Display device and method of driving the same
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Solution Overview
Problem
Existing display devices face challenges in reducing the size of circuit elements and increasing the size of the display panel due to separate design of illuminance, light, and fingerprint sensors, which also require complex control signals.
Innovation Solution
Integrating illuminance, light, and fingerprint sensors with a common configuration and control line, utilizing a reset circuit to apply different reset signals for various sensing modes, and employing a readout circuit to generate sensing information from multiple light sensors groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If illuminance sensor, light sensor, and fingerprint sensor are designed as independent components, then each sensor can be optimized for its specific function, but the overall device size increases and control complexity increases
Solution Approach 1:
The patent combines illuminance sensor, light sensor, and fingerprint sensor into a single integrated sensor unit. This merging reduces the overall device size and simplifies the control system by using a single sensor structure to perform multiple sensing functions that were previously requiring separate components.
Solution Approach 2:
The integrated sensor is designed to perform multiple functions: illuminance sensing, light color sensing, and fingerprint sensing. By making the sensor universal, the patent eliminates the need for separate dedicated sensors for each function, thereby reducing device complexity while maintaining optimization for each specific sensing task.
2Ease of operation
If separate control lines are used for each sensor type, then each sensor can be controlled independently with optimized signals, but the number of control lines increases
Solution Approach 1:
The patent uses a single reset line that serves all three sensing functions (illuminance, light color, and fingerprint sensing). This universal control approach reduces the number of control lines while maintaining the ability to independently control each sensor type through mode selection signals that direct the integrated sensor to perform specific functions.
3Measurement precision
If different sensor configurations are used for illuminance, light, and fingerprint sensing, then each sensing function can be optimized, but the manufacturing process becomes more complex
Solution Approach 1:
The patent merges multiple sensing functions into a single sensor structure with unified manufacturing processes. The integrated sensor uses the same fabrication steps for all sensing elements, eliminating the need for separate manufacturing lines and reducing overall manufacturing complexity while maintaining precision for each sensing function through optimized sensor design.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables compact display design with simplified control signals, allowing automatic luminance and color adjustment based on ambient light and user authentication through integrated sensor operations.
Implementation Method 1
first light sensors located in the first area, connected to the scan lines, and including first light receiving elements; and second light sensors located in the second area, connected to the scan lines, and including second light receiving elements
Data Source
AI summary
A display device includes a display panel including first and second areas. The display panel includes: pixels located in the first and second areas and connected to scan lines, and including light emitting elements; first light sensors located in the first area and connected to the scan lines, and including first light receiving elements; and second light sensors located in the second area and connected to the scan lines, and including second light receiving elements. The first and second light sensors are connected to a reset line. A reset signal of a first pattern is applied to the reset line in a first mode in which sensing information is generated based on the first light sensors. The reset signal of a second pattern is applied to the reset line in a second mode in which sensing information is generated based on the second light sensors.