High-degree-of-freedom flexible wire connection structure for DMD spatial light modulator

Abstract

A high-degree-of-freedom flexible wire connection structure for a DMD spatial light modulator comprises a flexible wire conductor, and a first wiring plug and a second wiring plug are fixedly installed at the two ends of the flexible wire conductor respectively. The flexible wire conductor comprises a plurality of strands of high-toughness wire core conductors and an insulating coating layer, the plurality of strands of wire core conductors are arranged side by side in parallel to form a long-strip-shaped wire body structure, and the insulating coating layer coats the outer surface of the long-strip-shaped wire body; and the first wiring plug and the second wiring plug are fixedly inserted into the slot of the DMD display daughter card and the slot of the DMD control driving main card respectively. According to the utility model, the defects in the prior art are overcome, and free bending in a multi-dimensional space can be realized. And the requirements of high-performance equipment are met.

Description

Technical Field

[0001] This utility model relates to the field of optical equipment technology, specifically to a high degree of freedom flexible wire connection structure for DMD spatial light modulators. Background Technology

[0002] Digital micromirror devices (DMDs) are spatial light modulators with millions of high-speed, independently operating micromirror units. The main components of this device include a DMD display daughter card and a DMD control driver master card. It has unique advantages in terms of light modulation speed, precision, and efficiency, and is widely used in high-resolution projection displays, digital lithography, rotating 3D displays, 3D printing, light field manipulation, stereo vision, computational imaging, machine vision, high frame rate detection systems, dynamic scene simulators, and other fields.

[0003] A Digital Micromirror Device (DMD) is primarily composed of a DMD display daughter card and a DMD control driver master card. The DMD display daughter card and the DMD control driver master card are connected to achieve functions such as data transmission, control signal transmission, and power supply. These connections collectively ensure the normal operation of the DMD system, guaranteeing correct image display and precise micromirror control; however, the specific connection methods may vary depending on the application.

[0004] Currently, the connection methods between the DMD display daughter card and the DMD control driver master card are divided into PCB connection and flexible cable connection. PCB connection is usually fixed, using soldering or a socket and plug connection. This method is suitable for systems with compact structures and high stability requirements. However, the position between the DMD display daughter card and the DMD control driver master card cannot be adjusted, and even slight vibrations in the system are directly transmitted to the DMD display daughter card, leading to a decrease in the stability and accuracy of the entire optical system. Flexible cable connection is a common and convenient connection method, suitable for scenarios where the relative position between the DMD display daughter card and the DMD control driver master card needs to be adjusted or for connecting devices in confined spaces. However, flexible cables can only be bent and folded within a limited range. With increased use, repeated bending of the cable may damage the internal conductors or insulation layer. Furthermore, due to the limited bending radius, excessive bending can directly lead to breakage. Therefore, while the flexible cable solution can adjust the relative position between the DMD display daughter card and the DMD control driver master card to some extent and mitigate the impact of system vibration on the DMD display daughter card, its shortcomings in mechanical fatigue, bending limitations, and lifespan remain. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a high-degree-of-freedom flexible wire connection structure for DMD spatial light modulators. This structure overcomes the limitations of existing technologies, features a rational design, and allows for free bending within multi-dimensional space, thus meeting the requirements of high-performance equipment.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A high degree of freedom flexible wire connection structure for a DMD spatial light modulator includes a flexible wire conductor, with a first connector and a second connector fixedly installed at both ends of the flexible wire conductor, respectively.

[0008] The flexible conductor includes multiple high-toughness core conductors and an insulating coating layer. The multiple core conductors are arranged side by side in parallel to form an elongated conductor structure. The insulating coating layer covers the outer surface of the elongated conductor. The first connector and the second connector are respectively fixedly inserted into the slot of the DMD display daughter card and the slot of the DMD control drive master card.

[0009] Preferably, each of the bases of the first and second connectors is rotatably connected to a fixed cover plate. A buckle is provided at the end of the fixed cover plate away from the base. Snap-fit ​​protrusions are provided on the outer side of the slot of the DMD display sub-card and the outer side of the slot of the DMD control drive master card. The buckle engages with the snap-fit ​​protrusions.

[0010] Preferably, each of the conductor cores is a coaxial structure, each of the conductor cores includes a copper core wire, the outer surface of the copper core wire is wrapped with an insulating dielectric layer, the outer surface of the insulating dielectric layer is wrapped with a shielding layer, and the outer surface of the shielding layer is wrapped with a sheath.

[0011] Preferably, the flexible conductor is provided in multiple sets, and the two ends of each set of flexible conductors are respectively connected to the slot of the DMD display daughter card and the slot of the DMD control drive master card through a first connector and a second connector.

[0012] Preferably, the lengths of the flexible conductors in each group are equal.

[0013] This invention provides a high-degree-of-freedom flexible wire connection structure for DMD spatial light modulators. It offers the following advantages: by employing multiple high-toughness conductor cores arranged side-by-side and then covered with an insulating layer to form a highly flexible elongated conductor structure, the entire flexible conductor can freely twist and bend in multi-dimensional space. This allows the entire flexible wire connection structure to adapt to the requirements of optical experiments requiring dynamic adjustment and complex wiring. Furthermore, it ensures that the entire flexible wire connection structure can adapt to various installation methods such as side mounting, face-to-face mounting, back mounting, top mounting, and vertical mounting, while effectively guaranteeing the service life of the flexible conductor after frequent deformation. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in this utility model or the prior art, the accompanying drawings used in the description of the prior art will be briefly introduced below.

[0015] Figure 1 A schematic diagram of the structure of this utility model;

[0016] Figure 2 A schematic diagram of the installation structure of this utility model;

[0017] Figure 3 A schematic diagram of the structure of the fixed cover plate in this utility model;

[0018] Figure 4 A schematic diagram of the cross-sectional structure of the flexible conductor in this utility model;

[0019] Figure 5 A schematic diagram of the structure of this utility model when mounted on the side;

[0020] Figure 6 This utility model is shown in the structural diagram when installed face-to-face.

[0021] Figure 7 The above is a schematic diagram of the structure during installation of this utility model;

[0022] Figure 8 A schematic diagram of the structure of this utility model when mounted on the back;

[0023] Figure 9 A schematic diagram of the structure of this utility model when installed vertically;

[0024] Figure 10 A schematic diagram of the existing PCB hard connection method;

[0025] Figure 11 A schematic diagram of a structure using flexible cable connections in the prior art;

[0026] Figure 12 A schematic diagram of the connection structure of this utility model;

[0027] Explanation of the labels in the diagram:

[0028] 1. Flexible conductor; 2. First connector; 3. Second connector; 4. DMD display daughter card; 5. DMD control drive master card; 6. Fixing cover; 7. Buckle; 11. Core conductor; 12. Insulation coating layer. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0030] Example 1, as Figure 1-12 As shown, a high degree of freedom flexible wire connection structure for a DMD spatial light modulator includes a flexible wire conductor 1, with a first connector 2 and a second connector 3 fixedly installed at both ends of the flexible wire conductor 1.

[0031] The flexible conductor 1 includes multiple high-toughness core conductors 11 and an insulating coating layer 12. The multiple core conductors 11 are arranged side by side in parallel to form a long strip conductor structure. The insulating coating layer 12 covers the outer surface of the long strip conductor. The first connector 2 and the second connector 3 are respectively fixedly inserted into the slot of the DMD display daughter card 4 and the slot of the DMD control drive master card 5.

[0032] Working principle:

[0033] When in use, the first connector 2 and the second connector 3 at both ends of the flexible conductor 1 can be directly inserted into the slots of the DMD display sub-card 4 and the DMD control drive master card 5 respectively by plugging them in.

[0034] In this invention, the flexible conductor 1 is constructed by arranging multiple high-toughness core conductors 11 side-by-side and then covering them with an insulating layer 12 to form a highly flexible elongated conductor structure. This allows the entire flexible conductor 1 to be freely bent in multi-dimensional space, enabling the entire flexible wire connection structure to adapt to the requirements of optical experiments requiring dynamic adjustment and complex wiring. Furthermore, it ensures that the entire flexible wire connection structure can accommodate various installation methods, such as side mounting, face-to-face mounting, back mounting, top mounting, and vertical mounting. Specifically, as shown... Figures 4 to 8 As shown, this effectively ensures the service life of the flexible conductor 1 after frequent deformation.

[0035] In addition, because the DMD generates a significant amount of heat during use, current DMD control driver main cards (5) are equipped with cooling fans. While traditional PCB hard-connection methods offer high mechanical strength and signal transmission efficiency, the rigid structure cannot absorb or isolate the mechanical vibrations of the cooling fan, causing these vibrations to be directly transmitted to the DMD display daughter card (4). Figure 9 As shown, this mechanical vibration transmission causes a slight shift in the DMD micromirror array, which in turn significantly affects optical modulation accuracy and image stability. Traditional flexible cables, due to their flexibility, can partially mitigate the vibration transmission problem; however, the vibration resistance of flexible cables is limited, such as... Figure 10 As shown, under high-frequency vibration or long-term operation, the vibration attenuation effect of flexible cables cannot fully meet the requirements of high-precision DMD systems, and will still have a certain impact on the optical modulation accuracy and image stability of the DMD. Therefore, in this invention, by designing the flexible conductor 1 as a high-toughness long strip conductor structure, the vibration can be fully dispersed and attenuated based on the high flexibility of its multi-strand conductor 11 and appropriate folding and bending, thereby effectively avoiding the impact of the mechanical vibration of the cooling fan on the optical display of the DMD display daughter card 4.

[0036] In Example 2, as a further preferred embodiment of Example 1, a fixed cover plate 6 is rotatably connected to the base of the first connector 2 and the second connector 3. Specifically, a rotating shaft is provided on the inner side of one end of the fixed cover plate 6, and rotating shaft holes are provided on both sides of the base of the first connector 2 and the base of the second connector 3, so that one end of the fixed cover plate 6 is rotatably connected to the rotating shaft hole through the rotating shaft. A buckle 7 is provided on the end of the fixed cover plate 6 away from the base. A snap-fit ​​protrusion is provided on the outer side of the slot of the DMD display sub-card 4 and the outer side of the slot of the DMD control drive main card 5. The buckle 7 engages with the snap-fit ​​protrusion.

[0037] Therefore, after inserting the first connector 2 and the second connector 3 into the slots of the DMD display daughter card 4 and the DMD control drive master card 5, respectively, the fixing covers 6 on the first connector 2 and the second connector 3 can be rotated toward the slots of the DMD display daughter card 4 and the DMD control drive master card 5, respectively. This allows the fixing covers 6 to cover the outside of the slots of the DMD display daughter card 4 and the DMD control drive master card 5, respectively. The latches 7 on the fixing covers 6 then engage with the latching protrusions on the outside of the slots, thus securing the fixing covers 6. This effectively prevents the first connector 2 and the second connector 3 from becoming loose, further improving the stability of the connection between the two ends of the flexible conductor 1 and the DMD display daughter card 4 and the DMD control drive master card 5.

[0038] In Example 3, as a further preferred embodiment of Example 1, each conductor 11 is a coaxial structure, and each conductor 11 includes a copper core wire. The outer surface of the copper core wire is wrapped with an insulating dielectric layer, the outer surface of the insulating dielectric layer is wrapped with a shielding layer, and the outer surface of the shielding layer is wrapped with a sheath. Specifically, the copper core wire is bare copper wire, tinned copper wire, or silver-plated copper wire. The insulating dielectric layer can be made of PTFE material, the shielding layer is made of tinned copper wire wrapped around the outer surface of the insulating dielectric layer by braiding and winding, and the sheath is made of PVC material. The insulating dielectric layer effectively ensures the safety of the copper core wire, and the shielding layer effectively shields the electromagnetic fields generated by the current.

[0039] In Example 4, as a further preferred embodiment of Example 1, multiple sets of flexible conductors 1 are provided. The two ends of each set of flexible conductors 1 are connected to the slots of the DMD display daughter card 4 and the DMD control drive master card 5 through the first wiring plug 2 and the second wiring plug 3, respectively.

[0040] Specifically, the number of flexible conductors 1 can be flexibly adjusted according to the number of pins between the DMD display daughter card 4 and the drive control master card 5 and the signal transmission requirements. For example, when the number of signals is small or the wiring space is limited, a smaller number of flexible conductors 1 with multiple core conductors 11 can be set to effectively reduce the overall number of flexible conductors 1 and save wiring space. When a large number of signals need to be transmitted, multiple flexible conductors 1 can be set to distribute the signals on different flexible conductors 1 for transmission, thereby effectively reducing the wiring complexity of a single flexible conductor 1.

[0041] In addition, the arrangement of multiple flexible conductors 1 can be flexibly adjusted according to the actual spatial layout. For example, flexible conductors 1 can be arranged between different PCB modules, which can effectively avoid cross interference and optimize the overall system structure.

[0042] Example 5, as a further preferred embodiment of Example 4, for the DMD control system requiring a high-speed signal transmission system, the lengths of each group of flexible conductors 1 must be kept consistent. This effectively avoids problems caused by signal delay, impedance mismatch, reflection, and time delay distortion.

[0043] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-degree-of-freedom flexible wire connection structure for a DMD spatial light modulator, characterized in that: Includes a flexible conductor (1), and a first connector (2) and a second connector (3) are fixedly installed at both ends of the flexible conductor (1); The flexible conductor (1) includes multiple strands of high-toughness conductor cores (11) and an insulating covering layer (12). The multiple strands of conductor cores (11) are arranged side by side in parallel to form a long strip conductor structure. The insulating covering layer (12) covers the outer surface of the long strip conductor. The first connector (2) and the second connector (3) are respectively fixedly inserted into the slots of the DMD display sub-card (4) and the DMD control drive master card (5).

2. The high-degree-of-freedom flexible wire connection structure for a DMD spatial light modulator according to claim 1, characterized in that: The bases of the first connector (2) and the second connector (3) are each rotatably connected to a fixed cover plate (6). A buckle (7) is provided at the end of the fixed cover plate (6) away from the base. A snap-fit ​​protrusion is provided on the outside of the slot of the DMD display sub-card (4) and the outside of the slot of the DMD control drive main card (5). The buckle (7) engages with the snap-fit ​​protrusion.

3. The high-degree-of-freedom flexible wire connection structure for a DMD spatial light modulator according to claim 1, characterized in that: Each of the conductors (11) is a coaxial structure, each of the conductors (11) includes a copper core wire, the outer surface of the copper core wire is wrapped with an insulating dielectric layer, the outer surface of the insulating dielectric layer is wrapped with a shielding layer, and the outer surface of the shielding layer is wrapped with a sheath.

4. The high-degree-of-freedom flexible wire connection structure for a DMD spatial light modulator according to claim 1, characterized in that: The flexible conductor (1) is provided in multiple sets. The two ends of each set of flexible conductor (1) are connected to the slots of the DMD display sub-card (4) and the DMD control drive master card (5) through the first wiring plug (2) and the second wiring plug (3).

5. A high-degree-of-freedom flexible wire connection structure for a DMD spatial light modulator according to claim 4, characterized in that: The lengths of the flexible conductors (1) in each group are equal.

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