Scanner and process for detecting a scan lid open condition
View Patent ↗A scanner and process for detecting a scan lid open condition. The scan lid open condition is detected by aligning two scan bars with one another, illumining one of the scan bars with a predetermined illumining pattern and during the illumining, scanning the illumined scan bar with the other scan bar. The response of the scanning scan bar is compared with an expected response for the illumining pattern with the scan lid closed. If a positive comparison occurs, the scan lid is closed. If a negative comparison occurs, the scan lid is open.
1. A scanner comprising:
a housing having a base and a scan lid openable with respect to the base;
the base comprising:
a platen;
a first scan bar translateably mounted below the platen, the first scan bar having first light source having a plurality of LEDs; and
a drive for translating the first scan bar;
the scan lid comprising:
a second scan bar with the first and second scan bars being alignable with one another, the second scan bar having a second light source having a plurality of LEDs;
and
a controller configurable to control operation of the first and second scan bars, and the drive, the controller configured to:
align the first and second scan bars with one another;
turn on the respective light source in one of the first and a second scan bars and directly illuminate the other of the first and second scan bars using a predetermined illumining pattern of light produced by one or more of the LEDs in the plurality of LEDs in the respective light source;
perform, with the other of the first and second scan bars, a scan of the turned-on one of the first and second scan bars and the predetermined illuminq pattern of light thereof;
compare the response of the scanning scan bar with an expected response for the predetermined illumining pattern with the scan lid closed; and
upon a negative comparison, conclude that the scan lid is open.
2. The scanner of claim 1 wherein the controller is further configured to align the first scan bar in an optimum position with respect to the second scan bar.
3. The scanner of claim 1 further comprising:
an automatic document feeder (ADF) mounted in the scan lid;
a media input area on the scan lid to feed media to be scanned into the ADF; and
a media output area on the scan lid to receive scanned media from the ADF with the controller being further configured in the event the scan lid open condition is detected to direct the ADF to do one of suspend operation and inhibit operation.
4. The scanner of claim 1 wherein the controller is further configured in the event of the scan lid open condition to determine if an image to be scanned has been placed on the platen, and, upon a positive determination that an image has been placed on the platen, select one of the first and second scan bars to perform the scanning of the image and perform a calibration of the selected scan bar and perform a scan of the image with the selected and calibrated scan bar, and upon a negative determination that no image has been placed in the scanner, perform a corrective action.
5. The scanner of claim 1 wherein the controller is further configured to provide a time varying illumining pattern to the illumined scan bar.
6. The scanner of claim 1 wherein the controller is further configured to provide a spatial varying illumining pattern to the illumined scan bar.
7. The scanner of claim 2 wherein the first scan bar is a flatbed scan bar in the base and the second scan bar is in the scan lid adjacent the ADF.
8. A process for detecting and responding to a scan lid open condition of a scanner having a pair of scan bars, the process comprising:
aligning the pair of scan bars with one another, each scan bar having a light source having a plurality of LEDS;
turning on the respective light source in one scan bar of the pair of scan bars and directly illuminating the other scan bar of the pair of scan bars using a predetermined illumining pattern of light produced by one or more of the LEDS in the plurality of LEDs in the respective light source;
performing a scan of the turned-on scan bar with the other scan bar of the pair of scan bars;
comparing the response of the scanning scan bar with an expected response for the predetermined illumining pattern with the scan lid closed; and
upon a negative comparison, concluding that the scan lid is open.
9. The process of claim 8 wherein upon the negative comparison, performing a corrective action.
10. The process of claim 9 wherein performing the corrective action includes at least one of activating a scan lid open alert, suspending operation of an ADF, and inhibiting operation of the ADF.
11. The process of claim 8 wherein upon the negative comparison, determining if an image to be scanned has been placed in the scanner and upon a positive determination that an image to be scanned has been placed in the scanner, selecting one of the pair of scan bars to perform the scanning of the image and performing a calibration of the selected one scan bar of the pair or scan bars and then performing a scan of the image with the selected and calibrated scan bar of the one scan bar of the pair of scan bars, and upon a negative determination that no image has been placed in the scanner, performing a corrective action.
12. The process of claim 8 wherein the predetermined illumining pattern is a time varying pattern.
13. The process of claim 8 wherein the predetermined illumining pattern is a spatial varying pattern.
14. The process of claim 8 wherein aligning the pair of scan bars further comprises moving one scan bar of the pair of scan bars to an optimum position with respect to the other scan bar of the pair of scan bars.
15. A process for detecting a scan lid open condition of a scanner having a first and second scan bar, each scan bar having a light source having a plurality of red LEDs, blue LEDs and green LEDs, the method comprising:
moving the first scan bar and the second scan bar adjacent to one another;
turning on the light source in the first scan bar and directly illuminating the second scan bar using a predetermined illumining pattern of light produced by predetermined illuminated and un-illuminated ones of the plurality of red LEDs, green LEDs and blue LEDs in the light source of the first scan bar;
performing a scan of the first scan bar by the second scan bar;
comparing a response of the second scan bar with an expected response to the predetermined illumining pattern with the scan lid closed; and
upon a negative comparison, concluding that the scan lid is open.
16. The process of claim 15 , further comprising upon the negative comparison, performing a corrective action including at least one of providing a scan lid open alert, suspending operation of an ADF, and inhibiting operation of the ADF.
17. The process of claim 15 , further comprising, upon a positive comparison, calibrating at least one of the first scan bar and second scan bar and then scanning an image.
18. The process of claim 15 wherein the predetermined illumining pattern is a spatial varying pattern.
19. The process of claim 15 wherein the predetermined illumining pattern is a time varying pattern.
20. The process of claim 15 , further comprising upon the negative determination, determining if an image to be scanned is placed on a platen in the scanner and, upon a positive determination that an image has been placed on the platen, calibrating the first scan bar and then scanning the image with the first scan bar.
21. The process of claim 15 , wherein the first scan bar is a flatbed scan bar in a base of the scanner and the second scan bar is in an openable scan lid of the scanner.