BULB SORTING DEVICE AND SORTING METHOD THEREOF

• US 20070211230A1
• Filed: 01/05/2007
• Published: 09/13/2007
• Est. Priority Date: 03/06/2006
• Status: Abandoned Application

• Current Assignee: BenQ Corporation (Qisda Corporation)
• Original Assignee: BenQ Corporation (Qisda Corporation)
• Inventors: Ning, HongNa, Huang, XueGuang
• Application Number:
  US11/620,124
• Publication Number:
  US 20070211230A1
• Time in Patent Office: Days
• US Class Current: 353/122
• CPC Class Codes: G03B 21/2026 Gas discharge type light sources, e.g. arcs
• CPC Class Codes: G03B 27/54 Lamp housings; Illuminating means
• CPC Class Codes: H01J 61/86 with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
• CPC Class Codes: H01J 9/44 Factory adjustment of completed discharge tubes or lamps to comply with desired tolerances

Abstract

A bulb-sorting device is provided. The bulb-sorting device includes a positioning mechanism and a sensing element. The positioning mechanism is for fixing a bulb. The bulb has a first referred object and a second referred object. The first referred object and the second referred object are aligned along a referred axis. The sensing element is for catching a first image of the bulb. After the bulb is rotated by an angle relative to the referred axis, the sensing element captures a second image of the bulb. The first image is compared with the second image, so as to determine whether the bulb is qualified accordingly.

Claims

1. A bulb-sorting device, comprising:

a positioning mechanism for fixing a bulb, wherein the bulb has a first referred object and a second referred object, and the first referred object and the second referred object are aligned along a referred axis; and

a sensing element for catching a first image of the bulb;

wherein after the bulb is rotated by an angle relative to the referred axis, then the sensing element captures a second image of the bulb, and whether the bulb is qualified is determined by comparing the first image with the second image.

2. The device according to claim 1, further comprising a comparing unit for comparing the first image with the second image so to determine whether the bulb is qualified.

3. The device according to claim 1, wherein whether the bulb is qualified is determined according to whether the difference between a first distance and a second distance is smaller than a tolerance, wherein the first distance is the distance between the first referred object and the second referred object in the first image, and the second distance is the distance between the first referred object and the second referred object in the second image.

4. The device according to claim 1, further comprising a display unit for displaying the first image and the second image for a user to compare.

5. The device according to claim 1, further comprising a lens module disposed between the bulb and the sensing element, wherein the sensing element enlarges and shortens an optical path and captures the first image and the second image by the lens module.

6. The device according to claim 1, wherein the bulb further comprising a reflective mask, the referred axis is substantially parallel to a reflective central axis of the reflective mask, the opening of the reflective mask is toward the sensing element, the sensing element captures the first image and the second image of the bulb by the reflective mask.

7. The device according to claim 6, wherein the reflective mask has a parabolic reflective surface or a semi-elliptical reflective surface.

8. The device according to claim 1, further comprising an adjusting mechanism for adjusting and enabling the sensing element to capture the first image and the second image of the bulb.

9. The device according to claim 1, wherein the sensing element is a charge coupled device (CCD), a complementary metal oxide semiconductor (CMOS) sensing element, a digital camera or a digital video recorder.

10. The device according to claim 1, wherein the first referred object is a cathode, and the second referred object is an anode.

11. The device according to claim 1, further comprising a recording unit for recording the first image and the second image for comparison.

12. The device according to claim 1, wherein the angle is substantially equal to 90 degrees.

13. A bulb sorting method, comprising:

positioning a bulb having a first referred object and a second referred object, wherein the first referred object and the second referred object are aligned along a referred axis;

capturing the first image of the bulb;

rotating the bulb by an angle relative to the referred axis;

capturing the second image of the bulb; and

comparing the first image and the second image so as to determine whether the bulb is qualified accordingly.

14. The sorting method according to claim 13, wherein the step of determining whether the bulb is qualified further comprises:

determining whether the bulb is qualified according to whether a difference between a first distance and a second distance is smaller than a tolerance, wherein the first distance is the distance between the first referred object and the second referred object in the first image, and the second distance is the distance between the first referred object and the second referred object in the second image.

15. The sorting method according to claim 13, wherein the step of determining whether the bulb is qualified further comprising:

displaying the first image and the second image for a user to compare and determine whether the bulb is qualified.

16. The sorting method according to claim 13, wherein the step of capturing the first image of the bulb further comprising:

capturing the first image of the bulb by a reflective mask of the bulb, wherein the referred axis is substantially parallel to a reflective central axis of the reflective mask.

17. The sorting method according to claim 16, wherein the step of capturing the first image of the bulb further comprising:

capturing the second image of the bulb by the reflective mask.

18. The sorting method according to claim 13, further comprising:

aligning the image of the first referred object in the first image along a reference coordinate;

recording a first coordinate of the second referred object;

aligning the image of the first referred object in the second image with the reference coordinate;

recording the second coordinate of the second referred object; and

comparing the first coordinate and the second coordinate so as to determine whether the bulb is qualified accordingly.

19. The sorting method according to claim 18, wherein the step of determining whether the bulb is qualified further comprising:

obtaining a shift between the first coordinate and the second coordinate according to the first coordinate and the second coordinate; and

determining whether the shift is smaller than an upper limit so as to determine whether the bulb is qualified accordingly.