A method of applying a particle film to create a surface having light-diffusive and/or reduced glare properties
A technology of light diffusion and glare, applied in the direction of diffusion elements, optics, nano optics, etc.
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Embodiment 1
[0043] Embodiment 1: dispersion preparation
[0044] By mixing Slurry 1 (clear, containing 10 wt% of 10 nm TiO in 1-propanol and water 2 particles) and slurry 2 (dispersed, containing 5 wt% of 300nm TiO in 1-propanol and water 2 particles) to prepare 1-20wt% TiO 2 solution. For example, mix 4.75g of Slurry 1 and 0.25g of Slurry 2 to obtain 5wt% Slurry 2 TiO 2 solution. To ensure uniform mixing, the solution was stirred for 1 hour and placed in an ultrasonic bath for 2 hours. Then, it was further stirred for 1 hour.
[0045] Fabrication of TiO on Platinum-coated Substrates 2 Floor
[0046] This solution was knife coated onto platinum (Pt) coated glass substrates to produce thin uniform films. Then, the substrate was placed on an electric furnace at 450° C. for 30 minutes, thereby evaporating 1-propanol and water in the film. Of course, the substrate is not limited to Pt-coated glass substrates, the choice of coating & substrate depends on the application. The substrat...
Embodiment 2
[0049] Example 2: TiO coating 2 Reflectivity Measurement of Pt Substrates
[0050] Measurement of coated TiO using LCD evaluation system "Photal Otsuka Electronics LCD-700" 2 The reflectivity of the Pt substrate. Set the detector at 0° (surface normal) while moving the incident parallel white light from 15° to 70°. 100% normalization was performed using a diffuse whiteness standard (Labsphere SRS99-020).
[0051] result, figure 2 showed that, through TiO 2 The concentration of paste 2 changes the reflectance profile. Each value corresponds to TiO 2 wt % of slurry. In order to pass only TiO 2 In addition to methods other than controlling dispersion, the PDLC in the figure depicts polymer-dispersed liquid crystals formed on a common backplate (BP). However, such PDLC films are too thick for use as backplanes. It can be seen that compared with the ordinary base plate, the TiO-coated 2 The Pt substrate has a higher reflectivity above 30 degrees. This means that with c...
Embodiment 3
[0052] Embodiment 3: Manufacture TiO on TFT substrate 2 Floor
[0053] Will the same TiO 2 The solution was drawn down on the TFT substrate to make the substrate more diffuse. as can be obtained from Figure 3-5 As seen in , at elevated process temperatures TiO 2 The solution reacts with the TFT backplane. However, if TiO 2 At very low concentrations, the temperature can be raised without damage; in this example, there were no degradation reactions at concentrations below 1 wt%. In this case, however, it is desirable to evaporate 1-propanol and water in vacuo at room temperature. Figure 3-5 The TFT backplane shown has a polyimide alignment layer between the backplane and the TiO 2 The layers act as barriers. It is not necessary to have a polyimide layer, but it helps to inhibit degradation reactions, which can be dried in a vacuum oven at 80 degrees with 4wt% TiO 2 seen in solution.
[0054] Figure 5 showed that even at a viewing angle of 45 degrees, TiO dried in ...
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