TW560167B - Scanning chassis with a light transparent slot - Google Patents

Abstract

A scanning chassis is suited for scanning a document. The scanning chassis includes a case, a light source, at least one reflector, a lens assembly and an optical sensor. The case has a light transparent slot shaped like a bar form, wherein the widths corresponding to the points along the longitudinal direction of the light transparent slot are not all the same. The light source can illuminate the document and an image can be generated at the place where the document is illuminated by the light source. The image can be projected on the reflector through the light transparent slot. The image can be projected on the lens assembly by the reflector's reflecting the image. The image can be projected on the optical sensor after the image passes through the lens assembly.

Description

JOUIO / V. Description of the invention (1) The present invention relates to a scanning module, and particularly to a scanning module with right and left slits. The scanning mode of the light-transmitting slit of the double-heart-shaped & with the great performance of the computer and the development of technology, in addition to /, and the Internet and multimedia, other related documents or pictures == direct access to the machine Scanners of image patterns to capture text or enter the s sector need to be output through optical signals, which helps to compare images and convert them into digital lines. The images are displayed on: or other electronic products. In the scanning system, B decides to perform actions such as plastic, storage and output. That is, the system applies one of the elements of the scan object f to the scan object f, so that the image & M ~ 2 can be accurately transmitted to the optical sense: image pixels; ,

; Shanghui = The image of the object to be scanned cannot be accurate ::: J 2 4i and Figure 2, where ^ the edge of the image shows the structure ^ The schematic diagram of the interior of the sound spoon; the edge of the second image shows the top of the conventional light-transmitting slit Visual display = set ΓΓ to trace a document 180, and the document 18 ° n * Τ tracing module 100 is arranged in a glass plate package: touch and can move left and right to scan the document 180. The scanning module 100 includes a body U0, a light source 12o, a three-reflector mirror 13o, a lens 14o, an optical sensor 7L piece 150, and a printed circuit board 6o, among which the light source 1o. It is arranged on the light source support base 118 of the housing 110, and is close to one of the glass plates 190. Then, the reflector 130 and the lens 140 are arranged in the housing 1 and the optical sensing element 15 is. It is arranged on the printed circuit board 160 and is electrically connected to it. Page 5 8963twf.ptd 560167 V. Description of the invention (2) The printed circuit board 160 can be fixed on the housing 110. In addition, the casing has a light-transmitting slit 112, which allows the image 124 of the document 190 to illuminate the inside of the casing 11 through the light-transmitting slit 112. The light source, such as the daylight lamp officer, will emit light 1 2 2 and the light 1 2 can penetrate the glass plate 1 90 and irradiate the document 1 0 0, where the document 1 8 0 is illuminated, An image 丨 2 4 will be generated, and the image 1 2 4 will penetrate the glass plate 190, pass through the light-transmitting slit 1 12, and be projected onto the mirror 130 ', and the image will be reflected by the mirror 130. 124 will be projected on a lens 140, and after being refracted by the lens 140, the image 24 will be projected on the optical sensor element 150.

As shown in Fig. 2, the conventional light-transmitting slit 2 is a rectangular shape. In general, 'stray light is easier to enter the housing through the middle position of the light-transmitting slit 1 12 2 and makes the optical sensor element 5 5 the color of the sensor file 180 will be placed on the glass plate by the file 18 The position on the 19 ° is different, which causes the image quality to decrease and the noise to increase. Therefore, the object of the present invention is to provide a scanning module with a light-transmitting slit. H j Ϊ, so that the optical sensing element can reduce the sensing difference caused by the document placed on the glass plate &

The group is adapted to use the above and # of the invention, and proposes a kind of scanning ^ scanning a document. The scanning module includes at least a housing, a reflective mirror, a lens, and an optical sensing element. The shell 〃 and the slit ’are similar to long strips,

Page 6 560167

V. Description of the invention In the length direction, the widths of the corresponding dot positions are not exactly the same. The light source is used to illuminate the document, and an image will be generated where the document is illuminated. The image will pass through the light-transmitting slit and be projected on the reflector, and the image of the document will be projected to the lens by the mirror. After the image of the document passes through the lens, it will be projected on the optical sensor. ^ According to a preferred embodiment of the present invention, in the length direction of the light-transmitting slit, the width of the corresponding two positions is larger than that of the middle position, and the width of the middle position of the light-transmitting slit is determined by the image. The width of the light cone is determined by the amount of error allowed by the reflection angle of the mirror, and the width of the two sides of the light-transmitting slit is determined by the width of the light cone of the image, the error of the reflection angle of the mirror, and the optical sensing element. The amount of error of the allowable tilt is determined. In addition, the shape of the light-transmitting slit is similar to the shape of the double sigma octatype. The sensing element can be a charge-coupled element or a complementary metal-oxide semiconductor image sensing element. The light source can be a daylight tube. As mentioned above, because the width of the light-transmitting slits of the present invention is not the same at the corresponding positions in the length direction, the error allowed by the cone width of the image and the reflection angle of the mirror can be And ^ = the amount of tilt error of the sensing element, etc., so that $ = 7G sensor can reduce the sensing difference caused by the position of the document on the glass plate, thus improving the quality of the sensing image . In order to make the above and other objects, features, and advantages of the present invention obvious, <RTI ID = 0.0> <br />, </ RTI> a preferred embodiment is given below, and in conjunction with the attached drawings, this will be described in more detail as follows:

560167 V. Description of the invention (4) 100 Scanning module 110 Housing 112 Light-transmitting slit 118 Light source holder 120 Light source 122 Light 124 Image 130 Reflector 140 Lens 150 Optical sensor 160 Printed circuit board 180 File 190 Glass plate 200 Scanning module 210 Housing 212 Light-transmitting slit 214 Position on both sides 216 Center position 218 Light source holder 220 Light source 222 Light 224 Image 230 Mirror 240 Lens

8963twf.ptd Page 8 560167 V. Description of the invention (5) 250: Optical sensing element 260 Printed circuit board 280 File 290 Glass plate embodiment Please refer to FIG. 3 and FIG. 4, wherein FIG. A schematic diagram of the internal structure of a scanning module of a preferred embodiment. FIG. 4 is a schematic top view of a light-transmitting slit according to a preferred embodiment of the present invention. A scanning module 200 is suitable for scanning a document 280, and the document 280 is arranged on a glass plate 290. 'The scanning module 2 0 is arranged under the glass plate 290, and can be moved left and right to scan the document. 280. The scanning module 200 includes a housing 210, a light source 220, two reflecting mirrors 230, a lens 240, an optical sensing element 250, and a printed circuit board 260. The light source 220 is arranged in the housing 2 1 0 The light source carrier 2 1 8 is close to one side of the glass plate 290, and the light source 220 is, for example, a daylight tube, the reflector 230 and the lens 240 are arranged in the housing 2 10, and the optical sensor 2 50 is arranged on and electrically connected to the printed circuit board 2 60, and the printed circuit board 2 60 can be locked on the housing 2 1 'and the optical sensing element 250 can be a charge-combining element ( charge coupled device (CCD) or a complementary metal-oxide-semiconductor image sensor (CMOS Image Sensor). In addition, the case 210 has a light-transmitting slit 212, which allows the image 224 of the document 290 to be irradiated to the inside of the case 210 through the light-transmitting slit 212. The light source 220, such as a daylight tube, emits light 2 22 ', and the light 222 can penetrate the glass plate 290 and irradiate the document 280. When the document 280 is irradiated, an image 224 is generated, and the image 224 Can wear

8963twf.ptd Page 9 560167 V. Description of the invention (6) Transparent glass plate 2 9 0 ′ passes through the light-transmitting slit 2 1 2 and is projected onto the reflecting mirror 2 3 0 and is reflected by the reflecting mirror 2 3 0 , The image 2 2 4 will be projected on a lens 24 0, and after being refracted by the lens 2 4 0, the image 2 2 4 will be projected on the optical sensor 2 50. As shown in FIG. 4, the widths of the light-transmitting slits 212 at the corresponding positions in the length direction are not completely the same. Among them, the width of the light-transmitting slit 2 i 2 corresponding to the two positions 214 is larger than the width of the middle position 2 1 6 in the length direction, and the width of the light-transmitting slit 2 1 2 at the middle position 2 1 6 is The width of the light cone of the image 2 2 4 and the allowable error of the reflection angle of the mirror 2 3 0 are determined by multiplying a safety factor; the width of the position 214 on both sides of the light transmitting slit 2 1 2 is determined by the image 224 The light cone width, the error amount allowed by the reflection angle of the mirror 230, and the error amount of the soldering of the optical sensing element 250 to the printed circuit board 2 60 (that is, the tolerance of the tilting error of the optical sensing element 250) Amount), plus a safety factor. Since the width of the middle position 2 1 6 of the light-transmitting slit 2 1 2 has fewer error variation factors, the width of the middle position 2 1 6 of the light-transmitting slit 2 1 2 can be designed to be smaller; however, Since the width of the position 214 on both sides of the light-transmitting slit 212 has many factors of error variation, the width of the position 2 1 4 on both sides of the light-transmitting slit 2 1 2 can be designed to be larger. The shape of the light-transmitting slits 2 1 2 formed thereon is similar to that of the double-later 0-8 type. In addition, the light-transmitting slits 2 1 2 can be formed at the same time as the case 2 10 is produced by injection molding. With the above design concept, the width of the light-transmitting slit 2 1 2 in the middle area is smaller than the width of the two-side area, so that stray light can not easily enter the middle area of the light-transmitting slit 212. Therefore, the optical sensing element 25 0 can be reduced

8963twf.ptd P.10 56〇67 &gt;, Description of the invention (7) The difference in induction caused by the different position of the file 280 on the glass plate 290 can improve the quality of the induction image 2 2 4. In addition, in the above-mentioned scanning module structure, a reflection type is taken as an example, but a transmission mode may also be used. This is a conventional technique and will not be described again here. As mentioned above, since the width of the light-transmitting slits of the present invention is not exactly the same at each point position in the length direction, the amount of error allowed by the light cone width of the image and the reflection angle of the mirror may be And the allowable tilt error amount of the optical sensing element to adjust, so that the optical sensing element can reduce the sensing difference caused by the position of the document on the glass plate, thus improving the quality of the sensing image. Although the present invention has been disclosed as above with a preferred embodiment, it is not the spirit of the present invention. Anyone skilled in this art will not depart from the protection of the present invention. Inside: When some changes and retouching can be made, the park of the present invention is subject to the definition of the scope of patent application attached.

Page 11 560167 Brief Description of Drawings Figure 1 shows the internal structure of a conventional scanning module. FIG. 2 is a schematic top view of a conventional light-transmitting slit. FIG. 3 is a schematic diagram showing an internal structure of a scanning module according to a preferred embodiment of the present invention. FIG. 4 is a schematic view of a light-transmitting slit according to a preferred embodiment of the present invention.

8963twf.ptd Page 12

Claims (1)

560167 1 · A scanning module suitable for scanning a document, the scanning module includes at least: 'a broken body', the casing has a light-transmitting slit, the light-transmitting slit is similar to a long strip, and the The widths of the light-transmitting slits at the corresponding positions in the length direction are not exactly the same; a light source is used to illuminate the document, and an image is generated at the place where the document is irradiated; at least one reflector, the The image will pass through the light-transmitting slit and be projected onto the reflector; a lens, which will cause the image of the document to be projected onto the lens; and / or an optical sensing element, the image of the document After passing through the lens, it will be projected onto the optical sensing element. 2. The scanning module according to item 1 of the scope of the patent application, wherein the width of the light transmitting slit in the length direction is greater than the width of the middle position. ^ ^ 3 The module described in item 2 of the patent claim, wherein the width of the middle position of the light-transmitting slit is determined by the width of the light cone of the Γ image and the / 5 of the reflector. The amount of error households &amp; &amp; 1 as claimed. The second item of the patent scope: the scanning mode, where the transmission 4. If stated, the width of the light cone of the image, the reflection: the positions of the two sides of the slit; Determined by the amount of error allowed. 5. The tracing module described in item 1 of the scope of patent application, wherein the transparent 8% 3twf.ptd Sixth, the scope of the patent application The shape of the light slit &amp; i Ting patent scope 箆] &amp; The sensing element is a scanning module described by a charge-coupled element, in which the optical sensor element ~ Niu Shen Second Special: Wai The scanning module according to item j, wherein the light source is-a fluorescent lamp. The scanning module according to item V, wherein the lamp emits the scanning module described in item 1 of the patent scope, and t is in the above. As the shell material, the light-transmitting slits and slits are also formed in the shell at the same time. Π γ module light-transmitting slits. One image of a file is projected through the light-transmitting slits of the pine group. On the optical sensing element, the light-transmitting slits are similar to long strips, and the widths of the light-transmitting slits at the corresponding positions in the length direction are not completely the same. 1 1 · The light-transmitting slit 2 of the scanning module as described in Item 10 of the scope of the patent application, wherein the width of the light-transmitting slit in the length direction is larger than the width of the middle position. 1 2 · The scanning module light-transmitting slit ′ described in item 丨 丨 of the scope of patent application, wherein the width determining factor of the middle position of the light-transmitting slit includes the width of the light cone of the image. 1 3 · The transmissive slit of the scanning module according to item 丨 丨 in the scope of the patent application, wherein the determinants of the two positions of the transmissive slit include the light cone width of the image and the allowance of the optical sensing element. Hui 1 The amount of skew error. 14. The light transmission slit of the scanning module as described in item 10 of the scope of patent application 560167 6. The scope of the patent application slit, in which the shape of the light transmission slit is similar to the shape of double-shaped &quot; eight. 15. The light-transmitting slit of the scanning module according to item 10 of the patent application scope, wherein the optical sensing element is a charge-coupled element. 16. The light-transmitting slit of the scanning module according to item 10 of the patent application scope, wherein the optical sensing element is a complementary metal-oxide semiconductor image sensing element. 8963twf.ptd Page 15