Background technology
TV is the signal with TV station's conveying, by the channel selection demodulation video-audio signal that the user selects, is separated into video-audio signal and relevant video-audio signal is handled the audio and video equipment of back by picture, the broadcast of raising one's voice.
In this TV, be in order to pursue high definition/large-screen as CRT of extensive use etc., and adopted LCD, the TV of PDP.
Especially, adopt the TV of PDP, compare with original C RT on its structure, have ultra-thin property, compare with LCD, thereby have the technology important document that stronger bendability satisfies TV, and the characteristic that can be arranged on the wall is arranged,, sell well as novel TV.
But, during the starting of PDP TV, need high voltage, so the control of relevant power supply architecture becomes a technology important document of PDP TV universalness.
The general structure of PDP is so: PDP is lumped together by upper plate and lower plate and forms.Upper plate is by the scan electrode of mutual balance and keep electrode; And comprise scan electrode and keep the conductive layer that is positioned at upper plate of electrode and diaphragm is formed.
Lower plate is by address electrode; Comprise address electrode and form the electric conductor film of substrate front; On the electric conductor film between the address electrode, form dividing plate; The fluorophor that forms on the dividing plate of each discharge battery inside and the electric conductor film surface is formed.
Commingle discharging gas in upper plate and the lower plate interval plays the effect of discharge, mixes in the anti-electric body and contains inert gases such as He, xe.
Above-mentioned PDP be along with above-mentioned electrode reach decide voltage, above-mentioned discharge gas discharge, the ultraviolet radiation absorption fluorophor that takes place during by discharge manifests picture.So, for by the set stipulated time on the above-mentioned electrode, reach institute and decide voltage, need possess the module driver of controlling the PDP module drive.
In existing technology, the power control on the PDP TV as shown in Figure 1: before not developing from standby form and image, in order to reach the starting command requirement of user, to the standby power device 11 of associated components power supply by the remote controller input; Behind standby power device 11 startup power supplies, according to the microcomputer 12 of algorithmic language output control signal; After receiving the AC power commonly used of input, the power controller 15 of supplemental capacity; The relay 14 of approval electric current is carried in control to power controller 15; According to the control signal of microprocessor 12, the relay drive 13 that control relay 14 drives; After the output voltage transformation with power controller 15, drive the VS power delivery device 16 of keeping electrode; After the output voltage transformation with power controller 15, drive the VA power delivery device 17 of address electrode; After the output voltage transformation with power controller 15, carry the Vsetup power delivery device 18 of three voltages; After the output voltage transformation with power controller 15, the Vsc power delivery device 19 of driven sweep electrode; From VS power delivery device 16, VA power delivery device 17, Vsetup power delivery device 18, Vsc power delivery device 19 received currents and 20 groups of PDP modules that drives
Existing P DP TV power supply control device is made up of above structure, controls start mode by the power supply of prior art operation:
At first, with power supply opening, microprocessor 12 is discerned the order of opening that receives by after receiving ultraviolet signal to the user with remote controller, and by the algorithmic language program of having set, starting respectively drives key element.
Then, by both definite sequences, it is in order to prevent from because of excess load each inscape to be caused the generation of reliability such as loss that starting respectively drives key element.
Because above-mentioned reason, microprocessor 12 is carried control signal to relay drive 13, drive relay 14, after relay 14 drives, carry power supply to power controller 15, power controller is carried power supply to VS power delivery device 16, VA power delivery device 17, Vsetup power delivery device 18, Vsc power delivery device 19.
So the user turns on the power switch, after relay drive 13 sends control signal, to VS power delivery device 16, VA power delivery device 17, Vsetup power delivery device 18, Vsc power delivery device 19 output control signals.
So VS power delivery device 16, VA power delivery device 17, Vsetup power delivery device 18, Vsc power delivery device 19 to corresponding electrode, drive the power delivery that obtains PDP module 20, thereby the picture of the selected channel of user occurs.
According to above explanation, PDP TV power control device by the prior art manufacturing is to obtain power supply from VS power delivery device, VA power delivery device, Vsetup power delivery device, Vsc power delivery device, when electric current passes through VS power delivery device, because type of drive, the excessive excessive velocities that changes of current amplitude, thus film flicker caused when driving PDP.
Embodiment
Fig. 2 is a PDP power control front view of the present invention.
The PDP power control is as shown in Figure 2 according to the present invention: the standby module is a picture when not showing, for can corresponding user starting command requirement by the remote controller input, to standby power device 101 that must the component parts power supply; Control the microprocessor 102 of all systems and out-put supply control signal; After receiving the AC power commonly used of input, the power controller 105 of supplemental capacity; Behind the conveying voltage of received power controller 105, keep the Vs power delivery device 106 that electrode is kept voltage to PDP module 110 feed drive; After the output voltage transformation with power controller 105,, provide the Vsc power delivery device 107 of scanning voltage Vsc for driving PDP module (110) address electrode; After receiving the power supply of Vs power delivery device 106 outputs, carry the Vsetup power delivery device 108 of three voltages to PDP module 110; After receiving the power supply of Vs power delivery device 106 outputs,, provide the Va power delivery device 109 of address voltage Va for driving the scan electrode of PDP module; The relay 104 that the conveying power supply of power controller 105 is controlled; According to the control signal of microprocessor 102, the relay drive 103 that control relay 104 drives is formed, and wherein Vs is the 1st power delivery device, and Va the 2nd power delivery device, Vsetup are the 3rd power delivery device, and Vsc is the 4th power delivery device.
The working procedure of PDP TV power supply control device of the present invention that above-mentioned formation is described is as follows:
At first, the user uses the remote controller opening power, after the power supply that microprocessor 102 receives by ultraviolet collection of letters means " leaves " command recognition, this order is transported to relay drive 103.Relay drive 103 is opened relay 104.So, AC power commonly used is provided for power controller 105.
Afterwards, after power controller 105 replenishes the power of AC power, carry power supply to Vs power delivery device 106, Va power delivery device 109.
And then, the power supply from 106 outputs of Vs power delivery device provides to Vsc power delivery device 107 and Vsetup power delivery device 108.
Out-put supply with Vs power delivery device 106 is offered PDP module 110 after Vsetup power delivery device 108 and 107 decomposition of Vsc power delivery device earlier exactly.
Change from 0A to 1.5A from the electric current of Vs power delivery device 106 outputs, its amplitude of variation is very big, above-mentioned Vsetup power delivery device 108 and Vsc power delivery device 107 then play abirritation, thereby can reduce and transfer to the electric current amplitude of variation of keeping electrode on the PDP module 110.