Low voltage differential signaling communication in inkjet printhead assembly

• US 6,726,298 B2
• Filed: 02/08/2001
• Issued: 04/27/2004
• Est. Priority Date: 02/08/2001
• Status: Expired due to Term

• Current Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Original Assignee: Hewlett-Packard Development Company, L.P. (HP Inc.)
• Inventors: Anderson, Daryl E., Schloeman, Dennis J.
• Primary Examiner(s): Nguyen, Thinh
• Assistant Examiner(s): Huffman, Julian D.
• Application Number:
  US09/779,281
• Publication Number:
  US 20020105554A1
• Time in Patent Office: 1,174 Days
• Field of Search: 347/5, 347/9, 347/57, 710/70
• US Class Current: 347/5
• CPC Class Codes: B41J 2/04541 Specific driving circuit
• CPC Class Codes: B41J 2/04586 controlling heads of a type not covered by groups B41J2/04575 - B41J2/04585, or of an undefined type

Abstract

An inkjet printhead assembly is adapted to couple to cabling which is coupled to an electronic controller in an inkjet printing system. The inkjet printhead assembly includes low voltage differential signaling (LVDS) receivers adapted to couple to the cabling, to receive first signals having LDVS levels and to convert the first signals to second signals having second signaling levels.

Claims

1. An inkjet printhead assembly adapted to couple to cabling, which is coupled to an electronic controller in an inkjet printing system, the inkjet printhead assembly comprising:

low voltage differential signaling (LVDS) receivers adapted to couple to the cabling, to receive first signals having LVDS levels, and to convert the first signals to second signals having second signaling Levels;

electronics adapted to receive the second signals;

electronics providing third signals having the second signaling levels; and

LVDS drivers coupled to the cabling and receiving the third signals and converting the third signals to fourth signals having the LVDS levels.

2. The inkjet printhead assembly of claim 1 wherein the second signaling levels comprise transistor—

transistor logic (TTL) signaling levels.

3. The inkjet printhead assembly of claim 1 wherein the second signaling levels comprise complementary metal-oxide semiconductor (CMOS) signaling levels.

4. The inkjet printhead assembly of claim 1 further comprising:

at least one printhead having the LVDS receivers and the electronics.

5. The inkjet printhead assembly of claim 1 further comprising:

a carrier;

N printheads disposed on the carrier; and

a module manger disposed on the carrier and including the LVDS receivers and the electronics and providing fifth signals to the N printheads on the second signals.

6. The inkjet printhead assembly of claim 1 wherein the second signaling levels are the same as selected signaling levels employed in the electronic controller.

7. A method of communicating in an inkjet printhead assembly comprising:

receiving first signals having low voltage differential signaling (LVDS) levels in the inkjet printhead assembly;

converting the first signals to second signals having second signaling levels in the inkjet printhead assembly;

providing third signals having the second signaling levels in the inkjet printhead assembly;

receiving the third signals in the inkjet printhead assembly; and

converting the third signals to fourth signals having the LVDS levels in the inkjet printhead assembly.

8. The method of claim 7 wherein the second signaling levels comprise transistor—

transistor logic (TTL) signaling levels.

9. The method of claim 7 wherein the second signaling levels comprise complementary metal-oxide semiconductor (CMOS) signaling levels.

10. The method of claim 7 wherein the second signaling levels are the same as selected signaling levels employed in an electronic controller of an inkjet printing system which provides the first signals to the inkjet printhead assembly.

11. The method of claim 7 wherein the receiving the first signals and the converting the first signals steps are performed in at least one printhead.

12. The method of claim 7 wherein the inkjet printhead assembly includes a carrier, N printheads disposed on the carrier, and a module manager disposed on the carrier, and wherein the receiving the first signals and the converting the first signals steps are preformed in the module manager.

13. The method of claim 12 wherein the method further comprises:

providing fifth signals from the module manager to the N printheads based on the second signals.

14. An inkjet printhead comprising:

low voltage differential signaling (LVDS) receivers adapted to receive first signals having LVDS levels and to convert the first signals to second signals having second signaling levels;

electronics adapted to receive the second signals;

electronics providing third signals having the second signaling levels; and

LVDS drivers receiving the third signals and converting the third signals to fourth signals having the LVDS levels.

15. The inkjet printhead of claim 14 wherein the second signaling levels comprise transistor—

transistor logic (TTL) signaling levels.

16. The inkjet printhead of claim 14 wherein the second signaling levels comprise complementary metal-oxide semiconductor (CMOS) signaling levels.

17. An inkjet printhead assembly adapted to couple to cabling, which is coupled to an electronic controller in an inkjet printing system, the inkjet printhead assembly comprising:

electronics providing first signals having first signaling levels; and

low voltage differential signaling (LVDS) drivers coupled to the cabling and receiving the first signals and converting the first signals to second signals having LVDS levels.

18. The inkjet printhead assembly of claim 17 further comprising:

LVDS receivers adapted to couple to the cabling, to receive third signals having LVDS levels, and to convert the third signals to fourth signals having the first signaling levels; and

electronics adapted to receive the second signals.

19. The inkjet printhead assembly of claim 17 wherein the first signaling levels comprise transistor—

transistor logic (TTL) signaling levels.

20. The inkjet printhead assembly of claim 17 wherein the first signaling levels comprise complementary metal-oxide semiconductor (CMOS) signaling levels.

21. The inkjet printhead assembly of claim 17 further comprising:

at least one printhead having the LVDS drivers and the electronics.

22. The inkjet printhead assembly of claim 17 further comprising:

a carrier;

N printheads disposed on the carrier, and

a module manager disposed on the carrier and including the LVDS drivers and the electronics and receiving third signals from the N printheads and providing the first signals based on the third signals.

23. The inkjet printhead assembly of claim 17 wherein the first signaling levels are the same as selected signaling levels employed in the electronic controller.