Reference control circuit based on OLED novel luminescent material

Abstract

The invention discloses a reference control circuit based on a novel OLED luminescent material. The reference control circuit comprises a power supply input module, a power supply module, a light source controller module, an I / V amplifier, a voltage stabilizer, a high-precision ADC, an MCU module, an Ethernet module, an RS485 module, a spectrum emission sensor, a spectrum receiving sensor module and a spectrum receiving sensor module. The power supply input module and the power supply module are connected with other modules and provide power supply support for the whole system, the light source controller, the spectrum emission sensor and spectrum receiving sensor module and the MCU module are connected, the I / V amplifier is connected with the spectrum emission sensor and spectrum receiving sensor module, the spectrum receiving sensor module, the voltage stabilizer and the high-precision ADC respectively, and the high-precision ADC is connected with the power supply module. The high-precision ADC is connected with the MCU module, and the Ethernet module and the RS485 module are connected with the MCU module. The spectrum emission sensor and the spectrum receiving sensor are used for data acquisition, and the MCU is used for data processing and logic control, so that the circuit is controlled.

Description

Technical Field

[0001] The invention relates to the technical field of reference control circuits for novel luminescent materials, and in particular to a reference control circuit based on novel OLED luminescent materials. Background Art

[0002] With the gradual increase in the application of OLED materials, there are few reference circuits for high-precision control of new OLED light-emitting materials on the market. The control channels are single, the dimming mode is single, the accuracy is insufficient, the circuit is sensitive to temperature, and the practicability is not strong. The present invention focuses on solving these problems, including supporting up to 22 channels, supporting both PWM and DC dimming technologies, high-precision resolution of the acquisition control part, and reference control circuits for temperature calibration. In the prior art, most of them can only achieve separate PWM or DC dimming, and the accuracy is not high. There are few solutions that support 22 channels lighting up at the same time with different frequencies, and the volume is also relatively large. In addition, in terms of data processing, the prior art cannot support the rapid processing of 22 channels of data at the same time, resulting in the disadvantage of insufficient acquisition speed. In order to solve the above problems, the present invention controls the lighting of the luminescent material, including PWM dimming control and DC analog dimming control, wherein the spectral corresponding range of the new OLED luminescent material is 255nm-1650nm, with a total of 22 multi-channel OLED points, and the design of the response circuit of the new OLED luminescent material, including a single-channel response circuit design, which is used to offset the impact of temperature fluctuations on the overall performance through a certain algorithm. In addition, the power management module part meets the intrinsic safety explosion-proof requirements, so that the circuit can be applied to the application scenarios of industrial explosion-proof requirements. Data is being uploaded, and 2 links are provided, including an Ethernet communication module and an RS485 communication module. A reference control circuit based on a new OLED luminescent material is proposed. Summary of the invention

[0003] In view of the shortcomings of the existing technology, the present invention provides a reference control circuit based on a new OLED light-emitting material, aiming to solve the problems of the existing technology that can only use PWM or DC dimming independently, the dimming accuracy is not high, the firmware volume is relatively large, and the data processing and data acquisition speeds are slow. A high-precision and multi-functional light source controller is used to solve the problems of PWM or DC independent dimming and insufficient dimming accuracy.

[0004] In order to achieve the above technical effects, the present invention adopts the following technical solutions:

[0005] A reference control circuit based on a novel OLED light-emitting material, comprising:

[0006] The reference control circuit based on the new OLED light-emitting material consists of 12 parts, namely, power input module, explosion-proof power module, light source controller module, I / V amplifier, voltage regulator, high-precision ADC, MCU module, Ethernet module, RS485 module, spectral emission sensor and spectral receiving sensor module, and spectral receiving sensor module.

[0007] ①Power input module: This module is the power input part and supports DC 12V power supply.

[0008] ② Explosion-proof management power supply module: The core function of this module is to convert the 12V DC voltage of the power input into the voltage required by each internal module.

[0009] ③ Light source controller module: This module supports PWM dimming control and DC analog dimming control, and supports Control of the mid-spectrum emission sensor NT2000.

[0010] The light source controller module ③ supports both PWM dimming control and DC analog dimming control to meet the dimming requirements of different needs.

[0011] ④I / V amplifier: The function of this module is to convert the weak photocurrent sensed by the spectrum receiving sensor NT200G into a voltage signal.

[0012] ⑤ Voltage regulator: This module provides highly stable 2.5V voltage power supply to ④⑥I / V amplifier and ⑦ high-precision ADC module.

[0013] ⑥I / V amplifier: The function of this module is to convert the weak photocurrent sensed by the spectrum receiving sensor NT200G into a voltage signal.

[0014] ⑦ High-precision ADC module: This module is connected to the I / V amplifier module in the front stage, which converts the weak photocurrent sensed by the spectral receiving sensor NT200G into a voltage signal for data collection.

[0015] ⑧MCU module: This module is the core data processing and logic control unit and is the core of the system.

[0016] ⑨ Ethernet module: The Ethernet communication module for upstream communication uses TCP / IP protocol and is connected to communication equipment with Ethernet interface.

[0017] ⑩RS485 module: RS485 communication module for upstream communication, using MODBUS protocol, and connecting to communication equipment with RS485 interface.

[0018] Spectral emission sensor and spectral receiving sensor module: This module consists of 2 parts: 4 spectral emission sensors and 1 spectral receiving sensor. The reason for using 4 spectral emission sensors is to increase the intensity of the light source and meet more usage scenarios.

[0019] The spectrum emission sensor and spectrum receiving sensor module The module consists of 2 parts: 4 spectral emission sensors and 1 spectral receiving sensor, which increases the upper limit of light source intensity and meets more usage requirements.

[0020] Spectral receiving sensor module: This sensor is a photoelectric conversion sensor that responds in the UV-VIS (CMOS) and NIR regions (InGaAs). It is used to detect the complementary metal oxide semiconductor (CMOS) window of photons in the UV-Vis region (200-950nm) and the indium gallium arsenide (InGaAs) window for detecting photons in the NIR region (950-1700nm). That is, it can respond to the light signal emitted by the spectral emission sensor.

[0021] The spectrum receiving sensor module It is a photoelectric conversion sensor that responds in the UV-VIS (CMOS) and NIR regions (InGaAs). This is a key reference receiving part. Through this data, the practical problem of temperature drift can be effectively solved.

[0022] The present invention is different from the prior art in that:

[0023] 1. From the lighting control of the luminescent material, PWM dimming control and DC analog dimming control can be realized at the same time.

[0024] 2. Support 22 channels lighting up at the same time with different frequencies.

[0025] 3. In terms of data processing, the main controller MCU can process these data quickly at the same time, with a fast collection speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings in the following descriptions include some examples of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0027] Figure 1 The overall structure diagram of the reference control circuit based on the new OLED light-emitting material.

[0028] The numbers in the figure are: ① is the power input module, ② is the explosion-proof power module, ③ is the light source controller module, ④ is the I / V amplifier, ⑤ is the voltage regulator, ⑥ is the I / V amplifier, ⑦ is the high-precision ADC module, ⑧ is the MCU module, ⑨ is the Ethernet module, ⑩ is the RS485 module, It is a spectrum transmitting sensor and a spectrum receiving sensor module. It is a spectrum receiving sensor module. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1

[0031] ①Power input module: This module is the power input part and supports DC 12V power supply. At the same time, the module has anti-reverse connection, overvoltage protection and overcurrent protection functions, which plays a certain safety protection role for the entire circuit.

[0032] ② Explosion-proof management power supply module: The core function of this module is to convert the 12V DC voltage of the power input into the voltage required by each internal module, including 3.3V, 5V, 7V, etc. The modules receiving power include light source controller module, I / V amplifier, voltage regulator, high-precision ADC, MCU module, Ethernet module, RS485 module, spectrum emission sensor and spectrum receiving sensor module, spectrum receiving sensor module. In addition, the design of this circuit complies with the intrinsic safety explosion-proof standard, the specific standard is Ex ibIIC T6 Gb, and can be used in most chemical plants with explosive gases, except coal mines (coal mines are Class I equipment, Class I is larger than our existing Class II).

[0033] ③ Light source controller module: This module supports PWM dimming control and DC analog dimming control, and supports The control of the medium spectrum emission sensor NT2000 is specifically manifested as: the optional maximum 16-bit PWM dimming can be divided into four levels: 256, 1024, 4096 and 65536, and the 4 levels correspond to the PWM dimming frequencies: 256 level: 62kHz / 32kHz / 4kHz / 2kHz / 1kHz / 0.5kHz / 244Hz / 122Hz; 1024 level: 16kHz / 8kHz / 1kHz / 0.5kHz / 244Hz / 122Hz; 4096 level: 4kHz / 2kHz / 244Hz / 122Hz; 65536 level: 244Hz / 122Hz. At the same time, the module supports 8-bit 256-level DC analog dimming, and has good dimming control for the spectrum emission sensor NT2000 made of new OLED luminescent materials. Different dimming modes can be selected according to the different light intensities required in different scenes. It can support independent PWM dimming, independent DC dimming, and mixed dimming of the two. As for frequency selection, the main consideration is the chip performance of the ⑧MCU module. The core component of this module is the chip controller IS31FL3239.

[0034] ④I / V amplifier: The function of this module is to convert the weak photocurrent sensed by the spectral receiving sensor NT200G into a voltage signal, and provide it to the next-level high-precision ADC for collection. The voltage signal range must be controlled within 2.5V.

[0035] ⑤ Voltage regulator: This module provides a highly stable 2.5V voltage supply to ④⑥I / V amplifier and ⑦ high-precision ADC module to ensure high stability and reliability of the signal conversion process, and also serves as a reference voltage for data acquisition.

[0036] ⑥I / V amplifier: The function of this module is to convert the weak photocurrent sensed by the spectrum receiving sensor NT200G into a voltage signal, and provide it to the next-level high-precision ADC for collection. The voltage signal range must be controlled within 2.5V.

[0037] ⑦ High-precision ADC module: This module is connected to the I / V amplifier module in the front stage, which converts the weak photocurrent sensed by the spectrum receiving sensor NT200G into a voltage signal for data acquisition. It is an analog signal, which becomes a digital signal after internal conversion. The back stage is connected to the ⑧ MCU module for data processing and logic control. The core component of this module is the MCU chip NRF52840.

[0038] ⑧MCU module: This module is the core data processing and logic control unit, which is the core of the system. Its main functions are: controlling the light source controller module through the I2C interface, and then controlling the light source; digitally processing the digital signal from the high-precision ADC module; connecting the Ethernet module ⑨, and communicating the specific data protocol information through the Ethernet module; connecting the RS485 module, and communicating the specific data protocol information through the RS485 module. It should be noted that the two ways of communication are mainly compatible considering the actual application environment and the differences in docking equipment, and the circuit can be applied to more application scenarios.

[0039] ⑨ Ethernet module: The Ethernet communication module for upstream communication uses TCP / IP protocol and is connected to communication equipment with Ethernet interface.

[0040] ⑩RS485 module: RS485 communication module for upstream communication, using MODBUS protocol, and connecting to communication equipment with RS485 interface.

[0041] Spectral emission sensor and spectral receiving sensor module: This module consists of 2 parts: 4 spectral emission sensors and 1 spectral receiving sensor. The reason for using 4 spectral emission sensors is to increase the intensity of the light source and meet more usage scenarios. The following is a detailed introduction to these two parts. Spectral emission sensor: This sensor is a miniature broadband UV-VIS-NIR spectral sensor made based on OLED new luminescent materials. The sensor integrates ultraviolet luminescent materials (such as metal oxides) and visible-near infrared luminescent materials (such as organic matter or complexes) on a specially designed semiconductor chip with a micro-control circuit. The sensor has three main components: 1. A gold-plated aluminum nitride ceramic substrate frame; 2. Emitter: a series of ultraviolet wavelength luminescent areas (200-400nm), a series of visible light wavelength luminescent areas (400-800nm) coated with organic luminescent materials, and a series of near-infrared wavelength luminescent areas (800-1700nm) coated with organic luminescent materials; 3. A microcircuit for controlling luminescence / detection with a time-series Fourier transform filter to remove environmental noise and separate the signal from the modulated emitter. This highly compact integrated sensor provides fast, stable and repeatable spectral array data covering the entire wavelength range from 200 to 1700nm. The sensor can provide a miniature, highly compact and wide wavelength range coverage for any spectral sensing application scenario. Spectral receiving sensor: This sensor is a photoelectric conversion sensor that responds in the UV-VIS (CMOS) and NIR regions (InGaAs), a complementary metal oxide semiconductor (CMOS) window for detecting photons in the UV-Vis region (200-950nm) and an indium gallium arsenide (InGaAs) window for detecting photons in the NIR region (950-1700nm), that is, it can respond to the light signal emitted by the spectral emission sensor. Among them, the spectral emission sensor is controlled by the ③ light source controller module, and the spectral receiving sensor is connected to the ④⑥I / V amplifier.

[0042] Spectral receiving sensor module: This sensor is a photoelectric conversion sensor that responds in the UV-VIS (CMOS) and NIR regions (InGaAs). It is used to detect the complementary metal oxide semiconductor (CMOS) window of photons in the UV-Vis region (200-950nm) and the indium gallium arsenide (InGaAs) window of photons in the NIR region (950-1700nm), that is, it can respond to the light signal emitted by the spectral emission sensor. Among them, the spectral emission sensor is controlled by the ③ light source controller module, and the spectral receiving sensor is connected to the ④⑥I / V amplifier. It is particularly noted that this module is very necessary because it can receive the light source signal that has not passed through the object being detected, that is, the original light source signal. If the ambient temperature changes and affects the data acquisition, the temperature change can be corrected through a specific software algorithm, thereby achieving a high degree of reliability and stability.

[0043] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these specific embodiments are only examples, and those skilled in the art may omit, replace and change the details of the above methods and systems in various ways without departing from the principles and essence of the present invention. For example, merging the above method steps so as to perform substantially the same functions in substantially the same way to achieve substantially the same results is within the scope of the present invention.

[0044] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure should be limited by the appended claims.

Claims

1. A reference control circuit based on a new OLED light-emitting material, characterized in that: Include: ①Power input module: This module is the power input part and supports DC 12V power supply. ② Explosion-proof management power supply module: The core function of this module is to convert the 12V DC voltage of the power input into the voltage required by each internal module. ③ Light source controller module: This module supports PWM dimming control and DC analog dimming control, and supports Control of the mid-spectrum emission sensor NT2000. ④I / V amplifier: The function of this module is to convert the weak photocurrent sensed by the spectrum receiving sensor NT200G into a voltage signal. ⑤ Voltage regulator: This module provides highly stable 2.5V voltage power supply to ④⑥I / V amplifier and ⑦ high-precision ADC module. ⑥I / V amplifier: The function of this module is to convert the weak photocurrent sensed by the spectrum receiving sensor NT200G into a voltage signal. ⑦ High-precision ADC module: This module is connected to the I / V amplifier module in the front stage, which converts the weak photocurrent sensed by the spectral receiving sensor NT200G into a voltage signal for data collection. ⑧MCU module: This module is the core data processing and logic control unit and is the core of the system. ⑨ Ethernet module: The Ethernet communication module for upstream communication uses TCP / IP protocol and is connected to communication equipment with Ethernet interface. ⑩RS485 module: RS485 communication module for upstream communication, using MODBUS protocol, and connecting to communication equipment with RS485 interface. Spectral emission sensor and spectral receiving sensor module: This module consists of 2 parts: 4 spectral emission sensors and 1 spectral receiving sensor. The reason for using 4 spectral emission sensors is to increase the intensity of the light source and meet more usage scenarios. Spectral receiving sensor module: This sensor is a photoelectric conversion sensor that responds in the UV-VIS (CMOS) and NIR regions (InGaAs). It is used to detect the complementary metal oxide semiconductor (CMOS) window of photons in the UV-Vis region (200-950nm) and the indium gallium arsenide (InGaAs) window for detecting photons in the NIR region (950-1700nm). That is, it can respond to the light signal emitted by the spectral emission sensor.

2. The reference control circuit based on the new OLED light-emitting material according to claim 1, characterized in that: The light source controller module ③ supports both PWM dimming control and DC analog dimming control to meet the dimming requirements of different needs.

3. The reference control circuit based on the new OLED light-emitting material according to claim 1, characterized in that: The spectrum emission sensor and spectrum receiving sensor module The module consists of 2 parts: 4 spectral emission sensors and 1 spectral receiving sensor, which increases the upper limit of light source intensity and meets more usage requirements.

4. The reference control circuit based on the novel OLED light-emitting material according to claim 1, characterized in that: The spectrum receiving sensor module It is a photoelectric conversion sensor that responds in the UV-VIS (CMOS) and NIR regions (InGaAs). This is a key reference receiving part. Through this data, the practical problem of temperature drift can be effectively solved.

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