Display Device Sensor Controller Mode Switching
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Solution Overview
Problem
Current display devices face challenges in effectively sensing inputs from both passive-type and active-type input devices, particularly in efficiently switching between different operation modes to optimize sensing performance and reduce unnecessary operations.
Innovation Solution
A display device with an input sensor that operates in two distinct modes, utilizing a sensor layer with crossing electrodes and a sensor controller that adjusts its operation time based on the mode, allowing for efficient sensing of inputs by switching between first and second driving modes depending on the presence and type of input detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor controller operates in the first mode during successive sensing periods, then the sensing capability for passive-type input devices is improved, but the operation time increases
Solution Approach 1:
The sensor controller dynamically switches between first mode and second mode based on the type of input device detected. When an active-type input device is detected, the controller transitions to second mode with shorter operation time. When a passive-type input device is detected or no input device is present, the controller operates in first mode with longer operation time for enhanced sensing capability.
Solution Approach 2:
The controller changes the operation time parameter based on the detected input device type. In first mode, the operation time is set to a longer duration to enhance sensing precision for passive-type devices. In second mode, the operation time is reduced when active-type devices are detected, thereby optimizing performance while reducing unnecessary operation time.
2Duration of action of moving object
If the sensor controller operates in the second mode during successive sensing periods, then the operation time is reduced, but the sensing capability for active-type input devices may be compromised
Solution Approach 1:
The sensor controller adaptively adjusts its operation mode based on real-time detection of input device types. The controller monitors the sensing periods and determines whether an active-type or passive-type input device is present, then dynamically switches between second mode (shorter operation time) and first mode (longer operation time) accordingly.
Solution Approach 2:
The controller modifies the operation time parameter based on the detected input device characteristics. When active-type input devices are detected, the operation time is shortened to reduce unnecessary operations. When passive-type devices are detected, the operation time is extended to maintain adequate sensing capability.
3Measurement precision
If the sensor controller continuously operates in the first mode, then the sensing precision is maintained, but the energy consumption increases
Solution Approach 1:
The sensor controller implements periodic switching between first mode and second mode based on the type of input device detected. Instead of continuously operating in first mode, the controller periodically evaluates the input device type and adjusts the operation mode accordingly, thereby maintaining sensing precision when needed while reducing energy consumption during periods when active-type devices are present.
Solution Approach 2:
The controller dynamically changes the operation time parameter to optimize the balance between sensing precision and energy consumption. By extending operation time in first mode for passive-type devices and reducing operation time in second mode for active-type devices, the system maintains adequate sensing precision while minimizing unnecessary energy consumption.
4Productivity
If the sensor controller switches between modes based on input device type, then the overall performance is optimized, but the device complexity increases
Solution Approach 1:
The sensor controller is designed with multi-functionality to handle both passive-type and active-type input devices using a unified control architecture. The same sensor controller performs sensing operations for different input device types by switching between first mode and second mode, rather than requiring separate dedicated controllers for each device type, thereby optimizing performance while limiting the increase in device complexity.
Solution Approach 2:
The sensor controller implements dynamic mode switching capability that allows it to adapt its operation based on the detected input device type. This dynamic behavior enables the controller to optimize performance for different device types while maintaining a single versatile controller rather than multiple specialized controllers, thus improving overall performance with minimal increase in device complexity.
Data Source
AI summary
An display device, includes: an input sensor including: a sensor controller configured to operate in a first mode, in which the first electrode and the second electrode are operated as different groups, or in a second mode, in which the first electrode and the second electrode are operated as a same group, wherein the sensor controller is configured to have an operation time of the first mode, which is longer than an operation time of the second mode, in response to the input sensor operating in the first driving mode during successive sensing periods of a first group, and the sensor controller is configured to have the operation time of the second mode, which is longer than the operation time of the first mode, in response to the input sensor operating in the second driving mode during successive sensing periods of a second group.