Data symbol reading device

• US 5,877,487 A
• Filed: 06/19/1996
• Issued: 03/02/1999
• Est. Priority Date: 06/21/1995
• Status: Expired due to Term

• Current Assignee: Sukai Capital, LLC
• Original Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
• Inventors: Tani, Nobuhiro, Seo, Shuzo, Ishizuka, Yukihiro, Shin, Takeharu, Nukui, Makoto
• Primary Examiner(s): PITTS, HAROLD I
• Application Number:
  US08/666,864
• Time in Patent Office: 986 Days
• Field of Search: 235/465, 235/469, 235/472
• US Class Current: 235/469
• CPC Class Codes: G06K 2207/1018 Source control
• CPC Class Codes: G06K 7/1092 sensing by means of TV-scanning

Abstract

A data symbol reading device is provided with a white light source, a single-color LED light source, and mode selection switches. The reading device is controlled to have a symbol reading mode, a color image scanning mode, and a monochrome image scanning mode based on the position of the selection switches. The reading device transmits data as appropriate to a host computer. Alternatively, the symbol reading device is provided with red, green, and blue single-color light sources, and has the same modes. Further, the symbol reading device may be provided with a three or four color filter wheel and a white light source to generate the color and monochrome images.

Claims

1. A two dimensional data symbol reading device for reading a two dimensional data symbol, said device comprising:

a projecting system which projects a plurality of different colored light beams onto an object;

an imaging system having a light receiving surface, said imaging system outputting a signal corresponding to an image of the object;

an image forming system that forms an image of the object on the light receiving surface of the imaging system;

an output system; and

a mode selecting system that selects one of a plurality of modes of operation of said two dimensional data symbol reading device including an image forming mode of operation in which the object is read and a signal corresponding to the image of the object is output by said output system, and a data symbol decoding mode of operation in which the two dimensional data symbol is read and a signal corresponding to decoded data of the two dimensional data symbol is output by said output system.

2. The data symbol reading device according to claim 1, further comprising a control system that controls the projecting system to project one of white light and another predetermined color of light.

3. The data symbol reading device according to claim 2, the projecting system comprising:

a white light source for emitting said white light; and

another light source for emitting said another predetermined color of light.

4. The data symbol reading device according to claim 1, the projecting system comprising:

a first light source for emitting a first predetermined color;

a second light source for emitting a second predetermined color;

a third light source for emitting a third predetermined color; and

a driving system which selectively drives the first light source, the second light source and the third light source,

the data symbol reading device further comprising;

a control system which controls the driving system to drive only one of said first light source, said second light source and said third light source in response to said mode selecting system selecting said data symbol decoding mode of operation, and for controlling the driving system to sequentially drive said first light source, said second light source and said third light source in response to said mode selecting system selecting said image forming mode of operation.

5. The data symbol reading device according to claim 4, the imaging system outputting a monochrome image in response to said data symbol decoding mode being selected, the imaging system outputting a color image in response to said image forming mode being selected.

6. A data symbol reading device capable of reading a data symbol and of outputting an image signal corresponding to an image of an object, said data symbol reading device comprising:

an imaging device that outputs a signal corresponding to an image of the object;

an optical system for forming an image of the object on a light receiving surface of said imaging device;

an output system;

a mode selecting system that selects between a data symbol reading mode in which said data symbol is read and a signal corresponding to decoded data of the data symbol is output by said output system, and an image forming mode in which said image signal corresponding to the image of the object is output by said output system;

a light projecting system for selectively projecting a plurality of different colored light beams onto the object, said light projecting system changing a color of light in response to said mode selected by said mode selecting system; and

a single processing system for decoding information stored in said data symbol and detected by said imaging device, in response to said data symbol reading mode being selected by said mode selection system, and for generating said image signal, in response to said image forming mode selected by said mode selection system.

7. The data symbol reading device according to claim 6, wherein said imaging device is provided with a color filter, and said imaging device detects color images, said light projecting system being capable of selectively projecting one of white light and monochromatic light.

8. The data symbol reading device according to claim 7, wherein said mode selecting system further selects between a color image forming mode and a monochrome image forming mode,

wherein said light projecting system projects monochrome light in response to said data symbol reading mode being selected,

wherein said light projecting system projects white light in response to said color image forming mode being selected, and

wherein said light projecting system projects one of said monochromatic light and said white light in response to said monochrome image forming made being selected.

9. The data symbol reading device according to claim 6,

wherein said imaging device detects monochromatic light, and wherein said light projecting system is capable of selectively projecting one of a plurality of monochromatic light beams.

10. The data symbol reading device according to claim 9,

wherein said mode selecting system further selects between a color image forming mode and a monochrome image forming mode,

wherein said light projecting system projects one of said plurality of monochromatic light beams in response to said data symbol reading mode being selected,

wherein said light projecting system projects at least two of said plurality of monochromatic light beams in response to said color image forming mode being selected, and

wherein said light projecting system projects one of said plurality of monochromatic light beams in response to said monochrome image forming mode being selected.

11. The data symbol reading device according to claim 10,

wherein said light projecting system projects a first one of said plurality of monochromatic light beams, a second one of said plurality of monochromatic light beams and a third one of said plurality of monochromatic light beams, in order, in response to said color image forming mode being selected, and

wherein said signal processing system generates a first image signal, a second image signal, and a third image signals, in order, in response to said color image forming mode being selected.

12. The data symbol reading device according to claim 6, further comprising a memory for storing data related to a mode of operation of said data symbol reading device.

13. The data symbol reading device according to claim 6,

wherein said data symbol is a two-dimensional data symbol.

14. A data symbol reading device capable of decoding a data symbol and of forming an image of an object said device, comprising:

an illumination unit that illuminates the object, said illumination unit being capable of illuminating the object with a plurality of different colored light beams;

a reading unit that receives an image of the illuminated object, said reading unit outputting an image signal;

an operation mode selection switch which selects one of a plurality of modes of operation of said data symbol reading device, wherein the mode selection switch selects one of a data symbol reading mode, a monochrome image forming mode that forms a monochrome image of the object, and a color image forming mode that forms a color image of the object; and

a control unit that illuminates said illumination unit to illuminate the object with one of said plurality of light beams in accordance with said mode of operation selected by said mode selection switch.

15. The data symbol reading device according to claim 14,

said illumination unit comprising a white light source and a monochromatic light source,

wherein said control unit controls said illumination unit to illuminate said data symbol with monochromatic light emitted by said monochromatic light source in response to said mode selection switch selecting said data symbol reading mode, and

wherein said control unit controls said illumination unit to illuminate the object with white light emitted by said white light source in response to said mode selection switch selecting said color image forming mode.

16. The data symbol reading device according to claim 15,

further comprising a light source selection switch for selecting one of said monochromatic light source and said white light source,

wherein said control unit controls said illumination unit to illuminate the object with monochromatic light emitted by said monochromatic light source in response to said light source selection switch selecting said monochromatic light source and said mode selection switch selecting said monochrome image mode;

and

wherein said control unit controls said illumination unit to illuminate the object with white light emitted by said white light source in response to said light source selection switch selecting said white light source and said mode selection switch selecting said monochrome image mode.

17. The data symbol reading device according to claim 15, wherein said monochromatic light source comprises a plurality of LEDs, and wherein said white light source comprises a plurality of xenon lamps.

18. The data s reading device according to claim 14,

said illumination unit comprising a plurality of monochromatic light sources, each of said monochromatic light sources being a different color,

wherein said control unit controls said illumination unit to illuminate said data symbol with monochromatic light emitted by one of said monochromatic light sources in response to said mode selection switch selecting said data symbol reading mode and said monochrome image forming mode, and

wherein said control unit controls said illumination unit to sequentially illuminate the object with monochromatic light emitted by each of said monochromatic light sources in response to said mode selection switch selecting said color image forming mode.

19. The data symbol reading device according to claim 18, further comprising a light source selection switch for selecting one of said monochromatic light sources.

20. The data symbol reading device according to claim 18, wherein said illumination unit comprises:

a first monochromatic light source having a plurality of red LEDs;

a second monochromatic light source having a plurality of green LEDs; and

a third monochromatic light source having a plurality of blue LEDs.

21. The data symbol reading device according to claim 14, said illumination unit comprising:

a white light source; and

a plurality of light filters, each of said light filters transmitting a different color of light therethrough.