Flexible light array and fabrication procedure thereof

• US 20050207156A1
• Filed: 03/22/2004
• Published: 09/22/2005
• Est. Priority Date: 03/22/2004
• Status: Abandoned Application

• Current Assignee: Harvatek Corporation
• Original Assignee: Harvatek Corporation
• Inventors: Wang, Bily, Chuang, Jonnie
• Application Number:
  US10/805,346
• Publication Number:
  US 20050207156A1
• Time in Patent Office: Days
• US Class Current: 362/240
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/90 Methods of manufacture
• CPC Class Codes: F21S 4/20 with light sources held by or within elongate supports
• CPC Class Codes: F21Y 2105/10 comprising a two-dimensional array of point-like light-generating elements
• CPC Class Codes: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: F21Y 2107/90 on two opposite sides of supports or substrates
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence

Abstract

A flexible light array is constructed to have a flexible substrate with conducting circuits therein, a LED array formed of longitudinally and transversely aligned light emitting diodes respectively electrically connected to the conducting circuits and controllable by a driving circuit to produce a video display, and a flexible plastic member packed on the flexible substrate and the LED array.

Claims

1. A flexible light array comprising:

a flexible substrate, said flexible substrate having a plurality of conducting circuits therein; and

a plurality of light emitting diodes arranged into at least one longitudinally and transversely aligned LED array on at least one of two opposite sides of said flexible substrate and respectively electrically connected to the conducting circuits of said flexible substrate and controllable by a driving circuit to emit light.

2. The flexible light array as claimed in claim 1, wherein said light emitting diodes are arranged into one longitudinally and transversely aligned LED array on one side of said flexible substrate, forming with said flexible substrate a flexible LED display panel.

3. The flexible light array as claimed in claim 2, wherein said flexible LED display panel is used as a signal light for a transportation vehicle.

4. The flexible light array as claimed in claim 2, wherein said flexible LED display panel is used as a lighting signboard.

5. The flexible light array as claimed in claim 2, wherein said flexible LED display panel is used as an outdoor TV wall.

6. The flexible light array as claimed in claim 1, wherein said light emitting diodes are arranged into two longitudinally and transversely aligned LED arrays symmetrically disposed on the two opposite sides of said flexible substrate, forming with said flexible substrate a double-sided LED display panel.

7. The flexible light array as claimed in claim 1, wherein said light emitting diodes are arranged into two longitudinally and transversely aligned LED arrays disposed on the two opposite sides of said flexible substrate in a staggered manner, forming with said flexible substrate a double-sided LED display panel.

8. The flexible light array as claimed in claim 1, further comprising a flexible light-transmitting packing tube having said light emitting diodes and said flexible substrate packed therein.

9. The flexible light array as claimed in claim 8, wherein said flexible light-transmitting packing tube is coated with a layer of color filter coating.

10. The flexible light array as claimed in claim 1, further comprising a flexible light-transmitting plastic packing layer molded on said flexible substrate over said light emitting diodes.

11. The flexible light array as claimed in claim 10, wherein said flexible light-transmitting plastic packing layer is coated with a layer of color filter coating.

12. A flexible light array fabrication procedure, comprising the steps of:

(a) preparing at least one LED array, each having a plurality of longitudinally and transversely aligned light emitting diodes;

(b) preparing a flexible substrate having a plurality of conducting circuits therein;

(c) electrically connecting the light emitting diodes of said at least one LED array to the conducting circuits of said flexible substrate;

(d) packing said flexible substrate and said at least one LED array with flexible light-transmitting packing means; and

(e) cutting said flexible substrate subject to the desired size.

13. The flexible light array fabrication procedure as claimed in claim 12, wherein said step (d) packs said flexible substrate and said at least one LED array with a flexible light-transmitting plastic packing layer by molding.

14. The flexible light array fabrication procedure as claimed in claim 12, wherein said step (d) packs said flexible substrate and said at least one LED array with a flexible light-transmitting tube.

15. The flexible light array fabrication procedure as claimed in claim 12, wherein said step (e) singulates the device thus obtained into individual flexible light arrays by cutting subject to the desired size.

16. The flexible light array fabrication procedure as claimed in claim 12, further comprising step (f) after said step (e), said step (f) preparing a driving circuit and then electrically connecting said driving circuit to the conducting circuits of said flexible substrate for enabling said driving circuit to turn said light emitting diodes on or off.