CN201449716U - LED display capable of automatically regulating luminance - Google Patents
LED display capable of automatically regulating luminance Download PDFInfo
- Publication number
- CN201449716U CN201449716U CN2009200450830U CN200920045083U CN201449716U CN 201449716 U CN201449716 U CN 201449716U CN 2009200450830 U CN2009200450830 U CN 2009200450830U CN 200920045083 U CN200920045083 U CN 200920045083U CN 201449716 U CN201449716 U CN 201449716U
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- led display
- mcu
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- output terminal
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Abstract
The utility model relates to a LED display, in particular to a LED display capable of automatically regulating luminance, comprising a LED display module. An input end for controlling the display content of the LED display module is connected with a driving end of a MCU. An input end of the LED display capable of automatically regulating luminance is connected with an output end of a display driving module. An input end of the display driving module is connected with a pulse width regulating output end of MCU and a nixietube bit driving end. A module switching connector of MCU is respectively connected with a photoresistor and a resistor. The other end of the photoresistor is earthed and the other end of the resistor is connected with a power supply. The utility model has the advantages that the LED display enhances the visual comfort level of user under the condition of remaining the display information, only one photoresistor is added on a universal LED display and the utility model is economical and convenient.
Description
Technical field
The utility model relates to a kind of light-emitting diode display, the especially a kind of light-emitting diode display that can regulate brightness automatically.
Background technology
At present, the brightness of the light-emitting diode display in indoor refrigerator, the air-conditioning is changeless, and the user does not see clearly when ambient brightness is higher; And the user feels dazzling when ambient brightness is low, crosses bright demonstration influence at night especially and has a rest, sleeps.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of light-emitting diode display of automatic adjusting brightness is provided, and its brightness can automatically adjust according to the light and shade according to its surrounding environment, increases the comfort level of user's vision.
The technical scheme that provides according to the utility model, automatically the light-emitting diode display of regulating brightness comprises the LED display module, the input end of the control displaying contents of described LED display module connects the section drive end of MCU, and the input end of the control brightness of LED display module connects the output terminal of driver module; The input end of described driver module connects pulse width modulation output terminal and the charactron position drive end of MCU; The analog to digital conversion interface of MCU connects photoresistance and resistance respectively, the other end ground connection of described photoresistance, another termination power of described resistance.
If described LED display module comprises the N position, N is a natural number, then described driver module comprises N Sheffer stroke gate, the output terminal of N Sheffer stroke gate connects the base stage of N triode respectively by N current-limiting resistance, the emitter of N triode connects power supply, the output terminal of the very described driver module of the current collection of N triode; The input end of a described N Sheffer stroke gate is the input end of driver module, and two input ends of each Sheffer stroke gate connect pulse width modulation output terminal and the charactron position drive end of MCU respectively.
The utility model has the advantages that: light-emitting diode display increases the comfort level of user's vision under the constant situation of display message, on the basis of general light-emitting diode display, only increase a photoresistance, and is economical convenient.
Description of drawings
Fig. 1, Fig. 2 are circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
The utility model is installed a photoresistance, the brightness in the photoresistance perception external world on the control panel of display, its resistance changes with brightness, and the brightness high value is little, otherwise, resistance is big, MCU calculates the brightness changing value, again according to this brightness changing value by the voltage of sampling photoresistance, regulate the PWM dutycycle, the average current of control light-emitting diode display, thus the brightness of display is changed, reach light-emitting diode display with the self-regulating purpose of ambient brightness.
As shown in Figure 1, 2: with 4 LED display modules is example, the input end that present embodiment is included in the control displaying contents of 4 LED display modules connects the section drive end A-H of MCU, and the input end of the control brightness of LED display module connects output terminal BB0, BB1, BB2, the BB3 of driver module; The pulse width modulation output terminal PWM of the input end connection MCU of described driver module and charactron position drive end B0, B1, B2, B3; The analog to digital conversion interface of MCU connects photoresistance R47 and resistance R 46 respectively, the other end ground connection GND of described photoresistance R47, another termination power VCC. of described resistance R 46
Described driver module comprises 4 Sheffer stroke gates, the output terminal of each Sheffer stroke gate connects the base stage of triode respectively by current-limiting resistance, the emitter of each triode meets power supply VCC, output terminal BB0, BB1, BB2, the BB3 of the very described driver module of the current collection of triode, the input end of the control brightness of connection LED display module.The input end of described 4 Sheffer stroke gates is the input end of driver module, and two input ends of each Sheffer stroke gate connect the pulse width modulation output terminal PWM of MCU and charactron position drive end B0, B1, B2, B3 respectively.
MCU carries out analog to digital conversion to the signal that is obtained by photoresistance and obtains ambient brightness, the dutycycle that MCU regulates PWM according to this ambient brightness, and the high PWM value of ambient brightness is big, on the contrary the PWM value is little.LED display brightness and PWM value have corresponding relation: the PWM value is big, the display brightness height, and the PWM value is little, and display brightness is low.System adopts 2ms timing interrupt module to interrupt showing control that system carried out the one-off pattern number conversion in per 1 second to showing the position, and the computing environment illuminance is carried out the adjustment of PWM value again.
Claims (2)
1. regulate the light-emitting diode display of brightness automatically, comprise the LED display module, it is characterized in that: the input end of the control displaying contents of described LED display module connects the section drive end of MCU, and the input end of the control brightness of LED display module connects the output terminal of driver module; The input end of described driver module connects pulse width modulation output terminal and the charactron position drive end of MCU; The analog to digital conversion interface of MCU connects photoresistance (R47) and resistance (R46) respectively, the other end ground connection (GND) of described photoresistance (R47), another termination power (VCC) of described resistance (R46).
2. the light-emitting diode display of automatic adjusting brightness as claimed in claim 1, it is characterized in that: establish described LED display module and comprise the N position, N is a natural number, then described driver module comprises N Sheffer stroke gate, the output terminal of N Sheffer stroke gate connects the base stage of N triode respectively by N current-limiting resistance, the emitter of N triode connects power supply (VCC), the output terminal of the very described driver module of the current collection of N triode; The input end of a described N Sheffer stroke gate is the input end of driver module, and two input ends of each Sheffer stroke gate connect pulse width modulation output terminal and the charactron position drive end of MCU respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200450830U CN201449716U (en) | 2009-05-27 | 2009-05-27 | LED display capable of automatically regulating luminance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200450830U CN201449716U (en) | 2009-05-27 | 2009-05-27 | LED display capable of automatically regulating luminance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201449716U true CN201449716U (en) | 2010-05-05 |
Family
ID=42554439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200450830U Expired - Lifetime CN201449716U (en) | 2009-05-27 | 2009-05-27 | LED display capable of automatically regulating luminance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201449716U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390383A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Control system of light-sensitive LED display screen |
| CN103390382A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Control system of self-adaptation LED display screen |
| CN112419998A (en) * | 2019-08-21 | 2021-02-26 | 浙江苏泊尔家电制造有限公司 | Method for adjusting brightness of household appliance display screen, household appliance and computer storage medium |
-
2009
- 2009-05-27 CN CN2009200450830U patent/CN201449716U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390383A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Control system of light-sensitive LED display screen |
| CN103390382A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Control system of self-adaptation LED display screen |
| CN103390383B (en) * | 2012-05-11 | 2015-09-16 | 四川优的科技有限公司 | The control system of light-sensitive LED display screen |
| CN112419998A (en) * | 2019-08-21 | 2021-02-26 | 浙江苏泊尔家电制造有限公司 | Method for adjusting brightness of household appliance display screen, household appliance and computer storage medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100505 |