| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compact optical sensor system to be used in a hard copy device for scanning or printing an image on print media by using an inkjet printing technology. <P>SOLUTION: Several light emitting diodes (LEDs) 120, 122, 124, 126 illuminate a sheet of print media (169), and the light reflected from the sheet is received by one or more photodiodes (108, 110). The photodiode generates signals in response to the light received, and the hardcopy device uses these signals to adjust printing parameters for optimal print quality. Bare silicon dies are directly wire-bonded to a printed circuit board 105 for each component by chip-on board processes and four or more LEDs (blue, green, red and soft orange) can be grouped closely in a smaller space occupied by a single package LED to be produced in a factory. <P>COPYRIGHT: (C)2003,JPO |
