Non-impact printer with token bit control of data and current regulation signals
US5126759A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1990 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | Jun 26, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2/45
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
An LED printhead or the like includes a data bus for carrying multibit digital image data signals for grey level recording. A token bit signal is generated and shifted through registers upon the printhead to enable image data registers associated with each LED to latch the image data signals in appropriate order. The image data signals control the energization times for recording pixels. A digitally adjustable current mirror controls the level of current to each LED during recording. Digital current data signals for controlling this level of current are also communicated over one of the lines of the data bus. A token bit signal is also used to control the latching of current data signals in registers storing the digital data used for current control.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.