HUD Scattering Panel Temperature Control
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Solution Overview
Problem
Conventional head-up display (HUD) systems face challenges in preventing further temperature increase when exposed to sunlight, leading to potential anomalies and reduced display quality, as existing temperature detection methods can only partially or fully shut down the system but not effectively control the temperature rise.
Innovation Solution
A display system comprising a transmissive liquid crystal display panel, a scattering panel with switchable light scattering and transmission areas, a temperature detector with resistor elements, and a controller that adjusts the scattering panel and light source operations based on temperature readings to manage heat, ensuring the scattering of sunlight and reducing temperature increments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the HUD device is exposed to sunlight condensed by the optical system, then the temperature of the exposed portion becomes high, but the HUD device may be adversely affected
Solution Approach 1:
The invention divides the temperature control approach into segmented regions by providing multiple scattering portions (first scattering portion and second scattering portion) that can be independently controlled. This allows selective scattering of sunlight in specific high-temperature regions without affecting the entire display area, thereby preventing localized overheating while maintaining overall system reliability.
Solution Approach 2:
The invention applies local quality by making different portions of the scattering panel have different light scattering properties. The first scattering portion and second scattering portion can be independently switched between light scattering and light transmission states based on local temperature conditions detected by respective temperature detection elements, enabling precise local temperature management.
2Measurement precision
If the temperature detection element detects temperature increase, then the system can identify high temperature, but conventional methods can only partially or fully shut down the HUD without preventing further temperature increase
Solution Approach 1:
The invention implements a feedback control mechanism where temperature detection elements continuously monitor temperature in real-time, and the controller adjusts the scattering portions based on detected temperature levels. When a temperature detection element detects that its corresponding region has reached a predetermined temperature, the controller activates the corresponding scattering portion to scatter incoming sunlight, creating a negative feedback loop that prevents further temperature increase.
Solution Approach 2:
The invention takes preliminary action by activating the scattering portions before the temperature reaches dangerous levels. The controller is configured to switch the scattering portions to light scattering state when temperature detection elements detect temperatures equal to or higher than predetermined thresholds, preventing further temperature rise before it can cause damage to the HUD device.
3Temperature
If the scattering portion scatters light to prevent temperature increase, then temperature control is improved, but the display quality may be affected
Solution Approach 1:
By segmenting the scattering panel into multiple independently controllable portions, the invention allows light scattering to be applied only to specific regions where temperature control is needed, while other regions continue to transmit light normally for display purposes. This minimizes the impact on overall display quality while achieving effective temperature management.
Solution Approach 2:
The invention applies partial action by activating only the necessary scattering portions rather than the entire scattering panel. When only specific regions require temperature control, only the corresponding scattering portions are switched to light scattering state, maintaining adequate illumination and display quality in other regions while still achieving temperature control 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 system effectively prevents further temperature increase by scattering sunlight when the temperature reaches a predetermined level, maintaining display quality and preventing anomalies, thereby ensuring reliable operation under high temperatures.
Implementation Method 1
a temperature detector having a temperature detection area in which a temperature detection resistor element is provided
Implementation Method 2
a scattering panel having a scattering area in which a scattering portion capable of being switched between scattering and transmission of light is provided
Data Source
AI summary
A display system includes: a transmissive liquid crystal display panel; a scattering panel having a scattering area provided with a scattering portion; a temperature detector having a temperature detection area provided with a resistor element; a light source configured to emit projection light to the liquid crystal display panel; and a controller configured to control operations of the scattering panel and the light source based on an output of the temperature detector corresponding to a temperature of the resistor element. A display area of the liquid crystal display panel, the scattering area, and the temperature detection area overlap one another. The projection light that has passed through the display area and the scattering area is projected onto a light-transmitting projection target. When an output indicating that the temperature of the resistor element is a predetermined temperature or higher is acquired, the controller causes the scattering portion to scatter light.