Infrared Light Guide Strip Heating for Cold Display Reliability
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Solution Overview
Problem
Liquid crystal display screens in electronic devices are severely affected by low temperatures, leading to issues such as long response times, afterimages, and contrast loss, making them unable to function properly in cold environments.
Innovation Solution
Incorporating an infrared light bead and a light guide strip in the display device, where the infrared light is emitted and diffused to heat the liquid crystal layer, ensuring the display panel can operate effectively even in low-temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the display device operates in low-temperature environment, then the liquid crystal response time increases and display performance deteriorates, but the device structure remains simple without heating components
Solution Approach 1:
The patent combines the heating function with the existing display structure by integrating an infrared light bead and light guide strip into the back plate assembly. The infrared light bead is positioned adjacent to the light guide strip, which directs infrared light through the liquid crystal layer, thereby merging thermal heating with the display's optical path structure.
Solution Approach 2:
The light guide strip serves dual functions: it guides visible light for display purposes and simultaneously directs infrared light for heating the liquid crystal layer. This multi-functionality allows the same structural component to address both display illumination and temperature maintenance needs.
2Temperature
If heating components are added to the display device, then the liquid crystal layer temperature can be maintained, but the device structure becomes more complex
Solution Approach 1:
The light guide strip acts as an intermediary component that transfers infrared light from the infrared light bead to the liquid crystal layer. Instead of directly heating the liquid crystal with a contact heating element, the infrared light serves as a non-contact thermal mediator, reducing structural complexity while achieving temperature control.
Solution Approach 2:
The patent replaces traditional mechanical contact heating systems with an optical-based heating approach using infrared light. This substitution eliminates the need for complex thermal conduction structures, insulation layers, and contact heating elements, simplifying the overall device structure while maintaining effective temperature control.
3Speed
If infrared light directly heats the liquid crystal layer, then response time improves, but optical film efficiency decreases due to light absorption
Solution Approach 1:
The patent segments the infrared light path by using the light guide strip to direct infrared light to specific regions of the liquid crystal layer. This segmentation allows controlled heating of the liquid crystal without requiring intense infrared radiation across the entire display area, thereby reducing overall energy loss while maintaining effective heating where needed.
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 enables the display panel to maintain normal operation and rapid temperature rise in low-temperature environments, reducing optical losses and ensuring the device functions correctly.
Implementation Method 1
The infrared light bead is configured to emit infrared light. The infrared light emitted by the infrared light bead enters the light guide strip via the first light-incident surface of the light guide strip, and exits the light guide strip via the light-exiting surface. The infrared light emitted from the light-exiting surface at least partially avoids the optical film and is incident on the liquid crystal layer of the display panel, to heat the liquid crystal layer of the display panel.
Data Source
AI summary
A display device and an electronic device are provided. The display device includes a back plate, a display panel, an optical film, a light guide strip, and an infrared light bead. The display panel is carried on the back plate and includes a liquid crystal layer. The optical film is disposed at one side of the display panel adjacent to the back plate. The light guide strip has a first light-incident surface and a light-exiting surface. The first light-incident surface is connected to the light-exiting surface in a bent manner. The infrared light bead is accommodated in the back plate. The infrared light bead is configured to emit infrared light. The infrared light bead is disposed close to the first light-incident surface of the light guide strip.