TW556433B - Light focusing and dispersing apparatuses of light source module - Google Patents

Abstract

Light focusing and dispersing apparatuses of a light source module are disclosed. The light focusing and dispersing apparatuses are particularly used in image scanners such as a single pass color scanner. The light-focusing apparatus concentrates light from a light source to form a light beam so as to upgrade the use efficiency of light energy. The light-dispersing apparatus disperses the light beam from the light-focusing apparatus to form red, green and blue light beams to illuminate a document to be scanned. The red, green and blue light beams reflected from the scanned document emit onto array of image sensors comprising red, green and blue light sensitive regions respectively.

Description

556433 V. Description of the invention (1) 5-1 Field of the invention: The present invention relates to a light collecting and splitting device for a light source module, particularly a light collecting and splitting device for a light source module used in an image processing device. 5-2 Background of the Invention:

| Image scanners (image scanning and reading devices) are widely used to optically read planar objects using image sensing elements such as charge-combining elements (C harge-C oup 1 ed Device) And output the image signal to various image processing devices such as computers, photocopiers and fax machines. The cold-cathode tube (C ο 1 d-Cathode Fluorescent Lamp) commonly used as a light source for image scanning devices is facing the problem of low efficiency of light source use and most of the light energy wasted is not used effectively, especially for For single-scan color image scanners. In order to achieve a certain brightness, the current of the cold-cathode tube or the number of cold-cathode tubes must be increased, but this will reduce the life of the cold-cathode tube or increase the cost. In addition, if the image scanner uses a light source with a low brightness, such as a light emitting diode (L i ght-Em i 11 ng D i 〇de), the light energy from the light source and shining on the document to be scanned may be Not strong enough, so that the light signal received by the image sensing element from the document is not strong enough, making the image quality inexhaustible. 556433 5. Description of the invention (2) Ideal. In view of the above-mentioned problems, it is very necessary to propose a solution to overcome the above-mentioned disadvantages, and the present invention meets this demand. 5-3 Objects and Summary of the Invention: An object of the present invention is to provide an image processing device with the ability to select the use of # light sources including light emitting diodes and cold cathode tubes without reducing the intensity of light source illumination and increasing costs. Another object of the present invention is to extend the service life of the light source and improve the efficiency of the use of the light source, so it is also beneficial to environmental protection. Another object of the present invention is to make a weaker light source, such as a light-emitting diode, applicable to an image processing device. In order to achieve the above object, the present invention proposes a light source module collection and beam splitting device. The light source and beam splitting device of the light source module is a device for converging and dispersing incident light from a light source. After the light converges, it disperses and irradiates the red, green, and blue light beams to the document to be scanned. The red, green, and blue light beams are reflected by the document to the image sensor.

Page 6 556433 V. Description of the invention (3) The light collecting and splitting device of the light source module may further include a light collecting device and a light splitting device. The light collecting device collects divergent light from the light source to form a light beam, and the light splitting device disperses the light beam to form red, green, and blue light beams to illuminate a document to be scanned. The red, green, and blue light beams are combined. A plurality of image sensor arrays are reflected from the file, and the image sensor array includes a red light sensing area, a green light sensing area, and a blue light sensing area. The present invention also provides a light splitting device of a light source module. The light splitting device of the light source module includes a light splitting device, wherein the light splitting device disperses incident light from a p source to form red, green, and blue light beams to illuminate a scan. The red, green, and blue light beams are reflected from the file to a plurality of image sensor arrays. The image sensor array includes a red light sensing area, a green light sensing area, and a blue light sensor. Survey area. The foregoing brief description of the invention and the following detailed description are examples only and are not limiting. Other equivalent changes or modifications that do not depart from the spirit of the invention should be included in the patent scope of the invention.

Detailed description of the I-4 invention It must be explained here that the following description contains only necessary elements and steps. Meanwhile, the present invention can be implemented by various conventional software and hardware, and only the system and operation mode required for understanding the present invention are mentioned here. The following will be described in detail in accordance with this 556433 V. Description of the Invention (4)-The drawings attached to the invention. The inclination, 立 立 闽 一 仏 # 依 明 庄思思 图 are not all simple forms. ^ Refer to the first figure No, the light source module 100 displaying an image processing device such as an image scanner is emitting light onto a document 108 during the scanning process. The light source module 100 includes a light source installed on a stage i 0 2, a light collecting device 104 and a light device 106. The light source can be a light emitting diode or a cold cathode tube. The light collecting device 104 is preferably a lens, such as a lenticular lens (

Biconvex Lens) or single convex lens, but other devices with focusing effect such as grating lenses (Grating Lens) can also be used, although the light collecting device 104 shown in the first figure _ is a biconvex lens. The light-collecting device 104 is used to concentrate-or to collect a light beam originally emitted from a light source installed on the stage 102 2. That is to say, the light collecting device 104 collects the light energy from the light source installed on the carrier 1 102 in a concentrated manner, so the light collecting device 104 can effectively use the light energy from the light source installed on the carrier 102. Significantly reduce the waste of light energy, whether the light source used is a light emitting diode or a cold cathode tube. The spectroscopic device 1 06 is preferably 1 稜鏡 (P r i s m), as shown in the first figure. The spectroscopic device 106 may also be another device capable of dispersing incident light from a light source. The spectroscopic device 1 0 6 disperses the concentrated light beam 2 0 0 from the light collecting device 1 0 4 according to the refractive index of light of different wavelengths, and emits a red light beam 202, a green light beam 20 4 and a blue light beam 2 0 6 The scanned file 108 is shown in the second figure. The spectroscopic device 1 06 is located relative to the light collecting device 1 104 and can make the red light beam 2 0 2, the green light beam 2 0 4 and the blue light beam 2 0 6 emitted from the spectroscopic device 10 6 and irradiated on the file 108 And reflected to the image processing device, such as a charge-coupled element (

Page 8 556433 V. Description of the invention (5)

Charge-Coupled Dev ice) and Complementary Metal Oxide Semiconductor

Transistor) image sensing element. Other monochromatic light beams are blocked and only the red, green and blue primary color beams from the spectroscopic device 106 can be incident on the image sensing element after being reflected by the document 108. Image sensor for receiving the three primary color beams of red, green and blue from the spectroscopic device 06

The device array is shown in the third figure. The image sensing element array shown in the third figure includes a red light sensing area 302, a green light sensing area 304, and a blue light sensing area 306. Each image processing device has a plurality of image sensor arrays. & Light device > 106 is located relative to the light collecting device 104 so that the red light beam 2 0 2, the green light beam 2 0 4 and the k light beam 2 0 6 are emitted from the spectroscopic device 1 〇6 and irradiated on the file 108 And reflected by the document 108 to the red light sensing area 3 02, the green light sensing area 3 04 and the blue light sensing area 3 06 of the image sensing element array. In order to make the red light beam 204, the green light beam 204 and the blue light beam 206 shine on the red light sensing area 3 0 of the image sensing element array 2, the green light sensing area 3 04 and the blue light sensing Area 3 0 6

The calculation of the refractive index of the three primary color light beams of the blue, blue, and blue colors in the spectroscopic device 1 06 and the reflection angle of the 108 reflection by the liberal arts department 108. The adjusted spectroscopic device ι06 is compared with the light collecting device 104 and ^ file 108 Location. In the image processing device, the above-mentioned two light devices 104 may be omitted as necessary, that is, when the light source intensity and light energy utilization are not the main considerations, the light source module 100 may use only the spectroscopic device I / 6 to disperse the divergent light sources into Red, green, and blue primary color beams, and the red, green, and blue light sensing areas of the image sensing element array receive red, and blue light signals to synthesize a document image.

Page 9 556433 V. Description of the invention (6) The above-mentioned light collecting device 104 and the spectroscopic device 106 are only examples. The light source module can use a device with light collecting and splitting functions to achieve the light collecting device 1 0 4 with the function of the spectroscopic device 106. This device with the function of collecting and splitting light concentrates the incident light and disperses it, and makes the red, green and blue light beams irradiate the document to be scanned. The red, green and blue light beams are reflected to the image sensor through the document.器 _ The above detailed description of the invention is merely an example and not a limitation. Other equivalent changes or modifications that do not depart from the spirit of the present invention should be included in the patent scope of the present invention.

Page 556433 Brief Description of the Drawings In order to make the other objects, features, and advantages of the present invention more obvious and understandable, a preferred embodiment is given below in conjunction with the accompanying drawings to make a detailed description as follows: One image shows that a light source module of an image processing device of the present invention emits light onto a document during the scanning process; the second image shows that the spectroscopic device disperses the convergent beam from the light collecting device and emits red, green, and blue light Beam; and _ The image sensing element array shown in the third figure includes a red light sensing area, a green light sensing area, and a blue light sensing area. Symbols of the main parts: 1 0 0 light source module 10 2 stage 10 4 light collecting device 1 0 6 light splitting device 1 0 8 file | 2 0 0 converging light beam 2 0 2 red light beam 2 0 4 green light beam 2 0 6 blue light Beam 3 0 2 red light sensing area

Page 11 556433 Simple illustration of the diagram 3 0 4 Green light sensing area 3 0 6 Blue light sensing area

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Claims (1)

556433 6. Scope of patent application 1 · A light collecting and splitting device of a light source module, the light collecting and splitting device of the light source module includes: a device for converging and dispersing incident light from the light source, the device will be incident After the light converges, it disperses and irradiates the red, green, and blue light beams to the document to be scanned. The red, green, and blue light beams are reflected by the document to the image sensor. 2 · The light collecting and splitting device of the light source module according to item 1 of the scope of the patent application, wherein the light source includes a light emitting diode. I 3 · The light collecting and splitting device of the light source module according to item 1 of the scope of patent application, wherein the light source includes a cold cathode tube. 4. The light collecting and splitting device of the light source module according to item 1 of the scope of the patent application, wherein the light collecting and splitting device described above includes a convex lens. 5. The light collecting and splitting device of the light source module according to item 1 of the scope of the patent application, wherein the light collecting and splitting device described above includes a stack. f. The light collecting and splitting device of the light source module according to item 1 of the scope of the patent application, wherein the image sensor described above includes a charge coupled element. 7. The light collecting and splitting device of the light source module according to item 1 of the scope of the patent application, wherein the image sensor described above includes a complementary metal oxide half Page 13 556433 92. 8.14 _Case No. 90133069_Year Month__ VI. Scope of patent application Conductor transistor sensing element. 8. —Light collecting and splitting device of a light source module, the light collecting and splitting device of the light source module includes = a light collecting device, wherein the light collecting device collects incident light from a light source; and a light splitting device, wherein The spectroscopic device disperses the incident beam to form red, green, and blue beams to illuminate a document to be scanned, and the red, green, and blue beams are respectively reflected from the document to a plurality of image sensor arrays, and the image sensing The sensor array includes a red light sensing area, a green light sensing area and a blue light sensing area. 9. The light collecting and splitting device of the light source module according to item 8 of the scope of the patent application, wherein the light source includes a light emitting diode. 10. The light collecting and splitting device of the light source module according to item 8 of the scope of the patent application, wherein the light source includes a cold cathode tube. 11. The light collecting and splitting device of the light source module according to item 8 of the scope of the patent application, wherein the light collecting device described above includes a convex lens. 1 2. The light collecting and splitting device of the light source module according to item 8 of the scope of the patent application, wherein the image sensor described above includes a charge coupled element. Page 14 556433 _Case No. 90133069_. Year and month __ VI. Application for patent scope 1 3. The light collecting and splitting device of the light source module as described in item 8 of the scope of patent application, wherein the above-mentioned image sensor includes complementary Type metal oxide semiconductor transistor sensing element. 1 4. A light splitting device for a light source module, the light splitting device comprising: a light splitting device, wherein the light splitting device disperses incident light from a light source to form red, green, and blue light beams to illuminate a document to be scanned, the red The green and blue light beams are respectively reflected from the file to a plurality of image sensor arrays. The image sensor array includes a red light sensing area, a green light sensing area, and a blue light sensing area. 1 5. The spectroscopic device of the light source module according to item 14 of the scope of patent application, wherein the light source described above includes a light emitting diode. 16. The light splitting device of the light source module according to item 14 of the scope of patent application, wherein the light source includes a cold cathode tube. 1 7. The spectroscopic device of the light source module according to item 14 of the scope of application for a patent, wherein the spectroscopic device described above includes a stack. 1 8. The spectroscopic device of the light source module according to item 14 of the scope of patent application, wherein the image sensor described above includes a charge coupled element. Page 15 556433 6. Application for patent scope 1 9. The spectroscopic device of the light source module as described in item 14 of the patent application scope, wherein the image sensor mentioned above includes complementary metal oxide semiconductor transistor sensing element. Page 16