KR100353091B1 - Method and device for scanning without light source - Google Patents

Abstract

PURPOSE: A method and a device for scanning without light source are provided to scan a subject in accordance with light and shade by reading the light and shade of the subject through a light source being inputted to a prism using natural light and interior light, transmitting an optical signal using a CCD(Charge Coupled Device) through another prism, and recognizing strength and weakness of an external light source as a predetermined level, thereby classifying comparative light and shade in accordance with current light quantity. CONSTITUTION: A scanning device(1) comprises a projection prism(2) and a light inducing prism(3). The projection prism(2) includes a light incident window(4). The light inducing prism(3) includes a light reflection window. Pixels of a CCD(12) are equipped on the light reflection window. A subject is passed to angular points of the projection prism(2) and the light inducing prism(3). A black standard level(9) and a white standard level(10) are mounted on one side or the other side of the angular point corresponding to the first pixel and the last pixel of the CCD(12). A standard level of the light and shade is displayed to convert absolute light quantity into relative light quantity.

Description

Light source scanning method and apparatus therefor {.}

TECHNICAL FIELD The present invention relates to a mobile light source scanning method and a device thereof, and more particularly, to a method and an apparatus for scanning by using general natural light or room light without its own light source.

Conventionally, when constructing a scanner, a strong light is irradiated to a subject, and the emitted light is read using a linear coupled sensor (CCD, abbreviated as "CCD"), which is a linear image sensor. I'm trying to. However, in order to scan using a photoactive device such as a CCD, power for making a strong light source as described above is required separately. Therefore, in order to supply such a light source, a power source such as a secondary battery is required, which not only increases the volume of devices found spatially but also increases the weight and increases the assembly process in the case of an electronic notebook, for example. Productivity is low and uneconomical.

For example, in a thin portable product such as an electronic notebook, a method of screening by a light source is absolutely required, but a similar one is not known before the present application.

Therefore, in case of solving such a problem, for example, the card of the other party can be memorized by scanning through the prism in the field from the inconvenience of having to carry or memorize the other party's business card. There is a need for a device capable of automatically storing and reading numbers and displaying them on display windows such as electronic notebooks.

The present invention reads the contrast of the subject by a light source incident on the prism to read the contrast of the subject using natural light or room light, for example in a thin electronic notebook, and then, through another prism, In this case, the intensity of the external light source is recognized at a predetermined level, and the relative contrast according to the current light quantity is distinguished so as to scan according to the contrast formed in the subject.

In the present invention, the CCD refers to a solid-state image sensor, which is a solid-state image sensor for reading an image, and has a photoelectric conversion function and a scanning function. Among the charge-coupled CCD sensors that perform scanning using the charge transfer function of the MOS sensor and the element itself, which scan by shifting by a clock pulse generated from an electronic circuit by a scanning method. Any can be used. In addition, any one of the one-dimensional image sensor and the two-dimensional image sensor can be used from the arrangement of the pixels, but it is particularly preferable to use the one-dimensional image sensor in which the pixels are arranged in a line.

1 is a perspective view for explaining the present invention,

Figure 2 is a longitudinal cross-sectional view of the installation state of the present invention,

3 is a circuit diagram of an embodiment of the present invention;

4 is an exemplary view in which the present invention is installed in the electronic notebook of the embodiment.

*** Explanation of marks in drawing ***

1 is a scanning device, 2 is a prism for projection, 3 is a light induction prism, 4 is a light incident window, 5 is a light emitting window, 6 and 7 is a reflective surface, 8 is a vertex, 9 is a black reference level, 10 is White reference level, 11 is reflector, 12 is CCD, 13 is CPU, 14 is electronic variable device, 15 is groove, 16 is side, 17 is keyboard, 18 is display window, 19 is pixel, 20 is electronic notebook. .

Hereinafter, the present invention will be described in detail with reference to the accompanying embodiments.

1 is a perspective view illustrating main parts of the present invention, in which 1 is a scanning device and a projection prism 2 and a light guiding prism 3, and the projection prism 2 has a light incident window. (4) The light induction prism 3 below and the light reflection window 5 are shown in Fig. 2, and the pixels of the CCD 12 are symmetrically installed in the light reflection window 5 described above. In addition, the stem 8 of the prisms 2 and 3 is accommodated through the subject 11, and one side or the other side of the stem 8 (shown on the right side of the stem 8 in the drawing). In the position corresponding to the first or end pixel of the CCD 12, a black reference level 9 and a white reference level 10 are installed so that a reference level contrast display for converting the absolute amount of light quantity into a relative amount is provided. have.

In the operation of the present invention having the above-described configuration, as shown in FIG. 2, the external incident light α incident through the light incident window 4 of the projection prism 2 is indicated by a dotted line in FIG. 2. Likewise reflected from the reflecting surface 6 and toward the top 8. At this time, when the subject 11 is on the side of the top 8, the incident light α reflected by the subject 11 is reflected on the reflecting surface 7 of the light guiding prism 3, and then again at the reflecting surface 7. The reflected light is transmitted to the pixels of the CCD 12 through the light reflecting window 5. In this case, the display which distinguishes the reference bar display contrast from the end portion (or the first portion) of the CCD 12 is black so that the contrast of the subject 11 can be recognized at a constant level regardless of the intensity of the external light source. The circuit is configured so that the reference level 9 and the white reference level 10 are displayed and read out to distinguish the relative contrast according to the current amount of light. That is, as can be seen in the circuit shown in the schematic diagram in Fig. 3, a circuit for automatic level adjustment for changing the state contrast of the subject 11 in accordance with the amount of light is required. That is, the electronic volume 14 for adjusting the reference level so that the analog level reference can be programmed when the analog signal from the CCD 12 is received by the CPU 13 through the op amp OP1 as the digital logic logic. Since the automatic discrimination circuit of the scanning level is provided through the subject 11, for example, the part printed on the business card when the printed object in black and white, such as a business card, passes upward or downward through the above-mentioned stem 8. And business cards can be classified into black or white and stored in a memory element of a mechanism such as an electronic notebook. In this case, of course, a device such as a roller may be installed to support the subject 11.

4 illustrates an example in which the apparatus of the present invention is installed in, for example, an electronic notebook.

That is, in the electronic notebook with the keyboard 17 and the display window 18, the light incident window 4 of the scanning device 1 of the present invention described above is provided on one side, and the top of the scanning device 1 The long groove 15 is laid in parallel with the position of 8) to allow the subject 11 to insert and remove a business card, for example. Of course, by installing a roller on both sides or one side of the long groove 15, it can be appropriately adapted to smoothly pass the business card. Therefore, the incident light α incident on the incident window 4 is passed through the top of the projection prism 2 by passing the business card or the like through the long groove 15 so as to scan the business card or the like which becomes the subject 11. ), The light obtained as the light passes or is blocked by the printing portion of the business card, which is the subject 11, and the business card paper, is reflected by the reflecting surface 7 of the light guiding prism 3, and then the CCD is formed through the light emitting window 5. The analog photoelectric signal transmitted to hundreds or thousands of pixels 19 installed on the surface of (12) and obtained here is programmed to reference the level of the analog when it is received by the digital logic logic at the op amp OP1 and the CPU 13. It can be automatically adjusted by the electronic volume 14 for adjustment of the reference level (9) and (10) of black and white so that it can be scanned, and it can be stored in a memory element as well as it is known. For example, the display window 18 of the electronic notebook 20 We can display). Therefore, it is possible to easily know the address, phone number, name, etc. of the business card, and permanent storage is also possible when stored in the nonvolatile memory device.

In addition, in the embodiment of the present invention, although the top of the scanning device 8 is installed in the long groove 15 for passing the business card, when the top of the scanning device 8 of the present invention is installed on one side 16 of the electronic notebook, With a notebook in hand, you can scan not only business cards but also various printed materials, which can also function as a copy function.

As described above, according to the present invention, since an external light source is projected and reflected on a subject through a reflector, the contrast can be transmitted to and stored in a CCD, so that the present invention can be stored in a device such as an electronic notebook. It is an industrially useful invention that can be stored simply by passing a business card through a long groove without being remembered by the keyboard, and also can read the stored information, and also can copy the electronic notebook.

Claims (7)

Projection prism and light guide prism, The projection prism has a light incidence window, the induction prism has a light emission window, the pixel of the CCD is installed symmetrically, and the top of the prism to receive the light through the subject to reflect the light And a reference level of black and white is provided in the first or the last pixel of the CCD to convert the absolute amount of light into a relative amount to display the contrast of the reference level. The method according to claim 1, It is a display that distinguishes the reference bar display contrast from the first or the last pixel of the CCD. The black reference level and the white reference level are displayed, and the circuit is configured to distinguish the relative contrast according to the current light quantity. Lightless source scanning method. It consists of a projection prism (2) and a light guide prism (3), wherein the see-through prism (2) is provided with a light incident window (4), the light guide prism (3) a light emitting window (5) ) Is installed so that the pixels of the CCD 12 are symmetrically installed, and the tops of the prisms 2 and 3 allow the subject 11 to pass therethrough, and the first portion of the CCD 12 or Light source scanning device, characterized in that the reference level (9, 10) of the black, white is provided in the pixel of the end portion. The method according to claim 3, A black bar level (9) and a white reference level (10) are displayed on the pixel of the first or the last part of the CCD 12 to distinguish between the contrast and the relative contrast according to the current amount of light. Light source scanning device characterized in that the circuit for automatic level adjustment is configured to The method according to claim 4, The automatic level adjustment circuit includes an electronic volume for reference level adjustment so that an analog level reference can be programmed when an analog signal from the CCD 12 is received by the digital logic logic through the op amp OP1 to the CPU 13. Light source scanning device characterized in that the automatic determination circuit of the scanning level through the (). delete delete