Clocks with diffusion reflector lighting

• US 20030174586A1
• Filed: 11/26/2002
• Published: 09/18/2003
• Est. Priority Date: 11/30/2001
• Status: Abandoned Application

• Current Assignee: Equity Industries, Inc.
• Original Assignee: Equity Industries, Inc.
• Inventors: Hon, Patrick Fong Wing, Kin, So Si, Chung, Charles Wong Tak, Kibiloski, Keith E.
• Application Number:
  US10/304,329
• Publication Number:
  US 20030174586A1
• Time in Patent Office: Days
• US Class Current: 368/84
• CPC Class Codes: G02B 6/0021 for housing at least a part of the light source, e.g. by forming holes or recesses
• CPC Class Codes: G02B 6/0046 Tapered light guide, e.g. wedge-shaped light guide
• CPC Class Codes: G02B 6/0051 Diffusing sheet or layer
• CPC Class Codes: G02B 6/0068 Arrangements of plural sources, e.g. multi-colour light sources
• CPC Class Codes: G02B 6/0073 Light emitting diode [LED]
• CPC Class Codes: G02F 1/133621 providing coloured light G02F1/133617, G02F1/133533 take precedence
• CPC Class Codes: G04G 9/0041 Illumination devices

Abstract

A clock with a display of the liquid crystal display (LCD) type provides indicia such as time, day, month, year and temperature, and also provides sufficient back lighting to operate as a night light. The clock has a reflector module disposed behind the LCD display with a generally clear module element that may have an engraved back surface for improved light dispersion from one or more light sources, such as light emitting diodes (LEDs). The module element has edges with reflective properties, a light reflective material disposed behind said module element and one or more light sources disposed along an edge thereof. The edge of the module element preferably has a notch or recess for positioning the light source therein. The invention also includes reflector modules for clocks.

Claims

1. A reflector module for back lighting of a liquid crystal display of a clock, said liquid crystal display having a defined area, said reflector module comprising:

a generally clear module element having edge surfaces and sized to be disposed in back of said liquid crystal display;

said edge surfaces having light reflective properties to substantially reflect light about the interior of said clear module element;

a portion of said clear module element extending beyond the defined area of said liquid crystal display; and

a light source disposed at a point along an edge of said portion of the generally clear module element that extends beyond the defined area of said liquid crystal display to provide light into said reflector module.

2. The reflector module as claimed in accordance with claim 1 wherein the light source comprises one or more light emitting diodes.

3. The reflector module as claimed in accordance with claim 1 wherein said portion of the generally clear module element extending beyond the defined area of said liquid crystal display has sides with reflective properties.

4. The reflector module as claimed in accordance with claim 1 wherein the power for said light source is selected from the group consisting of conventional battery power, rechargeable battery power, solar cells or an alternating current power source.

5. The reflector module as claimed in accordance with claim 1 wherein a diffusion film is disposed between said liquid crystal display and said generally clear module element.

6. The reflector module as claimed in accordance with claim 1 wherein said generally clear module element is engraved on its rear surface.

7. The reflector module as claimed in accordance with claim 6 wherein the engraving on the rear surface of the generally clear module element comprises a dot matrix pattern.

8. The reflector module as claimed in accordance with claim 7 wherein said dot matrix pattern has a gradient of smaller dots to larger dots in one direction across said generally clear module element.

9. The reflector module as claimed in accordance with claim 1 wherein said point along the portion of the module element that extends beyond the area of the liquid crystal display comprises a recess or notch for receiving the light source.

10. The reflector module as claimed in accordance with

claim 9 wherein said notch or recess does not have said light reflecting properties such that a significant portion of the light transmitted by said light source is gathered by the module element.

11. The reflector module as claimed in accordance with claim 1 further comprising a light reflective material disposed behind said module element.

12. The reflector module as claimed in accordance with claim 1 wherein said light source is disposed along an edge of said module element.

13. The reflector module in accordance with claim 1 further comprising an additional module element for back lighting of an additional liquid crystal display.

14. The reflector module as claimed in accordance with claim 13 wherein said additional module element has a light source of a different color than the other light source.

15. The reflector module as claimed in accordance with claim 1 wherein said module element has a plurality of light sources disposed therealong with at least two of the light sources being of different colors.

16. A clock with a liquid crystal display for displaying multiple indicia, said liquid crystal display having a defined area, said clock comprising:

a reflector module for back lighting of the liquid crystal display of said clock;

said reflector module including a generally clear module element having edge surfaces and sized to be disposed in back of said liquid crystal display, said edge surfaces having light reflective properties to substantially reflect light about the interior of said clear module element, a portion of said clear module element extending beyond the defined area of said liquid crystal display; and

a light source disposed at a point along an edge of said portion of the generally clear module element that extends beyond the defined area of said liquid crystal display to provide light into said reflector module.

17. The clock with a liquid crystal display as claimed in accordance with claim 16 wherein the light source comprises one or more light emitting diodes.

18. The clock with a liquid crystal display as claimed in accordance with claim 16 wherein said portion of the generally clear module element extending beyond the defined area of said liquid crystal display has sides with reflective properties.

19. The clock with a liquid crystal display as claimed in accordance with claim 16 wherein the power for said light source is selected from the group consisting of conventional battery power, rechargeable battery power, solar cells or an alternating current power source.

20. The clock with a liquid crystal display as claimed in accordance with claim 16 wherein a diffusion film is disposed between said liquid crystal display and said generally clear module element.

21. The clock with a liquid crystal display as claimed in accordance with claim 16 wherein said generally clear module element is engraved on its rear surface.

22. The clock with a liquid crystal display as claimed in accordance with claim 21 wherein the engraving on the rear surface of the generally clear module element comprises a dot matrix pattern.

23. The clock with a liquid crystal display as claimed in accordance with claim 22 wherein said dot matrix pattern has a gradient of smaller dots to larger dots in one direction across said generally clear module element.

24. The clock with a liquid crystal display as claimed in accordance with claim 16 wherein said point along the portion of the module element that extends beyond the area of the liquid crystal display comprises a recess or notch for receiving the light source.

25. The clock with a liquid crystal display as claimed in accordance with

claim 24 wherein said notch or recess does not have said light reflecting properties such that a significant portion of the light transmitted by said light source is gathered by the module element.

26. The clock with a liquid crystal display as claimed in accordance with claim 16 further comprising a light reflective material disposed behind said module element.

27. The clock with a liquid crystal display as claimed in accordance with claim 16 wherein said light source is disposed along an edge of said module element.

28. The clock with a liquid crystal display as claimed in accordance with claim 16 further comprising an additional module element for back lighting of an additional liquid crystal display.

29. The clock with a liquid crystal display as claimed in accordance with claim 28 wherein said additional module element has a light source of a different color than the other light source.

30. The clock with a liquid crystal display as claimed in accordance with claim 16 wherein said module element has a plurality of light sources disposed therealong with at least two of the light sources being of different colors.

31. The clock with a liquid crystal display as claimed in claim 16 wherein said light source emits sufficient illumination through said liquid crystal display to provide night lighting.

32. The clock with a liquid crystal display as claimed in claim 16 wherein said light source may be programmed to provide a night light function.

33. The clock with a liquid crystal display as claimed in claim 16 wherein said liquid crystal display provides multiple indicia selected from the group consisting of time, day, month, year or temperature.