CN108880551A - Motherboard circuit, display module and display device - Google Patents
Motherboard circuit, display module and display device Download PDFInfo
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- CN108880551A CN108880551A CN201810710159.0A CN201810710159A CN108880551A CN 108880551 A CN108880551 A CN 108880551A CN 201810710159 A CN201810710159 A CN 201810710159A CN 108880551 A CN108880551 A CN 108880551A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/34—Analogue value compared with reference values
- H03M1/38—Analogue value compared with reference values sequentially only, e.g. successive approximation type
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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
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
This disclosure relates to which a kind of motherboard circuit, display module and display device, belong to electronic and electrical field.Motherboard circuit includes：Show that connectivity port, display connectivity port include a mould group recognition terminal；The analog-digital converter being connected with mould group recognition terminal is configured as being converted to the analog voltage in mould group recognition terminal into the digital signal including mould group mark；Wherein, display connectivity port with the mainboard connectivity port of display module for being connected, to receive the analog voltage from display module based on the connection between mould group recognition terminal and mainboard connectivity port identification signal terminal.Display module includes：Mainboard connectivity port, mainboard connectivity port include an id signal terminal；The electric pressure converter being connected with id signal terminal is configured as providing analog voltage corresponding with the mould group of display module mark to id signal terminal.The disclosure can support the identification between greater number of identification information based on lesser amount of hardware circuit.
Description
Technical field
This disclosure relates to electronic and electrical field, in particular to a kind of motherboard circuit, display module and display device.
Background technique
On the motherboard circuit of each electronic product, corresponding interface circuit usually can be all set identify connected it is hard
The identification information (ID) of part, such as model, supplier, date of manufacture etc..It is related for display module this kind product
Two terminals (PIN) can be reserved in the display connectivity port of motherboard circuit in technology, to be on each terminal by detecting
High voltage, low-voltage or high-impedance state realize the differentiation between different display modules.However, with display module class number
Increase and the lightening technological trend of electronic product, above-mentioned hardware identification mode be far from satisfying actual application and needed
It asks.
Summary of the invention
The disclosure provides a kind of motherboard circuit, display module and display device, can be based on lesser amount of hardware circuit
Support the identification between greater number of identification information.
In a first aspect, present disclose provides a kind of motherboard circuit, the motherboard circuit includes：
Show that connectivity port, the display connectivity port include a mould group recognition terminal；
The analog-digital converter being connected with the mould group recognition terminal, the analog-digital converter are configured as knowing the mould group
Analog voltage on other terminal is converted to the digital signal including mould group mark；
Wherein, the display connectivity port with the mainboard connectivity port of display module for being connected, to be based on the mould group
Connection between recognition terminal and the mainboard connectivity port identification signal terminal receives the institute from the display module
State analog voltage.
In one possible implementation, the analog-digital converter includes the position code converting unit of at least two-stage, arbitrarily
Institute's rheme code converting unit of adjacent two-stage is connected with each other；Wherein,
Institute's rheme code converting unit of every level-one is both configured to：It is greater than the position code threshold value of the same level in the input voltage of the same level
When voltage, the output bit code of the same level is set to 1, and the input voltage of described the same level is subtracted to the position code threshold voltage of described the same level
Obtained difference is supplied to institute's rheme code converting unit of next stage as the input voltage of next stage；Wherein, the institute of the first order
The input voltage of rheme code converting unit is the analog voltage, the position code threshold value electricity of the position code converting unit of at least two-stage
The voltage value of pressure successively decreases step by step；
Institute's rheme code converting unit of any level in addition to afterbody is both configured to：It is small in the input voltage of the same level
When the code threshold voltage of the position of the same level, the output bit code of the same level is set to 0, and using the input voltage of described the same level as next stage
Input voltage be supplied to institute's rheme code converting unit of next stage.
In one possible implementation, institute's rheme code converting unit of every level-one includes input terminal and position code output
End, institute's rheme code converting unit of any level in addition to afterbody includes voltage output end,
The input terminal of institute's rheme code converting unit of the first order is connected with the mould group recognition terminal, in addition to the first order
The voltage output end of institute's rheme code converting unit of the input terminal and upper level of institute's rheme code converting unit of any level is connected.
In one possible implementation, institute's rheme code converting unit of every level-one includes differential amplifier, described
The normal phase input end of differential amplifier connects the input terminal of the same level, and the inverting input terminal of the differential amplifier connects the same level
Institute's rheme code threshold voltage, the output end of the differential amplifier connects institute's rheme code output end of the same level；
Institute's rheme code converting unit of any level in addition to afterbody includes transistor and subtracter, the crystal
The grid of pipe connects institute's rheme code output end of the same level, and one in the source electrode and drain electrode of the transistor connects the described of the same level
Position code threshold voltage, another connects the first input end of the subtracter, and the second input terminal of the subtracter connects the same level
The input terminal, the output end of the subtracter connects the voltage output end of the same level；Wherein, the transistor is configured
Unlatching when to be 1 output bit code at grid, the subtracter are configured as inputting the voltage of the second input end and first
The difference between voltage at end is supplied to output end.
In one possible implementation, the analog-digital converter includes n grades of position code converting unit, and the n is positive
Integer；The analog voltage is generated and the partial pressure to reference voltage, the analog voltage set voltage value as (k*m)/
One in (4n), the k is any positive integer less than or equal to 4n, and the m is the voltage value of the reference voltage；
For being less than or equal to any positive integer i of n, the position code threshold voltage of institute's rheme code converting unit of i-stage
Reference voltage value is (m*2n-i)/(4n), the voltage value of each institute's rheme code threshold voltage is respectively less than its reference voltage value.
In one possible implementation, the analog-digital converter further includes decoding unit, and the decoding unit includes
At least two input terminals, institute's rheme code converting unit of every level-one are separately connected an input terminal of the decoding unit,
The decoding unit is configured as that preset carry meter will be converted to from the signal of the position of at least two-stage code converting unit
Numeral system.
In one possible implementation, institute's rheme code converting unit of every level-one includes position code output end, described
The quantity of input terminal and position described in the analog-digital converter code quantity of converting unit are identical, each input terminal connection with
Its corresponding institute's rheme code output end.
Second aspect, the disclosure additionally provide a kind of display module, and the display module includes：
Mainboard connectivity port, the mainboard connectivity port include an id signal terminal；
The electric pressure converter being connected with the id signal terminal, the electric pressure converter are configured as believing to the mark
Number terminal provides analog voltage corresponding with the mould group of display module mark；
Wherein, the mainboard connectivity port is used to connect the display connectivity port of motherboard circuit, to be believed based on the mark
The connection between mould group recognition terminal in number terminal and the display connectivity port, by described with display module mould group
It identifies corresponding analog voltage and is transferred to the motherboard circuit.
In one possible implementation, the electric pressure converter includes variable resistance, and the first of the variable resistance
Fixing end connects reference voltage, and the second fixing end of the variable resistance connects common end, and the movable end of the variable resistance connects
Connect the id signal terminal.
The third aspect, the disclosure additionally provide a kind of display device, and the display device includes：The master of any one of the above
Plate circuit, and/or, the display module of any one of the above.
As shown from the above technical solution, the disclosure can be based on the company between mould group recognition terminal and id signal terminal
It connects, the mould group mark of display module is transmitted in the form of analog voltage, is supported arbitrarily so as to be based only upon a hardware circuit
Identification between the mould group mark of quantity, facilitates the quantity for reducing hardware terminal and hardware transport line, increases identification information
Maximum can recognize quantity.
Detailed description of the invention
In order to illustrate more clearly of the technical solution in the embodiment of the present disclosure, will make below to required in embodiment description
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present disclosure, these
The reasonable variation of attached drawing also all covers in the protection scope of the disclosure.
Fig. 1 is the connection schematic diagram of the motherboard circuit that an embodiment of the present disclosure provides and display module；
Fig. 2 is the structural block diagram for the motherboard circuit that an embodiment of the present disclosure provides；
Fig. 3 is the circuit diagram of the position code converting unit in the motherboard circuit that an embodiment of the present disclosure provides；
Fig. 4 is the circuit diagram of the electric pressure converter in the display module that an embodiment of the present disclosure provides；
Fig. 5 is a kind of structural schematic diagram of display device in an embodiment of the present disclosure.
Specific embodiment
To keep the purposes, technical schemes and advantages of the disclosure clearer, below in conjunction with attached drawing to disclosure embodiment party
Formula is described in further detail.Obviously, described embodiment is a part of this disclosure embodiment, rather than whole realities
Apply example.Based on described embodiment of the disclosure, those of ordinary skill in the art are without creative work under the premise of institute
The every other embodiment obtained belongs to the range of disclosure protection.Unless otherwise defined, the technical term that the disclosure uses
Or scientific term should be the ordinary meaning that the personage in disclosure fields with general technical ability is understood.In the disclosure
" first ", " second " and the similar word used is not offered as any sequence, quantity or importance, and is used only to area
Divide different component parts." comprising " or similar word, which mean to occur element or object before the word, to be covered and appears in
The element of the word presented hereinafter perhaps object and its equivalent and be not excluded for other elements or object." connection " or " connected "
It is not limited to physics or mechanical connection etc. similar word, but may include electrical connection, and the connection can
To be direct or indirect.
Fig. 1 is the connection schematic diagram of the motherboard circuit that an embodiment of the present disclosure provides and display module.Referring to Fig. 1, institute
Stating motherboard circuit 10 includes display connectivity port 11 and analog-digital converter 12, and display module 20 includes mainboard connectivity port 21 and electricity
Pressure converter 22.In one example, motherboard circuit 10 and display module 20 can be connected by display connectivity port 11 and mainboard
The connection connect between port 21 forms connection relationship, based on the connection relationship may be implemented motherboard circuit 10 and display module 20 it
Between information exchange and collaborative work, such as motherboard circuit 10 can based on the connection relationship to display module 20 send display number
It is believed that number, so that display module 20 carries out the display of corresponding picture.
Referring to Fig. 1, the display connectivity port 11 includes a mould group recognition terminal 111, and mainboard connectivity port 21 includes
One id signal terminal 211.When showing that connectivity port 11 and mainboard connectivity port 21 are connected with each other, mould group recognition terminal
111 are also connected with each other with id signal terminal 211.In display module 20, the voltage being connected with id signal terminal 211 is converted
Device 22 is configured as providing analog voltage corresponding with the mould group of display module 20 mark to the id signal terminal 211.
10 in motherboard circuit, the analog-digital converter 12 being connected with mould group recognition terminal 111 is configured as the mould group recognition terminal
Analog voltage on 111 is converted to the digital signal including mould group mark.In this way, in display connectivity port 11 and mainboard connecting pin
When mouth 21 is connected with each other, analog voltage corresponding with the mould group of display module 20 mark can be based on mould group recognition terminal 111
Connection between id signal terminal 211 is transmitted to motherboard circuit 10 from display module 20, so that motherboard circuit can
It is converted to the digital signal including mould group mark to what the analog voltage received carried out by analog-digital converter 12, that is, is realized
Identification of the motherboard circuit 10 to the mould group mark of display module 20.
In one example, voltage value is set as 1.3V with mould group mark " 03 " corresponding analog voltage, thus mould group
The display module 20 for being identified as " 03 " can provide electricity to id signal terminal 211 by electric pressure converter 22 after powering on
Pressure value is the analog voltage of 1.3V.When 10 display connectivity port 11 in a motherboard circuit and the mainboard of the display module 20 connect
When connecing port 21 and being connected, analog voltage which is 1.3V can based on group recognition terminal 111 and id signal terminal 211 it
Between connection be transmitted to the input terminal of analog-digital converter 12.The analog-digital converter 12 is in advance according to mould group mark and analog voltage
Between corresponding relationship configured internal analog-to-digital conversion mode so that the analog-digital converter 12 is in receiving voltage value
Can be obtained when analog voltage in the range of 1.1V~1.4V include mould group mark " 03 " digital signal.In this way, working as voltage
When the analog voltage (1.7V is output voltage) that value is 1.7V is transferred to the input terminal of analog-digital converter 12, probably due to transmission line
The electricresistance effect on road becomes the analog voltage of 1.65V, so that analog-digital converter 12 can be converted to the analog voltage of the 1.65V
Including mould group mark " 03 " digital signal, that is, realize above-mentioned mould group be identified as " 03 " display module 20 mould group mark
Identification.
In one example, several individual voltage ranges can be set to correspond to different mould group marks (any two
The intersection of a voltage range is empty set), and chosen in each voltage range and identify corresponding analog voltage with each mould group
Voltage value is set, so that the analog voltage for the setting voltage value that electric pressure converter 22 exports can be converted by analog-digital converter 12
For corresponding mould group mark.It should be understood that can be realized in a certain range on the basis of a hardware circuit accordingly
Identification between any number of mould group mark.For example, 30 maximums can be divided into 0~3V with transmission quality signal-based
Value differs the voltage range of 0.1V with minimum value, so as to could support up the identification between 30 mould group marks.
In a comparative examples, mould group mark is realized by two terminals between display module 20 and motherboard circuit 10
Identification：Display module 20 can be identified based on the mould group of itself by two terminals be set to respectively a kind of signal condition (such as by its
In first terminal be set to high-impedance state, Second terminal therein is set to low level state), so that motherboard circuit 10 can pass through
It detects the signal condition identification at two terminals and the mould group mark of display module 20 occurs.In this way, since each terminal is ok
With one in three kinds of signal conditions such as high level state, low level state and high-impedance state, therefore the comparative examples can
Identification quantity (i.e. the maximum of identification information can the amount of identification) between the identification information of support is totally 9 kinds of 3*3.
By comparing as can be seen that the quantity of hardware circuit used in the embodiment of the present disclosure is more compared with comparative examples
Few (every hardware circuit all includes a terminal and corresponding connecting line), and the knowledge between the mould group mark that can be realized
Other quantity is it is also apparent that can break through 9 kinds of limitation.As it can be seen that the embodiment of the present disclosure can be based on mould group recognition terminal and id signal
Connection between terminal transmits the mould group mark of display module, in the form of analog voltage so as to be based only upon a hardware
Route supports the identification between any number of mould group mark.Herein on basis, the embodiment of the present disclosure is by that can reduce institute
The quantity of the hardware circuit needed, thus help to reduce the quantity of hardware terminal and hardware transport line；The embodiment of the present disclosure by
In can support the identification between any more mould groups mark, thus phase can also be passed through for other kinds of identification information
The maximum for increasing identification information with principle can recognize quantity.Certainly, the technical solution obtained based on the embodiment of the present disclosure can be same
When obtain above-mentioned both sides effect, can also only obtain the effect of wherein one side.
Fig. 2 is the structural block diagram for the motherboard circuit that an embodiment of the present disclosure provides.Referring to fig. 2, above-mentioned in the present embodiment
Analog-digital converter 12 includes 4 grades of position code converting unit 121 and a decoding unit 122, and wherein the position code conversion of the first order is single
Member 121 is connected with mould group recognition terminal 111, to receive the analog voltage V0 from display module 20；The position of arbitrary neighborhood two-stage
Code converting unit 121 is connected with each other, and the position code converting unit 121 of every level-one is separately connected an input terminal of decoding unit 122,
To export the bit that the mould group identifies to decoding unit 122 respectively.Decoding unit 122 can pass through four-ten six
Decode to 16 output end Y0, Y1 ..., an output logical one in Y15, to export with hexadecimal number letter
Number indicate the mould group mark, be achieved in the above-mentioned analog voltage V0 by mould group recognition terminal 111 and be converted to including mould
The function of the digital signal of group mark.
In one example, above-mentioned 4 grades of position code converting unit 121 can be by realizing analog voltage based on following configurations
The conversion that V0 is identified to the mould group indicated with binary digital signal：
The position code converting unit 121 of every level-one is both configured to：It is greater than the position code threshold value of the same level in the input voltage of the same level
When voltage, the output bit code of the same level is set to 1, and the difference that the position code threshold voltage that the input voltage of the same level subtracts the same level is obtained
Value is supplied to the position code converting unit 121 of next stage as the input voltage of next stage；Wherein, the position code converting unit of the first order
121 input voltage is the analog voltage V0, at least the voltage value of the position code threshold voltage of the position code converting unit 121 of two-stage
Successively decrease step by step.
The position code converting unit 121 of any level in addition to afterbody is both configured to：It is small in the input voltage of the same level
When the code threshold voltage of the position of the same level, the output bit code of the same level is set to 0, and using the input voltage of the same level as the defeated of next stage
Enter the position code converting unit 121 that voltage is supplied to next stage.
As an example, electric pressure converter 22 can be by base to the analog voltage that id signal terminal 211 provides
The partial pressure of quasi- voltage and generate, for example the setting voltage value of analog voltage is made to be derived from one in (k*m)/16, wherein k be less than
Any positive integer equal to 16, m are the voltage value (being set as 1.8V in this example) of benchmark voltage.Since k can be in 0 to 16
Any one, therefore the setting voltage value of analog voltage can have up to 17 kinds.Correspondingly, 4 grades of position code can be set to turn
Change unit 121 position code threshold voltage be respectively：0.88V, 0.44V, 0.22V and 0.11V.
For the situation of k=10, it is (10* that analog-digital converter 12 as shown in Figure 2, which can receive voltage value,
1.8)/16=1.125V analog voltage V0, thus：
The first order position code converting unit 121 can according to above-mentioned configuration by voltage value be 1.125V analog voltage V0 with
The position code threshold voltage 0.88V of the same level is compared, due to 1.125V>0.88V, thus the position code converting unit 121 of the first order
The output bit code of the same level is set to " 1 " (first binary digit of module marking), and by the input voltage 1.125V of the same level
The position obtained difference 0.245V of code threshold voltage 0.88V for subtracting the same level is supplied to the second level as the input voltage of next stage
Position code converting unit 121.
The second level position code converting unit 121 according to above-mentioned configuration by the position of the input voltage 0.245V of the same level and the same level code
Threshold voltage 0.44V is compared, due to 0.245V<0.44V, thus the position code converting unit 121 of the second level is by the defeated of the same level
Position code is set to " 0 " (second binary digit of module marking) out, and using the input voltage 0.245V of the same level as next stage
Input voltage be supplied to the third level position code converting unit 121.
The third level position code converting unit 121 according to above-mentioned configuration by the position of the input voltage 0.245V of the same level and the same level code
Threshold voltage 0.22V is compared, due to 0.245V>0.22V, thus the position code converting unit 121 of the third level is by the defeated of the same level
Position code is set to " 1 " (the third binary digit of module marking) out, and the input voltage 0.245V of the same level is subtracted the same level
The difference 0.025V that position code threshold voltage 0.22V is obtained is single as the position code conversion that the input voltage of next stage is supplied to the fourth stage
Member 121.
The fourth stage position code converting unit 121 according to above-mentioned configuration by the position of the input voltage 0.025V of the same level and the same level code
Threshold voltage 0.11V is compared, due to 0.025V<0.11V, thus the position code converting unit 121 of the fourth stage is by the defeated of the same level
Position code is set to " 0 " (second binary digit of module marking) out.Since the position code converting unit 121 of the fourth stage is last
The position code converting unit 121 of grade, therefore it does not need to provide input voltage for the position code converting unit 121 of next stage.
By the above process, voltage value is that the analog voltage V0 of 1.125V can be converted into 4 binary system shapes of " 1010 "
The module marking of formula, can be converted by decoding unit 122 at output end Y10 logical one represent 16 into
The module marking of form processed, i.e. electric pressure converter 22 are generated based on module marking " 10 " and set voltage value as the simulation of 1.125V
Voltage V0, and the analog-digital converter 12 for receiving analog voltage V0 is converted to analog voltage V0 with digital signal shape
The module marking " 10 " of formula.
For the situation of k=3, analog-digital converter 12 as shown in Figure 2 can receive voltage value be (3*1.8)/
16=0.3375V analog voltage V0, thus：
The analog voltage V0 that voltage value can be 0.3375V according to above-mentioned configuration by the position code converting unit 121 of the first order
It is compared with the position of the same level code threshold voltage 0.88V, due to 0.3375V<0.88V, thus the position code converting unit of the first order
121 are set to the output bit code of the same level " 0 " (first binary digit of module marking), and by the input voltage of the same level
0.3375V is supplied to the position code converting unit 121 of the second level as the input voltage of next stage.
The position code converting unit 121 of the second level is according to above-mentioned configuration by the input voltage 0.3375V of the same level and the position of the same level
Code threshold voltage 0.44V is compared, due to 0.3375V<0.44V, thus the position code converting unit 121 of the second level is by the same level
Output bit code is set to " 0 " (second binary digit of module marking), and using the input voltage 0.3375V of the same level as next
The input voltage of grade is supplied to the position code converting unit 121 of the third level.
The position code converting unit 121 of the third level is according to above-mentioned configuration by the input voltage 0.3375V of the same level and the position of the same level
Code threshold voltage 0.22V is compared, due to 0.3375V>0.22V, thus the position code converting unit 121 of the third level is by the same level
Output bit code is set to " 1 " (the third binary digit of module marking), and the input voltage 0.3375V of the same level is subtracted the same level
The position obtained difference 0.1175V of code threshold voltage 0.22V the position code turn of the fourth stage is supplied to as the input voltage of next stage
Change unit 121.
The position code converting unit 121 of the fourth stage is according to above-mentioned configuration by the input voltage 0.1175V of the same level and the position of the same level
Code threshold voltage 0.11V is compared, due to 0.1175V>0.11V, thus the position code converting unit 121 of the fourth stage is by the same level
Output bit code is set to " 1 " (second binary digit of module marking).Since the position code converting unit 121 of the fourth stage is last
The position code converting unit 121 of level-one, therefore it does not need to provide input voltage for the position code converting unit 121 of next stage.
By the above process, voltage value is that the analog voltage V0 of 0.3375V can be converted into 4 binary system shapes of " 0011 "
The module marking of formula can be converted into the hexadecimal represented with the logical one at output end Y3 by decoding unit 122
The module marking of form, i.e. electric pressure converter 22 are generated based on module marking " 3 " sets voltage value as the simulation of 0.3375V electricity
V0 is pressed, and the analog-digital converter 12 for receiving analog voltage V0 is converted to analog voltage V0 with digital signal form
Module marking " 3 ".
Based on above-mentioned example as can be seen that above-mentioned 4 grades of position code converting unit 121 can be by being realized based on following configurations
The conversion that analog voltage V0 is identified to the mould group indicated with 4 binary digital signals.It should be understood that can be based on upper
It states example and obtains n grades of position code converting unit 121 and realize analog voltage V0 to the mould group indicated with n binary digital signals
The technical solution of the conversion of mark.At this point, analog-digital converter 12 includes n grades of position code converting unit 121, wherein the position of every level-one
Code converting unit 121 is both configured to：When the input voltage of the same level is greater than the position code threshold voltage of the same level, by the output of the same level
Position code is set to 1, and the difference that the position code threshold voltage that the input voltage of the same level subtracts the same level is obtained is as the input of next stage
Voltage is supplied to the position code converting unit 121 of next stage；Wherein, the input voltage of the position code converting unit 121 of the first order is institute
Analog voltage V0 is stated, the voltage value of at least position code threshold voltage of the position code converting unit 121 of two-stage successively decreases step by step.Moreover, removing
The position code converting unit 121 of any level other than afterbody is both configured to：It is less than the position of the same level in the input voltage of the same level
When code threshold voltage, the output bit code of the same level is set to 0, and provide the input voltage of the same level as the input voltage of next stage
To the position code converting unit 121 of next stage.Herein basis on, can make the setting voltage value of analog voltage be derived from (k*m)/
One in (4n), wherein k is any positive integer less than or equal to 4n, and (i is any just whole less than or equal to n to i-stage
Number) position code converting unit 121 position code threshold voltage can based on reference voltage value be (m*2n-i)/(4n) it is configured, out
The considerations of in terms of the transfer admittance, the voltage value of each code threshold voltage should be less than its reference voltage value, and when implementation can
To choose voltage value that one is slightly less than reference voltage value as position yard threshold voltage.For example, for m=1.8V, n=4, i=1
Situation, reference voltage value be (m*2n-i)/(4n)=0.9V, above-mentioned 0.88V can be chosen as based on the reference voltage value
The position code threshold voltage of the position code converting unit 121 of level-one.And for m=1.8V, the situation of n=4, i=3, reference voltage value
For (m*2n-i)/(4n)=0.225V, position code conversion of the above-mentioned 0.22V as the third level can be chosen based on the reference voltage value
The position code threshold voltage of unit 121.
Fig. 3 is the circuit diagram of the position code converting unit in the motherboard circuit that an embodiment of the present disclosure provides.Referring to
Fig. 3, in the analog-digital converter 12 including n grades of positions code converting unit 121, the position of i-stage (i be any positive integer) less than n
Code converting unit 121 includes input terminal Ii, position code output end Di and voltage output end Vi, further includes differential amplifier OPi, crystal
Pipe Qi and subtracter Mi.In addition, the position code converting unit 121 of afterbody includes input terminal Ii and position in analog-digital converter 12
Code output end Di further includes differential amplifier OPi (i.e. after removing voltage output end Vi, transistor Qi and subtracter Mi in Fig. 3
Remaining part).In analog-digital converter 12, the input terminal and mould group recognition terminal 111 of the position code converting unit 121 of the first order
It is connected, the input terminal Ii of the position code converting unit 121 of any level in addition to the first order and the position code converting unit 121 of upper level
Voltage output end Vi-1 be connected.
As an example, referring to fig. 2, in the analog-digital converter 12 including 4 grades of position code converting unit 121, the 1st grade
Position code converting unit 121 includes input terminal I1, position code output end D1 and voltage output end V1, the 2nd grade of position code converting unit 121
Including input terminal I2, position code output end D2 and voltage output end V2, the position code converting unit 121 of 3rd level includes input terminal I3, position
Code output end D3 and voltage output end V3, the 4th grade (afterbody) of position code converting unit 121 include that input terminal I4 and position code are defeated
Outlet D4.Herein on basis, the input terminal I1 of the 1st grade of position code converting unit 121 is connected with mould group recognition terminal 111 to connect
Analog voltage V0 is received, the voltage of the position code converting unit 121 of the input terminal I2 and upper level of the 2nd level code converting unit 121 is defeated
Outlet V1 is connected, the voltage output of the position code converting unit 121 of the input terminal I3 and upper level of 3rd level position code converting unit 121
V2 is held to be connected, the voltage output end of the position code converting unit 121 of the input terminal I4 and upper level of the 4th level code converting unit 121
V3 is connected.
It is differential to put in the position code converting unit 121 of i-stage (i is any positive integer less than or equal to n) referring to Fig. 3
The normal phase input end of big device OPi connects the input terminal Ii of the same level, and the inverting input terminal of differential amplifier OPi connects the position code of the same level
Threshold voltage Vbi, the output end of differential amplifier OPi connect the position code output end Di of the same level.Based on this, in the input terminal of the same level
When voltage (input voltage of the same level) at Ii is greater than the position code threshold voltage Vbi of the same level, the difference of differential amplifier OPi output
Voltage is high level voltage, position code output end Di can be disposed as logical one (the output bit code of the same level is set to 1)；?
When voltage (input voltage of the same level) at the input terminal Ii of the same level is less than the position code threshold voltage Vbi of the same level, differential amplifier
The difference voltage of OPi output is low level voltage, position code output end Di can be disposed as logical zero (i.e. by the output of the same level
0) position code is set to.
Referring to Fig. 3, in the position code converting unit 121 of i-stage (i is any positive integer less than n), the grid of transistor Qi
Pole connects the position code output end Di of the same level, the position code threshold voltage Vbi of connection the same level in the source electrode and drain electrode of transistor,
The first input end IN1 of another connection subtracter Mi, the second input terminal IN2 of subtracter Mi connect the input terminal Ii of the same level,
The output end OUT of subtracter Mi connects the voltage output end Vi of the same level.Wherein, transistor Qi be configured as at grid for 1 it is defeated
Out position code when open, subtracter Mi be configured as by the second input terminal IN2 at voltage and first input end IN1 at voltage it
Between difference be supplied to output end OUT.It should be noted that its source electrode can be set according to the difference of transistor concrete type
Possessed connection relationship is distinguished with drain electrode, to match with the sense of current for flowing through transistor；There is source electrode in transistor
When with drain electrode symmetrical structure, source electrode and drain electrode can be considered as two electrodes for not making to distinguish especially.In one example, crystal
Pipe Q1 may, for example, be N-type MOSFET (Metal Oxide Semiconductor Field Effect Transistor,
Metal Oxide Semiconductor Field Effect Transistor) device, thus：Voltage (the input electricity of the same level at the input terminal Ii of the same level
Pressure) when being greater than the output high level voltage of the position code threshold voltage Vbi of the same level, differential amplifier OPi, transistor Q1 is opened, and is made
The position code threshold voltage Vbi for obtaining the same level is supplied to the first input end IN1 of subtracter Mi, and thus subtracter Mi acts on lower output end
Will be exported at OUT voltage (input voltage of the same level) at the input terminal Ii of the same level and the same level position code threshold voltage Vbi it
Between difference.And the voltage (input voltage of the same level) at the input terminal Ii of the same level be less than the same level position code threshold voltage Vbi,
When the output low level voltage of differential amplifier OPi, transistor Q1 is closed, and the first input end IN1 of subtracter Mi is zero electricity
Pressure, thus subtracter Mi acts on voltage (the input electricity of the same level at the input terminal Ii that will export the same level at lower output end OUT
Pressure).
It can be seen that be based on foregoing circuit structure, may be implemented rheme code converting unit 121 realize analog voltage V0 to
The configuration being based on when the conversion of the mould group mark indicated with binary digital signal.
It should be understood that by taking the decoding unit 122 that the line decoding circuit of four line -16 illustrated in fig. 2 is realized as an example,
The decoding unit 122 can also according to inputted mould group mark position counting system and required output mould group mark into
Signal from the position of at least two-stage code converting unit 121 is converted to the function of preset carry counting system to realize by position counting system
Energy.In one example, in the above-mentioned analog-digital converter 12 including n grades of position code converting unit 121, n grades of position code conversion is single
Member 121 can export the mould group mark that n binary digital signals indicate, thus the decoding unit in the analog-digital converter 12
122 can use line -2 nnThe decoding circuit of line is realized.For any i-stage in above-mentioned n grades of position code converting unit 121
Position code converting unit 121 includes the situation of position code output end Di, and the quantity of the input terminal of decoding unit 12 can turn with position code
The quantity for changing unit 121 is identical (such as being n), and each input terminal connects corresponding position code output end in sequence
Di (connection type shown in Figure 2 can be considered as a kind of example).
Fig. 4 is the circuit diagram of the electric pressure converter in the display module that an embodiment of the present disclosure provides.Referring to fig. 4, originally
The electric pressure converter 22 of embodiment includes variable resistance R1, the first fixing end (variable resistance R1 in Fig. 4 of the variable resistance R1
Upper end) connection benchmark voltage vcc, the variable resistance R1 the second fixing end (lower end of variable resistance R1 in Fig. 4) connection
Public terminal GND, the movable end (right end with the arrow of variable resistance R1 in Fig. 4) of the variable resistance R1 connect the mark letter
Number terminal 211 is to provide the analog voltage V0.Based on this, can be obtained by manually adjusting variable resistance R1 with institute's phase
The analog voltage V0 of the voltage value of prestige.Compared with above-mentioned comparative examples, the present embodiment haves no need to change the circuit in display module
Structure, and only need to adjust variable resistance R1 can set display module mould group mark, can save as different moulds
Group mark separately designs the process of circuit structure, and the mould group mark of display module after dispatching from the factory can be adjusted neatly
It is whole.
Based on same inventive concept, one embodiment of the disclosure provides a kind of display device, which includes
The display module of several any one of the above and/or the motherboard circuit of any one of the above.It should be noted that institute herein
It includes any one of the above electric pressure converter and any one mark that the display module stated, which can be any one in display device,
The structure of signal port can be used, for example, the circuit module of installation on a display screen, also may, for example, be including display screen
It can also be, for example, the mould group including display panel and touch panel with the display panel of circuit module.Master described herein
It includes any one of the above analog-digital converter and any one display connecting pin that plate circuit, which can be in any one electronic product,
Mouthful circuit structure, such as cell phone mainboard circuit, computer motherboard circuit, TV motherboard circuit, main board for notebook computer circuit,
Main board of tablet computer circuit etc..Based on this, the display device is either include display module without including motherboard circuit
Display unit in electronic product is also possible to include motherboard circuit without the main board portion in the electronic product including display module
Point, the combination that both can also be, such as mobile phone, tablet computer, television set, display, laptop, Digital Frame, lead
Navigate any electronic products having a display function such as instrument.
As an example, Fig. 5 is a kind of structural schematic diagram of display device in an embodiment of the present disclosure.Display dress
In setting, as the sub-pixel Px on the display screen of display module including several array arrangements, the circuit part of display screen passes through
Id signal port is connected with the display connectivity port of the motherboard circuit of the display device, so that the display device can be based on mould
The mould group mark of display module is transmitted in connection between group recognition terminal and id signal terminal in the form of analog voltage, can
Be based only upon a hardware circuit support any number of mould group identify between identification, help to reduce hardware terminal and hardware
The quantity of transmission line, the maximum for increasing identification information can recognize quantity.
The foregoing is merely the preferred embodiments of the disclosure, not to limit the disclosure, all spirit in the disclosure and
Within principle, any modification, equivalent replacement, improvement and so on be should be included within the protection scope of the disclosure.
Claims (10)
1. a kind of motherboard circuit, which is characterized in that the motherboard circuit includes：
Show that connectivity port, the display connectivity port include a mould group recognition terminal；
The analog-digital converter being connected with the mould group recognition terminal, the analog-digital converter are configured as the mould group identifying end
Analog voltage on son is converted to the digital signal including mould group mark；
Wherein, the display connectivity port with the mainboard connectivity port of display module for being connected, to be identified based on the mould group
Connection between terminal and the mainboard connectivity port identification signal terminal receives the mould from the display module
Quasi- voltage.
2. motherboard circuit according to claim 1, which is characterized in that the analog-digital converter includes the position code of at least two-stage
Institute's rheme code converting unit of converting unit, arbitrary neighborhood two-stage is connected with each other；Wherein,
Institute's rheme code converting unit of every level-one is both configured to：It is greater than the position code threshold voltage of the same level in the input voltage of the same level
When, the output bit code of the same level is set to 1, and the position code threshold voltage that the input voltage of described the same level subtracts described the same level is obtained
Difference institute's rheme code converting unit of next stage is supplied to as the input voltage of next stage；Wherein, institute's rheme of the first order
The input voltage of code converting unit is the analog voltage, the position code threshold voltage of the position code converting unit of at least two-stage
Voltage value successively decreases step by step；
Institute's rheme code converting unit of any level in addition to afterbody is both configured to：It is less than this in the input voltage of the same level
When the position code threshold voltage of grade, the output bit code of the same level is set to 0, and using the input voltage of described the same level as the defeated of next stage
Enter institute's rheme code converting unit that voltage is supplied to next stage.
3. motherboard circuit according to claim 2, which is characterized in that institute's rheme code converting unit of every level-one includes defeated
Entering end and position code output end, institute's rheme code converting unit of any level in addition to afterbody includes voltage output end,
The input terminal of institute's rheme code converting unit of the first order is connected with the mould group recognition terminal, any in addition to the first order
The input terminal of institute's rheme code converting unit of grade is connected with the voltage output end of institute's rheme code converting unit of upper level.
4. motherboard circuit according to claim 3, which is characterized in that institute's rheme code converting unit of every level-one includes difference
Dynamic amplifier, the normal phase input end of the differential amplifier connect the input terminal of the same level, the reverse phase of the differential amplifier
Input terminal connects institute's rheme code threshold voltage of the same level, and the output end of the differential amplifier connects institute's rheme code output of the same level
End；
Institute's rheme code converting unit of any level in addition to afterbody includes transistor and subtracter, the transistor
Grid connects institute's rheme code output end of the same level, institute's rheme code of connection the same level in the source electrode and drain electrode of the transistor
Threshold voltage, another connects the first input end of the subtracter, and the second input terminal of the subtracter connects the institute of the same level
Input terminal is stated, the output end of the subtracter connects the voltage output end of the same level；Wherein, the transistor is configured as grid
It is opened when being 1 output bit code at pole, the subtracter is configured as will be at the voltage of the second input end and first input end
Voltage between difference be supplied to output end.
5. motherboard circuit according to any one of claim 2 to 4, which is characterized in that the analog-digital converter includes n grades
Position code converting unit, the n be positive integer；The analog voltage is generated and the partial pressure to reference voltage, the simulation
Voltage sets voltage value as one in (k*m)/(4n), and the k is any positive integer less than or equal to 4n, and the m is
The voltage value of the reference voltage；
For being less than or equal to any positive integer i of n, the benchmark of the position code threshold voltage of institute's rheme code converting unit of i-stage
Voltage value is (m*2n-i)/(4n), the voltage value of each institute's rheme code threshold voltage is respectively less than its reference voltage value.
6. motherboard circuit according to any one of claim 2 to 4, which is characterized in that the analog-digital converter further includes
Decoding unit, the decoding unit include at least two input terminals, and institute's rheme code converting unit of every level-one is separately connected described
One input terminal of decoding unit, the decoding unit is configured as will be from the position of at least two-stage code converting unit
Signal be converted to preset carry counting system system.
7. motherboard circuit according to claim 6, which is characterized in that institute's rheme code converting unit of every level-one includes position
Code output end, the quantity of the input terminal is identical as the code quantity of converting unit of position described in the analog-digital converter, Mei Gesuo
It states input terminal and connects corresponding institute's rheme code output end.
8. a kind of display module, which is characterized in that the display module includes：
Mainboard connectivity port, the mainboard connectivity port include an id signal terminal；
The electric pressure converter being connected with the id signal terminal, the electric pressure converter are configured as to the id signal end
Son provides analog voltage corresponding with the mould group of display module mark；
Wherein, the mainboard connectivity port is used to connect the display connectivity port of motherboard circuit, to be based on the id signal end
Connection between the sub mould group recognition terminal with the display connectivity port, the mould group with the display module is identified
Corresponding analog voltage is transferred to the motherboard circuit.
9. the display module according to claim, which is characterized in that the electric pressure converter includes variable resistance, it is described can
First fixing end of power transformation resistance connects reference voltage, and the second fixing end of the variable resistance connects common end, it is described can power transformation
The movable end of resistance connects the id signal terminal.
10. a kind of display device, which is characterized in that the display device includes：As described in any one of claims 1 to 7
Motherboard circuit, and/or, display module as claimed in claim 8 or 9.
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| CN201810710159.0A CN108880551B (en) | 2018-07-02 | 2018-07-02 | Mainboard circuit, display module assembly and display device |
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| CN201810710159.0A CN108880551B (en) | 2018-07-02 | 2018-07-02 | Mainboard circuit, display module assembly and display device |
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| CN112530379A (en) * | 2019-09-18 | 2021-03-19 | 咸阳彩虹光电科技有限公司 | Display device and interface type selection method thereof |
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| CN108880551B (en) | 2022-05-24 |
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