CN2758919Y - LED driving circuit for domestic electrical appliance and host computer - Google Patents
LED driving circuit for domestic electrical appliance and host computer Download PDFInfo
- Publication number
- CN2758919Y CN2758919Y CN 200420095301 CN200420095301U CN2758919Y CN 2758919 Y CN2758919 Y CN 2758919Y CN 200420095301 CN200420095301 CN 200420095301 CN 200420095301 U CN200420095301 U CN 200420095301U CN 2758919 Y CN2758919 Y CN 2758919Y
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- circuit
- control signal
- led drive
- signal source
- light
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Abstract
The utility model discloses an LED driving circuit for domestic electrical appliances and host computers. Aiming at overcoming the defect of the prior art, the utility model provides an LED driving circuit with simple structure, low price and convenient debugging with software. The utility model comprises a control signal source, an LED driving IC and an LED display, wherein the LED driving IC comprises an MCU display memory, a serial interface, an oscillating circuit, a key wipe circuit, a segment driving circuit and a bit driving circuit. The output terminal of the oscillating circuit is connected with the input terminal of the serial interface, and the input terminal of the key wipe circuit is connected with the output terminal of the oscillating circuit. The MCU display memory is connected with the serial interface, and the output terminal of the MCU display memory is respectively connected with the input terminals of the segment driving circuit and the bit driving circuit. The control signal source is connected with the LED driving IC by a serial digital interface, and the LED driving IC is connected with the LED display by a data wire. The control signal source is connected in parallel with a crystal resonator.
Description
Technical field
The utility model relates to a kind of driving circuit that is used for the LED numeric display unit on the electrical equipment, especially a kind of driving circuit that is used for the LED numeric display unit of household electrical appliances and computer host box.
Background technology
At present, electric equipment, especially household electrical appliances and computer host box be user and improve the class of product for convenience, has adopted LCD in its display device.But, because the price comparison height of LCD, thereby increased manufacturing cost, make the consumer be difficult to accept.In addition, the dull coloring of liquid crystal display displays can not satisfy people to the colourful demand of display device.Therefore people seek to come the replacement liquid crystal display with the LED numeric display unit.Design of drive circuit more complicated in the existing LED numeric display unit, the debugging of the software that is mated are convenient inadequately, and manufacturing cost is higher.
Summary of the invention
The purpose of this utility model is the deficiency that overcomes prior art, provides a kind of simple in structure, cheap, cooperates software debugging led drive circuit easily.
Another purpose of the present utility model is the led drive circuit that can also control the light-emitting diode display that contains monochromatic area source and contain the light-emitting diode display of the area source of controlling colorful variable color.
Adopt following technical proposals can realize above-mentioned first purpose: the utility model comprises control signal source, LED drive IC, light-emitting diode display.Described LED drive IC contains MCU display-memory, serial line interface, oscillatory circuit, key scanning circuit, segment drive circuit, bit driver circuit.The output terminal of oscillatory circuit is connected with the input end of serial line interface, the input end of key scanning circuit is connected with the output terminal of oscillatory circuit, MCU display-memory and serial line interface interconnect, and the output terminal of MCU display-memory is connected with the input end of segment drive circuit, bit driver circuit respectively.Said control signal source is connected with the LED drive IC by serial digital interface, and the LED drive IC is connected with light-emitting diode display by data line.The control signal source also and connect a crystal oscillator is used to provide clock, makes signal source and LED drive IC 2 synchronous workings.
This control signal source can be a PC control signal source, also can be a MCU control signal source.
Above-mentioned light-emitting diode display can be an independent light-emitting diode display, also can be a light-emitting diode display that contains monochromatic area source, can also be a light-emitting diode display that contains the area source of colorful variable color control.Select the light-emitting diode display of above different structure for use, just can realize top said another purpose.
The beneficial effects of the utility model are:
Its circuit structure is fairly simple, and therefore with low cost, especially the software debugging that cooperates with it is very convenient;
For the technical scheme of having selected the light-emitting diode display that contains monochromatic area source for use, also has the clear bright advantage of display screen;
For the technical scheme of the light-emitting diode display of having selected the area source that contains colorful variable color control for use, can select color in addition, turn colors, thus show bright and colourful characteristics.
Above-mentioned led drive circuit adopts COMS technology, and the 5V low-power consumption has that plurality of display modes is available, many grades briliancy scalable.Particularly substituted LCD and greatly reduced cost, be convenient to popularize with light-emitting diode display.
Description of drawings
Fig. 1 is the circuit block diagram that the utility model contains an independent light-emitting diode display;
Fig. 2 is the circuit block diagram that the utility model contains the light-emitting diode display of monochromatic area source;
Fig. 3 is the circuit block diagram that the utility model contains the colorful color-changed LED display of area source.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Referring to Fig. 1-Fig. 3.Embodiment comprises control signal source 1, LED drive IC 2, independent light-emitting diode display 3.LED drive IC 2 wherein contains MCU display-memory, serial line interface, oscillatory circuit, key scanning circuit, segment drive circuit, bit driver circuit.The output terminal of oscillatory circuit is connected with the input end of serial line interface, the input end of key scanning circuit is connected with the output terminal of oscillatory circuit, MCU display-memory and serial line interface interconnect, and the output terminal of MCU display-memory is connected with the input end of segment drive circuit, bit driver circuit.Control signal source 1 is connected with LED drive IC 2 by serial digital interface, and LED drive IC 2 is connected with light-emitting diode display 3 by data line.LED drive IC 2 can be selected the analog line driver of PT6961, HD6928, SM1628 or other model for use.On the control signal source 1 and connect a crystal oscillator 11, be used to provide clock, make signal source and LED drive IC 2 synchronous workings.
Above-mentioned control signal source 1 produces serial control signal, select STB to be connected by data line DATA, clock line CLK with sheet respectively, deliver to the serial line interface of led driver, through built-in command decoding, the instruction of generation drive controlling, under the synchronous coordination of clock circuit, display mode, brightness degree etc. are set, make the led driver initialization; Afterwards, video data is constantly sent in control signal source 1, after the decoding of inside, be sent to inner display-memory and control corresponding bit driver circuit, segment drive circuit output voltage, it is luminous that driving is contained in the LED of corresponding position in numeral, character and the figure light hole on the screen board of external LED display 3 and section, shows pre-designed numeral, character and figure.External key produces push button signalling by key scanning circuit, delivers to inside by key memory, and the processing and the coordination of response are done by reading key command in control signal source 1 according to key information.
Above-mentioned control signal source 1 can be PC control signal source or MCU control signal source.
Above-mentioned light-emitting diode display 3 can be that single light-emitting diode display or the light-emitting diode display that contains monochromatic area source can also be the light-emitting diode displays that contains the area source of colorful variable color control.
After the exterior face circuit of light sources of light-emitting diode display 3 powers on, by the light-emitting procedure of finishing in advance by key control inside, through inner LED drive IC 2 driving LED light-emitting devices, because the LED light-emitting device can be selected the light-emitting diode display of the area source that contains colorful variable color control for use, makes the luminous different colours that is combined into of LED.The multicolour preference pattern is provided like this, has made the color of light-emitting diode display conversion more rich and varied.
Claims (6)
1, a kind of led drive circuit that is used for household electrical appliances and host computer is characterized in that: comprise control signal source, LED drive IC, light-emitting diode display; Described LED drive IC contains MCU display-memory, serial line interface, oscillatory circuit, key scanning circuit, segment drive circuit, bit driver circuit; The output terminal of oscillatory circuit is connected with the input end of serial line interface, the input end of key scanning circuit is connected with the output terminal of oscillatory circuit, MCU display-memory and serial line interface interconnect, and the output terminal of MCU display-memory is connected with the input end of segment drive circuit, bit driver circuit respectively; Said control signal source is connected with the LED drive IC by serial digital interface, and the LED drive IC is connected with light-emitting diode display by data line; Said control signal source also and connect a crystal oscillator.
2, led drive circuit according to claim 1 is characterized in that: said control signal source is PC control signal source.
3, led drive circuit according to claim 1 is characterized in that: described control signal source is MCU control signal source.
4, according to claim 1 or 2 or 3 described led drive circuits, it is characterized in that: described light-emitting diode display is the light-emitting diode display that contains monochromatic area source.
5, according to claim 1 or 2 or 3 described led drive circuits, it is characterized in that: described light-emitting diode display is the light-emitting diode display that contains the colorful variable color control of area source.
6. according to claim 1 or 2 or 3 described led drive circuits, it is characterized in that: said LED drive IC 2 can be selected PT6961 or HD6928 or SM1628 for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420095301 CN2758919Y (en) | 2004-11-13 | 2004-11-13 | LED driving circuit for domestic electrical appliance and host computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420095301 CN2758919Y (en) | 2004-11-13 | 2004-11-13 | LED driving circuit for domestic electrical appliance and host computer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2758919Y true CN2758919Y (en) | 2006-02-15 |
Family
ID=36079057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420095301 Expired - Fee Related CN2758919Y (en) | 2004-11-13 | 2004-11-13 | LED driving circuit for domestic electrical appliance and host computer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2758919Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877925A (en) * | 2009-12-15 | 2010-11-03 | 南京乐金熊猫电器有限公司 | LED driving circuit |
| CN103050087A (en) * | 2012-12-26 | 2013-04-17 | 数源科技股份有限公司 | Display system for vehicle-mounted multimedia player and control method thereof |
| CN104778916A (en) * | 2014-12-02 | 2015-07-15 | 深圳市视维科技有限公司 | All-character LED nixie tube display driving circuit |
-
2004
- 2004-11-13 CN CN 200420095301 patent/CN2758919Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101877925A (en) * | 2009-12-15 | 2010-11-03 | 南京乐金熊猫电器有限公司 | LED driving circuit |
| CN103050087A (en) * | 2012-12-26 | 2013-04-17 | 数源科技股份有限公司 | Display system for vehicle-mounted multimedia player and control method thereof |
| CN104778916A (en) * | 2014-12-02 | 2015-07-15 | 深圳市视维科技有限公司 | All-character LED nixie tube display driving circuit |
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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 |