CN207441130U - LED dot matrix display screens - Google Patents
LED dot matrix display screens Download PDFInfo
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- CN207441130U CN207441130U CN201721079095.6U CN201721079095U CN207441130U CN 207441130 U CN207441130 U CN 207441130U CN 201721079095 U CN201721079095 U CN 201721079095U CN 207441130 U CN207441130 U CN 207441130U
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- controller
- dot matrix
- light intensity
- threshold
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Abstract
A kind of LED dot matrix display screens, including LED display, controller and the power supply being connected with the LED display and controller, the LED dot matrix display screens further include the photosensitive sensor being connected with the controller, the photosensitive sensor is used to detect environmental light intensity, and the light intensity signal of detection is sent to the controller, the controller includes comparison module and control handover module, the input terminal of the comparison module is connected with the photosensitive sensor, for receiving the light intensity signal that the photosensitive sensor is sent, and by the light intensity signal compared with first threshold and second threshold to export control signal, the control handover module controls the input voltage of LED display according to the control signal, to adjust the brightness of LED display, rationally utilize electric energy, achieve the purpose that energy saving.
Description
Technical field
The utility model is related to display screen technology field, more particularly to a kind of LED dot matrix display screens.
Background technology
LED dot matrix display screens by LED (light emitting diode) form, with lamp bead light on and off come show word, picture, animation,
Video etc. is all modular display device of each several part component, is usually made of display module, control system and power-supply system.
LED dot matrix display screens make it is simple, it is easy for installation, be widely used in various public arenas, as automobile station reporter, advertisement screen with
And billboard etc..
The display brightness of existing LED dot matrix screens is fixed light source brightness, and no matter how environmental light intensity changes, LED dot matrix
The brightness of screen will not all change.Existing LED dot matrix screens, when daytime, light intensity was larger, the pattern on LED dot matrix screens is not seen,
And when light intensity is dark at night, the pattern intensity on LED dot matrix screens is dazzling, and puzzlement is brought to user, and cannot rationally utilize
Electric energy.
Utility model content
In view of above-mentioned condition, it is necessary to which in the prior art, the brightness of LED dot matrix screens can not reasonable asking using electric energy
Topic, proposes a kind of LED dot matrix display screens.
A kind of LED dot matrix display screens are connected including LED display, controller and with the LED display and controller
Power supply, the LED dot matrix display screens further include the photosensitive sensor being connected with the controller, and the photosensitive sensor is used to examine
Environmental light intensity is surveyed, and the light intensity signal of detection is sent to the controller, the controller includes：
Comparison module, the input terminal of the comparison module are connected with the photosensitive sensor, for receiving the photosensitive biography
The light intensity signal that sensor is sent, and by the light intensity signal compared with first threshold and second threshold, when the ambient light
When being less than first threshold by force, first control signal is exported, when the environmental light intensity is less than or equal to first threshold, and is more than or waits
When second threshold, second control signal is exported, when the environmental light intensity is more than second threshold, exports the 3rd control signal,
The first threshold is less than the second threshold；
Switching control module, the switching control module are connected with the output terminal of the comparison module and the power supply,
First control signal, second control signal and the 3rd control signal for working as the comparison module output control described respectively
The input voltage of LED display is the first input voltage, the second input voltage and the 3rd input voltage, and first input is electric
Pressure, the second input voltage are sequentially increased.
Above-mentioned LED dot matrix display screens further include the driving circuit being connected respectively with the controller, photosignal detection mould
Block and key control module, the driving circuit and the photosignal detection module are connected respectively with the LED display, institute
Stating driving circuit includes column drive circuit and horizontal drive circuit, and the column drive circuit and horizontal drive circuit include two strings respectively
Join the decoder of connection, the horizontal drive circuit and the column drive circuit form 5-32 lines by two decoders respectively
Decoder.
Above-mentioned LED dot matrix display screens, wherein, the photosignal detection module include a phototriode, triode and
Operational amplifier, the base stage of the triode are connected with the emitter of the phototriode, and the emitter of the triode connects
Connect one end of a fixed resistance, the other end of the fixed resistance connects a stator pin of a variable resistor, it is described can power transformation
Another stator pin connection external power supply of resistance, the movable plate pin of the variable resistor and the anti-phase input of the operational amplifier
End connection, the collector of the triode connect the in-phase input end of the operational amplifier, the emitter of the triode and
The fixed resistance is grounded.
Above-mentioned LED dot matrix display screens, wherein, the capacitance of a variable resistor ground connection in parallel with the fixed resistance.
Above-mentioned LED dot matrix display screens, wherein, the emitter of the triode is also connected with the voltage-stabiliser tube of a ground connection.
Above-mentioned LED dot matrix display screens, wherein, the decoder uses 74HC154 decoders.
The present embodiment is converted to digital letter by temperature sensor senses environment illumination intensity, and by the light intensity signal of detection
Number it is sent to controller, controller is according to the input voltage of Digital Signals LED display, so as to control LED display
Brightness.When ambient lighting is stronger, i.e., more than second threshold when, increase the input voltage of LED display, so that LED display
Brightness increase, make the pattern of the LED display can also clearly show that when illumination is stronger.When ambient lighting is weaker, that is, it is less than
During first threshold, the input voltage of LED display is reduced, unnecessary electricity is avoided to waste.The present embodiment can be according to environment
The brightness of light intensity regulating LED display rationally using electric energy, achievees the purpose that energy saving.
Description of the drawings
Fig. 1 is the structure diagram of the LED dot matrix display screens in the utility model first embodiment；
Fig. 2 is the structure diagram of the controller in the utility model first embodiment；
Fig. 3 is the structure diagram of photosignal detection module in the utility model second embodiment.
Main element symbol description
Specific embodiment
For the ease of understanding the utility model, the utility model is more fully retouched below with reference to relevant drawings
It states.The utility model embodiment is given in attached drawing.But the utility model can be realized in many different forms, and
It is not limited to embodiment described herein.On the contrary, the purpose for providing the embodiment is the disclosure made to the utility model
More thorough and comprehensive.
It should be noted that when element is referred to as " being fixedly arranged on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement are for illustrative purposes only.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to the technology of the utility model
The normally understood meaning of technical staff in domain is identical.It is simply in the term used in the description of the utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all combination of one or more relevant Listed Items.
Referring to Fig. 1, it is the LED dot matrix display screens in the utility model first embodiment, including LED display 10, electricity
Source 20, photosignal detection module 30, key control module 40, controller 50, driving circuit, photosensitive sensor 70.The LED
Display screen 10 is connected with the power supply 20, which is used to power to the LED display 10.The controller 50 with it is described
Photosignal detection module 30, key control module 40, driving circuit, photosensitive sensor 70 and power supply 20 connect.Photosignal
Detection module 30 is connected with LED display 10.
The driving circuit includes column drive circuit 61 and horizontal drive circuit 62, the column drive circuit 61 and row driving electricity
Road 62 is all connected with the controller 50 and the LED display 10.The column drive circuit 61 and horizontal drive circuit 62 wrap respectively
Two decoders being connected in series are included, the column drive circuit 61 and the horizontal drive circuit 62 pass through two decodings respectively
Device forms 5-32 line decoders.Specifically, the decoder is 74HC154 decoders, the series connection of two panels 74HC154 decoders is made
With, it can be achieved that the row of 32 × 32LED dot matrix drives, thus one 5-32 line decoder circuit of composition to drive into every trade, translate
The output signal of code device output is controlled by the output bus of controller.Similarly, it is also using two panels that the scanning of row, which is lighted,
The mode of 74HC154 decoders series connection is realized.
30 pieces of photosignal detection mould is used to detect photosignal.Relevant decoder is gated by controller 50, is had
Body, by gating 8550 be allowed to 2.5V voltage turn-ons, LED display 10 is made to be in glimmer state, then carries out optical telecommunications
Number detection, controller 50 highlighted according to the photosignal of detection, this can realize the state of writing, and make LED lattice displays
Screen can show that different pattern and word.And the switching of function can be realized by button, realizes all light, it is anti-aobvious, it wipes
Except etc. functions.
The display screen used is designed as 1024, display mode is bright to cycle.Driving circuit uses transistor switching circuit,
Realize the light on and off of quick control dot matrix.Glimmer is scanned and lighted when it is implemented, 2.5V power supplys and 5V power supplys is respectively adopted
Surface sweeping is powered.
The dot matrix screen that LED display 10 in the present embodiment is 32*32, controller 50 use C8051F020 chips, pass through
The I/O port control 4-16 line 74HC154 decoders of controller are so as to reach the row and column of control 32 × 32LED dot matrix, light pen positions
The coordinate of the row and column of dot matrix.
The light intensity signal of detection is sent to the controller by the photosensitive sensor 70 for detecting environmental light intensity
50, the controller 50 adjusts the output voltage of power supply according to the digital signal, that is, adjusts the input voltage of LED display,
So as to adjust the brightness of the LED display.It should be understood that the inductive signal of photosensitive sensor 70 can pass through the digital-to-analogue
Modular converter is sent to the controller 50 after being converted to digital signal.
As shown in Fig. 2, controller 50 includes the comparison module 51 sequentially connected and switching control module 52.The relatively mould
The input terminal of block 51 is connected with the photosensitive sensor 70, for receiving the light intensity signal that the photosensitive sensor 70 is sent, and
By the light intensity signal compared with first threshold and second threshold, the first threshold is less than the second threshold.Work as institute
When stating environmental light intensity less than first threshold, comparison module 51 exports first control signal；When the environmental light intensity is less than or equal to
First threshold, and more than or equal to second threshold when, comparison module 51 export second control signal；When the environmental light intensity is more than
During second threshold, comparison module 51 exports the 3rd control signal.
The switching control module 52 is connected with the output terminal and the power supply 20 of the comparison module 51, the switching
Control module 52 is used for the input voltage for exporting signal according to the comparison module 51 and controlling the LED display 10.LED is shown
The input voltage of screen 10 is that voltage, to the voltage of LED display 10, passes through switching control mould for the input after partial pressure of power supply
The output voltage of block control power supply is the input voltage that can control the LED display 10.When it is implemented, controller 50 uses
The input of PWM wave control power supply voltage into LED display, so as to which the brightness of LED display 10 be adjusted.When comparing mould
When block exports first control signal, switching control module 52 controls the input voltage of the LED display 10 as the first input electricity
Pressure；When comparison module 51 exports second control signal, switching control module 52 controls the input voltage of the LED display to be
Second input voltage；When comparison module 51 exports three control signals, switching control module 52 controls the LED display
Input voltage is the 3rd input voltage.Wherein, the first input voltage, the second input voltage are sequentially increased.
Wherein, the average light intensity during night that first threshold draws for statistics, second threshold draw white for statistics
Its average light intensity.When environmental light intensity is less than first threshold, it is that controller 50, which control the input voltage of LED display 10,
One input voltage, the voltage when brightness which is used to make LED display 10 is suitable for night dark.When
Environmental light intensity is greater than or equal to first threshold and during less than or equal between second threshold, and controller 50 controls LED display 10
Input voltage be the second input voltage.When environmental light intensity is more than second threshold, controller 50 controls the defeated of LED display 10
Enter voltage for the 3rd input voltage.The brightness that 3rd input voltage is used to make LED display is suitable for when daytime, light was stronger
Voltage.It by the input voltage for the intensity control LED display 10 that photosensitive sensor 70 detects, both can show the LED
Screen clearly shows that, unnecessary electric energy can also be avoided to consume.
It should be understood that in the other embodiment of the utility model, photo-resistor can also be used to detect light intensity.Pass through
Photo-resistor one divider resistance of series connection, is converted to voltage change, which passes through analog-to-digital conversion (A/ by illumination variation
D after), it is transmitted in controller, so as to fulfill the adjusting of the input voltage of LED display.
The present embodiment is converted to digital letter by temperature sensor senses environment illumination intensity, and by the light intensity signal of detection
Number it is sent to controller, controller is according to the input voltage of Digital Signals LED display, so as to control LED display
Brightness.When ambient lighting is stronger, i.e., more than second threshold when, increase the input voltage of LED display, so that LED display
Brightness increase, make the pattern of the LED display can also clearly show that when illumination is stronger.When ambient lighting is weaker, that is, it is less than
During first threshold, the input voltage of LED display is reduced, unnecessary electricity is avoided to waste.The present embodiment can be according to environment
The brightness of light intensity regulating LED display rationally using electric energy, achievees the purpose that energy saving.
Referring to Fig. 3, the photosignal detection module for LED dot matrix display screens in the utility model second embodiment
The structure of LED dot matrix display screens in electrical block diagram, with first embodiment is essentially identical, the difference is that, institute
Stating photosignal detection module 30 includes a phototriode Q1, triode Q2 company and operational amplifier U1.The triode Q2
Base stage be connected with the emitter of the phototriode Q1, the emitter of the triode Q2 connects the one of a fixed resistance R1
End, the other end of the fixed resistance R1 connect a stator pin of a variable resistor R2, and the variable resistor R2's is another fixed
Piece pin connects external power supply VCC, the inverting input of the movable plate pin of the variable resistor R2 and the operational amplifier U1
Connection, the collector of the triode Q2 connect the in-phase input end of the operational amplifier U1, the transmitting of the triode Q2
Pole and the fixed resistance R1 are grounded.Phototriode Q1 leads to the photosignal of sensing for detecting photosignal
Microprocessor is transferred to after crossing operational amplifier U1 amplifications, controller 50 makes corresponding processing according to received signal.
Further, the capacitance C1, the capacitance C1 of a variable resistor R2 ground connection in parallel with the fixed resistance R1
Filter action is played, is filtered for the connection circuit to triode Q2.
Further, the emitter of the triode Q2 is also connected with the voltage-stabiliser tube D1 of a ground connection, plays pressure stabilization function, prevents
Judgement of the influence of fluctuations controller of signal to inductive signal.
In use, by the bright pattern of key control inlet point, photoelectric pen on LED dot matrix display screens is write and is streaked, observable
To contact point LED display brightness by dark to bright, the essence for the bright spot put just now can be shown on LED display
True coordinate, is selected by button, is realized system and is drawn the functions such as bright, anti-aobvious, whole screen erasing, stroke erasing, so as to be shown in LED
Screen display pattern can also change pattern.
Photosignal detection module in the present embodiment quickly detects photosignal by phototriode, and will detection
Photosignal be sent to controller after operational amplifier amplifies, realize and LED dot matrix display screens lighted.
Embodiment described above only expresses the embodiment of the utility model, and description is more specific and detailed, but simultaneously
Cannot the limitation to the utility model patent scope therefore be interpreted as.It should be pointed out that the ordinary skill for this field
For personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these belong to this
The protection domain of utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (6)
1. a kind of LED dot matrix display screens, including LED display, controller and the electricity being connected with the LED display and controller
Source, which is characterized in that the LED dot matrix display screens further include the photosensitive sensor being connected with the controller, the photosensitive biography
The light intensity signal of detection is sent to the controller by sensor for detecting environmental light intensity, and the controller includes：
Comparison module, the input terminal of the comparison module are connected with the photosensitive sensor, for receiving the photosensitive sensor
The light intensity signal of transmission, and by the light intensity signal compared with first threshold and second threshold, when the environmental light intensity is small
When first threshold, first control signal is exported, when the environmental light intensity is less than or equal to first threshold, and more than or equal to the
During two threshold values, second control signal is exported, when the environmental light intensity is more than second threshold, exports the 3rd control signal, it is described
First threshold is less than the second threshold；
Switching control module, the switching control module are connected with the output terminal of the comparison module and the power supply, are used for
When first control signal, second control signal and the 3rd control signal of comparison module output control the LED to show respectively
The input voltage of display screen be the first input voltage, the second input voltage and the 3rd input voltage, first input voltage, second
Input voltage is sequentially increased.
2. LED dot matrix display screens as described in claim 1, which is characterized in that further include what is be connected respectively with the controller
Driving circuit, photosignal detection module and key control module, the driving circuit and the photosignal detection module point
Be not connected with the LED display, the driving circuit include column drive circuit and horizontal drive circuit, the column drive circuit and
Horizontal drive circuit includes two decoders being connected in series respectively, and the horizontal drive circuit and the column drive circuit pass through respectively
Two decoders form 5-32 line decoders.
3. LED dot matrix display screens as claimed in claim 2, which is characterized in that the photosignal detection module includes a light
Quick triode, triode and operational amplifier, the base stage of the triode is connected with the emitter of the phototriode, described
The emitter of triode connects one end of a fixed resistance, and the other end of the fixed resistance connects a stator of a variable resistor
Pin, another stator pin connection external power supply of the variable resistor, movable plate pin and the computing of the variable resistor
The inverting input connection of amplifier, the collector of the triode connects the in-phase input end of the operational amplifier, described
The emitter of triode and the fixed resistance are grounded.
4. LED dot matrix display screens as claimed in claim 3, which is characterized in that the variable resistor and the fixed resistance are simultaneously
The capacitance of one ground connection of connection.
5. LED dot matrix display screens as claimed in claim 3, which is characterized in that the emitter of the triode is also connected with one and connects
The voltage-stabiliser tube on ground.
6. LED dot matrix display screens as claimed in claim 2, which is characterized in that the decoder uses 74HC154 decoders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721079095.6U CN207441130U (en) | 2017-08-25 | 2017-08-25 | LED dot matrix display screens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721079095.6U CN207441130U (en) | 2017-08-25 | 2017-08-25 | LED dot matrix display screens |
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| Publication Number | Publication Date |
|---|---|
| CN207441130U true CN207441130U (en) | 2018-06-01 |
Family
ID=62300970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721079095.6U Expired - Fee Related CN207441130U (en) | 2017-08-25 | 2017-08-25 | LED dot matrix display screens |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179796A (en) * | 2020-01-20 | 2020-05-19 | 厦门名想文化传播有限公司 | Lamp panel and combined intelligent spelling equipment based on wireless induction |
| CN111276060A (en) * | 2019-12-24 | 2020-06-12 | 厦门名想文化传播有限公司 | Combined intelligent spelling equipment |
| CN111276079A (en) * | 2020-01-20 | 2020-06-12 | 厦门名想文化传播有限公司 | Lamp panel and combined intelligent spelling equipment based on image recognition |
| CN112102734A (en) * | 2020-08-20 | 2020-12-18 | 安徽极光照明工程有限公司 | Campus LED electron publicity column based on temperature sensing monitoring |
| CN112201197A (en) * | 2020-10-10 | 2021-01-08 | 天长市辉盛电子有限公司 | System for adjusting display brightness of LED display screen |
| CN112614437A (en) * | 2020-11-19 | 2021-04-06 | 江苏玄博智能标识科技有限公司 | Intelligent propaganda system and control method thereof |
| CN114241985A (en) * | 2022-02-24 | 2022-03-25 | 深圳星普森信息技术有限公司 | Adaptive dimming compensation method of LED display screen |
-
2017
- 2017-08-25 CN CN201721079095.6U patent/CN207441130U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111276060A (en) * | 2019-12-24 | 2020-06-12 | 厦门名想文化传播有限公司 | Combined intelligent spelling equipment |
| CN111276060B (en) * | 2019-12-24 | 2022-02-22 | 厦门名想文化传播有限公司 | Combined intelligent spelling equipment |
| CN111179796A (en) * | 2020-01-20 | 2020-05-19 | 厦门名想文化传播有限公司 | Lamp panel and combined intelligent spelling equipment based on wireless induction |
| CN111276079A (en) * | 2020-01-20 | 2020-06-12 | 厦门名想文化传播有限公司 | Lamp panel and combined intelligent spelling equipment based on image recognition |
| CN111276079B (en) * | 2020-01-20 | 2023-10-27 | 厦门名想文化传播有限公司 | Lamp panel and combined intelligent spelling equipment based on image recognition |
| CN112102734A (en) * | 2020-08-20 | 2020-12-18 | 安徽极光照明工程有限公司 | Campus LED electron publicity column based on temperature sensing monitoring |
| CN112201197A (en) * | 2020-10-10 | 2021-01-08 | 天长市辉盛电子有限公司 | System for adjusting display brightness of LED display screen |
| CN112614437A (en) * | 2020-11-19 | 2021-04-06 | 江苏玄博智能标识科技有限公司 | Intelligent propaganda system and control method thereof |
| CN114241985A (en) * | 2022-02-24 | 2022-03-25 | 深圳星普森信息技术有限公司 | Adaptive dimming compensation method of LED display screen |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |