CN2598086Y - Small charactron display - Google Patents
Small charactron display Download PDFInfo
- Publication number
- CN2598086Y CN2598086Y CNU032235240U CN03223524U CN2598086Y CN 2598086 Y CN2598086 Y CN 2598086Y CN U032235240 U CNU032235240 U CN U032235240U CN 03223524 U CN03223524 U CN 03223524U CN 2598086 Y CN2598086 Y CN 2598086Y
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- circuit
- display device
- shows signal
- display
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Abstract
The utility model relates to a display device which is employed in products such as household electrical appliances. The technical proposal is to provide a miniature nixie tube display device so as to solve the problems such as bad anti-jamming ability, big volume, and higher cost of the prior nixie tube display device. The utility model comprises a nixie display tube, a display drive circuit which is connected with the nixie display tube, a signal interface which is connected with the main board and used for receiving and displaying signals, and an anti-jamming circuit; each suit of display signal is oppositely smoothing disposed twice after being input to the anti-jamming circuit to smoothing the interfering signals; the anti-jamming circuit comprises six inverter cores 74HC04 and corresponding smoothing capacitor. The utility model has the advantages of few component needed, small volume, low cost and excellent anti-jamming ability.
Description
Technical field
The utility model relates to employed display device in the products such as household electrical appliance, more particularly, relates to the stronger miniature digitrons display device of a kind of interference free performance.
Background technology
In products such as a lot of household electrical appliance, all need to install information such as duty that digital tube display device shows this product, parameter.Can increase many charactrons (or nixie display), light emitting diode thus, components and parts such as button are set, these components and parts all need to be contained on the PCB (printed circuit board (PCB)), and making originally, limited cloth board space becomes very crowded.On the other hand, the interference free performance of general digital tube display device is relatively poor, when carrying out EMC (electromagnetic compatibility) test, often can not reach required standard, particularly in electric fast transient/train of impulses test event, bad phenomenon such as screen sudden strain of a muscle, deadlock can occur, have a strong impact on the performance index of household electrical appliance.
Present solution is to suppress electromagnetic interference (EMI) by increase electric capacity, resistance, need on pcb board, increase more multicomponent device in this method, thereby need to increase the area of pcb board, realize that cost is higher, in a lot of household electronic products, all be difficult to apply.
The utility model content
The utility model is at the above-mentioned defective of prior art, solve that required components and parts are more in the time of will improving interference free performance in existing digital tube display device, volume is big, cost is than problems such as height, with less components and parts, that lower cost is done volume is little, the digital tube display device of strong anti-interference performance.
The technical scheme that its technical matters that solves the utility model adopts is: construct a kind of miniature digitrons display device, comprise digital display tube, the display driver circuit that is connected with described digital display tube, and be used for being connected to receive the signaling interface of shows signal with mainboard, it is characterized in that, also comprise anti-jamming circuit, described interference treatment circuit is connected between described signaling interface and the described display driver circuit, the shows signal that is used for described signaling interface is imported is carried out anti-interference process, outputs to described display driver circuit again.
In described anti-jamming circuit of the present utility model, each road shows signal is input to an anti-interference process branch road respectively, the described anti-interference process of each bar is propped up the anti-phase rectification circuit of two series connection of route and is formed, and described two anti-phase rectification circuits carry out twice anti-phase rectification to each road shows signal to be handled.
Above-mentioned twice anti-phase rectification handled and can be finished by special integrated chip, and the shows signal of being introduced by described signal interface circuit is generally three the tunnel, and this moment, described display circuit adopted the 74HC04 chip that includes six phase inverters; Each road shows signal is used two phase inverters wherein, and the output terminal of second phase inverter is connected to corresponding next stage circuit, and simultaneously, the output terminal of the output terminal of its first phase inverter and second phase inverter is respectively through filter capacitor ground connection.
By adopting such scheme, the shared volume of anti-jamming circuit is very little, thereby can on the pcb board of small size very, realize digital tube display device of the present utility model, its anti-interference effect can reach the required EMC standard of country or industry fully, can prevent the appearance of screen flicker, and cost is low, volume is little.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the schematic diagram of the utility model digital tube display device;
Fig. 2 is the circuit diagram of digital tube display device in preferred embodiment of the utility model.
Embodiment
The principle of the utility model digital tube display device wherein is connected by the mainboard of signaling interface 1 with the outside as shown in Figure 1, to receive the shows signal by the mainboard input; This shows signal is input to after the anti-jamming circuit 2, carries out twice anti-phase rectification processing, the undesired signal in the filtering shows signal wherein through its first anti-phase rectification circuit 21 and the first anti-phase rectification circuit 22; And then be input to display driver circuit 3, handle the back corresponding display drive signals of output to digital display tube 4 by it.Two the anti-phase rectification circuits that only drawn among Fig. 1, in fact each road shows signal all will be handled through twice anti-phase rectification, if three tunnel shows signal are arranged, six anti-phase processors of needs be arranged then.
A preferred embodiment of the present utility model has wherein adopted a 74HC04 chip that includes six phase inverters to finish above-mentioned twice anti-phase work of treatment as shown in Figure 2.The X201 of Fig. 2 upper right side is used for the signaling interface that is connected with outside mainboard, and D203 is hex inverter chip 74HC04.As can be seen from the figure, then the 3rd of signaling interface X201 the, 4,5 pin have been introduced three tunnel shows signal.The signal of introducing with X201 the 5th pin is an example, and this signal is input to the 1st pin A0 of D203, after being exported by the 2nd pin O0 after anti-phase processings for the first time, through filter capacitor C202 ground connection, is input to the 3rd pin A1 of D203 simultaneously; After anti-phase processing for the second time,,, output to the 1st, 2 pin of D201 and the 1st, 2 pin of D202 simultaneously through filter capacitor C201 ground connection by the 4th pin O1 output.As can be seen from the figure, each road shows signal is by anti-phase processing twice, and the anti-phase each time signal of back output of handling is respectively through filter capacitor ground connection.Through above-mentioned anti-interference process, but the most of undesired signal in the filtering shows signal, and final anti-interference effect has reached country and the required EMC standard of industry fully, can prevent the appearance of screen flicker, and cost is low, volume is little.
In Fig. 2, adopted two shift register D201 and D202, that use in the present embodiment is chip 74HC164.Wherein D201 sends out the common port that V211, V212 drive charactron LD201, LD202 respectively by triode, also sends out the anode of V210 driven for emitting lights diode V205, V206, V207, V208, V209 by the LED triode, also is used to detect push button signalling simultaneously.
D202 then is used for cushioning the light on and off of other field of driving LED charactron and the cathodic control of light emitting diode, thereby realizes the demonstration and the operation of whole display circuit.
Digital tube display device of the present utility model is anti-interference effective, and cost is low, volume is little, can be used on the various household electrical appliance.
Claims (4)
1, a kind of miniature digitrons display device, comprise digital display tube, the display driver circuit that is connected with described digital display tube, and be used for being connected to receive the signaling interface of shows signal with mainboard, it is characterized in that, also comprise anti-jamming circuit, described interference treatment circuit is connected between described signaling interface and the described display driver circuit, the shows signal that is used for described signaling interface is imported is carried out anti-interference process, outputs to described display driver circuit again.
2, miniature digitrons display device according to claim 1, it is characterized in that, in described anti-jamming circuit, each road shows signal is input to an anti-interference process branch road respectively, the described anti-interference process of each bar is propped up the anti-phase rectification circuit of two series connection of route and is formed, and described two anti-phase rectification circuits carry out twice anti-phase rectification to each road shows signal to be handled.
3, miniature digitrons display device according to claim 2 is characterized in that, described signal interface circuit is introduced three tunnel shows signal, and described display circuit adopts the 74HC04 chip that includes six phase inverters; Each road shows signal is used two phase inverters wherein, and the output terminal of its first phase inverter is connected to the input end of second phase inverter, and the output terminal of second phase inverter is connected to corresponding next stage circuit.
4, miniature digitrons display device according to claim 3 is characterized in that, to each road shows signal, the output terminal of the output terminal of its first phase inverter and second phase inverter is respectively through filter capacitor ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032235240U CN2598086Y (en) | 2003-01-28 | 2003-01-28 | Small charactron display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU032235240U CN2598086Y (en) | 2003-01-28 | 2003-01-28 | Small charactron display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2598086Y true CN2598086Y (en) | 2004-01-07 |
Family
ID=34162850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU032235240U Expired - Fee Related CN2598086Y (en) | 2003-01-28 | 2003-01-28 | Small charactron display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2598086Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915051A (en) * | 2012-12-29 | 2014-07-09 | 北京谊安医疗系统股份有限公司 | Method for controlling display of nixie tube |
| CN104332125A (en) * | 2014-11-13 | 2015-02-04 | 梧州学院 | Nixie tube panel and key control circuit and control method thereof |
-
2003
- 2003-01-28 CN CNU032235240U patent/CN2598086Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915051A (en) * | 2012-12-29 | 2014-07-09 | 北京谊安医疗系统股份有限公司 | Method for controlling display of nixie tube |
| CN104332125A (en) * | 2014-11-13 | 2015-02-04 | 梧州学院 | Nixie tube panel and key control circuit and control method thereof |
| CN104332125B (en) * | 2014-11-13 | 2017-04-12 | 梧州学院 | Nixie tube panel and key control circuit and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |