Under-Display Sensor Window Layout for External Light Blocking
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Solution Overview
Problem
Display devices face challenges in enhancing external visibility while minimizing the influence of external light on their internal configuration, particularly in designs with transmission windows and sensor integration.
Innovation Solution
A display device design featuring a transmissive part for efficient light transmission, a light blocking layer, and a pixel defining layer that covers the thin film transistor layer to block external light, with a detour line and dummy line arrangement to optimize sensor placement and reduce light interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a transmissive part is formed in the display panel to allow light transmission for sensor operation, then external visibility and sensor functionality are improved, but external light interferes with the internal configuration and causes display defects
Solution Approach 1:
The pixel defining layer is selectively positioned to cover the thin film transistor layer only in regions where light blocking is needed, while leaving other regions transparent. This creates local differentiation in light transmission properties, allowing the transmissive part to maintain visibility and sensor functionality while the covered areas block external light from interfering with internal components.
2Object-affected harmful factors
If the pixel defining layer covers the thin film transistor layer to block external light, then external light interference is reduced, but light transmission efficiency decreases
Solution Approach 1:
The pixel defining layer is divided into multiple regions with different functions: one region covers the thin film transistor layer to block external light, while another region remains uncovered to maintain light transmission for sensor operation and display visibility. This segmentation allows simultaneous achievement of light blocking and light transmission requirements.
3Shape
If sensor devices are arranged to overlap with the display panel in holes at the front surface, then external visibility is enhanced, but the structural complexity increases
Solution Approach 1:
The sensor arrangement structure is merged with the display panel structure by forming holes in the front surface that align with sensor positions, and the pixel defining layer is integrated to provide both pixel definition and light blocking functions. This merging reduces the need for separate structural components and simplifies the overall device architecture.
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
Improves external visibility and reduces the impact of external light on the internal configuration, enhancing the display device's performance and usability.
Implementation Method 1
the pixel defining layer arranged in the first region covers at least a portion of the thin film transistor layer such that light provided through the transmissive part is blocked
Implementation Method 2
a first region including a transmissive part configured to transmit light provided from the outside
Data Source
AI summary
A display device includes: a display panel including a first region including a transmissive part configured to transmit light provided from the outside and a second region not including the transmissive part; and a sensor overlapping with the transmissive part, and configured to obtain electrical information based on information provided from the outside, wherein the display panel includes: a thin film transistor layer including a plurality of transistors; a pixel defining layer defining an emission region of a plurality of pixels; and a light blocking layer on the pixel defining layer, and defining the transmissive part, and wherein the pixel defining layer in the first region covers at least a portion of the thin film transistor layer such that light provided through the transmissive part is blocked.