WO2014015595A1

WO2014015595A1 - Contact type image sensor, image and text processing system and processing method

Info

Publication number: WO2014015595A1
Application number: PCT/CN2012/085276
Authority: WO
Inventors: 姜利; 张文波; 孙明丰
Original assignee: 威海华菱光电股份有限公司
Priority date: 2012-07-27
Filing date: 2012-11-26
Publication date: 2014-01-30
Also published as: CN102801889B; CN102801889A

Abstract

Disclosed are a contact type image sensor having a temperature detection function, an image and text processing system and an image processing method. The contact type image sensor comprises a supporting frame body; the frame body is provided with an optical lens therein; the side surface of the optical lens is provided with a light source; the lens is provided with a transparent plate thereabove and a circuit substrate therebelow; the circuit substrate is provided with a photoelectric conversion chip and a signal output component thereon; the contact type image sensor is provided with a temperature sensor thereon; the signal acquired by the temperature sensor is outputted to a peripheral circuit via the signal output component; and when the contact type image sensor operates, the temperature sensor can detect the environment temperatures inside and around the contact type image sensor, so that an appropriate correction factor is employed, thus ensuring image processing accuracy.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to the field of sensors, and in particular to a contact image sensor, a picture processing system, and an image processing method. BACKGROUND OF THE INVENTION A conventional contact image sensor is shown in FIG. 1 and includes a frame 1 for supporting a lens. The frame 1 is provided with an optical lens 2, and a side surface of the optical lens 2 is provided with a light source 3, and a lens 2 is disposed above the lens 2. There is a transparent plate 4, a circuit board 6 is disposed under the lens 2, and a photoelectric conversion chip 5 is disposed on the circuit board 6 directly under the lens 2. The top surface of the photoelectric conversion chip 5 is provided with a photosensitive window, and an internal circuit is provided for photoelectric conversion. The function of the chip 5 is to convert an optical signal into an electrical signal, and a signal output section 7 is provided on the back surface of the wiring board 6. When the image reading device is in operation, the light emitted by the light source 3 is irradiated onto the original through the transparent plate 4, and the image, characters, and the like on the original generate reflected light, and the reflected light passes through the transparent plate 4, and partially reflects the light into the optical lens 2. The reflected light from the other end of the optical lens 2 is irradiated onto the photosensitive window of the photoelectric conversion chip 5, and the photoelectric conversion chip 5 converts the received optical signal into an electrical signal, and outputs it through the signal output unit 7. As the original moves continuously, the image and text information recorded thereon are continuously read, and the image information scanning process of the original is completed. With the rapid development of integrated circuit technology and the application of contact image sensors in special fields such as finance, electronic devices and contact image sensors are becoming smaller and smaller, and the density of heat inside integrated devices and contact image sensors is increasing. The reliability of the photoelectric conversion chip is very sensitive to temperature; and when the contact image sensor is working, the illuminator emits heat while emitting heat, causing the temperature of the illuminator itself to rise slowly, and the illuminance increases with the increase of temperature. The brightness of the body changes, and the heat emitted by the illuminator causes the transmission conductor of the light to expand, affecting the transmission performance of the transmission conductor to light. Existing contact image sensors cannot make corresponding corrections in time due to the above changes in temperature, causing serious distortion of the scanning results, affecting the accuracy of scanning; when the surrounding environment changes drastically, when the temperature is too high or too low The chip on the contact image sensor will work abnormally, affecting the scanning quality, and the existing contact image sensor cannot give a warning. In view of the problem that the contact image sensor of the related art is affected by temperature and the scanning accuracy is poor, an effective solution has not been proposed yet. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a contact image sensor, a picture processing system, and an image processing method to solve the problem that the contact image sensor is affected by temperature and the scanning accuracy is poor. The invention can be achieved by the following measures: A contact image sensor comprising a supporting frame, an optical lens is arranged in the frame, a light source is arranged on the side of the optical lens, and a circuit substrate is arranged below the lens, and the lens is arranged above the lens There is a transparent plate, a photoelectric conversion chip is disposed directly under the lens on the circuit substrate, and a signal output component is disposed on the back surface of the circuit substrate, and the characteristic is that a temperature sensor is disposed on the contact image sensor, and a signal passing signal collected by the temperature sensor is provided. The output component is connected to the peripheral circuit. When the contact image sensor is in operation, the light emitted by the light source is irradiated onto the original through the transparent plate, and a part of the reflected light on the scanned original passes through the transparent plate and enters the optical lens, and exits from the other end of the optical lens. The reflected light is irradiated onto the photoelectric conversion chip, and the photoelectric conversion chip converts the received optical signal into an electrical signal and outputs it through the signal output component. At this time, the temperature sensor can quickly detect the temperature of the region, and pass the temperature parameter through the signal. Output component output, image processing system can root According to the obtained temperature parameter, the electric signal converted by the photoelectric conversion chip is corrected by using a suitable correction coefficient to obtain a more accurate image scanning result; when the temperature parameter outputted by the temperature sensor is abnormal, the system can detect and react quickly. , interrupt the work of the contact image sensor, or issue a wait command, and continue to work after the temperature returns to normal. The temperature sensor of the present invention can be disposed at the light source of the contact image sensor to detect the temperature of the light source and correct the change of the light source. The temperature sensor in the present invention may be disposed on the front surface of the line substrate of the contact image sensor to detect the temperature of the photoelectric conversion chip and correct the change of the photoelectric conversion chip. The temperature sensor in the present invention can be disposed on the back surface of the circuit substrate of the contact image sensor to detect the temperature of the surrounding environment, correct the temperature change of the surrounding environment, and the user can freely select the sensor model according to the needs, and the replacement is convenient. The temperature sensor in the present invention can be disposed on the transparent plate of the contact image sensor to prevent the original from passing through the surface of the transparent plate, repeatedly rubbing to generate heat, and the temperature is too high. The temperature sensor in the present invention may be a sensor whose output signal changes with temperature, such as a thermistor, an integrated temperature sensor chip, etc., different temperature output different temperature parameters, and the image processing system may be different according to different The temperature parameters are based on the appropriate correction factor. The temperature sensor in the present invention may be a switching device that controls the conduction and disconnection of the circuit by a temperature change, such as a thermal protector, etc., and automatically cuts off the power when the temperature is too high. The temperature sensor of the present invention can be connected to the alarm device of the contact image sensor, and an alarm is issued in time when the temperature is abnormal. A graphic processing system includes any of the contact image sensors provided by the present invention for reading graphic information on an original, and outputting an electrical signal corresponding to the graphic information and a temperature signal when reading the graphic information; And a graphic processing device, connected to the contact image sensor, for receiving the temperature signal and the electrical signal, and correcting the electrical signal according to the temperature signal. A graphic processing method includes: reading graphic information on an original by a contact image sensor, and outputting an electrical signal corresponding to the graphic information, wherein the contact image sensor is any contact image provided by the present invention a sensor; when the contact image sensor reads the graphic information on the original, acquires the temperature inside and/or around the contact image sensor to obtain a temperature signal; and corrects the electrical signal output by the contact image sensor according to the temperature signal to obtain Correcting the electrical signal; and obtaining the graphic information corresponding to the corrected electrical signal. In the graphic processing method of the present invention, correcting the electrical signal output by the contact image sensor according to the temperature signal comprises acquiring a correction coefficient a corresponding to the temperature signal; and calculating the corrected electrical signal by using the following formula: V=axV _S) , Wherein, V _iM is an electrical signal output by the contact image sensor. In the graphic processing method of the present invention, obtaining the correction coefficient a corresponding to the temperature signal comprises: acquiring the reference electrical signal V _{3⁄4 s} corresponding to the temperature signal _; and calculating the correction coefficient a by using the following formula: a= V _3⁄4s / V _ffifi , Where V is the electrical signal output by the contact image sensor at normal temperature. The graphic processing method of the present invention further includes: determining, according to the temperature signal, whether the temperature inside and/or around the contact image sensor exceeds a preset temperature range; and when the temperature inside and/or around the contact image sensor exceeds a preset temperature In the range, the contact image sensor is controlled to be powered off. The invention has the beneficial effects that when the contact image sensor is in operation, the temperature sensor can detect the temperature of the contact image sensor and its surrounding environment, and adopt appropriate correction coefficients to ensure the accuracy of image processing; further, in contact type When the image sensor and its surrounding environment exceed the rated temperature, a warning is given, the contact image sensor is interrupted, or a waiting command is issued, and the operation continues after the temperature returns to normal. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in FIG. In the drawing: 1 is a schematic cross-sectional view of a contact image sensor according to a prior art; FIG. 2 is a cross-sectional view of a contact image sensor according to Embodiment 1 of the present invention; FIG. 3 is a cross section of a contact image sensor according to Embodiment 2 of the present invention; Figure 4 is a cross-sectional view of a contact image sensor according to Embodiment 3 of the present invention; Figure 5 is a cross-sectional view of a contact image sensor according to Embodiment 4 of the present invention; Figure 6 is a contact type according to Embodiment 5 of the present invention; FIG. 7 is a schematic block diagram of a graphics processing system according to Embodiment 6 of the present invention; and FIG. 8 is a flowchart of a graphics processing method according to Embodiment 7 of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. Embodiment 1 As shown in FIG. 2 , the contact image sensor includes a supporting frame 1 , and an optical lens 2 is disposed in the frame 1 , and a light source 3 is disposed on one side of the optical lens 2 , and the light source 3 is adjacent to the light source 3 . A temperature sensor 8 is disposed on the frame 1 to detect the temperature in the vicinity of the light source 3, a transparent plate 4 is disposed above the lens 2, a circuit board 6 is disposed below the lens 2, and a signal output member 7 is disposed on the back surface of the circuit board 6. The front surface of the circuit board 6 is located directly below the lens 2 and is provided with a photoelectric conversion chip 5. The top surface of the photoelectric conversion chip 5 is provided with a photosensitive window, and an internal circuit is provided. The function of the photoelectric conversion chip 5 is to convert the optical signal into an electrical signal. The working principle of the contact image sensor is as follows: When the contact image sensor is in operation, the light emitted by the light source 3 is irradiated onto the original through the transparent plate 4, and the original is scanned, and part of the reflected light of the scanned original is reflected to the transparent plate. 4. The optical lens 2 enters the optical lens 2 through the transparent plate 4, and is emitted from the other end of the optical lens 2 to the photoelectric conversion chip 5. The photoelectric conversion chip 5 converts the received optical signal into an electrical signal, and outputs it through the signal output unit 7. As the scanning progresses, the temperature of the light source 3 gradually rises, and the luminance of the light source 3 at different temperatures is different, and thus the influence of the temperature on the light source 3 further affects the accuracy of the scanning. The temperature sensor 8 is capable of detecting the temperature of the light source 3 quickly and in real time, and outputs the detected temperature signal through the signal output unit 7 to externally The image processing system corrects the electrical signal converted by the photoelectric conversion chip 5 by using an appropriate correction coefficient according to the obtained temperature parameter, and obtains an accurate image scanning result. In this embodiment, the electrical signal output by the contact image sensor is corrected based on the detected temperature signal to obtain an accurate teletext scan result. With the contact image sensor of this embodiment, the output electrical signal can be corrected, thereby avoiding the influence of the temperature variation of the light source on the scanning accuracy and improving the scanning accuracy. Embodiment 2 As shown in FIG. 3, the contact image sensor includes a supporting frame 1 , an optical lens 2 is disposed in the frame 1 , a light source 3 is disposed on one side of the optical lens 2 , and a transparent portion is disposed above the lens 2 The board 4 is provided with a circuit board 6 below the lens 2. The back side of the circuit board 6 is provided with a signal output member 7. The front surface of the circuit board 6 is located directly below the lens 2, and is provided with a photoelectric conversion chip 5, and a circuit around the photoelectric conversion chip 5. The board 6 is provided with a temperature sensor 8, and the top surface of the photoelectric conversion chip 5 is provided with a photosensitive window, and an internal circuit is provided. The function of the photoelectric conversion chip 5 is to convert the optical signal into an electrical signal. The working principle of the contact image sensor is as follows: When the contact image sensor is in operation, the light emitted by the light source 3 is irradiated onto the original through the transparent plate 4, and the original is scanned, and part of the reflected light of the scanned original is reflected to the transparent plate. 4. The optical lens 2 enters the optical lens 2 through the transparent plate 4, and is emitted from the other end of the optical lens 2 to the photoelectric conversion chip 5. The photoelectric conversion chip 5 converts the received optical signal into an electrical signal, and outputs it through the signal output unit 7. As the scanning progresses, the heat generated by the operation of the electrical components on the circuit board 6 gradually increases, so that the temperature around the photoelectric conversion chip 5 gradually rises, and the photoelectric conversion chip 5 is very sensitive to temperature changes, for the same The optical signal outputs different voltage values at different temperatures. Therefore, the influence of the temperature on the photoelectric conversion chip 5 further affects the accuracy of the scanning. The temperature sensor 8 detects the temperature of the photoelectric conversion chip 5 quickly and in real time, and outputs the detected temperature signal through the signal output unit 7, and the image processing system can convert the photoelectric conversion chip 5 by using a suitable correction coefficient according to the obtained temperature parameter. The electrical signal is corrected to obtain an accurate image scan result. The contact image sensor of the embodiment can output the temperature signal around the photoelectric conversion chip in real time, and correct the output electrical signal according to the temperature signal, thereby avoiding the influence of the temperature variation around the chip on the scanning accuracy, and improving the effect. Scan accuracy. Embodiment 3 As shown in FIG. 4, the contact image sensor includes a supporting frame 1 , an optical lens 2 is disposed in the frame 1 , a light source 3 is disposed on one side of the optical lens 2 , and a transparent portion is disposed above the lens 2 The plate 4 is provided with a temperature sensor 8 on the transparent plate 4, and a circuit board 6 is disposed under the lens 2. The back surface of the circuit board 6 is provided with a signal output member 7, and the front surface of the circuit board 6 is located at the lens 2. Directly below, a photoelectric conversion chip 5 is disposed. The top surface of the photoelectric conversion chip 5 is provided with a photosensitive window, and an internal circuit is provided. The function of the photoelectric conversion chip 5 is to convert the optical signal into an electrical signal. The working principle of the contact image sensor is as follows: When the contact image sensor is in operation, the light emitted by the light source 3 is irradiated onto the original through the transparent plate 4, and the original is scanned, and part of the reflected light of the scanned original is reflected to the transparent plate. 4. The optical lens 2 enters the optical lens 2 through the transparent plate 4, and is emitted from the other end of the optical lens 2 to the photoelectric conversion chip 5. The photoelectric conversion chip 5 converts the received optical signal into an electrical signal, and outputs it through the signal output unit 7. As the scanning progresses, the original quickly passes through the surface of the transparent plate 4, and rubs against the transparent plate 4, generating a large amount of heat. Since the space of the contact image sensor is relatively closed, a large amount of heat generated does not flow out, and the temperature rises. Affect the normal operation of the contact image sensor, affecting the accuracy of the scan. At this time, the temperature sensor 8 can detect the temperature of the transparent plate 4 quickly and in real time, and output the detected temperature signal through the signal output unit 7, and the image processing system can perform the electrical signal output by the contact image sensor according to the obtained temperature parameter. Correction to get accurate graphic scan results. The contact image sensor of the embodiment can output the temperature signal of the transparent plate 4 in real time, and correct the output electrical signal according to the temperature signal, thereby avoiding the influence of the excessive temperature of the transparent plate 4 on the scanning accuracy and improving Scan accuracy. Further, in this embodiment, when the temperature of the transparent plate 4 rises to a higher temperature and exceeds a preset safe temperature range, the contact image sensor may be suspended to prevent damage of the contact image sensor. , or use the cooling measures to cool the contact sensor to enhance the safety of the contact image sensor. Embodiment 4 As shown in FIG. 5, the contact image sensor includes a supporting frame 1 in which an optical lens 2 is disposed, and one side of the optical lens 2 is provided with a light source 3, and a lens 2 is provided with a transparent surface. The board 4 is provided with a circuit board 6 below the lens 2. The back side of the circuit board 6 is provided with a signal output unit 7, a temperature sensor 8 and a red alarm indicator 9. The front side of the circuit board 6 is located directly below the lens 2. The conversion chip 5, the top surface of the photoelectric conversion chip 5 is provided with a photosensitive window, and an internal circuit is provided. The function of the photoelectric conversion chip 5 is to convert the optical signal into an electrical signal. The working principle of the contact image sensor is as follows: When the contact image sensor is in operation, the light emitted by the light source 3 is irradiated onto the original through the transparent plate 4, and the original is scanned, and part of the reflected light of the scanned original is reflected to the transparent plate. 4. The optical lens 2 enters the optical lens 2 through the transparent plate 4, and is emitted from the other end of the optical lens 2 to the photoelectric conversion chip 5. The photoelectric conversion chip 5 converts the received optical signal into an electrical signal, and outputs it through the signal output unit 7. When the ambient temperature changes, the scanning effect of the contact image sensor is affected, and the temperature sensor 8 detects the temperature of the environment around the contact image sensor in real time, and outputs the detected temperature signal through the signal output unit 7 so that The external graphic processing device corrects the electrical signal output by the contact image sensor according to the temperature signal to obtain an accurate graphic scan result. The contact image sensor of the embodiment can output the temperature signal in the vicinity of the contact image sensor in real time, and correct the output electrical signal according to the temperature signal, thereby avoiding the temperature change near the contact image sensor being too large to scan. The accuracy is improved and the scanning accuracy is improved. In addition, since the temperature sensor 8 is mounted on the back side of the circuit board 6, the user can freely select the sensor model as needed, and the replacement is convenient. Further, in this embodiment, when the ambient temperature changes greatly, the operation of the contact image sensor may be abnormal, and therefore, when the ambient temperature changes exceed the preset temperature change rate, the back of the circuit board 6 The temperature sensor 8 can detect the temperature of the surrounding environment and give an alert through the alarm device 9 to remind the user to take corresponding temperature protection measures in time. Embodiment 5 As shown in FIG. 6 , the contact image sensor includes a supporting frame 1 , and an optical lens 2 is disposed in the frame 1 , and a light source 3 is disposed on one side of the optical lens 2 , and a transparent portion is disposed above the lens 2 . The board 4 is provided with a circuit board 6 below the lens 2. The back side of the circuit board 6 is provided with a temperature sensor, a heat protector 8 and a signal output unit 7. The front side of the circuit board 6 is located directly below the lens 2 and is provided with photoelectric conversion. The chip 5, the top surface of the photoelectric conversion chip 5 is provided with a photosensitive window, and an internal circuit is provided. The function of the photoelectric conversion chip 5 is to convert the optical signal into an electrical signal. The working principle of the contact image sensor is as follows: When the contact image sensor is in operation, the light emitted by the light source 3 is irradiated onto the original through the transparent plate 4, and the original is scanned, and part of the reflected light of the scanned original is reflected to the transparent plate. 4. The optical lens 2 enters the optical lens 2 through the transparent plate 4, and is emitted from the other end of the optical lens 2 to the photoelectric conversion chip 5. The photoelectric conversion chip 5 converts the received optical signal into an electrical signal, and outputs it through the signal output unit 7. As the scanning progresses, the devices on the circuit board 6 work to generate heat, so that the temperature of the circuit board 6 gradually rises. At this time, the temperature sensor 8 on the back surface of the circuit board 6 can quickly cut off the contact image sensor when the temperature reaches its rated value. The power supply prevents the scanning result of the contact image sensor from being distorted. In any of the above embodiments, preferably, when performing electrical signal correction, the following correction method may be adopted: according to the characteristics of the contact image sensor, corresponding correction coefficients a are set corresponding to different temperature or temperature ranges, When correcting, the corresponding correction coefficient a is determined according to the temperature signal, and then the correction coefficient a is multiplied by the actual output electrical signal to obtain the corrected electrical signal, and then the image on the original is obtained according to the corrected electrical signal and/or text information. Among them, when the temperature sensor is set at different positions, the correction coefficient is also different. In any of the above embodiments, the temperature sensor 8 may be a sensor whose output signal changes with temperature, such as a thermistor, an integrated temperature sensing chip, etc., detecting different temperature signals and outputting different temperature signals. . The graphic processing system provided by the specific embodiment is described below, and the contact image sensor in the graphic processing system may be the contact image sensor of any of the above embodiments. Embodiment 6 As shown in FIG. 7, the graphic processing system includes a contact image sensor and a graphic processing device. The contact image sensor is configured to read graphic information on the original and output an electrical signal corresponding to the graphic information. At the same time, when reading the graphic information, the temperature inside or around the contact image sensor is detected in real time, and the temperature signal is output. The graphic processing device is connected to the contact image sensor, and the graphic processing device is configured to receive the temperature signal and the electrical signal, and correct the electrical signal according to the temperature signal, and finally obtain the graphic on the original according to the corrected electrical signal. Information, the specific correction method can use the correction method described above. With the graphic processing system of this embodiment, the contact image sensor reads the graphic information on the original while outputting the electrical signal and the temperature signal, and the graphic processing device obtains the graphic information on the original according to the electrical signal, according to the temperature. The signal corrects the electrical signal, thereby avoiding the influence of temperature on the electrical signal and improving the accuracy of acquiring the graphic information. Further, when detecting the abnormal temperature of the output of the contact image sensor, the graphic processing device quickly reacts, interrupts the operation of the contact image sensor, or issues a waiting command, and continues to work after the temperature returns to normal. The graphic processing method provided by the specific embodiment is described below, and the contact image sensor applied in the graphic processing method may be the contact image sensor of any of the above embodiments. Embodiment 7 As shown in FIG. 8, the graphic processing method includes the following steps S102 to S108. Step S102: reading the graphic information on the original by the contact image sensor, and outputting the electrical signal corresponding to the graphic information. Step S104: When the contact image sensor reads the graphic information on the original, the temperature inside and/or around the contact image sensor is obtained, and a temperature signal is obtained. Step S106: Correcting the electrical signal output by the contact image sensor according to the temperature signal to obtain a corrected electrical signal. Step S108: Acquire graphic information corresponding to the corrected electrical signal. With the graphic processing method of the embodiment, the contact image sensor reads the graphic information on the original while outputting the electrical signal and the temperature signal, and when acquiring the graphic information on the original according to the electrical signal, the electrical signal is firstly based on the temperature signal. Correction is performed to avoid the influence of temperature on the electrical signal, and the accuracy of obtaining the graphic information is improved. Preferably, when the electrical signal is corrected according to the temperature signal, the following steps may be implemented: first, the correction coefficient a corresponding to the temperature signal is obtained, and then calculate ¥=& ¥ «, where V _iM is the output of the contact image sensor. The electrical signal is obtained to obtain the corrected electrical signal V. Wherein, different correction coefficients corresponding to different temperature signals may pre-store a mapping table corresponding to the temperature signal and the correction coefficient, and obtain a correction coefficient by looking up the table. Alternatively, the correction coefficient can also be obtained by the following calculation method: First, obtain the reference electrical signal V _3⁄4?s corresponding to the temperature signal, and then calculate &= ¥ «/ ¥ ^, where V ^ is the output of the contact image sensor at normal temperature. The electrical signal is obtained to obtain a correction coefficient a. For example: Set the electrical signal V _fi = V _p output at normal temperature, the reference electrical signal at -10 degrees is V _P _ _1Q , the reference electrical signal at 0 degrees is \>, and the reference electrical signal at 10 degrees is V _plQ , the reference electrical signal is 20 degrees _V p2Q, the reference electrical signal is 30 degrees _V p3Q, the reference electrical signal is 40 degrees _V p4Q, the reference electrical signal is 50 degrees V _p5 o, 60 degrees The reference electrical signal is V _p6 . , the correction coefficient a when calculating -10 degrees, 0 degrees, 10 degrees, 20 degrees, 30 degrees, 40 degrees, 50 degrees, 60 degrees, respectively

a ₂ Q=V _p2 o/V _p ,

V _p , save the correction coefficient at each temperature, when The electrical signal output by the contact image sensor is V _iM , and the output temperature is 40 degrees, then the corrected electrical signal V = a ₄₀ xV _S) is calculated, and the rest of the temperature is deduced by analogy. Further preferably, the method further comprises the steps of: determining, according to the temperature signal, whether the temperature inside and/or around the contact image sensor exceeds a preset temperature range, when the temperature inside and/or around the contact image sensor exceeds a preset temperature In the range, the contact image sensor is controlled to be powered off. With this preferred embodiment, it is possible to avoid distortion of the scanning result when the temperature is abnormal. From the above description, it can be seen that the present invention achieves the following technical effects: When the contact image sensor is working, the temperature of the contact image sensor and its surrounding environment is detected in real time, and the output electrical signal is corrected according to the temperature to ensure Accuracy of image processing; At the same time, when the contact image sensor and its surrounding environment exceed the rated temperature, it gives a warning, interrupts the work of the contact image sensor, or issues a waiting command. After the temperature returns to normal, it continues to work, ensuring contact. The security of the image sensor work. It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

The invention relates to a contact image sensor comprising a supporting frame (1), an optical lens (2) is arranged in the frame (1), and a light source (3) is arranged on a side of the optical lens (2). a transparent plate (4) is disposed above the optical lens (2), a circuit substrate (6) is disposed under the optical lens (2), and a photoelectric conversion chip is disposed on the circuit substrate (6) ) and the signal output component (7),

The contact image sensor further includes:

The temperature sensor (8), the signal collected by the temperature sensor (8) is output to the peripheral circuit through the signal output unit (7). The contact image sensor according to claim 1, characterized in that the temperature sensor (8) is provided on a frame at the light source (3) of the contact image sensor. The contact image sensor according to claim 1, characterized in that the temperature sensor (8) is provided on a wiring substrate (6) of the contact image sensor. A contact image sensor according to claim 1, wherein said temperature sensor (8) is provided on a rear surface of said wiring substrate (6). The contact image sensor according to claim 1, characterized in that the temperature sensor (8) is provided on a transparent plate (4) of the contact image sensor. The contact image sensor according to any one of claims 1 to 5, characterized in that the output signal of the temperature sensor (8) changes as the temperature changes. The contact image sensor according to any one of claims 1 to 5, wherein the temperature sensor (8) is a switching device, and the turning on and off of the switching device is controlled by a temperature change. The contact image sensor according to any one of claims 1 to 5, wherein the contact image sensor further comprises: an alarm device connected to the temperature sensor (8). A graphic processing system, comprising:

The contact image sensor according to any one of claims 1 to 8, for reading image information on an original, and outputting an electric signal corresponding to the graphic information and a temperature at which the graphic information is read Signal; And a graphic processing device connected to the contact image sensor for receiving the connected temperature signal and the electrical signal, and correcting the electrical signal according to the temperature signal.

10. A graphic processing method, comprising:

Reading the graphic information on the original by the contact image sensor, and outputting the electrical signal corresponding to the graphic information, wherein the contact image sensor is the contact image according to any one of claims 1 to 8. Sensor

When the contact image sensor reads the graphic information on the original, acquiring the temperature inside and/or around the contact image sensor to obtain a temperature signal;

Correcting an electrical signal output by the contact image sensor according to the temperature signal to obtain a corrected electrical signal;

Obtaining graphic and text information corresponding to the corrected electrical signal.

11. The graphics processing method according to claim 10, wherein the correcting the electrical signal output by the contact image sensor according to the temperature signal comprises:

Obtaining a correction coefficient a corresponding to the temperature signal;

The corrected electrical signal is calculated by the following formula: V = axV _Sj , where V _Sj is an electrical signal output by the contact image sensor.

12. The image processing method according to claim 11, wherein the obtaining the correction coefficient a corresponding to the temperature signal comprises:

Obtaining a reference electrical signal V corresponding to the temperature signal _;

The correction coefficient a is calculated by the following formula: a = V _3⁄4s / V _ffifi , where V ^ is an electrical signal outputted by the contact image sensor at normal temperature.

The image processing method according to claim 10, further comprising: determining, according to the temperature signal, whether a temperature inside and/or around the contact image sensor exceeds a preset temperature range;

The contact image sensor is controlled to be powered down when the temperature inside and/or around the contact image sensor exceeds the preset temperature range.