Display Substrate With Embedded Ambient Sensor
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Solution Overview
Problem
Existing display technologies face challenges in integrating ambient sensors into full-screen displays without compromising the screen-to-body ratio or affecting the light emission of light-emitting devices.
Innovation Solution
A display substrate design that incorporates ambient sensors between layers of light-emitting devices and a base substrate, allowing for ambient light detection without blocking light emission, and includes a color filter layer to adjust brightness and white balance based on ambient light color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If ambient sensors are integrated into the display area to eliminate separate sensor holes, then the screen-to-body ratio is improved, but the light emission quality may be affected
Solution Approach 1:
The ambient sensor is relocated from a separate hole in the display surface to an integrated position within the display area, utilizing the vertical stacking dimension. The sensor is positioned between the light-emitting device layer and the base substrate, allowing it to operate within the display structure without compromising the front display surface integrity.
Solution Approach 2:
The ambient sensor is nested within the display structure by placing it between the light-emitting device layer and the base substrate. The sensor occupies space within the existing display layers rather than requiring additional external space, effectively integrating multiple functions (display and ambient sensing) into a single structure.
2Area of stationary object
If ambient sensors are placed below light-emitting devices, then the display area can be fully utilized, but the sensors may be affected by light emission
Solution Approach 1:
The color filter layer is applied locally above the ambient sensor to selectively transmit ambient light wavelengths while blocking the light emission wavelengths from the light-emitting devices. This local modification allows the sensor to function correctly in its specific position without being affected by the light emission, while the rest of the display maintains its normal light emission characteristics.
3Measurement precision
If the orthographic projection of ambient sensor covers the light-emitting device, then ambient light detection is effective, but the light transmission to camera module may be blocked
Solution Approach 1:
The color filter layer is selectively positioned above the ambient sensor to transmit ambient light wavelengths while blocking the light emission wavelengths. This allows the sensor to effectively detect ambient light even when positioned below the light-emitting device, while simultaneously preventing the sensor structure from blocking the light transmission path to the camera module through the wavelength-selective filtering.
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
This solution enhances the screen-to-body ratio by eliminating the need for separate ambient sensor holes, ensures effective ambient light detection and adjustment, and maintains the light emission quality of the display.
Implementation Method 1
detecting ambient light brightness by the ambient sensor
Implementation Method 2
driving a light-emitting device to emit light for screen display
Data Source
AI summary
Disclosed are a display substrate, driving method and a display device. The display substrate includes: a substrate base including a first display area and a second display area; the plurality of light-emitting devices include a plurality of first light-emitting devices in the first display area and a plurality of second light-emitting devices in the second display area, and the density of the plurality of first light-emitting devices in the first display area is less than or equal to that of the plurality of second light-emitting devices in the second display area; and the plurality of ambient sensors are in the first display area and below at least part of the first light-emitting devices, and the orthographic projections of the ambient sensor on the substrate base covers and is greater than the orthographic projections of the corresponding first light-emitting devices on the substrate base.