CN214177613U - LED drive circuit and LED display screen - Google Patents

LED drive circuit and LED display screen Download PDF

Info

Publication number
CN214177613U
CN214177613U CN202022632504.9U CN202022632504U CN214177613U CN 214177613 U CN214177613 U CN 214177613U CN 202022632504 U CN202022632504 U CN 202022632504U CN 214177613 U CN214177613 U CN 214177613U
Authority
CN
China
Prior art keywords
led
constant current
voltage
module
emitting diode
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202022632504.9U
Other languages
Chinese (zh)
Inventor
徐惠能
洪荣辉
林阳腾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujian Qiangli Photoelectricity Co Ltd
Original Assignee
Fujian Qiangli Photoelectricity Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujian Qiangli Photoelectricity Co Ltd filed Critical Fujian Qiangli Photoelectricity Co Ltd
Priority to CN202022632504.9U priority Critical patent/CN214177613U/en
Application granted granted Critical
Publication of CN214177613U publication Critical patent/CN214177613U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The utility model relates to a LED technical field provides LED drive circuit and LED display screen. An LED driver circuit comprising: an LED module; the row driving unit is connected between a power supply and the anode of the LED module; the constant current driving unit is connected between the negative electrode of the LED module and a reference ground; the control module is respectively connected with the row driving unit and the constant current driving unit; and the voltage conversion module is connected between the constant current driving unit and a reference ground. The utility model discloses a voltage conversion module can supply power to the emitting diode of different grade type, has realized that only need a power just can satisfy the emitting diode's of different voltages demand, and is rational in infrastructure, and the expansibility is stronger, has also reduced the cost of drop circuit design when reducing drive IC calorific capacity, has wide market perspective.

Description

LED drive circuit and LED display screen
Technical Field
The utility model relates to a LED technical field, more specifically the says so, relates to LED drive circuit and LED display screen.
Background
The LED has the advantages of low voltage, energy conservation, long service life and the like, and is widely applied in various fields at present. In recent years, the LED display screen is rapidly developed, the technology difficulty is continuously upgraded from the initial large-space low-definition display to the current small-space ultrahigh-definition indoor high-end display, the requirement on energy consumption is higher and higher, and the energy-saving scheme is more and more emphasized. In the prior art, the conventional 4.5V/5V voltage that uses supplies power for the module, and driver IC's calorific capacity becomes positive correlation rather than the pressure drop for whole LED circuit produces very high heat, makes LED display screen consumption high, and the display effect is because of the influence variation that the temperature risees, and the heat dissipation design of display screen needs to drop into very high cost, can not reach real energy-conserving effect.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a LED drive circuit and LED display screen.
The utility model discloses it reduces the consumption and the reduction in production cost of LED display screen to solve.
Compared with the prior art, the utility model discloses technical scheme and beneficial effect as follows:
an LED driver circuit comprising: an LED module; the row driving unit is connected between a power supply and the anode of the LED module; the constant current driving unit is connected between the negative electrode of the LED module and a reference ground; the control module is respectively connected with the row driving unit and the constant current driving unit; and the voltage conversion module is connected between the constant current driving unit and a reference ground.
As a further improvement, the LED module includes: more than one first light emitting diode, more than one second light emitting diode and more than one third light emitting diode; the row driving unit includes: the first row of driving chips are connected between the anode of the first light-emitting diode and the power supply; the second row driving chip is connected between the anode of the second light-emitting diode and the power supply; and the third row driving chip is connected between the anode of the third light-emitting diode and the power supply.
As a further improvement, the constant current driving unit includes: the first constant current driving chip is connected between the cathode of the first light emitting diode and a reference ground, the voltage conversion module is connected between the first constant current driving chip and the reference ground, and a power supply end of the voltage conversion module is connected with a power supply; the second constant current driving chip is connected between the cathode of the second light emitting diode and a reference ground; and the third constant current driving chip is connected between the cathode of the third light emitting diode and the reference ground.
As a further improvement, the constant current driving unit includes: the first constant current driving chip is connected between the cathode of the first light emitting diode and a reference ground; the second constant current driving chip is connected between the cathode of the second light emitting diode and a reference ground; the third constant current driving chip is connected between the negative electrode of the third light emitting diode and the reference ground; the voltage conversion module is connected between the second constant current driving chip and a reference ground, the voltage conversion module is connected between the third constant current driving chip and the reference ground, and a power supply end of the voltage conversion module is connected with a power supply.
As a further improvement, the voltage conversion module includes: a voltage conversion circuit; the output end of the feedback module is connected to the voltage conversion circuit, and the first input end of the feedback module is connected to the power supply; and the input end of the rectification filter module is connected to the output end of the voltage conversion circuit, the first output end of the rectification filter module is connected to the second input end of the feedback module, and the second output end of the rectification filter module is grounded.
As a further improvement, the first light emitting diode is a red light emitting diode, the second light emitting diode is a green light emitting diode, and the third light emitting diode is a blue light emitting diode.
As a further improvement, the input voltage of the voltage conversion module is a first voltage, and the conversion output voltage of the voltage conversion module is a second voltage, and the first voltage is higher than the second voltage.
As a further improvement, the input voltage of the voltage conversion module is a first voltage, and the conversion output voltage of the voltage conversion module is a second voltage, and the second voltage is higher than the first voltage.
An LED display screen, including LED drive circuit, still including: the packaging structure is used for packaging the LED driving circuit; and the control button is arranged on the packaging structure and is electrically connected with the LED driving circuit.
The utility model has the advantages that: the utility model adopts the combination of the LED module, the line driving unit, the constant current driving unit and the voltage conversion module, realizes the power supply of the light emitting diodes with different types through the voltage conversion module, and realizes the requirement that the light emitting diodes with different voltages can be satisfied by only one power supply; the structure of the drive control circuit of the utility model is more reasonable, and the drive control circuit is suitable for expanding LED modules with different lamp bead quantities; the voltage conversion module comprises a voltage conversion circuit, a rectification filter module and a feedback module, so that the heat productivity of the driving IC is reduced, the cost of the design of the voltage drop circuit is reduced, and the performance of the LED display screen is improved.
Drawings
Fig. 1 is a circuit diagram of a LED driving circuit according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a voltage conversion module according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of a LED driving circuit provided by the second embodiment of the present invention.
Fig. 4 is a circuit diagram of an LED driving circuit provided by the third embodiment of the present invention.
Fig. 5 is a circuit diagram of an LED driving circuit provided in the fourth embodiment of the present invention.
In the figure: 1, LED module 2/3/4/51/52, voltage conversion module 6, control module 7 and power supply
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined to clearly and completely describe the technical solutions of the embodiments of the present invention.
Referring to fig. 1 to 5, the LED driving circuit includes: an LED module 1; the row driving unit is connected between a power supply 7 and the anode of the LED module 1; the constant current driving unit is connected between the negative electrode of the LED module 1 and a reference ground; and the voltage conversion module is connected between the constant current driving unit and a reference ground. The utility model adopts the combination of the LED module 1, the line driving unit, the constant current driving unit and the voltage conversion module, realizes the power supply of the light emitting diodes with different types through the voltage conversion module, and realizes the requirement that the light emitting diodes with different voltages can be satisfied by only one power supply 7; the structure of the drive control circuit of the utility model is more reasonable, and the drive control circuit is suitable for expanding the LED modules 1 with different lamp bead quantities; the voltage conversion module comprises a voltage conversion circuit, a rectification filter module and a feedback module, so that the heat productivity of the driving IC is reduced, the cost of the design of the voltage drop circuit is reduced, and the performance of the LED display screen is improved.
Referring to fig. 1, 3, 4 and 5, the LED module 1 includes: more than one first light emitting diode, more than one second light emitting diode and more than one third light emitting diode; the row driving unit includes: the first row of driving chips are connected between the anode of the first light-emitting diode and the power supply 7; the second row driving chip is connected between the anode of the second light-emitting diode and the power supply 7; and the third row of driving chips are connected between the anode of the third light-emitting diode and the power supply 7.
In one embodiment, referring to fig. 1, the constant current driving unit includes: the first constant current driving chip is connected between the cathode of the first light emitting diode and a reference ground, the voltage conversion module 2 is connected between the first constant current driving chip and the reference ground, and a power supply end of the voltage conversion module 2 is connected with a power supply 7; the second constant current driving chip is connected between the cathode of the second light emitting diode and a reference ground; and the third constant current driving chip is connected between the cathode of the third light emitting diode and the reference ground.
Referring to fig. 1 to 2, the voltage conversion module 2 includes: a voltage conversion circuit; the output end of the feedback module is connected to the voltage conversion circuit, and the first input end of the feedback module is connected to the power supply 7; and the input end of the rectification filter module is connected to the output end of the voltage conversion circuit, the first output end of the rectification filter module is connected to the second input end of the feedback module, and the second output end of the rectification filter module is grounded.
Referring to fig. 1 to 5, the first light emitting diode is a red light emitting diode, the second light emitting diode is a green light emitting diode, and the third light emitting diode is a blue light emitting diode.
Referring to fig. 1, an input voltage of the voltage conversion module 2 is a first voltage, and a conversion output voltage of the voltage conversion module 2 is a second voltage, where the first voltage is higher than the second voltage. In the first embodiment, the first voltage is 3.8V, and the second voltage is 2.8V.
Referring to fig. 1, 3, 4 and 5, the LED driving circuit further includes a control module 6, and the control module 6 is respectively connected to the row driving unit and the constant current driving unit; the control module 6 is respectively connected to the first row driver chip and the first constant current driver chip, the control module 6 sends a first row signal to the first row driver chip, and the control module 6 sends a first driver signal to the first constant current driver chip; the control module 6 is respectively connected to the second row driving chip and the second constant current driving chip, the control module 6 sends a second row signal to the second row driving chip, and the control module 6 sends a second driving signal to the second constant current driving chip; the control module 6 is connected to the third row driver chip and the third constant current driver chip, respectively, the control module 6 sends a third row signal to the third row driver chip, and the control module 6 sends a third driver signal to the third constant current driver chip.
An LED display screen, including LED drive circuit, still including: the packaging structure is used for packaging the LED driving circuit; and the control button is arranged on the packaging structure and is electrically connected with the LED driving circuit.
In a second embodiment, referring to fig. 3, the constant current driving unit includes: the first constant current driving chip is connected between the cathode of the first light emitting diode and the voltage conversion module 4; the second constant current driving chip is connected between the cathode of the second light emitting diode and the voltage conversion module 4; the third constant current driving chip is connected between the cathode of the third light emitting diode and the voltage conversion module 4; the power end of the voltage conversion module 4 is connected with the power supply 7, and the ground end of the voltage conversion module 4 is connected with the reference ground.
Referring to fig. 3, the input voltage of the voltage conversion module 4 is a first voltage, and the conversion output voltage of the voltage conversion module 4 is a second voltage and a third voltage respectively, where the second voltage is used for driving a red light emitting diode, and the third voltage is used for driving a green light emitting diode and a blue light emitting diode. The third voltage is higher than the second voltage. In example two, the second voltage is 2.5V and the third voltage is 3.5V.
In a third embodiment, referring to fig. 4, the constant current driving unit includes: the first constant current driving chip is connected between the cathode of the first light emitting diode and a reference ground; the second constant current driving chip is connected between the cathode of the second light emitting diode and a reference ground; the third constant current driving chip is connected between the negative electrode of the third light emitting diode and the reference ground; one voltage conversion module 51 is connected between the second constant current driver chip and the reference ground, the other voltage conversion module 52 is connected between the third constant current driver chip and the reference ground, and a power supply end of the voltage conversion module 51/52 is connected to the power supply 7.
In a fourth embodiment, referring to fig. 5, the constant current driving unit includes: the first constant current driving chip is connected between the cathode of the first light emitting diode and a reference ground; the second constant current driving chip is connected between the cathode of the second light emitting diode and a reference ground; the third constant current driving chip is connected between the negative electrode of the third light emitting diode and the reference ground; the voltage conversion module 3 is connected between the second constant current driving chip and a reference ground, the voltage conversion module 3 is connected between the third constant current driving chip and the reference ground, and a power supply end of the voltage conversion module 3 is connected with a power supply 7.
Referring to fig. 4 and 5, the input voltage of the voltage conversion module 3/51/52 is a first voltage, and the conversion output voltage of the voltage conversion module 3/51/52 is a second voltage, which is higher than the first voltage. In the third and fourth embodiments, the first voltage is 2.0V and the second voltage is 3.0V.
It should be noted that, referring to fig. 1, the power supply terminal of the second constant current driving unit and the power supply terminal of the third constant current driving unit are both connected to the power supply 7. Referring to fig. 4 and 5, the power source terminal of the first constant current driving unit is connected to the power source 7.
The working principle, working process and the like of the present embodiment can refer to the corresponding contents of the foregoing embodiments.
The same or similar parts in the above embodiments in this specification may be referred to each other, and each embodiment is described with emphasis on differences from other embodiments, but the differences are not limited to be replaced or superimposed with each other.
The above examples are only for illustrating the technical solutions of the present invention and not for limiting the same. It will be understood by those skilled in the art that any modification and equivalent arrangement that do not depart from the spirit and scope of the invention should fall within the scope of the claims of the invention.

Claims (9)

  1. An LED driving circuit, comprising:
    an LED module;
    the row driving unit is connected between a power supply and the anode of the LED module;
    the constant current driving unit is connected between the negative electrode of the LED module and a reference ground;
    the control module is respectively connected with the row driving unit and the constant current driving unit;
    and the voltage conversion module is connected between the constant current driving unit and a reference ground.
  2. 2. The LED driving circuit according to claim 1, wherein the LED module comprises: more than one first light emitting diode, more than one second light emitting diode and more than one third light emitting diode; the row driving unit includes:
    the first row of driving chips are connected between the anode of the first light-emitting diode and the power supply;
    the second row driving chip is connected between the anode of the second light-emitting diode and the power supply;
    and the third row driving chip is connected between the anode of the third light-emitting diode and the power supply.
  3. 3. The LED driving circuit according to claim 2, wherein the constant current driving unit includes:
    the first constant current driving chip is connected between the cathode of the first light emitting diode and a reference ground, the voltage conversion module is connected between the first constant current driving chip and the reference ground, and a power supply end of the voltage conversion module is connected with a power supply;
    the second constant current driving chip is connected between the cathode of the second light emitting diode and a reference ground;
    and the third constant current driving chip is connected between the cathode of the third light emitting diode and the reference ground.
  4. 4. The LED driving circuit according to claim 2, wherein the constant current driving unit includes:
    the first constant current driving chip is connected between the cathode of the first light emitting diode and a reference ground;
    the second constant current driving chip is connected between the cathode of the second light emitting diode and a reference ground; the third constant current driving chip is connected between the negative electrode of the third light emitting diode and the reference ground; the voltage conversion module is connected between the second constant current driving chip and a reference ground, the voltage conversion module is connected between the third constant current driving chip and the reference ground, and a power supply end of the voltage conversion module is connected with a power supply.
  5. 5. The LED driving circuit according to claim 3 or 4, wherein the voltage conversion module comprises:
    a voltage conversion circuit;
    the output end of the feedback module is connected to the voltage conversion circuit, and the first input end of the feedback module is connected to the power supply;
    and the input end of the rectification filter module is connected to the output end of the voltage conversion circuit, the first output end of the rectification filter module is connected to the second input end of the feedback module, and the second output end of the rectification filter module is grounded.
  6. 6. The LED driving circuit according to claim 2, 3 or 4, wherein the first LED is a red LED, the second LED is a green LED, and the third LED is a blue LED.
  7. 7. The LED driving circuit according to claim 3, wherein the input voltage of the voltage conversion module is a first voltage, the conversion output voltage of the voltage conversion module is a second voltage, and the first voltage is higher than the second voltage.
  8. 8. The LED driving circuit according to claim 4, wherein the input voltage of the voltage conversion module is a first voltage, and the converted output voltage of the voltage conversion module is a second voltage, and the second voltage is higher than the first voltage.
  9. 9. An LED display panel, comprising the LED driving circuit according to any one of claims 1 to 8, further comprising: the packaging structure is used for packaging the LED driving circuit; and the control button is arranged on the packaging structure and is electrically connected with the LED driving circuit.
CN202022632504.9U 2020-11-13 2020-11-13 LED drive circuit and LED display screen Active CN214177613U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202022632504.9U CN214177613U (en) 2020-11-13 2020-11-13 LED drive circuit and LED display screen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202022632504.9U CN214177613U (en) 2020-11-13 2020-11-13 LED drive circuit and LED display screen

Publications (1)

Publication Number Publication Date
CN214177613U true CN214177613U (en) 2021-09-10

Family

ID=77600630

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202022632504.9U Active CN214177613U (en) 2020-11-13 2020-11-13 LED drive circuit and LED display screen

Country Status (1)

Country Link
CN (1) CN214177613U (en)

Similar Documents

Publication Publication Date Title
US7855515B2 (en) High-voltage high-power constant current LED driver device
CN101742771B (en) Portable type lamp, light dimming circuit and light dimming method
CN202404873U (en) Constant voltage and constant current drive circuit of LED display screen
CN104519633A (en) Undervoltage protective circuit for LED lamps
CN203761633U (en) Energy-saving LED traffic light with long service life
CN203896538U (en) LED driving power source employing single switch tube and two Buck-Boost circuits in cascade connection
CN202268152U (en) Backlight constant-current and constant-voltage driving circuit for display screen
CN100405319C (en) Computer state indicator light
CN214177613U (en) LED drive circuit and LED display screen
CN209165070U (en) A kind of modular plug-in type LED bulb lamp
CN112423435A (en) LED drive circuit and LED display screen
CN112466248A (en) LED drive circuit and LED display screen
CN217386636U (en) LED drive circuit
CN212906894U (en) LED display screen and electronic equipment
CN211606880U (en) LED differential pressure protection circuit, constant current drive circuit, drive board card and electronic equipment
CN210899726U (en) Trinity control interface circuit of lamps and lanterns
CN204168140U (en) IGBT drive module, motor drive controller and power-driven system
CN202738175U (en) LED voltage-boosting drive circuit
US8692476B2 (en) Boost circuit for LED backlight driver circuit
CN202652650U (en) Hybrid integrated LED constant-current power circuit
CN102568385A (en) Driving device, LED (light emitting diode) driving device and driving methods thereof
CN217470327U (en) Light emitting device
CN200950682Y (en) Novel highly effective low cost constant-current driver for LED lighting lamp
CN201119056Y (en) High light efficiency and high power LED lamp driving circuit
CN217788005U (en) Dimming circuit applied to TV backlight and TV backlight power supply circuit

Legal Events

Date Code Title Description
GR01 Patent grant
GR01 Patent grant