Liquid Crystal Light Control Layer for QD-OLED Glare Blocking
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Solution Overview
Problem
QD-OLED display devices experience glare when viewed obliquely due to external light excitation, and existing solutions to block glare reduce transmittance and increase power consumption.
Innovation Solution
A display panel with a light transmission control layer comprising a first common electrode, liquid crystal layer, and second common electrode, which form a preset electric field to control light transmittance based on the light emitting state, deflecting liquid crystal molecules to block external light when the display is not emitting light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a colour barrier is added to block external light, then glare is reduced, but transmittance decreases and power consumption increases
Solution Approach 1:
The patent applies a dynamic light transmission control layer that can switch between transparent and opaque states based on the display's emission state. When the display emits light, the control layer becomes transparent to allow light passage; when the display does not emit light, the control layer becomes opaque to block external light and prevent glare. This dynamic switching eliminates the need for continuous colour barriers, thereby reducing power consumption while maintaining glare prevention.
2Object-affected harmful factors
If a colour barrier is added to block external light, then glare is reduced, but transmittance decreases
Solution Approach 1:
The light transmission control layer dynamically adjusts its optical properties based on the display's emission state. During active emission, the layer transitions to a transparent state to maximize light transmittance and brightness. During inactive periods, it transitions to an opaque state to block external light and prevent glare. This dynamic behavior resolves the contradiction by providing glare protection only when necessary, thereby maintaining high transmittance during display operation.
3Object-affected harmful factors
If a colour barrier is added to block external light, then glare when viewed obliquely is reduced, but transmittance decreases
Solution Approach 1:
The control layer dynamically switches between transparent and opaque states based on the display's emission state rather than relying on fixed angular filtering. When the display is inactive, the opaque state blocks external light from all angles, preventing oblique viewing glare. When the display is active, the transparent state allows maximum light transmission regardless of viewing angle. This approach prevents oblique glare without the continuous transmittance penalty of fixed colour barriers.
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
The solution maintains high transmittance during emission while preventing glare from external light, even when viewed obliquely, without affecting the display's overall brightness or power consumption.
Implementation Method 1
The first common electrode and the second common electrode are used for selectively forming a preset electric field according to a light emitting state of the light emitting component
Implementation Method 2
The preset electric field is used for driving the plurality of liquid crystal molecules to deflect, so as to control a transmittance of the light transmission control layer
Implementation Method 3
when the light emitting component emits light, the light transmission control layer transmits light, so that the display panel has a higher transmittance
Implementation Method 4
when the light emitting component does not emit light, the light transmission control layer does not transmit light, so as to avoid a glare of the light emitting component caused by external light
Data Source
AI summary
The present disclosure provides a display panel. The display panel includes a light emitting component and a light transmission control layer located on a light emitting side of the light emitting component. The light transmission control layer includes a first common electrode, a liquid crystal layer and a second common electrode that are stacked on the light emitting side of the light emitting component in sequence. The liquid crystal layer includes a plurality of liquid crystal molecules. The first common electrode and the second common electrode are used for selectively forming a preset electric field according to a light emitting state of the light emitting component. The preset electric field is used for driving the plurality of liquid crystal molecules to deflect, so as to control a transmittance of the light transmission control layer. The present disclosure also provides a display device having the display panel.