Portable data collection device with viewing assembly

• US 5,834,754 A
• Filed: 12/12/1996
• Issued: 11/10/1998
• Est. Priority Date: 03/29/1996
• Status: Expired due to Term

• Current Assignee: Symbol Technologies, LLC (Zebra Technologies Corporation)
• Original Assignee: Metanetics Corporation
• Inventors: Feng, Chen, Wang, Ynjiun P.
• Primary Examiner(s): Le, Thien Minh
• Application Number:
  US08/766,428
• Time in Patent Office: 698 Days
• Field of Search: 235/462, 235/472, 235/470, 235/454, 235/469, 250/235, 250/236, 359/214
• US Class Current: 235/472.01
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10732 Light sources
• CPC Class Codes: G06K 7/10881 constructional details of hand-held scanners
• CPC Class Codes: G06K 7/1092 sensing by means of TV-scanning

Abstract

A portable data collection device is disclosed. The device includes an imaging assembly including a two dimensional (2D) photosensor array. The imaging assembly is selectively actuatable with a first trigger for reading a target dataform in the imaging assembly'"'"'s target area and actuatable with a second trigger for capturing a color image of the target object in the target area. The imaging assembly further includes compression circuitry for compressing digital data representative of the target area when the imaging assembly is actuated to capture an image of the target area. The device also includes a viewing assembly to aid an operator in aiming and positioning the device with respect to a target dataform or target object. In one embodiment of the viewing assembly, a liquid crystal display screen is affixed to a pivoting member. When the viewing assembly is actuated an image of the target area is displaced on the display screen. In a second embodiment of the viewing assembly, a manual pivoting member includes an opening. When the pivoting member is positioned a predetermined distance from the operator'"'"'s eye, a view through the opening corresponds to the imaging assembly'"'"'s target area.

Claims

1. An imaging assembly for a portable data collection device adapted to capture and decode an image of a target dataform, the imaging assembly comprising:

a) a housing defining an interior region;

b) a camera assembly supported within the housing and including;

i) a two dimensional photosensor array;

ii) an optic assembly accessible through an opening in the housing and focusing reflected illumination from a two dimensional target area onto the photosensor array, the target area having a vertical extent in a vertical direction and a horizontal extent in a horizontal direction, the horizontal direction being orthogonal to the vertical direction; and

iii) the camera assembly generating a signal representative of an image of the target area;

c) circuitry for decoding portions of the signal corresponding to the image of she target dataform;

d) an illumination assembly including a plurality of light emitting diodes emitting light and a lens array for focusing light from the plurality of light emitting diodes in a two dimensional illumination pattern substantially congruent with the optic assembly target area, the illumination pattern being substantially uniform over the horizontal and vertical extents of the target area; and

e) the plurality of light emitting diodes being disposed on a first circuit board supported within the housing interior region, the lens array being generally planar and supported within th housing interior region, the first circuit board being generally parallel to the lens array, the plurality of light emitting diodes including a first and a second light emitting diode disposed on the first circuit board in respective first and second positions which are spaced apart in both the vertical and horizontal directions and wherein the lens array includes first and second optics which are spaced apart in both the vertical and horizontal directions, the first optic focusing emitted light from the first light emitting diode onto thee target area in a first illumination pattern and the second optic focusing light from the second light emitting diode onto the target areas, the first and second illumination patterns having different illumination intensities at a position in the target area.

2. The imaging assembly of claim 1 wherein the first circuit board and the lens array are spaced apart.

3. The imaging assembly of claim 1 wherein the first circuit board and the lens array are supported in spaced apart slots in inner walls of the housing.

4. The imaging assembly of claim 1 wherein a perimeter of the first circuit board and a perimeter of the lens array are substantially identical in shape and size.

5. The imaging assembly of claim 1 wherein the housing comprises symmetric upper and lower portions.

7. The imaging assembly of claim 1 wherein the light emitting diodes comprise four sets of surface mount light emitting diodes mounted on one side of the first circuit board and the lens array includes four illumination optics, each of the four optics being aligned with a respective different one of each of the four sets of surface mount light emitting diodes.

6. An imaging assembly for a portable data collection device adapted to capture and decode an image of a target dataform, the imaging assembly comprising:

a housing defining an interior region;

a camera assembly supported within the housing and including;

i) a two dimensional photosensor array;

ii) an optic assembly accessible through an opening in the housing and focusing reflected illumination from a target area onto the photosensor array; and

iii) the camera assembly generating a signal representative of an image of the target area;

c) circuitry for decoding portions of the signal corresponding to the image of the target dataform;

d) an illumination assembly including a plurality of light emitting diodes emitting light and a lens array for focusing light from the plurality of light emitting diodes in an illumination pattern substantially congruent with the optic assembly target area;

e) the plurality of light emitting diodes being disposed on a first circuit board supported within the housing interior region, the lens array being generally planar and supported within the housing interior region and forming at least a portion of one side of the housing, the first circuit board being generally parallel to the lens array; and

f) the optic assembly being supported by a second printed circuit board supported within the housing interior region and extending through aligned central openings in the first circuit board and the lens array.

8. An imaging assembly for a portable data collection device adapted to capture and decode an image of a target dataform, the imaging assembly comprising:

a) a housing defining an interior region;

b) a camera assembly supported within the housing and including;

i) a two dimensional photosensor array;

ii) an optic assembly accessible through an opening in the housing and focusing reflected illumination from a target area onto the photosensor array; and

iii) the camera assembly generating a signal representative of an image of the target area;

c) circuitry for decoding portions of the signal corresponding to the image of the target dataform;

d) an illumination assembly including a plurality of light emitting diodes emitting light and a lens array for focusing light from the plurality of light emitting diodes in an illumination pattern substantially congruent with the optic assembly target area;

e) the plurality of light emitting diodes being disposed on a first circuit board supported within the housing interior region the lens array being generally planar and supported within the housing interior region and forming at least a portion of one side of the housing, the first circuit board being generally parallel to the lens array;

f) the plurality of light emitting diodes comprising four sets of surface mount light emitting diodes mounted on one side of the first circuit board and the lens array including four illumination optics, each of the four optics being aligned with a respective different one of each of the four sets of surface mount light emitting diodes and including a vertically oriented cylindrical light entry surface defining a horizontal field of illumination and a horizontally oriented cylindrical light exit surface defining a vertical field of illumination.

9. An imaging assembly for a portable data collection device adapted to capture and decode an image of a target dataform, the imaging assembly comprising:

a housing defining an interior region;

a camera assembly supported within the housing and including;

i) a two dimensional photosensor array;

ii) an optic assembly accessible through an opening in the housing and focusing reflected illumination from a target area onto the photosensor array; and

iii) the camera assembly generating a signal representative of an image of the target area;

c) circuitry for decoding portions of the signal corresponding to the image of the target dataform;

d) an illumination assembly including a plurality of light emitting diodes emitting light and a lens array for focusing light from the plurality of light emitting diodes in an illumination pattern substantially congruent with the optic assembly target area;

e) the plurality of light emitting diodes being disposed on a first circuit board supported within the housing interior region, the lens array being generally planar and supported within the housing interior region and forming at least a portion of one side of the housing, the first circuit board being generally parallel to the lens array; and

f) the illumination assembly including a pair of targeting light emitting diodes extending through openings in the first printed circuit board and the lens array including a pair targeting optics aligned with respective targeting light emitting diodes for producing a targeting illumination intensity distribution having a horizontal portion substantially equal to a horizontal extent of the target area and a vertical portion substantially equal to a vertical extent of the target area.

10. The imaging assembly of claim 9 wherein the pair of targeting optics includes a first targeting optic having a lens with an aspherical light entry surface and a horizontal periodic light exit surface generating the horizontal portion of the targeting illumination intensity distribution and a second targeting optic having a lens with an aspherical light entry surface and a vertical periodic light exit surface generating the vertical portion of the targeting illumination intensity distribution.

11. A portable data collection device for imaging and decoding a captured image of a target dataform, the device comprising:

a) a housing defining an interior region for device electronics;

b) an imaging assembly supported within the housing, the imaging assembly comprising a modular housing and a camera assembly supported within the modular housing, the camera assembly including;

i) a two dimensional photosensor array;

ii) an optic assembly accessible through an opening in the housing and the modular housing and focusing reflected illumination from a two dimensional target area onto the photosensor array, the target area having a vertical extent in a vertical direction and a horizontal extent in a horizontal direction, the horizontal direction being orthogonal to the vertical direction; and

iii) the camera assembly generating a signal representative of an image of the target area;

c) circuitry for decoding portions of the signal corresponding to the image of the target dataform;

d) an illumination assembly including a plurality of light emitting diodes emitting light and a lens array for focusing light from the plurality of light emitting diodes in a two dimensional illumination pattern substantially congruent with the optic assembly target area, the illumination pattern being substantially uniform over the horizontal and vertical extents of the target area;

e) the plurality of light emitting diodes being disposed on a first circuit board supported within the housing interior region, the lens array being generally planar and supported within the modular housing interior region, the first circuit board being generally parallel to the lens array, the plurality of light emitting diodes including a first and a second light emitting diode disposed on the first circuit board in respective first and second positions which are spaced apart in both the vertical and horizontal directions and wherein the lens array includes first and second optics which are spaced apart in both the vertical and horizontal directions, the first optic focusing emitted light from the first light emitting diode onto the target area in a first illumination pattern and the second optic focusing light from the second light emitting diode onto the target area, the first and second illumination patterns having different illumination intensities at a position in the target area; and

f) a trigger extending through an opening in the housing and selectively actuatable to energize the imaging and illumination assemblies.

12. The portable data collection device of claim 11 wherein the first circuit board and the lens array are spaced apart.

13. The portable data collection device of claim 11 wherein the first circuit board and the lens array are supported in spaced apart slots in inner walls of the modular housing.

14. The portable data collection device of claim 11 wherein a perimeter of the first circuit board and a perimeter of the lens array are both substantially identical in shape and size.

15. The portable data collection device of claim 11 wherein the modular housing comprises symmetric upper and lower portions.

17. The portable data collection device of claim 11 wherein the light emitting diodes comprise four sets of surface mount light emitting diodes mounted on one side of the first circuit board and the lens array includes four illumination optics, one of the optics being aligned with each of the four sets of surface mount light emitting diodes.

16. A portable data collection device for imaging and decoding a captured image of a target dataform, the device comprising:

a housing defining an interior region for device electronics;

an imaging assembly supported within the housing, the imaging assembly comprising a modular housing and a camera assembly supported within the modular housing, the camera assembly including;

i) a two dimensional photosensor array;

ii) an optic assembly accessible through an opening in the housing and the modular housing and focusing reflected illumination from a target area onto the photosensor array; and

iii) the camera assembly generating a signal representative of an image of the target area;

c) circuitry for decoding portions of the signal corresponding to the image of the target dataform;

d) an illumination assembly including a plurality of light emitting diodes emitting light and a lens array for focusing light from the plurality of light emitting diodes in an illumination pattern substantially congruent with the optic assembly target area;

e) the plurality of light emitting diodes being disposed on a first circuit board supported within the housing interior region, the lens array being generally planar and supported within the modular housing interior region and forming at least a portion of one side of the modular housing, the first circuit board being generally parallel to the lens array;

f) a trigger extending through an opening in the housing and selectively actuatable to energize the imaging and illumination assemblies; and

g) the optic assembly being supported by a second printed circuit board supported with the modular housing interior region and the optic assembly extending through aligned central openings in the first circuit board and the lens array.

18. A portable data collection device for imaging and decoding a captured image of a target dataform, the device comprising:

a) a housing defining an interior region for device electronics;

b) an imaging assembly supported within the housing, the imaging assembly comprising a modular housing and a camera assembly supported within the modular housing, the camera assembly including;

i) a two dimensional photosensor array;

ii) an optic assembly accessible through an opening in the housing and the modular housing and focusing reflected illumination from a target area onto the photosensor array; and

iii) the camera assembly generating a signal representative of an image of the target area;

c) circuitry for decoding portions of the signal corresponding to the image of the target dataform;

d) an illumination assembly including a plurality of light emitting diodes emitting light and a lens array for focusing light from the plurality of light emitting diodes in an illumination pattern substantially congruent with the optic assembly target area;

e) the plurality of light emitting diodes being disposed on a first circuit board supported within the housing interior region, the lens array being generally planar and supported within the modular housing interior region and forming at least a portion of one side of the modular housing the first circuit board being generally parallel to the lens array; and

f) a trigger extending through an opening in the housing and selectively actuatable to energize the imaging and illumination assemblies;

g) the plurality of light emitting diodes comprising four sets of surface mount light emitting diodes mounted on one side of the first circuit board and the lens array including four illumination optics, each of the four optics being aligned with a respective different one of each of the four sets of surface mount light emitting diodes and including a vertically oriented cylindrical light entry surface defining a horizontal field of illumination and a horizontally oriented cylindrical light exit surface defining a vertical field of illumination.

19. A portable data collection device for imaging and decoding a captured image of a target dataform, the device comprising:

a) a housing defining an interior region for device electronics;

b) an imaging assembly supported within the housing, the imaging assembly comprising a modular housing and a camera assembly supported within the modular housing, the camera assembly including;

i) a two dimensional photosensor array;

ii) an optic assembly accessible through an opening in the housing and the modular housing and focusing reflected illumination from a target area onto the photosensor array; and

iii) the camera assembly generating a signal representative of an image of the target area;

c) a circuitry for decoding portions of the signal corresponding to the image of the target dataform;

d) an illumination assembly including a plurality of light emitting diodes emitting light and a lens array for focusing light from the plurality of light emitting diodes in an illumination pattern substantially congruent with the optic assembly target area;

e) the plurality of light emitting diodes being disposed on a first circuit board supported within the housing interior region, the lens array being generally planar and supported within the modular housing interior region and forming at least a portion of one side of the modular housing, the first circuit board being generally parallel to the lens array;

f) a trigger extending through an opening in the housing and selectively actuatable to energize the imaging and illumination assemblies; and

g) the illumination assembly including a pair of targeting light emitting diodes extending through openings in the first printed circuit board and the lens array including a pair targeting optics aligned with respective targeting light emitting diodes for producing a targeting illumination intensity distribution having a horizontal portion substantially equal to a horizontal extent of the target area and a vertical portion substantially equal to a vertical extent of the target area.

20. The portable data collection device of claim 19 wherein the pair of targeting optics includes a first targeting optic having a lens with an aspherical light entry surface and a horizontal periodic light exit surface generating the horizontal portion of the targeting illumination intensity distribution and a second targeting optic having a lens with an aspherical light entry surface and a vertical periodic light exit surface generating the vertical portion of the targeting illumination intensity distribution.