CN-121999717-A - Display driving circuit and display screen energy-saving equipment

CN121999717ACN 121999717 ACN121999717 ACN 121999717ACN-121999717-A

Abstract

The application discloses a display driving circuit and display screen energy-saving equipment, and relates to the technical field of display equipment, wherein the circuit comprises a first power supply module, a second power supply module and a third power supply module, wherein the first power supply module is connected to an anode of a red light emitting diode in an LED display unit and is used for providing a first working voltage for the red light emitting diode; the second power supply module is respectively connected with the anode of the green light emitting diode and the anode of the blue light emitting diode in the LED display unit and is used for providing a second working voltage for the green light emitting diode and the blue light emitting diode, the first working voltage is smaller than the second working voltage, and the driving module is respectively connected with the cathode of the red light emitting diode, the cathode of the green light emitting diode and the cathode of the blue light emitting diode and is used for providing driving current for the red light emitting diode, the green light emitting diode and the blue light emitting diode. The row selection module is connected with row selection ends of the LED display units respectively through a plurality of row selection lines and is used for sequentially gating the LED display units in a preset scanning period.

Inventors

WANG HUI
ZHONG SHENG
WANG JIANG

Assignees

深圳市标杆节能科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260410

Claims (9)

1. The display driving circuit is characterized by being connected with a display module and used for driving the display module, wherein the display module comprises a plurality of LED display units, and the circuit comprises a first power supply module, a second power supply module, a driving module and a row selection module; The first power supply module is connected to the anode of the red light emitting diode in the LED display unit and is used for providing a first working voltage for the red light emitting diode; The second power supply module is respectively connected with the anode of the green light emitting diode and the anode of the blue light emitting diode in the LED display unit and is used for providing a second working voltage for the green light emitting diode and the blue light emitting diode, and the first working voltage is smaller than the second working voltage; the driving module is respectively connected with the cathodes of the red light emitting diode, the green light emitting diode and the blue light emitting diode and is used for providing driving current for the red light emitting diode, the green light emitting diode and the blue light emitting diode; the row selection module is respectively connected with row selection ends of the LED display units through a plurality of row selection lines and is used for sequentially gating the LED display units in a preset scanning period.
2. The circuit of claim 1, wherein the driving module comprises a first driving chip, a second driving chip, and a third driving chip; the first output end of the first driving chip is connected with the cathode of the red light emitting diode to the eighth output end of the first driving chip, and the first output end of the first driving chip is used for providing driving current for the red light emitting diode; The first output end of the second driving chip is connected with the cathode of the green light emitting diode to the eighth output end of the second driving chip, and the eighth output end of the second driving chip is used for providing driving current for the green light emitting diode; The first output end of the third driving chip to the eighth output end of the third driving chip are connected with the cathode of the blue light emitting diode and are used for providing driving current for the blue light emitting diode.
3. The circuit of claim 1, wherein the circuit further comprises a control module; the control module is connected with the driving module and is used for providing serial data signals and clock signals for the driving module; The driving module is further configured to latch data to be displayed according to the serial data signal and the clock signal.
4. The circuit of claim 3, wherein the control module is further configured to transmit a latch signal to the drive module; the driving module is further configured to control on/off states of the red light emitting diode, the green light emitting diode, and the blue light emitting diode according to the latch signal and the data to be displayed.
5. The circuit of claim 4, wherein the control module is further configured to provide an output enable signal to the drive module; The driving module is further configured to control output time of the driving current provided to the red light emitting diode, the green light emitting diode, and the blue light emitting diode according to the output enable signal.
6. The circuit of claim 3, further comprising a communication module; the communication module is connected with the control module and is used for communicating with external terminal equipment and receiving display data from the external terminal equipment; the communication module is also used for transmitting the display data to the control module.
7. The circuit of claim 1, further comprising an over-current protection module; The overcurrent protection module is connected to the output ends of the first power supply module and the second power supply module and is used for cutting off the output of the first power supply module and the second power supply module when the output current is detected to exceed the preset threshold value.
8. The circuit of claim 3, further comprising a delay module; The delay module is connected between the control module and the driving module and is used for carrying out delay processing on the clock signal and sending the delayed clock signal to the driving module.
9. A display screen energy saving device characterized in that it comprises the display driving circuit according to any one of claims 1 to 8.

Description

Display driving circuit and display screen energy-saving equipment Technical Field The application relates to the technical field of display equipment, in particular to a display driving circuit and energy-saving equipment for a display screen. Background The LED display screen is widely applied to the fields of advertisement media, performance stages, information release and the like, and is formed by splicing a plurality of LED display units. Each unit contains a plurality of light emitting chips with three colors of red, green and blue, and the light emitting chips are controlled to be on or off by the driving integrated circuit so as to realize full-color display. The traditional LED display module is powered by uniformly providing 5V direct current voltage for LEDs of all colors, and the driving integrated circuit adopts a structure of firstly connecting in parallel and then connecting in series and adopts a common positive driving mode. The optimal working voltages of the LEDs with different colors are obviously different, for example, a 5V power supply mode is generally and uniformly adopted in a traditional LED display screen, so that a red light chip can be in an overvoltage working state for a long time, unnecessary power consumption and heat are generated, and the overall energy efficiency of a display module is reduced. Therefore, how to reduce the power consumption of the LED display module is a problem to be solved. Disclosure of Invention The application mainly aims to provide a display driving circuit and display screen energy-saving equipment, and aims to solve the technical problem of how to reduce the energy consumption of an LED display module. In order to achieve the above purpose, the application provides a display driving circuit, which is connected with a display module and is used for driving the display module, wherein the display module comprises a plurality of LED display units, and the circuit comprises a first power supply module, a second power supply module, a driving module and a row selection module; The first power supply module is connected to the anode of the red light emitting diode in the LED display unit and is used for providing a first working voltage for the red light emitting diode; The second power supply module is respectively connected with the anode of the green light emitting diode and the anode of the blue light emitting diode in the LED display unit and is used for providing a second working voltage for the green light emitting diode and the blue light emitting diode, and the first working voltage is smaller than the second working voltage; the driving module is respectively connected with the cathodes of the red light emitting diode, the green light emitting diode and the blue light emitting diode and is used for providing driving current for the red light emitting diode, the green light emitting diode and the blue light emitting diode; the row selection module is respectively connected with row selection ends of the LED display units through a plurality of row selection lines and is used for sequentially gating the LED display units in a preset scanning period. In one embodiment, the driving module comprises a first driving chip, a second driving chip and a third driving chip; the first output end of the first driving chip is connected with the cathode of the red light emitting diode to the eighth output end of the first driving chip, and the first output end of the first driving chip is used for providing driving current for the red light emitting diode; The first output end of the second driving chip is connected with the cathode of the green light emitting diode to the eighth output end of the second driving chip, and the eighth output end of the second driving chip is used for providing driving current for the green light emitting diode; The first output end of the third driving chip to the eighth output end of the third driving chip are connected with the cathode of the blue light emitting diode and are used for providing driving current for the blue light emitting diode. In one embodiment, the circuit further comprises a control module; the control module is connected with the driving module and is used for providing serial data signals and clock signals for the driving module; The driving module is further configured to latch data to be displayed according to the serial data signal and the clock signal. In an embodiment, the control module is further configured to transmit a latch signal to the driving module; the driving module is further configured to control on/off states of the red light emitting diode, the green light emitting diode, and the blue light emitting diode according to the latch signal and the data to be displayed. In an embodiment, the control module is further configured to provide an output enable signal to the driving module; The driving module is further configured to control output time of the driving current provided to the r