1. A method of activating a proximity switch assembly comprising:
generating activation fields with a plurality of proximity sensors associated with a plurality of proximity switches;
monitoring amplitude of a signal generated in response to each of the activation fields;
subtracting the smallest signal from each of the other signals; and
determining activation of one of the plurality of proximity switches based on the subtracted signals.
2. The method of claim 1, wherein the plurality of proximity sensors comprises at least three proximity sensors associated with at least three respective proximity switches.
3. The method of claim 1, wherein the plurality of proximity sensors are associated with a first group of proximity switches, and wherein the proximity switch assembly comprises a second group of proximity switches, wherein the smallest signal from each of the other signals of the first group of proximity switches are subtracted from other signals of the first group of proximity switches.
4. The method of claim 1, wherein the step of determining activation of one of the plurality of proximity switches based on the subtracted signals comprises determining activation of the proximity switch having the largest signal based on one or more threshold values.
5. The method of claim 1, wherein at least one of the plurality of proximity sensors are weighted based on a proximity switch interface pad configuration.
6. The method of claim 1, wherein the proximity switch assembly is installed on a vehicle for use by a passenger in the vehicle.
7. The method of claim 1, wherein the proximity switch comprises a capacitive switch comprising one or more capacitive sensors.
8. A proximity switch assembly comprising:
a plurality of proximity switches each comprising a proximity sensor for providing a sense activation field; and
control circuitry processing the activation field of each proximity switch to sense activation, said control circuitry monitoring amplitude of a signal generated in response to each of the activation fields, subtracting the smallest signal from each of the other signals, and determining activation of one of the plurality of proximity switches based on the subtracted signals.
9. The proximity switch assembly of claim 8, wherein the plurality of proximity switches comprises at least three proximity switches each having at least one proximity sensor.
10. The proximity switch assembly of claim 8, wherein the plurality of proximity switches includes a first group of proximity switches and a second group of proximity switches, wherein the smallest signal from each of the other signals of the first group of proximity switches are subtracted from the other signals of the first group of proximity switches.
11. The proximity switch assembly of claim 8, wherein the control circuitry further determines the largest signal and determines activation of one of the plurality of proximity switches based on the smallest signal subtracted from the largest signal.
12. The proximity switch assembly of claim 8, wherein at least one of the plurality of proximity sensors are weighted based on a proximity switch interface pad configuration.
13. The proximity switch assembly of claim 8, wherein the proximity switch assembly is installed on a vehicle for use by a passenger in the vehicle.
14. The proximity switch assembly of claim 8, wherein the proximity switch comprises a capacitive switch comprising one or more capacitive sensors.
15. A method of suppressing noise for a plurality of proximity sensors, comprising:
generating activation fields with the plurality of proximity sensors;
monitoring amplitude of a signal generated in response to each of the activation fields;
subtracting the smallest signal from each of the other signals; and
determining activation of one of the plurality of proximity sensors based on the subtracted signal.
16. The method of claim 15, wherein the plurality of proximity sensors are associated with a first group and a second group, wherein the smallest signal from each of the other signals of the first group of proximity sensors are subtracted from other signals of the first group of proximity sensors, and wherein the smallest signal from each of the other signals of the second group of proximity sensors are subtracted from other signals of the second group of proximity sensors.
17. The method of claim 15, wherein the proximity sensors are installed on a vehicle for use by a passenger in a vehicle.
18. A proximity sensor assembly comprising:
a plurality of proximity sensors each providing a sensed activation field;
control circuitry for processing the activation field of each proximity sensor to sense activation, said control circuitry monitoring amplitude of a signal generated in response to each of the activation fields, subtracting the smallest signal from each of the other signals, and determining activation of one of the plurality of proximity sensors based on the subtracted signals.
19. The proximity sensor assembly of claim 18, wherein the plurality of proximity sensors are associated with a first group and a second group, wherein the smallest signal from each of the other signals of the first group of proximity sensors are subtracted from other signals of the first group of proximity sensors, and wherein the smallest signal from each of the other signals of the second group of proximity sensors are subtracted from other signals of the second group of proximity sensors.
20. The proximity sensor assembly of claim 18, wherein the proximity sensors are installed on a vehicle for use by a passenger in a vehicle.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A gradient optical film comprising:
a binder;
a plurality of elongated particles; and
a plurality of interconnected voids, wherein a local volume fraction of the plurality of interconnected voids varies along a thickness direction of the gradient optical film, and wherein
a first local volume fraction of the plurality of interconnected voids proximate a first surface of the gradient optical film is greater than a second local volume fraction of the plurality of interconnected voids proximate an opposing surface of the gradient optical film, and wherein the gradient optical film consists of a single layer with a thickness of not less than 2 microns.
2. The gradient optical film of claim 1, wherein the local volume fraction of the plurality of interconnected voids comprises a minimum local volume fraction or a maximum local volume fraction, along the thickness of the gradient optical film.
3. The gradient optical film of claim 1, wherein the second volume fraction of the plurality of interconnected voids is less than 50% of the first volume fraction of the plurality of interconnected voids.
4. The gradient optical film of claim 1, wherein the second volume fraction of the plurality of interconnected voids is less than 20% of the first volume fraction of the plurality of interconnected voids.
5. The gradient optical film of claim 1, wherein the gradient optical film has a bulk volume fraction of the plurality of interconnected voids that is not less than about 20%, a thickness of the gradient optical film is not less than about 2.5 micron, and an optical haze of the gradient optical film is not greater than about 10%.
6. An optical construction comprising:
an optical diffuser layer having an optical haze that is not less than about 30%; the gradient optical film of claim 1 disposed on the optical diffuser layer; and a reflective polarizer layer disposed on the gradient optical film, wherein
substantial portions of each two neighboring major surfaces in the optical construction are in physical contact with each other.
7. The optical construction of claim 6, wherein the gradient optical film is laminated to at least one of the reflective polarizer layer and the optical diffuser layer via an optical adhesive layer.
8. The optical construction of claim 6, wherein the gradient optical film is coated on at least one of the reflective polarizer layer and the optical diffuser layer.
9. A gradient optical film, comprising:
a plurality of elongated particles; and
a plurality of interconnected voids, wherein a local volume fraction of the plurality of interconnected voids varies along a thickness direction of the gradient optical film, and wherein
the gradient optical film has a first index of refraction proximate a first surface of the gradient optical film that is lower than a second index of refraction proximate an opposing surface of the gradient optical film, wherein the first index of refraction is not greater than about 1.3, and wherein the gradient optical film consists of a single layer with a thickness of not less than 2 microns.
10. The gradient optical film of claim 9, wherein the local volume fraction of the plurality of interconnected voids comprises a minimum local volume fraction or a maximum local volume fraction, along the thickness of the gradient optical film.
11. The gradient optical film of claim 9, wherein the second volume fraction of the plurality of interconnected voids is less than 50% of the first volume fraction of the plurality of interconnected voids.
12. The gradient optical film of claim 9, wherein the second volume fraction of the plurality of interconnected voids is less than 20% of the first volume fraction of the plurality of interconnected voids.
13. The gradient optical film of claim 9, wherein the second volume fraction of the plurality of interconnected voids is less than 10% of the first volume fraction of the plurality of interconnected voids.
14. An optical construction, comprising:
a structured surface comprising a plurality of structures; and
a gradient optical film coated on and substantially planarizing the structured surface, the gradient optical film comprising:
a plurality of interconnected voids, wherein a local volume fraction of the plurality of interconnected voids varies along a thickness direction of the gradient optical film, and wherein
a first local volume fraction of the plurality of interconnected voids proximate the plurality of structures is greater than a second local volume fraction of the plurality of interconnected voids proximate an opposing surface of the gradient optical film, and wherein the gradient optical film consists of a single layer with a thickness of not less than 2 microns.
15. The optical construction of claim 14, wherein the gradient optical film further comprises an index proximate the plurality of structures that is not greater than about 1.3.
16. The optical construction of claim 14, wherein the gradient optical film further comprises an optical haze that is not greater than about 10%.