초록

Among other things, light that carries information about cooking is directed in a first direction towards a redirection element and, at the redirection element, the light is redirected to be visible to a person cooking.

대표청구항 ▼

What is claimed is: 1. A method comprising: directing light that carries information about cooking in a first direction through a material of which a cooktop having a top surface and a bottom surface is formed towards a redirection element of the cooktop; at the redirection element, redirecting the

What is claimed is: 1. A method comprising: directing light that carries information about cooking in a first direction through a material of which a cooktop having a top surface and a bottom surface is formed towards a redirection element of the cooktop; at the redirection element, redirecting the light so that the light is visible above the cooktop; and wherein the light reflects off the top surface of the cooktop and off the bottom surface of the cooktop to reach the redirection element. 2. The method of claim 1 wherein the information is represented by a color of the light. 3. The method of claim 1 wherein the information is represented by a pattern, an image, a character, or a symbol. 4. The method of claim 1 wherein the information is modulated by turning the light on and off. 5. The method of claim 1 wherein the material transmits some portion of, or the entire visible spectrum. 6. The method of claim 1 wherein the redirection element comprises a light dispersing element. 7. The method of claim 6 wherein the light dispersing element comprises laser marked features. 8. The method of claim 6 wherein the light dispersing element comprises grit blasted features. 9. The method of claim 1 wherein the first direction comprises a controlled incoming angle at which the light enters the cooktop. 10. The method of claim 1 wherein the information comprises an on-and-off status. 11. The method of claim 1 wherein the information comprises temperature. 12. The method of claim 1 wherein the information comprises a temperature distribution. 13. The method of claim 1 wherein the information comprises a rate of temperature change. 14. The method of claim 1 also comprising delivering the light from a light emitting diode (LED). 15. The method of claim 1 also comprising delivering the light from a plasma lamp. 16. The method of claim 1 wherein the light is viewed as emitting from the vicinity of a heating element. 17. The method of claim 1 wherein the redirection element is in the vicinity of a heating element. 18. The method of claim 17 wherein the vicinity is directly over the heating element. 19. The method of claim 1 wherein the information is represented by light intensity. 20. The method of claim 1 wherein the information comprises a desired temperature. 21. The method of claim 1 wherein the information comprises a presence of food. 22. The method of claim 1 wherein cooktop edges are coated with a Lambertian light reflector. 23. The method of claim 1 wherein at least part of the cooktop bottom surface is coated with an optically absorptive coating. 24. The method of claim 1 wherein the redirection element is located within and/or on the top or bottom surface of the cooktop. 25. The method of claim 1 wherein the information is displayed by one or more internal redirection elements and/or one or more surface redirection elements. 26. The method of claim 16 wherein the heating element comprises an induction coil. 27. The method of claim 17 wherein the heating element comprises an induction coil. 28. The method of claim 18 wherein the heating element comprises an induction coil. 29. A cooktop having a top surface and a bottom surface comprising: a material which transmits an entire visible light spectrum or a portion thereof; a light redirecting element in the material which redirects light to be visible above the cooktop; wherein the light redirecting element receives light from a light source located outside the cooktop, the light is directed into an edge of the cooktop, and the light reflects off of the top surface of the cooktop and off of the bottom surface of the cooktop to reach the light redirecting element. 30. The cooktop of claim 29 wherein edges of the cooktop are coated with a Lambertian light reflector. 31. The cooktop of claim 29 wherein at least part of the bottom surface of the cooktop is coated with an optically absorptive coating. 32. An apparatus comprising: a cooktop having a top surface and a bottom surface; a plasma lamp to provide light visible at the top surface above the cooktop; a material from which the cooktop is formed which transmits the light visible at the top surface; a light redirecting element in the material which redirects light to be visible above the cooktop; and wherein the light reflects off of the top surface of the cooktop and off of the bottom surface of the cooktop to reach the light redirecting element. 33. The apparatus of claim 32 further comprising an induction heating element. 34. The apparatus of claim 33 wherein the plasma lamp is over the induction heating element. 35. The apparatus of claim 34 wherein the plasma lamp comprises a grounded electrode. 36. The apparatus of claim 32 wherein the plasma lamp comprises a multiplicity of concentric annuli of light emitting zones. 37. The apparatus of claim 36 wherein the light emitting zones of the plasma lamp being illuminated depends on an induction heated cookware's size. 38. The apparatus of claim 32 wherein the light is modulated to display the information. 39. The apparatus of claim 38 wherein light modulation is a variation in color. 40. The apparatus of claim 34 wherein the plasma lamp comprises a multiplicity of phosphor layers with different emitted colors. 41. An method comprising: determining information about a changing state of cooking being done on a cooktop having a top surface and a bottom surface; reflecting light that has a characteristic that changes based on the changing state of the cooking, the light being reflected off of the top surface of the cooktop and off of the bottom surface of the cooktop; and making the light visible above the cooktop.