CN-121994829-A - X-ray detector structure with variable curvature

CN121994829ACN 121994829 ACN121994829 ACN 121994829ACN-121994829-A

Abstract

The invention provides an X-ray detector structure with variable curvature, which comprises a flexible X-ray detection panel with two flexible surfaces, a rigid limiting block group arranged on the flexible surfaces and an elastic stretchable compression layer filled and wrapped with the rigid limiting block and the flexible X-ray detection panel. The flexible X-ray detection panel is adopted to replace a complex external supporting structure to realize the X-ray detector with variable curvature, and the portability and the application efficiency of the detector are improved while the curvature is variable; the flexible X-ray detection panels with the other two flexible surfaces realize double-sided bending, improve the detection efficiency in dense pipelines and narrow space scenes, and finally, the elastic stretchable compression layer avoids the stretching limit bending of the flexible panel or surface wrinkles from influencing imaging and improves the imaging effect of the X-ray detector.

Inventors

CHENG LIPENG
Song Chenjia
PAN HAIDONG
HUANG YIMIN
LIU SHENGSONG

Assignees

奕瑞电子科技集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20251223

Claims (10)

1. The X-ray detector structure with the variable curvature is characterized by comprising a flexible X-ray detection panel, a rigid limiting block group and an elastic stretchable compression layer; The flexible X-ray detection panel comprises two opposite flexible surfaces capable of detecting X-rays, wherein a rigid limiting block group is arranged at the edge of each flexible surface, each rigid limiting block group comprises more than two rigid limiting blocks which are arranged at the edge of the flexible X-ray detection panel along the flexible direction of the flexible X-ray detection panel, a preset distance is reserved between every two adjacent rigid limiting blocks so as to limit the minimum bending radius of the flexible X-ray detection panel, and one surface of each rigid limiting block is fixedly connected with the corresponding flexible surface edge of the flexible X-ray detection panel; The elastic stretchable compression layer is filled in the gap between the rigid limiting blocks and wraps the exposed surfaces of the rigid limiting blocks and the flexible X-ray detection panel.
2. The variable curvature X-ray detector structure of claim 1, wherein the flexible X-ray detection panel comprises an X-ray conversion layer, a photoelectric conversion layer and a mechanical support layer, the mechanical support layer comprises two opposite support surfaces, the photoelectric conversion layer covers the two support surfaces, the X-ray conversion layer covers the surface of the photoelectric conversion layer, and one surface of each rigid limiting block is fixedly connected with the surface edge of the corresponding mechanical support layer of the flexible X-ray detection panel.
3. The variable curvature X-ray detector structure of claim 2, wherein the X-ray conversion layer is a flexible scintillator or quantum dot scintillation film for converting detected X-rays into visible light.
4. The structure of claim 2, wherein the photoelectric conversion layer comprises a flexible substrate, a photodiode and a thin film transistor switch array, the flexible substrate is fixedly connected with the mechanical support layer, the photodiode and the thin film transistor switch array are prepared on the flexible substrate, the photodiode is used for converting visible light converted by the X-ray conversion layer into electric charges and storing the electric charges, and the thin film transistor switch array is used for converting the electric charges stored by the photodiode into pixel-level electric signals.
5. The variable curvature X-ray detector structure of claim 4, wherein the flexible substrate is at least one of PI, PEN, or PET.
6. The variable curvature X-ray detector structure of claim 2, wherein the mechanical support layer is carbon fiber, polymer film, ultra-thin glass or metal foil.
7. The variable curvature X-ray detector structure of claim 1, wherein the flexible X-ray detection panel comprises an X-ray direct conversion semiconductor and a mechanical support layer, the mechanical support layer comprising two opposing support surfaces, the X-ray direct conversion semiconductor overlying both of the support surfaces.
8. The structure of claim 1, wherein the two flexible surfaces of the flexible X-ray detection panel are fixedly connected with the corresponding rigid limiting block set by gluing, or the two flexible surfaces of the flexible X-ray detection panel and the corresponding rigid limiting block set are integrally formed by a compounding process.
9. The variable curvature X-ray detector structure of claim 1, wherein the material of each of the rigid stoppers is metal.
10. The variable curvature X-ray detector structure of claim 1, wherein the elastically stretchable compression layer is at least one of TPEE, metal-polymeric elastic conductor, gel-like material, carbon spring, EPDM, silicone rubber, nitrile rubber, or elastomeric 3D printing resin.

Description

X-ray detector structure with variable curvature Technical Field The invention belongs to the technical field of X-ray detection, and particularly relates to an X-ray detector structure with variable curvature. Background An adjustable curvature detector (VCD) is a sensor array that can dynamically change its curvature during use to accommodate different imaging or detection requirements. VCDs are widely used in aviation, aerospace, medical imaging, robotic vision, and portable imaging devices. Conventional VCDs are classified into mechanical hinge type (MECHANICALLY-HINGED VCD, MH-VCD) and Fully Flexible type (FF-VCD). Mechanical hinged adjustable curvature detector (MH-VCD) must rely on complex hinges (Hinge) and external support structures (External Support Structure, ESS) to ensure variable curvature. These ESS are typically composed of Multi-Joint hinges (MJH), slide rails (SLIDE RAIL, SR) and locking mechanisms (Locking Mechanism, LM). Because MJH and SR need precision numerical control machining (CNC MACHINING) and Ultra-precision assembly (Ultra-Precision Assembly, UPA), the machining cost of the mechanical hinge type adjustable curvature detector is high, and because of the large number of parts of the ESS and the long assembly chain, the assembly cost is high because of the need of multiple debugging, and because of the problems of Wear (weather) and fatigue (Fatigue) of MJH, the maintenance requirement is high because of the need of periodic Lubrication (Lubrication) and replacement, in addition, the integral weight of the mechanical hinge type adjustable curvature detector is usually more than 2kg, the structure is complex, the size is large, the weight is heavy, and the portable requirement cannot be met, and meanwhile, the mechanical hinge type adjustable curvature detector is generally only bent on one side, the curvature adjusting direction is limited, and the practical application efficiency is low. The Fully Flexible adjustable curvature detector (FF-VCD) adopts a Fully Flexible Panel (FFP), and curvature change is realized through elasticity of a material without a hinge. However, FFP suffers from the difficulty of precise control of the minimum bend radius (Minimum Bending Radius, MBR) during repeated bending. When the MBR is too small, problems such as stress concentration, fatigue fracture of metal wiring, stripping of active devices and the like in the flexible substrate can be caused, so that the bending life (Bending Life, BL) of the FFP is obviously shortened, and the reliability of the VCD is reduced. Therefore, a novel curvature-adjustable detector structure is needed, which can not only get rid of the high processing and assembling cost and maintenance burden brought by the complex hinge and the external supporting structure, but also accurately control the minimum bending radius, prolong the service life of the product, realize double-sided bending and light weight, thereby improving the practical application efficiency and reliability. It should be noted that the foregoing description of the background art is only for the purpose of providing a clear and complete description of the technical solutions of the present application and is thus convenient for a person skilled in the art to understand, and it should not be construed that the above technical solutions are known to the person skilled in the art merely because these solutions are described in the background art section of the present application. Disclosure of Invention In view of the above drawbacks of the prior art, an object of the present invention is to provide a curvature-variable X-ray detector structure, which is used for solving the problems of low practical application efficiency and poor reliability of the curvature-adjustable X-ray detector in the prior art. In order to achieve the above object, the present invention provides an X-ray detector structure with variable curvature, which comprises a flexible X-ray detection panel, a rigid limiting block group and an elastic stretchable compression layer; The flexible X-ray detection panel comprises two opposite flexible surfaces capable of detecting X-rays, wherein a rigid limiting block group is arranged at the edge of each flexible surface, each rigid limiting block group comprises more than two rigid limiting blocks which are arranged at the edge of the flexible X-ray detection panel along the flexible direction of the flexible X-ray detection panel, a preset distance is reserved between every two adjacent rigid limiting blocks so as to limit the minimum bending radius of the flexible X-ray detection panel, and one surface of each rigid limiting block is fixedly connected with the corresponding flexible surface edge of the flexible X-ray detection panel; The elastic stretchable compression layer is filled in the gap between the rigid limiting blocks and wraps the exposed surfaces of the rigid limiting blocks and the flexible X-ray detection panel. The flexib