TW567709B - Scanning chassis with a function to compensate shades of color - Google Patents

Abstract

A scanning chassis with a function to compensate shades of color, in which being suited at least one interference film on one or several piece of reflectors, so that different colors of light will be compensated for the response of shades of color by using the interference film to get a constructive or a destructive interference.

Description

567709 Description of the Invention (1) The present invention relates to a scanning module with a chromaticity compensation function, and more particularly to a device using an interference film to compensate the intensity of color light response. In recent years, with the development of the Internet, the scanner has become an electronic product used by consumers. Generally, the scanners on the market are mainly based on optical scanning. A document is imaged on a photosensitive element by using the principle of optical reflection and lens focusing. The photosensitive element is, for example, a charge-coupled element (Chai: ge couple device, CCD), and the image on the photosensitive element passes through three groups arranged on the photosensitive element. Sensing cell (ce 1 1 array) capture

The latter 'is converted into photocurrent by photoelectric conversion, and is converted into different potential differences by the storage electrode to form an analog signal to represent the chromaticity response of the image projected onto the photosensitive element. Among them, the three groups of sensing cells capture three colors of red light, blue light, and green light, which are projected onto the light sensing element. It can be seen that the analog signal captured from the photosensitive element is composed of three colors of red, blue, and green light with different intensities and proportions, and then converted into a digital signal through a circuit for transmission to a computer for image processing. . Please refer to FIG. 1, which shows a schematic diagram of a conventional scanning module. The scanning module 100 is mainly composed of a housing 102, a light source 104, three reflective lenses 112, 114, lie, a lens 130, and a light sensor. Element 140 is composed. Among them, the light source 104 is disposed on the housing 102, and the reflective lenses 11 2, 11 4, 116, the lens 130, and the photosensitive element 140 are disposed in the housing 102. The light source 1 0 4 projects a light 108 to the file 106. After the light 108 is reflected by the file 106, it is sequentially projected onto the reflecting lens 11 2, 1 1, 4, 11 and then through the lens.

9156twf.ptd Page 4 567709 V. Description of the invention (2) After focusing on 1 3 0, it is projected on the photosensitive element 1 40. Please refer to FIG. 2 at the same time, which shows a schematic diagram of a conventional photosensitive element. There are three rows of side-by-side sensing cells 142 on the photosensitive element 丨 40, in which the light projected on the photosensitive element 408 is red. R, green G, and blue B are three color lights, and are projected on the corresponding sensing cells 142, respectively, and the response intensities of red light r, green light g, and blue light B are obtained (as shown in Figure 9). (Shown). Finally, the intensity and ratio of the three colors of red light R, green light G, and blue light B are converted into the size of the analog signal represented by the photosensitive element. Please refer to FIG. 3 ', which shows a schematic diagram of a conventional signal compensation circuit. Due to the conventional light-coupled element such as a photosensitive element, the response intensity of the sensing cell to red, blue, and green light is different. For example, it has a better response to red light than blue light and green light (as shown in Figure 9), so the intensity of the red, blue, and green chromaticities of the image reflected on the photosensitive element will be different. In order to avoid excessive chrominance differences or saturation of voltage in one color layer, electronic noise, image chromaticity unevenness, etc., are used in the conventional technology, a signal compensation circuit is used, as shown in Figure 3, the signal compensation circuit 1 60 is mainly composed of a video amplifier 16 2, an analog / digital converter 16 4, a sampling circuit 166 and a brightness compensation circuit 68. The analog signal 31 captured by the photosensitive element 140 is converted to a signal 34 by the video amplifier 162, and then transmitted to the analog / digital converter 164, and the sampling circuit 166 captures the signal 3 2 in the video amplifier 1 62, and passes the brightness compensation. After the circuit 6 8 is compensated, it becomes a compensation signal 3 3 and is transmitted to the analog / digital converter 16 4. Finally, the signal obtained after the signal 34 and the compensation signal 33 are synthesized is converted into a digital signal 3 5. The conventional signal compensation circuit 1 50 cannot be used for the chromaticity of a single color light.

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Adjustment, good. In addition, when the chromaticity difference between the three kinds of colored light is too large, the compensation effect is not. Therefore, the purpose of the present invention is to provide a sweep with chromaticity compensation. 忑 Three uses two interferences to be arranged on one or more reflective lenses in the scanning module. Film to achieve the effect of chromaticity compensation. In order to achieve the above object of the present invention, a tracing module with chromaticity compensation function is proposed, which is mainly composed of a housing, a light source, multiple reflective lenses, at least an interference film, a lens, and a photosensitive element. . In the presentation, the light source is arranged on the housing for projecting a light on a document, the reflection lens>, the interference film, the photosensitive element and the lens are arranged in the housing, and the interference film is arranged on the reflection lens. . The light projected by the light source is projected on the photosensitive element through the interfering film, the reflective lens and the lens. In order to achieve the above object of the present invention, a reflective lens module with chromaticity compensation function is proposed, which is mainly composed of multiple reflective lenses and at least one interference film. Among them, the interference film is disposed on the reflective lens. According to a preferred embodiment of the present invention, the interference film is selected from a red light interference film, a blue light interference film, and a green light interference film, for example, and at least one interference film is disposed on one or a part of the reflective lens, for example. On reflective lenses. ... according to a preferred embodiment of the present invention, the interference film is used to generate a constructive interference or a destructive interference. In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is given below, and in conjunction with the accompanying drawings, a β call is described as follows:

9156twf.ptd Page 6 567709 V. Description of the invention (4) Symbols of the drawings: R: red light G · green light B: blue light 31, 32, 33, 34 λ 3 5: signal 51, 5 2, 1 0 8, 1 0 9, 11 0: A-line 100 scanning module 102 housing 104 light source 106 files 112, 114, 116: reflective lens 130 lens 140 light sensor 142 sensor cell 152, 154, 156, 158, 160, 162: Interference film 1 6 0: Signal compensation circuit 1 6 2: Video amplifier 164: Analog / digital converter 1 6 6: Sampling circuit 168: Brightness compensation circuit Refer to FIG. 4 for a preferred embodiment, which illustrates the present invention A schematic diagram of a scanning module with chromaticity compensation in a preferred embodiment. The scanning module 1 〇 〇 is mainly composed of a housing 10 2, a light source 104, a photosensitive element 1 40, a lens 1 3 0, 3

9156twf.ptd Page 7 567709 V. Description of the invention (5) Reflective lenses 11 2, 11 4, 11 6. A red light interference film 1 5 2, a blue light interference film 1 5 4 and a green light interference film 156 Make up. Among them, the light source 104 is disposed on the housing 102, and the reflection lenses 112, 114, 116, the lens 130, and the light receiving element 140 are disposed inside the housing, and the red light interference film 152 is disposed on the reflection lens 112. 154 is disposed on the reflective lens 114, and the blue light interference film 156 is disposed on the reflective lens 116.

As shown in FIG. 4, the light source 1 〇4 generates a light 1 〇8, is projected on the file 106, and is reflected by the file 〇6, and then is projected on the reflective lens 丨 丨 2, 丨 丨 4, 116 'The fault is caused by the interference films 1 52, 1, 54 and 1 56 on the two reflecting lenses 112, 114, 116 respectively, which interfere with the three colors of red light r, green light g, and blue light B in the light 108. The supplementary effect of the increase or decrease in the chromaticity of the three colored lights is then projected onto the lens 130, and after being focused through the lens 130, the image is formed on the photosensitive element 140. Please refer to FIG. 5, which is a schematic diagram showing the thickness of the interference film and the dry light path in FIG. 4. When the light 108 is incident on the second reflecting film 152 on the reflecting lens 12, for example, when it is incident on the interference film at an incident angle 0, a refracted light 5 j with a refraction angle φ is generated and reflected by the reflecting lens ii 2 After that, a reflected light 52 is generated, and finally refracted by the interference film 152 and emitted at the same folding angle P, and an outgoing light 10 with an exit angle of 0 is generated, where the incidence and the refraction angle φ conform to the relationship of n0sin 0 = nlsin p And "is the refractive index of the working milk, and nl is the refractive index of the interference film. As shown in Figure 5, part of the incident light 108 is projected onto the opposite side of the interference film, Guang Er: the emitted light 10 overlaps There is an interference phenomenon. When the interference sheet S is as close as possible to the relationship of 2t / C0S ^ ", where m is an integer;

9156twf.ptd Page 8 567709 V. Description of the invention (6) is the wavelength, which means that the optical path difference (2t / cos p) between the reflected light 110 and the outgoing light 丨 09 is; when the integer multiple of 1, the phase difference is 〇, so that the interference between the reflected light u 〇 and the outgoing light 1 09 has an enhanced effect, and it is a kind of »interferential interference, and when the thickness of the interference film VII meets the relationship of λ, it means that the reflected light 11 〇 and When the optical path difference between the emitted light 109 (2t / C0Si〇 is (m + 1/2) times, that is, the phase difference is redundant, the interference phenomenon between the reflected light and the emitted light 109 has subtraction. ~ &Amp; 凊 Refer to Figure 6, which shows a schematic diagram of destructive interference. When the phase difference between the 3 light 110 and the output light 109 is κ, the phase of the valley of the reflected light 11 ^ Correspondingly, its optical path difference is 1/2 λ, so it produces destructive interference. 'Also please refer to Figure 7', which shows a constructive intention. When the phase difference between the reflected light 110 and the emitted light 10 is 0. The peak of the erection corresponds to the peak of the outgoing light, and its optical path difference is an integer 乜 of λ, so constructive interference occurs. = 士 述 = 原 " For different wavelengths of red, green, and blue light, an interference film with different thicknesses can be configured on the reflection lens to make the image color on the sensing element or two colors of light. ㈣ ， ： You can also consider only the ideal state that a certain chromaticity is uniform. ~ 仏 的 布 0 Please 121 Figure 'It shows the chromaticity response intensity distribution map on the photosensitive element' In this figure 'red Has the highest response intensity, green light G times

567709 V. Description of the invention (7) and the blue light B has the lowest response intensity, while referring to FIG. 9, it shows the chromaticity response intensity distribution map after chromaticity compensation. The constructive interference film is used to improve the green light G. And the response intensity of blue light B is equivalent to that of red light R. Of course, a destructive interference film can also be used to weaken the response intensity of red light R, and a constructive interference film can be used to increase the response intensity of blue light, making it comparable to the response intensity of green light G, or a destructive interference film can be used to weaken The response intensities of red light R and green light G are comparable to the response intensity of blue light. In other words, use appropriate properties (destructive interference or constructive interference) and the number of interference films to make the response intensity uniform. As shown in FIG. 4, in this embodiment, the interference films 1 5 2, 1 5 4, 1 5 6 are respectively arranged on the reflective lenses 1 1 2, 1 1 4, 1 16, but those skilled in the art, It is also possible to arrange the interference film on the partial reflection lens or the same reflection lens to make the following changes: First, please refer to FIG. 10, which shows a schematic diagram of the interference film on the same reflection lens. The interference film 1 5 2, 1 5 4 and 1 5 6 represent the red light interference film, the green light interference film, and the green light interference film, respectively, and are arranged on one of the three reflection lenses 11 2, 11 4, and 116 at the same time, and the red light R Three color lights, green light G, and blue light B are projected on the interference films 152, 154, and 156, respectively, to perform a chromaticity compensation effect for the three color lights of red light R, green light G, and blue light B. Secondly, please refer to FIG. 11, which shows a schematic view of disposing an interference film on each reflection lens. The interference film 1 5 8 is also disposed on the reflection lens 11 2, 11 4, 1 16, and the interference film 1 5 8 For example, it is a red light interference film or a blue light interference film or a green light interference film. This configuration can effect the effect of three compensations for single-color light.

9156twf.ptd Page 10 567709 V. Description of the invention (8) Thirdly, 160 ^ 162 on the lens, which involves a thin film such as a film, so of course, the method needs to be considered according to the response intensity. That is to say, one or more times, the following rarely have the following: 1. The present film has a building strength. 2. The effect of thin hair can be targeted. 3 · The hair film is not easy to damage. Although this book is limited to within the scope of this application, please refer to He intends to familiarize yourself with the light sensor adjustment by choosing a red light stick. Select the appropriate compensation. As described, this advantage: One of the brightest, the brightest, the brightest, the brightest, and the bad, make the invention clear. Any 'Dangke can be attached to the 12th figure, the reflective lens, blue light to any two art pieces to the red 俾 can act as a film attribute. The definition of the patent application scope of the invention shall prevail. Guarantee

9l56twf Ptd page 11, which shows that an interference film is arranged on some of the reflective lenses 112, 114, and an interference film is not arranged on 116. The interference thin light of any two colors of dry and green light in A is subjected to secondary interference. The effect of compensation. Everyone knows that the above-mentioned configuration of the interference film? The chromaticity image 绿 t 绿 of green light and blue light is uniform and the ideal state is two: the response intensity of a suitable number of interference films is adjusted to be the same. -A scanning module with chromaticity compensation to a scanning module with chromaticity compensation, which involves damaging or destructive interference to compensate for different colored light ^ A scanning module with chromaticity compensation, basin light or multiple colored lights Perform one-time compensation or; Type: Scanning module with chromaticity compensation, which has a long life span and high stability. "The preferred embodiment reveals how those skilled in the art are familiar with the above, right τ + ... ,, is not used as a variety of price changes, and does not depart from the fine works of this invention. Figure 2 shows the unintentional scanning module; Figure 2 shows the unintentional photosensitive element; Figure 3 shows a schematic diagram of a conventional signal compensation circuit; Figure 4 shows a preferred embodiment of the present invention. An unintentional example of a scanning module with chromaticity compensation in the embodiment, FIG. 5 shows the unintended thickness of the interference film in FIG. 4 and the light path of the interference light, and FIG. 6 shows a schematic diagram of destructive interference; Fig. 7 shows a schematic diagram of constructive interference; Fig. 8 shows a chromaticity response intensity distribution on a photosensitive element; Fig. 9 shows a chromaticity response intensity distribution after chromaticity compensation, Fig. 10 A schematic diagram of an interference film disposed on the same reflective lens is shown in FIG. 11, a schematic diagram of an interference film disposed on each reflective lens is shown in FIG. 11, and a schematic diagram of an interference film is disposed on a partially reflective lens, and FIG. 12 is shown.

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Claims (1)

567709 VI. Application for Patent Scope 1. A scanning module with chrominance compensation function is suitable for scanning a document. The scanning module with chrominance compensation function includes at least: a housing; a light source, configured at On the housing, the light source is used for projecting a light on the document; a plurality of reflecting lenses are arranged in the housing; at least one interference film is arranged on the reflecting lenses; a lens is arranged on the housing And a photosensitive element disposed in the housing, wherein the light is projected on the photosensitive element through the interference film, the reflective lenses, and the lens. 2. The scanning module with chromaticity compensation function as described in item 1 of the scope of patent application, wherein the interference film is used to cause a destructive interference to the light. 3. The scanning module with chromaticity compensation function as described in item 1 of the scope of patent application, wherein the interference film is used to cause a constructive interference with the light. 4. The scanning module with chromaticity compensation function according to item 1 of the scope of patent application, wherein the interference film is selected from a red light interference film, a blue light interference film, and a green light interference film. 5. The scanning module with chromaticity compensation function according to item 1 of the scope of patent application, wherein the at least one interference film is disposed on one of the reflective lenses. 6. Chroma compensation function as described in item 1 of the scope of patent application 9156twf.ptd Page 13 567709 VI. Patent Application Scanning module, wherein the at least one interference film is arranged on some of the reflective lenses. _ 7. A reflective lens module with chromaticity compensation function, which is suitable for being arranged in a scanning module. '5 HAI tracing module has ^ a light source' for projecting a light on a document. The reflection lens module with degree compensation function includes at least: a plurality of reflection lenses; and at least one interference film disposed on the reflection lenses. 8. The reflective lens module with chromaticity compensation function as described in item 7 of the scope of patent application, wherein the interference film is used to cause a destructive interference to the light. 9. The reflective lens module with chromaticity compensation function according to item 7 of the scope of the patent application, wherein the interference film is used to cause a constructive interference to the light. I. The reflective lens module with chromaticity compensation function as described in item 7 of the scope of patent application, wherein the interference thin film is selected from a red light interference film, a blue light interference film, and a green light interference film. II. The reflective lens module with chromaticity compensation function as described in item 7 of the scope of the patent application, wherein the at least "involved thin film" is disposed on one of the reflective lenses. I2. The reflective lens module with chromaticity compensation function as described in item 7 of the scope of the patent application, wherein the at least "involved thin film" is disposed on some of the reflective lenses.