CN201170944Y - LED display control device - Google Patents
LED display control device Download PDFInfo
- Publication number
- CN201170944Y CN201170944Y CNU2008203004767U CN200820300476U CN201170944Y CN 201170944 Y CN201170944 Y CN 201170944Y CN U2008203004767 U CNU2008203004767 U CN U2008203004767U CN 200820300476 U CN200820300476 U CN 200820300476U CN 201170944 Y CN201170944 Y CN 201170944Y
- Authority
- CN
- China
- Prior art keywords
- display control
- led display
- mcu
- port
- control device
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The utility model relates to the display control technology in the filed of household appliances, in particular to a LED display control device. The utility model provides a LED display control device which is simple in circuits and low in cost. The LED display control device of the utility model has the technical scheme mainly as follows: each port among m output ports of MCU is respectively connected with other n output ports of MCU through n light emitting diodes. The LED display control device of the utility model adopts a connecting mode of LED matrix to control complex display interface of household appliances, which lowers the cost. The LED display control device is particularly suitable for a household air conditioner.
Description
Technical field
The utility model relates to the display screen control field of household electrical appliance, relates in particular to a kind of LED display control unit.
Background technology
At present, particularly on the air conditioner, generally adopt the LCD LCD as display screen, at household electrical appliance so that show relevant controlling parameters and operational factor.Because liquid crystal itself can be not luminous, must use backlight to illuminate its picture and could show that in some occasion, its brightness just can not reach user's demand.And the control of LCD more complicated from the angle of hardware, need special integrated circuit, perhaps need MCU with the LCD driving, it is higher relatively to control cost.And for LED display, itself can be luminous, brightness can free adjustment, the display frame combination in any, but because display interface is too complicated, Control Software is just very complicated, and the port of needed MCU (microprocessor) is also a lot, sometimes even need utilize chip such as SN74HC595 to carry out the port expansion, bring the increase of controlling cost.LED display control unit of the prior art as shown in Figure 1, it comprises MCU, current amplification circuit, a plurality of resistance and a plurality of light emitting diode, the negative electrode of each light emitting diode connects one to one by the output port of resistance and current amplification circuit, the connect one to one I/O port of MCU of the input port of current amplification circuit.Like this, control n light emitting diode just needs MCU to have n I/O port, when the value of n is big, just needs MCU have more I/O port, and the MCU cost with more I/O port is higher relatively.
The utility model content
At above-mentioned deficiency of the prior art, technical problem to be solved in the utility model is: the LED that a kind of circuit is simple, cost is low is provided display control unit.
The technical scheme in the invention for solving the above technical problem is: the LED display control unit, comprise MCU, light emitting diode, and each port in the m of the MCU output port is connected with other n the output port of MCU respectively by n light emitting diode.
Further have: also comprise current amplification circuit 1 and current amplification circuit 2; M the output port of the m of described current amplification circuit 2 input port and MCU is connected; Other n the output port of the n of described current amplification circuit 1 input port and MCU is connected; Each port in the m of current amplification circuit 2 output port is connected with n output port of current amplification circuit 1 respectively by a described n light emitting diode.
Further have: the resistance of each port series connection in the m of current amplification circuit 2 output port.
Further have again: described m 〉=3, described n 〉=3.
The beneficial effects of the utility model are: adopt the complicated display interface of LED matrix connected mode control household electrical appliance, reduced cost.
Description of drawings
Fig. 1 is the circuit diagram of the LED display control unit of prior art;
Fig. 2 is the circuit diagram of LED display control unit of the present utility model.
Embodiment
The utility model adopts common connected mode at the LED display control unit of prior art and the needs cost great achievement brought was controlled complicated display interface problem originally, has proposed employing matrix ways of connecting, has saved cost.
The utility model will be further described below in conjunction with accompanying drawing.
As shown in Figure 2, the output port I/O (1) of MCU, I/O (2) ... .I/O (m) is connected with current amplification circuit 2 input ends, and by m current-limiting resistance formation m road output; Other n road output port I/O1, the I/O2....I/Oi....I/On of MCU are connected with current amplification circuit 1 input end, and form the output of n road, respectively are connected to a light emitting diode at the matrix infall of output of above-mentioned m road and the output formation of n road.The matrix L ED circuit of Lian Jieing can be realized each light emitting diode is scanned output every the regular hour like this, realizes timesharing control.As can be seen from Figure 2, n * m light emitting diode of control only need utilize n+m the I/O port of MCU to get final product.For better outstanding advantage of the present utility model, can limit m 〉=3, n 〉=3.For example: need 9 light emitting diodes of control,, and adopt the utility model only to need 6 I/O ports to get final product if adopt the connected mode of prior art then need to utilize MCU to have 9 I/O ports.Current amplification circuit 1 and current amplification circuit 2 are for the better driving light emitting diode among the figure, and the effect of resistance is a current limliting among the figure, can generally adopt 330 ohm to be advisable according to the size of its resistance of brightness regulation of display frame.
For the circuit in the utility model, when I/O (m) end level be high, I/On end level is when low, and the light emitting diode Dmn conducting that is in so on the point of crossing of matrix of this two-way output formation is luminous, when the level of these two ports was in other states, light emitting diode Dmn extinguished.We just can adopt sweep signal that circuit is scanned realization each light emitting diode is scanned output every certain time interval like this, light respectively or flame-out, realize timesharing control.
Claims (4)
1.LED display control unit comprises MCU, light emitting diode, it is characterized in that: each port in the m of the MCU output port is connected with other n the output port of MCU respectively by n light emitting diode.
2. LED display control unit as claimed in claim 1 is characterized in that: also comprise current amplification circuit 1 and current amplification circuit 2; M the output port of the m of described current amplification circuit 2 input port and MCU is connected; Other n the output port of the n of described current amplification circuit 1 input port and MCU is connected; Each port in the m of current amplification circuit 2 output port is connected with n output port of current amplification circuit 1 respectively by a described n light emitting diode.
3. LED display control unit as claimed in claim 2 is characterized in that: the resistance of each port series connection in the m of described current amplification circuit 2 output port.
4. as claim 1,2 or 3 described LED display control units, it is characterized in that: described m 〉=3, described n 〉=3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203004767U CN201170944Y (en) | 2008-03-31 | 2008-03-31 | LED display control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008203004767U CN201170944Y (en) | 2008-03-31 | 2008-03-31 | LED display control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201170944Y true CN201170944Y (en) | 2008-12-24 |
Family
ID=40209996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008203004767U Expired - Fee Related CN201170944Y (en) | 2008-03-31 | 2008-03-31 | LED display control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201170944Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967031A (en) * | 2012-11-30 | 2013-03-13 | 四川长虹电器股份有限公司 | Air-conditioning system |
| CN104955247A (en) * | 2015-07-22 | 2015-09-30 | 广州广日电气设备有限公司 | LED linear constant current light emitting circuit and LED light emitting lamp panel |
-
2008
- 2008-03-31 CN CNU2008203004767U patent/CN201170944Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967031A (en) * | 2012-11-30 | 2013-03-13 | 四川长虹电器股份有限公司 | Air-conditioning system |
| CN102967031B (en) * | 2012-11-30 | 2015-09-30 | 四川长虹电器股份有限公司 | Air-conditioning system |
| CN104955247A (en) * | 2015-07-22 | 2015-09-30 | 广州广日电气设备有限公司 | LED linear constant current light emitting circuit and LED light emitting lamp panel |
| CN104955247B (en) * | 2015-07-22 | 2017-08-11 | 广州广日电气设备有限公司 | A kind of LED linear constant current illuminating circuit and luminous lamp plate |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103280191B (en) | LED backlight drive circuit, liquid crystal indicator and a kind of driving method | |
| CN103021343A (en) | LED (Light Emitting Diode) backlight drive circuit, backlight module and liquid crystal display device | |
| CN103280203B (en) | LED backlight drive circuit, liquid crystal indicator and a kind of driving method | |
| CN103198799B (en) | Backlight drive board and liquid crystal display | |
| CN103401209B (en) | LED backlight short-circuit protection circuit | |
| CN103384436B (en) | LED backlight constant current circuit | |
| CN201170944Y (en) | LED display control device | |
| CN103150999B (en) | Light-emitting diode (LED) backlight driving circuit and liquid crystal display device | |
| CN203812540U (en) | Display screen brightness control device, display device and air conditioning | |
| CN101770751A (en) | System and method for regulating brightness of backlight module of liquid crystal display | |
| CN102982771A (en) | Backlight driving circuit and liquid crystal display | |
| CN205378153U (en) | LEDTV remote control receiving control circuit | |
| CN101206836B (en) | Drive circuit for backlight module group | |
| CN202189539U (en) | Adaptive adjustment LED (light-emitting diode) backlight circuit | |
| CN202205441U (en) | Backlight control circuit, backlight lighting device, and LED liquid crystal display device | |
| CN201955649U (en) | Control circuit with variable-lift function for gas water heater | |
| CN105810154A (en) | LED back light module, display device and LED back light driving method | |
| CN201449716U (en) | LED display capable of automatically regulating luminance | |
| CN106211474B (en) | A kind of light adjusting circuit and display device of a variety of dimming modes of compatibility | |
| CN101887705A (en) | Direct type white light LED backlight source control device | |
| CN206134210U (en) | LED display screen control circuit with environment self -adaptation adjustting of lighteness function | |
| CN201374774Y (en) | Television set with lighting function | |
| CN103886840A (en) | Display screen brightness control device, air conditioner and method for controlling display screen brightness | |
| CN104244505A (en) | Drive circuit of LED | |
| CN203223803U (en) | Lamp for self adapting to environmental illumination |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SICHUAN CHANGHONG ELECTRIC CO.,LTD. Free format text: FORMER OWNER: SICHUAN CHANGHONG ELECTRIC APPLIANCE CO., LTD. Effective date: 20090703 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090703 Address after: No. 35, Mian Xing East Road, hi tech Zone, Sichuan, Mianyang Province: 621000 Patentee after: Sichuan Changhong Air-Coditioning Co., Ltd. Address before: No. 35, Mian Xing East Road, hi tech Zone, Sichuan, Mianyang Province: 621000 Patentee before: Sichuan Changhong Electrical Appliance Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081224 Termination date: 20130331 |