TWI273384B - Power drive circuit of a display screen - Google Patents

Abstract

The present invention discloses a power drive circuit of a display screen, which utilizes a power controller to supply permanent power by a permanent power supply system electrically connected to an alternating current source. When receiving an external on/off signal, the present invention outputs a drive signal to turn on/off a low voltage power switch system and a high voltage power switch system for determining to output a low voltage and high voltage power to drive the display screen. Therefore, the environmental protection requirement of optimizing power saving can be achieved by merely operating the permanent power supply system when the display screen is off.

Description

1273384 IX. Description of the invention: [Technical field to which the invention pertains] A invention relates to a power supply driving circuit for a display screen, in particular to an electrical noise circuit for providing display power, in which only resident power is retained in a display off state Resident power to power control _, the remaining low-voltage power transfer (10) system and high-voltage power conversion system is in the off state to achieve the best power saving environmental protection I 〇 ', [previous technology] eve display screen power drive mode is to The AC power source input t, the parent = force is converted by the AC-DC power supply (the existing specifications are divided into 5V, 12V, 24V, tearing, etc., and the output gauge L = the DC power is provided to the display respectively, ' The low-voltage load includes the display panel, the speaker and other equipment, and the low-voltage DC power is the other two. The high-voltage power conversion system uses the low-voltage straight-electric power-up lamp (such as the cold cathode lamp). The screen negative _ is equipped with gas, but in the concept of environmental protection, the power factor of the power drive (Power iact〇r) or = ten electrical production, and low-voltage power ❹jcheng private power saves efficiency and low power consumption requirements, however, because the positive device is achieved* is the large size demand of LCD TVs, the size of the slanting ancient two ^ clothing size is increasing, especially increasing, and there is high power The conversion system, the required driving power, and the low-home DC power of the system, so the LCD TV must be designed to have a larger power wheel or a battery connection with the AC power source. Low reached 'this move makes the normal state of the state more, still has - fixed power and electricity system for the display screen to shut down the standby force so she will not be able to meet the strict power loop = 5 1273384 gauge utr sigh silk demand). The system is separated from the starting point, and the system is still connected to the AC power system. The power supply controller is connected to the AC power system in the standby state. The BfU tiger starts or shuts down the low-voltage power k, and then outputs the drive-wheel low-voltage and high-voltage power conversion system to determine the environmental protection requirements of the best power saving. The description of the configuration is as follows: Figure, as shown in the figure, is too aaJ. The circuit block of the first embodiment of the present invention is shown, 1_奂 power drive, the current source 1G normally maintains electrical connection to the power supply The controller 50 is powered by the electricity::: the resident power 71 of the screen is closed - the driving signal 51 is 5; the power control gain 50 receives an external opening and closing signal connection, the low % pressure charging, 3: '= the communication The power source 10 normally maintains the electrical property to determine the round-trip low-voltage conversion. The drive signal 51 is turned on or off to -gu rf: purely dynamic low-voltage load 61; connection, money, system _ AC power source 1G f state maintains electrical properties It is decided to rotate the ^. No. 52 to start or turn off the high voltage load 62 with the beam power. The high-voltage power system 20, the low-voltage power conversion system 30, and the current system iQ are electrically connected to the alternating current power source w. The second embodiment and the first embodiment shown in FIG. The first difference is shown in the first 1273384 embodiment in which the resident power system 2G is shared with the low-voltage power conversion system - a rectifier 31 electrically connected to the alternating current power source 10, and the high-voltage power conversion system 4 The present invention has a rectification n 41, but the real type has been known to the manufacturer, the following is the first to the actual, and the second embodiment is not described. The present invention uses a liquid crystal television display as an example to illustrate the resident Between the power system 2 and the AC power source 1G, there is a turn-off 22, which is generally designed to be below the front end panel of the crystal TV display, when the open/close switch 22 is open 9, The power of the output of the parental power source 10 output will be converted to DC power by the rectifier π power secret 2G to the power controller port α ' /,, 'The power controller, 50 series can be one The switch opening and closing circuit or for a micro control is 'and the power controller 50 It can be built in the resident power system 20 towel, or the video processing circuit board built in the low voltage load 61 of Xiankeshi, or separately: this day, when the user wants to start the LCD TV display, then one The remote control i pH out 7 ^ wireless external opening and closing signal 71 'receives the external output in the power controller 50 - the driving signal 5 52 starts the power conversion system 4, the system, the system 40, and the low voltage power conversion system 30 The parental power of the convertible AC 22 is low-voltage DC power (there are 5V for different specifications, and the flow power == Qiu Yu's specifications depend on the production of the family). The low-voltage load 61 that is not screened is used to use the 'low-voltage load 61 ancient illuminating drive panel, video processing circuit board, ° and other equipment, and the line change 4G _ the AC power source ig input AC power has been boosted After the high-voltage power is driven to drive the high-voltage load 62 of the display screen, the t-loader 62 is a display moonlight module with a gas discharge lamp (such as a cold cathode lamp). *, , , , ', open and away from the actual In the description, the LCD TV of the present invention If the screen is turned off and the external open/close signal 71 of the control 70 output is the off signal, the power supply-50 will turn off the low-voltage power conversion system 3〇 and the high-voltage power conversion system, $ d 1273384. When the pen display screen is in the standby state, the system will be able to effectively achieve low power consumption. (4) 曰 = The above description is only a preferred embodiment of the present invention, and is not intended to limit the practice of this month. range. That is, the content of the patent application scope of the present invention is 'chemicalized and modified, and the county has the technical record 4 of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit block diagram of a first embodiment of the present invention. FIG. 2 is a block diagram of a circuit according to a second embodiment of the present invention. .......... AC power source 20............. resident power system 22.............open switch 30.. .........••Low-voltage power conversion system

40.............High-voltage power conversion system 50.............Power controller 51, 52...........Driver Signal 61 .............low voltage load 62 .............high voltage load 70 · · · .......... remote control 71.............External opening and closing signal 21, 3 Bu 41......Rectifier

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Claims (1)

f. Apply for the patent Fan Park ··,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, Two =:, provide a resident power I for the display to start or turn off. Drive ΐΪΓ 'The power controller receives an external opening and closing signal and turns out one connection, the flow of power to avoid electrical connection, the conversion secret, no The normal power transfer of the AC power source is far from the ancient 4 view of the age of the turn of the fire to determine the turn-off - the high voltage load of the converted electric drive display.疋 2 · · · · · · · · · 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第 第The screen opening/closing signal is a wireless signal sent by a remote controller. u Haiwai 4. The power supply circuit of the display screen according to item 1 of Shenli Fan, the source controller is a switch opening and closing circuit. /, μ power 5 · The source controller is the - microcontroller as described in the scope of the patent application. Kaichun Road, where the electricity 6·such as Shen 4 special success list 1 reward Wei Ke stationed in the power system, the low-voltage power conversion "w = moving Hong Road, the middle and the exchange of power paste system system 7 The display screen of the invention, wherein the resident power line and the low-voltage power converter (10) belong to a rectifier connected by a sexual connection and the high-voltage power conversion system is two (two)