Control system of digital micromirror equipment

Abstract

The embodiment of the utility model discloses a control system of a digital micromirror device, the control system comprises a data sending end, a data receiving end and a control end, the data sending end comprises a computer, an SDR base station and a first wireless transceiver, the SDR base station is respectively connected with the computer and the first wireless transceiver; the data receiving end comprises a second wireless transceiver, an SDR module and a DMD control module, the SDR module is respectively connected with the second wireless transceiver and the DMD control module, and the first wireless transceiver is connected with the second wireless transceiver; the control end comprises a digital micro-mirror device, and the digital micro-mirror device is connected with the data receiving end. According to the technical scheme, based on the characteristic that the frequency can be customized through the SDR technology, wireless control data transmission of the digital micromirror equipment is achieved, and flexibility and safety are high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the control system of digital micromirror equipment belongs to equipment control technical field. BACKGROUND

[0002] With the development of technology, the exposure data update of LDI (Laser Direct Imaging) equipment gradually changes from wired transmission mode to wireless transmission mode. In wireless transmission, part of the control data update of DMD (Digital Micromirror Device) is carried out using local area network, and part of the control data update of DMD is carried out using 3G or 4G (such as TD-LTE) technology.

[0003] However, the geographical receiving range of the local area network is limited, and the transmission spectrum and the receiving spectrum are determined by hardware, so the risk of interception of the control data is relatively large; 3G or 4G technology usually contains a large number of subsystems, and any subsystem being interfered with will cause the entire base station to be unable to work, so the security and privacy are poor. INVENTION CONTENTS

[0004] The utility model provides a control system of digital micromirror equipment, and based on the characteristic that SDR (Software Defined Radio) technology can customize frequency, realizes the wireless of control data transmission of digital micromirror equipment, and the flexibility and safety are higher.

[0005] According to an aspect of the utility model, a control system of digital micromirror equipment is provided, which comprises a data sending end, a data receiving end and a control end, wherein:

[0006] The data sending end comprises a computer, an SDR base station and a first wireless transceiver, and the SDR base station is connected with the computer and the first wireless transceiver respectively;

[0007] The data receiving end comprises a second wireless transceiver, an SDR module and a DMD control module, the SDR module is connected with the second wireless transceiver and the DMD control module respectively, and the first wireless transceiver is connected with the second wireless transceiver;

[0008] The control end comprises a digital micromirror equipment, and the digital micromirror equipment is connected with the data receiving end.

[0009] Optionally, the data sending end further comprises a FLASH, a DDR, a FPGA and a computer interface.

[0010] Optionally, the computer interface is a USB interface, and the USB interface is configured to connect the computer to the data sending end.

[0011] Optionally, the data sending end further comprises a first SMA radio frequency connector, and the first SMA radio frequency connector is connected to the SDR base station and the first wireless transceiver respectively.

[0012] Optionally, the data sending end further comprises a first power supply module, and the first power supply module is configured to provide power for the data sending end.

[0013] Optionally, the SDR module comprises an SDR unit and a second SMA radio frequency connector, and the second SMA radio frequency connector is connected to the SDR unit and the second wireless transceiver respectively.

[0014] Optionally, the DMD control module comprises a FLASH, a DDR, a FPGA and a DMD interface, and the DMD control module is connected to the digital micro-mirror device through the DMD interface.

[0015] Optionally, the data receiving end further comprises a second power supply module, and the second power supply module is configured to provide power for the data receiving end.

[0016] Optionally, the first wireless transceiver and the second wireless transceiver are radio frequency antennas.

[0017] The technical scheme of the embodiment of the utility model provides a control system of digital micro-mirror device, including data sending end, data receiving end and control end, wherein: data sending end includes computer, SDR base station and first wireless transceiver, SDR base station is connected with computer and first wireless transceiver respectively;Data receiving end includes second wireless transceiver, SDR module and DMD control module, SDR module is connected with second wireless transceiver and DMD control module respectively, and first wireless transceiver is connected with second wireless transceiver;Control end includes digital micro-mirror device, and digital micro-mirror device is connected with data receiving end.The technical scheme is based on the characteristic that SDR technology can customize frequency, realizes the wireless of the control data transmission of digital micro-mirror device, compared with the wireless data transmission of adopting local area network, 3G or 4G technology, the freedom and flexibility of SDR technology are higher, and at the same time, relying on customized frequency can effectively avoid other users through frequency data theft, thereby improve the security of data.

[0018] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the utility model, and is not used to limit the scope of the utility model. Other features of the utility model will become easy to understand through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the technical scheme in the embodiments of the present application clearer, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings described in the following are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 is a structural schematic diagram of a control system of a digital micro-mirror device according to the present application;

[0021] Figure 2 is a structural schematic diagram of a data sending end according to the present application;

[0022] Figure 3 is a structural schematic diagram of a data receiving end according to the present application.

[0023] Reference signs:

[0024] 10, data sending end; 11, computer; 12, SDR base station; 13, first wireless transceiver; 14, FLASH; 15, DDR; 16, FPGA; 17, computer interface; 18, first SMA radio frequency connector; 19, first power supply module;

[0025] 20, data receiving end; 21, second wireless transceiver; 22, SDR module; 221, SDR unit; 222, second SMA radio frequency connector; 23, DMD control module; 231, FLASH; 232, DDR; 233, FPGA; 234, DMD interface; 24, second power supply module;

[0026] 30, control end; 31, digital micro-mirror device. DETAILED DESCRIPTION

[0027] In order to make the technical scheme in the embodiments of the present application clearer, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings described in the following are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0028] It should be noted that the terms "first", "second", "target" and the like in the description and claims of the present application and above-mentioned drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0029] Embodiment one

[0030] Figure 1 The structure diagram of the control system of the digital micro-mirror device provided by the present application, the present embodiment can be applicable to realize the wireless condition of the control data transmission of the digital micro-mirror device.

[0031] As Figure 1 The control system comprises a data sending end 10, a data receiving end 20 and a control end 30, wherein: the data sending end 10 comprises a computer 11, an SDR base station 12 and a first wireless transceiver 13, the SDR base station 12 is connected with the computer 11 and the first wireless transceiver 13 respectively; the data receiving end 20 comprises a second wireless transceiver 21, an SDR module 22 and a DMD control module 23, the SDR module 22 is connected with the second wireless transceiver 21 and the DMD control module 23 respectively, and the first wireless transceiver 13 is connected with the second wireless transceiver 21; the control end 30 comprises a digital micro-mirror device 31, and the digital micro-mirror device 31 is connected with the data receiving end 20.

[0032] Among them, the data sending end 10 and the data receiving end 20 are connected through the wireless transceiver, which can be used for wireless transmission of data between the data sending end 10 and the data receiving end 20 (including data sending and data receiving). The data receiving end 20 and the control end 30 can be connected through the interface.

[0033] Specifically, the computer 11 loads target control data (for controlling the digital micro-mirror device) through the visualization interface software, and sends the target control data to the SDR base station 12 after the loading is completed. The digital micro-mirror device (DMD) is an advanced semiconductor device that uses a large number of micro-mirror arrays to reflect light, and the projection or display of an image is realized through the flipping of the micro-mirror array (how to flip is determined by the target control data). After receiving the target control data, the SDR base station 12 modulates the target control data with a pre-set carrier signal using a digital quadrature modulation method to obtain reference control data, and transmits the reference control data through the first wireless transceiver 13. The frequency of the carrier signal can be selected according to actual needs, and the frequency range is 70MHz to 6GHz. The SDR module 22 of the data receiving end 20 receives the reference control data through the second wireless transceiver 21, demodulates the reference control data, restores the target control data, and sends the target control data to the DMD control module 23. After receiving the target control data, the DMD control module 23 updates the stored historical control data to the target control data, and sends the updated target control data to the control end 30, so that the control end 30 controls the digital micro-mirror device 31 according to the target control data.

[0034] In this embodiment, optionally, the data sending end 10 further comprises a FLASH 14, a DDR 15, a FPGA 16 and a computer interface 17.

[0035] Specifically, the computer 11 transmits the target control data to the FPGA 16 through the computer interface 17, and the FPGA 16 stores the received target control data in the DDR 15. Optionally, the computer interface 17 is a USB interface, which is used to connect the computer 11 to the data sending end 10. Exemplarily, the USB interface can be USB3.0. After waiting for the transmission of the computer 11 to end, the FPGA 16 transmits the target control data stored in the DDR 15 to the SDR base station 12. The FPGA 16 is connected to the SDR base station 12 through a parallel bus, and the SDR base station 12 includes an ADC register (for storing the target control data sent by the FPGA 16), and the FLASH 14 is used to store the underlying code of the DMD control.

[0036] In this embodiment, optionally, the data sending end 10 further comprises a first SMA radio frequency connector 18, which is connected with the SDR base station 12 and the first wireless transceiver 13 respectively.

[0037] The SMA radio frequency connector is a kind of ultra-small coaxial cable connector. Specifically, the SDR base station 12 is connected with the first SMA radio frequency connector 18, and the first SMA radio frequency connector 18 is connected with the first wireless transceiver 13 through an SMA interface.

[0038] Optionally, the data sending end 10 further comprises a first power supply module 19 for providing power for the data sending end 10.

[0039] Figure 2 A structural schematic diagram of the data sending end is provided. Figure 2 As shown in the figure, the data sending end 10 comprises a computer 11, an SDR base station 12, a first wireless transceiver 13, a FLASH 14, a DDR 15, an FPGA 16, a computer interface 17, a first SMA radio frequency connector 18 and a first power supply module 19.

[0040] Optionally, the DMD control module 23 comprises a FLASH 231, a DDR 232, an FPGA 233 and a DMD interface 234, and the DMD control module 23 is connected with the digital micro-mirror device 31 through the DMD interface 234.

[0041] The FPGA 233 is the core processor of the data receiving end 20, which can control the demodulation of signals, the verification and storage of the demodulated data and the data updating process. For example, the FPGA 233 can adopt a ZYNQMP chip.

[0042] Specifically, after the SDR module 22 receives the reference control data through the second wireless transceiver 21, the SDR module 22 can recover the target control data from the reference control data under the control of the FPGA 233 in the DMD control module 23, and temporarily store the target control data in the DDR 232. The DDR 232 is a double data rate synchronous dynamic random access memory, which has an addressing space of up to 4 Gb and can support mass data storage and temporary parameter storage. Then, the FPGA 233 performs data updating operation on the FLASH 231 according to the target control data stored in the DDR 232, so as to update the historical control data to the target control data. The FLASH 231 is divided into two areas of Golden Code (top code area) and Updata Code (code updating area), and each area occupies half of the memory of the FLASH 231, i.e., the top code area and the code updating area have the same size of memory. The code in the Golden Code is fixed and stored for a long time. When updating the control data of the DMD, only the software in the Updata Code area is updated. After the software updating is completed, the FPGA 233 controls the SDR module 22 to perform digital orthogonal modulation on the digital information of the updating completion instruction and the carrier signal, and then sends the result to the data sending end 10 through the second wireless transceiver 21. The SDR base station 12 parses the updating completion instruction and uploads it to the computer 11.

[0043] Further, after the target control data is recovered by the SDR module 22, the target control data can also be checked by the FPGA 233. For example, the data can be checked by using a CRC (Cyclic Redundancy Check Code) check. The cyclic redundancy check code includes a series of data encoding rules such as shifting and division, and the algorithm principle and the design and analysis of the algorithm program can be solved by corresponding software coding. Specifically, if the check is successful, the target control data is stored in the DDR 232; if the check fails, the digital information of the check failure instruction is modulated by the carrier signal by the SDR module 22 controlled by the FPGA 233, and is transmitted to the computer 11 of the data sending end 10 through the second wireless transceiver 21, and then is manually distinguished and reissued by the visual interface of the computer 11.

[0044] In this embodiment, the SDR module 22 includes an SDR unit 221 and a second SMA radio frequency connector 222, and the second SMA radio frequency connector 222 is connected with the SDR unit 221 and the second wireless transceiver 21 respectively.

[0045] The SDR unit 221 is an ADC chip (analog-to-digital converter, used for converting analog signals into digital signals), which is highly integrated, has two-way transceiving, and has a radio frequency of up to 6Ghz. The ADC chip adopts a direct frequency conversion architecture to achieve high modulation accuracy and low noise. The chip integrates an RF front end and a mixed signal baseband, and has a built-in frequency synthesizer to provide a configurable digital interface for the FPGA 233. The high programmability and wideband capability of the chip are suitable for the control system of the application.

[0046] Specifically, the SDR unit 221 is connected to the second SMA radio frequency connector 222, the second SMA radio frequency connector 222 is connected with the second wireless transceiver 21 through an SMA interface, and signals are received and sent through the second wireless transceiver 21. The second SMA radio frequency connector 222 has good shielding performance, low loss, high reliability, flexibility and other characteristics, and can realize seamless transmission of signals.

[0047] In this embodiment, the data receiving end 20 also includes a second power supply module 24, which is used to provide power for the data receiving end 20.

[0048] For example, the second power supply module 24 can use a power supply chip with corresponding functions. An array circuit with high current capacity can also be formed by the design of a peripheral circuit, which can effectively support the operation of the data receiving end 20 and meet the capacity redundancy design.

[0049] Figure 3 A structural diagram of a data receiving end is provided in the utility model. As shown in Figure 3As shown, the data receiving end 20 comprises a second wireless transceiver 21, an SDR unit 221, a second SMA radio frequency connector 222, a FLASH 231, a DDR 232, an FPGA 233, a DMD interface 234 and a second power supply module 24.

[0050] In the embodiment, the first wireless transceiver 13 and the second wireless transceiver 21 are both radio frequency antennas.

[0051] In the embodiment, the first wireless transceiver 13 and the second wireless transceiver 21 are both radio frequency antennas.

[0052] The technical scheme of the embodiment of the utility model provides a control system of digital micro-mirror device, including data sending end, data receiving end and control end, wherein: data sending end includes computer, SDR base station and first wireless transceiver, SDR base station is connected with computer and first wireless transceiver respectively;Data receiving end includes second wireless transceiver, SDR module and DMD control module, SDR module is connected with second wireless transceiver and DMD control module respectively, and first wireless transceiver is connected with second wireless transceiver;Control end includes digital micro-mirror device, and digital micro-mirror device is connected with data receiving end.The technical scheme is based on the characteristic that SDR technology can customize frequency, realizes the wireless of the control data transmission of digital micro-mirror device, compared with the wireless data transmission of adopting local area network, 3G or 4G technology, the freedom and flexibility of SDR technology are higher, and at the same time, relying on customized frequency can effectively avoid other users through frequency data theft, thereby improve the security of data.

[0053] The above specific embodiments do not constitute a limitation on the scope of protection of the utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A control system for a digital micromirror device, characterized in that, The control system includes a data transmitter (10), a data receiver (20), and a control terminal (30), wherein: The data transmitting end (10) includes a computer (11), an SDR base station (12) and a first wireless transceiver (13), wherein the SDR base station (12) is connected to the computer (11) and the first wireless transceiver (13) respectively. The data receiving end (20) includes a second wireless transceiver (21), an SDR module (22) and a DMD control module (23). The SDR module (22) is connected to the second wireless transceiver (21) and the DMD control module (23) respectively. The first wireless transceiver (13) is connected to the second wireless transceiver (21). The control terminal (30) includes a digital micromirror device (31), which is connected to the data receiving terminal (20).

2. The control system according to claim 1, characterized in that, The data transmitting end (10) also includes FLASH (14), DDR (15), FPGA (16) and computer interface (17).

3. The control system according to claim 2, characterized in that, The computer interface (17) is a USB interface, which is used to connect the computer (11) to the data sending end (10).

4. The control system according to claim 1, characterized in that, The data transmitting end (10) further includes a first SMA radio frequency connector (18), which is connected to the SDR base station (12) and the first wireless transceiver (13) respectively.

5. The control system according to any one of claims 1-4, characterized in that, The data transmitting end (10) further includes a first power supply module (19), which is used to provide power to the data transmitting end (10).

6. The control system according to claim 1, characterized in that, The SDR module (22) includes an SDR unit (221) and a second SMA RF connector (222), which is connected to the SDR unit (221) and the second wireless transceiver (21) respectively.

7. The control system according to claim 1, characterized in that, The DMD control module (23) includes FLASH (231), DDR (232), FPGA (233) and DMD interface (234), and the DMD control module (23) is connected to the digital micromirror device (31) through the DMD interface (234).

8. The control system according to claim 6 or 7, characterized in that, The data receiving end (20) further includes a second power supply module (24), which is used to provide power to the data receiving end (20).

9. The control system according to claim 1, characterized in that, Both the first wireless transceiver (13) and the second wireless transceiver (21) are radio frequency antennas.

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