Optical control switch device having a plurality of light receptors

• US 5,347,123 A
• Filed: 05/06/1993
• Issued: 09/13/1994
• Est. Priority Date: 05/06/1993
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Reiff, David E., Jackson, Gregory D., Branan, Mac W.
• Primary Examiner(s): Nelms, David C.
• Assistant Examiner(s): LE, QUE TAN
• Application Number:
  US08/057,377
• Time in Patent Office: 495 Days
• Field of Search: 250/229, 250/221, 250/231.13, 250/214 PR, 250/227.22, 340/539, 340/546, 340/555, 340/556, 340/870.08
• US Class Current: 250/229
• CPC Class Codes: H03K 17/941 using an optical detector H03K17/968 takes precedence
• CPC Class Codes: H03K 17/968 using opto-electronic devices

Abstract

An optical rotary control device (10) is provided comprising a light source (12) and at least one light receptor (14) linearly spaced, creating a planar axis with the light source (12). A rotatable light director (16) is provided which includes means for directing light from the light source (12) to at least one optical aperture (22) in the light director (16). The optical aperture (22) refracts the directed light from the light director (16) to the light receptor (14). The optical rotary control (10) device further comprises an isolator portion (20) having recesses (24) for receiving and separating the light source (12) and light receptor (14). The means for directing light may include a cut out section (18) in one end of the light director (16 ).

Claims

1. An optical control device comprising:

a light source;

a plurality of light receptors coplanarly disposed with said light source;

a light director having a plurality of optical apertures arranged to selectively direct light to the plurality of light receptors, the light director having integrally formed means for directing light from said light source to the plurality of optical apertures in said light director.

2. The optical control device of claim 1 further comprising an isolator portion having apertures for receiving and separating said light source and light receptor.

3. The optical control device of claim 1 wherein said light source and said light receptor are mounted on a molded assembly piece, said molded assembly piece including an integral means for receiving said light director.

4. The optical rotary control device of claim 1, wherein the reflective surface is formed from a cut out section within the light director.

5. The optical control device of claim 1 wherein the light source and light receptor are mounted to an isolator potion that is selectively metallized and attachable to a circuit assembly.

6. An optical rotary control device comprising:

a light source;

at least one light receptor coplanarly disposed with said light source;

a light director having means for directing light from said light source to at least one optical aperture in said light director wherein the means for directing light includes a cut out section in one end of the light director;

said optical aperture for refracting said directed light from the light director to said light receptor.

7. An optical control device comprising:

a light source mounted on a circuit assembly;

a plurality of light receptors coplanarly disposed on said circuit assembly from said light source;

a light director having a plurality of optical apertures arranged to selectively direct light to the plurality of light receptors, the light director having integrally formed means for directing light from said light source to the plurality of optical apertures in said light director.

8. The optical control device of claim 7 wherein said light source comprises a strobed light emitting diode.

9. The optical control device of claim 7 further comprising an opaque isolator portion having apertures that are linearly spaced and for mounting said light source and each light receptor on said circuit assembly within said apertures.

10. An optical control device comprising:

a light source mounted on a circuit assembly;

four light receptors linearly disposed on said circuit assembly forming a planar axis with said light source;

light director composed of a material that internally reflects light, said light director having a longitudinal axis and mounted on said circuit assembly so that said longitudinal axis is parallel to said planar axis formed by said light source and said light receptors, said light director having a cut out section in one end of said light director for reflecting light and directing said light internally within the light director;

at least one optical aperture for each light receptor for refracting said directed light from said light director to said light receptors.

11. The optical control device of claim 10 wherein an arrangement and number of apertures in said light director form a gray code.

12. The optical control device of claim 10 further comprising a plurality of optical apertures and a means for rotating that said light director so that sixteen different states may be detected from outputs of the light receptors.

13. The optical control device of claim 10 further comprising an isolator portion which separates each photo receptor and light source.

14. The optical control device of claim 10 wherein said light source is strobed.

15. The optical control device of claim 10 wherein said light director comprises a light pipe.

16. An optical rotary control device, comprising:

a light director being rotable along a rotation axis extending therethrough, the light director having plurality of optical apertures radially disposed from the rotation axis;

the light director having means for redirecting light originating from a light source radially disposed from the rotation axis of the light director to internally reflect within the light director;

the optical apertures being arranged to selectively direct the light from within the light director to a plurality of light receptors radially disposed from the rotation axis of the light director, when the light director is rotated.

17. The optical rotary control device of claim 16, wherein the light source and the plurality of light receptors are substantially coplanar.

18. The optical rotary control device of claim 16, wherein the means for redirecting light comprises a reflective surface formed within the light director.

19. The optical rotary control device of claim 18, wherein the reflective surface is formed to continuously redirect light from the light source as the light director is being rotated.

20. An optical rotary control device comprising:

a light source mounted on a circuit assembly;

at least one light receptor coplanarly disposed on said circuit assembly from said light source;

a light director having means for directing light from said light source to at least one optical aperture in said light director wherein the means for directing light comprises a cut out section in one end of the light director

said optical aperture for refracting said directed light from the light director to said light receptor.