Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
TWO-SIDED ILLUMINATING PRINTED CIRCUIT BOARD ASSEMBLY AND ILLUMINATING DEVICE USING THE SAME
Document Type and Number:
WIPO Patent Application WO/2020/227497
Kind Code:
A1
Abstract:
A two-sided illuminating PCBA includes a PCB and a plurality of light sources. The PCB has a front surface, a rear surface and a plurality of through holes penetrating through the front and rear surfaces. The light sources are mounted on the front surface of the PCB and each located at the periphery of one of the through holes in a way that each light source emits light toward the associated through hole in a direction parallel to the front surface. An illuminating device includes a base and the PCBA extending from the base upwardly in a way that the through holes and the light sources are exposed outside the base. As a result, the PCBA can provide two-sided illumination by the light sources that are provided on only one side of the PCB.

Inventors:
JEFFWAY JR (US)
CHO KUO HSIUNG (CA)
Application Number:
PCT/US2020/031828
Publication Date:
November 12, 2020
Filing Date:
May 07, 2020
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
JEFFWAY JR ROBERT W (US)
CHO KUO HSIUNG (CA)
International Classes:
F21V11/00; F21V29/00; F21V29/507; F21V29/508
Foreign References:
US5119174A1992-06-02
US20070041190A12007-02-22
US20110176303A12011-07-21
US20160348852A12016-12-01
US20070081341A12007-04-12
US9057493B22015-06-16
US20100020540A12010-01-28
Attorney, Agent or Firm:
HSU, Greg (Cheng-Kang) (US)
Download PDF:
Claims:
WHAT IS CLAIMED IS:

1. A two-sided illuminating printed circuit board assembly comprising:

a printed circuit board having a front surface, a rear surface and a plurality of through holes penetrating through the front surface and the rear surface; and

a plurality of light sources mounted on the front surface of the printed circuit board in a way that each of the light sources is located at a periphery of one of the through holes and emits light toward an associated one of the through holes in a direction parallel to the front surface.

2. The two-sided illuminating printed circuit board assembly as claimed in claim 1, wherein the through holes of the printed circuit board are aligned in a matrix having a plurality of columns and a plurality of rows, and the light sources are aligned in a same manner with the through holes.

3. The two-sided illuminating printed circuit board assembly as claimed in claim 2, wherein the light sources are LEDs each emitting light from a lateral side thereof.

4. The two-sided illuminating printed circuit board assembly as claimed in claim 3, wherein the light emitted by the LEDs that are located at a first row are blocked by the LEDs that are located at a second row, respectively.

5. The two-sided illuminating printed circuit board assembly as claimed in claim 1, further comprising a control unit mounted on the printed circuit board and electrically connected with the light sources through the printed circuit board for controlling light-emitting effects of the light sources.

6. The two-sided illuminating printed circuit board assembly as claimed in claim 5, wherein the control unit controls the light-emitting effects of the light sources in a way that the light sources display an animated image of a melting candle or a fire flame.

7. An illuminating device comprising:

a base; and

a two-sided illuminating printed circuit board assembly as claimed in claim 1, which extends from the base upwardly.

8. The illuminating device as claimed in claim 7, wherein each of the through holes of the printed circuit board is located adjacent to a downside of the associated light source and the light sources are adapted to emit the light from the downsides thereof.

9. The illuminating device as claimed in claim 7, wherein the through holes of the printed circuit board are aligned in a matrix having a plurality of columns and a plurality of rows, and the light sources are aligned in a same manner with the through holes.

10. The illuminating device as claimed in claim 9, wherein the light sources are LEDs each emitting light from a lateral side thereof; the light emitted by the LEDs that are located at a first row are blocked by the LEDs that are located at a second row, respectively; one single row of the through holes is arranged between the first row of the LEDs and the second row of the LEDs.

11. The illuminating device as claimed in claim 7, wherein the two-sided illuminating printed circuit board assembly comprises a control unit mounted on the printed circuit board and electrically connected with the light sources through the printed circuit board for controlling light-emitting effects of the light sources; the two-sided illuminating printed circuit board assembly is inserted in the base in a way that the control unit is located inside the base and the through holes and the light sources are exposed outside the base.

12. The illuminating device as claimed in claim 11, wherein the control unit controls the light-emitting effects of the light sources in a way that the light sources display an animated image of a melting candle or a fire flame.

13. The illuminating device as claimed in claim 7, wherein the light sources are LEDs each emitting light from a lateral side thereof; the illuminating device comprises a control unit mounted on the printed circuit board and electrically connected with the LEDs to turn the LEDs on and off individually.

14. The illuminating device as claimed in claim 13, wherein the through holes of the printed circuit board are aligned in a matrix having a plurality of columns and a plurality of rows, and the LEDs are aligned in a matrix having a plurality of columns and a plurality of rows in a way that the light emitted by the LEDs that are located at a first row are blocked by the LEDs that are located at a second row, respectively.

15. The illuminating device as claimed in claim 13, wherein the control unit turns the LEDs on and off in a way that the LEDs intermittently display sequential images of candles that minimally differ from each other frame by frame, thereby displaying an animation simulating a melting candle.

Description:
TWO-SIDED ILLUMINATING PRINTED CIRCUIT BOARD

ASSEMBLY AND ILLUMINATING DEVICE USING THE SAME

BACKGROUND OF THE INVENTION

1. Field of the Invention

[0001] The present invention relates generally to illuminating devices and more particularly, to a two-sided illuminating printed circuit board assembly (hereinafter referred to as“PCBA”) and an illuminating device using the PCB A.

2. Description of the Related Art

[0002] The conventional illuminating PCBA is usually provided on a single surface thereof with LEDs for one-sided illumination. If two-sided illumination is needed, the PCBA should be provided on two opposite surfaces thereof with LEDs, which requires complex electronic control over all the LEDs, even when the illuminating effect on the two sides are the same.

SUMMARY OF THE INVENTION

[0003] Therefore, it is an obj ective of the present invention to provide a two- sided illuminating PCBA and an illuminating device using the PCBA, which can provide two-sided illumination by LEDs provided on only one side of the PCBA.

[0004] To attain the above objective, the present invention provides a two- sided illuminating PCBA which includes a printed circuit board (hereinafter referred to as“PCB”) and a plurality of light sources (e.g. single-colored LEDs or RGB LEDs). The PCB has a front surface, a rear surface and a plurality of through holes penetrating through the front surface and the rear surface. The light sources are mounted on the front surface of the PCB and each located at the periphery of one of the through holes in a way that each of the light sources emits light toward an associated one of the through holes in a direction parallel to the front surface.

[0005] To attain the above objective, the present invention provides an illuminating device which includes a base and the aforesaid two-sided illuminating PCB A, wherein the PCBA extends from the base upwardly.

[0006] In other words, the light from each light source is not emitted in the direction the front surface faces, but emitted toward the edge of the opening of the associated through hole on the front surface. As a result, the light is not only visible on the front surface; through the through holes, the light is also visible on the rear surface. Therefore, the light sources provided on only the front surface of the PCBA can show the same illuminating display on the front and rear surfaces of the PCBA at the same time.

[0007] Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the scope of the invention will become apparent to those skilled in the art from this detailed description.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The present invention will become more fully understood from the detailed description given herein below and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein:

FIG. 1 is a front view of an illuminating device according to a first preferred embodiment of the present invention;

FIG. 2 is an enlarged view of a part of the illuminating device;

FIG. 3 is a rear view of the illuminating device; FIGS. 4 and 5 are similar to FIGS. 1 and 3, but showing the illuminating device with an illuminating display of a candle pattern;

FIGS. 6A-6B are similar to FIG. 4, showing that the illuminating device displays an animated image of a melting candle;

FIG. 7 is a front view of an illuminating device according to a second preferred embodiment of the present invention; and

FIG. 8 is a front view of an illuminating device according to a third preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

[0009] Referring to FIG. 1, an illuminating device 10 according to a first preferred embodiment of the present invention includes a base 20, and a two-sided illuminating PCBA 30.

[0010] The base 20 is made of plastics or metal, which is adapted for standing on a desk or a floor. The base 20 is provided with a slot (not shown) for the PCBA 30 to be partially inserted in the slot.

[0011] Referring to FIGS. 1-3, the PCBA 30 includes a PCB 31, a plurality of light sources 32, and a control unit 33. The light sources 32 and the control unit 33 are all mounted on a front surface 311 of the PCB 31. Alternatively, the control unit 33 may be mounted on a rear surface 312 of the PCB 31. When the PCBA 30 is inserted in the aforesaid slot of the base 20, the control unit 33 and the part of the PCB 31 where the control unit 33 is mounted are located in the base 20 and hided therein. The other part of the PCBA 30 are exposed outside the base 20 and extends from the base 20 upwardly.

[0012] The PCB 31 is provided thereon with an integrated circuit layout (not shown) which electrically connects the light sources 32 with the control unit 33. In addition, the PCB 31 has a plurality of through holes 313 penetrating through the front surface 311 and the rear surface 312. The through holes 313 are circular-shaped, but unlimited thereto. The through holes 313 are aligned in a matrix. Specifically speaking, the PCB 31 in this embodiment is shaped as an elongated rectangle, and the through holes 313 thereof are arranged in six columns and many rows.

[0013] The light sources 32 may be single-colored LEDs for emitting single colored light such as white light or yellow light, or RGB LEDs for emitting light with any color. The light sources 32 are located at the peripheries of and adjacent to the through holes 313 of the PCB 31 respectively. Specifically speaking, the light sources 32 are aligned in the same manner with the through holes 313 and associated with the through holes 313 one on one. That is, a single row of the light sources 32 is aligned with a single row of through holes 313. In this embodiment, the light sources 32 are adapted to emit light from a downside 321 thereof, and the downside 321 of each light source 32 is located adjacent to the circular periphery edge of the associated through hole 313. In other words, the light from each light source 32 is not emitted in the direction perpendicular to the front surface 311, but emitted toward the circular edge of the associated through hole 313 in a direction parallel to the front surface 311. Further, the light emitted by a first light source 32 may be blocked by a second light source 32 located below the first light source 32. That is, the light emitted by the light sources 32 located at a first row may be blocked by the light sources 32 located at a second row (next row).

[0014] The control unit 33 includes a plurality of electronic components, such as a microcontroller unit (MCU) and a pulse width modulation (PWM) IC, for controlling the light-emitting effects of the light sources 32, such as light color, brightness and illuminating time.

[0015] For example, the control unit 33 can control the light sources 32 to show an illuminating display of any pattern, such as words, icons, dripping wax, a candle pattern as shown in FIG. 4, etc. The control unit 33 may be programed to light up the light sources 32 in a specific order and control the illuminating time of the light sources 32 to cause the light sources 32 displaying an animated image, such as a melting candle with swaying flame and decreasing length, as shown in FIGS. 4, 6A and 6B. Specifically speaking, the length (height) of the candle shown by the illuminating light sources 32 gradually decreases from the condition shown in FIG. 4 to the condition shown in FIG. 6B with swaying flames of various shapes. That is, by means of programable control unit 33, the LEDs (light sources 32) of two-sided illuminating PCBA 30 can intermittently display sequential images of candles that minimally differ from each other frame by frame, as shown in FIGS. 4, 6 A and 6B, in a controlled time interval, such that the two-sided illuminating PCBA 30 displays an animation simulating a melting candle. As such, the illuminating device 10 provided by the present invention can serve as an electronic candle that is visible from two lateral sides thereof, i.e. front and rear surfaces 311 and 312, thanks to the arrangement of the light sources 32 and the through holes 313 of the PCB 31. In another aspect, the control unit 33 may light up the light sources 32 with different brightness to create a depth of field to cause the light sources 32 displaying a stereo image.

[0016] Because of the through holes 313 of the PCB 31, the light from the light sources 32 is not only visible on the front surface 311, but also visible on the rear surface 312. Therefore, no matter what illuminating display is shown on the front surface 311, the rear surface 312 shows the same illuminating display at the same time. For example, when the front surface 311 shows the candle pattern as shown in FIG. 4, the rear surface 312 also shows the candle pattern as shown in FIG. 5.

[0017] The configuration of the illuminating device of the present invention may be modified to show different kinds of candles or other patterns. For example, the illuminating device according to a second preferred embodiment of the present invention as shown in FIG. 7 uses a relatively shorter and wider PCBA 30 to show the pattern of a relatively shorter and wider candle. The illuminating device according to a third preferred embodiment of the present invention as shown in FIG. 8 is configured like an electronic fireplace by using a transversely disposed PCBA 30 to show the pattern of fire flame.

[0018] One of the technical features of the present invention lies in that the light source 32, which is realized as an LED, emits light from a lateral side thereof, not a top side, and the light emitted from the light source 32 is parallel to the surface 311, on which the light source 32 is mounted, of the PCB 31 and may be blocked by a next light source 32. In this embodiment, the light from the light sources 32 are emitted downward to the base 20, which provide soft ambient illumination. However, the light emitting direction of the light sources 32 is unlimited, which means the light sources 32 are unlimited to be located on the topside of the associated through holes 313. For example, the light sources 32 may be located on the downside of the associated through holes 313 for emitting light upwardly, or located on the left side or right side of the associated through holes 313 for emitting light to the right or to the left.