CN1997101A

CN1997101A - Multifunctional indicator light and its application in the color TV

Info

Publication number: CN1997101A
Application number: CNA2006101565404A
Authority: CN
Inventors: 戴俊
Original assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Current assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Priority date: 2005-12-20
Filing date: 2006-12-20
Publication date: 2007-07-11

Abstract

This invention relates to one multi-function indication lamp and its application in color TV, which is characterized by the following: adopting anode multi-color lamp with one light tube HL2 cathode end connected to the control tube VH1 collection electrode in the wait and switch circuit and automatic switch electricity network integral filter type device relay VKA electrode, wherein, the other color light tube HL3 cathode branch is connected to the switch circuit of 50/60HZ filter type with control tube VPN collection electrode.

Description

Multifunctional indicator light and the application in colour TV thereof

Technical field

The present invention relates to the electronic product panel leds and use, particularly use in the color TV sets.

Background technology

Prior art, colour TV indicator light be often: remote-controlled start-up/shutdown be an indicator light permanent bright or adopt one bright when standby, work is extinguished, this need increase control circuit in addition.Perhaps adopt the double-colored written instructions lamp of common cathode, but need add two triodes and relevant control circuit thereof in addition.And existing colour TV video has all adopted multi-modulation scheme, and the colour TV screen shows only display color and sound accompaniment standard, is that 50HZ or 60HZ do not show to the scanning standard.This is difficult to distinguish the scanning standard is that the 60HZ colour is that PAL and scanning standard are that the 50HZ colour is a TSC-system formula program, if set up the energy-conservation blank screen noise elimination of no signal again, (that is: screensaver functions) or independent auditory function, originally should there be grating to occur, preferably there is indicator light to occur, is with differentiation holding state or blank screen noise elimination? but prior art is because of being subjected to shell restriction and cost factor, be difficult to increase again other functional indicator light, being used for distinguishing is holding state or blank screen noise elimination function, prior art so-called " screen protection " function, all be with the still luminous pattern that is added with of picture tube now, big power consumption is not only arranged, and screen protection state high pressure rising easily causing spark phenomenon.Thisly send image with display screen to replace light emitting diode lamp be pernicious.Can by after the existing control circuit combination in the performance prior art again dual-purpose realize a multi-functional indication of indicator light as the multifunctional indicator light control circuit?

Summary of the invention

For realizing the invention described above purpose, provide a kind of multifunctional indicator light and the application in colour TV thereof.

Multifunctional indicator light of the present invention and the application in colour TV thereof, employing is total to anode three ends or four end lead-out wires all can, wherein a kind of red color (or other colors) light-emitting diode HL2 negative terminal, by series resistor R671, behind the lead J1, after being connected in series diode J960 and diode J671 more respectively, be connected to control valve VH1 collector electrode JW12 and automatic switchover electrical network rectifying and wave-filtering mode device repeat circuit pipe VKA collector electrode in execution operate as normal/holding state commutation circuit again, reaching no-raster (blank screen) red light HL2 bright is holding state indication usefulness, and having grating red light HL2 bright is that the under-voltage power supply indication of AC network is used.

In order to realize the energy-conservation noise elimination of the automatic no-raster of no signal (blank screen), there is signal can force no-raster (listen separately) function and signal automatic switchover 50HZ arranged or the indication of 60HZ scan mode state, can shared another color indicator light HL3.For this reason, the another kind of color LEDs HL3 of this bi-colour LED negative terminal is by series resistor R671G, and lead J2 is connected in relevant controlling pipe VPN collector electrode in the 50/60 scan mode commutation circuit.Because control valve VPN base loop and another control valve VPE base loop all are connected in the three-state instruction of the ternary command end of micro-control pipe CPU (50/60/PE) jointly.So-called high/medium/low tristate logic level command end refers to CPU output high level " 1 ", intermediate level " 0.5 " (be high level " 1 " numerical value half), low level " 0 ".So can realize no signal automatic energy saving blank screen noise elimination or have signal to force sound no-raster, HL3 is bright for green indicator light (or other color indicator lights).Signal (comprising when screen shows character and occurs) is arranged, if scan mode is 50HZ when signal is arranged, then green indicator light HL3 extinguishes, if when scan mode is the 60HZ standard when signal is arranged then green light is bright.Both sides' indicator light of the present invention can also increase under the double-colored all bright state again, is combined with/the no-raster phenomenon.Can be used as other function indication usefulness, can constitute 6 kinds of function indications of a double color luminotron.Only use wherein 4 kinds of functions indications in the accompanying drawing example of the present invention.These 4 kinds of function indications specially do not increase circuit cost.Particularly increase bright this indication of blank screen noise elimination green light.Overcoming prior art needs energy-conservation this blank screen of screen protection, but can't blank screen phenomenon shortcoming.

Description of drawings

Figure of description has 1 page of 2 width of cloth.Accompanying drawing derives from the pairing schematic diagram of the true concrete printed circuit board (pcb) of realization colour TV machine product.Figure of description, the specific embodiment of the indispensable essential characteristics that detailed especially the present invention is correlated with.Φ represents variable or removable end.(particularly element and the item thereof) that specification and accompanying drawing are not explained explained by the legal or current example of passing through.[circuit element, parameter and item thereof are only represented the relevant attribute BOM with element of accompanying drawing item parameter among this machine product schematic diagram mapping nature printing circuit board PCB, and not all at this specification and mark, only supply preferred embodiment of the present invention specific product with reference to].(circuit) the plate common port of the cold end that does not involve mutually with electrical network " " Jianization Shang mark.In the different accompanying drawings, contain same tag, have same target, refer to that function or performance effect are identical.Vcc can refer to arbitrary power supply hot end, sometimes in order to distinguish different Vcc, as: use 5V-1,5V-3,5V-4 waits different power supply marks, can be the different electrical power voltage value, and except that Vcc, same reference numerals person can be connected in the same accompanying drawing.[Fig. 1 example]: be key technology figure of the present invention; [Fig. 2 example]: be the product specific embodiment.Each figure effect sees hereinafter explanation for details:

Embodiment

Describe realization best way of the present invention in detail below in conjunction with the accompanying drawing example.Preamble has been stated or has no longer been repeated in conjunction with continue to use prior art or in like manner should change etc.

[Fig. 1 or Fig. 2 example]: employing is total to anode three ends or four end lead-out wires all can, wherein a kind of red color (or other colors) light-emitting diode HL2 negative terminal, by series resistor R671, behind the lead J1, after being connected in series diode J960 and diode J671 more respectively, be connected to control valve VH1 collector electrode JW12 and automatic switchover electrical network rectifying and wave-filtering mode device repeat circuit pipe VKA collector electrode in execution operate as normal/holding state commutation circuit again, micro controller cpu instruction end PR ON/OFF=" 0/1 ", during electronegative potential " 0 " start, control valve VH1 is a cut-off state, during high potential " 1 " standby, control valve VH1 is the saturation conduction state, be the 0V current potential over the ground by the drop-down red led HL2 of diode J960 negative electrode, it is bright to reach no-raster (blank screen) red led HL2, special-purpose as the holding state indication; When electrical network is under-voltage (as: during 140～V), cut-off state when voltage-stabiliser tube D7 could conducting during by normal power supply transfers under-voltage power supply to, make multiple tube V5 and VKA under the effect of positive feedback branch R7 branch road during the reason normal power supply when transferring under-voltage power supply to the saturation conduction state, be in 0 current potential over the ground, bright by the drop-down indicator light HL2 that makes of diode J671, can realize that grating red light HL2 is bright, under-voltage power supply indication is used as AC network.

[Fig. 2 example]: by soft start formula row vibration HOSC power supply source (9), work/standby commutation circuit (5B), (4), automatic switchover AC network straightening and filtering unit formations such as (7), photoelectrical coupler N2C output branch road JW connects Switching Power Supply and surely controls loop.

The another kind of color LEDs HL3 of this bi-colour LED negative terminal is by series resistor R671G, and lead J2 is connected in relevant controlling pipe VPN collector electrode in the 50/60 scan mode commutation circuit; This control valve VPN base stage, by on draw biasing resistor RE45C to be connected in power supply (5V-3) positive pole.Because control valve VPN base loop and another are listened control valve VPE base loop separately, respectively by diode DE56 and diode (or: voltage-stabiliser tube) DPE is connected in command end of micro controller CPU jointly, if during this command end output electronegative potential 0V, control valve VPN is ended, otherwise, control valve VPN is in the saturation conduction state, by the drop-down indicator light HL3 of resistance R 671G branch road negative electrode, makes indicator light HL3 bright.For this reason: switching indication of 50HZ/60HZ scanning standard and the energy-conservation blank screen noise elimination of no signal among the micro controller CPU of the present invention/there is signal to force unglazed (that is: listening separately), can share binary states (a 0/1) command end or three-state (0V0.5/1) instruction output end (50/60/PE).This command end (50/60/PE), when being electronegative potential 0V in the time of can having realized signal or have character screen to show, control valve VPN and indicator light HL3 end, no signal or signal is arranged is 60HZ scanning standard, then indicator light HL3 is bright.The energy-conservation blank screen noise elimination of no signal/have signal to force unglazed (that is: standard is listened separately), this command end is high potential (1), can turn-off field scan and decoder, need not the circuit of power consumption by beam current of kinescope etc. the main stabilized voltage power supply voltage stabilizing value that reduces former operate as normal makes complete machine be in energy-conservation noise-limited condition to needing state.(its outstanding advantage: be half of prior art quiescent dissipation, and eliminate the prior art blank screen high pressure easily sparking fault shortcoming that rises).Owing to adopt automatic scan standard 50/60HZ to switch, and if when determining to have signal to be 60HZ scanning standard indicator light HL3 bright, be that 50HZ scanning standard has grating indicator light HL3 not work.So convenient remind the user to run into signal is arranged but manual combined tuning system standard when not having sound or not having colour.If above-mentioned command end (50/60/PE) is binary states level (0/1), then diode DE56 should be light, and resistance R E54E removes, and voltage-stabiliser tube DPE changes diode into.

(all item and the parameters of accompanying drawing can be changed in this specification, and this specification multi-colour LED refers to that an indicator light contains two kinds of colors (HL2 and HL3) or two kinds of indicator lights that color is above, and described HL2 and HL3 can be other any colors).

The present invention program can be separately or its application that combines.And can directly be common to all field of electronics.Especially TV tech (comprising any Display Technique product) is more suitable for.

Claims

1. multifunctional indicator light and the application in colour TV thereof, it is characterized in that: adopt anode three ends or four end lead-out wires altogether, wherein a kind of red color or other color LEDs (HL2) negative terminal are by series resistor (R671), lead (J1) back, be connected in series diode (J960) and diode (J671) respectively again and be connected to control valve (VH1) collector electrode (JW12) and automatic switchover electrical network rectifying and wave-filtering mode device (7) repeat circuit pipe (VKA) collector electrode in execution operate as normal/holding state commutation circuit afterwards, again; Can realize that holding state no-raster blank screen indicator light HL2 is bright, having grating indicator light HL2 bright is that the under-voltage power supply indication of AC network is used.

2. according to described multifunctional indicator light of claim 1 and the application in colour TV thereof, it is characterized in that: another kind of green color or other color LEDs (HL3) negative terminal, by series resistor (R671G), lead (J2) is connected in the 50/60 scan mode commutation circuit, relevant controlling pipe (VPN) collector electrode; This control valve (VPN) base stage, by on draw biasing resistor (RE45C) to be connected in power supply (5V-3) positive pole; Indicator light (HL3) extinguishes in the time of can having realized the 50HZ scan mode signal or have the character screen to show; The energy-conservation blank screen noise elimination of no signal/have signal to force unglazed grating (that is: listening separately), or 60HZ scanning standard signal is arranged, then indicator light (HL3) is bright.

3. according to described multifunctional indicator light of claim 1 and the application in colour TV thereof, it is characterized in that: micro controller cpu instruction end PR adopts ON/OFF=" 0/1 " instruction, during electronegative potential " 0 " start, control valve (VH1) is a cut-off state, and during high potential " 1 " standby, control valve (VH1) is the saturation conduction state, be the 0V current potential over the ground, by the drop-down red indicator light of diode (J960) (HL2) negative electrode, it is bright to reach no-raster (blank screen) red light (HL2), special-purpose as the holding state indication; When electrical network is under-voltage, cut-off state when voltage-stabiliser tube (D7) could conducting state during by normal power supply transfers under-voltage power supply to, make multiple tube (V5) and (VKA) saturation conduction state when cut-off state transfers under-voltage power supply to during the reason normal power supply under the effect of positive feedback branch (R7) branch road, be 0 current potential over the ground, bright by the drop-down indicator light (HL2) that makes of diode (J671), can realize that grating red light (HL2) is bright, under-voltage power supply indication is used as AC network.

4. according to described multifunctional indicator light of claim 2 and the application in colour TV thereof, it is characterized in that: control valve (VPN) base loop and another are listened control valve VPE base loop separately, respectively by diode (DE56) and diode or: voltage-stabiliser tube (DPE) all is connected in command end of micro controller (CPU) jointly, during this micro controller (CPU) command end output electronegative potential 0V, control valve (VPN) and indicator light (HL3) are ended, otherwise, control valve (VPN) is in the saturation conduction state, directly, make indicator light (HL3) bright by resistance (R671G) branch road; Among this micro controller CPU, adopt binary states (a 0/1) command end or three-state (0/0.5/1) instruction output end (50/60/PE); This command end (50/60/PE) when being electronegative potential 0V in the time of can having realized the 50HZ scan mode signal or have character screen to show, ends control valve (VPN) and indicator light (HL3) thereof, no signal or signal is arranged is 60HZ scanning standard, and then indicator light (HL3) is bright; The energy-conservation blank screen noise elimination of no signal/have the signal pressure unglazed, this command end is a high potential 1, can turn-off field scan and decoder, need not the circuit of power consumption by beam current of kinescope etc., the main stabilized voltage power supply voltage stabilizing value that reduces former operate as normal makes complete machine be in energy-conservation noise-limited condition to needing state.