Variable transmittance optical filter with substantially co-planar electrode system
a transmittance optical filter and substantially co-planar electrode technology, applied in the direction of static indicating devices, door/window protective devices, instruments, etc., can solve the problems of difficult manipulation for users, drawing blinds, and windows made using electrochromic technology can be quite expensiv
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
Problems solved by technology
Method used
Image
Examples
example 1
Preparation of Selected Hybrid P / E Compounds
[0203]S001 and S002 were prepared as described in U.S. Pat. No. 7,777,055.
Synthesis of S042—
[0204]
Synthesis of 3-bromo-2,5-bis(4-(tert-butyl)phenyl)thiophene: (30)
[0205]Sodium carbonate monohydrate (58.0 g, 468 mmol) was dissolved in water (500 mL) and a solution of 4-(tert-butyl)-phenylboronic acid (40.0 g) and 2,3,5-tribromothiophene (30.0 g, 94 mmol) in THF (500 mL) was added, and deoxygenated by bubbling with argon. Pd(PPh3)4 (5.0 g, 4.30 mmol) was added and the mixture refluxed for 24 h. The mixture was cooled and the aqueous phase separated and extracted with EtOAc. Organic fractions were combined washed with water (500 mL) and dried over MgSO4. The solvent was evaporated and the crude product washed in MeOH, filtered and dried overnight to afford a light yellow, powdery solid (35.46 g, 89%).
Synthesis of S042
[0206](3,3′-(perfluorocyclopent-1-ene-1,2-diyl)bis(2,5-bis(4-(tert-butyl)phenyl)thiophene.): A solution of (30) in anhydrous TH...
example 2
Preparation and Testing of Variable Transmittance Optical Filters with an Interdigitated SC Electrode System Comprising Symmetric Electrode Widths
[0213]Six variable transmittance optical filters comprising different interdigitated SC electrode systems were prepared as follows. A test wafer was formed from a piece of ITO-coated glass purchased from Delta Technologies (Stillwater, Minn.). Areas with symmetric interdigitated electrodes were created in which both first and second electrodes and bus bars were of equal size, with spacing and electrode digit width as indicated in Table 1. A photoresist layout of the electrode patterns was created with CAD, a suitable photomask produced and the pattern wet-etched into the ITO coating using standard photolithographic techniques. Briefly, the substrate was cleaned with acetone and isopropyl alcohol, and AZ™ MIR™ 703 resist spincoated at 4000 rpm and baked at 90° C. for 60 seconds (following manufacturer's instructions). The electrode patterns...
example 3
Preparation and Testing of Variable Transmittance Optical Filters with an SC Electrode System Comprising Asymmetric Electrode Widths
[0216]This example describes the preparation and testing of variable transmittance optical filters in which the SC electrode system of the variable transmittance optical system is patterned asymmetrically. A first electrode comprises fingers that are wider than those of the second electrode, providing a greater square area for the first electrode relative to the second electrode. In devices comprising a hybrid P / E switching material where the larger electrode is the anode (positive potential) and the smaller electrode is the cathode (negative potential), all, or substantially all, of the area of the device can be electrofaded. This example demonstrates that an asymmetric interdigitated electrode pattern can provide better uniformity while electrofading the switching material, with a smaller electrode area, and in some applications, a reduced need for et...
PUM
| Property | Measurement | Unit |
|---|---|---|
| wavelengths | aaaaa | aaaaa |
| wavelengths | aaaaa | aaaaa |
| wavelengths | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More