The fusion of functionality and aesthetics in display design is paramount. Dead front displays epitomise this balance, seamlessly integrating into various applications while offering visually striking appeal. From kitchen appliances to home automation control panels, this cover lens technique not only serves a practical purpose but also enhances the overall look of the device.
Aesthetic Versatility and Tailored Finishes
There are virtually no limitations to the colours or patterns that can be produced on the cover lens.
Whether it’s a tinted cover glass, a mirror-like finish, or a textured wood grain effect, manufacturers can tailor the appearance to match specific applications and brand identities.
This level of customisation allows designers to create a cohesive look that aligns perfectly with their product’s aesthetic.
For instance, a sleek, modern appliance can be enhanced with a high-gloss finish, while a rustic home automation panel might benefit from a rich wood grain effect.
Such versatility ensures that the display is not merely an afterthought but a key element of the product design.
The Hidden Technology Behind the Aesthetic
The true magic of dead front displays lies in their ability to render the display area invisible until activated. This captivating effect is achieved through a sophisticated layering system that includes:
- Additive Colour Mixing Printed Layer: This layer is partially reflective, allowing incoming light to bounce back from the surface when the display is off, making it virtually invisible while leaving only the patterned or coloured layer visible.
- Separation Layer: This layer separates the various colours, enhancing the overall effectiveness of the display.
- Subtractive Colour Printed Layer: This layer predicts the spectral power distribution of light after it passes through successive layers of partially absorbing materials.
Each layer partially absorbs some wavelengths of light from the illumination spectrum while allowing others to pass through, resulting in a coloured appearance. Thus, when the display and backlight are turned on, the display content is revealed.#
For all-black dead front displays, tinted glass or dyed optical bonding adhesives can be utilized, while a white dead front display uses Seamless Transmitting Films (STF), complemented by customized patterns to mimic wood grain.
Drawbacks: Increased Power Requirements
Despite their remarkable aesthetic appeal, dead front displays have certain drawbacks. The additional filters and optical films necessitate a significantly higher backlight luminance than conventional displays—often two to three times brighter. This requirement can lead to increased power consumption, which may not be suitable for energy-conscious applications.
While the rewards of using dead front displays are compelling—providing a unique, appealing design that enhances user experience—the trade-off in power efficiency is an essential consideration for designers. It is vital to weigh the benefits against the increased backlight power requirements, ensuring that the final product aligns with both aesthetic aspirations and practical energy considerations.