Optical film brightness Design and Development Department of Company Q, a film manufacturer
Development of light-diffusing film for high-brightness displays
Spherical melamine/benzoguanamine particles improve diffusion
Company Q manufactures various films for displays. A client requested the development of a high-brightness light-diffusing film for a new monitor, and the design and development department was working hard. However, with each prototype, new problems came to light, and the project was expected to be difficult.
Challenges
We tried mixing acrylic and silica particles as light diffusing particles, but it didn't work at all...
High-brightness displays needed to consume less power than current displays while still providing sufficient brightness and a high-quality appearance, which is why Q Company's light diffusion film was positioned as an important component.
Mr. K from the Design and Development Department looks back on the situation at that time as follows:
"Initially, we were considering blending acrylic or silica particles as light-diffusing particles with the acrylic binders on conventional film substrates such as PET and PC."
Mr. K and his team immediately tried many times to change the film design, such as changing the film base material and particle design and the particle blending ratio. However, no matter what they tried, they were unable to increase the brightness. To improve brightness, it is necessary to increase the refractive index difference between the film base material and the light diffusion particles and increase the light diffusion. However, there are limits to the control that can be achieved using the particles that have been used up until now. They also considered making the film thinner to improve brightness, but this would create new issues, such as a decrease in the haze and a decrease in the light source hiding ability.
"Furthermore, when we tried using inorganic particles such as silica particles, the films were easily scratched when they rubbed against each other, so we gave up on using them." (Mr. K)
Mr. K was at a complete loss, so he looked into his business partners and past cases, but he was unable to find any information that might solve the problem, and the deadline was fast approaching.
Key Challenges
Although we tried mixing acrylic and silica particles as light-diffusing particles, we were unable to increase the brightness.
We considered making the film thinner to improve brightness, but this resulted in a decrease in haze and reduced light source hiding power.
We tried using inorganic particles, but gave up on using them because they made the films more susceptible to scratches when rubbed against each other.