Working principle of dynamic light box
1. A programmable image display device, characterized by comprising a fixed plate;
A plurality of LED lamps are installed on the fixing plate;
At least one LED programmable controller, which is electrically connected with the plurality of LED lamps, controls the luminous parameters of the plurality of LED lamps and adjusts the picture display effect;
A constant current drive circuit electrically connected with the plurality of LED lamps;
Canvas are formed on the light emitting sides of a plurality of LED lamps.
2. The programmable image display device according to claim 1, wherein the luminous parameters include the luminous time, luminous brightness and luminous frequency of the LED lamp.
3. The programmable picture display device according to claim 1, characterized in that the picture display effect includes that a plurality of LED lights are lit in sequence and then flicker, a plurality of LED lights are lit at the same time and then flicker, a plurality of LED lights are lit in sequence and then gradually dim, a plurality of LED lights are lit in sequence and then dim at the same time, or a plurality of LED lights gradually change color and display.
4. The programmable image display device according to claim 1, wherein the at least one LED programmable controller has a USB interface, and the programmed program is input to the at least one LED programmable controller through the USB interface.
5. The programmable image display device according to claim 1, wherein the plurality of LED lamps are formed on a plurality of LED light bars in a modular manner, and the plurality of LED light bars are fixed on the fixing plate.
6. The programmable image display device according to claim 5, wherein the programmable image display device comprises a plurality of LED programmable controllers, and each LED light bar is correspondingly provided with one LED programmable controller.
7. The programmable picture display device according to claim 1, characterized in that the programmable picture display device further comprises a canvas fixing piece, and the canvas fixing piece fixes the canvas on the light emitting sides of a plurality of LED lamps after being unfolded.
8. The programmable image display device according to claim 1, wherein the programmable image display device further comprises a photosensitive sensor, and the photosensitive sensor is electrically connected with the constant current driving circuit.
9. The programmable image display device according to claim 1, wherein the constant current driving circuit comprises:
Reference voltage input module;
A first operational amplifier, one input end of which is connected with the reference voltage input module, and the other input end of which is connected with the output end of the first operational amplifier;
A first MOS tube whose control terminal is connected to the output terminal of the first operational amplifier;
The regulating resistor is connected between the drain terminal of the first MOS tube and the ground;
The current mirror module is connected with the source end of the first MOS tube, and generates a mirror current which is mirrored with the current flowing through the adjusting resistor;
The first resistor is connected between the current mirror module and the ground;
A second operational amplifier, wherein one input end is connected to the anode end of the first resistor and the current mirror module, and the other input end is connected to the output end of the second operational amplifier;
The control end of the second MOS tube is connected to the output end of the second operational amplifier, and the source end of the second MOS tube is connected to a plurality of LED lamps connected in series;
The second resistor is connected between the drain terminal of the second MOS tube and the ground.
Working principle of dynamic light box
Programmable image display equipment
Technical field
The invention relates to the field of LED lamps, in particular to a programmable picture display device.
technical background
Advertising light box is a combination of continuous flashing and staying, which effectively improves people's visual impact; An image display device for improving the utilization rate of advertising unit area. The existing advertising light boxes are mainly EL dynamic light boxes. The existing EL dynamic light box is that after the luminescent powder and silver paste are activated, the program in the controller controls the time point of each luminescent part, thus producing various dynamic effects.
In the production of this kind of EL light box, it is necessary to use screen printing technology to print the light-emitting surface of the circuit and then paste pictures. The materials used are luminescent powder and silver paste, which are very harmful to human body. Due to the lack of light, EL dynamic light box can only be used in dim places, such as bars and other places, but not in practical places that are bright during the day. Moreover, the EL dynamic light box is easy to age after a long time of use, and the color is distorted, and a group of black spots like mold will appear on the light-emitting surface, which cannot be repaired.
Summary of the invention
In order to overcome the problem of low brightness of the existing EL dynamic light box, the invention provides a programmable image display device with high luminous brightness.
In order to achieve the above purpose, the invention provides a programmable picture display device, which comprises a fixed plate, a plurality of LED lamps, at least one LED programmable controller, a constant current driving circuit and a canvas. A plurality of LED lamps are mounted on the fixing plate. At least one LED programmable controller is electrically connected with a plurality of LED lamps to control the luminous parameters of the plurality of LED lamps and adjust the picture display effect. The constant current drive circuit is electrically connected with a plurality of LED lamps. Canvas are formed on the light emitting sides of a plurality of LED lamps.
According to the embodiment of the invention, the luminous parameters include the luminous time, luminous brightness and luminous frequency of the LED lamp.
According to one embodiment of the invention, the screen display effect includes that a plurality of LED lights are lit and then flashed sequentially, a plurality of LED lights are lit and then flashed simultaneously, a plurality of LED lights are lit and then dimmed gradually, a plurality of LED lights are lit and then dimmed simultaneously, or a plurality of LED lights gradually display color changes.
According to the embodiment of the invention, at least one LED programmable controller has a USB interface, and a programmed program is input to the at least one LED programmable controller through the USB interface.
In one embodiment of the invention, a plurality of LED lamps are formed on a plurality of LED light bars in a modular manner, and the plurality of LED light bars are fixed on a fixing plate.
In one embodiment of the invention, the programmable image display device comprises a plurality of LED programmable controllers, and each LED light bar is correspondingly provided with one LED programmable controller.
According to an embodiment of the invention, the programmable picture display device further comprises a canvas fixing piece, and the canvas fixing piece unfolds and fixes the canvas on the light emitting sides of the plurality of LED lamps.
According to one embodiment of the invention, the programmable image display device further comprises a photosensitive sensor, and the photosensitive sensor is electrically connected with the constant current driving circuit.
According to the embodiment of the invention, the constant current driving circuit comprises a reference voltage input module, a first operational amplifier, a first MOS tube, an adjusting resistor, a current mirror module, a first resistor, a second operational amplifier, a second MOS tube and a second resistor. One input end of the first operational amplifier is connected with the reference voltage input module, and the other input end is connected with the output end of the first operational amplifier. The control terminal of the first MOS tube is connected to the output terminal of the first operational amplifier. The adjusting resistor is connected between the drain terminal of the first MOS tube and the ground. The current mirror module is connected with the source end of the first MOS tube to generate mirror current which is mirror image with the current flowing through the adjusting resistor. The first resistor is connected between the current mirror module and the ground. One input of the second operational amplifier is connected to the common end of the first resistor and the current mirror module, and the other input is connected to the output of the second operational amplifier. The control end of that second MOS tube is connecte with the output end of the second operational amplifier, and the source end of the second MOS tube is connecte with a plurality of LED lamps connected in series. The second resistor is connected between the drain terminal of the second MOS tube and the ground.
To sum up, that programmable pattern display device provide by the invention adopts a plurality of LED lamp to replace luminescent powder and silver paste in the traditional EL dynamic light box, and has good luminous brightness, and the luminous brightness of the LED lamps can be adjust by a constant current driving circuit, so that the programmable pattern display device is not only suitable for dim light environment, but also suitable for light areas in MingLiang Yu, and has good pattern display effect. In addition, the programmable pattern display device provided by the invention does not contain substances harmful to human body, and has good use safety. The programmable pattern display device provided by the invention adopts a programming mode to change the luminous time, luminous brightness and luminous frequency of each LED lamp, and realizes a dynamic display effect. The display device of the invention adopts a programmable mode, and the display effect can be changed at will as required.
In order to make the above and other objects, features and advantages of the present invention more obvious and easy to understand, the following is a detailed description of preferred embodiments with reference to the accompanying drawings.
Brief description of drawings
Fig. 1 is a schematic structural diagram of a programmable screen display device provided by an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a constant current driving circuit provided by an embodiment of the present invention.
As shown in figure 1, the programmable picture display device provided by this embodiment includes a fixed plate 1, a plurality of LED lamps 2, at least one LED programmable controller 3, a constant current driving circuit 4 and a canvas 5. A plurality of LED lamps 2 are arranged on the fixing plate 1. At least one LED programmable controller 3 is electrically connected with a plurality of LED lamps 2 to control the luminous parameters of the LED lamps and adjust the picture display effect. The constant current drive circuit 4 is electrically connected to a plurality of LED lamps 2. Canvas 5 is formed on the light emitting side of a plurality of LED lamps 2.
In the programmable graphic display device provided by this embodiment, a plurality of LED lamps 2 are arranged on the fixed plate 1, and the luminous parameters of the plurality of LED lamps 2, such as the luminous time, luminous brightness and luminous frequency of each LED lamp, are changed by at least one LED programmable controller 3, so that the programmable graphic display device composed of a plurality of LED lamps can realize various dynamic graphic display effects. Specifically, it has many effects, such as multiple LED lights flashing after being lit in sequence, multiple LED lights flashing after being lit at the same time, multiple LED lights dimming after being lit in sequence, multiple LED lights dimming after being lit at the same time, or multiple LED lights dimming after being lit at the same time, etc. The LED programmable controller can achieve the above dynamic display effect only by changing the lighting time of each LED lamp 2. Dynamic illumination of a plurality of LED lamps is mapped on the canvas 5 to illuminate patterns on the canvas 5,
[In order to improve the authorization rate, I added this part, which will not affect your coverage. You can delete it if you think it is inappropriate. In this embodiment, the programmable picture display device further comprises a canvas fixing part 6, and the canvas fixing part 6 unfolds and fixes the canvas 5 on the light emitting sides of a plurality of LED lamps. In this embodiment, the canvas fixing member 6 is a cabo frame made of aluminum alloy. However, the present invention is not limited to this.
In order to have a better energy-saving effect, in other embodiments, the programmable picture display device may further include a photosensitive sensor, which is electrically connected with the LED programmable controller. When the light sensor detects the light change, in order to have a better pattern display effect, the light sensor outputs the detected light signal to the LED programmable controller, and the LED programmable controller changes the current output value of the constant current driving circuit. For example, when the lamp turns bright, the LED programmable controller reduces the adjusting resistance value of the constant current driving current, so that the LED lamp has higher brightness, better pattern display effect and better energy saving effect.
To sum up, that programmable pattern display device provide by the invention adopts a plurality of LED lamp to replace luminescent powder and silver paste in the traditional EL dynamic light box, and has good luminous brightness, and the luminous brightness of the LED lamps can be adjust by a constant current driving circuit, so that the programmable pattern display device is not only suitable for dim light environment, but also suitable for light areas in MingLiang Yu, and has good pattern display effect. In addition, the programmable pattern display device provided by the invention does not contain substances harmful to human body, and has good use safety. The programmable pattern display device provided by the invention adopts a programming mode to change the luminous time, luminous brightness and luminous frequency of each LED lamp, and realizes a dynamic display effect. The display device of the invention adopts a programmable mode, and the display effect can be changed at will as required.
Although the present invention has been disclosed by preferred embodiments, it is not meant to limit the present invention. Anyone familiar with this technology can make some changes and modifications without departing from the spirit and scope of the invention, so the scope of protection of the invention should be based on the scope claimed in the claims.
The patent for this invention is provided by Birdman Optoelectronics.
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