High-resistance layer type liquid crystal lens driving system and method
By generating a high-frequency AC square wave signal through a signal generation module and multiplexing it into multiple driving signals through a multiplexing module, the problem that the high-resistivity liquid crystal lens driving device cannot meet the requirements of high frequency and multiple channels is solved, thus improving the effect of optical experiments.
Patent Information
- Application Number
- CN202511216972.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-28
- Publication Date
- 2025-11-14
AI Technical Summary
Existing liquid crystal lens driving devices cannot provide high-frequency AC square wave signals and multi-channel driving signals, which cannot meet the driving requirements of high-resistivity liquid crystal lenses, resulting in poor optical experimental results.
A high-frequency AC square wave signal is generated by a signal generation module, converted into an amplified signal by a signal amplification module, and then multiplexed into multiple driving signals by a multiplexing module. These signals are applied to the external electric field of the high-resistivity liquid crystal lens to adjust its optical performance.
It meets the requirements for high-frequency and multi-path drive signals, reduces the size and power consumption of drive equipment, and improves the applicability and effectiveness of optical experiments.
Smart Images
Figure CN120949489A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of liquid crystal lens technology, and in particular to a high-resistivity liquid crystal lens driving system and method. Background Technology
[0002] In the field of liquid crystal lenses, liquid crystal lenses can flexibly adjust their optical performance by applying an external electric field to control the spatially non-uniform electric field without changing their external shape, thereby altering the effective refractive index of the liquid crystal. Among these, the emergence of high-resistivity liquid crystal lenses has solved the problem of discontinuous electric field distribution in lenses while maintaining advantages such as large aperture and low power consumption.
[0003] The inventors in this field have discovered that, in the experimental process of high-resistivity liquid crystal lenses, current liquid crystal lens driving devices cannot provide high-frequency AC square wave signals, which cannot meet the driving frequency requirements of high-resistivity liquid crystal lenses. On the other hand, arbitrary waveform generators can be used in the laboratory to drive the lenses to meet the frequency requirements, but their output channel number is limited, which cannot provide more driving signals and cannot meet the requirements for the number of driving signals.
[0004] In general, the driving conditions for high-resistivity liquid crystal lenses are currently difficult to meet, resulting in poor results in optical experiments using high-resistivity liquid crystal lenses. Summary of the Invention
[0005] This application provides a high-resistivity liquid crystal lens driving system and method, which can provide high-frequency and multi-path driving signals for high-resistivity liquid crystal lenses, thereby improving the effect of optical experiments on high-resistivity liquid crystal lenses.
[0006] In a first aspect, embodiments of this application provide a high-resistivity liquid crystal lens driving system, the high-resistivity liquid crystal lens driving system comprising:
[0007] A signal generation module is used to generate a source signal based on a direct digital frequency synthesis chip, wherein the source signal is a high-frequency AC square wave signal.
[0008] A signal amplification module is connected to the signal generation module, and the signal amplification module is used to convert the input source signal into an amplified signal and output it.
[0009] A multiplexing module is provided, which is connected to the signal amplification module. The multiplexing module is used to multiplex the input amplified signal into at least two driving signals. The at least two driving signals are used to apply an external electric field to the high-resistivity liquid crystal lens, and the external electric field is used to adjust the optical performance of the high-resistivity liquid crystal lens.
[0010] In another embodiment, the high-resistivity liquid crystal lens driving system further includes:
[0011] A control module is connected to the signal generation module, the signal amplification module, and the multiplexing module. The control module is used to control the multiplexing module to output a target signal that meets the signal requirements of the signal adjustment parameters according to the signal adjustment parameters. The target signal is the drive signal of any channel.
[0012] In another embodiment, the signal conditioning parameters include voltage conditioning parameters, frequency conditioning parameters, and phase conditioning parameters;
[0013] The signal generation module is used to generate the source signal that conforms to the time-division multiplexing of each gradient voltage, each frequency value, and each phase value;
[0014] The multiplexing module is used to adjust the voltage, frequency, and phase of the drive signal of any one path according to the voltage adjustment parameter, the frequency adjustment parameter, and the phase adjustment parameter.
[0015] In another embodiment, the multiplexing module includes:
[0016] A shift register, which is connected to the control module;
[0017] The shift register is used to generate scan timing signals, which are used to control the on / off state of the drive signals for each path.
[0018] In another embodiment, the high-resistivity liquid crystal lens driving system further includes:
[0019] An analog multiplexer, which is connected to the shift register;
[0020] The analog multiplexer is used to multiplex the amplified signal into drive signals for at least two paths according to the scan timing signal.
[0021] In another embodiment, the high-resistivity liquid crystal lens driving system further includes:
[0022] An energy storage module, comprising at least two capacitors connected in parallel, wherein the first end of each capacitor is connected to the output terminal of the analog multiplexer, and the second end of each capacitor is connected to a first connection point.
[0023] The energy storage module is used to stabilize the voltage value of the drive signal in each channel.
[0024] In another embodiment, the high-resistivity liquid crystal lens driving system further includes:
[0025] A sampling and adjustment module, which is connected to both the multiplexing module and the control module;
[0026] The sampling adjustment module is used to sample the drive signal output by the multiplexing module to obtain a sampled signal, and the sampled signal is used to characterize the signal features of the drive signal.
[0027] In another embodiment, the high-resistivity liquid crystal lens driving system further includes:
[0028] A display module is connected to the sampling adjustment module;
[0029] The sampling adjustment module is used to draw and display the signal image of the driving signal of each channel according to the signal characteristics of the driving signal characterized by the sampling signal; the signal image is used to determine whether the driving signal of each channel meets the driving requirements of the high-resistivity liquid crystal lens.
[0030] In another embodiment, the high-resistivity liquid crystal lens driving system further includes:
[0031] A communication module, which is connected to the control module;
[0032] A host computer is connected to a communication module, and the host computer transmits control commands to the control module based on the communication module.
[0033] Secondly, embodiments of this application provide a high-resistivity liquid crystal lens driving method, applied to any of the high-resistivity liquid crystal lens driving systems described in the above embodiments, the method comprising:
[0034] The source signal is generated by a direct digital frequency synthesis chip configured in the signal generation module. The source signal is a high-frequency AC square wave signal.
[0035] The input source signal is converted into an amplified signal and output through a signal amplification module;
[0036] The input amplified signal is multiplexed into at least two drive signals using a multiplexing module;
[0037] The driving signals of the at least two channels are applied to the external electric field of the high-resistivity liquid crystal lens to adjust the optical performance of the high-resistivity liquid crystal lens.
[0038] Compared to existing driving methods, in this embodiment, a high-frequency AC square wave signal is generated as the source signal by a direct digital frequency synthesis chip in the signal generation module. The input source signal is then converted into an amplified signal and output by a signal amplification module. The amplified signal is then multiplexed into at least two driving signals using a multiplexing module, which are applied to the external electric field of the high-resistivity liquid crystal lens to adjust its optical performance. This approach satisfies both the need for high-frequency driving signals and the requirement for multiple driving signals in optical experiments. A specialized circuit design is implemented for the specific driving field of high-resistivity liquid crystal lenses, reducing the size of the driving device and the complexity of the circuit. This reduces the cost and power consumption of the driving device, improves the applicability of the driving signal in optical experiments, and enhances the effectiveness of optical experiments on high-resistivity liquid crystal lenses. Attached Figure Description
[0039] Figure 1 This is a schematic diagram of a high-resistivity liquid crystal lens driving system in one embodiment;
[0040] Figure 2 This is a schematic diagram of the signal amplification module in one embodiment;
[0041] Figure 3 This is a circuit diagram of the signal amplification module in one embodiment;
[0042] Figure 4 This is a schematic diagram of the high-resistivity liquid crystal lens driving system in another embodiment;
[0043] Figure 5 This is a schematic diagram of the structure of a multiplexing module in one embodiment;
[0044] Figure 6 This is a first circuit diagram of a multiplexing module in one embodiment;
[0045] Figure 7 This is a second circuit diagram of a multiplexing module in one embodiment;
[0046] Figure 8 This is a third circuit diagram of a multiplexing module in one embodiment;
[0047] Figure 9 This is a schematic diagram of the high-resistivity liquid crystal lens driving system in another embodiment;
[0048] Figure 10 This is a circuit diagram of the sampling adjustment module in one embodiment;
[0049] Figure 11 This is a schematic diagram of the high-resistivity liquid crystal lens driving system in another embodiment;
[0050] Figure 12 This is a circuit diagram of a signal generation module in one embodiment;
[0051] Figure 13 This is a first image display diagram of the drive signal in one embodiment;
[0052] Figure 14 This is a second image display diagram of the drive signal in one embodiment;
[0053] Figure 15 This is a third image display of the drive signals in one embodiment;
[0054] Figure 16 This is a fourth image display of the drive signals in one embodiment;
[0055] Figure 17 This is a fifth image display of the drive signals in one embodiment;
[0056] Figure 18 This is a sixth image display of the drive signals in one embodiment;
[0057] Figure 19 This is a schematic diagram of the high-resistivity liquid crystal lens driving system in another embodiment;
[0058] Figure 20 This is a circuit diagram of the communication module in one embodiment;
[0059] Figure 21 This is a schematic diagram of the first power supply in one embodiment;
[0060] Figure 22 This is a schematic diagram of the second power supply in one embodiment;
[0061] Figure 23 This is a schematic flowchart of a high-resistivity liquid crystal lens driving method in one embodiment. Detailed Implementation
[0062] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or modules is not necessarily limited to those explicitly listed, but may include other steps or modules not explicitly listed or inherent to these processes, methods, products, or devices. The division of modules in the embodiments of this application is merely a logical division; in actual applications, there may be other division methods. For example, multiple modules may be combined into or integrated into another system, or some features may be ignored or not performed. Additionally, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interface, and the indirect coupling or communication connection between modules may be electrical or other similar forms, none of which are limited in the embodiments of this application. Furthermore, the modules or sub-modules described as separate components may or may not be physically separated, may or may not be physical modules, or may be distributed among multiple circuit modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments of this application.
[0063] Please refer to Figure 1 The following describes a high-resistivity liquid crystal lens driving system provided in the embodiments of this application, including a signal generation module 100, a signal amplification module 200, and a multiplexing module 300; the signal generation module 100 is connected to the signal amplification module 200, and the multiplexing module 300 is connected to the signal amplification module 200.
[0064] The signal generation module 100 is used to generate a source signal based on the direct digital frequency synthesis chip, also known as a DDS (Direct Digital Synthesizer) chip, which is a chip with high-frequency signal generation function; the source signal is the signal source generated by the signal generation module 100 as the driving signal, for example, the source signal is a high-frequency AC square wave signal.
[0065] In this embodiment, a DDS chip is selected to construct the signal generation module 100, which improves the frequency band of the generated signal. For example, it can generate an AC square wave signal at half the clock frequency (e.g., 75MHz), which can better meet the needs of high-frequency driving signals in the optical experiments of high-resistivity liquid crystal lenses.
[0066] The signal amplification module 200 is used to convert the input source signal into an amplified signal and output it. The amplified signal is the signal obtained after the source signal is amplified by the signal amplification module.
[0067] Generally, the signal amplification module 200 can be a single-stage amplification or a multi-stage amplification. Taking a two-stage amplification in a multi-stage amplification as an example, such as... Figure 2 As shown, the signal amplification module 200 includes a first-stage amplifier circuit 210 and a second-stage amplifier circuit 220.
[0068] More specifically, such as Figure 3 As shown, Figure 3 This is a circuit diagram of a signal amplification module in one embodiment. Figure 3 Chip U9 (model AD8065ARTZ-R2) and chip U18 (model AD8065ARTZ-R2) are used to form the first-stage amplifier circuit 210; while chip U10 (model THS3091DDAR) and chip U31 (model THS3091DDAR) are used to form the second-stage amplifier circuit 220.
[0069] Among them, VOA+ and VOA- are the positive and negative signals of one output path of the DDS chip, and similarly, VOB+ and VOB- are the positive and negative signals of the other output path of the DDS chip.
[0070] In the first-stage amplifier circuit 210, chip U9 is connected to the input terminals VOA+ and VOA- of the signal amplification module through connection points 11+ and 11-, and chip U19 is connected to the input terminals VOB+ and VOB- of the signal amplification module through connection points 22+ and 22-. After the signal is amplified in the first stage, the first-stage amplified signal is output through OUTA and OUTB.
[0071] In the secondary amplifier circuit 220, chip U10 is connected to the OUTA output terminal of chip U9 via connection point 111- and resistor R13, and chip U31 is connected to the OUTB output terminal of chip U18 via connection point 222- and resistor R39. Additionally, connection point 111- is connected to the output terminal OUT1 of U10 via resistor R14, and connection point 111+ is grounded via resistors R15 and R16. Connection point 222- is connected to the output terminal OUT2 of U31 via resistor R40, and connection point 222+ is grounded via resistors R41 and R42. After the signal is amplified in the second stage, the secondary amplified signal is output through output terminals OUT1 and OUT2, thus realizing multi-stage amplification of the signal output from the DDS chip to the signal amplification circuit.
[0072] based on Figures 2 to 3The design of the signal amplifier circuit 200 adopts a multi-stage amplification method to ensure that the bandwidth of each operational amplifier is maximized, thereby realizing the amplification of higher frequency source signals and achieving higher frequency signal output, thus better meeting the driving signal requirements of optical experiments of high-resistivity liquid crystal lenses.
[0073] The multiplexing module 300 is used to multiplex the input amplified signal into at least two drive signals; furthermore, the drive signals can be multiplexed into 4, 8, and 16 channels. The specific number of drive signal channels depends on the chip function and optical experiment requirements, and this embodiment does not impose specific limitations.
[0074] Specifically, at least two driving signals are used to apply an external electric field to the high-resistivity liquid crystal lens, and the external electric field is used to adjust the optical performance of the high-resistivity liquid crystal lens; wherein, adjusting the optical performance of the high-resistivity liquid crystal lens includes adjusting the effective refractive index of the lens.
[0075] Compared to existing driving methods, in this embodiment, a high-frequency AC square wave signal is generated as the source signal by a direct digital frequency synthesis chip in the signal generation module. The input source signal is then converted into an amplified signal and output by a signal amplification module. The amplified signal is then multiplexed into at least two driving signals using a multiplexing module, which are applied to the external electric field of the high-resistivity liquid crystal lens to adjust its optical performance. This approach satisfies both the need for high-frequency driving signals and the requirement for multiple driving signals in optical experiments. A specialized circuit design is implemented for the specific driving field of high-resistivity liquid crystal lenses, reducing the size of the driving device and the complexity of the circuit. This reduces the cost and power consumption of the driving device, improves the applicability of the driving signal in optical experiments, and enhances the effectiveness of optical experiments on high-resistivity liquid crystal lenses.
[0076] Optionally, in another embodiment, such as Figure 4 As shown, the high-resistivity liquid crystal lens driving system also includes a control module 400, which is connected to the signal generation module 100, the signal amplification module 200, and the multiplexing module 300.
[0077] The control module 400 is used to control the multiplexing module 300 to output a target signal that meets the signal requirements of the signal conditioning parameters according to the signal conditioning parameters. The target signal is the drive signal of any channel.
[0078] Specifically, the control module can be a processor, controller, etc. For example, the control module is an STM32 MCU (Microcontroller Unit) used to control the coordinated operation between other circuit modules.
[0079] This embodiment allows for signal conditioning via software. The control module can adjust the multiplexed signal based on the adjustment indices of the parameters represented in the signal conditioning parameters, thereby achieving personalized customization of the driving signal for each path. This allows the adjustment of the driving signal for each path to be performed independently, which greatly enhances the diversity and flexibility of the driving signal and significantly improves the optical experiment effect on high-resistivity liquid crystal lenses.
[0080] In another embodiment, the signal conditioning parameters include voltage conditioning parameters, frequency conditioning parameters, and phase conditioning parameters; the signal generation module 100 is used to generate time-division multiplexed source signals that conform to each gradient voltage, each frequency value, and each phase value; the multiplexing module 300 is used to adjust the voltage, frequency, and phase of the drive signal of any path according to the voltage conditioning parameters, frequency conditioning parameters, and phase conditioning parameters.
[0081] Specifically, in the voltage control process, the voltage adjustment parameter can be a voltage gradient selection parameter. For example, the selectable voltage gradients include 2V, 3V, and 4V. After the signal generation module 100 is set, it can generate a timing signal with the above-mentioned voltage gradient. For example, a 2V square wave signal is generated from time t1 to t2, a 3V square wave signal is generated from time t2 to t3, and a 4V square wave signal is generated from time t3 to t4. This results in a time-division multiplexed signal. The voltage adjustment parameter s1 corresponding to 2V is then input to the multiplexing module, and this 2V AC square wave signal can be output in the pre-selected channel, thereby achieving precise voltage control for a specific path.
[0082] Similarly, in the frequency control process, the frequency adjustment parameter can be a parameter set for the frequency, such as a control word. Then, based on the control word, the signal of a specific frequency is output in the preset channel, thereby achieving precise control of the frequency of a specific channel. The phase control process is similar in principle and steps to the frequency control process, so it will not be elaborated here.
[0083] In this embodiment, by setting voltage adjustment parameters, frequency adjustment parameters, and phase adjustment parameters, the voltage, frequency, and phase of the driving signal of a specific channel are independently controlled, so that the adjustment of the driving signal of each channel can be performed independently, thereby greatly improving the diversity and flexibility of the driving signal and greatly improving the effect of optical experiments on high-resistivity liquid crystal lenses.
[0084] In another embodiment, such as Figure 5 As shown, the multiplexing module 300 includes a shift register 310, which is connected to the control module 400.
[0085] The shift register 310 is used to generate the scan timing signal, which is used to control the on / off state of the drive signals of each path.
[0086] Specifically, shift register 310 can be a 74HC595 shift register, and the on / off control process can be as follows: control the 3-bit binary address signal (A0-A2) generated by the 74HC595 shift register, with 8 states (000, 001, ..., 111), corresponding to 8 independent channels to perform channel selection of the multiplexer.
[0087] This embodiment uses a shift register design and scan timing signals to control the on / off state of the drive signals for each path, thus achieving on / off control of the drive signals for each path. This provides a wider selection of the number of drive signal paths, thereby improving the flexibility of optical experiments.
[0088] In another embodiment, the high-resistivity liquid crystal lens driving system further includes an analog multiplexer 320, which is connected to the shift register 310.
[0089] The analog multiplexer 320 is used to multiplex the amplified signal into at least two drive signals according to the scan timing signal. For example, the analog multiplexer 320 is a 16-channel analog multiplexer (model MUX36S16IPWR). If a 3-bit binary address signal (A0-A2) is used as the scan timing signal, 8 of the channels can be selected to output drive signals, thereby realizing the multiplexing of multiple drive signals.
[0090] In another embodiment, the high-resistivity liquid crystal lens driving system further includes an energy storage module 330, which includes at least two capacitors connected in parallel. The first end of each capacitor is connected to the output terminal of an analog multiplexer, and the second end of each capacitor is connected to a first connection point. The energy storage module is used to stabilize the voltage value of the driving signal of each path.
[0091] The following reference Figures 6 to 8 The specific structure and function of the multiplexing module 300 are illustrated using a specific embodiment, wherein, Figure 6 The circuit diagram includes a 74HC595 shift register. Figure 7 The circuit diagram shows a 16-channel analog multiplexer. Figure 8 This is the circuit diagram for the energy storage module.
[0092] The shift register is connected to a 16-channel analog multiplexer via the ports of binary address signals (A0-A2), and then to one end of each of the eight capacitors in the energy storage module via the ports of the eight channels S1-S8. The second end of each capacitor is connected to the first connection point. The first connection point is the convergence point of the second ends of all the capacitors.
[0093] In this embodiment, taking the voltage control process as an example, the 16-channel analog multiplexer MUX36S16IPWR multiplexes the source signal output from the amplification module into 8 signals. The main control chip controls the 74HC595 shift register through SPI (Serial Peripheral Interface), and generates scan timing signals through the 74HC595 shift register. The 8 output selections are controlled by 3 address lines. The source signal and the scan timing signal act simultaneously on the 16-channel analog multiplexer. The channel switching is controlled by the address lines, and the source signal is assigned to the specified output channel. Each output channel is connected to a 5nF energy storage capacitor, and the voltage value is maintained by the RC circuit principle. This voltage is used to drive the high-resistivity layer electrode type liquid crystal lens.
[0094] More specifically, the MCU controls the 3-bit binary address signal (A0-A2) generated by the 74HC595 shift register via SPI. The 8 states (000, 001, ..., 111) correspond to 8 independent channels to select the channels of the MUX36S16IPWR multiplexer. The output voltage of this channel needs to be implemented by the MCU and the DDS chip.
[0095] For example, to set the output voltage Vout of this path to 10V, use the formula... The VDAC voltage is obtained and converted into DAC code. This DAC code is used to control the output voltage of this channel. If the voltage of this channel needs to be changed, the DAC code can be obtained again using the above formula, thus achieving independent control of the voltage of each channel. Periodic control is achieved through the principle of preset gradient and cyclic refresh. The charging and discharging in the energy storage module is to maintain and modify the voltage value, so as to better control the voltage and improve the experimental results.
[0096] In another embodiment, refer to Figure 9 The high-resistivity liquid crystal lens driving system also includes a sampling adjustment module 500, which is connected to the multiplexing module 300 and the control module 400 respectively. The sampling adjustment module 500 is used to sample the driving signal output by the multiplexing module to obtain a sampling signal, which is used to characterize the signal features of the driving signal.
[0097] Specifically, such as Figure 10 As shown, Figure 10 The circuit diagram shows the sampling adjustment module. The sampling adjustment circuit uses an ADC (Analog-to-Digital Converter) to adjust the output AC square wave signal in real time, so that the signal can be displayed later to determine whether it meets the experimental requirements.
[0098] It should be noted that the sampling adjustment module can be connected to a display module (such as an LCD screen) via an image display interface for image display, or it can directly connect the sampled data to an oscilloscope without an image display interface, and use the oscilloscope to adjust the signal. This is the embodiment provided in this application. Figure 10 The specific port design of the sampling adjustment module is merely an example and should not be construed as a limitation on the technical solution of this application. Those skilled in the art can adjust the specific circuit according to actual needs to meet the sampling and adjustment requirements in the experiment.
[0099] In another embodiment, refer to Figure 11 The high-resistivity liquid crystal lens driving system also includes a display module 600, which is connected to a sampling adjustment module 500. The sampling adjustment module 500 is used to draw and display the signal image of each channel driving signal based on the signal characteristics of the driving signal represented by the sampling signal. The signal image is used to determine whether the driving signal of each channel meets the driving requirements of the high-resistivity liquid crystal lens.
[0100] Specifically, such as Figure 12 As shown, Figure 12 The circuit diagram of the signal generation module in one embodiment is shown. The signal generation module uses DDS chip U1 (model AD9834BRUZ). During the debugging stage, the voltage entering the ADC module can be kept within the normal range by adjusting resistor R15. The display module can be an LCD screen for real-time display and adjustment of the output signal.
[0101] If the image of the driving signal in the display module meets the requirements of optical experiments after observation and testing, the driving signal of this path can be applied to optical experiments. The signal can be optimized and debugged by software, that is, the signal characteristics can be debugged by adjusting the signal adjustment parameters to achieve the preset voltage output of the driving signal, thereby realizing the output of multiple high-frequency signals.
[0102] For example, Figures 13 to 18 In one embodiment, the display module displays an image of the drive signal, wherein... Figure 13 The waveform of an AC square wave with a voltage of 1V and a frequency of 50kHz is shown. Figure 14 The waveform diagram is an AC square wave with a voltage of 5V and a frequency of 50kHz. Figure 15 The waveform of an AC square wave with a voltage of 5V and a frequency of 200kHz is shown. Figure 16 The waveform diagram is an AC square wave with a voltage of 10V and a frequency of 200kHz. Figure 17 The waveform diagram is an AC square wave with a voltage of 5V and a frequency of 500kHz. Figure 18The image shows an AC square wave waveform with a voltage of 10V and a frequency of 500kHz. The image resolution is 0.28Hz, which meets the high-frequency and multi-channel driving requirements of high-resistivity liquid crystal lenses.
[0103] In another embodiment, see Figure 19 The high-resistivity liquid crystal lens driving system also includes a communication module 700 and a host computer 800. The communication module 700 is connected to the control module 400, and the host computer 800 is connected to the communication module 700. The host computer 800 transmits control commands to the control module 400 based on the communication module 700.
[0104] Specifically, see Figure 20 , Figure 20 This is a circuit diagram of the communication module. The data communication circuit includes two data interaction methods: wireless and wired, namely Bluetooth serial communication and UART serial communication.
[0105] In another embodiment, see Figure 21 and Figure 22 The high-resistivity liquid crystal lens driving system also includes a power supply module, which includes, but is not limited to, a linear regulator circuit and a boost circuit. The power supply circuit uses a 5V 1A USB power supply, and generates voltage through the linear regulator circuit. Figure 21 The 3.3V reference voltage and such Figure 22 The boost circuit generates a ±10V reference voltage to power each module.
[0106] In another embodiment, such as Figure 23 As shown, this application provides a high-resistivity liquid crystal lens driving method, applied to the high-resistivity liquid crystal lens driving system as described in any of the above embodiments. The method includes the following steps:
[0107] S2301 generates the source signal through the direct digital frequency synthesis chip configured in the signal generation module;
[0108] S2302 converts the input source signal into an amplified signal and outputs it through a signal amplification module;
[0109] S2303 uses a multiplexing module to multiplex the input amplified signal into at least two drive signals;
[0110] S2304 applies driving signals from at least two channels to the external electric field of the high-resistivity liquid crystal lens to adjust the optical performance of the high-resistivity liquid crystal lens.
[0111] The source signal is a high-frequency AC square wave signal.
[0112] In this embodiment, based on the modular design of the high-resistivity liquid crystal lens driver, a method for testing and building the driving circuit is provided. First, a source signal is generated by the direct digital frequency synthesis chip configured in the signal generation module. Then, the input source signal is converted into an amplified signal by the signal amplification module. Next, the input amplified signal is multiplexed into multiple driving signals by the multiplexing module. Finally, the multiple driving signals are applied to the external electric field of the high-resistivity liquid crystal lens to adjust its optical performance. By accurately generating the source signal, ensuring signal stability through multi-stage amplification, and expanding the driving path through multiplexing, the accurate output of multi-channel high-frequency driving signals is achieved, which meets the requirements of the high-resistivity liquid crystal lens for driving signal frequency and number of channels, and improves light control and imaging quality.
[0113] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0114] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and modules described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.
[0115] In the embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, apparatuses, or modules, and may be electrical, mechanical, or other forms.
[0116] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.
[0117] Furthermore, the functional modules in the various embodiments of this application can be integrated into one processing module, or each module can exist physically separately, or two or more modules can be integrated into one module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can be stored in a computer-readable storage medium.
[0118] In the above embodiments, the implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, in the form of a computer program product.
[0119] The technical solutions provided in the embodiments of this application have been described in detail above. Specific examples have been used in the embodiments of this application to illustrate the principles and implementation methods of the embodiments of this application. The description of the above embodiments is only for the purpose of helping to understand the methods and core ideas of the embodiments of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the embodiments of this application. Therefore, the content of this specification should not be construed as a limitation on the embodiments of this application.
Claims
1. A high-resistivity liquid crystal lens driving system, characterized in that, The high-resistivity liquid crystal lens driving system includes: A signal generation module is used to generate a source signal based on a direct digital frequency synthesis chip, wherein the source signal is a high-frequency AC square wave signal. A signal amplification module is connected to the signal generation module, and the signal amplification module is used to convert the input source signal into an amplified signal and output it. A multiplexing module is provided, which is connected to the signal amplification module. The multiplexing module is used to multiplex the input amplified signal into at least two driving signals. The at least two driving signals are used to apply an external electric field to the high-resistivity liquid crystal lens, and the external electric field is used to adjust the optical performance of the high-resistivity liquid crystal lens.
2. The high-resistivity liquid crystal lens driving system according to claim 1, characterized in that, The high-resistivity liquid crystal lens driving system also includes: A control module is connected to the signal generation module, the signal amplification module, and the multiplexing module. The control module is used to control the multiplexing module to output a target signal that meets the signal requirements of the signal adjustment parameters according to the signal adjustment parameters. The target signal is the drive signal of any channel.
3. The high-resistivity liquid crystal lens driving system according to claim 2, characterized in that, The signal conditioning parameters include voltage conditioning parameters, frequency conditioning parameters, and phase conditioning parameters; The signal generation module is used to generate the source signal that conforms to the time-division multiplexing of each gradient voltage, each frequency value, and each phase value; The multiplexing module is used to adjust the voltage, frequency, and phase of the drive signal of any one path according to the voltage adjustment parameter, the frequency adjustment parameter, and the phase adjustment parameter.
4. The high-resistivity liquid crystal lens driving system according to claim 2, characterized in that, The multiplexing module includes: A shift register, which is connected to the control module; The shift register is used to generate scan timing signals, which are used to control the on / off state of the drive signals for each path.
5. The high-resistivity liquid crystal lens driving system according to claim 4, characterized in that, The high-resistivity liquid crystal lens driving system also includes: An analog multiplexer, which is connected to the shift register; The analog multiplexer is used to multiplex the amplified signal into drive signals for at least two paths according to the scan timing signal.
6. The high-resistivity liquid crystal lens driving system according to claim 5, characterized in that, The high-resistivity liquid crystal lens driving system also includes: An energy storage module, comprising at least two capacitors connected in parallel, wherein the first end of each capacitor is connected to the output terminal of the analog multiplexer, and the second end of each capacitor is connected to a first connection point. The energy storage module is used to stabilize the voltage value of the drive signal in each channel.
7. The high-resistivity liquid crystal lens driving system according to claim 2, characterized in that, The high-resistivity liquid crystal lens driving system also includes: A sampling and adjustment module, which is connected to both the multiplexing module and the control module; The sampling adjustment module is used to sample the drive signal output by the multiplexing module to obtain a sampled signal, and the sampled signal is used to characterize the signal features of the drive signal.
8. The high-resistivity liquid crystal lens driving system according to claim 7, characterized in that, The high-resistivity liquid crystal lens driving system also includes: A display module is connected to the sampling adjustment module; The sampling adjustment module is used to draw and display the signal image of the driving signal of each channel according to the signal characteristics of the driving signal characterized by the sampling signal; the signal image is used to determine whether the driving signal of each channel meets the driving requirements of the high-resistivity liquid crystal lens.
9. The high-resistivity liquid crystal lens driving system according to claim 2, characterized in that, The high-resistivity liquid crystal lens driving system also includes: A communication module, which is connected to the control module; A host computer is connected to a communication module, and the host computer transmits control commands to the control module based on the communication module.
10. A method for driving a high-resistivity liquid crystal lens, characterized in that, The method, applied to the high-resistivity liquid crystal lens driving system as described in any one of claims 1 to 9, comprises: The source signal is generated by a direct digital frequency synthesis chip configured in the signal generation module. The source signal is a high-frequency AC square wave signal. The input source signal is converted into an amplified signal and output through a signal amplification module; The input amplified signal is multiplexed into at least two drive signals using a multiplexing module; The driving signals of the at least two channels are applied to the external electric field of the high-resistivity liquid crystal lens to adjust the optical performance of the high-resistivity liquid crystal lens.