Preparation of flexible braided fabric display device for X-ray imaging

Abstract

According to preparation of the flexible braided fabric display device for X-ray imaging, multi-dimensional, large-area, movable, storable, simple-imaging and low-cost object internal ray imaging is realized. The device comprises a ray imaging fiber braided fabric, a luminous variable-frequency driver, a X ray emission source and a CCD (Charge Coupled Device) image recording instrument, the ray imaging fiber braided fabric is formed by weaving ray luminous fibers; the ray luminescent fiber comprises a central conductive wire electrode, a zinc oxide memory layer, a zinc sulfide luminescent layer, a transparent conductive layer and a protective layer; a light-emitting variable-frequency driver is connected with a ray light-emitting fiber electrode to emit light, and the ray light-emitting fiber memorizes an image generated by rays; the ray imaging fiber braided fabric covers an object, and a multi-angle grayscale image of the internal structure of the object irradiated by X rays is recorded by a CCD (Charge Coupled Device) image to form an unfolded digital image.

Description

Technical Field

[0001] The present invention belongs to the application field of X-ray imaging display technology. Technical Background

[0002] X-ray imaging technology and devices have been widely used in the fields of medical treatment, security inspection, industrial detection, etc. X-ray imaging technology mainly includes film imaging based on photographic film developing technology, red light reading technology based on barium fluorochloride image storage, amorphous silicon CMOS array photosensitive flat panel real-time imaging technology based on cesium iodide and GOS, etc. Their disadvantages are high price, limited area of the imaging flat panel, high splicing cost, inability to manufacture the ray-sensitive device into a flexible movable light-emitting image device, inability to read images over a large area, and even more inability to simply achieve internal imaging of large moving objects such as cars and large animals.

[0003] A flexible woven display device technology for X-ray imaging of the present invention realizes internal ray display imaging of an object with multi-dimensions, large area, movability, storability, simple imaging, and low cost. It includes a ray imaging fiber woven fabric, a light-emitting frequency converter driver, an X-ray emission source, and a CCD image recording instrument; the ray imaging fiber woven fabric is formed by weaving ray-emitting fibers; the ray-emitting fiber includes: a central conductive wire electrode, a zinc oxide memory layer, a zinc sulfide light-emitting layer, a transparent conductive layer, and a protective layer; the light-emitting frequency converter driver is used to connect the electrodes of the ray-emitting fibers to generate light, and the ray-emitting fibers can remember the images generated by the rays; the ray imaging fiber woven fabric is covered on the object, and after X-ray irradiation, the multi-angle gray-scale images of the internal structure of the object are recorded by an image recording instrument such as a mobile phone, and a digital image of an unfolded display can be formed.

[0004] A flexible woven display device for X-ray imaging of the present invention can be widely used in the fields of medical treatment, security inspection, industrial detection, etc. for the whole or partial detection of the interior of large wholes such as the human body and cars through extended knitting display imaging technologies such as double zinc oxide layer and material preparation, and carbon fiber electrode weaving. It can present patterns in multiple angles in real time and can also present stored images when laid flat. Summary of the Invention

[0005] The preparation of a flexible woven display device for X-ray imaging includes a ray imaging fiber woven fabric 8, a light-emitting frequency converter driver 10, an X-ray emission source 7, and a CCD image recorder 12; the ray imaging fiber woven fabric is formed by the cross-weaving of warp and weft of ray-emitting fibers; the structure of the ray-emitting fiber (attached Figure 1It includes: a central conductive wire electrode 1, a zinc oxide memory layer 2, a zinc sulfide light-emitting layer 3, a transparent conductive layer 4, and a protective layer 6. A light-emitting frequency converter is used to connect the central conductive wire electrode of the radiation-emitting fiber and the two electrodes of the transparent conductive layer. After being irradiated by X-rays, the radiation-emitting fiber can memorize the image generated by the intensity of the rays. The radiation imaging fiber fabric is covered on an object 9. After being irradiated from multiple angles by an X-ray source, when the unfolded imaging fiber fabric emits light under the control of the light-emitting frequency converter, the emitted light shows a multi-angle double-sided grayscale image 11 of the internal structure of the multi-object, and then it is formed into a digital storage image by a CCD imaging recorder (attached Figure 3 ).

[0006] The zinc oxide memory layer 2 in the present invention is formed by uniformly coating a mixture of zinc oxide powder material and an adhesive on the surface of the central conductive wire electrode, and the coating thickness is greater than 30 microns. The zinc oxide material is sintered at a high temperature of 600 - 1100 °C for 1 - 4 hours, and the sintering temperature is directly proportional to the particle size. The zinc oxide powder material with a particle size of 1 - 5 microns is formed after crushing, cleaning, and drying. The prepared zinc oxide powder material in the present invention is a photoconductive sensitive material. When the temperature is higher than the ambient temperature, the resistance value of zinc oxide increases. After being irradiated by X-rays, the resistance value changes and is fixed and stored. The intensity of X-ray irradiation is inversely proportional to the impedance value, resulting in the memory layer of the zinc oxide powder material having a storage function for the image after being irradiated by rays. The effect difference of the unsintered zinc oxide material is 5 - 9 times. Selecting an adhesive with strong polarity is beneficial to storage and light emission. The present invention effectively improves the imaging elements of grayscale by 10 orders of magnitude through a double-layer zinc oxide structure.

[0007] The zinc sulfide light-emitting layer 3 in the present invention is formed by uniformly coating a mixture of zinc sulfide copper light-emitting powder and an adhesive on the surface of the zinc oxide memory layer, and the coating thickness is 10 - 30 microns. The zinc sulfide copper light-emitting powder is formed by doping zinc sulfide with a copper ion activator and sintering at a high temperature of 900 - 1200 °C for 1 - 3 hours. It emits green light under an electric field. The impedance value of the zinc oxide memory layer is inversely proportional to the brightness of the zinc sulfide light-emitting layer. A high intensity of X-ray irradiation results in a small impedance of zinc oxide, and thus a high light-emitting intensity of the zinc sulfide copper light-emitting powder.

[0008] The central conductive wire electrode 1 in the present invention is composed of a continuous length of carbon fiber silk thread. The carbon fiber silk thread has good transmittance under rays. If a metal wire is used, a grid background will be generated in the ray display pattern, interfering with the inspection effect and results. A strand of wire with a diameter of 0.1 - 0.5 mm is composed of multiple carbon fiber silk threads. The continuous length of carbon fiber silk thread has good alternating current conductivity, and the carbon fiber silk thread has a conductive heating function, which is beneficial to the update and clarity of the display storage image.

[0009] The transparent conductive layer 4 in the present invention is a zinc oxide nano-conductive material. The present invention uses a special structure of two layers of zinc oxide, which can increase the gray scale and greatly improve the image clarity. The zinc oxide nano-conductive material can be sintered and then ground into a nano-conductive material, or directly use nano-conductive zinc oxide. Although it is not sintered, it can still change the resistance value under the irradiation of rays. Of course, it can also be one or a mixture of indium tin oxide nano-materials, nano-silver, and conductive polymers. After coating, it only has the function of transparent conductive light emission and cannot present a good gray scale effect. A continuous-length carbon fiber wire is placed outside the transparent conductive layer as a conductive lead 5. Using the carbon fiber wire as a conductive lead can significantly improve the conductive uniformity of the continuous length of the ray-emitting fiber and be used as an electrode lead.

[0010] The protective layer 6 in the present invention is a transparent material among PVC, PE, TPU, and silicone rubber. The thickness of the protective layer is 0.1 - 0.3 mm. The protective layer can improve the weaving stability and increase the service life. Of course, other transparent plastics or coatings can also be used as the protective layer.

[0011] The ray-emitting fiber in the present invention has a diameter of 0.3 - 2 mm. The central conductive wire electrode and the transparent conductive layer are respectively connected to the output of the light-emitting frequency converter driver, and electricity is applied to generate light. This electroluminescence does not use any metal electrode wires. Metal electrode wires will interfere with the image in χ-ray imaging, and the flexibility of the woven fabric is also better than that of metal wires. The ray-emitting fibers are woven into a dense and flexible ray imaging fiber woven fabric with three-dimensional wrapping or unfolding characteristics according to the warp and weft rules. Its density is proportional to the pattern clarity.

[0012] The light-emitting frequency converter driver in the present invention has an output voltage of 0 - 200V and an output frequency of 50 - 1000Hz. The special driver has an AC-DC heating conversion function, which is only effective for heating the carbon fiber. At the same time, the ray-emitting fibers are connected in series or parallel to the special light-emitting frequency converter driver, and electricity is applied to generate memory with gray-scale green light emission. It can repeatedly extract and delete the light-emitting image, and the image retention time is 3 - 24 hours. To eliminate the image, heat the carbon fiber to 40 - 60 degrees for 2 minutes by applying electricity.

[0013] The ray imaging fiber woven fabric in the present invention is formed by the dense weaving of one or more ray-emitting fiber warp and weft intersections (attached Figure 2 ). The ray imaging fiber woven fabric can wrap the target object or be used as a back display. After the χ-ray emission source moves and irradiates from multiple angles, the ray imaging fiber woven fabric remembers the internal structure of the target object. After the ray imaging fiber woven fabric is unfolded and electricity is applied to form an image and emit light to display the internal structure of the target object, it is then recorded with a camera. Description of the Drawings

[0014] Figure 1 Schematic diagram of the structure of the ray-emitting fiber Schematic diagram of the ray imaging fiber woven structure in Figure 2 Figure 3 Application schematic diagram In the figures of the present invention: 1 central conductive wire electrode, 2 zinc oxide memory layer, 3 zinc sulfide light-emitting layer, 4 transparent conductive layer, 5 conductive lead, 6 protective layer, 7 χ-ray emission source, 8 ray imaging fiber woven fabric, 9 object, 10 light-emitting frequency conversion driver, 11 object image, 12 CCD image recorder. Specific implementation method

[0015] A preparation technology for a flexible woven display device for χ-ray imaging, which includes a ray imaging fiber woven fabric 8, a light-emitting frequency conversion driver 10, a χ-ray emission source 7, and a CCD image recorder 12. The ray imaging fiber woven fabric is formed by the cross-weaving of ray-emitting fiber warp and weft. The ray imaging fiber woven fabric can cover an irregular target object or be used as the back imaging panel of the target object. The structure of the ray-emitting fiber (see attachment Figure 1 ) is in sequence: central conductive wire electrode 1, zinc oxide memory layer 2, zinc sulfide light-emitting layer 3, transparent conductive layer 4, protective layer 6. The light-emitting frequency conversion driver is used to connect the two electrodes of the central conductive wire electrode and the transparent conductive layer of the ray-emitting fiber. The ray-emitting fiber can remember the image generated by the intensity of the ray after being irradiated by χ-rays; when the ray imaging fiber woven fabric is covered on the object 9, after the χ-ray emission source irradiates from multiple angles, the unfolded imaging fiber woven fabric emits light under the control of the light-emitting frequency conversion driver. Its observation effect is obvious in a dark room or at night in the wild. The emitted light shows a multi-angle double-sided gray-scale image 11 of the internal structure of the multi-object, and then it is formed into a digital storage image by the CCD image recorder. The process is shown in attachment Figure 3 .

[0016] In the present invention, the zinc oxide memory layer 2 is formed by uniformly coating the surface of the central conductive wire electrode with a mixture of zinc oxide powder material and an adhesive. Adhesives with strong polarity are beneficial for storage and luminescence, such as silica gel, resin, fluorine coatings, etc., and can be applied by scraping, spraying and other processes. The coating thickness is greater than 30 microns. The zinc oxide material needs to be sintered at a high temperature of 600 - 1100 °C in air for 1 - 4 hours. Among them, sintering at 950 °C for 1 hour has a better effect. The sintering temperature, time and particle size are in a direct proportional relationship. After sintering, it is crushed, washed and dried to form zinc oxide powder material with a size of 1 - 5 microns. The zinc oxide powder material prepared in the present invention is a photoconductive sensitive material. When the temperature is higher than the ambient temperature, the resistance value of zinc oxide increases. Therefore, it needs to be heated before imaging or refreshing the image to increase the resistance value. After being irradiated with χ-rays of different intensities, the regional distribution of the resistance value changes and is fixed for storage. The intensity of χ-ray irradiation is inversely proportional to the resistance value, resulting in the image of the zinc oxide powder material also having a storage function after being irradiated with rays. The effect difference of the unsintered zinc oxide material is 5 - 9 times. The intensity of χ-ray irradiation is inversely proportional to the impedance value, the impedance value of the zinc oxide memory layer is inversely proportional to the brightness of the zinc sulfide luminescent layer 3, and the intensity of χ-ray irradiation is directly proportional to the brightness of the zinc sulfide luminescent layer 3. The zinc sulfide luminescent layer 3 in the present invention is formed by uniformly coating the surface of the zinc oxide memory layer with a mixture of zinc sulfide copper luminescent powder and an adhesive. The spraying or coating thickness is 10 - 30 microns. The zinc sulfide copper luminescent powder is formed by doping zinc sulfide with a copper ion activator and sintering at a high temperature of 900 - 1200 °C for 1 - 3 hours. It emits green light under an electric field, which is beneficial for the sensitive reception of the mobile phone camera. The zinc oxide has a small resistance and the zinc sulfide copper has a high luminescence intensity. The luminescence intensity generated under an electric field is usually 0 - 50 Cd / m 2 . In the present invention, no insulating layer structure needs to be designed for electroluminescence. The insulating layer will greatly reduce the gray level and the contrast of the ray pattern display.

[0017] The central conductive wire electrode 1 in the present invention is composed of a continuous length of carbon fiber filaments. The carbon fiber filaments have good transmittance under rays. Using metal wires will generate a grid background in the ray display pattern, interfering with the inspection results. A bundle of carbon fiber filaments with a diameter of 0.1 - 0.5 mm is formed; the continuous length of carbon fiber filaments has good alternating current conductivity, and the carbon fiber filaments have a conductive heating function with a heating temperature less than 60 °C, which is beneficial for updating and clarifying the display of stored images. Heating the carbon fiber filaments can eliminate the previous image, which is a necessary structure for rapid repeated imaging. The carbon fiber filaments are relatively soft, which is also beneficial for large-area weaving and use.

[0018] The transparent conductive layer 4 in the present invention is coated with a zinc oxide nano-conductive material. The zinc oxide nano-conductive material can be sintered and then ground into a nano-conductive material, or directly use nano-conductive zinc oxide. Although it is not sintered, it can still change the resistance value under the irradiation of rays. Two layers of zinc oxide layers can increase the gray level by more than 10 levels, and the clarity can be doubled. Of course, it can also be one or a mixture of indium tin oxide nano-materials and conductive polymers, which has a transparent conductive effect after coating; a continuous length of carbon fiber wire is placed outside the transparent conductive layer as a conductive lead 5. Using carbon fiber wire as a conductive lead can significantly improve the conductive uniformity of the continuous length of the ray-emitting fiber and be used as an electrode lead.

[0019] The protective layer 6 in the present invention is a transparent plastic among PVC, PE, and TPU. The thickness of the protective layer is 0.1 - 0.3 mm. The protective layer can improve the weaving stability and increase the service life. Of course, other transparent plastics or coatings can also be used as the protective layer.

[0020] The ray-emitting fiber in the present invention preferably has a diameter of 0.3 - 1 mm. The central conductive wire electrode and the transparent conductive layer are respectively connected to the output of the light-emitting frequency converter driver, and electricity is applied to generate light. This electroluminescence does not use any metal electrode wire. Metal electrode wires will produce interference images in χ-ray imaging, and the flexibility of the woven fabric is also better than that of metal wires. The carbon fiber selected in the present invention has conductivity, heat generation, and transparency under rays, which has a particularly advantageous effect. The ray-emitting fibers are woven into a dense and flexible ray imaging fiber woven fabric with three-dimensional wrapping or unfolding characteristics according to the warp and weft rules, and its density is proportional to the pattern clarity.

[0021] The light-emitting frequency converter driver in the present invention has an output voltage of 0 - 200V and an output frequency of 50 - 1000Hz. The input can be DC or AC. For example, DC12V is suitable for carrying. In particular, the driver has an AC-DC heating conversion function, which is only effective for heating carbon fiber. At the same time, the ray-emitting fibers are connected in series or parallel to the dedicated light-emitting frequency converter driver, and electricity is applied to generate memory with gray-scale green light emission. It can repeatedly extract the light-emitting image many times, and the image retention time is 3 - 24 hours. To eliminate the image, heat the carbon fiber to 40 - 60 degrees by applying electricity. When the unfolded area of the ray imaging fiber woven fabric in the present invention is 10 square meters, the CCD image recorder can record the image at a distance of 3 meters, and the KPT1000 model driver can be used. When the unfolded area of the ray imaging fiber woven fabric is 100 square meters, the CCD image recorder can record the image at a distance of 7 meters, and the KPT6000 model driver can be used. Of course, the ray imaging fiber woven fabric can also perform multi-object multi-angle double-sided imaging without unfolding.

[0022] The ray imaging fiber woven fabric in the present invention is formed by the dense weaving of one or more ray-emitting fiber warp and weft intersections (attached Figure 2), the ray imaging fiber fabric can wrap the target object or be used as a back display. After the X-ray emission source moves and irradiates from multiple angles, the ray imaging fiber fabric memorizes the internal structure of the target object. After the X-ray emission source stops irradiating, it is powered on to emit light and display the internal image of the object, which can be directly observed repeatedly on-site. Or the ray imaging fiber fabric can be moved and unfolded, then powered on to image and emit light to display the internal structure of the target object, and be recorded by a mobile phone or camera in a dark environment, enabling personnel to stay away from the radiation hazard, and it is suitable for detecting large immovable objects in the wild or indoors. The advantages of the present invention are

[0023] A flexible woven display device for X-ray imaging of the present invention directly displays patterns using powder electroluminescent technology. Two layers of zinc oxide structure are used to improve the contrast and clarity. Using carbon fiber as the conductive electrode avoids the appearance of radiation interference images of metal electrodes.

[0024] A flexible woven display device for X-ray imaging of the present invention enables the X-ray imaging display to transform into a textile fabric, which can cover and be worn on the surface of an object. By moving the X-ray source, three-dimensional imaging from multiple angles can be achieved, and it is suitable for detecting extremely large immovable objects or large uncontrolled living animals.

[0025] A flexible woven display device for X-ray imaging of the present invention does not use expensive, precise, and non-bendable amorphous silicon and CMOS array photosensitive flat panel real-time imaging technology. Instead, it directly uses a lightweight, thin, flexible, foldable, inexpensive, and simple manufacturing process woven electroluminescent display device, which is suitable for direct and rapid memory imaging in the wild and indoors, and is environmentally friendly and safe.

[0026] After the above description of the preferred embodiments of the present invention, it should be understood by those skilled in the art that any changes and improvements made to the present invention without departing from the spirit and scope of the present invention are within the scope of the present invention.

Claims

1. A preparation of a flexible woven fabric display device for x-ray imaging, comprising a woven fabric for x-ray imaging fibers, a luminescent frequency conversion driver, an x-ray emission source, and a CCD image recorder; the woven fabric for x-ray imaging fibers is formed by weaving luminescent fibers; the luminescent fibers comprise: a central conductive wire electrode, a zinc oxide memory layer, a zinc sulfide luminescent layer, a transparent conductive layer, and a protective layer, and the luminescent fibers memorize images generated by x-ray irradiation; a luminescent frequency conversion driver is used to connect the central conductive wire electrode and the transparent conductive layer of the luminescent fibers, and the luminescent fibers can memorize images generated by the intensity of the x-rays after x-ray irradiation; the woven fabric for x-ray imaging fibers is covered on an object, and after the x-ray emission source irradiates at multiple angles, the unfolded woven fabric for x-ray imaging generates light under the control of the luminescent frequency conversion driver, and the light displays a multi-angle double-sided grayscale image of the internal structure of multiple objects, which is then formed into a digital storage image by the CCD image recorder.

2. The preparation of a flexible woven fabric display device for X-ray imaging as described in claim 1, wherein the zinc oxide memory layer is formed by mixing zinc oxide powder material with an adhesive and uniformly coating the mixture on the surface of the central conductive wire electrode, with a coating thickness greater than 30 microns; the zinc oxide material is sintered at a high temperature of 600-1100 degrees for 1-4 hours, crushed, cleaned, and dried to form a zinc oxide powder material of 1-5 microns.

3. The preparation of a flexible woven fabric display device for X-ray imaging as described in claim 1, wherein the zinc sulfide luminescent layer is formed by mixing zinc sulfide copper luminescent powder with an adhesive and uniformly coating it on the surface of the zinc oxide memory layer, with a coating thickness of 10-30 microns; the zinc sulfide copper luminescent powder is formed by sintering zinc sulfide doped with a copper ion activator at a high temperature of 900-1200 degrees for 1-3 hours, and produces green luminescence under an electric field.

4. The preparation of a flexible woven fabric display device for X-ray imaging as described in claim 1, wherein the central conductive wire electrode is composed of a continuous length of carbon fiber wire with a diameter of 0.1-0.5 mm; the continuous length of carbon fiber wire has good AC conductivity, and the carbon fiber wire has a conductive heating function.

5. The preparation of a flexible woven fabric display device for X-ray imaging as described in claim 1, wherein the transparent conductive layer is a zinc oxide nano-conductive material, which has a transparent conductive effect after coating; a continuous length of carbon fiber thread is placed outside the transparent conductive layer as a conductive lead.

6. The preparation of a flexible woven fabric display device for X-ray imaging as described in claim 1, wherein the protective layer is a transparent material selected from PVC, PE, and TPU, and the thickness of the protective layer is 0.1-0.3 mm.

7. A flexible woven fabric display device for X-ray imaging as described in claim 1, wherein the diameter of the ray-emitting fiber is 0.3-2 mm, the central conductive wire electrode and the transparent conductive layer are respectively connected to the luminous frequency conversion driver, and light is generated when powered on; the ray-emitting fiber is woven according to the warp and weft rules into a dense and flexible ray imaging fiber braid with three-dimensional wrapping or unfolding characteristics.

8. Preparation of a flexible woven fabric device for X-ray imaging as described in claim 1, the luminous frequency conversion driver has the functions of output voltage 0-130V and output frequency 1000Hz, and is equipped with AC and DC carbon fiber heating functions. The luminous fiber is connected in series or in parallel with a special luminous frequency conversion driver, and generates grayscale luminescence when powered on.

9. Preparation of a flexible woven fabric device for X-ray imaging as described in claim 1, wherein the X-ray imaging fiber braid is formed by densely weaving one or more warp and weft threads of the X-ray emitting fibers, and the X-ray imaging fiber braid wraps the target object. After the X-ray emission source moves and irradiates at multiple angles, the X-ray imaging fiber braid memorizes the internal structure of the target object, and the X-ray imaging fiber braid is energized to form an image and emit light to display the multi-angle and multi-faceted structure inside the target object.

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