Driving equipment of high-voltage alternating-current electroluminescent array

Abstract

According to the driving equipment of the high-voltage alternating-current electroluminescent array provided by the invention, through cooperative work of the high-voltage generation module and the multi-channel shift register module, efficient, flexible and miniaturized driving of the electroluminescent array can be realized, and the driving equipment has dynamic parameter adjustment and multi-channel cooperative control capabilities; meanwhile, the equipment is small in size, the wearable equipment level can be achieved, and free application scenes are achieved; finally, the complexity of an external control circuit is reduced through the simplified circuit design, the hardware cost is reduced, and the circuit has the advantages of being low in cost and high in expansibility.

Description

Technical Field

[0001] This invention belongs to the field of electroluminescent display and driving technology, and particularly relates to a driving device for a high-voltage AC electroluminescent array. Background Technology

[0002] Electroluminescent (EL) devices are widely used in display and lighting fields due to their advantages such as self-illumination, wide viewing angle, fast response, and thinness. Traditional high-voltage AC EL devices typically employ driving schemes based on transformers or dedicated high-voltage driver chips, such as using Royer oscillator circuits or half-bridge / full-bridge inverter structures to generate high-voltage AC signals. For array-based driving, a common approach is to use row and column scanning combined with high-voltage switches (such as MOSFETs or IGBTs) to drive EL cells row-by-row or column-by-column through time-division multiplexing. In recent years, research has also explored integrated driver ICs or FPGA-based digital control methods to achieve multi-channel high-voltage output and grayscale adjustment. However, these existing solutions still have many limitations in terms of driving flexibility, integration, power consumption, and size.

[0003] A common approach uses a microcontroller (MCU) combined with a half-bridge driver and high-voltage MOSFETs to generate PWM signals via software control, which are then boosted by a transformer to drive the EL devices. While this approach can achieve multi-channel output, the external circuitry is complex and bulky, and the high-voltage and low-voltage control sections require isolation, increasing system complexity and cost. Furthermore, some existing technologies use CPLD or FPGA-based digital logic to generate multiple high-voltage control signals, then use high-voltage shift registers for serial-to-parallel conversion and level shifting to drive the EL array line by line. However, this approach typically has a fixed output mode, cannot adjust drive parameters in real time according to the EL device status, and is inadequate in terms of multi-channel coordination and energy efficiency control.

[0004] In summary, existing electroluminescent array driving technologies suffer from the following problems: First, the driving method is fixed, making it impossible to dynamically adjust parameters according to different operating states of the electroluminescent devices, resulting in low driving efficiency and even device damage. Second, traditional driving methods are mostly single-channel outputs, making it difficult to achieve uniform display of complex patterns. Third, the devices are large and lack portability, limiting their application in wearable devices and other fields. Fourth, there is a lack of intelligent control mechanisms, making it impossible to dynamically optimize driving parameters based on actual display effects, affecting display quality and energy consumption. Fifth, multi-channel collaborative driving technology is rarely used, making it difficult to achieve complex display effects. Therefore, it is essential to develop an efficient, flexible, miniaturized electroluminescent array driving method with intelligent control. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a driving device for a high-voltage AC electroluminescent array. Through the coordinated operation of a high-voltage generation module and a multi-channel shift register module, the AC electroluminescent array can be driven efficiently.

[0006] A driving device for a high-voltage AC electroluminescent array includes a processing module, a multi-channel shift register module, a high-voltage generation module, and an electroluminescent array; wherein, the electroluminescent array emits different colors depending on the frequency of the AC signal driving the electroluminescent array. The processing module is used to receive and parse instruction data from an external terminal to obtain the target pattern, brightness level, and color parameters. The processing module is also used to adjust the voltage amplitude represented by each element in the high voltage signal array output by the high voltage generation module according to the target pattern and brightness level, and to adjust the frequency of the AC signal output by the multi-channel shift register module according to the color parameters. The multi-channel shift register module is used to output AC signals regularly through each channel under the drive of the high-voltage signal array. The AC signals then drive the corresponding pixels of the electroluminescent array to emit light, thereby completing the display of the target pattern. The amplitude of the AC signal is positively correlated with the voltage amplitude represented by each element in the high-voltage signal array. Pixels corresponding to elements with voltage amplitudes less than a set threshold do not emit light. For pixels corresponding to elements with voltage amplitudes not less than the set threshold, the larger the voltage amplitude, the stronger the light intensity emitted by the corresponding pixel.

[0007] Furthermore, the multi-channel shift register module is a 64-channel shift register; the electroluminescent array consists of 32×32 electroluminescent devices; The outputs of registers 1–32 of the 64-channel shift register serve as column drivers, which are connected to the lower electrodes of the electroluminescent devices in columns 1–32 of the electroluminescent array, respectively; the outputs of registers 33–64 of the 64-channel shift register serve as row drivers, which are connected to the upper electrodes of the electroluminescent devices in rows 1–32 of the electroluminescent array, respectively. The multi-channel shift register module is used to regularly output AC signals between its designated column driving end and designated row driving end under the drive of the high-voltage signal array, so that an alternating voltage is formed at both ends of the electroluminescent device connected between the designated column driving end and the designated row driving end, thereby generating an alternating electric field through the capacitive coupling of the light-emitting layer of the electroluminescent device, and finally exciting the electroluminescent device at the pixel position to emit light.

[0008] Furthermore, the multi-channel shift register module is implemented using the HV507 chip.

[0009] Furthermore, the processing module is implemented using an ESP32 chip.

[0010] Furthermore, the materials of the electroluminescent array include zinc sulfide (ZnS:Mn) doped with manganese (Mn), zinc sulfide (ZnS:Cu) doped with copper (Cu), strontium sulfate (SrS:Eu) doped with europium (Eu), zinc oxysulfide (CaZnOS:Mn) doped with manganese (Mn), calcium sulfate (CaS:Eu) doped with europium (Eu), and silicon carbide (SiC) powder.

[0011] Furthermore, the processing module receives and parses instruction data from external terminals through its integrated wireless transceiver module.

[0012] Beneficial effects: 1. This invention provides a driving device for a high-voltage AC electroluminescent array. Through the collaborative work of a high-voltage generation module and a multi-channel shift register module, it can achieve efficient, flexible, and miniaturized driving of the electroluminescent array, and has the ability to dynamically adjust parameters and perform multi-channel collaborative control. At the same time, the device of this invention is small in size, making it wearable and enabling flexible application scenarios. Finally, the simplified circuit design of this invention reduces the complexity of external control circuits, lowers hardware costs, and has the advantages of low cost and scalability.

[0013] 2. This invention provides a driving device for a high-voltage AC electroluminescent array. By utilizing the multi-channel parallel output capability of a multi-channel shift register module, any two output ports are defined as a group. Through programming, they are made to alternately output high-voltage signals, thereby directly generating the high-voltage AC power required to drive the electroluminescent device. This eliminates the need for traditional full-bridge / half-bridge circuits, enabling circuit simplification and miniaturization.

[0014] 3. This invention provides a driving device for a high-voltage AC electroluminescent array, which can remotely adjust display parameters and content in real time through wireless control. It features wireless programmability and convenient content updates, thereby improving display quality, reducing power consumption, and is suitable for application scenarios such as wearable devices. Attached Figure Description

[0015] Figure 1 A schematic diagram of the structure of a driving device for a high-voltage AC electroluminescent array provided by the present invention; Figure 2 The data transmission and processing flowchart provided for this invention; Figure 3 This is a schematic diagram of the driving connection of the AC electroluminescent device provided by the present invention. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0017] To address the specific application requirements of "wearable" devices (small size, light weight, and controllable power consumption), this invention provides a driving device for a high-voltage AC electroluminescent array, such as... Figure 1 As shown, it includes a processing module, a multi-channel shift register module, a high-voltage generation module, and an electroluminescent array; wherein, the emission color of the electroluminescent array varies depending on the frequency of the AC signal driving the electroluminescent array; the multi-channel shift register module can be implemented using an HV507 chip, and the processing module can be implemented using an ESP32 chip; The processing module is used to receive and parse instruction data from an external terminal to obtain the target pattern, brightness level, and color parameters. The processing module is also used to adjust the voltage amplitude represented by each element in the high voltage signal array output by the high voltage generation module according to the target pattern and brightness level, and to adjust the frequency of the AC signal output by the multi-channel shift register module according to the color parameters. The multi-channel shift register module is used to output AC signals regularly through each channel under the drive of the high-voltage signal array. The AC signals then drive the corresponding pixels of the electroluminescent array to emit light, thereby completing the display of the target pattern. The amplitude of the AC signal is positively correlated with the voltage amplitude represented by each element in the high-voltage signal array. Pixels corresponding to elements with voltage amplitudes less than a set threshold do not emit light. For pixels corresponding to elements with voltage amplitudes not less than the set threshold, the larger the voltage amplitude, the stronger the light intensity emitted by the corresponding pixel.

[0018] It should be noted that the multi-channel shift register module and the high-voltage generation module are not simply stacked together, but rather form a highly efficient and flexible high-voltage AC drive system through specific functional division and signal interaction.

[0019] Optionally, the multi-channel shift register module is a 64-channel shift register; the electroluminescent array consists of 32×32 electroluminescent devices; like Figure 3 As shown, the output terminals of registers 1-32 of the 64-channel shift register serve as column driving terminals, which are respectively connected to the lower electrodes of the electroluminescent devices in columns 1-32 of the electroluminescent array; the output terminals of registers 33-64 of the 64-channel shift register serve as row driving terminals, which are respectively connected to the upper electrodes of the electroluminescent devices in rows 1-32 of the electroluminescent array. The multi-channel shift register module is used to regularly output AC signals between its designated column driving end and designated row driving end under the drive of the high-voltage signal array, so that an alternating voltage is formed at both ends of the electroluminescent device connected between the designated column driving end and the designated row driving end, thereby generating an alternating electric field through the capacitive coupling of the light-emitting layer of the electroluminescent device, and finally exciting the electroluminescent device at the pixel position to emit light.

[0020] Taking pixel (1,1) as an example, the column driver terminal 1 and row driver terminal 33 of the 64-channel shift register output reverse alternating high and low levels, respectively, forming an alternating voltage difference across pixel (1,1). This generates an alternating electric field through capacitive coupling of the light-emitting layer, thereby exciting the pixel to emit light. The remaining pixels (i,j) all use the same row and column reverse alternating voltage driving logic, combined with frame refresh to achieve dynamic display. By refreshing the output state of the shift register frame by frame, different pixels or pixel combinations can be activated sequentially, thus realizing the display of dynamic patterns.

[0021] Therefore, the high-voltage generation module provides a high-voltage signal to the multi-channel shift register module. Any two output ports of the multi-channel shift register module form a group, alternately outputting high-voltage signals to generate a high-voltage AC signal, driving the AC electroluminescent device to emit light. By selecting multiple groups of regularly outputting high-voltage AC signals, effective driving of the entire AC electroluminescent array can be achieved. The high-voltage generation module employs various topologies and integrated schemes to generate the high-voltage signal, including: non-isolated boost circuits with inductors as the core (such as traditional boost circuits), isolated boost circuits relying on transformers, composite topologies such as SEPIC that can achieve boost functionality, and integrated schemes built using boost-type power management chips.

[0022] It should be noted that after receiving a high-voltage AC signal, the electroluminescent array can emit patterned signals according to different pixels, thereby realizing the information display function. In this invention, alternative materials used to prepare the electroluminescent array include, but are not limited to: zinc sulfide (ZnS:Mn) doped with manganese (Mn), zinc sulfide (ZnS:Cu) doped with copper (Cu), strontium sulfate (SrS:Eu) doped with europium (Eu), zinc oxysulfate (CaZnOS:Mn) doped with manganese (Mn), calcium sulfate (CaS:Eu) doped with europium (Eu), and silicon carbide (SiC) powder, etc. The luminescent characteristics (color, brightness) of different materials are not only determined by their own composition, but can also be dynamically adjusted by the voltage parameters (amplitude, waveform) and frequency parameters of the high-voltage AC, and can be selected according to actual needs.

[0023] Figure 2This is a flowchart illustrating the data transmission, reception, and processing during the operation of this invention. Wireless Command Reception and Parsing Stage: The ESP32 processing module receives command data from external terminals (such as smartphones or cloud servers) in real time via its integrated wireless transceiver module (e.g., Wi-Fi or Bluetooth), parses the commands, and obtains the target pattern, brightness level, and color parameters. Voltage Regulation Stage: The ESP32 processing module dynamically adjusts the voltage amplitude of the output high-voltage signal by adjusting the duty cycle of the charge pin of the LT3468 high-voltage generation module. The high-voltage signal output by the LT3468 high-voltage generation module is directly transmitted to the input terminal of the HV507 multi-channel shift register module. Signal Driving Stage: The ESP32 processing module drives the HV507 multi-channel shift register module to regularly output high-voltage AC signals through its proprietary control protocol, thereby driving the electroluminescent array to complete the patterned display. Brightness and color control stage: By adjusting the output voltage of the high voltage generation module LT3468 chip and the output frequency of the multi-channel shift register module HV507 chip, the brightness and color of the electroluminescent array can be controlled (for electroluminescent materials that emit different colors depending on the driving frequency).

[0024] It should be noted that this invention enables "dynamic intelligent control" through wireless communication. Specifically, by integrating a wireless MCU (such as ESP32), the system can remotely and in real-time receive commands and dynamically adjust the operating parameters (such as voltage, frequency, and output sequence) of the two core modules accordingly. This allows for online reconstruction of brightness, color (for frequency-sensitive materials), and display patterns. This endows traditional electroluminescent displays with a level of intelligence and flexibility not found in traditional electroluminescent displays.

[0025] In summary, the small wearable electronic device of this invention achieves remote, real-time dynamic adjustment of displayed patterns, brightness, and color by employing a highly efficient high-voltage AC electroluminescent array driving method and combining it with the wireless network capabilities of the ESP32 processing module chip. This device not only features low power consumption, high brightness, and high contrast, but also allows for flexible adjustment of displayed content and effects according to actual needs through wireless interaction, making it suitable for various application scenarios such as smartwatches and health monitoring devices. Furthermore, through the wireless transceiver module, the device can interact with external terminals in real time, enabling remote control, status monitoring, and function updates, significantly improving the device's intelligence, adaptability, and user experience.

[0026] Of course, the present invention may have other various embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and modifications according to the present invention, but these corresponding changes and modifications should all fall within the protection scope of the appended claims.

Claims

1. A driving device for a high-voltage AC electroluminescent array, characterized in that The application comprises a processing module, a multi-channel shift register module, a high-voltage generation module, and an electroluminescent array; wherein the frequency of the alternating current signals driving the electroluminescent array is different, and the light-emitting colors of the electroluminescent array are different; The processing module is used for receiving and analyzing instruction data of an external terminal, obtaining a target pattern, a brightness level, and a color parameter; The processing module is also used for adjusting the voltage amplitude represented by each element in the high-voltage signal array output by the high-voltage generation module according to the target pattern and the brightness level, and adjusting the frequency of the alternating current signals output by the multi-channel shift register module according to the color parameter; The multi-channel shift register module is used for regularly outputting alternating current signals between the specified column driving end and the specified row driving end under the driving of the high-voltage signal array, so that an alternating voltage is formed across the electroluminescent devices connected between the specified column driving end and the specified row driving end, an alternating electric field is generated through the capacitive coupling of the light-emitting layer of the electroluminescent device, and finally the electroluminescent device at the pixel position is excited to emit light.

2. A driving device for a high-voltage AC electroluminescent array as claimed in claim 1, characterized in that The multi-channel shift register module is implemented by using an HV507 chip. The processing module is implemented by using an ESP32 chip. The material of the electroluminescent array comprises zinc sulfide doped with manganese (ZnS:Mn), zinc sulfide doped with copper (ZnS:Cu), strontium sulfate doped with europium (SrS:Eu), calcium zinc oxysulfide doped with manganese (CaZnOS:Mn), calcium sulfate doped with europium (CaS:Eu), and silicon carbide (SiC) powder.

3. A driving apparatus for a high voltage AC electroluminescent array as claimed in claim 1, characterized in that, The processing module receives and analyzes the instruction data of the external terminal through the wireless transceiver module integrated therein.

4. A driving apparatus for a high voltage AC electroluminescent array as claimed in claim 1, characterized in that, ​ 5. A driving apparatus for a high voltage AC electroluminescent array as defined in claim 1, characterized in that ​ 6. A driving apparatus for a high voltage AC electroluminescent array as defined in claim 1, characterized in that ​

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