CN112349249B - OLED driving power supply and OLED television - Google Patents
OLED driving power supply and OLED television Download PDFInfo
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- CN112349249B CN112349249B CN202011210774.9A CN202011210774A CN112349249B CN 112349249 B CN112349249 B CN 112349249B CN 202011210774 A CN202011210774 A CN 202011210774A CN 112349249 B CN112349249 B CN 112349249B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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Abstract
The invention discloses an OLED driving power supply and an OLED television, wherein the OLED driving power supply comprises: the OLED display screen comprises a main power supply, an on-screen power supply and a main board, wherein the on-screen power supply and the main board are electrically connected with the main power supply, the main board is used for outputting a switching signal and an OLED control signal, and the on-screen power supply is used for turning on or turning off the OLED screen according to the OLED control signal; the main power supply includes: a power supply circuit and a standby circuit; the first end of the standby circuit is electrically connected with the power supply circuit, the second end of the standby circuit is electrically connected with the mainboard, and the third end of the standby circuit is electrically connected with the on-screen power supply; the power supply circuit outputs a standby signal or a working signal to the mainboard according to the switching signal. The standby circuit receives the switch signal, and then outputs the standby signal or the working signal to the mainboard to control the standby or the working of the mainboard.
Description
Technical Field
The invention relates to the technical field of television power supplies, in particular to an OLED (organic light emitting diode) driving power supply and an OLED television.
Background
Since the oled (organic light emitting diode) does not need a backlight, does not need a color filter and a liquid crystal, and can emit light by itself, it is superior to the conventional LCD and LED in terms of image quality, response speed, thickness, and viewing angle, and thus is widely used.
At present, the power supply of the OLED television needs to meet the requirement of power supply output stability, and the OLED television is complex in circuit and high in cost.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide an OLED driving power supply and an OLED television, wherein a standby circuit outputs a standby signal or a working signal according to a switching signal, and a main board is controlled to work or stop through the standby circuit, so that the requirement of the OLED television on the output stability of the power supply is met.
In order to achieve the above object, the present invention provides an OLED driving power supply including:
the OLED display screen comprises a main power supply, an on-screen power supply and a main board, wherein the on-screen power supply and the main board are electrically connected with the main power supply, the main board is used for outputting a switching signal and an OLED control signal, and the on-screen power supply is used for turning on or turning off the OLED screen according to the OLED control signal;
the main power supply includes: a power supply circuit and a standby circuit; the first end of the standby circuit is electrically connected with the power supply circuit, the second end of the standby circuit is electrically connected with the mainboard, and the third end of the standby circuit is electrically connected with the on-screen power supply; and the power supply circuit outputs a standby signal or a working signal to the mainboard according to the switching signal.
In a further refinement, the standby circuit comprises:
a voltage reduction circuit and a switch circuit;
the first end of the voltage reduction circuit is electrically connected with the mainboard, the second end of the voltage reduction circuit is electrically connected with the power supply on the screen, and the third end of the voltage reduction circuit is electrically connected with the power supply circuit; the first end of the switch circuit is electrically connected with the mainboard, the second end of the switch circuit is electrically connected with the power supply on the screen, and the third end of the switch circuit is electrically connected with the power supply circuit.
In a further improvement, the voltage reduction circuit comprises a first switch unit, a sampling unit, a first optical coupler unit and an output unit;
the first end of the first switch unit is electrically connected with the mainboard, and the second end of the first switch unit is electrically connected with the first end of the sampling unit, the first end of the first optical coupler unit and the first end of the output unit;
the second end of the sampling unit is electrically connected with the second end of the first optical coupling unit;
the third end of the first optical coupling unit is connected with the on-screen power supply, and the fourth end and the fifth end of the first optical coupling unit are electrically connected with the power supply circuit.
In a further refinement, the first switching unit comprises: the circuit comprises a first diode, a first resistor, a second resistor, a first capacitor, a first triode, a third resistor and a fourth resistor;
the anode of the first diode is electrically connected with the mainboard, and the cathode of the first diode is electrically connected with one end of the first resistor; the other end of the first resistor is electrically connected with one end of the second resistor, one end of the first capacitor and a base electrode of the first triode; the other end of the second resistor, the other end of the second capacitor and the emitter of the first triode are all grounded; the collector of the first triode is electrically connected with one end of the third resistor; the other end of the third resistor is electrically connected with one end of the fourth resistor;
the first end of the first switch unit is the anode of the first diode, and the second end of the first switch unit is the other end of the fourth resistor.
In a further refinement, the sampling unit comprises: the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the three-terminal voltage regulator, the second capacitor and the third capacitor;
one end of the fifth resistor is electrically connected with one end of the sixth resistor, the second end of the first switching unit, the input end of the three-terminal regulator, one end of the second capacitor, the first end of the first optical coupler unit and the first end of the output unit;
the other end of the fifth resistor, the other end of the sixth resistor, the grounding end of the three-terminal voltage stabilizer and one end of the third capacitor are all grounded;
the output end of the three-terminal voltage stabilizer is electrically connected with the other end of the second capacitor and the second end of the first optical coupling unit;
a third capacitor is connected between the second end of the three-terminal regulator and the third end of the three-terminal regulator;
and the first end of the sampling unit is one end of the fifth resistor, and the second end of the sampling unit is the second end of the three-terminal voltage regulator.
In a further refinement, the first light coupling unit includes: the fourth capacitor, the seventh resistor, the eighth resistor, the ninth resistor and the first optocoupler;
an eighth resistor is connected between the first end of the first optical coupler and the second end of the first optical coupler, one end of the eighth resistor is electrically connected with one end of the ninth resistor, and the other end of the ninth resistor is connected with the on-screen power supply;
a second end of the first optocoupler is electrically connected with one end of the seventh resistor, and the other end of the seventh resistor is electrically connected with one end of the fourth capacitor;
the first end of the first optical coupling unit is the other end of the fourth capacitor, the second end of the first optical coupling unit is the second end of the first optical coupler, the third end of the first optical coupling unit is the other end of the ninth resistor, the fourth end of the first optical coupling unit is the third end of the first optical coupler, and the fifth end of the first optical coupling unit is the fourth end of the first optical coupler.
In a further refinement, the switching circuit comprises: a second switch unit and a second optical coupler unit; the first end of the second switch unit is electrically connected with the mainboard, and the second end of the second switch unit is electrically connected with the first end of the second optocoupler unit; the second end of the second optical coupling unit is electrically connected with the power supply on the screen, the third end of the second optical coupling unit is electrically connected with the power supply circuit, and the fourth end of the second optical coupling unit is connected with the direct-current power supply.
In a further refinement, the second switching unit comprises: the second diode, the tenth resistor, the eleventh resistor, the fifth capacitor and the second triode; the anode of the second diode is electrically connected with the main board, the cathode of the second diode is electrically connected with one end of the tenth resistor, and the other end of the tenth resistor is electrically connected with one end of the eleventh resistor, one end of the fifth capacitor and the base of the second triode; the other end of the eleventh resistor, the other end of the fifth capacitor and an emitting electrode of the second triode are all grounded; the collector of the second diode is the second end of the second switch unit.
In a further refinement, the second light coupling unit includes: a second optocoupler, a twelfth resistor and a thirteenth resistor;
a first end of the second optical coupler is electrically connected with one end of the twelfth resistor;
the first end of the second optical coupler is the first end of the second optical coupler unit, the other end of the twelfth resistor is the second end of the second optical coupler unit, the third end of the second optical coupler is the third end of the second optical coupler unit, and the fourth end of the second optical coupler is the fourth end of the second optical coupler unit.
An OLED television comprising an OLED drive power supply as described above.
Compared with the prior art, in the OLED driving power supply and the OLED television provided by the invention, the OLED driving power supply comprises: the OLED display screen comprises a main power supply, an on-screen power supply and a main board, wherein the on-screen power supply and the main board are electrically connected with the main power supply, the main board is used for outputting a switching signal and an OLED control signal, and the on-screen power supply is used for turning on or turning off the OLED screen according to the OLED control signal; the main power supply includes: a power supply circuit and a standby circuit; the first end of the standby circuit is electrically connected with the power supply circuit, the second end of the standby circuit is electrically connected with the mainboard, and the third end of the standby circuit is electrically connected with the on-screen power supply; and the power supply circuit outputs a standby signal or a working signal to the mainboard according to the switching signal. The standby circuit receives the switch signal, and then outputs the standby signal or the working signal to the mainboard to control the standby or the working of the mainboard.
Drawings
FIG. 1 is a block diagram of an OLED driving power supply provided by the present invention;
FIG. 2 is a schematic diagram of a portion of the circuitry of the on-screen power supply provided by the present invention;
FIG. 3 is a schematic circuit diagram of another portion of the on-screen power supply provided by the present invention;
FIG. 4 is a block diagram of an OLED driving power supply including a power supply circuit part according to the present invention;
FIG. 5 is a block diagram of the mechanism of the standby circuit portion of the on-screen power supply provided by the present invention;
fig. 6 is a schematic circuit diagram of a first switching unit provided in the present invention;
fig. 7 is a schematic circuit diagram of a sampling unit, a first optical coupler unit and an output unit provided in the present invention;
fig. 8 is a schematic circuit diagram of a switching circuit according to the present invention.
The reference numbers illustrate:
100. a main power supply; 200. an on-screen power supply; 300. a main board; 101. a standby circuit; 102. a power supply circuit; 110. a power supply filter circuit; 111. a power factor correction circuit; 112. a third LLC circuit; 113. a third rectifying point path; 114. a fourth LLC circuit; 115. a fourth rectifying circuit; 120. a switching circuit; 121. a voltage reduction circuit; 130. a sampling unit; 131. a first optical coupling unit; 132. an output unit; 140. a second optical coupling unit; 141. a second switching unit; d1, a first diode; d2, a second diode; r1, a first resistor; r2, a second resistor; r3, third resistor; r4, fourth resistor; r5, fifth resistor; r6, sixth resistor; r7, seventh resistor; r8, eighth resistor; r9, ninth resistor; r10, tenth resistor; r11, eleventh resistor; r12, twelfth resistor; r13, thirteenth resistor; r14, fourteenth resistance; r15, fifteenth resistor; r16, sixteenth resistor; r17, seventeenth resistor; r18, eighteenth resistor; c1, a first capacitance; c2, a second capacitor; c3, a third capacitance; c4, a fourth capacitance; c5, a fifth capacitance; c6, a sixth capacitor; c7, a seventh capacitance; q1, the first triode; q2, the second triode; u1, three-terminal regulator; u2, a first optocoupler; u3, second optical coupler.
Detailed Description
In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may also be present. Further, "connected" or "coupled" as used herein may include wirelessly connected or wirelessly coupled. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The inventor has found that the oled (organic light emitting diode) does not need a backlight, does not need a color filter and a liquid crystal, can emit light by itself, is superior to the conventional LCD and LED in terms of image quality, response speed, thickness, viewing angle, and the like, and is widely used. At present, the power supply of the OLED television needs to meet the requirement of power supply output stability, and has complex circuit and high cost
In order to solve the above problems, the present invention provides an OLED driving power supply and an OLED television, wherein the OLED driving power supply includes: the OLED display screen comprises a main power supply, an on-screen power supply and a main board, wherein the on-screen power supply and the main board are electrically connected with the main power supply, the main board is used for outputting a switching signal and an OLED control signal, and the on-screen power supply is used for turning on or turning off the OLED screen according to the OLED control signal; the main power supply includes: a power supply circuit and a standby circuit; the first end of the standby circuit is electrically connected with the power supply circuit, the second end of the standby circuit is electrically connected with the mainboard, and the third end of the standby circuit is electrically connected with the on-screen power supply; and the power supply circuit outputs a standby signal or a working signal to the mainboard according to the switching signal. The standby circuit receives the switch signal, and then outputs the standby signal or the working signal to the mainboard to control the standby or the working of the mainboard.
Various non-limiting embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an OLED driving power supply according to the present invention includes: the OLED display device comprises a main power supply 100, an on-screen power supply 200 and a main board 300, wherein the on-screen power supply 200 and the main board 300 are both electrically connected with the main power supply 100, the main board 300 is used for outputting a switching signal and an OLED control signal, and the on-screen power supply 200 is used for turning on or turning off an OLED screen according to the OLED control signal; the main power supply 100 includes: a power supply circuit 102 and a standby circuit 101; a first end of the standby circuit 101 is electrically connected to the power supply circuit 102, a second end of the standby circuit 101 is electrically connected to the motherboard 300, and a third end of the standby circuit 101 is electrically connected to the on-screen power supply 200; the power supply circuit 102 outputs a standby signal or a working signal to the motherboard 300 according to the switching signal.
In an embodiment of the present invention, the switching signal ON/OFF) includes an ON signal (ON) and an OFF signal (OFF). When the motherboard 300 outputs an ON signal (ON) to the standby circuit 101, the standby circuit 101 controls the power supply circuit 102 to output a working signal to the motherboard 300 based ON the ON signal (ON); when the main board 300 outputs an OFF signal (OFF) to the standby circuit 101, the standby circuit 101 outputs a standby signal to the main board 300 based on the OFF signal (OFF).
In the embodiment of the present invention, when the standby circuit 101 outputs the working signal to the main board 300, the main board 300 monitors the connection state, and if the connection state is normal, the main board 300 outputs the OLED control signal to the power supply circuit 102 to control the power supply circuit 102 to output the first signal and the second signal to the on-screen power supply 200. Wherein the first signal may be 390V isolated dc, and the second signal may be 20V isolated dc; the OLED control signal is a high level signal output from the OLED control terminal (MB _ DET), and it can be understood that the OLED control terminal (MB _ DET) is set high when the connection state is normal.
In the embodiment of the invention, after the power supply circuit 102 outputs the first signal and the second signal to the ON-screen power supply 200, the ON-screen power supply 200 outputs MB-12V to the ON-screen motherboard 300, the ON-screen motherboard 300 is set to be high VDD-ON and EVDD-ON, and the ON-screen power supply 200 outputs VDD-12V and EVDD-22V to supply power to the screen body.
Specifically, referring to fig. 2 and 3, the on-screen power supply 200 includes a first LLC circuit, a first rectifying circuit, a switching circuit, a second LLC circuit, and a second rectifying circuit. The first LLC circuit receives the first signal and the second signal, namely 390V isolation direct current and 20V isolation direct current are input into the first LLC circuit, then an MB-12V signal is output through the first rectification circuit, and the MB-12V signal is input into the switching circuit to obtain a VDD-12V signal; wherein MB-12V supplies power for the on-screen mainboard 300, and VDD-12V inputs the power of the screen body.
The second LLC circuit receives the first signal and the second signal, namely, 390V isolation direct current and 20V isolation direct current are input into the second LLC circuit, and the EVDD _20V is output to the OLED screen T-con through the second rectification circuit. When the MB-12V supplies power to the ON-screen motherboard 300, the ON-screen motherboard 300 sets VDD _ ON high, and the second rectifying circuit outputs stable EVDD _ 20V.
In the embodiment of the present invention, referring to fig. 4, the power supply circuit 102 includes: a power supply filter circuit 110, a power factor correction circuit 111, a third LLC circuit 112, a fourth LLC circuit 114, a third rectified current and a fourth rectification circuit 115. The power filter circuit 110 is connected to the ac mains and outputs a voltage signal to the power factor correction circuit 111, one output of the power factor correction circuit 111 is connected to the third LLC circuit 112, and the other output of the power factor correction circuit 111 is connected to the fourth LLC circuit 114. The power factor correction circuit 111 is a bridgeless PFC circuit.
In practical implementation, when the main board 300 outputs a switching signal (ON/OFF) to the standby circuit 101, the standby circuit 101 controls the power factor correction circuit 111 to operate or stand by according to the switching signal (ON/OFF).
Specifically, the main board 300 outputs an ON signal (ON) to the standby circuit 101, the Auto-stb terminal of the power factor correction circuit 111 is set to be a high level signal through the standby circuit 101, the power factor correction circuit 111 works normally, and 390VDC is output to the third LLC circuit 112 and the fourth LLC circuit 114; the main board 300 starts the third LLC control circuit through timing control to output a working signal to the main board 300, where the working signal includes a +12V voltage signal and a +20V voltage signal, where the +12V voltage signal supplies power to the main board 300, and the +20V voltage signal supplies power to the Audio of the main board 300. When the main board 300 monitors that the connection state is normal, the OLED control signal is output so that the fourth LLC circuit 114 outputs 390V isolated direct current and 20V isolated direct current through the fourth rectifying circuit 115.
Specifically, the main board 300 outputs an OFF signal (OFF) to the standby circuit 101, the Auto-stb terminal of the pfc circuit 111 is set to a low level signal by the standby circuit 101, and the pfc circuit 111 is in standby to output a standby signal to the main board 300, wherein the standby signal includes a +10V voltage signal and a +16V voltage signal.
In the embodiment of the present invention, when the main board 300 outputs an ON signal (ON) to the standby circuit 101, the Auto-stb terminal of the power factor correction circuit 111 is set to be high by the standby circuit 101, and when the main board 300 outputs an OFF signal (OFF) to the standby circuit 101, the Auto-stb terminal of the power factor correction circuit 111 is set to be low by the standby circuit 101. Accurate switching of the OLED power supply can be ensured.
Specifically, referring to fig. 5, the standby circuit 101 includes: a voltage-reducing circuit 121 and a switching circuit 120; a first end of the voltage-reducing circuit 121 is electrically connected to the motherboard 300, a second end of the voltage-reducing circuit 121 is electrically connected to the on-screen power supply 200, and a third end of the voltage-reducing circuit 121 is electrically connected to the power supply circuit 102; a first terminal of the switch circuit 120 is electrically connected to the motherboard 300, a second terminal of the switch circuit 120 is electrically connected to the on-screen power supply 200, and a third terminal of the switch circuit 120 is electrically connected to the power supply circuit 102.
In the embodiment of the present invention, the voltage-reducing circuit 121 includes a first switching unit, a sampling unit 130, a first optical coupling unit 131, and an output unit 132; a first end of the first switch unit is electrically connected to the main board 300, and a second end of the first switch unit is electrically connected to a first end of the sampling unit 130, a first end of the first optical coupler unit 131, and a first end of the output unit 132; a second end of the sampling unit 130 is electrically connected with a second end of the first optical coupling unit 131; the third end of the first optical coupler unit 131 is connected to the on-screen power supply 200, and the fourth end and the fifth end of the first optical coupler unit 131 are electrically connected to the power supply circuit 102.
In an embodiment of the present invention, referring to fig. 6, the first switching unit includes: the circuit comprises a first diode D1, a first resistor R1, a second resistor R2, a first capacitor C1, a first triode Q1, a third resistor R3 and a fourth resistor R4; an anode of the first diode D1 is electrically connected with the main board 300, and a cathode of the first diode D1 is electrically connected with one end of the first resistor R1; the other end of the first resistor R1 is electrically connected with one end of the second resistor R2, one end of the first capacitor C1 and the base of the first triode Q1; the other end of the second resistor R2, the other end of the second capacitor C2 and the emitter of the first triode Q1 are all grounded; the collector of the first triode Q1 is electrically connected with one end of the third resistor R3; the other end of the third resistor R3 is electrically connected with one end of the fourth resistor R4; the first terminal of the first switch unit is an anode of the first diode D1, and the second terminal of the first switch unit is the other terminal of the fourth resistor R4.
Further, referring to fig. 7, the sampling unit 130 includes: a fifth resistor R5, a sixth resistor R6, a three-terminal regulator U1, a second capacitor C2 and a third capacitor C3; one end of the fifth resistor R5 is electrically connected to one end of the sixth resistor R6, the second end of the first switching unit, the input end of the three-terminal regulator U1, one end of the second capacitor C2, the first end of the first optical coupler unit 131, and the first end of the output unit 132; the other end of the fifth resistor R5, the other end of the sixth resistor R6, the grounding end of the three-terminal regulator U1 and one end of the third capacitor C3 are all grounded; the output end of the three-terminal regulator U1 is electrically connected with the other end of the second capacitor C2 and the second end of the first optical coupling unit 131; a third capacitor C3 is connected between the second end of the three-terminal regulator U1 and the third end of the three-terminal regulator U1; the first terminal of the sampling unit 130 is one terminal of the fifth resistor R5, and the second terminal of the sampling unit 130 is the second terminal of the three-terminal regulator U1.
Further, the first light coupling unit 131 includes: a fourth capacitor C4, a seventh resistor R7, an eighth resistor R8 and a first optocoupler U2; an eighth resistor R8 is connected between the first end of the first optical coupler U2 and the second end of the first optical coupler U2, and one end of the eighth resistor R8 is electrically connected with the output unit 132; a second end of the first optical coupler U2 is electrically connected with one end of the seventh resistor R7, and the other end of the seventh resistor R7 is electrically connected with one end of the fourth capacitor C4; the first end of first opto-coupler unit 131 is the fourth electric capacity C4 other end, the second end of first opto-coupler unit 131 is the second end of first opto-coupler U2, the third end of first opto-coupler unit 131 is the first end of first opto-coupler U2, the fourth end of first opto-coupler unit 131 is the third end of first opto-coupler U2, the fifth end of first opto-coupler unit 131 is the fourth end of first opto-coupler U2.
In the embodiment of the present invention, when the main board 300 sends an OFF signal (OFF) to the standby circuit 101, the first transistor Q1 is turned OFF, and the downward-biased resistor of the sampling unit 130 is connected in parallel by the fifth resistor R5 and the sixth resistor R6, so that the current of the three-terminal regulator U1 is increased, and further the current of the first optical coupler U2 is increased, and since the first optical coupler U2 is connected to the power supply circuit 102, the output of the power supply circuit 102 is controlled to be the standby signal (10V and 16V), thereby implementing low standby power consumption. When the main board 300 sends an ON signal (ON) to the standby circuit 101, the first transistor Q1 is turned ON; the fifth resistor R5 and the sixth resistor R6 form a first parallel resistor, the third resistor R3 and the fourth resistor R4 form a second parallel resistor, and the downward bias resistor of the sampling unit 130 is an equivalent resistor formed by connecting the first parallel resistor and the second parallel resistor in parallel, so that the current of the three-terminal voltage regulator U1 is reduced, the current of the first optical coupler U2 is reduced, and the first optical coupler U2 is connected with the power supply circuit 102, so that the output of the power supply circuit 102 is controlled to be working signals (12V and 20V).
In an embodiment of the present invention, the output circuit includes: a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a sixth capacitor C6 and a seventh capacitor C7. One end of the fourteenth resistor R14 is connected to the on-screen power supply 200, one end of the fifteenth resistor R15 and one end of the sixteenth resistor R16, and the other end of the fourteenth resistor R14 is connected to the first end of the first optical coupler U2; the other end of the fifteenth resistor R15 is connected to one end of a sixth capacitor C6, one end of a seventeenth resistor R17 and one end of a seventh capacitor C7, and the other end of the sixth capacitor C6 is connected to the other end of the sixteenth resistor R16; the other end of the seventeenth resistor R17 is connected to one end of an eighteenth resistor R18, and the other end of the eighteenth resistor R18 is connected to the other end of the seventeenth resistor R17. One end of the eighteenth resistor R18 and the other end of the seventeenth resistor R17 are output ends, and the output ends can be connected with a power amplifier.
In an embodiment of the present invention, referring to fig. 8, the switch circuit 120 includes: a second switching unit 141 and a second optical coupling unit 140; a first end of the second switch unit 141 is electrically connected to the main board 300, and a second end of the second switch unit 141 is electrically connected to a first end of the second optical coupling unit 140; a second end of the second optical coupling unit 140 is electrically connected to the on-screen power supply 200, a third end of the second optical coupling unit 140 is electrically connected to the power supply circuit 102, and a fourth end of the second optical coupling unit 140 is connected to a dc power supply.
Further, the second switching unit 141 includes: the circuit comprises a second diode D2, a tenth resistor R10, an eleventh resistor R11, a fifth capacitor C5 and a second triode Q2; an anode of the second diode D2 is electrically connected to the main board 300, a cathode of the second diode D2 is electrically connected to one end of the tenth resistor R10, and the other end of the tenth resistor R10 is electrically connected to one end of the eleventh resistor R11, one end of the fifth capacitor C5, and a base of the second transistor Q2; the other end of the eleventh resistor R11, the other end of the fifth capacitor C5 and the emitter of the second triode Q2 are all grounded; the collector of the second diode D2 is the second terminal of the second switching unit 141.
Further, the second light coupling unit 140 includes: a second optocoupler U3, a twelfth resistor R12 and a thirteenth resistor R13; a first end of the second optical coupler U3 is electrically connected with one end of the twelfth resistor R12; the first end of the second optical coupler U3 is the first end of the second optical coupler unit 140, the other end of the twelfth resistor R12 is the second end of the second optical coupler unit 140, the third end of the second optical coupler U3 is the third end of the second optical coupler unit 140, and the fourth end of the second optical coupler U3 is the fourth end of the second optical coupler unit 140.
In the embodiment of the present invention, when the main board 300 sends an ON signal (ON) to the standby circuit 101, the second transistor Q2 is turned ON, and the second optocoupler U3 turns ON the internal transistor, so that the Auto-stb terminal of the power factor correction circuit 111 is at a high level, and the power factor correction circuit 111 operates normally.
When the main board 300 sends an OFF signal (OFF) to the standby circuit 101, the second transistor Q2 is turned OFF, and the second optocoupler U3 turns OFF the internal transistor, so that the Auto-stb terminal of the power factor correction circuit 111 is at a low level, and the power factor correction circuit 111 is turned OFF, and then in a standby state.
In the embodiment of the present invention, when the main board 300 sends an ON signal (ON) to the standby circuit 101, the power factor correction circuit 111 operates normally and the output of the power supply circuit 102 is an operating signal (12V and 20V), and when the main board 300 sends an OFF signal (OFF) to the standby circuit 101, the power factor correction circuit 111 stands by and the output of the power supply circuit 102 is a standby signal (10V and 16V).
In an embodiment of the present invention, the OLED driving power supply includes: the OLED display screen comprises a main power supply, an ON-screen power supply and a main board, wherein the ON-screen power supply and the main board are electrically connected with the main power supply, the main board is used for outputting a switching signal (ON/OFF) and an OLED control signal, and the ON-screen power supply is used for turning ON or turning OFF the OLED screen according to the OLED control signal; the main power supply includes: a power supply circuit and a standby circuit; the first end of the standby circuit is electrically connected with the power supply circuit, the second end of the standby circuit is electrically connected with the mainboard, and the third end of the standby circuit is electrically connected with the on-screen power supply; and the power supply circuit outputs a standby signal or a working signal to the mainboard according to the switching signal (ON/OFF). The standby circuit receives the switching signal (ON/OFF), and then outputs the standby signal or the working signal to the mainboard to control the mainboard to be standby or work.
Based on the above-mentioned OLED driving power supply, the present invention also provides an OLED television including the OLED driving power supply as described above, which is not described in detail herein since the OLED driving power supply has been described in detail above.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (10)
1. An OLED driving power supply, comprising:
the OLED display screen comprises a main power supply, an on-screen power supply and a main board, wherein the on-screen power supply and the main board are electrically connected with the main power supply, the main board is used for outputting a switching signal and an OLED control signal, and the on-screen power supply is used for turning on or turning off the OLED screen according to the OLED control signal;
the main power supply includes: a power supply circuit and a standby circuit; the first end of the standby circuit is electrically connected with the power supply circuit, the second end of the standby circuit is electrically connected with the mainboard, and the third end of the standby circuit is electrically connected with the on-screen power supply; the power supply circuit outputs a standby signal or a working signal to the mainboard according to the switching signal;
when the mainboard outputs a switching signal to a standby circuit, the standby circuit controls the power supply circuit to output a working signal or a standby signal to the mainboard based on the switching signal;
when the standby circuit controls the power supply circuit to output a working signal to the mainboard, the mainboard monitors the connection state, and if the connection state is normal, the OLED control signal is output to the power supply circuit to control the power supply circuit to output a first signal and a second signal to the on-screen power supply.
2. The OLED driving power supply according to claim 1, wherein the standby circuit comprises:
a voltage reduction circuit and a switch circuit;
the first end of the voltage reduction circuit is electrically connected with the mainboard, the second end of the voltage reduction circuit is electrically connected with the power supply on the screen, and the third end of the voltage reduction circuit is electrically connected with the power supply circuit; the first end of the switch circuit is electrically connected with the mainboard, the second end of the switch circuit is electrically connected with the power supply on the screen, and the third end of the switch circuit is electrically connected with the power supply circuit.
3. The OLED driving power supply according to claim 2, wherein the voltage-reducing circuit comprises a first switching unit, a sampling unit, a first optical coupling unit and an output unit;
the first end of the first switch unit is electrically connected with the mainboard, and the second end of the first switch unit is electrically connected with the first end of the sampling unit, the first end of the first optical coupler unit and the first end of the output unit;
the second end of the sampling unit is electrically connected with the second end of the first optical coupling unit;
the third end of the first optical coupling unit is connected with the on-screen power supply, and the fourth end and the fifth end of the first optical coupling unit are electrically connected with the power supply circuit.
4. The OLED driving power supply according to claim 3, wherein the first switching unit comprises: the circuit comprises a first diode, a first resistor, a second resistor, a first capacitor, a first triode, a third resistor and a fourth resistor;
the anode of the first diode is electrically connected with the mainboard, and the cathode of the first diode is electrically connected with one end of the first resistor; the other end of the first resistor is electrically connected with one end of the second resistor, one end of the first capacitor and a base electrode of the first triode; the other end of the second resistor, the other end of the first capacitor and the emitting electrode of the first triode are all grounded; the collector of the first triode is electrically connected with one end of the third resistor; the other end of the third resistor is electrically connected with one end of the fourth resistor;
the first end of the first switch unit is the anode of the first diode, and the second end of the first switch unit is the other end of the fourth resistor.
5. The OLED driving power supply according to claim 3, wherein the sampling unit comprises: the third resistor, the fourth resistor, the fifth resistor, the sixth resistor, the three-terminal voltage regulator, the second capacitor and the third capacitor;
one end of the fifth resistor is electrically connected with one end of the sixth resistor, the second end of the first switching unit, the input end of the three-terminal regulator, one end of the second capacitor, the first end of the first optical coupler unit and the first end of the output unit;
the other end of the fifth resistor, the other end of the sixth resistor, the grounding end of the three-terminal voltage stabilizer and one end of the third capacitor are all grounded;
the output end of the three-terminal voltage stabilizer is electrically connected with the other end of the second capacitor and the second end of the first optical coupling unit;
a third capacitor is connected between the second end of the three-terminal regulator and the third end of the three-terminal regulator;
and the first end of the sampling unit is one end of the fifth resistor, and the second end of the sampling unit is the second end of the three-terminal voltage regulator.
6. The OLED driving power supply according to claim 3, wherein the first light coupling unit comprises: the fourth capacitor, the seventh resistor, the eighth resistor and the first optocoupler;
an eighth resistor is connected between the first end of the first optical coupler and the second end of the first optical coupler, and one end of the eighth resistor is electrically connected with the output unit;
a second end of the first optocoupler is electrically connected with one end of the seventh resistor, and the other end of the seventh resistor is electrically connected with one end of the fourth capacitor;
the first end of the first optical coupling unit is the other end of the fourth capacitor, the second end of the first optical coupling unit is the second end of the first optical coupler, the third end of the first optical coupling unit is the first end of the first optical coupler, the fourth end of the first optical coupling unit is the third end of the first optical coupler, and the fifth end of the first optical coupling unit is the fourth end of the first optical coupler.
7. The OLED drive power supply of claim 2, wherein the switching circuit includes: a second switch unit and a second optical coupler unit; the first end of the second switch unit is electrically connected with the mainboard, and the second end of the second switch unit is electrically connected with the first end of the second optocoupler unit; the second end of the second optical coupling unit is electrically connected with the power supply on the screen, the third end of the second optical coupling unit is electrically connected with the power supply circuit, and the fourth end of the second optical coupling unit is connected with the direct-current power supply.
8. The OLED driving power supply according to claim 7, wherein the second switching unit comprises: the second diode, the tenth resistor, the eleventh resistor, the fifth capacitor and the second triode; the anode of the second diode is electrically connected with the main board, the cathode of the second diode is electrically connected with one end of the tenth resistor, and the other end of the tenth resistor is electrically connected with one end of the eleventh resistor, one end of the fifth capacitor and the base of the second triode; the other end of the eleventh resistor, the other end of the fifth capacitor and an emitting electrode of the second triode are all grounded; the collector of the second diode is the second end of the second switch unit.
9. The OLED driving power supply according to claim 7, wherein the second light coupling unit comprises: a second optocoupler, a twelfth resistor and a thirteenth resistor;
a first end of the second optical coupler is electrically connected with one end of the twelfth resistor;
the first end of the second optical coupler is the first end of the second optical coupler unit, the other end of the twelfth resistor is the second end of the second optical coupler unit, the third end of the second optical coupler is the third end of the second optical coupler unit, and the fourth end of the second optical coupler is the fourth end of the second optical coupler unit.
10. An OLED television comprising an OLED driving power supply according to any one of claims 1 to 9.
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| CN202011210774.9A CN112349249B (en) | 2020-11-03 | 2020-11-03 | OLED driving power supply and OLED television |
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| CN202011210774.9A CN112349249B (en) | 2020-11-03 | 2020-11-03 | OLED driving power supply and OLED television |
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| CN112349249B true CN112349249B (en) | 2021-12-28 |
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| CN200950637Y (en) * | 2006-09-26 | 2007-09-19 | 青岛海信电器股份有限公司 | Low-power consumption standing circuit and television set having the same |
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| CN109119021A (en) * | 2018-09-07 | 2019-01-01 | 深圳创维－Rgb电子有限公司 | A kind of OLED driving power and OLED TV |
| CN109166519A (en) * | 2018-09-07 | 2019-01-08 | 深圳创维－Rgb电子有限公司 | A kind of OLED driving power and OLED TV |
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| CN200950637Y (en) * | 2006-09-26 | 2007-09-19 | 青岛海信电器股份有限公司 | Low-power consumption standing circuit and television set having the same |
| CN202394143U (en) * | 2011-09-28 | 2012-08-22 | 深圳麦格米特电气股份有限公司 | Control circuit capable of reducing standby power consumption of switching power supply |
| CN109119021A (en) * | 2018-09-07 | 2019-01-01 | 深圳创维－Rgb电子有限公司 | A kind of OLED driving power and OLED TV |
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| CN112349249A (en) | 2021-02-09 |
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