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CN-121982988-A - Power consumption management method for LED movie screen

CN121982988ACN 121982988 ACN121982988 ACN 121982988ACN-121982988-A

Abstract

The invention provides a power consumption management method of an LED movie screen, which comprises the steps of adopting a switching power supply with a control end EN by using double direct current outputs for all LED display screen bodies of the LED movie screen, wherein the switching power supply is provided with two paths of direct current outputs DCA and DCB, the DCA is supplied to an LED display module and controlled by EN, the DCB is only supplied to a receiving card of the LED display screen body and is always and effectively powered without being controlled by EN, other outputs of the LED display screen bodies are controlled by the control end EN, and the control end EN controls the DCA to be powered off or restored when receiving a standby or awakening instruction. The power consumption management method for the LED movie screen reduces the power consumption of the black screen and saves energy. The device is different from direct shutdown in that the device can quickly enter a black screen energy-saving state and can quickly recover, and can be controlled automatically or by manual instructions.

Inventors

  • YANG JIE
  • HUANG YICHEN
  • ZHANG PENGHAO
  • LIU HENIAN
  • Bian Yinlong

Assignees

  • 中影光峰激光影院技术（北京）有限公司

Dates

Publication Date
20260505
Application Date
20260311

Claims (8)

  1. 1. A power consumption management method for an LED movie screen is characterized in that all LED display screen bodies of the LED movie screen are provided with a switching power supply with double direct current outputs and a control end EN, the switching power supply is provided with two paths of direct current outputs DCA and DCB, the DCA is supplied to an LED display module and controlled by EN, the DCB is only supplied to a receiving card of the LED display screen body and is always and effectively powered and is not controlled by EN, other outputs of the LED display screen bodies are controlled by the control end EN, and the control end EN controls the DCA to be powered off or restored when receiving a standby or awakening instruction.
  2. 2. The method of claim 1, wherein the IMB is further provided with two device instructions, namely a standby instruction and a wake-up instruction, wherein the instructions adopt TCP/IP packets and conform to a communication protocol with the LED movie screen.
  3. 3. The method of claim 2, wherein the sending card responds to the standby and wake-up commands sent by the IMB and distributes the commands to all receiving cards in the LED display screen body through the internal communication pipeline.
  4. 4. The method for managing power consumption of the LED movie screen according to claim 2, wherein the LED display box of the LED movie screen is characterized in that after receiving a standby instruction, a control signal is set to be low level to control a switching power supply to turn off DCA output, and after receiving a wake-up instruction distributed by a sending card, the control signal is set to be high level to control the switching power supply to turn on DCA output.
  5. 5. The LED cinema screen power consumption management method according to claim 1, wherein the standby processing comprises the steps of: s1, judging an LED movie screen currently in an empty field or between fields by TMS according to the movie scheduling and ticket collecting system data; s2, sending a signal to a knapsack box of the LED movie screen by the TMS through the Ethernet, and controlling the IMB to send a standby equipment instruction; S3, after the sending card receives the 'standby' equipment instruction of the IMB, the sending card distributes the 'standby' equipment instruction to receiving cards of all LED display screen bodies needing standby through communication pipelines inside the LED movie screen; And S4, the receiving card controls the switching power supply to turn off the DC power DCA output to the LED display module through the control signal EN, so that standby is realized.
  6. 6. The LED cinema screen power consumption management method according to claim 1, wherein the recovery process comprises the steps of: s11, judging an LED movie screen needing to be restored to play according to the movie scheduling and ticket collecting system data by the TMS; S12, sending a signal to a knapsack box of the LED movie screen by TMS through an Ethernet, and controlling the IMB to send a 'restore' device instruction; s3, after the sending card receives an IMB ' resume ' device instruction, the IMB ' resume device instruction is distributed to all receiving cards of the LED display screen body needing to be restored through the communication pipeline inside the LED movie screen; and S4, the receiving card controls the switching power supply to start the DC power DCA output to the LED display module through the control signal EN, so that recovery is realized.
  7. 7. The method for managing power consumption of an LED movie screen according to claim 1, wherein the DCA output power is 100-300W, and the DCB output power is 5-15W.
  8. 8. The power consumption management device of the LED movie screen is characterized in that the LED movie screen comprises an LED display screen body and a knapsack box, wherein the LED display screen body comprises a plurality of unit boxes, each unit box comprises an LED display module, a switch power supply and a HUB board carrying an LED receiving card; All unit boxes of the LED display screen body adopt a switching power supply with double direct current outputs and a control end EN, the switching power supply is provided with two paths of direct current outputs DCA and DCB, the DCA is supplied to the LED display module and controlled by EN, the DCB is only supplied to a receiving card of the LED display screen body and is always and effectively powered, and is not controlled by EN, and when the control end EN receives a standby or awakening instruction, the DCA is controlled to be powered off or restored.

Description

Power consumption management method for LED movie screen Technical Field The invention relates to an LED movie screen, in particular to a power consumption management method of the LED movie screen. Background At present, an LED movie screen (LED Wall) is taken as an innovation direction of cinema display technology, an LED self-luminous technology is taken as a core at present, the traditional projection curtain is gradually replaced, and breakthrough development is realized in the aspects of brightness, sound transmission performance and the like. The current LED movie screen market takes home-made brands as a leading part, and ‌ CINITY, ‌ Liider and other brands realize international authentication breakthrough through technical innovation, and the core advantage of the LED movie screen market is represented by high-precision tip configuration such as 4K/120 frame high-format projection, full sound transmission technology and the like. The LED movie screen is technically characterized in that (1) ‌ image quality revolution ‌ has a ‌ and 3840Hz ultra-high refresh rate to eliminate smear, the brightness reaches 300nit (3 times of the traditional projection), the ‌ HDR technology realizes 1000000:1 contrast and supports 98% ‌ DCI-P3 color gamut coverage. ‌ ‌ (2) ‌ acoustically breaks through ‌, such as ‌ Nanjinopu first create ‌ m 4K full sound transmission screen, the penetration rate reaches 25%, and the sound and picture synchronization error is less than 5ms. ‌ CINITY LED adopts a customized audio algorithm to realize the innovation of sound image positioning accuracy + -0.5 degrees (3) ‌ projection, support ‌ on-lamp projection (the ambient light tolerance reaches 500 lux), and break the limitation of the dark environment of the traditional cinema. The ‌ ‌ ‌ modular design realizes 8-hour quick installation, and the maintenance cost is reduced by 60%. As shown in fig. 1, the LED movie screen generally comprises an LED display screen body and a backpack box, wherein the main power consumption part is in the screen body part, the screen body is composed of tens to hundreds of unit boxes, each box is composed of a plurality of LED display modules, a switching power supply and a HUB board (integrated interface board) carrying an LED receiving card, and the main power consumption part is the LED display module. The backpack box is internally provided with a movie server IMB (integrated media module) and a sending card of the LED controller, and is used for receiving TMS (cinema management system) data. ‌ ‌ A The main devices of the LED display module are LED lamp beads and a driving IC, and the power consumption of the LED display module can be divided into two cases: (1) The average power consumption during normal projection is extremely relevant to the content because the LED movie screen is actively lighted, and the average power consumption is about 30% of the white field brightness power consumption and varies with the brightness of the projected content. (2) And the power consumption of the black screen is about 2-3w of each LED module, and the power consumption is fixed, so long as the LED display module is in an electrified state, the power consumption exists and is irrelevant to the projection content. Such power consumption is effectively ineffective power consumption. According to the situation, in the period of no projection, the power supply to all the LED display modules can be completely turned off independently, so that the black screen power consumption is eliminated, and the purpose of energy conservation is achieved. Disclosure of Invention The invention provides a power consumption management method of an LED movie screen, which solves the power consumption problem of a drive IC (integrated circuit) for closing an LED display module in the LED movie screen in a non-projection period, and the technical scheme is as follows: A power consumption management method of an LED movie screen comprises the steps of adopting a switching power supply with a control end EN and double direct current outputs for all LED display screen bodies of the LED movie screen, wherein the switching power supply is provided with two paths of direct current outputs DCA and DCB, the DCA is supplied to an LED display module and controlled by EN, the DCB is only supplied to a receiving card of the LED display screen body and is always and effectively supplied with power and is not controlled by EN, other outputs of the LED display screen body are controlled by the control end EN, and the control end EN controls the DCA to be powered off or restored when receiving a standby or awakening instruction. The IMB is added with two device instructions of standby and wake-up, and the instructions adopt TCP/IP packets, so that the instructions conform to a communication protocol with the LED movie screen. In the knapsack box of the LED movie screen, the sending card responds to standby and awakening instructions sent by the IMB