CN109496062A - Circuit board and display device - Google Patents
Circuit board and display device Download PDFInfo
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- CN109496062A CN109496062A CN201811600835.5A CN201811600835A CN109496062A CN 109496062 A CN109496062 A CN 109496062A CN 201811600835 A CN201811600835 A CN 201811600835A CN 109496062 A CN109496062 A CN 109496062A
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- 238000012545 processing Methods 0.000 claims abstract description 43
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000004973 liquid crystal related substance Substances 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 8
- 230000002159 abnormal effect Effects 0.000 description 6
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/117—Pads along the edge of rigid circuit boards, e.g. for pluggable connectors
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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]
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0213—Electrical arrangements not otherwise provided for
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Structure Of Printed Boards (AREA)
Abstract
The invention discloses a circuit board and a display device, comprising: a first circuit board and a second circuit board; the data processing module of the first circuit board comprises a first signal output end, and the first signal output end is connected with the first vacant pin; the power supply management module comprises an enabling signal control end, and the enabling signal control end is connected with the second vacant pin; and the third vacant pin of the second circuit board is in short circuit with the fourth vacant pin. Under the condition that the first circuit board and the second circuit board are normally plugged, the enabling signals output by the data processing module can be transmitted to the second circuit board from the first circuit board through the corresponding vacant pins and then transmitted back to the enabling signal control end of the corresponding power management module by the second circuit board, so that each power management module can output power signals under the control of the corresponding enabling signals. And when the first circuit board and the second circuit board are in plugging dislocation, the power management module can be prevented from outputting power signals, so that the circuit is protected.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a circuit board and a display device.
Background
In a currently used 3C product with a display screen, an assembly mode of a display module and a main control chip is usually adopted to drive the display screen to display. The display module can be connected with the main control chip through the circuit board, and the main control chip circuit board and the display module can be manufactured separately. After production is completed, the display module can be connected to pins of the circuit board through various data signal lines related to the display module, and then the circuit board is connected with the connector of the main control chip part, so that data transmission of the display module by the main control chip can be realized, and the display screen is driven to display different pictures.
The circuit board on one side of the display module generally has a golden finger connected with various data signal lines, the golden finger is matched with the connector on the side of the main control chip, but the golden finger can still be inserted into the connector in a biased or reverse manner, and at the moment, if the main control chip still outputs a normal power signal to the display module, the output power signal and a logic circuit on one side of the display module can be short-circuited, so that the device is damaged.
Disclosure of Invention
The invention provides a circuit board and a display device, which are used for avoiding the short circuit phenomenon under the condition of bias insertion or reverse insertion of the circuit board.
In a first aspect, the present invention provides a circuit board comprising: a first circuit board and a second circuit board;
the first circuit board includes: the power supply comprises a data processing module, a power supply management module, a first vacant pin and a second vacant pin; the second circuit board includes: a third vacant pin and a fourth vacant pin; wherein,
the first vacant pin corresponds to the third vacant pin, and the second vacant pin corresponds to the fourth vacant pin;
the data processing module comprises a first signal output end, and the first signal output end is connected with the first vacant pin;
the power supply management module comprises an enabling signal control end, and the enabling signal control end is connected with the second vacant pin;
and the third vacant pin is in short circuit with the fourth vacant pin.
In a possible implementation manner, in the circuit board provided by the present invention, the first circuit board further includes: a plurality of power signal output pins; the second circuit board includes: a plurality of power signal receiving pins corresponding to the power signal output pins one to one;
the power management module further comprises: a second signal output terminal;
the number of the power supply management modules is equal to that of the power supply signal output pins, and each power supply management module corresponds to each power supply signal output pin one to one;
and the second signal output end of each power management module is connected with each corresponding power signal output pin.
In a possible implementation manner, in the above circuit board provided by the present invention, the power management module further includes: a third signal output terminal for transmitting a ground signal;
the first circuit board further includes: a ground pin; the second circuit board further includes: a ground signal receiving pin corresponding to the ground pin;
the third signal output end is connected with the grounding pin.
In a possible implementation manner, in the above circuit board provided by the present invention, the second circuit board further includes: and the positive electrode of the light-emitting diode is connected with one power signal receiving pin, and the negative electrode of the light-emitting diode is connected with the grounding signal receiving pin.
In a possible implementation manner, in the circuit board provided by the present invention, the power signal output pin includes: an image signal output pin which transmits a power supply signal for image display;
the power management module includes: and the display power supply management module corresponds to the image signal output pins one to one.
In a possible implementation manner, in the circuit board provided by the present invention, the power signal output pin includes: the backlight signal output pin transmits a backlight power supply signal;
the power management module includes: and the backlight power supply management module corresponds to the signal output pins one to one.
In a possible implementation manner, in the above circuit board provided by the present invention, the data processing module further includes: a fourth signal output terminal; and the fourth signal output end is connected with the signal input end of the power management module.
In a possible implementation manner, in the circuit board provided by the present invention, the first circuit board further includes: a power signal conversion module;
and the signal output end of the power supply signal conversion module is connected with the signal input end of the power supply management module.
In a possible implementation manner, in the circuit board provided by the present invention, the first circuit board is a printed circuit board.
In a possible implementation manner, in the circuit board provided by the present invention, the second circuit board is a printed circuit board or a flexible circuit board.
In a second aspect, the present invention provides a display device comprising: any one of the circuit boards and a display screen connected with the circuit board.
In a possible implementation manner, in the display device provided by the invention, the display device is a liquid crystal display device or an organic light emitting diode display device.
The invention has the following beneficial effects:
the invention provides a circuit board and a display device, comprising: a first circuit board and a second circuit board; the first circuit board includes: the power supply comprises a data processing module, a power supply management module, a first vacant pin and a second vacant pin; the second circuit board includes: a third vacant pin and a fourth vacant pin; the first vacant pin corresponds to a third vacant pin, and the second vacant pin corresponds to a fourth vacant pin; the data processing module comprises a first signal output end, and the first signal output end is connected with the first vacant pin; the power supply management module comprises an enabling signal control end, and the enabling signal control end is connected with the second vacant pin; the third vacant pin is in short circuit with the fourth vacant pin. Under the condition that the first circuit board and the second circuit board are normally plugged, the enabling signals output by the data processing module can be transmitted to the second circuit board from the first circuit board through the corresponding vacant pins and then transmitted back to the enabling signal control end of the corresponding power management module by the second circuit board, so that each power management module can output power signals under the control of the corresponding enabling signals. And when the first circuit board and the second circuit board are in plugging dislocation, the power management module can be prevented from outputting power signals, so that the circuit is protected.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a circuit board according to the prior art;
FIG. 2 is a schematic structural view of the circuit board of FIG. 1 during normal plugging;
FIG. 3 is a schematic structural view of the circuit board of FIG. 1 during abnormal insertion;
fig. 4 is a schematic structural diagram of a circuit board according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of the circuit board of FIG. 4 during normal plugging;
FIG. 6 is a schematic structural diagram of the circuit board of FIG. 4 during abnormal insertion;
fig. 7 is a second schematic structural diagram of a circuit board according to an embodiment of the invention;
fig. 8 is a third schematic structural diagram of a circuit board according to an embodiment of the present invention;
FIG. 9 is a fourth schematic view illustrating a structure of a circuit board according to an embodiment of the present invention;
fig. 10 is a fifth schematic view illustrating a structure of a circuit board according to an embodiment of the invention;
fig. 11 is a sixth schematic view of a circuit board according to an embodiment of the present invention;
fig. 12 is a front view of a display device according to an embodiment of the present invention;
fig. 13 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are for illustrative purposes only and do not represent true scale.
It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
Fig. 1 is a schematic diagram of a pin portion of two circuit boards plugged into each other in the prior art. After the circuit board 1 and the circuit board 2 are normally plugged, the circuit board 1 transmits corresponding signals to the circuit board 2 through the pins. As shown in fig. 1, the circuit board 1 may include a plurality of power signal output pins vcc, input/output pins i/o, a ground pin gnd, and the like; accordingly, each pin in the circuit board 2 corresponds to each pin in the circuit board 1 one by one, and the circuit board 2 includes a corresponding power signal receiving pin vcc ', an input/output pin i/o ', and a ground pin gnd '. Fig. 2 shows a schematic diagram of normal plugging between a circuit board 1 and a circuit board 2, where the circuit board 1 can normally output signals to pins of the circuit board 2, the circuit board 1 transmits a power signal to a power signal receiving pin vcc' of the circuit board 2 through the power signal output pin vcc, and a logic circuit in the circuit board 2 can be normally started after receiving the normally transmitted power signal. If the circuit board 1 is not normally plugged with the circuit board 2, and the pin is misaligned, as shown in fig. 3, at this time, one power signal output pin vcc of the circuit board 1 is connected to the power signal receiving pin vcc 'of the circuit board 2, and the other power signal output pin vcc of the circuit board 1 is connected to the input/output pin i/o' of the circuit board 2, then when the circuit board 1 normally outputs a power signal to the circuit board 2, the input terminal vin of the logic circuit of the circuit board 2 can still normally receive the input signal (the input signal is the power signal transmitted by the circuit board 1), the logic circuit normally outputs a signal and transmits the signal to the input/output pin i/o 'of the circuit board 2 through the output terminal out of the logic circuit, but because the input/output pin i/o' of the circuit board 2 is connected to the power signal output pin vcc of the circuit board 1 at this time, when the logic circuit outputs a logic low level, a loop is formed between the logic circuit and the two vcc pins of the circuit board 1, which causes a short circuit of the logic circuit and damages the logic circuit. Besides, if the input/output pin i/o of the wiring board 1 is misaligned to the ground pin gnd' of the wiring board 2, the wiring board 1 may be damaged when the wiring board 1 outputs a logic high level.
In view of this, embodiments of the present invention provide a circuit board for preventing the above-mentioned short circuit and other phenomena caused by abnormal insertion between circuit boards, and protecting each device of the circuit board from being damaged.
The circuit board and the display device provided by the embodiment of the invention are combined with the accompanying drawings. The thicknesses and shapes of the respective components in the drawings do not reflect the true scale of the display device, and are merely intended to schematically illustrate the present invention.
As shown in fig. 4, the circuit board provided in the embodiment of the present invention includes: a first wiring board 100 and a second wiring board 200; the first wiring board 100 includes: the data processing module 11, the power management module 12, a first idle pin NC1 and a second idle pin NC 2; the second wiring board 200 includes: a third idle pin NC1 'and a fourth idle pin NC 2'. The first empty pin NC1 corresponds to the third empty pin NC1 ', and the second empty pin NC2 corresponds to the fourth empty pin NC 2'.
The data processing module 11 comprises a first signal output terminal OUT1, the first signal output terminal OUT1 is connected with a first idle pin NC 1; the power management module 12 comprises an enable signal control end EN, and the enable signal control end EN is connected with a second idle pin NC 2; the third vacant pin NC1 'is shorted to the fourth vacant pin NC 2'.
The vacant pins are pins that are not connected with any signal line originally, and usually, the vacant pins are subjected to floating processing. In the embodiment of the invention, the original vacant pins are utilized to carry out special connection treatment, so that the circuit damage caused by abnormal plugging of the two circuit boards can be avoided. Normally, the enable signal control terminal EN of the power management module is configured to receive an enable signal sent by the data processing module 11, and output a power signal under the control of the enable signal. In the embodiment of the present invention, the first signal output terminal OUT1 of the data processing module 11 is connected to the first idle pin NC1, the third idle pin NC1 'and the fourth idle pin NC 2' are shorted, and the enable signal control terminal EN of the power management module 12 is connected to the second idle pin NC 2. The data processing module 11 may output an enable signal for controlling the power management module 12 through the first signal output pin OUT 1.
When the first circuit board 100 and the second circuit board 200 are normally plugged, as shown in fig. 5, the first idle pin NC1 and the third idle pin NC1 'are connected, the second idle pin NC2 and the fourth idle pin NC 2' are connected, the data processing module 11 may output an enable signal for controlling the power management module to the first idle pin NC1 through the first signal output terminal OUT1, the enable signal is transmitted to the third idle pin NC1 'of the second circuit board 200 through the first idle pin NC1, is transmitted to the fourth idle pin NC 2' through the third idle pin NC1 ', is transmitted back to the second idle pin NC2 of the first circuit board 100 through the fourth idle pin NC 2', and finally the enable signal may be transmitted to the enable signal control terminal EN of the power management module 12 through the second idle pin NC2, the power management module 12 may normally output a power signal (vcc) under the control of the enable signal, the power signal is normally transmitted to the corresponding pin of the second circuit board 200.
When the first circuit board 100 and the second circuit board 200 are not normally plugged, and the pin plugging is deviated, as shown in fig. 6, the first vacant pin NC1 of the first circuit board 100 is not normally connected to the third vacant pin NC1 'of the second circuit board 200, but is connected to the fourth vacant pin NC 2' of the second circuit board 200. At this time, if the data processing module 11 normally outputs the enable signal to the first idle pin NC1, the enable signal is transmitted to the fourth idle pin NC2 ' of the second circuit board 200 through the first idle pin NC1, and then transmitted to the third idle pin NC1 ' through the fourth idle pin NC2 ', the second circuit board 200 cannot transmit the enable signal back to the second idle pin NC2 of the first circuit board 100, and the power management module 12 cannot output the power signal, so that the circuit damage caused by the fact that the power signal is still output under the abnormal plugging condition of the first circuit board 100 and the second circuit board 200 can be avoided.
In practical applications, since the voltage of the power signals output by the first circuit board 100 is generally relatively high, when the pins are inserted in a staggered manner, the power signals are transmitted to the staggered pins of the second circuit board 200, which is likely to cause circuit damage. The first circuit board 100 may output a plurality of power signals, and accordingly, the first circuit board 100 may include a plurality of power signal output pins for outputting various power signals, and correspondingly, the second circuit board 200 further includes power signal receiving pins corresponding to the power signal output pins one to one.
For these different kinds of power signals, they can be output by different power management modules respectively. In order to avoid the damage of all power signals to the circuit, in the embodiment of the present invention, the special connection processing between the power management module and the vacant pin may be performed for each power management module, so as to avoid the circuit damage caused by the power signals transmitted to the staggered pin.
Specifically, as shown in fig. 4, the first wiring board 100 may include: the power signal output pin VCC, the second circuit board 200 may include: a power signal receiving pin VCC' corresponding to the power signal output pin VCC. The power management module 12 in the first circuit board may include: and a second signal output terminal OUT2, the second signal output terminal OUT2 being connected to the power supply signal output pin VCC. When the first circuit board 100 and the second circuit board 200 are normally plugged, as shown in fig. 5, the power management module 12 can normally receive the enable signal output by the data processing module 11, so that the power signal (VCC) is output from the second signal output terminal OUT2 under the control of the enable signal, and the power signal (VCC) can be transmitted to the power signal receiving pin VCC' of the second circuit board 200 through the power signal output pin VCC. When the first circuit board 100 and the second circuit board 200 are misaligned, the power management module 12 cannot normally receive the enable signal output by the data processing module 11, and therefore cannot output the power signal, thereby preventing the circuit from being damaged due to the power signal being transmitted to the misaligned pin.
In a specific implementation, as shown in fig. 7, the first circuit board 100 may include a plurality of power management modules, and accordingly, the first circuit board 100 is provided with power signal output pins corresponding to the power management modules one to one, and the second signal output end of each power management module is connected to the corresponding power signal output pin. Taking the structure shown in fig. 7 as an example, the first circuit board 100 includes three power management modules 12a, 12b, and 12c, and the first circuit board is provided with three power signal output pins V _ a, V _ b, and V _ c corresponding to the three power management modules; the second signal output end OUT2_ a of the power management module 12a is connected to the power signal output pin V _ a, the second signal output end OUT2_ b of the power management module 12b is connected to the power signal output pin V _ b, and the second signal output end OUT2_ c of the power management module 12c is connected to the power signal output pin V _ c.
Further, the data processing module 11 of the first circuit board 100 may further include three signal output terminals OUT1_ a, OUT1_ b, and OUT1_ c outputting the enable signals to the three power management modules, respectively. And simultaneously, two vacant pins are reserved on the first circuit board and the second circuit board for each power management module respectively. Specifically, the signal output terminal OUT1_ a of the data processing module 11 is connected to the idle pin NC1_ a, and the enable signal control terminal EN _ a of the power management module 12a is connected to the idle pin NC2_ a; the two vacant pins NC1_ a 'and NC2_ a' on the second wiring board corresponding to the vacant pins NC1_ a and NC2_ a, respectively, are shorted. The signal output end OUT1_ b of the data processing module 11 is connected with a null pin NC1_ b, and the enable signal control end EN _ b of the power management module 12b is connected with a null pin NC2_ b; the two vacant pins NC1_ b 'and NC2_ b' on the second wiring board, which correspond to the vacant pins NC1_ b and NC2_ b, respectively, are shorted. The signal output end OUT1_ c of the data processing module 11 is connected with a null pin NC1_ c, and the enable signal control end EN _ c of the power management module 12c is connected with a null pin NC2_ c; the two vacant pins NC1_ c 'and NC2_ c' on the second wiring board, which correspond to the vacant pins NC1_ c and NC2_ c, respectively, are shorted.
Thus, under the condition that the first circuit board 100 and the second circuit board 200 are normally plugged, the enabling signals respectively output by the data processing module 11 to each power management module can be transmitted to the second circuit board by the first circuit board through the corresponding vacant pins, and then the enabling signals are transmitted back to the enabling signal control end of the corresponding power management module by the second circuit board, so that each power management module can output power signals under the control of the corresponding enabling signals, and the power signals are transmitted to the power signal receiving pins corresponding to the second circuit board through each power signal output pin. When the first circuit board 100 and the second circuit board 200 are inserted and dislocated, the power management module can be prevented from outputting power signals, thereby protecting the circuit.
In specific implementation, as shown in fig. 8, the power management module 12 further includes: a third signal output terminal OUT3, the third signal output terminal OUT3 being for transmitting a ground signal; accordingly, the first wiring board 100 further includes: a ground pin GND connected to the third signal output terminal OUT 3; the second wiring board 200 further includes: and a ground signal receiving pin GND' corresponding to the ground pin GND. In practical applications, the circuit board is provided with more than one ground pin, and in order to protect the safety of the circuit, the circuit board is usually provided with a plurality of ground pins, and each ground pin GND of the first circuit board 100 needs to correspond to a receiving signal pin GND' of the second circuit board 200, so that the circuit can be grounded when the two circuit boards are normally plugged. The number of the ground pins in the circuit board is set according to the actual circuit design, and specific values are not limited herein.
Further, as shown in fig. 9, the second wiring board 200 further includes: the circuit is used for indicating whether the circuit is plugged into a normal light emitting diode 21, the positive electrode of the light emitting diode 21 is connected with a power supply signal receiving pin VCC ', and the negative electrode of the light emitting diode 21 is connected with a grounding signal receiving pin GND'. When the first circuit board 100 and the second circuit board 200 are normally plugged, the power signal output pin VCC of the first circuit board 100 can normally output a power signal, and then the power signal receiving pin VCC ' of the second circuit board 200 can receive the power signal, and a loop is formed between the power signal receiving pin VCC ', the light emitting diode 21 and the ground signal receiving pin GND ', and can drive the light emitting diode 21 to light up to indicate that the first circuit board 100 and the second circuit board 200 are normally plugged. When the first circuit board 100 and the second circuit board 200 are abnormally plugged, the power management module 12 cannot output the power signal to the power signal output pin VCC, and then the power signal reception pin VCC' of the second circuit board 200 cannot receive the power signal, so that the loop where the light emitting diode 21 is located has no current, and the light emitting diode 21 does not emit light, thereby indicating the abnormal plugging between the first circuit board 100 and the second circuit board 200.
In specific implementation, when the circuit board provided by the embodiment of the invention is connected with the display module, various signals for displaying images can be provided for the display module. The display module can be a liquid crystal display module and also can be an organic light emitting diode display module. When the liquid crystal display module is adopted, the circuit board can also provide signals for the backlight module of the liquid crystal display module. In this case, the circuit board includes a plurality of power signal output pins, which may include: an image signal output pin and a backlight signal output pin; the image signal output pin transmits a power supply signal for image display, and the backlight signal output pin transmits a backlight power supply signal. Correspondingly, the power management module corresponding to each of the power signal output pins may include: the display power supply management module corresponds to the image signal output pins one by one, and the backlight power supply management module corresponds to the signal output pins one by one.
The circuit board provided by the embodiment of the invention can be connected with a display screen, and provides driving signals for a display module and a backlight module in the display screen, so that the display of the display screen is controlled. In general, the driving voltages of the image display signal and the backlight signal are different, and therefore, corresponding power management modules need to be respectively arranged, each of the power management modules may include an enable signal control terminal, so that the power signal is externally output under the control of the enable signal, the communication signal is output by the data processing module, and the communication signal has different time sequences, and the power management module may output the power signal when the enable signal is a high-level signal in general; when the enable signal is a low level signal, the power management module does not output the power signal. Just because the power supply signal can be output under the control of the enable signal, the circuit connection mode provided by the embodiment of the invention can avoid the circuit damage caused by the fact that the power supply signal is not output to the staggered pin of the second circuit board when the power supply signal is inserted and staggered.
Further, as shown in fig. 10 and 11, the power management module 12 further includes: a signal input terminal VIN. The power management module 12 may receive a power signal through the signal input terminal VIN, receive an enable signal through the enable signal control terminal EN, and output the power signal to the outside through the second signal output terminal under the control of the enable signal; the power signal output by the second signal output end and the power signal received by the signal input end are the same power signal, and whether the power signal is output outwards is determined through the control of the enable signal.
In one implementation, as shown in fig. 10, a power signal may be provided by the data processing module 11 to the power management module 12. At this time, the data processing module 11 further includes: and a fourth signal output terminal OUT4, the fourth signal output terminal OUT4 being connected to the signal input terminal VIN of the power management module. When the data processing module 11 is used to provide various power signals to the power management modules 12, it is necessary to ensure that the data processing module 11 has high processing capability, and not only can output control signals, but also can output power signals. When a data processing module with high integration level is adopted to provide various signals, the volume of the whole machine can be reduced, and the unified control of the signals is facilitated.
In another implementable manner, the power signal may be provided to the power management module 12 by a separate other processing module. As shown in fig. 11, the first wiring board 11 further includes: a power signal conversion module 13; the signal output end OUT of the power signal conversion module 13 is connected to the signal input end VIN of the power management module 12. In the embodiment of the present invention, the data processing module 11 is used to output the control signal, and the power signal conversion module 13 is used to output the power signal. The power signal conversion module 13 can convert the standard voltage provided by the power supply into power signals of various voltages required by the display screen, and the independent power signal conversion module 13 is specially used for outputting the power signals of various voltages, so that the load of the data processing module 11 can be relatively reduced, and the control signals and the power signals are managed separately.
In practical applications, the data processing module 11 and the power signal conversion module 13 may be both processing chips. The printed circuit board can be used as a support for electronic components, and the first circuit board 100 is required to be integrated with a processing chip, so that the printed circuit board can be generally used and can be manufactured by using a mature electronic printing technology. The second circuit board 200 is usually connected to a logic circuit, and may be a printed circuit board or a flexible circuit board. The printed circuit board can be bent and is generally smaller in size, so that a flexible circuit board can be used at a link position where repeated flexing and some small parts are required. In the embodiment of the present invention, the second circuit board 200 may be used to connect signal lines of the display screen, and in order to not occupy the front display area of the display screen and make the display screen have a higher screen occupation ratio, the second circuit board 200 may be bent to the back of the display screen to connect with the first circuit board 100 by using a flexible circuit board. The first circuit board may be a motherboard of the display screen, or may also be a connector for connecting the motherboard, which is not limited herein.
It should be noted that, in the above drawings provided in the embodiments of the present invention, only some pins of the first circuit board and the second circuit board are illustrated, and the connection relationship of other pins is the same as that in the prior art, and is not described herein again. The number of pins of the first circuit board and the second circuit board is the same, and a standard 24-pin or a standard 42-pin gold finger connector can be adopted, which is not limited herein.
Based on the same inventive concept, an embodiment of the present invention further provides a display panel, and a front view of the display panel provided by the embodiment of the present invention is shown in fig. 12, and the display panel may include a display screen 300 for displaying images, and a circuit board (not shown in the figure) located on the back of the display screen. Fig. 13 shows the connection relationship between the display screen and the circuit board, the signal lines of the display screen 300 can be connected to the pins of the second circuit board 200, and after the first circuit board 100 and the second circuit board are successfully plugged, the control signals, the data signals and the like can be transmitted to the display screen 300 through the second circuit board 200 to drive the display screen to display images.
In a specific implementation, the display device may be a liquid crystal display device, and may also be an organic light emitting diode display device. When the display device is a liquid crystal display device, the second circuit board 200 is respectively connected with a display module and a backlight module in the display screen; when the display device is an organic light emitting diode display device, the second circuit board 200 is directly connected to the display module without a backlight module.
The circuit board and the display device provided by the embodiment of the invention comprise: a first circuit board and a second circuit board; the first circuit board includes: the power supply comprises a data processing module, a power supply management module, a first vacant pin and a second vacant pin; the second circuit board includes: a third vacant pin and a fourth vacant pin; the first vacant pin corresponds to a third vacant pin, and the second vacant pin corresponds to a fourth vacant pin; the data processing module comprises a first signal output end, and the first signal output end is connected with the first vacant pin; the power supply management module comprises an enabling signal control end, and the enabling signal control end is connected with the second vacant pin; the third vacant pin is in short circuit with the fourth vacant pin. Under the condition that the first circuit board and the second circuit board are normally plugged, the enabling signals output by the data processing module can be transmitted to the second circuit board from the first circuit board through the corresponding vacant pins and then transmitted back to the enabling signal control end of the corresponding power management module by the second circuit board, so that each power management module can output power signals under the control of the corresponding enabling signals. And when the first circuit board and the second circuit board are in plugging dislocation, the power management module can be prevented from outputting power signals, so that the circuit is protected.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A circuit board, comprising: a first circuit board and a second circuit board;
the first circuit board includes: the power supply comprises a data processing module, a power supply management module, a first vacant pin and a second vacant pin; the second circuit board includes: a third vacant pin and a fourth vacant pin; wherein,
the first vacant pin corresponds to the third vacant pin, and the second vacant pin corresponds to the fourth vacant pin;
the data processing module comprises a first signal output end, and the first signal output end is connected with the first vacant pin;
the power supply management module comprises an enabling signal control end, and the enabling signal control end is connected with the second vacant pin;
and the third vacant pin is in short circuit with the fourth vacant pin.
2. The circuit board of claim 1, wherein the first circuit board further comprises: a plurality of power signal output pins; the second circuit board includes: a plurality of power signal receiving pins corresponding to the power signal output pins one to one;
the power management module further comprises: a second signal output terminal;
the number of the power supply management modules is equal to that of the power supply signal output pins, and each power supply management module corresponds to each power supply signal output pin one to one;
and the second signal output end of each power management module is connected with each corresponding power signal output pin.
3. The circuit board of claim 2, wherein the power management module further comprises: a third signal output terminal for transmitting a ground signal;
the first circuit board further includes: a ground pin; the second circuit board further includes: a ground signal receiving pin corresponding to the ground pin;
the third signal output end is connected with the grounding pin.
4. The circuit board of claim 3, wherein the second circuit board further comprises: and the positive electrode of the light-emitting diode is connected with one power signal receiving pin, and the negative electrode of the light-emitting diode is connected with the grounding signal receiving pin.
5. The circuit board of claim 2, wherein the power signal output pin comprises: an image signal output pin which transmits a power supply signal for image display;
the power management module includes: and the display power supply management module corresponds to the image signal output pins one to one.
6. The circuit board of claim 2, wherein the power signal output pin comprises: the backlight signal output pin transmits a backlight power supply signal;
the power management module includes: and the backlight power supply management module corresponds to the signal output pins one to one.
7. The circuit board of any one of claims 1-6, wherein the data processing module further comprises: a fourth signal output terminal; and the fourth signal output end is connected with the signal input end of the power management module.
8. The circuit board of any one of claims 1-6, wherein the first circuit board further comprises: a power signal conversion module;
and the signal output end of the power supply signal conversion module is connected with the signal input end of the power supply management module.
9. The circuit board of any one of claims 1-6, wherein the first circuit board is a printed circuit board.
10. The circuit board of any one of claims 1-5, wherein the second circuit board is a printed circuit board or a flexible circuit board.
11. A display device, comprising: the circuit board of any one of claims 1-10, and a display screen coupled to the circuit board.
12. The display device according to claim 11, wherein the display device is a liquid crystal display device or an organic light emitting diode display device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811600835.5A CN109496062B (en) | 2018-12-26 | 2018-12-26 | Circuit board and display device |
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| CN201811600835.5A CN109496062B (en) | 2018-12-26 | 2018-12-26 | Circuit board and display device |
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| CN109496062B CN109496062B (en) | 2020-09-18 |
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| CN113611258A (en) * | 2021-09-16 | 2021-11-05 | 福州京东方光电科技有限公司 | Driving member and display device |
| CN113990158A (en) * | 2021-11-16 | 2022-01-28 | 中国民航大学 | Building block type electricity counting experiment device |
| CN114243328A (en) * | 2022-02-24 | 2022-03-25 | 深圳市瀚强科技股份有限公司 | PCB (printed circuit board) plug-in circuit and power supply equipment |
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| CN109496062B (en) | 2020-09-18 |
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