Portable instrument for electro-optically reading indicia and for projecting a bit-mapped color image

• US 6,910,633 B2
• Filed: 10/09/2003
• Issued: 06/28/2005
• Est. Priority Date: 06/27/2000
• Status: Expired due to Term

• Current Assignee: Microvision, Inc.
• Original Assignee: Symbol Technologies, Inc. (Zebra Technologies Corporation)
• Inventors: Katz, Joseph, He, Duanfeng, Joseph, Eugene, Tan, Chinh, Swartz, Jerome
• Primary Examiner(s): Lee, Diane I.
• Application Number:
  US10/682,345
• Publication Number:
  US 20040074971A1
• Time in Patent Office: 628 Days
• Field of Search: 235/462.45, 235/472.01, 235/462.36, 235/462.38, 235/462.48, 235/462.49, 235/469, 235/472.03, 348 67- 70, 348/108, 348/203, 359/443, 359/460
• US Class Current: 235/472.01
• CPC Class Codes: G06K 7/10574 Multiple sources
• CPC Class Codes: G06K 7/10673 Parallel lines
• CPC Class Codes: G06K 7/10772 Moved readers, e.g. pen, wand
• CPC Class Codes: G06K 7/12 using a selected wavelength, e.g. to sense red marks and ignore blue marks

Abstract

A portable instrument incorporates an electro-optical assembly for reading indicia during a reading mode, and for projecting a bit-mapped color image during a display mode. A manually operable switch on the instrument is disposed for selecting one of the modes. The color image is formed by pulsing a plurality of differently colored lasers at selected times on selected scan lines.

Claims

1. A portable instrument for projecting a bit-mapped two-dimensional image in a display mode of operation, and for selectively electro-optically reading indicia in a reading mode of operation, comprising:

a) a housing;

b) an electro-optical assembly supported by the housing, for reading the indicia during the reading mode, and for projecting the bit-mapped two-dimensional image on a viewing surface remote from the indicia during the display mode, the assembly including a light source for generating a light beam and a scanner for sweeping the light beam in a raster pattern of light paths that cover an area of the viewing surface during the display mode, and a controller for pulsing the light source on for causing pixels at selected positions of the beam in the light paths to be illuminated during the display mode, and for pulsing the light source off for causing pixels at other selected positions of the beam in the light paths to not be illuminated during the display mode, the image being comprised of a light pattern of illuminated and non-illuminated pixels on the area of the viewing surface; and

c) a mode selector for selecting one of the modes.

2. The instrument of claim 1, wherein the housing has a size and a shape configured to be held in a user'"'"'s hand during both the display and reading modes.

3. The instrument of claim 1, wherein the assembly includes a reader having a light source for generating a light beam, a light sensor having a field of view and operative for detecting light from the indicia during the reading mode, and wherein the scanner is operative for scanning at least one of the light beam and the field of view during the reading mode.

4. The instrument of claim 3, wherein the indicia is a coded, machine-readable symbol over which said at least one of the light beam and the field of view is scanned, and wherein the sensor is operative for generating an electrical signal corresponding to the symbol, and wherein the reader includes a signal processor for processing the signal to data indicative of the symbol.

5. The instrument of claim 3, wherein the indicia is a human-readable, two-dimensional representation over which said at least one of the light beam and the field of view is scanned, and wherein the sensor is operative for generating an electrical signal corresponding to the representation, and wherein the reader includes a signal processor for processing the signal to data indicative of the representation.

6. The instrument of claim 1, wherein the assembly includes a plurality of light source for generating a plurality of light beams, and wherein the scanner is operative for sweeping the light beams in the raster of light paths that cover the area of the viewing surface, and wherein the controller is operative for pulsing the light source on and off while the light beams are swept over each of the light paths.

7. The instrument of claim 6, wherein the scanner includes a first scan mirror for sweeping the light beams along a first direction, and a second scan mirror for sweeping the light beams along a second direction generally orthogonal to the first direction.

8. The instrument of claim 6, wherein the housing includes a window through which the light beams and the bit-mapped image pass.

9. The instrument of claim 6, wherein the light sources are lasers for generating the light beams as visible laser beams of different colors.

10. The instrument of claim 6, wherein the controller projects the image as alphanumeric characters.

11. The instrument of claim 1, wherein the mode selector is a switch on the housing, and actuable between reading and display states that respectively correspond to the reading and display modes.

12. The instrument of claim 1, wherein the housing is elongated and extends along an axis between opposite end regions, and wherein a window is located at one of the end regions, and wherein the bit-mapped two-dimensional image is projected through the window.