CN211557547U

CN211557547U - Display circuit

Info

Publication number: CN211557547U
Application number: CN202020611621.4U
Authority: CN
Inventors: 曹春权; 吴涛; 鄢来飞
Original assignee: Shenzhen Tailong Vision Technology Co ltd
Current assignee: Shenzhen Tailong Vision Technology Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-09-22
Anticipated expiration: 2030-04-21

Abstract

The utility model relates to a display device technical field, its aim at provides a display circuit. The adopted technical scheme is as follows: a display circuit comprises a control module, a display module and a power supply module; the display module comprises a plurality of LED lamps, the LED lamps of the LED lamps are different in light emitting color, the control module is matched with the LED lamps of different light emitting colors, anodes of the LED lamps of different light emitting colors are respectively electrically connected with different control modules, cathodes of the LED lamps are electrically connected and form a common cathode, a power input end of the control module is electrically connected with the power module, and the common cathodes of the LED lamps are grounded. The utility model discloses the energy consumption is low, can effectively reduce the temperature of LED display screen.

Description

Display circuit

Technical Field

The utility model relates to a display device technical field especially relates to a display circuit.

Background

The LED display screen is a flat panel display, which is composed of small LED module panels, and is used to display various information such as text, images, video, etc. A plurality of LED lamps in traditional LED display screen generally set up to the form of being the power supply of sharing the sun, in the use, need give a voltage that is higher than 3.8V to a plurality of LED lamps usually, however, because the voltage requirement of red, green, blue three kinds of LED lamps is different, the setting of prior art, under the condition that the LED lamp is the booth apart from, easily cause LED display screen electric quantity loss big, service temperature height.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems existing in the prior art, the utility model provides a display circuit.

The utility model adopts the technical proposal that:

a display circuit comprises a control module, a display module and a power supply module; the display module comprises a plurality of LED lamps, the LED lamps of the LED lamps are different in light emitting color, the control module is matched with the LED lamps of different light emitting colors, anodes of the LED lamps of different light emitting colors are respectively electrically connected with different control modules, cathodes of the LED lamps are electrically connected and form a common cathode, a power input end of the control module is electrically connected with the power module, and the common cathodes of the LED lamps are grounded.

Preferably, the display circuit further comprises a switch module, one pole of the switch module is electrically connected with the common cathode of the plurality of LED lamps, and the other pole of the switch module is grounded.

Further preferably, the display circuit further comprises a driving module, wherein a power input end of the driving module is electrically connected with the power module; the controlled pole of the switch module is electrically connected with the signal output pole of the driving module, the first wiring pole of the switch module is electrically connected with the common cathode of the plurality of LED lamps, and the second wiring pole of the switch module is grounded.

Further preferably, the driving module is implemented by using a chip with the model number of ICND 2019.

Further preferably, the switch module is implemented by using an N-type MOS transistor, a gate of the switch module is electrically connected to a signal output electrode of the driving module, a drain of the switch module is electrically connected to a common cathode of the plurality of LED lamps, and a source electrode of the switch module is grounded.

Preferably, the control module is implemented by a chip with the model of ICN 2069.

Preferably, the power supply module comprises a power socket and a signal amplification module electrically connected with the power socket.

Preferably, the signal amplification module is implemented by a digital chip with a model 74LS 245.

Preferably, the plurality of LED lamps are miniLED lamps.

Preferably, the display module is provided with a plurality of groups.

The beneficial effects of the utility model are that the appearance is concentrated, the energy consumption is low, can effectively reduce the temperature of LED display screen. Particularly, the utility model discloses in the use, control module's power input end is connected with the power module electricity, and different control module's control end is connected with the positive pole electricity of the LED lamp of different luminous colours in the display module respectively, and power module is to display module's public negative pole input current, adjustable control module's output voltage to light the LED lamp of different colours in the display module. The utility model discloses in, the public negative pole of a plurality of LED lamps is as current input end, can effectively reduce the consumption, does benefit to the temperature that reduces the LED display screen to promote the life-span of LED display screen, be applicable to the booth apart from LED lamp.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of a control module in embodiment 1;

fig. 2 is a schematic circuit diagram of a display module and a switch module in embodiment 1;

fig. 3 is a schematic circuit diagram of a driving module in embodiment 1;

fig. 4 is a schematic circuit diagram of the power outlet in embodiment 1;

fig. 5 is a schematic circuit diagram of a signal amplification block in embodiment 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of example embodiments of the present invention.

It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments of the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, and/or groups thereof.

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example 1:

the embodiment provides a display circuit, which comprises a control module, a display module and a power module, wherein the circuit schematic diagram of the control module is shown in fig. 1, and the circuit schematic diagram of the display module is shown in fig. 2; the display module comprises a plurality of LED lamps, and the LED lamps have different light emitting colors, it should be understood that the light emitting colors of the LED lamps are different, or some of the LED lamps have the same color, which is not limited herein; the LED lamp that control module cooperation different luminous colour is provided with a plurality ofly, and the positive pole of the LED lamp of different luminous colour is connected with different control module electricity respectively, and the negative pole electricity of a plurality of LED lamps is connected and is formed public negative pole, control module's power input end is connected with the power module electricity, and the public negative pole ground connection of a plurality of LED lamps.

The energy consumption of the embodiment is low, and the temperature of the LED display screen can be effectively reduced. Specifically, in the implementation process of this embodiment, the power input end of the control module is electrically connected to the power module, the control ends of different control modules are respectively electrically connected to the anodes of the LED lamps with different light emitting colors in the display module, and the power module inputs current to the common cathode of the display module, so as to adjust the output voltage of the control module, thereby lighting the LED lamps with different colors in the display module. In this embodiment, the public negative pole of a plurality of LED lamps is as current input end, can effectively reduce the consumption, does benefit to the temperature that reduces the LED display screen to promote the life-span of LED display screen, be applicable to the booth apart from LED lamp.

Specifically, in this embodiment, as shown in fig. 2, the display modules are provided in plurality, each display module includes three LED lamps, the light emitting colors of the three LED lamps are red, green, and blue, the control module is provided in three in cooperation with the three LED lamps, the input voltages of the three control modules are different, as shown in fig. 1, the input voltage of the control module UR1 in cooperation with the red LED lamp is 2.8V, and the input voltages of the control module UG1 in cooperation with the green LED lamp and the control module UB1 in cooperation with the blue LED lamp are both 3.8V.

In this embodiment, the control module is implemented by using a chip with an ICN2069 model. Specifically, ICN2069 is a driving IC, which is a 16-way PWM output, and GND is a ground terminal; SDI is a serial data input end; DCLK is data clock for writing data and command; LE is the latch end according to and order, different LE length stands for different orders; OUT 0-OUT 15 are constant current output terminals; ROW is a line feed signal, and the ROW signal changes from 0 to 1 to represent line feed once; SDO is a serial data output end; REXT is an external resistor input end, the constant current value of the output end can be adjusted, the output current range is 0.5-10 mAx16 when the voltage is 2.8V, and the output current is 0.5-12 mAx16 when the voltage is 3.8V; VDD is a power input end, and the power supply voltage range of the IC is Vdd equal to 2.8-5.5V.

In this embodiment, as shown in fig. 2, the display circuit further includes a switch module, one pole of the switch module is electrically connected to the common cathode of the plurality of LED lamps, and the other pole of the switch module is grounded. When the LED lamp is turned off, residual charges in the circuit can be rapidly released through the switch module, so that shadows caused by the fact that the residual charges continuously flow through the LED lamp in the forward direction are avoided, meanwhile, the switch module is in a reverse breakdown working state, partial voltage can be shared, damage to the LED lamp caused by surge due to high-speed switching of the circuit is greatly reduced, the LED lamp is protected, meanwhile, leakage current is reduced, and the phenomenon of trailing display of an LED display screen is avoided.

Furthermore, the display circuit also comprises a driving module, wherein a power supply input end of the driving module is electrically connected with the power supply module; the controlled pole of the switch module is electrically connected with the signal output pole of the driving module, the first wiring pole of the switch module is electrically connected with the common cathode of the plurality of LED lamps, and the second wiring pole of the switch module is grounded.

In this embodiment, the switch module is implemented by using an N-type MOS transistor, a gate of the switch module is electrically connected to a signal output electrode of the driving module, a drain of the switch module is electrically connected to a common cathode of the plurality of LED lamps, and a source electrode of the switch module is grounded. It should be understood that the switch module may also be implemented by a switch such as a transistor, and the switch module may be specifically determined according to the number of the display modules.

Specifically, as shown in fig. 3, the driving module is implemented by a chip U2 with model number ICND 2019. In this embodiment, the display modules are provided with a plurality of groups, each group of display modules is provided with a plurality of LED lamps, and the plurality of groups of display modules are provided with a plurality of switch modules in a matching manner; pins 3 to 6 and pins 11 to 14 of the driving module are respectively and electrically connected with the gates of the plurality of switch modules, pin 1 of the driving module is grounded,

pins

2, 15 and 16 of the driving module are all electrically connected with the signal amplification module, pin 8 of the driving module is electrically connected with a power socket JP1, and pin 7 of the driving module is suspended. Specifically, the icdd 2019 is used for controlling the driving of the switch module of the display module, has a blanking function, and can protect the LED lamp at the same time, since the ICD2019 uses serial data transmission, in this embodiment, a plurality of driving modules are used for serial output.

In the present embodiment, as shown in fig. 4 and 5, the power supply module includes a power socket JP1 and a signal amplification module electrically connected to an output terminal of the power socket JP 1; the output end of the power socket JP1 is electrically connected with the power input end of the control module and the power input end of the driving module respectively, and the controlled pole of the driving module and the controlled pole of the control module are both electrically connected with the output end of the signal amplification module.

In this embodiment, as shown in fig. 5, the signal amplification module is implemented by a digital chip with a model 74LS245, which is used to solve the problem of unstable bus signals, and in the implementation process, the electrical signal input by the power socket JP1 may be amplified and then transmitted to the driving module and the control module, and the signal stability may be enhanced by amplifying the signal.

In this embodiment, the plurality of LED lamps are miniLED lamps. Specifically, the miniLED lamp is smaller, so that a more precise dynamic backlight effect of the display module can be realized, the screen brightness and the contrast are effectively improved, and meanwhile, the glare phenomenon caused by the fact that the traditional large bulb dynamic backlight is in the bright and dark areas of the screen can be inhibited.

The various embodiments described above are merely illustrative, and may or may not be physically separate, as they relate to elements illustrated as separate components; if reference is made to a component displayed as a unit, it may or may not be a physical unit, and may be located in one place or distributed over a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some technical features may still be made. Such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Finally, it should be noted that the present invention is not limited to the above-mentioned alternative embodiments, and that various other forms of products can be obtained by anyone in light of the present invention. The above detailed description should not be taken as limiting the scope of the invention, which is defined in the following claims, and which can be used to interpret the claims.

Claims

1. A display circuit, characterized by: the device comprises a control module, a display module and a power supply module; the display module comprises a plurality of LED lamps, the LED lamps of the LED lamps are different in light emitting color, the control module is matched with the LED lamps of different light emitting colors, anodes of the LED lamps of different light emitting colors are respectively electrically connected with different control modules, cathodes of the LED lamps are electrically connected and form a common cathode, a power input end of the control module is electrically connected with the power module, and the common cathodes of the LED lamps are grounded.

2. A display circuit according to claim 1, wherein: the display circuit further comprises a switch module, one pole of the switch module is electrically connected with the common cathode of the plurality of LED lamps, and the other pole of the switch module is grounded.

3. A display circuit according to claim 2, wherein: the display circuit further comprises a driving module, and a power supply input end of the driving module is electrically connected with the power supply module; the controlled pole of the switch module is electrically connected with the signal output pole of the driving module, the first wiring pole of the switch module is electrically connected with the common cathode of the plurality of LED lamps, and the second wiring pole of the switch module is grounded.

4. A display circuit according to claim 3, wherein: the driving module is realized by adopting a chip with the model of ICND 2019.

5. A display circuit according to claim 3 or 4, wherein: the LED lamp driving circuit is characterized in that the switch module is realized by adopting an N-type MOS tube, the grid electrode of the switch module is electrically connected with the signal output electrode of the driving module, the drain electrode of the switch module is electrically connected with the common cathode of the LED lamps, and the source electrode of the switch module is grounded.

6. A display circuit according to claim 1, wherein: the control module is realized by adopting a chip with the model of ICN 2069.

7. A display circuit according to claim 1, wherein: the power supply module comprises a power socket and a signal amplification module electrically connected with the power socket.

8. A display circuit according to claim 7, wherein: the signal amplification module is realized by adopting a digital chip with the model number of 74LS 245.

9. A display circuit according to claim 1, wherein: the LED lamps are miniLED lamps.

10. A display circuit according to claim 1, wherein: the display module is provided with a plurality of groups.