CN211606852U - LED backlight control circuit and interactive intelligent panel - Google Patents
LED backlight control circuit and interactive intelligent panel Download PDFInfo
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- CN211606852U CN211606852U CN201921664054.2U CN201921664054U CN211606852U CN 211606852 U CN211606852 U CN 211606852U CN 201921664054 U CN201921664054 U CN 201921664054U CN 211606852 U CN211606852 U CN 211606852U
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Abstract
The utility model relates to a LED backlight control circuit and mutual intelligence are dull and stereotyped. The utility model discloses a LED backlight source control circuit comprises a system mainboard, a power panel and an LED backlight module, wherein the LED backlight module comprises a plurality of LED lamp strips; a TV main chip and an integrated power supply module are arranged on the system mainboard, and the integrated power supply module supplies power to the TV main chip; the integrated power supply module is provided with a first backlight adjusting circuit, the power panel is provided with a second backlight adjusting circuit, and the first backlight adjusting circuit and the second backlight adjusting circuit are respectively connected with different LED lamp bars and respectively provide backlight power for the different LED lamp bars. The utility model discloses a LED backlight control circuit can use the power strip of the different specifications of integrated board card cooperation of same specification to be not unidimensional TV or the dull and stereotyped LED backlight power supply of mutual intelligence, and the cost is lower.
Description
Technical Field
The utility model relates to a dull and stereotyped field of intelligence especially relates to a LED backlight control circuit and mutual intelligence are dull and stereotyped.
Background
At present, the main circuit components of a television or an interactive intelligent panel comprise a plurality of different components such as a TV main control panel, a PC signal adapter panel, and a power panel, wherein the power panel supplies power to each different component and a backlight source of the television or the interactive intelligent panel, and the components are respectively arranged, so that the power supply connection relationship between each component and the power panel is complex. If the components such as the TV main control board, the PC signal adapter board and the like are integrated with the power panel on one board card, although the connection relationship among the components can be reduced, because the power of the LED backlight sources of televisions with different sizes or interactive intelligent panels is different, in order to match the LED backlight sources with different power, the integrated board cards with different specifications need to be produced, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a LED backlight control circuit and mutual intelligence are dull and stereotyped, its power strip that uses the different specifications of integrated board card cooperation of same specification is not unidimensional TV or the dull and stereotyped LED backlight power supply of mutual intelligence, and the cost is lower.
In a first aspect, the utility model provides a LED backlight source control circuit, which comprises a system mainboard, a power panel and an LED backlight module, wherein the LED backlight module comprises a plurality of LED lamp strips;
a TV main chip and an integrated power supply module are arranged on the system mainboard, and the integrated power supply module supplies power to the TV main chip;
the integrated power supply module is provided with a first backlight adjusting circuit, the power panel is provided with a second backlight adjusting circuit, and the first backlight adjusting circuit and the second backlight adjusting circuit are respectively connected with different LED lamp bars and respectively provide backlight power for the different LED lamp bars.
Optionally, the plurality of LED light bars includes a first LED light bar and a second LED light bar, and the first LED light bar and the second LED light bar are arranged at an interval;
the first backlight adjusting circuit is connected with the first LED lamp strip, and the second backlight adjusting circuit is connected with the second LED lamp strip.
Optionally, the plurality of LED light bars form at least one group of LED light bars, each group of LED light bars includes a plurality of first LED light bars and a plurality of second LED light bars, wherein the plurality of first LED light bars and the plurality of second LED light bars are arranged at intervals;
the first backlight adjusting circuit is connected with the first LED lamp strips, and the second backlight adjusting circuit is connected with the second LED lamp strips.
Optionally, the at least one group of LED light bars form an array of LED light bars in multiple rows and columns; in the LED light bar array, the first LED light bar and the second LED light bar are arranged at intervals.
Optionally, the TV main chip includes a reference signal output terminal;
the first backlight adjusting circuit comprises a first reference signal input end, and the second backlight adjusting circuit comprises a second reference signal input end;
the reference signal output end is respectively connected with the first reference signal input end and the second reference signal input end, and the reference signal output end is used for respectively outputting reference signals so as to respectively adjust the output currents of the first backlight adjusting circuit and the second backlight adjusting circuit.
Optionally, a PC signal switching module is further disposed on the system motherboard;
and the integrated power supply module supplies power to the PC signal switching module.
Optionally, the integrated power module further includes a T-CON power output terminal for supplying power to the T-CON board.
In a second aspect, the present invention provides an interactive intelligent tablet, comprising a PC module and the LED backlight source control circuit according to the first aspect of the present invention;
and the PC module is used for being connected with the PC signal switching module.
Optionally, the solar panel further comprises a T-CON plate;
the T-CON board is powered by the integrated power module.
The embodiment of the utility model provides a LED backlight control circuit and mutual intelligence are dull and stereotyped, set up TV main chip and integrated power module on same integrated circuit board, reduce the relation of connection between former power module and each module, to the problem that integrated power module is not enough to LED backlight power supply power, set up a special power strip and come to be the LED backlight power supply together with integrated power module, thereby can use the power strip of the different specifications of integrated circuit board cooperation of same specification to the dull and stereotyped LED backlight power supply of not unidimensional TV or mutual intelligence, the manufacturing cost of integrated circuit board has been reduced.
For better understanding and implementation, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of an LED backlight control circuit according to an exemplary embodiment of the present invention;
fig. 2 is a schematic structural diagram of an LED backlight control circuit according to an exemplary embodiment of the present invention;
fig. 3 is a schematic diagram of an arrangement of LED light bars of an LED backlight control circuit according to an exemplary embodiment of the present invention;
fig. 4 is a schematic diagram of an arrangement of LED light bars of an LED backlight control circuit according to an exemplary embodiment of the present invention;
fig. 5 is the utility model discloses well mutual dull and stereotyped structure schematic diagram of intelligence.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present invention are shown in the drawings.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
In the following, several specific embodiments are given for describing the technical solution of the present application in detail. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention, in which the LED backlight control circuit can be applied to electronic devices such as televisions and interactive intelligent flat panels, and the interactive intelligent flat panel is used as an example below for illustration.
As shown in fig. 1, the LED backlight control circuit in this embodiment includes a system main board 10, a power board 20, and an LED backlight module 30. The LED backlight module 30 includes a plurality of LED light bars, and each LED light bar is composed of a plurality of LED light beads distributed uniformly.
The system main board 10 is used as a core control board card of an interactive smart tablet, and is integrated with a TV main chip 11 and an integrated power module 13, and in some examples, the system main board 10 is further integrated with a PC signal switching module 12. The integrated power module 13 is configured to provide power to the TV main chip 11 and the PC signal switching module 12, respectively.
The TV main chip 30, as a main control chip in the interactive smart tablet, typically integrates an analog and digital decoder, a demodulator, a central processing unit and an image processing unit, and may also have rich peripheral interfaces. The system main chip 30 may be connected to different operating systems through a channel switch, and may decode audio/video signals transmitted by the different operating systems and transmit the decoded audio/video signals to a screen and a speaker of the interactive smart tablet for audio/video playing.
The PC signal switching module 12 is configured to connect to a built-in PC module of the interactive smart tablet, an operating system runs on the PC module, the operating system may be a windows system, an android system, or the like, the PC signal switching module 12 is configured to output a power supply provided by the integrated power supply module 13 to the PC module, and simultaneously send an audio/video signal transmitted by the operating system of the PC module to the TV main chip 30, so that the TV main chip 30 transmits the audio/video signal to a screen and a speaker of the interactive smart tablet for audio/video playing.
The integrated power module 13 further includes a first backlight adjusting circuit 131, and the power board 20 is further provided with a second backlight adjusting circuit 201. The first backlight adjusting circuit 131 is configured to step down the dc power rectified and filtered by the integrated power module 13, and then output a constant current source to the LED load through the output end 132 of the first backlight adjusting circuit 131, and the second backlight adjusting circuit 201 is configured to step down the dc power rectified and filtered by the power board 20, and then output a constant current source to the LED load through the output end 202 of the second backlight adjusting circuit 201.
In this embodiment, the first backlight adjusting circuit 131 and the second backlight adjusting circuit 201 are respectively connected to different LED light bars and respectively provide backlight power for the different LED light bars.
The embodiment of the utility model provides a LED backlight control circuit, set up TV main chip and integrated power module on same integrated circuit board, reduce the relation of connection between former power module and each module, to the problem that integrated power module is not enough to LED backlight power supply power, set up special power strip and come to be the power supply of LED backlight together with integrated power module, thereby can use the power strip of the different specifications of integrated circuit board cooperation of same specification to the dull and stereotyped LED backlight power supply of not unidimensional TV or mutual intelligence, the manufacturing cost of integrated circuit board has been reduced.
In an exemplary embodiment, as shown in fig. 2, the first backlight adjusting circuit 131 further includes a first feedback circuit 133, and the first feedback circuit 133 is configured to detect a current signal of the LED light bar supplied by the first feedback circuit 133 and compare the current signal with a reference signal, so as to control an output current of the first backlight adjusting circuit 131 according to a comparison result. The second backlight adjusting circuit 201 further includes a second feedback circuit 203, where the second feedback circuit 203 is configured to detect a current signal of an LED light bar supplied by the second feedback circuit 203, and compare the current signal with a reference signal, so as to control an output current of the second backlight adjusting circuit 201 according to a comparison result.
Preferably, the reference signal is the same reference signal sent by the TV main chip 11, and the TV main chip is configured to receive an adjustment instruction input by a user and output the reference signal. Specifically, as shown in fig. 2, the TV main chip 11 includes a reference signal output end 111, the first feedback circuit 132 includes a first reference signal input end, the second feedback circuit 202 includes a second reference signal input end, and the reference signal output end 111 is connected to the first reference signal input end and the second reference signal input end respectively, and is configured to output a reference signal respectively so as to adjust output currents of the first backlight adjusting circuit 131 and the second backlight adjusting circuit 201 respectively.
In some examples, the reference signal may be a reference voltage signal, and the first feedback circuit 133 and the second feedback circuit 203 may include a comparison amplifying device that compares a voltage signal converted from a current signal of the LED light bar with the reference voltage signal and outputs a control signal to adjust output currents of the first backlight adjusting circuit 131 and the second backlight adjusting circuit 201, respectively.
In some examples, due to an error caused by the performance of the electronic component, the current output by the first backlight adjusting circuit 131 and the current output by the second backlight adjusting circuit 201 may have a deviation, and then the brightness of the LED lamp beads in the LED lamp strips powered by different backlight adjusting circuits may have a deviation. In order to reduce the influence caused by this deviation, the first backlight adjusting circuit 131 and the second backlight adjusting circuit 201 provide backlight power for the alternate LED light bars using the light bar spacing arrangement of the novel embodiment.
Specifically, as shown in fig. 3, in an embodiment, the LED backlight module 30 includes a plurality of horizontally disposed LED light bars, and the plurality of horizontally disposed LED light bars are sequentially and longitudinally arranged at the same interval distance, and the plurality of horizontally disposed LED light bars form a group of LED light bars, specifically including from the top to the bottom LED light bars 31 to 34. The LED light bars 31 and 33 are first LED light bars, and the LED light bars 32 and 34 are second LED light bars. The first LED light bar and the second LED light bar can be the same LED light bar or light bars with different specifications. In other examples, the number of the LED light bars may be other than a larger number, a plurality of LED light bars may be arranged in sequence and horizontally, and each LED light bar may be arranged vertically.
In fig. 3, the output end 132 of the first backlight adjusting circuit 131 is connected to the LED light bar 31 and the LED light bar 33, respectively, and the output end 202 of the second backlight adjusting circuit 201 is connected to the LED light bar 32 and the LED light bar 34, respectively. Therefore, when the current magnitudes output by the first backlight adjusting circuit 131 and the second backlight adjusting circuit 201 are different, the brightness of the LED backlight module 30 formed by the LED light bars 31 to 34 is more uniform.
In some interactive smart panels with larger screens, the LED backlight module may include a plurality of LED light bars, so as to form an array of LED light bars in multiple rows and columns, and for the same group of LED light bars, a plurality of first LED light bars and a plurality of second LED light bars are arranged at intervals, the first backlight adjusting circuit 131 is connected to the plurality of first LED light bars, and the second backlight adjusting circuit 201 is connected to the plurality of second LED light bars. For different groups of LED light bars, the first LED light bar and the second LED light bar are also spaced apart from each other in the adjacent group of LED light bars, that is, in the LED light bar array, the first LED light bar and the second LED light bar are spaced apart in both the row and column dimensions.
As shown in fig. 4, the array is exemplified by two columns and four rows. In fig. 4, the LED backlight module 30 includes a first row of LED light bars 31 to 34 from top to bottom, and a second row of LED light bars 35 to 38 from top to bottom. The LED light bar 31, the LED light bar 33, the LED light bar 36 and the LED light bar 38 are first light bars, the output end 132 of the first backlight adjusting circuit 131 is respectively connected to the LED light bar 31, the LED light bar 33, the LED light bar 36 and the LED light bar 38, the LED light bar 32, the LED light bar 34, the LED light bar 35 and the LED light bar 37 are second light bars, and the output end 202 of the second backlight adjusting circuit 201 is respectively connected to the LED light bar 32, the LED light bar 34, the LED light bar 35 and the LED light bar 37.
In some examples, as shown in fig. 1, the integrated power module 13 further includes a T-CON power output 132 for supplying power to a T-CON board, wherein the T-CON board is also called a logic board or a control board, and the T-CON is an acronym for timing Controller. The T-CON board is used for controlling the time sequence of the LVDS digital signals sent by the main board and converting row and column driving digital signals required by the glass substrate of the liquid crystal screen to drive the liquid crystal screen to display images.
Fig. 5 is a schematic structural diagram of an interactive intelligent flat plate in an embodiment of the present invention, the interactive intelligent flat plate is also called an intelligent interactive flat plate, which can be an integrated device that controls and implements man-machine interaction operations on the content displayed on the display flat plate by using a touch technology, and integrates one or more functions of a projector, an electronic whiteboard, a curtain, a sound, a television, a video conference terminal, and the like. As shown in fig. 5, the interactive smart tablet 500 includes a PC module 51, a housing, a liquid crystal display, a speaker 53, a T-CON board 52, and the LED backlight control circuit 100 of any of the above embodiments.
The PC module 51 is a built-in PC module of the interactive smart tablet 500, and is used for connecting with the PC signal switching module 12. An operating system runs in the PC module 51, the operating system may be a windows system, an android system, or the like, the PC signal switching module 12 is configured to output the power provided by the integrated power module 13 to the PC module 51, and simultaneously send an audio/video signal transmitted by the operating system of the PC module 51 to the TV main chip 30, so that the TV main chip 30 transmits the audio/video signal to a liquid crystal display and a speaker 53 of the interactive smart tablet 500 for audio/video playing, wherein the T-CON board 52 and the speaker 53 are both provided with power by the integrated power module 13.
The embodiment of the utility model provides a LED backlight control circuit and mutual intelligence are dull and stereotyped, with the TV main chip, module settings such as PC signal conversion module and integrated power module are on same integrated circuit board, reduce the relation of connection between former power module and each module, to the not enough problem of integrated power module to LED backlight power supply power, set up special power strip and come to be the LED backlight power supply together with integrated power module, thereby can use the power strip of the different specifications of integrated circuit board cooperation of same specification to the not unidimensional TV or the dull and stereotyped LED backlight power supply of mutual intelligence, the manufacturing cost of integrated circuit board has been reduced.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (9)
1. An LED backlight control circuit, its characterized in that:
the LED backlight module comprises a system main board, a power panel and an LED backlight module, wherein the LED backlight module comprises a plurality of LED light bars;
a TV main chip and an integrated power supply module are arranged on the system mainboard, and the integrated power supply module supplies power to the TV main chip;
the integrated power supply module is provided with a first backlight adjusting circuit, the power panel is provided with a second backlight adjusting circuit, and the first backlight adjusting circuit and the second backlight adjusting circuit are respectively connected with different LED lamp bars and respectively provide backlight power for the different LED lamp bars.
2. The LED backlight control circuit of claim 1, wherein:
the plurality of LED light bars comprise a first LED light bar and a second LED light bar, and the first LED light bar and the second LED light bar are arranged at intervals;
the first backlight adjusting circuit is connected with the first LED lamp strip, and the second backlight adjusting circuit is connected with the second LED lamp strip.
3. The LED backlight control circuit of claim 1, wherein:
the LED lamp strips form at least one group of LED lamp strips, each group of LED lamp strips comprises a plurality of first LED lamp strips and a plurality of second LED lamp strips, and the plurality of first LED lamp strips and the plurality of second LED lamp strips are arranged at intervals;
the first backlight adjusting circuit is connected with the first LED lamp strips, and the second backlight adjusting circuit is connected with the second LED lamp strips.
4. The LED backlight control circuit of claim 3, wherein:
the at least one group of LED lamp bars form an LED lamp bar array with multiple rows and multiple columns;
in the LED light bar array, the first LED light bar and the second LED light bar are arranged at intervals.
5. The LED backlight control circuit according to any one of claims 1 to 4, wherein:
the TV main chip comprises a reference signal output end;
the first backlight adjusting circuit comprises a first reference signal input end, and the second backlight adjusting circuit comprises a second reference signal input end;
the reference signal output end is respectively connected with the first reference signal input end and the second reference signal input end, and the reference signal output end is used for respectively outputting reference signals so as to respectively adjust the output currents of the first backlight adjusting circuit and the second backlight adjusting circuit.
6. The LED backlight control circuit of claim 1, wherein:
the system mainboard is also provided with a PC signal switching module;
and the integrated power supply module supplies power to the PC signal switching module.
7. The LED backlight control circuit of claim 1, wherein:
the integrated power supply module further comprises a T-CON power supply output end which is used for supplying power for the T-CON board.
8. The utility model provides an interactive intelligence is dull and stereotyped which characterized in that:
comprising a PC module and the LED backlight control circuit of any of claims 1 to 7;
and the PC module is used for being connected with the PC signal switching module.
9. The interactive smart tablet of claim 8, wherein:
also includes a T-CON plate;
the T-CON board is powered by the integrated power module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921664054.2U CN211606852U (en) | 2019-09-30 | 2019-09-30 | LED backlight control circuit and interactive intelligent panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921664054.2U CN211606852U (en) | 2019-09-30 | 2019-09-30 | LED backlight control circuit and interactive intelligent panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211606852U true CN211606852U (en) | 2020-09-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921664054.2U Active CN211606852U (en) | 2019-09-30 | 2019-09-30 | LED backlight control circuit and interactive intelligent panel |
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| Country | Link |
|---|---|
| CN (1) | CN211606852U (en) |
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- 2019-09-30 CN CN201921664054.2U patent/CN211606852U/en active Active
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