Development of the Diffusive Microlens Array for Enhancing the Performance of Automotive Head-Up Displays
- Contributing to Enhanced Brightness and Reduced MURA of projected image -
Dexerials Corporation (Head Office: Shinagawa-ku, Tokyo, Representative Director and President: Yoshihisa Shinya, hereinafter called our company) announces that it has developed the Diffusive Microlens Array, which enhances the brightness of an automotive heads-up display (hereinafter called HUD) and reduces the MURA of projected image.
Today, more and more automobiles adopt HUDs, which project information on the windshield. Information projected on HUDs includes travel speed and temperature inside the car, and more recently also includes more safety-related information such as navigation and pedestrian detection, leading to growing market demands that various information be clearly displayed on them.
Our company has developed the Diffusive Microlens Array, a diffusive film that control the light distribution to obtain the HUD with high brightness and uniformity.
“Microlens Array” is literally arrayed micrometer-sized lenses and are formed on film substrate by our proprietary micro/nano-fabrication technology. Each lens is placed in arrangement and designed in shape to convert the incident light from LED to optimized light distribution on imaging display panel, and to enhance the brightness by 40% and uniformity of projected image.
In addition, the diffusive angle is controlled by precisely controlling the shape of the microlens array structure. This product therefore comes in three standard diffusive angles: 8°, 10°, and 12°. Customers can choose a product having the angle suited to their HUD design and can enhance the HUD performance just by replacing the existing diffuser film with the product.
- *1Based on our simulation conducted by replacing a common diffuser film (diffusive angle 5°, normal light distribution) with this product (diffusive angle 8°, top-hat distribution).
Details of Diffusive Microlens Array
- Diffusive Microlens Array
■Features of the product
- Microlens array formed by micro/nano-fabrication technology
Micolenses made of UV curing resin are formed on the base film by micro/nano-fabrication that is our core technology.
- Loss of light and MURA of projected image reduced by diffusive light distribution in a top-hat
Designed to achieve optimal light distribution characteristics, the microlens array structure diffuses light distribution in a top-hat shape. This makes the use of light more efficient and enhances the brightness because the loss of light is smaller compared to common diffuser films which diffuse light in a normal distribution (Gaussian distribution) form. Also, the nonuniformity in brightness reduces because the intensity of light can easily be adjusted.
Diffusive Microlens Array
|Typical diffusion film for HUD
(microparticle coating type)
Top-hat light distribution
A normal light distribution (Gaussian distribution)
|Loss of light is small.||Loss of light occurs on the ends.|
|Easy to attain constant intensity of light; brightness becomes more uniform.||Difficult to attain constant intensity of light; brightness is often nonuniform.|
- Design changes of the entire HUD are not necessary.
The product comes in standard diffusive angles of 8°, 10°, and 12°. Customers can choose a product having the diffusion angle suited to their HUD design and can enhance the HUD performance just by replacing the existing diffuser film with the product.
|Diffusive Microlens Array (this product)|
|Base film material||PET|
|Thickness of the base film||100μm|
|Standard diffusive angle||8°,10°,12°|
|Beam shape / Light distribution||Circular / Top-hat type*2 *3|
|Total transmittance||86% or more (diffusive angle 10°)|
*3 When collimated light is entered
[information] SID Display Week 2021
This product will be exhibited virtually online at SID Display Week 2021, from Monday, May 17th to Friday, May 21st. Please visit the event to see the product.
- Official website URL
- Admission registration page