CN214796719U - Energy-saving circuit structure of common-cathode LED display screen - Google Patents
Energy-saving circuit structure of common-cathode LED display screen Download PDFInfo
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Abstract
The utility model discloses a common-cathode LED display screen energy-saving circuit structure, which comprises a switch power supply and a constant current driving module, the LED display panel comprises an LED display panel and a line scanning control module, wherein a first output end of a switch power supply outputs 2.8V-3.2V voltage, a second output end outputs 3.8V-4.2V voltage, a first constant current driving chip set of a constant current driving module is connected with the first output end of the switch power supply, a second constant current driving chip set and a third constant current driving chip set are connected in parallel and connected with a second output end of the switch power supply, the first constant current driving chip set is connected with a red light channel of the LED display panel, the second constant current driving chip set and the third constant current driving chip set are respectively connected with a green light channel and a blue light channel, an anode of an LED lamp bead of the LED display panel is connected with the constant current driving module, a cathode of the LED display panel is connected with the line scanning control module in parallel, and the line scanning control module is connected with a cathode of the switch power supply. The utility model discloses not only guarantee the normal work of lamp pearl, very big promotion luminous efficiency moreover has reduced useless power, has reduced generating heat and the temperature rise of device.
Description
Technical Field
The utility model belongs to the technical field of the LED display screen, especially, relate to a totally-overcast LED display screen energy-saving circuit structure.
Background
The LED outdoor display screen is currently applied to various fields, including outdoor advertisements, enterprises and public institutions, stage backgrounds, scenic spot special effect transparent screens and the like. The LED display screen can display colorful patterns because the LED display screen is composed of tens of thousands or even hundreds of thousands of groups of red, green and blue LEDs, and when any color of LED fails, the whole visual effect of the display screen can be influenced. Most of LED outdoor display screen are for being totally positive 5V power supply on the existing market, the lamp pearl that adopts is for totally positive RGB trinity lamp pearl, LED ruddiness lamp pearl (R) promptly, LED green glow lamp pearl (G) and LED blue light lamp pearl (B) have all adopted the 5V power supply, adopt this kind of power supply mode can be with unnecessary voltage (voltage drop) consumption conversion heat energy loss behind the constant current chip, and this kind of power supply mode is simple to display screen power supply's requirement moreover, LED module PCB wiring is convenient. However, the power supply voltage of the red (R) lamp bead of the LED is about 2V, the power supply voltage of the green (G) lamp bead and the blue (B) lamp bead of the LED is about 3V, and the LED display screen powered by a common-anode mode of 5V has more useless power, so that the luminous efficiency is low, and energy is not saved. When the LED display screen has more useless power, the useless power is converted into heat, the temperature in the constant current chip and the whole display screen box body is greatly improved, the product reliability and the service life of the LED display screen are influenced, in addition, the LED display screen needs large heat dissipation conditions, a large amount of useless power needs larger radiator volume, larger lamp box volume or more heat dissipation fans and the like, and the installation cost is increased.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention is expected to provide a common-cathode energy-saving circuit structure for LED display screen to solve the problem that the LED display screen powered by the common-anode mode has more useless power, resulting in low luminous efficiency and not energy saving.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
a totally-shaded LED display screen energy-saving circuit structure comprises:
the input end of the switching power supply is electrically connected with 220V alternating current, and the switching power supply comprises a first output end and a second output end, wherein the output voltage of the first output end of the switching power supply is 2.8V-3.2V, and the output voltage of the second output end of the switching power supply is 3.8V-4.2V;
the constant current driving module comprises a first constant current driving chip set, a second constant current driving chip set and a third constant current driving chip set, wherein the input end of the first constant current driving chip set is connected with the first output end of the switching power supply, and the input ends of the second constant current driving chip set and the third constant current driving chip set are connected in parallel and are respectively connected with the second output end of the switching power supply; the LED display panel comprises a plurality of LED lamp beads, anodes of the LED lamp beads are connected with the constant current driving module, and cathodes of the LED lamp beads are connected in parallel to form a common cathode of the LED lamp beads;
the input end of the line scanning control module is connected with the negative electrode of the switching power supply, and the output end of the line scanning control module is connected with the LED display panel;
the output end of the first constant current driving chip set is connected with a red light channel of the LED display panel, the output end of the second constant current driving chip set is connected with a green light channel of the LED display panel, and the output end of the third constant current driving chip set is connected with a blue light channel of the LED display panel.
According to the utility model discloses a specific embodiment, first constant current drive chipset includes a plurality of series connection's first constant current drive IC, and second constant current drive chipset includes a plurality of series connection's second constant current drive IC, and third constant current drive chipset includes a plurality of series connection's third constant current drive IC.
According to the utility model discloses a specific embodiment, a plurality of first constant current drive ICs realize serial connection through first serial input pin and first serial output pin, and a plurality of second constant current drive ICs realize serial connection through second serial input pin and second serial output pin, and a plurality of third constant current drive ICs realize serial connection through third serial input pin and third serial output pin.
According to the utility model discloses a concrete embodiment, LED lamp pearl is the trinity lamp pearl of RGB, includes ruddiness lamp pearl, green glow lamp pearl and blue light lamp pearl respectively, and a plurality of first constant current drive IC's output pin is connected with the ruddiness lamp pearl of LED display panel, and a plurality of second constant current drive IC's output pin is connected with the green glow lamp pearl of LED display panel, and a plurality of third constant current drive IC's output pin is connected with the blue light lamp pearl of LED display panel.
According to the utility model discloses a concrete embodiment, the line is swept control module and is swept IC including a plurality of lines, and IC serial connection is swept to a plurality of lines.
According to a specific embodiment of the present invention, a plurality of row scan ICs realize serial connection through serial input pin and serial output pin.
According to the utility model discloses a concrete embodiment, a plurality of output pins of sweeping IC are connected with the common cathode of a plurality of LED lamp pearls respectively.
According to a specific embodiment of the present invention, the switching power supply is used for converting 220V ac power into dc power and supplying the dc power to the circuit through the first output terminal and the second output terminal respectively.
Compared with the prior art, the utility model discloses a LED lamp pearl is totally the trinity lamp pearl of cloudy power supply RGB, and the red light divide into 2 groups supply voltage with green blue light passageway: the power supply voltage of a red light bead loop is 2.8-3.2V; the power supply voltage of the green and blue light lamp bead loop is 3.8-4.2V. Under the condition of power supply in the mode, normal work of the lamp beads is guaranteed, the luminous efficiency is greatly improved, the useless power is reduced, and heating and temperature rise of devices are reduced. The utility model discloses a circuit has increased the utilization ratio of electric energy 20% ~34% on the display screen of conventional power supply, very big promotion the luminous efficacy of display screen. Compared with the conventional common-sun display screen, the display screen has the following advantages:
1. the power required is lower for the same brightness.
2. And has higher brightness when the power is equal.
3. The same size of the lamp box has better heat dissipation effect.
4 the lamp box can be made thinner and lighter in size with the same power.
Drawings
Fig. 1 is a schematic diagram of an energy-saving circuit structure of a common cathode LED display screen according to an embodiment of the present invention.
Fig. 2 is a schematic view of a connection structure of a common cathode of lamp beads provided by an embodiment of the present invention.
Fig. 3 is a partial schematic view of the lamp bead common cathode connection provided by the embodiment of the present invention.
Fig. 4 is a schematic diagram of a row scan IC connection according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a constant current IC connection provided by an embodiment of the present invention.
Reference numerals:
1-a switching power supply; 2-constant current driving module; 3-an LED display panel; 4-a line scanning control module; 5-LED lamp beads;
201-a first constant current driving chip set; 202-a second constant current driving chip set; 203-third constant current drive chip set.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments in order to make the concept and idea of the present invention more clearly understood by those skilled in the art. It is to be understood that the embodiments presented herein are only a few of all embodiments that the present invention may have. Those skilled in the art who review this disclosure will readily appreciate that many modifications, variations, and alternatives to those embodiments described below, in whole or in part, are possible and are contemplated as falling within the scope of the claimed invention.
As used herein, the terms "first," "second," and the like are not intended to imply any order, quantity, or importance, but rather are used to distinguish one element from another. As used herein, the terms "a," "an," and the like are not intended to mean that there is only one of the described items, but rather that the description is directed to only one of the described items, which may have one or more. As used herein, the terms "comprises," "comprising," and other similar words are intended to refer to logical interrelationships, and are not to be construed as referring to spatial structural relationships. For example, "a includes B" is intended to mean that logically B belongs to a, and not that spatially B is located inside a. Furthermore, the terms "comprising," "including," and other similar words are to be construed as open-ended, rather than closed-ended. For example, "a includes B" is intended to mean that B belongs to a, but B does not necessarily constitute all of a, and a may also include C, D, E and other elements.
The terms "embodiment," "present embodiment," "an embodiment," "one embodiment," and "one embodiment" herein do not mean that the pertinent description applies to only one particular embodiment, but rather that the description may apply to yet another embodiment or embodiments. It will be understood by those skilled in the art that any description made herein of one embodiment may be substituted, combined, or otherwise combined with the description made herein with respect to one or more other embodiments, and that the resulting new embodiments may be readily envisioned by those skilled in the art, and fall within the scope of the present disclosure.
Example 1
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention. Referring to fig. 1-5, the present invention provides the following technical solutions:
a totally-shaded LED display screen energy-saving circuit structure comprises:
the switching power supply 1 comprises a first output end and a second output end, wherein the input end of the switching power supply 1 is connected with 220V alternating current, the switching power supply 1 comprises the first output end and the second output end, the output voltage of the first output end of the switching power supply 1 is 2.8V-3.2V, and the output voltage of the second output end of the switching power supply 1 is 3.8V-4.2V;
the constant current driving module 2, the constant current driving module 2 includes a first constant current driving chipset 201, a second constant current driving chipset 202 and a third constant current driving chipset 203, the input end of the first constant current driving chipset 201 is connected with the first output end of the switching power supply 1, and the input ends of the second constant current driving chipset 202 and the third constant current driving chipset 203 are connected in parallel and are respectively connected with the second output end of the switching power supply 1; the LED display panel 3 comprises a plurality of LED lamp beads 5, anodes of the LED lamp beads 5 are connected with the constant current driving module 2, and cathodes of the LED lamp beads 5 are connected in parallel to form a common cathode of the LED lamp beads 5;
and the input end of the line scanning control module 4 is connected with the negative electrode of the switching power supply 1, and the output end of the line scanning control module 4 is connected with the LED display panel 3.
The output end of the first constant current driving chip set 201 is connected with a red light channel of the LED display panel 3, the output end of the second constant current driving chip set 202 is connected with a green light channel of the LED display panel 3, and the output end of the third constant current driving chip set 203 is connected with a blue light channel of the LED display panel 3;
specifically, the switching power supply 1 is configured to convert 220V ac mains power into dc power and supply the dc power to the circuit through the first output terminal and the second output terminal. Because the supply voltage of LED ruddiness lamp pearl is about 2V, and the supply voltage of green glow lamp pearl and blue light lamp pearl is about 3V, consequently the embodiment of the utility model provides a convert 220V alternating current commercial power into two sets of direct currents respectively to ruddiness lamp pearl return circuit and blue light, green glow lamp pearl return circuit power supply, wherein the output voltage of first output is 2.8~3.2V for to ruddiness lamp pearl return circuit power supply, the output voltage of second output is 3.8~4.2V, be used for to blue light, green glow lamp pearl return circuit power supply. By adopting the power supply mode, the normal work of the lamp bead is ensured, the luminous efficiency is greatly improved, the useless power is reduced, and the heating and temperature rise of the device are reduced.
Specifically, the constant current driving module 2 is configured to output a constant current to drive the LED display panel 3. The first constant current driving chipset 201 of the constant current driving module 2 is configured to drive red light beads on the LED display panel 3 according to a constant current signal R, the first constant current driving chipset 201 includes a plurality of first constant current driving ICs connected in series, the second constant current driving chipset 202 is configured to drive green light beads on the LED display panel 3 according to a constant current signal G, the second constant current driving chipset 202 includes a plurality of second constant current driving ICs connected in series, the third constant current driving chipset 203 is configured to drive blue light beads on the LED display panel 3 according to a constant current signal B, and the third constant current driving chipset 203 includes a plurality of third constant current driving ICs connected in series. The plurality of first constant current driver ICs are connected in series through the first serial input pin and the first serial output pin, the plurality of second constant current driver ICs are connected in series through the second serial input pin and the second serial output pin, and the plurality of third constant current driver ICs are connected in series through the third serial input pin and the third serial output pin.
Specifically, LED lamp pearl 5 on the LED display panel 3 is the trinity lamp pearl of RGB, includes ruddiness lamp pearl, green glow lamp pearl and blue light lamp pearl respectively, and a plurality of first constant current driver IC's output pin is connected with LED display panel 3's ruddiness lamp pearl, and a plurality of second constant current driver IC's output pin is connected with LED display panel 3's green glow lamp pearl, and a plurality of third constant current driver IC's output pin is connected with LED display panel 3's blue light lamp pearl.
Specifically, the line scanning control module 4 is configured to control the LED lamp beads in the corresponding line of the unit display panel to be turned on and off according to the line scanning signal. The row scan control module 4 includes a plurality of row scan ICs connected in series. The plurality of row scan ICs are serially connected through a serial input pin and a serial output pin. And a plurality of output pins of the row scanning IC are respectively connected with the common cathode of the LED lamp beads.
Example 2
With reference to fig. 1 to fig. 5, the following describes a structure of an energy-saving circuit of a common-cathode LED display screen in detail according to an embodiment of the present invention. It should be noted that this embodiment is described as a specific embodiment, and the specific implementation is not limited to this.
The utility model discloses LED display panel 3 comprises 364 trinity lamp pearls of RGB, the pixel matrix who 14 rows of 26 rows are arranged into to this 364 LED lamp pearl 5, every LED lamp pearl 4 contains ruddiness lamp pearl, green glow lamp pearl and blue light lamp pearl, wherein the ruddiness lamp pearl of 1 st row marks R1~ R14 in proper order, the green glow lamp pearl of 1 st row marks G1~ G14 in proper order, the blue light lamp pearl of 1 st row marks B1~ B14 in proper order, the ruddiness lamp pearl of 2 nd row marks R15~ R28 in proper order, the green glow lamp pearl of 2 nd row marks G15~ G28 in proper order, the blue light lamp pearl of 2 nd row marks B15~ B28 in proper order, so on, the analogize, the ruddiness the red light lamp pearl of 26 th row marks R351~ R364 in proper order, the green glow lamp pearl of 26 nd row marks G351~ G364 in proper order, the blue light lamp pearl of 26 nd row marks B351~ B364 in proper order.
The input end of the switch power supply 1 of the embodiment of the utility model is connected with 220V alternating current, the first output end of the switch power supply 1 is connected with the first constant current driving chip set 201 of the constant current driving module 2, the output voltage of the first output end is 2.8V-3.2V, the second output end of the switch power supply 1 is connected with the second constant current driving chip set 202 and the third constant current driving chip set 203 which are connected with the constant current driving module 2 IN parallel, the output voltage of the second output end is 3.8V-4.2V, wherein the first constant current driving chip set 201 is used for driving the red light lamp beads of the LED display panel 3, the second constant current driving chip set 202 is used for driving the green light lamp beads of the LED display panel 2, the third constant current driving chip set 203 is used for driving the blue light lamp beads of the LED display panel 3, the first constant current driving chip set 201 is composed of 26 driving chips with models of ICN2049, as shown IN figure 5, each driving chip realizes serial connection through a serial input port SER IN and a serial output port SER OUT, the output ends OUT0~ OUT13 of the 1 st driving chip UR1 are sequentially connected with the red light beads R1~ R14 of the 1 st column of the LED display panel, the output ends OUT0~ OUT13 of the 2 nd driving chip UR2 are sequentially connected with the red light beads R15~ R28 and … … of the 2 nd column of the LED display panel, and the output ends OUT0~ OUT13 of the 26 th driving chip UR26 are sequentially connected with the red light beads R351~ R364 of the 26 th column of the LED display panel. The second constant current driving chip set 202 is composed of 26 driving chips of which the models are ICN2049, each driving chip is connected IN series through a serial input port SER IN and a serial output port SER OUT, output ends OUT 0-OUT 13 of a 1 st driving chip UG1 are sequentially connected with green light lamp beads G1-G14 of a 1 st column of the LED display panel, output ends OUT 0-OUT 13 of a 2 nd driving chip UG2 are sequentially connected with green light lamp beads G15-G28 and G … … of a 2 nd column of the LED display panel, and output ends OUT 0-OUT 13 of a 26 th driving chip UG26 are sequentially connected with green light lamp beads G351-G364 of a 26 th column of the LED display panel. The third constant current driving chip set 203 is composed of 26 driving chips of which the models are ICN2049, each driving chip is connected IN series through a serial input port SER IN and a serial output port SER OUT, the output ends OUT 0-OUT 13 of the 1 st driving chip UB1 are sequentially connected with blue light lamp beads B1-B14 of the 1 st column of the LED display panel, the output ends OUT 0-OUT 13 of the 2 nd driving chip UB2 are sequentially connected with blue light lamp beads B15-B28 and B … … of the 2 nd column of the LED display panel, and the output ends OUT 0-OUT 13 of the 26 th driving chip UB26 are sequentially connected with blue light lamp beads B351-B364 of the 26 th column of the LED display panel.
The utility model discloses the LED display panel is arranged into 14 lines of 26 pixel matrix by 364 LED lamp pearls, the LED lamp pearl negative pole of every line is parallelly connected, form 14 LED lamp strings of sharing the negative pole, the sharing negative pole of every line LED lamp string marks in proper order and is H1~ H14, it connects gradually to share negative pole H1~ H8 to correspond to the first line output pin OUT0~ OUT7 of sweeping the IC, it connects gradually to share negative pole H9~ H14 to correspond to the second line output pin OUT0~ OUT5 of sweeping the IC, wherein the output SDO of sweeping the IC of first line is connected with the input SDI of sweeping the IC of second line. The output end SDO of the second row-scan IC is suspended, and the first row-scan IC and the second row-scan IC are grounded through a GND pin so as to realize the negative connection with the switching power supply.
The embodiment of the utility model provides a theory of operation as follows:
the embodiment of the utility model provides a convert the 220V alternating current into two way direct currents through switching power supply, and transmit for constant current drive module through first output and second output respectively, wherein the output voltage of first output is 2.8V-3.2V, carry for first constant current drive chipset, be used for to red light lamp pearl return circuit output constant current, the output voltage of second output is 3.8V-4.2V, carry respectively for second constant current drive chipset and third constant current drive chipset, be used for to green glow lamp pearl return circuit and blue light pearl return circuit output constant current, adopt this kind of power supply mode, not only guarantee the normal work of lamp pearl, and very big promotion luminous efficiency, the useless power has been reduced, the heating and the temperature rise of device have been reduced. The cathodes of the lamp beads in each row of the LED display panel are connected in parallel to obtain 14 common cathodes of the LED lamp strings in total, each common cathode is connected to an output pin of the row scanning IC, and the row scanning IC lights the LED lamp strings in the corresponding row according to the row scanning signal. The driving method of the LED display panel comprises static scanning and dynamic scanning. In a certain display area, the proportion of the number of lines which are simultaneously lighted to the number of lines in the whole area is called a scanning mode, indoor and outdoor single-color and double-color scanning is generally 1/16, and indoor and outdoor full-color LED display screens are generally 1/8.
To sum up, the utility model discloses a LED lamp pearl is totally the trinity lamp pearl of cloudy power supply RGB, and the red light divide into 2 groups supply voltage with green blue light passageway: the power supply voltage of a red light bead loop is 2.8-3.2V; the power supply voltage of the green and blue light lamp bead loop is 3.8-4.2V. Under the condition of power supply in the mode, normal work of the lamp beads is guaranteed, the luminous efficiency is greatly improved, the useless power is reduced, and heating and temperature rise of devices are reduced. The utility model discloses a circuit has increased the utilization ratio of electric energy 20% ~34% on the display screen of conventional power supply, very big promotion the luminous efficacy of display screen. Compared with the conventional common-sun display screen, the display screen has the following advantages:
1. the power required is lower for the same brightness.
2. And has higher brightness when the power is equal.
3. The same size of the lamp box has better heat dissipation effect.
4 the lamp box can be made thinner and lighter in size with the same power.
The concepts, principles and concepts of the present invention have been described above in detail in connection with specific embodiments (including examples and illustrations). It should be understood by those skilled in the art that the embodiments of the present invention may be embodied in many different forms and that various changes, modifications, substitutions and equivalents of the steps, methods, devices and components described in the above embodiments may be made by those skilled in the art after reading the present specification and should be considered as falling within the scope of the present invention. The protection scope of the present invention is subject to the claims only.
Claims (8)
1. The utility model provides a totally-shaded LED display screen energy-saving circuit structure which characterized in that includes:
the input end of the switching power supply is electrically connected with 220V alternating current, and the switching power supply comprises a first output end and a second output end, wherein the output voltage of the first output end of the switching power supply is 2.8V-3.2V, and the output voltage of the second output end of the switching power supply is 3.8V-4.2V;
the constant current driving module comprises a first constant current driving chip set, a second constant current driving chip set and a third constant current driving chip set, wherein the input end of the first constant current driving chip set is connected with the first output end of the switching power supply, and the input ends of the second constant current driving chip set and the third constant current driving chip set are connected in parallel and are respectively connected with the second output end of the switching power supply;
the LED display panel comprises a plurality of LED lamp beads, anodes of the LED lamp beads are connected with the constant current driving module, and cathodes of the LED lamp beads are connected in parallel to form a common cathode of the LED lamp beads;
the input end of the line scanning control module is connected with the negative electrode of the switching power supply, and the output end of the line scanning control module is connected with the LED display panel;
the output end of the first constant current driving chip set is connected with a red light channel of the LED display panel, the output end of the second constant current driving chip set is connected with a green light channel of the LED display panel, and the output end of the third constant current driving chip set is connected with a blue light channel of the LED display panel.
2. The energy-saving circuit structure of a common cathode LED display screen of claim 1, wherein the first constant current driving chip set comprises a plurality of first constant current driving ICs connected in series, the second constant current driving chip set comprises a plurality of second constant current driving ICs connected in series, and the third constant current driving chip set comprises a plurality of third constant current driving ICs connected in series.
3. The energy-saving circuit structure of a common cathode LED display screen of claim 2, wherein a plurality of the first constant current driver ICs are connected in series through a first serial input pin and a first serial output pin, a plurality of the second constant current driver ICs are connected in series through a second serial input pin and a second serial output pin, and a plurality of the third constant current driver ICs are connected in series through a third serial input pin and a third serial output pin.
4. The energy-saving circuit structure of a common-cathode LED display screen of claim 2, wherein the LED lamp beads are RGB three-in-one lamp beads and respectively comprise red light lamp beads, green light lamp beads and blue light lamp beads, a plurality of output pins of the first constant current drive ICs are connected with the red light lamp beads of the LED display panel, a plurality of output pins of the second constant current drive ICs are connected with the green light lamp beads of the LED display panel, and a plurality of output pins of the third constant current drive ICs are connected with the blue light lamp beads of the LED display panel.
5. The energy-saving circuit structure of a common cathode LED display screen of claim 1, wherein the row scan control module comprises a plurality of row scan ICs, and a plurality of the row scan ICs are connected in series.
6. The power-saving circuit structure of a common cathode LED display screen of claim 5, wherein a plurality of the line scan ICs are connected in series through a serial input pin and a serial output pin.
7. The energy-saving circuit structure of a common-cathode LED display screen of claim 5, wherein a plurality of output pins of the row-scan IC are respectively connected with common cathodes of a plurality of LED lamp beads.
8. The energy-saving circuit structure of a common cathode LED display screen of claim 1, wherein the switching power supply is used for converting the 220V alternating current into direct current and supplying the direct current to the circuit through the first output terminal and the second output terminal respectively.
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| CN202120479624.1U CN214796719U (en) | 2021-03-05 | 2021-03-05 | Energy-saving circuit structure of common-cathode LED display screen |
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| CN202120479624.1U CN214796719U (en) | 2021-03-05 | 2021-03-05 | Energy-saving circuit structure of common-cathode LED display screen |
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