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Color information measuring device, print object information measuring device, printing device and electrronic equipment

A technology for measuring device and color information, applied in color measuring device, printing, printing press, etc., can solve the problem of high cost, achieve high resolution, improve measuring accuracy, and reduce cost

Inactive Publication Date: 2007-01-17
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] In this way, as a device for measuring information on a printed matter, a device for measuring color information of a printed matter and a device for measuring position information of a printed matter are necessary, resulting in high cost and large size.

Method used

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  • Color information measuring device, print object information measuring device, printing device and electrronic equipment
  • Color information measuring device, print object information measuring device, printing device and electrronic equipment
  • Color information measuring device, print object information measuring device, printing device and electrronic equipment

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Experimental program
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Embodiment Construction

[0186] Hereinafter, the present invention will be described in detail using the illustrated embodiments.

[0187] (first embodiment)

[0188] Figure 1A Shown is the first embodiment of the color information measuring device of the present invention. This first embodiment has a light emitting unit 20, an irradiation lens 21 as an irradiation unit, a condensing lens 23 as a condensing unit, a slit member 24, and a photodiode 25 as a light receiving element. The slit member 24 is disposed between the condensing lens 23 and the photodiode 25 and has a slit 24A.

[0189] The light emitting unit 20 has an LED group composed of a plurality of light emitting diodes whose light emission wavelengths are different from each other. Light-emitting diodes are cheap and have a long life. Since light-emitting diodes with various light-emitting spectra can be mass-produced throughout the entire visible light region, they also have design freedom and are suitable for constituting color info...

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PUM

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Abstract

In the color information measuring device, the print object information measuring device, the printing device and the electronic equipment, three light fluxes of mutually different wavelengths applied to a measurement object from a red LED, a green LED and a blue LED of a light-emitting part have a common illumination area on the measurement object. The common illumination area on the measurement object contains such an observation area on the measurement object that a reflected ray is made to be incident on a photodiode via a condenser lens and a slit member. Therefore, the common illumination area in which three light fluxes of different wavelengths overlap with one another can reliably be made to be an observation area, so that intensities of a plurality of reflected rays of different wavelengths derived from the observation area can be observed equivalently, hence an improved measurement accuracy.

Description

technical field [0001] The present invention relates to a color information measuring device, and as an example, relates to a color information measuring device that irradiates a plurality of light beams of different wavelengths from a light emitting unit to an object to be measured, and measures the reflection of each wavelength from the object to be measured. The intensity of the light is used to digitize the color information of the object to be measured in this way, and output the color information to printing devices such as color printers and color copiers and image display devices such as liquid crystal displays. [0002] In addition, the present invention relates to electronic equipment including such a color information measuring device. [0003] Also, the present invention relates to a printed matter information measuring device that outputs color information and position information of printed matter to, for example, a control unit of a color printer or a color copi...

Claims

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Application Information

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IPC IPC(8): G01J3/46B41J29/38B41F33/00
Inventor 渡部恒久民长隆之和田秀夫
Owner SHARP KK
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