Electronically switchable optical device with a multi-functional optical control apparatus and methods for operating the same

• US 9,411,174 B2
• Filed: 04/05/2011
• Issued: 08/09/2016
• Est. Priority Date: 04/05/2010
• Status: Active Grant

• Current Assignee: Alphamicron Incorporated
• Original Assignee: Alphamicron Incorporated
• Inventors: Burt, Damien P., Taheri, Bahman, Kosa, Tamas, Prechel, Michael C.
• Primary Examiner(s): Bui Pho, Pascal M
• Assistant Examiner(s): Oestreich, Mitchell
• Application Number:
  US13/639,523
• Publication Number:
  US 20130048836A1
• Time in Patent Office: 1,953 Days
• Field of Search: 250/214.AL, 250/221, 250/216, 250/226, 250/214.SW, 250/214.R
• US Class Current: 1/1
• CPC Class Codes: G02C 7/101 having an electro-optical light valve electro-optical elements per se G02F

Abstract

An electronically controllable optical device is provided which includes a cell maintaining an electro-optically controllable material, a photosensor associated with the cell, wherein the photosensor generates an input signal based on ambient light level, and a control circuit which receives the input signal and generates at least one output signal received by the cell. The device also includes a single switch connected to the control circuit, wherein actuation of the switch in predetermined sequences enables at least two of the following features of the device, a state change of the material, a system change between auto and manual modes, or a threshold value change for generation of the ambient light input signal, a device color change, a device tint change or a reset of the threshold value to the original factory setting. Methods of operation for the device are also provided. A control apparatus for the device is also disclosed.

Claims

1. An electronically controllable eyewear device, comprising:

a cell comprising at least one liquid crystal material capable of changing from a first state of higher light transmittance when no voltage is applied to a second state of a lower light transmittance upon application of a voltage and vice versa;

a photosensor associated with the cell, said photosensor generating an input signal based on ambient light level to operate said device in an auto mode;

a single switch capable of being actuated in a series of predetermined sequences to generate a switch signal; and

a control circuit capable of receiving said input signal said switch signal and being capable of generating a separate output signal to operate said cell

wherein in said auto mode detection of an ambient light level above a predetermined threshold value results in said voltage being applied, and wherein detection of an ambient light level below said predetermined threshold value results in no voltage being applied;

wherein actuation of said single switch in a first predetermined sequence enables (i) a state change of the liquid crystal material between said first and second states;

wherein actuation of said single switch in a second predetermined sequence enables (ii) a system change from a manual mode to said auto mode; and

wherein actuation of said single switch in a third predetermined sequence enables (iii) a change in said predetermined threshold value.

2. The device according to claim 1, wherein actuation of said single switch in said series of predetermined sequences is by using either a press and release or a press and hold for various periods of time.

3. The device according to claim 1, wherein actuation of said single switch in a fourth predetermined sequence enables (iv) a reset of said changed threshold value back to said predetermined threshold value.

4. The device according to claim 1, wherein actuation of said single switch in said first predetermined sequence when in the auto mode causes a system change from the auto mode back to the manual mode.

5. The device according to claim 1, wherein said cell comprises at least two stacked sub-cells, each sub-cell having a clear state and a color state, and

wherein actuation of said single switch or a second switch in another predetermined sequence enables a device color change by changing a state of each said sub-cell from its said clear state to its said color state.

6. The device according to claim 5, wherein said device color change comprises changing said device color between at least a first color, a second color and a third color.

7. The device according to claim 1, wherein said cell comprises one cell and wherein actuation of said single switch or a second switch enables device tint change by changing the voltage supplied to said one cell so as to change a darkness level of said one cell.

8. The device according to claim 5, wherein actuation of said single or said second switch enables a device tint change by changing the voltage supplied to at least one of said sub-cells so as to change a darkness level of said sub-cell when said sub-cell is in a color state.

9. The device according to claim 1, wherein said single switch is movable from an open condition to a closed condition, said single switch biased to return to said open condition.

16. The device according to claim 1, wherein said first second and third predetermined sequences are selected from one of:

pressing and releasing said single switch in a first predetermined period of time;

pressing and releasing said single switch twice within a second predetermined period of time; and

pressing and holding said single switch for a third period of time.

17. The device according to claim 3, wherein said fourth predetermined sequence comprises pressing and holding said single switch for a fourth period of time.

21. The eyewear device according to claim 1, wherein said single switch is located on a frame or temple of said eyewear device.

22. The device according to claim 1, wherein the liquid crystal material can have an intermediate state of light transmission between said first and second states depending on application of a variable voltage.

23. The device according to claim 22, wherein the intermediate state of light transmission is associated with the amount of ambient light detected by said photosensor.

10. A method of controlling an electronically switchable eyewear device, comprising:

providing a cell with an electro-optically active liquid crystal material, a photosensor associated with said cell that can generate an input signal based on a threshold ambient light level for operating the cell in an auto mode, a single switch capable of being actuated in a series of predetermined sequences to generate a switch signal, and a control circuit that receives said input signal and said switch signal and is capable of generating a separate output signal to operate said cell; and

actuating said single switch in a series of predetermined sequences to enable three or more functions selected from;

(i) a state change of said electro-optically active liquid crystal material from a clear state when no voltage is applied to a dark or colored state upon application of a voltage and vice versa;

(ii) a system change from a manual mode to an auto mode;

(iii) a change in said threshold ambient light level for generation of said input signal when in the auto mode;

or

(iv) a reset of said threshold ambient light level for the generation of said input signal to a factory setting

wherein each function is enabled by one of said series of predetermined sequences, and

wherein during said auto mode, said control circuit applies said voltage when said threshold ambient light level is above a predetermined threshold value and applies no voltage when said threshold ambient light level is below said predetermined threshold value.

11. The method according to claim 10, wherein said series of predetermined sequences comprise:

pressing and releasing said single switch in a first predetermined period of time to obtain a first function;

pressing and releasing said single switch twice within a second predetermined period of time to obtain a second function; and

pressing and holding said single switch for a third period of time to obtain a third function,

wherein each said first, second and third functions are selected from functions (i) to (iv).

12. The method according to claim 11, further comprising:

pressing and releasing said single switch and then pressing and holding said switch for a fourth period of time to obtain a fourth function selected from any one of functions (ii) to (iv).

13. The method according to claim 10, further comprising:

providing said cell with at least two stacked sub-cells, each sub-cell having a clear state and a color state, and

actuating said single switch or a second switch in another predetermined sequence to change each said sub-cell between its said clear state and its said color state to obtain a device color change.

14. The method according to claim 13, wherein said device color change comprises changing said device color between at least a first color, a second color and a third color.

18. The method according to claim 10, further comprising:

actuating said single switch or a second switch in a predetermined sequence to enable a device tint change by changing a voltage supplied to said cell so as to change a darkness level of said cell.

19. The method according to claim 10, wherein said single switch is movable from an open condition to a closed condition, said single switch biased to return to said open condition.

20. The method according to claim 13, further comprising:

actuating said single or second switch to enable a device tint change by changing a voltage supplied to at least one of said sub-cells so as to change a darkness level of said sub-cell when said sub-cell is in a color state.

15. A multi-functional apparatus for controlling an electronically switchable eyewear device comprising:

a cell comprising at least one liquid crystal-dye mixture

a photosensor that generates an ambient light input signal for operation in an auto mode;

a single switch that generates a switch signal, wherein said single switch is actuable in a series of predetermined sequences;

a control circuit configured for use with said cell and capable of changing said liquid crystal-dye mixture between a high light transmittance clear state when no voltage is applied and a low light transmittance tinted state upon application of a voltage and vice versa, said control circuit adapted to receive said ambient light input signal and said switch signal and capable of generating a separate output signal to apply said voltage to said liquid crystal cell;

wherein actuation of said single switch in a first predetermined sequence enables a state change of said liquid crystal cell from said clear state to said tinted state or vice versa, and

wherein each said series of predetermined sequences enable a function selected from two or more of the following features of the optical device;

a system change from a manual mode to an auto mode wherein during said auto mode, the control circuit applies said voltage to change the liquid crystal-dye mixture to said tinted state or applies zero voltage to return said liquid crystal-dye mixture to said clear state in response to said ambient light input signal;

setting a threshold for generation of said output signal in response to said ambient light input signal;

a reset of said threshold setting to a factory setting;

or

a color change.