Patent Application
20130277428
1. Technical Field
The present disclosure relates to a barcode, a scanning device for scanning the barcode, and a scanning system.
2. Description of Related Art
Barcodes provide fast and convenient identification of items, such as goods in supermarkets. A typical barcode includes a series of adjacent black bars and white bars (spaces) with variable widths between them. The barcodes can record binary information, for example, a thick white or black bar represents code “1”, and a thin white or black bar represents code “0”. However, the codes that can be represented by the bars of the barcode are limited.
The scanning device for reading the barcodes includes a light source, a lens, a scanning module, and an analog to digital converter (ADC). When the scanning device scans a barcode, the scanning module receives light reflected by the barcode via the lens; the scanning module converts the reflected light into analog voltages and transmits the analog voltages to the ADC. The ADC converts the analog voltages to digital signals, and a computer connected to the scanning device analyzes the barcode according to the digital signals. However, the lens must be disposed in the scanning device, resulting in a bulky and complex scanning device.
Therefore, there is room for improvement in the art.
Many aspects of the embodiments can be better understood with references to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the four views.
Referring to
In the embodiment, the basic property is grayscale. Each of the bars S0, S1 . . . S9 has a different degree of grayscale. The grayscales of the bars S0, S1 . . . S9 are described as follows: the bar S0 is high white; the bar S1 is gray consisting of 10% blackness and 90% whiteness, the bar S2 is gray consisting of 20% blackness and 80% whiteness, the bar S3 is gray consisting of 30% blackness and 70% whiteness, the bar S4 is gray consisting of 40% blackness and 60% whiteness, the bar S5 is gray consisting of 50% blackness and 50% whiteness, the bar S6 is gray consisting of 60% blackness and 40% whiteness, the bar S7 is gray consisting of 70% blackness and 30% whiteness, the bar S8 is gray consisting of 80% blackness and 20% whiteness, the bar S9 is gray consisting of 90% blackness and 10% whiteness. The bars grayscale should be changeable to represent different codes, for example, the bar S0 may represent “9” and the bar S9 may represent “5” (see the next paragraph), they cannot be permanent. In other embodiments, the grayscales of the bars S0, S1 . . . S9 may be changed according to need, for example, high white and deep black, the grayscales of each of the bars S0, S1 . . . S9 also can be changed to polychromatic colors, such as red, or blue, or other color.
In the embodiment, the codes represented by the bars S0, S1 . . . S9 are described as follows: the bar S0 represents number “0”, the bar S1 represents number “1”, the bar S2 represents number “2”, the bar S3 represents number “3”, the bar S4 represents number “4”, the bar S5 represents number “5”, the bar S6 represents number “6”, the bar S7 represents number “7”, the bar S8 represents number “8”, and the bar S9 represents number “9”. In other embodiments, the codes represented by the bars S0, S1 . . . S9 may be changed as needed. The bars S0, S1 . . . S9 can respectively represent the letters “A”, “B”, “C”, “D”, “E”, “F”, “G”, “H”, “I”, “J”.
Referring to
Referring to
Each scanning unit 23 is aligned with a single bar of the bars S0, S1 . . . S9, and includes a light emitting unit 231 and a light sensing unit 232. The width of each scanning unit 23 is not greater than the width of the bars S0, S1 . . . S9. In the embodiment, the light emitting unit 231 includes a light emitting diode D1, and the light sensing unit 232 includes a photodiode D2.
The anode of each light emitting diode D1 is connected to the collector of the transistor Q2, and the cathode of each light emitting diode D1 is grounded. The anode of each photodiode D2 is connected to the processing unit 20, and the cathode of each photodiode D2 is grounded.
The principle of operation of the power manager circuit 10 is illustrated as follows:
Referring to
Although information and the advantages of the present embodiments have been set forth in the foregoing description, together with details of the structures and functions of the present embodiments, the disclosure is illustrative only; and changes may be made in detail, especially in the matters of shape, size, and arrangement of parts within the principles of the present embodiments to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201210117555.5 | Apr 2012 | CN | national |
