Electronic display with lens matrix

• US 5,043,716 A
• Filed: 07/14/1988
• Issued: 08/27/1991
• Est. Priority Date: 07/14/1988
• Status: Expired due to Term

• Current Assignee: Adaptive Micro Systems LLC
• Original Assignee: Adaptive Micro Systems LLC
• Inventors: Mandler, Thomas J., Latz, William J., Lai, Jason C. S.
• Primary Examiner(s): BRIER, JEFFERY A
• Application Number:
  US07/219,022
• Time in Patent Office: 1,139 Days
• Field of Search: 340/762, 340/782, 340/815.03, 313/500, 313/512, 313/499, 313/498, 313/510, 40/547, 40/452, 40/550, 40/546, 362/32, 362/800
• US Class Current: 345/82
• CPC Class Codes: G02B 3/0012 characterised by the manufacturing method
• CPC Class Codes: G02B 3/0056 arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses G02B3/0043 takes precedence; miniaturised objectives for electronic devices employing wafer level optics G02B13/0085
• CPC Class Codes: G09F 9/33 being semiconductor devices, e.g. diodes
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 2933/0091 Scattering means in or on the semiconductor body or semiconductor body package H01L33/22 takes precedence
• CPC Class Codes: H01L 33/58 Optical field-shaping elements

Abstract

An electronic display includes a matrix of LEDs mounted to a circuit board and selectively operated to produce a message or image. A reflector matrix mounts to the circuit board and provides light pipes which extend forward from each LED to direct its light and provide protection. Potting compound is disposed in each light pipe and extends beyond the reflector matrix to provide a convex lens. In one embodiment the potting compound extends into a convex lens cover.

Claims

1. An electronic display which comprises:

a printed circuit board having a plurality of light emitting devices mounted to its front surface and arranged in a pattern;

a reflector matrix disposed over the front surface of the printed circuit board and having a plurality of openings formed therethrough which are aligned with the light emitting devices in said pattern to provide a light pipe which extends forward from each light emitting device;

a lens cover disposed over the front surface of the reflector matrix and having a plurality of lenses which are aligned with the light pipes in said pattern to provide a convex lens portion over the forward end of each light pipe, said convex lens portion having a concave back portion; and

a petting compound disposed in each light pipe, the potting compound filling each light pipe and extending beyond the reflector matrix to fill the concave back portion of the lens cover, the potting compound being the sole material occupying the light pipe except for any material covering said light emitting devices.

2. The electronic display as recited in claim 1 in which the light emitting devices are light emitting diodes.

3. The electronic display as recited in claim 1 in which the potting compound is an epoxy compound.

4. The electronic display as recited in claim 3 in which the potting compound contains a light diffusing material.

5. The electronic display as recited in claim 2 in which a transparent protective material is disposed dover each light emitting diode.

6. The electronic display as received in claim 5 in which the protective material is a urethane.

7. The electronic display as recited in claim 1 in which the potting compound and the lens cover have substantially the same index of refraction.

8. The electronic display as recited in claim 5 wherein said light emitting diode is covered with a solidified material having a convex configuration and having substantially the same index of refraction as said potting compound and said lens cover.

9. An electronic display which comprises:

a printed circuit board having a plurality of light emitting devices mounted to its front surface and arranged in a pattern;

a reflector matrix disposed over the front surface of the printed circuit board and having a plurality of openings formed therethrough which are aligned with the light emitting devices in said pattern to provide a light pipe which extends forward from each light emitting device; and

a lens material disposed over the front surface of the reflector matrix, said lens material composed of a potting compound disposed in each light pipe, the potting compound filling each light pipe and extending beyond the reflector matrix to provide a convex lens portion extending from said reflector matrix, the potting compound being the sole material occupying the light pipe except for any material covering said light emitting devices.

10. The electronic display as recited in claim 9 wherein aid potting compound is an epoxy compound.

11. The electronic display as recited in claim 9 wherein said light emitting devices are covered with a solidified lateral having a convex configuration.

12. The electronic display as recited in claim 10 wherein said epoxy compound contains a diffusant material.