Liquid Crystal Panel Single Polarizer Optical Efficiency
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Solution Overview
Problem
Conventional liquid crystal panels suffer from significant optical efficiency loss due to multiple polarizers, resulting in low optical transmission and reduced display performance.
Innovation Solution
A liquid crystal panel design with a reduced number of polarizers, featuring an upper substrate, a lower substrate with a polarizer, a liquid crystal layer, and independently driven stripe-shaped pixel electrodes made of transparent conductive material, which form equivalent lenses or prisms to control light path and brightness by varying voltages applied to the electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional liquid crystal panel uses multiple polarizers (upper polarizer and lower polarizer), then the display can achieve grayscale display through polarization state conversion, but the optical efficiency loss exceeds 50% for each transmission through a polarizer layer resulting in low optical transmission
Solution Approach 1:
The patent removes one of the two polarizers from the conventional liquid crystal panel structure. Specifically, it eliminates either the upper polarizer or the lower polarizer, retaining only one polarizer layer. This extraction of the unnecessary polarizer component directly reduces optical efficiency loss while maintaining the display's grayscale capability through alternative means such as controlling liquid crystal molecular orientation and optical path length.
Solution Approach 2:
The patent makes the liquid crystal layer perform multiple functions: it not only controls polarization state conversion but also controls the optical path length and acts as an equivalent lens or prism. By making the liquid crystal layer multi-functional, the patent compensates for the removed polarizer and maintains grayscale display capability without requiring both traditional polarizer layers.
2Ease of operation
If conventional liquid crystal panel uses upper polarizer and lower polarizer with perpendicular light transmission directions, then the display principle can be achieved through polarization conversion, but the optical transmission becomes low due to cumulative optical efficiency loss
Solution Approach 1:
The patent extracts and removes one polarizer from the conventional two-polarizer system. By retaining only a single polarizer layer with perpendicular light transmission direction relative to the liquid crystal layer's initial state, the patent maintains the essential display principle while eliminating the cumulative optical efficiency loss that occurs when light passes through multiple polarizer layers.
3Loss of energy
If the patent reduces the number of polarizers to one layer, then optical efficiency and transmissivity are improved, but the display must rely on alternative mechanisms such as voltage-controlled liquid crystal molecular orientation and equivalent lens formation
Solution Approach 1:
The patent introduces dynamic control of the liquid crystal layer through voltage application. By applying different voltages to pixel electrodes, the liquid crystal molecules can be dynamically oriented to control optical path length and form equivalent lenses or prisms. This dynamic mechanism replaces the static dual-polarizer system, achieving optical efficiency improvement while managing control complexity through electronic control rather than additional optical components.
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 design enhances optical efficiency and transmissivity by eliminating the need for one polarizer layer, allowing for improved grayscale and color display with higher resolution and energy efficiency.
Implementation Method 1
liquid crystal molecules in the liquid crystal layer convert the linearly polarized light into elliptically polarized light by changing its polarization states when being driven by a voltage
Implementation Method 2
liquid crystal molecules in the liquid crystal layer in a region corresponding to each of the sub-pixels are configured to form an equivalent lens when voltages are applied to the plurality of pixel electrodes arranged in the region corresponding to the sub-pixel
Implementation Method 3
the lower polarizer converts natural light into linearly polarized light
Data Source
AI summary
The present disclosure provides a liquid crystal panel, a display apparatus and a display method, which relate to the display field, and may reduce the number of polarizers, increase transmissivity of the display device and enhance the optical efficiency of the display device. The liquid crystal panel includes: an upper substrate; a lower substrate; a liquid crystal layer sandwiched between the upper substrate and the lower substrate; a polarizer arranged on a side of the lower substrate facing away from the liquid crystal layer; a common electrode arranged on the upper substrate; and a plurality of pixel electrodes which are arranged on the lower substrate in a region corresponding to each of the sub-pixels and are configured to be driven independently.