CN114005406A - OLED display circuit - Google Patents
OLED display circuit Download PDFInfo
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- CN114005406A CN114005406A CN202111267127.6A CN202111267127A CN114005406A CN 114005406 A CN114005406 A CN 114005406A CN 202111267127 A CN202111267127 A CN 202111267127A CN 114005406 A CN114005406 A CN 114005406A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 238000005192 partition Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 9
- 150000002500 ions Chemical class 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/027—Arrangements or methods related to powering off a display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses an OLED display circuit, which comprises a reset circuit, two LDO power conversion circuits, a bus driving circuit, a light emitting diode and an OLED display module circuit, wherein the two LDO power conversion circuits are connected with the reset circuit; one LDO power conversion circuit is used for carrying out current-limiting power supply on the reset circuit and the bus driving circuit; the other path of LDO power supply conversion circuit is used for independently limiting the current and supplying power to the OLED display module circuit; the input end of the reset circuit is connected with the processor, the output end of the reset circuit is connected with the input end of the bus driving circuit, and the output end of the bus driving circuit is respectively connected with the positive end of the light emitting diode and the input end of the OLED display module circuit; when the LED works normally, the LED is normally on; when the OLED display module has latch-up undervoltage, the light emitting diode flickers. Based on a space anti-irradiation design technology, a space OLED display application circuit design technology is successfully developed and applied to a domestic space station astronaut operation force measuring instrument, the space OLED display application circuit is resistant to the influence of space high-energy ions, and the application requirements of a space station are met.
Description
Technical Field
The invention belongs to the technical field of electronics, and particularly belongs to an OLED display circuit.
Background
The operating force measuring instrument with the friendly display interface is equipped in the space station, and in the flight task of the space station for over ten years in orbit, the astronauts regularly use the operating force measuring instrument to measure various operating forces of hands and feet, so that the operating force of the astronauts is monitored for a long time, and the astronauts are guaranteed to complete the work task of the space station satisfactorily.
The OLED is a commercial interface-friendly advanced display technology, but the commercial OLED display technology does not have anti-irradiation performance and cannot be directly applied to a space station measuring instrument, otherwise equipment can be broken down or even damaged due to the influence of a single event effect, and therefore the existing OLED display technology cannot be applied to a space station.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an OLED display circuit, which is based on a space anti-irradiation design technology, successfully develops a space OLED display application circuit design technology, is successfully applied to a domestic space station astronaut operation force measuring instrument, is resistant to the influence of space high-energy ions, is friendly in interface and meets the application requirements of a space station.
In order to achieve the purpose, the invention provides the following technical scheme:
an OLED display circuit comprises a reset circuit, two LDO power conversion circuits, a bus driving circuit, a light emitting diode and an OLED display module circuit;
one LDO power conversion circuit is used for carrying out current-limiting power supply on the reset circuit and the bus driving circuit; the other path of LDO power supply conversion circuit is used for independently limiting the current and supplying power to the OLED display module circuit;
the input end of the reset circuit is connected with the processor, the output end of the reset circuit is connected with the input end of the bus driving circuit, and the output end of the bus driving circuit is respectively connected with the positive end of the light emitting diode and the input end of the OLED display module circuit;
when the LED works normally, the LED is normally on; when the OLED display module has latch-up undervoltage, the light emitting diode flickers.
Preferably, the reset circuit is a CAST stage JR706 RD;
the power supply pin of the reset circuit is connected with the processor and the partition power supply 3.3V 1; the input pin WDI is connected with a general output pin 3.3V _ OUT1 of the processor; the WDO pin is connected with the reset input pin/MR; the reset output pin/RST is respectively connected with a processor reset 3.3VCPU _ RST and a bus driving circuit;
the power supply 3.3V2 of the OLED display module is connected with a reset circuit pin PFI after voltage division through resistors R1 and R2, and an output pin PFO is connected with a processor falling edge interrupt pin 3.3VCPU _ INT; the output pin GND is grounded.
Preferably, the LDO power conversion circuit is an aerospace-grade LW5230 conversion module, and the LW5230 conversion module is connected in series with a current-limiting resistor and is used for converting +5 VCC.
Preferably, the LDO power conversion circuits are all connected in series with a current-limiting resistor of 0.5 omega/1W.
Preferably, the bus driving circuit is an aerospace level bus transmitter B54AC244, the power supply pin is connected to 3.3V1, the interface AO is connected to the reset circuit, the interface a1 and the interface a2 are respectively connected to the processor general output pin 3.3VCPU _ OUT2 and 3.3VCPU _ OUT3, the interface A3, the interface a4 and the interface a5 are respectively connected to the chip select signal 3.3VCPU _ SPICS, the clock signal 3.3VCPU _ SPICLK and the data output signal 3.3VCPU _ SPIOUT of the processor SPI interface, the interface a6 and the interface a7 are both grounded, the interface Y1 is connected in series to the positive terminal of the photodiode after being connected in series with the current limiting resistor, and the interface Y0, the interface Y2, the interface Y3, the interface Y4 and the interface Y5 are respectively connected in series with the RES pin, the D/C pin, the D0 and the D1 of the OLED display module circuit after being connected in series with the current limiting resistor.
Preferably, a 51 Ω resistor is connected in series to a connection line between the bus driving circuit and the OLED display module circuit.
Preferably, the light emitting diode is an aerospace grade BT702R diode, the positive end of the aerospace grade BT702R diode is connected with the bus driving circuit through a current limiting resistor, and the negative end of the aerospace grade BT702R diode is grounded.
Preferably, the OLED display module circuit is an aerospace grade V0082-BH-070, pins BS0, BS1, RD, R/'W, B3, B4, B5, B6 and B7 of the OLED display module circuit are all grounded, pins RES, D/' C, CS, D0 and D1 are all connected to the bus driving circuit through series resistors, and a power supply pin VDD is connected to 3.3V 2.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the OLED display circuit, two LDO power supply conversion circuits are used for supplying power in a partition mode, the voltage of the LDO power supply conversion circuits is monitored by the hardware of the reset circuit, if the voltage of the latch power supply is larger, the hardware of the reset circuit is reduced to generate an interrupt signal, the processor receives the interrupt signal and software to set an indicator lamp to flash and warn, an operator can immediately turn off the main power supply of operating force equipment, the phenomenon that an OLD display module is damaged by space single event effect is avoided, the anti-irradiation performance is improved, and the reliability of products is improved. The invention is suitable for the application environment of the space station, adopts the anti-irradiation design technology, greatly improves the space adaptability, ensures the long-term high reliability to be used in the space station, and fully completes the task of detecting and displaying the operating force of the space station to the astronaut for a long time.
Drawings
FIG. 1 is a schematic block diagram of an OLED display application circuit of an aerospace nationwide chemical component of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to be illustrative, but not limiting, of the invention.
As shown in fig. 1, an OLED display circuit includes a reset circuit, a two-way LDO power conversion circuit, a bus driving circuit, a light emitting diode, and an OLED display module circuit.
One LDO power conversion circuit is used for carrying out current-limiting power supply on the reset circuit and the bus driving circuit; and the other path of LDO power supply conversion circuit is used for independently limiting the current and supplying power to the OLED display module circuit.
The input end of the reset circuit is connected with the processor, the output end of the reset circuit is connected with the input end of the bus driving circuit, and the output end of the bus driving circuit is respectively connected with the input end of the light emitting diode and the input end of the OLED display module circuit. In the power-on reset process, the power supply voltage is less than the reset threshold value by 2.63V, the output of the reset/RST signal is low, and then the power supply voltage is greater than the reset threshold value by 2.63V, and the output of the reset/RST signal is high after about 200ms of low; resetting under power failure or under voltage, wherein if the power supply voltage for normal power supply is in power failure or under voltage is less than the reset threshold value of 2.63V, the output of the reset/RST signal is low, and if the voltage rises again and exceeds the reset threshold value/the output of the RST signal for about 200ms, the output of the RST signal is high; the manual reset/MR signal is low, the reset/RST signal output is low, and the reset/RST signal output goes high about 200ms after the/MR signal changes; in about 1.6s period after reset/RST signal output is high, if the watchdog WDI input signal is not low, the watchdog WDO output signal becomes low; and (4) detecting by a power supply, if the voltage of the PFI input signal is lower than 1.25V, the PFO output signal is low, otherwise, the PFO output signal is high.
The reset circuit selects domestic CAST grade JR706RD, and the reset circuit or the processor monitoring circuit is used for electrifying, power failure and undervoltage, manually generating a processor reset negative pulse signal, and generating a low signal or a negative pulse signal when detecting that the power supply voltage is lower than a threshold value. The power supply pin is connected with a 3.3V1 power supply of the same partition of the processor; the input pin WDI of the watchdog is connected with the general output pin 3.3V _ OUT1 of the processor; the output pin WDO of the watchdog is connected with the reset input pin/MR; the reset output pin/RST is respectively connected with the processor reset 3.3VCPU _ RST and the input pin A0 of the bus driver B54AC 244; the OLED display module power supply 3.3V2 is divided by resistors R1 and R2 and then connected to a reset circuit pin PFI (threshold voltage 1.25V), and two voltage dividing resistors R1 and R2: connecting a power supply 3.3V2 resistor R1: 91K omega, grounding resistance R2:100K omega, the divider resistance can monitor the power supply state (PFO output is low) that the display module power supply 3.3V2 is lower than the minimum voltage 2.4V, the output pin PFO is connected with the processor falling edge interrupt pin 3.3VCPU _ INT; the design circuit has the functions of power-on reset, power-off reset and watchdog reset, can automatically detect the condition that the power supply of the OLED display module is lower than the minimum voltage of 3.3V2 through hardware, triggers the processor to interrupt and set the light-emitting diode to continuously flicker in real time, and reminds astronauts of immediately powering off to avoid the damage of the latch of the OLED module.
The two LDO power supply conversion circuits adopt a domestic aerospace-level LW5230 module and are used for converting a high-voltage power supply into a low-voltage power supply at a low voltage difference, for example, a 5V power supply is converted into a 3.3V power supply to supply power for the low-voltage power supply circuit. The LDO power supply conversion circuits convert +5VCC, after each LDO power supply conversion circuit is connected with a 0.5 omega/1W current-limiting resistor in series, one path of the LDO power supply conversion circuit carries out current-limiting power supply on the processor, the reset circuit and the driving circuit, and the other path of the LDO power supply conversion circuit independently carries out current-limiting power supply on the OLED display module.
The bus driving circuit selects a domestic aerospace level bus transmitter B54AC244, and the bus driving circuit is used for providing required current for a signal of a rear-stage load circuit. The power supply pins are connected with 3.3V1, AO is connected with a reset signal, A1 and A2 are respectively connected with a processor universal output pin 3.3VCPU _ OUT2 and 3.3VCPU _ OUT3, A3, A4 and A5 are respectively connected with a chip selection signal 3.3VCPU _ SPICS, a clock signal 3.3VCPU _ SPICLK and a data output signal 3.3VCPU _ SPIOUT of a processor SPI interface, A6 and A7 are all grounded, Y1 is connected with a 330 omega current limiting resistor in series and then connected with the positive end of a light-emitting diode, and Y0, Y2, Y3, Y4 and Y5 pins are respectively connected with RES, D/C, CS, D0 and D1 pins of an OLED display module circuit after being connected with a 51 omega resistor in series.
The light-emitting diode is made of domestic aerospace grade BT702R, is green, the positive end of the light-emitting diode is connected with a 330 omega current-limiting resistor, the negative end of the light-emitting diode is grounded, the light-emitting diode is normally on when the operating force tester normally operates, and the light-emitting diode flickers when the OLED display module is in latch undervoltage.
The OLED display module circuit is made of domestic aerospace grade V0082-BH-070, is green and is used for displaying figures with simple numbers and characters. By adopting SPI interface design, the pins BS0, BS1, RD, R/'W, B3, B4, B5, B6 and B7 are all grounded, the pins RES, D/' C, CS, D0 and D1 are all respectively connected with the pins Y0, Y2, Y3, Y4 and Y5 of B54AC244 through serially connecting 51 omega resistors, and the power supply pin VDD is connected with 3.3V 2.
The normal OLED display module circuit on the operating force measuring instrument displays a test option interface for testing and selecting by astronauts, and the light-emitting diode is also normally on; if the self-checking is wrong, displaying corresponding self-checking warning information to remind the astronaut to perform corresponding processing; if the OLED display screen has single particle latch in the test process, the light emitting diode flickers to remind the astronaut to power off immediately.
All components of the OLED display circuit adopt domestic components: and domestic components are selected, so that the reliability of the product is improved, the autonomous controllable degree of the components is improved, and the huge risk that subsequent products cannot be produced due to 'sale prohibition' of the selected imported high components is avoided.
According to the OLED display circuit, power is supplied in a partition mode, the reset circuit hardware monitors the conversion voltage of the LDO circuit LW5230, if the latch power supply voltage is large, the reset circuit hardware generates an interrupt signal, the processor receives interrupt signal software to set an indicator lamp to flash for warning, an operator can immediately turn off the main power supply of the operating force equipment, the OLD display module is prevented from being damaged by the space single event effect, and the anti-irradiation performance is improved.
The invention relates to a design method of an OLED display circuit of aerospace nationwide produced components, which is applied to operating force measuring equipment of a space station in China launched in 2021, wherein in the flying process of the space station, an astronaut regularly uses the equipment to measure various operating forces, the OLED display circuit displays test parameters, measurement results and alarm information set by the astronaut with high reliability, and the astronaut can master the operating state of the operating force measuring equipment in time and ensure the satisfactory completion of the operating force measuring task of the space station.
The OLED display circuit is applied to an operating force measuring instrument for space station astronauts, the astronauts working and living for a long time regularly measure various operating forces of hands and feet by using the operating force measuring instrument for the astronauts in orbit in the flight mission for ten years, and the OLED display circuit is friendly in interface and displays the astronauts, the operating modes, the operating force types, the operating force sizes and various warning information with high reliability. The astronaut sets and operates the instrument to measure the operating force according to the prompt of the display screen, the measurement result is stored and transmitted to the medical monitoring equipment host for analysis, health guidance is provided for the astronaut, the astronaut is guaranteed to fully complete the long-term on-orbit work task of the space station, and many devices for manned spaceflight need to design an OLED display technology with friendly and advanced interfaces, so that the technology can provide beneficial reference for the development of other manned spaceflight devices needing OLED display screens.
Claims (8)
1. The OLED display circuit is characterized by comprising a reset circuit, two LDO power conversion circuits, a bus driving circuit, a light emitting diode and an OLED display module circuit;
one LDO power conversion circuit is used for carrying out current-limiting power supply on the reset circuit and the bus driving circuit; the other path of LDO power supply conversion circuit is used for independently limiting the current and supplying power to the OLED display module circuit;
the input end of the reset circuit is connected with the processor, the output end of the reset circuit is connected with the input end of the bus driving circuit, and the output end of the bus driving circuit is respectively connected with the positive end of the light emitting diode and the input end of the OLED display module circuit;
when the LED works normally, the LED is normally on; when the OLED display module has latch-up undervoltage, the light emitting diode flickers.
2. An OLED display circuit as claimed in claim 1, wherein the reset circuit is a CAST stage JR706 RD;
the power supply pin of the reset circuit is connected with the processor and the partition power supply 3.3V 1; the input pin WDI is connected with a general output pin 3.3V _ OUT1 of the processor; the WDO pin is connected with the reset input pin/MR; the reset output pin/RST is respectively connected with a processor reset 3.3VCPU _ RST and a bus driving circuit;
the power supply 3.3V2 of the OLED display module is connected with a reset circuit pin PFI after voltage division through resistors R1 and R2, and an output pin PFO is connected with a processor falling edge interrupt pin 3.3VCPU _ INT; the output pin GND is grounded.
3. The OLED display circuit of claim 1, wherein the LDO power conversion circuit is an aerospace class LW5230 conversion module, and the LW5230 conversion module is connected in series with a current limiting resistor for converting +5 VCC.
4. The OLED display circuit of claim 1, wherein the LDO power conversion circuits are all connected in series with a current limiting resistor of 0.5 Ω/1W.
5. The OLED display circuit of claim 1, wherein the bus driver circuit is an aerospace bus transmitter B54AC244, the power supply pin is connected to 3.3V1, the interface AO is connected to the reset circuit, the interface A1 and the interface A2 are respectively connected to the general output pins 3.3VCPU _ OUT2 and 3.3VCPU _ OUT3 of the processor, the interface A3, the interface A4 and the interface A5 are respectively connected to the chip select signal 3.3VCPU _ SPICS of the SPI interface of the processor, the clock signal 3.3VCPU _ SPICLK and the data output signal 3.3VCPU _ SPIOUT, the interface A6 and the interface A7 are all grounded, the interface Y1 is connected in series to the positive terminal of the light emitting diode, the interface Y0, the interface Y2, the interface Y3, the interface Y48 and the interface Y5 are respectively connected in series to the RES pin, the RESC pin, the D596 pin and the D2D pin of the OLED display module circuit after being connected in series to the resistor.
6. The OLED display circuit of claim 1, wherein a 51 Ω resistor is connected in series to the bus driver circuit and the OLED display module circuit.
7. The OLED display circuit of claim 1, wherein the light emitting diode is an aerospace grade BT702R diode, the positive terminal of the aerospace grade BT702R diode is connected to the bus driving circuit through a current limiting resistor, and the negative terminal of the aerospace grade BT702R diode is grounded.
8. The OLED display circuit of claim 1, wherein the OLED display module circuit is aerospace V0082-BH-070, pins BS0, BS1, RD, R/. W, B3, B4, B5, B6 and B7 of the OLED display module circuit are all grounded, pins RES, D/. C,. CS, D0 and D1 are all connected with the bus driving circuit through series resistors, and a power supply pin VDD is connected with 3.3V 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267127.6A CN114005406A (en) | 2021-10-28 | 2021-10-28 | OLED display circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111267127.6A CN114005406A (en) | 2021-10-28 | 2021-10-28 | OLED display circuit |
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| Publication Number | Publication Date |
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| CN114005406A true CN114005406A (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111267127.6A Pending CN114005406A (en) | 2021-10-28 | 2021-10-28 | OLED display circuit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202243035U (en) * | 2011-09-30 | 2012-05-30 | 湖北航天技术研究院特种车辆技术中心 | Vehicle-mounted information display system |
| CN205751470U (en) * | 2016-04-29 | 2016-11-30 | 天津昊天伟业电子科技有限公司 | A kind of LED display containing independent blanking signal display control program |
| CN206757345U (en) * | 2017-04-20 | 2017-12-15 | 广东高云半导体科技股份有限公司 | A kind of industry screen display control circuit |
| CN108235498A (en) * | 2016-12-22 | 2018-06-29 | 重庆品鉴光电照明有限公司 | Free-standing solar LED lighting circuit |
| CN111212500A (en) * | 2018-11-22 | 2020-05-29 | 广州市皓品信息科技有限公司 | Isolated LED light source control circuit |
| CN113380167A (en) * | 2021-06-15 | 2021-09-10 | 西安微电子技术研究所 | Aerospace-grade nixie tube display driving circuit and application thereof |
-
2021
- 2021-10-28 CN CN202111267127.6A patent/CN114005406A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202243035U (en) * | 2011-09-30 | 2012-05-30 | 湖北航天技术研究院特种车辆技术中心 | Vehicle-mounted information display system |
| CN205751470U (en) * | 2016-04-29 | 2016-11-30 | 天津昊天伟业电子科技有限公司 | A kind of LED display containing independent blanking signal display control program |
| CN108235498A (en) * | 2016-12-22 | 2018-06-29 | 重庆品鉴光电照明有限公司 | Free-standing solar LED lighting circuit |
| CN206757345U (en) * | 2017-04-20 | 2017-12-15 | 广东高云半导体科技股份有限公司 | A kind of industry screen display control circuit |
| CN111212500A (en) * | 2018-11-22 | 2020-05-29 | 广州市皓品信息科技有限公司 | Isolated LED light source control circuit |
| CN113380167A (en) * | 2021-06-15 | 2021-09-10 | 西安微电子技术研究所 | Aerospace-grade nixie tube display driving circuit and application thereof |
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Application publication date: 20220201 |