CN106960647B - Energy-saving light-emitting nixie tube display driving circuit - Google Patents
Energy-saving light-emitting nixie tube display driving circuit Download PDFInfo
- Publication number
- CN106960647B CN106960647B CN201710375049.9A CN201710375049A CN106960647B CN 106960647 B CN106960647 B CN 106960647B CN 201710375049 A CN201710375049 A CN 201710375049A CN 106960647 B CN106960647 B CN 106960647B
- Authority
- CN
- China
- Prior art keywords
- circuit
- driving
- segment
- nixie tube
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
- G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
- G09G3/12—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using electroluminescent elements
- G09G3/14—Semiconductor devices, e.g. diodes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
An energy-saving luminous nixie tube display driving circuit relates to a luminous nixie tube. The device is provided with a serial interface module and a segment driving module; the serial interface module is used for communicating with an external control chip and comprises a reset circuit, a command decoding circuit and a display storage circuit, wherein the reset circuit is used for timing the low level state of a clock pin SCK, and when the time that the SCK is continuously at the low level exceeds a set value, a reset signal rstb is valid; when the SCK is changed from a low level to a high level, the reset signal rstb is invalid; the external control chip transmits a command to the chip, and the command decoding circuit decodes the input command; the display memory circuit is used for storing the display data output by the command decoding circuit; the segment driving module is used for generating a driving waveform, comprises a segment selection driver, a bit selection driver and the like, inputs of the segment selection driver and the bit selection driver are driving waveform WAVE and display data, and the segment driving module is used for driving the LED nixie tube in a dynamic scanning mode.
Description
Technical Field
The invention relates to a luminous nixie tube, in particular to an energy-saving luminous nixie tube display driving circuit.
Background
The LED nixie tube display driving control circuit mainly adopts two modes, namely static scanning and dynamic scanning, wherein the static scanning means that each segment of each nixie tube is independently controlled, and for example, 8 segments of nixie tubes with 16 bits are displayed, 8 × 16 control pins are required; the dynamic scanning means that segment selection lines of the nixie tubes are connected together, and independent bit selection lines are used for controlling which nixie tube to display in a time-sharing mode, for example, if an 8-segment 16-bit nixie tube is displayed, only 8+ 16-24 control pins are needed, and the dynamic scanning mode is very suitable for driving a multi-bit nixie tube to display. Because the dynamic scanning is to send out the corresponding segment selection and the bit selection to each nixie tube in a time-sharing way, and the afterglow of the light-emitting diode and the persistence of vision of human eyes are utilized to make people feel as if each nixie tube is displayed at the same time, the brightness of the dynamic scanning display is lower than that of the static scanning; and the more nixie tubes are driven, the shorter the display time of each 1-digit nixie tube is, and the lower the brightness of the LED is.
For 8 segment by 16 bit LED nixie tube display driving control chip adopting dynamic scanning mode, such as HT16K33([ 1)]Datasheet.HT16K33:RAM Mapping 16*8LED Controller Driver with keyscan[Z].Holtek,2011)、TM1640([2]Datasheet.TM1640 LED drive control special circuit Z]Time MICRO ELECTRONICS, Rev03), etc., which are driven in such a way that 16-bit nixie tubes are displayed in a time-sharing manner, only 8 segments of a certain 1-bit nixie tube are displayed at each time, and the other 15-bit nixie tubes are not displayed. Suppose that the time for displaying a 1-bit nixie tube is t1Then the time of displaying the 16-bit nixie tube is t16＝t116. about.16; it can be seen that t16For one display period, displayingThe duty ratio of the 1-bit nixie tube is t1/t 161/16. Due to the adoption of a dynamic scanning mode, under the condition of a certain duty ratio, the driving voltage or the driving current of the LED can be increased only by increasing the display brightness of the LED; for the application occasions with lower supply voltage, for example, the 1.8V-2.0V supply voltage is adopted to drive the red LED nixie tube, so that the LED display brightness is difficult to improve. The LED display brightness can be increased by increasing the duty cycle of the LED display under the condition that the application environment is not changed.
Disclosure of Invention
The invention aims to provide an energy-saving light-emitting nixie tube display driving circuit.
The invention is provided with a serial interface module and a segment driving module;
the serial interface module is used for communicating with an external control chip, the serial interface module comprises a reset circuit, a command decoding circuit, a display storage circuit and the like, the reset circuit times the low level state of a clock pin SCK, when the time that the SCK is continuously in the low level exceeds a set value, a reset signal rstb is effective, the chip enters the reset state, and the power consumption is very low; when the SCK is changed from a low level to a high level, the reset signal rstb is invalid, and the chip enters a working state; the external control chip transmits commands to the chip through a clock pin SCK and a data pin SDA, and the command decoding circuit decodes the input commands to generate corresponding control signals; the display storage circuit is used for storing the display data output by the command decoding circuit;
the segment driving module is used for generating driving waveforms, comprises a segment selection driver, a bit selection driver and the like, inputs of the segment selection driver and the bit selection driver are driving waveforms WAVE and display data, and the segment selection driver is used for driving the LED nixie tube in a dynamic scanning mode.
The generating of the corresponding control signals may select WAVE for the drive waveforms and update the display data seg0[7:0] seg15[7:0 ].
According to the LED digital tube display circuit, the conduction duty ratio of the LED digital tube display circuit is improved, and the power supply voltage of the LED driving circuit is reduced and optimized, so that the power consumption of the LED digital tube is obviously reduced under the condition of the same brightness. Compared with the prior nixie tube display driving technology, the circuit method can obviously improve the display brightness of the LED nixie tube under the same use environment and power consumption, reduce the heat dissipation requirement on the driving circuit and reduce the product cost of relevant parts of the display driving.
By combining the traditional driving method for driving the multi-position LED nixie tube by dynamic scanning, a novel circuit technology for saving energy and improving the LED display brightness is provided. The circuit technology improves the LED display brightness by improving the LED display duty ratio, and reduces and optimizes the power supply voltage of the LED driving circuit to realize the reduction of power consumption; for example, the structure of 8 segments by 16 bits is optimized into the structure of 16 segments by 8 bits, namely 2 nixie tubes are displayed at each moment; or the structure of 8 segments by 16 bits is kept unchanged, but 8 segments of the 16-bit nixie tube are displayed in time, namely, a certain 1 segment of the 16-bit nixie tube is displayed at each moment. By adopting the two methods, the LED display duty ratio can be improved from 1/16 to 1/8, which is doubled compared with the display duty ratio of the existing drive circuit; and the circuit technology implemented by the invention can not increase the chip control pins.
Drawings
Fig. 1 is a block diagram of an overall circuit configuration of an embodiment of the present invention.
Fig. 2 shows the driving waveforms of the conventional 8-segment by 16-bit structure.
Fig. 3 shows driving waveforms of segment 16 x 8 bit structure according to the embodiment of the present invention.
Fig. 4 shows driving waveforms of a segment x 16 bit structure according to embodiment 8 of the present invention.
Fig. 5 is an application diagram of 8 segments by 16 bits structure.
Fig. 6 is a schematic diagram of the application of the 16-segment x 8-bit structure.
Detailed Description
The embodiment of the invention comprises a serial interface module and a segment bit driving module, wherein the general circuit block diagram is shown in fig. 1, and fig. 2 shows the existing driving waveform with 8 segments by 16 bit structure.
The invention is provided with a serial interface module and a segment driving module; the serial interface module is used for communicating with an external control chip, the serial interface module comprises a reset circuit, a command decoding circuit, a display storage circuit and the like, the reset circuit times the low level state of a clock pin SCK, when the time that the SCK is continuously in the low level exceeds a set value, a reset signal rstb is effective, the chip enters the reset state, and the power consumption is very low; when the SCK is changed from a low level to a high level, the reset signal rstb is invalid, and the chip enters a working state; the external control chip transmits commands to the chip through a clock pin SCK and a data pin SDA, and the command decoding circuit decodes the input commands to generate corresponding control signals; the display storage circuit is used for storing the display data output by the command decoding circuit; the segment driving module is used for generating driving waveforms, comprises a segment selection driver, a bit selection driver and the like, inputs of the segment selection driver and the bit selection driver are driving waveforms WAVE and display data, and the segment selection driver is used for driving the LED nixie tube in a dynamic scanning mode. The generating of the corresponding control signals may select WAVE for the drive waveforms and update the display data seg0[7:0] seg15[7:0 ].
The input signals of the serial interface module are 2-wire serial interfaces SCK and SDA, and the output signals mainly comprise drive waveform selection WAVE, display data seg0[7:0], seg1[7:0], seg2[7:0], seg3[7:0], seg4[7:0], seg5[7:0], seg6[7:0], seg7[7:0], seg8[7:0], seg9[7:0], seg10[7:0], seg11[7:0], seg12[7:0], seg13[7:0], seg14[7:0] and seg15[7:0 ].
FIG. 3 shows a driving waveform with a 16-segment-by-8-bit structure, and 16 segments of SEG 15-0 are displayed at the same time at each moment, that is, a 2-bit nixie tube is displayed at each moment, and the time for displaying a 1-bit nixie tube is t1Then the time of displaying the 16-bit nixie tube is t16＝t 18, respectively; it can be seen that t16In one display period, the duty ratio of the 1-bit nixie tube is displayed as t1/t16＝1/8。
FIG. 4 shows a driving waveform with 8 segments by 16 bits, each time segment 1 of 16 bits GRID 15-0 is displayed, and the time t of the segment 1 is shown1Then the time of displaying 8 segments is t8＝t 18, respectively; it can be seen that t8In one display period, the duty ratio of the 1-bit nixie tube is displayed as t1/t8＝1/8。
The design method for improving the LED display brightness comprises the following steps:
the serial interface module detects the SCK and the SDA, decodes each command, and saves data to be displayed.
Secondly, selecting a 16-segment 8-bit driving mode, wherein WAVE is 0; the drive mode of 8 segments by 16 bits is selected.
Fig. 5 shows an application diagram of an 8-segment-by-16-bit structure, and fig. 6 shows an application diagram of a 16-segment-by-8-bit structure.
Claims (2)
1. An energy-saving luminous nixie tube display drive circuit is characterized by being provided with a serial interface module and a segment drive module;
the serial interface module is used for communicating with an external control chip and comprises a reset circuit, a command decoding circuit and a display storage circuit, wherein the reset circuit is used for timing the low level state of a clock pin SCK, when the time that the SCK is continuously in the low level exceeds a set value, a reset signal rstb is effective, the chip enters the reset state, and the power consumption is very low; when the SCK is changed from a low level to a high level, the reset signal rstb is invalid, the chip enters a working state, and the external control chip transmits a command to the chip through the clock pin SCK and the data pin SDA; the command decoding circuit decodes the input command and generates a corresponding control signal; the display storage circuit is used for storing the display data output by the command decoding circuit;
the segment driving module is used for generating a driving waveform, comprises a segment selection driver and a bit selection driver, inputs of the segment selection driver and the bit selection driver are a driving waveform WAVE and display data, and drives the LED nixie tube in a dynamic scanning mode;
the specific method for driving the LED nixie tube comprises the following steps:
the method comprises the steps that a serial interface module detects an SCK and an SDA, decodes each command and simultaneously saves data to be displayed;
secondly, WAVE =0, selecting 16 segments of 8-bit driving modes, and displaying 2-bit digital tubes at each moment; WAVE =1, the 8-segment by 16-bit driving method is selected, 8 segments of the 16-bit digital tube are displayed at different time, and 1 segment of the 16-bit digital tube is displayed at each time.
2. The power-saving light-emitting nixie tube display driving circuit as claimed in claim 1, wherein the corresponding control signals are generated to select WAVE for driving waveform and update display data seg0[7:0] seg15[7:0 ].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710375049.9A CN106960647B (en) | 2017-05-24 | 2017-05-24 | Energy-saving light-emitting nixie tube display driving circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710375049.9A CN106960647B (en) | 2017-05-24 | 2017-05-24 | Energy-saving light-emitting nixie tube display driving circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106960647A CN106960647A (en) | 2017-07-18 |
| CN106960647B true CN106960647B (en) | 2020-12-01 |
Family
ID=59482188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710375049.9A Active CN106960647B (en) | 2017-05-24 | 2017-05-24 | Energy-saving light-emitting nixie tube display driving circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106960647B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108320699B (en) * | 2018-04-25 | 2024-01-30 | 深圳市爱协生科技股份有限公司 | Receiving card for LED display |
| CN110444137A (en) * | 2019-08-15 | 2019-11-12 | 重庆川仪速达机电有限公司 | A kind of multidigit nixie tube display driver circuit and its control method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3956744A (en) * | 1973-01-10 | 1976-05-11 | Canon Kabushiki Kaisha | Numeral output system for circulating register |
| CN101494024B (en) * | 2009-02-11 | 2011-08-24 | 福州福大海矽微电子有限公司 | LED display drive and keyboard control chip |
| CN201765800U (en) * | 2010-08-12 | 2011-03-16 | 海信（山东）空调有限公司 | Display screen driving circuit |
| CN202093462U (en) * | 2010-12-22 | 2011-12-28 | 上海工业自动化仪表研究院 | A combination mechanism of a detachable general keyboard and a detachable LED display |
| CN201984777U (en) * | 2011-01-18 | 2011-09-21 | 深圳市视维科技有限公司 | LED (light-emitting diode) digital tube driving circuit |
| CN103761942B (en) * | 2014-02-14 | 2015-09-30 | 福州福大海矽微电子有限公司 | The numeral method of tool array display multiplexing algorithm and key control chip |
-
2017
- 2017-05-24 CN CN201710375049.9A patent/CN106960647B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106960647A (en) | 2017-07-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110085164B (en) | Display panel and display device | |
| CN111341249B (en) | Pixel circuit capable of adjusting drive current pulse width and related display panel | |
| CN102610201A (en) | Data processing method, data driving circuit and display device including the same | |
| US20170323593A1 (en) | Display panel driver and display apparatus having the same | |
| CN103514830A (en) | Display device, power control device and driving method thereof | |
| CN106960647B (en) | Energy-saving light-emitting nixie tube display driving circuit | |
| CN102006696B (en) | Light-emitting diode backlight drive circuit, method and constant current source thereof | |
| CN111583857B (en) | Pixel driving circuit, driving method thereof and display panel | |
| TWI540565B (en) | Multiplex driver and display device | |
| CN109767743A (en) | Driving circuit and its display device | |
| JP5643268B2 (en) | Light emitting diode driving circuit, light emitting diode driving device and driving method | |
| CN103813579B (en) | Light emitting diode driving circuit and driving system of light emitting diode | |
| CN204834004U (en) | High accuracy constant current LED driver chip of built -in multichannel scanning pulse density modulation control | |
| CN111445842B (en) | Driving circuit and driving method of display array | |
| TWI507079B (en) | Driving apparatus of light emitting diode and driving method thereof | |
| TWI543138B (en) | Scanning line driving device, display apparatus and scanning line driving method | |
| CN103854623B (en) | Segmented multi-path liquid crystal display achieving driving by I/O port of MCU and method | |
| CN114863856A (en) | Display panel driving method and display device | |
| CN210110305U (en) | Mu LED pixel driving circuit system | |
| CN102568385A (en) | Driving device, LED (light emitting diode) driving device and driving methods thereof | |
| Wang et al. | P‐90: A New PWM Pixel Circuit for Micro‐LED Displaly with 60Hz Driving and 120Hz Lighting | |
| CN206864161U (en) | The drive circuit that gate driving circuit and light emitting control drive circuit blend | |
| CN102014539A (en) | Backlight control circuit | |
| US11978408B2 (en) | Backlight unit, control method thereof, and liquid crystal display device | |
| US20230094046A1 (en) | Backlight unit, control method thereof, and liquid crystal display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |