary.
3Area of stationary object
If the sensing area is expanded to cover the entire sensor part, then the detection coverage is improved, but the power consumption increases
Solution Approach 1:
The patent applies local quality by enabling different sensing areas for different modes. The sensor driver selectively activates specific regions of the sensor array based on operational requirements. In certain modes, only specific sensor groups are activated rather than the entire sensor part, allowing the system to maintain adequate detection coverage while reducing power consumption by keeping portions of the sensor array inactive.
4Reliability
If the sensing signal voltage is increased to improve signal strength, then the detection reliability is improved, but the power consumption increases
Solution Approach 1:
The patent implements parameter changes by adjusting the voltage level of the sensing signal according to operational mode. The sensor driver changes voltage parameters dynamically, applying higher voltages only when detection reliability is critical and using lower voltages during normal operation. This parameter adjustment allows the system to maintain detection reliability when needed while reducing power consumption through optimized voltage levels.
Data Source
AI summary
A display device including: a pixel part including pixels; a sensor part overlapping the pixel part and including sensors; and a sensor driver that transmits a sensing signal to p sensors in a first area of the sensor part in a first mode, transmits the sensing signal to q sensors in the first area in a second mode, and transmits the sensing signal to r sensors in the first area in a third mode, wherein p is an integer greater than 0, q and r are integers greater than p, and the sensor driver sets a sensing frequency, the first area, the number of sensing times per sensing frame period, whether or not the sensor driver is synchronized with a timing signal of the pixel part, or a voltage level of the sensing signal, to be different in the second mode and the third mode.