CN114148170B - Automobile L-shaped central control screen and working method thereof - Google Patents
Automobile L-shaped central control screen and working method thereof Download PDFInfo
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- CN114148170B CN114148170B CN202111564221.8A CN202111564221A CN114148170B CN 114148170 B CN114148170 B CN 114148170B CN 202111564221 A CN202111564221 A CN 202111564221A CN 114148170 B CN114148170 B CN 114148170B
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000011521 glass Substances 0.000 claims abstract description 7
- 239000003990 capacitor Substances 0.000 claims description 97
- 238000005070 sampling Methods 0.000 claims description 65
- 238000005286 illumination Methods 0.000 claims description 57
- MKGHDZIEKZPBCZ-ULQPCXBYSA-N methyl (2s,3s,4r,5r,6r)-4,5,6-trihydroxy-3-methoxyoxane-2-carboxylate Chemical compound CO[C@H]1[C@H](O)[C@@H](O)[C@H](O)O[C@@H]1C(=O)OC MKGHDZIEKZPBCZ-ULQPCXBYSA-N 0.000 claims description 33
- 239000003381 stabilizer Substances 0.000 claims description 32
- 230000005540 biological transmission Effects 0.000 claims description 30
- 230000008054 signal transmission Effects 0.000 claims description 18
- 101100499944 Arabidopsis thaliana POL2A gene Proteins 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 13
- 208000004350 Strabismus Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/21—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor using visual output, e.g. blinking lights or matrix displays
- B60K35/22—Display screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/20—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor
- B60K35/29—Instruments characterised by the way in which information is handled, e.g. showing information on plural displays or prioritising information according to driving conditions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
- B60K35/60—Instruments characterised by their location or relative disposition in or on vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/18—Information management
- B60K2360/195—Blocking or enabling display functions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/40—Hardware adaptations for dashboards or instruments
- B60K2360/42—Circuit board features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K2360/00—Indexing scheme associated with groups B60K35/00 or B60K37/00 relating to details of instruments or dashboards
- B60K2360/40—Hardware adaptations for dashboards or instruments
- B60K2360/46—Electrical connections
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides an automobile L-shaped central control screen and a working method thereof, wherein the automobile L-shaped central control screen comprises a display driving circuit and an instrument shell, a screen shell is vertically arranged on the front side of the instrument shell, the front side of the screen shell is opened, and a glass cover plate is arranged on the front side of the screen shell; the rear side of the screen shell is transversely provided with a circuit shell, a display driving circuit is integrated on the circuit board, positioning ribs are arranged in the circuit shell, and the screen shell is communicated with the circuit shell; the parts, which are close to the rear side, on the left side and the right side of the circuit shell are inwards concaved, guide ribs which extend forwards and backwards are convexly arranged on the parts, which are inwards concaved, on the left side and the right side of the circuit shell, and each guide rib is provided with a limit protrusion which is arranged at intervals forwards and backwards; the back side of the circuit shell is provided with buckles at left and right intervals, and the back side of the circuit shell is also provided with a net mouth and an RF connector; the top of the circuit shell is detachably connected with a back plate, and a row of fixed mounting holes are formed on the back plate near the front side. The display screen can be stably fixed, and the periphery of the display screen is prevented from being damaged due to extrusion.
Description
Technical Field
The invention relates to the technical field of automobile instruments, in particular to an L-shaped central control screen of an automobile and a working method thereof.
Background
The common automobile display instrument is characterized in that a display screen is arranged at the bottom of a shading cylinder, and the display screen is fixed by arranging buckles around the shading cylinder. Under long-time sun irradiation, the shading barrel is easy to loose, so that abnormal sound is generated on an automobile display instrument, and driving comfort is affected. Meanwhile, as the automobile instrument is fixed around, when the automobile instrument board is extruded, the display screen is easy to extrude, so that the display screen is damaged.
Disclosure of Invention
The invention particularly and innovatively provides an L-shaped central control screen of an automobile and a working method thereof, which can stably fix the display screen and avoid the damage of the periphery of the display screen caused by extrusion.
In order to achieve the above purpose, the invention provides an automobile L-shaped central control screen, which comprises a display driving circuit and an instrument shell, wherein the front side of the instrument shell is vertically provided with a screen shell for installing a TFT display screen, and the front side of the screen shell is opened and is provided with a glass cover plate;
the rear side of the screen shell is transversely provided with a circuit shell for installing a circuit board, a display driving circuit is integrated on the circuit board, a circle of positioning ribs for circumferentially positioning the circuit board are arranged in the circuit shell, and the screen shell is communicated with the circuit shell;
The circuit shell is characterized in that the parts, close to the rear side, of the left side and the right side of the circuit shell are concavely arranged inwards to form a convex shape with a large front end and a small rear end, the concaved part of the circuit shell is used for being inserted into an automobile instrument panel, the insertion depth is limited by a larger front end of the circuit shell, guide ribs extending forwards and backwards are convexly arranged on the concaved parts of the left side and the right side of the circuit shell, and limiting protrusions which are arranged at intervals forwards and backwards are arranged on each guide rib; two buckles used for being clamped on an automobile instrument board are arranged at left and right intervals on the rear side of the circuit shell, and a net opening and an RF connector are further arranged on the rear side of the circuit shell; the top of circuit casing can be dismantled and be connected with the backplate, be equipped with a row of fixed mounting hole near the front side on the backplate, the plate body part that is located around the fixed mounting hole on the backplate squints downwards, forms the fixed column, the bottom of fixed column offsets with the bottom of circuit casing to fix the backplate on circuit casing through set screw.
In the scheme, the method comprises the following steps: and the backboard is concavely provided with a yielding groove with an axis extending left and right.
In the scheme, the method comprises the following steps: and a yielding pit for yielding the TFT display screen wiring row is arranged at the inner side of the screen shell near the bottom.
In the scheme, the method comprises the following steps: and a plurality of threaded mounting holes are formed in the positioning ribs.
In the scheme, the method comprises the following steps: decorative strips are arranged on the left side and the right side of the glass cover plate.
In the scheme, the method comprises the following steps: the display driving circuit comprises an MCU, a deserializer U1, a TFT display screen and an LED illumination driver U7, wherein the power supply driving output end of the MCU decoder is connected with the driving signal input end of a decoder power supply circuit, and the driving signal output end of the decoder power supply circuit is connected with the power supply input end and the IO voltage input end of the deserializer U1; the MCUTFT power supply driving output end is connected with the TFT power supply circuit driving signal input end, the MCU screen enabling signal output end is connected with the TFT display screen enabling circuit screen enabling signal input end, the MCUI2C bus transmission end is connected with the LED illumination driver U7I2C bus transmission end, the MCUTFT backlight driving signal output end is connected with the deserializer U1TFT backlight driving signal input end and the LED illumination driver U7TFT backlight driving signal input end, the MCUTFT backlight PWM signal output end is connected with the deserializer U1TFT backlight PWM signal input end and the LED illumination driver U7TFT backlight PWM signal input end, and the MCUTFT backlight fault signal output end is connected with the LED illumination driver U7TFT backlight fault signal input end;
The MCU backlight I2C bus signal transmission end is connected with the LED illumination driver U7 backlight I2C bus signal transmission end;
the power supply voltage sampling circuit is characterized by further comprising a power supply and a power supply voltage sampling circuit, wherein a sampling driving input end of the power supply voltage sampling circuit is connected with a power supply voltage sampling driving output end of the MCU, a sampling end of the power supply voltage sampling circuit is connected with a sampling end of the power supply, and a sampling signal output end of the power supply voltage sampling circuit is connected with a power supply voltage sampling signal input end of the MCU.
In the scheme, the method comprises the following steps: the voltage stabilizing circuit comprises a diode D3, the positive electrode of the diode D3 is connected with a power supply end, the negative electrode of the diode D3 is connected with a voltage input end VIN of a voltage stabilizer U3 and an enabling end EN of the voltage stabilizer U3, a power output end VOUT of the voltage stabilizer U3 is connected with one end of a capacitor C59 and one end of a resistor R65, the other end of the capacitor C59 is connected with a power ground, one end of the resistor R65 is a 3.3VMCU power supply end, and the other end of the resistor R65 is connected with a 3.3V switch power supply end; the voltage input end VIN of the voltage stabilizer U3 and the enabling end of the voltage stabilizer U3 are connected with one end of a capacitor C60 and one end of a capacitor C61, the other end of the capacitor C60 and the other end of the capacitor C61 are connected with power ground, and the power ground end GND of the voltage stabilizer U3 is connected with power ground;
the enable input end EN of the voltage stabilizer U4 is connected with one end of a resistor R74, one end of a resistor R73 and one end of a resistor R72, the other end of the resistor R74 is connected with a MCU1.2V switch power supply driving output end PTD0, the other end of the resistor R72 is connected with the power ground, the voltage input end VIN of the voltage stabilizer U4 is connected with the other end of the resistor R72, one end of a capacitor C69 and a 3.3V switch power supply end, one end of the capacitor C69 is connected with the power ground, the voltage output end VOUT of the voltage stabilizer U4 outputs 1.2V voltage, one end of the resistor R75 is connected with one end of the capacitor C68, the other end of the resistor R75 is connected with one end of the resistor R76 and the voltage feedback end ADJ of the voltage stabilizer U4, and the other end of the resistor R76 and the other end of the capacitor C68 are both connected with the power ground; the power ground end GND of the voltage stabilizer U4 is connected with power ground;
The decoder power supply circuit comprises a resistor R136, wherein one end of the resistor R136 is connected with an MCU decoder power supply drive output end PTA6, the other end of the resistor R136 is connected with one end of a resistor R135 and a base electrode of a triode Q8, the other end of the resistor R135 and an emitter electrode of the triode Q8 are both connected with power supply ground, a collector electrode of the triode Q8 is connected with one end of a resistor R138, the other end of the resistor R138 is connected with one end of a resistor R137, one end of a capacitor C98 and a grid electrode of a MOS tube Q7, a source electrode of the MOS tube Q7 is connected with one end of a resistor R139, the other end of the resistor R137, the other end of the capacitor C98 and a 3.3V switch power supply end, a drain electrode of the MOS tube Q7 is connected with the other end of the resistor R139, one end of the resistor R134, one end of the inductor L3 and one end of the inductor L8, the other end of the resistor R134 is connected with power supply ground, the other end of the inductor L3 is connected with a power supply input end of a deserializer U1, and the other end of the inductor L8 is connected with an IO voltage input end of the deserializer U1;
the TFT power supply circuit comprises a resistor R77, wherein one end of the resistor R77 is connected with an MCUTFT power supply driving output end PTD4, the other end of the resistor R77 is connected with one end of a resistor R78 and a base electrode of a triode Q4, the other end of the resistor R78 and an emitting electrode of the triode Q4 are both connected with power supply ground, a collector electrode of the triode Q4 is connected with one end of a resistor R79, the other end of the resistor R79 is connected with one end of a resistor R80, one end of a capacitor C45 and a grid electrode of a MOS tube Q5, a source electrode of the MOS tube Q5 is connected with the other end of the resistor R80, the other end of the capacitor C45 and a 3.3V switch power supply end, a drain electrode of the MOS tube Q5 is connected with one end of a resistor R81 and the 3.3VTFT power supply end, and the other end of the resistor R81 is connected with the power supply ground.
In the scheme, the method comprises the following steps: the power supply circuit comprises one end of a capacitor C64 connected with the first end of the wiring row J3, the positive electrode of a diode D5 and the negative electrode of a diode D4, wherein the positive electrode of the diode D5 is a voltage sampling end of a power supply, the other end of the capacitor C64 is connected with one end of a capacitor C65, the other end of the capacitor C65 and the positive electrode of the diode D4 are both connected with a power supply ground, the negative electrode of the diode D5 is connected with one end of an inductor L9 and one end of a capacitor C62, the other end of the capacitor C62 is connected with the power supply ground, the other end of the inductor L9 is the power supply end of the power supply, the other end of the inductor is connected with one end of a capacitor C63, and the other end of the capacitor C63 is connected with the power supply ground;
the TFT display screen enabling circuit comprises one end of a capacitor C66 and the positive electrode of a diode D6 which are connected with the fifth end of a wiring row J3, the fifth end of the wiring row J3 is connected with the screen wake-up signal output end of an automobile, the other end of the capacitor C66 is connected with the power ground, the negative electrode of the diode D6 is connected with the screen wake-up input end of a buck converter U2 and one end of a resistor R56, one end of a resistor R59 is connected with one end of a resistor R55, the other end of the resistor R55 is connected with the power ground, the other end of the resistor R56 is connected with one end of a resistor R57 and the base of a diode Q1, the other end of the resistor R57 and the emitter of the diode Q1 are both connected with the power ground, one end of a resistor R58 is connected with one end of a resistor R133, the other end of the resistor R133 is connected with the base of the diode Q6, the other end of the resistor R58 is connected with the emitter of the diode Q6 and the power supply end of a 3.3VMCU, the collector of the diode Q6 is connected with one end of a resistor R131, and the other end of the resistor R131 is connected with the other end of the resistor R132; the other end of the resistor R132 is a screen enabling signal output end and is connected with an MCU screen enabling signal input end;
The other end of the resistor R59 is connected with one end of the resistor R60, the other end of the resistor R60 is connected with the power ground, the other end of the resistor R59 is a screen voltage sampling signal output end and is connected with an MCU screen voltage sampling signal input end.
In the scheme, the method comprises the following steps: the power supply voltage sampling circuit comprises a resistor R69 connected with an MCU power supply voltage sampling driving output end, wherein the other end of the resistor R69 is connected with one end of a resistor R70 and a base electrode of a triode Q3, an emitter electrode of the triode Q3 and the other end of the resistor R70 are both connected with power supply ground, a collector electrode of the triode Q3 is connected with one end of a resistor R66, the other end of the resistor R66 is connected with one end of the resistor R70 and a base electrode of the triode Q2, an emitter electrode of the triode Q2 is connected with the other end of the resistor R70 and a voltage sampling end of a power supply, a collector electrode of the triode Q2 is connected with one end of a resistor R67, the other end of the resistor R67 is connected with one end of a resistor R68 and the MCU power supply voltage sampling signal input end, and the other end of the resistor R68 is connected with the power supply ground;
the power bias end of the buck converter U2 is connected with one end of a resistor R52, the other end of the resistor R52 is connected with one end of a capacitor C48, the other end of the capacitor C48 is connected with the negative electrode of a diode D2, one end of a resistor R64 and the supervision switching end of the buck converter U2, the positive electrode of the diode D2 is connected with the power ground, the other end of the resistor R64 is connected with one end of a capacitor C57, and the other end of the capacitor C57 is connected with the power ground;
The supervision switching end of the buck converter U2 is connected with one end of an inductor L6, the other end of the inductor L6 is a 3.3V switch power supply end, the power input end of the buck converter U2 is connected with one end of a resistor R115, the other end of the resistor R115 is connected with the power supply end, the enabling signal input end of the buck converter U2 is connected with one end of a resistor R53, one end of a resistor R82 and the negative electrode of a switching diode D1, the first positive electrode of the switching diode D1 is connected with the other end of the resistor R82 and the MCU3.3V switch power supply enabling signal output end, the second positive electrode of the switching diode D1 is connected with one end of a resistor R54, and the other end of the resistor R54 is the screen awakening input end of the buck converter U2; the reverse input end of the buck converter U2 is connected with one end of a resistor R63 and one end of a resistor R61, the other end of the resistor R63 is connected with the power ground, the other end of the resistor R61 is connected with one end of a resistor R62, and the other end of the resistor R62 is connected with the other end of an inductor L6;
the first low-voltage signal positive electrode of the deserializer U1 is connected with the first output end of the filter L10, the first low-voltage signal negative electrode of the deserializer U1 is connected with the second output end of the filter L10, the first input end of the filter L10 is connected with one end of the protection diode ESD6 and the fourth end of the RF connector J4, the other end of the protection diode ESD6 is connected with the power ground, the second input end of the filter L10 is connected with one end of the protection diode ESD8 and the second end of the RF connector J4, and the other end of the protection diode ESD8 is connected with the power ground;
The second low-voltage signal positive electrode of the deserializer U1 is connected with the third output end of the filter L10, the second low-voltage signal negative electrode of the deserializer U1 is connected with the fourth output end of the filter L10, the third input end of the filter L10 is connected with one end of the protection diode ESD7 and the third end of the RF connector J4, the other end of the protection diode ESD7 is connected with the power ground, the fourth input end of the filter L10 is connected with one end of the protection diode ESD5 and the first end of the RF connector J4, and the other end of the protection diode ESD5 is connected with the power ground; the external equipment is connected through the deserializer U1;
the TFT display screen signal output end is also connected with the MCUTFT signal output end, the TFT display screen clock input end is also connected with the MCUTFT clock output end, the TFT display screen data transmission end is also connected with the MCUTFT data transmission end, the TFT display screen reset end is also connected with the MCUTFT reset end, and the TFT display screen reset end is connected with external adapting equipment through an MCU; the MCUTFT self-test starting output end is connected with the TFT display screen self-test starting input end, the MCUTFT fault signal input end is connected with the TFT display screen fault signal output end, and the MCUTFT passband cutoff frequency transmission end is connected with the TFT display screen passband cutoff frequency transmission; the MCU backlight sampling signal input end is connected with the TFT display screen backlight sampling signal output end,
The TFT display screen signal output end is also connected with the deserializer U1 screen signal output end, the TFT display screen clock input end is also connected with the deserializer U1 screen clock output end, the TFT display screen data transmission end is also connected with the deserializer U1 screen data transmission end, the TFT display screen reset end is also connected with the deserializer U1 screen reset end, and the TFT display screen reset end is connected with external adapting equipment through the deserializer U1; the pixel signal output end of the deserializer U1 is connected with the pixel signal input end of the TFT display screen, the illumination signal transmission end of the LED illumination driver U7 is connected with the illumination signal transmission end of the TFT display screen,
the TFT display screen signal output end is also connected with the wiring row J1 screen signal output end, the TFT display screen clock input end is also connected with the wiring row J1 screen clock output end, the TFT display screen data transmission end is also connected with the wiring row J1 screen data transmission end, the TFT display screen reset end is also connected with the wiring row J1 screen reset end, and the TFT display screen reset end is connected with external adapting equipment through the wiring row J1;
the voltage input end of the LED illumination driver U7 is connected with one end of a resistor R107, the other end of the resistor R107 is connected with the U7 power supply end and one end of an inductor L12, the other end of the inductor L12 is connected with the anode of a diode D8, the cathode of the diode D8 is connected with one end of a resistor R109 and one end of a resistor R86, the other end of the resistor R109 is connected with the backlight signal input end of the TFT display screen, the other end of the resistor R86 is connected with one end of a resistor R87, the other end of the resistor R87 is connected with one end of a resistor R88 and the overvoltage protection end of the LED illumination driver U7, and the other end of the resistor R88 is connected with the power ground;
The working voltage end of the LED illumination driver U7 is connected with one end of a resistor R106 and the cathode of a diode D9, the other end of the resistor R106 is connected with the anode of the diode D9 and one end of a capacitor C85, the other end of the capacitor C85 is connected with one end of a resistor R105 and one end of a capacitor C87, the other end of the resistor R105 and the other end of the capacitor C87 are both connected with the end of the LED illumination driver U7ADR, and the signal output end of the LED illumination driver U7 is connected with the signal input end of a wiring row J2 LED;
the MCU backlight I2C clock signal output end is connected with the LED illumination driver U7 backlight I2C clock signal input end, and the MCU backlight I2C data signal transmission end is connected with the LED illumination driver U7 backlight I2C data signal transmission end.
The invention also provides a working method of the L-shaped central control screen of the automobile, which comprises the following steps:
s1, after an automobile is electrified, a display instrument is in a standby state;
s2, triggering a screen awakening key of the automobile, transmitting a screen awakening signal of the automobile to the MCU through a wiring row J3, awakening the MCU, and outputting 3.3V voltage to supply power for the MCU through a buck converter U2;
s3, after the MCU is started, outputting a high level to the buck converter U2, and locking a pin of the buck converter U2 EN;
s4, the MCU receives detection signals of screen voltage sampling signals, and if the screen voltage accords with a set value, a TFT display screen, a deserializer and an LED illumination driver U7 are initialized;
S5, after the TFT display screen, the deserializer and the LED illumination driver U7 are initialized, the TFT display screen, the deserializer, the touch controller and the LED illumination driver U7 are started, and the display instrument displays image information and responds to touch operation of a user;
s6, continuously monitoring the power supply voltage, and transmitting a power supply voltage sampling signal to a power supply voltage sampling circuit by the MCU, wherein the voltage sampling circuit transmits the detected sampling data of the power supply voltage to the MCU;
and S7, when the display screen is required to be closed, triggering a screen sleep key of the automobile, transmitting a screen wake-up signal of the automobile to the MCU through the wiring row J3, sequentially closing the TFT display screen, the deserializer and the LED illumination driver U7, closing the output of the buck converter U2, entering a sleep mode, and waiting for the MCU to wake up again to enter a normal working mode.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows: the vertical TFT display that sets up of front side, the rear side transversely sets up the circuit casing, can insert the header board through the circuit board casing and fix, and the buckle that the rear end set up can the chucking, avoids not hard up, and the direction rib of setting can lead when inserting, still provides the effect of chucking simultaneously, further avoids not hard up. Most part of the circuit board shell is inserted into the automobile instrument, so that the supporting force to the TFT display screen can be met, and the installation stability is improved. The circuit housing and meter housing, which are in communication with each other, are capable of connecting wiring on the circuit board to the TFT display screen.
Drawings
FIG. 1 is an exploded view of the meter housing of the present invention;
FIG. 2 is a top view of the circuit housing of the present invention;
fig. 3 is a circuit diagram of the voltage regulator U3 of the present invention;
fig. 4 is a circuit diagram of the voltage regulator U4 of the present invention;
FIG. 5 is a circuit diagram of a decoder power supply circuit of the present invention;
fig. 6 is a circuit diagram of a TFT power supply circuit of the present invention;
FIG. 7 is a circuit diagram of a power supply circuit and a TFT display enable circuit of the invention;
FIG. 8 is a circuit diagram of a supply voltage sampling circuit of the present invention;
fig. 9 is a circuit diagram of the buck converter U2 of the present invention;
fig. 10 is a circuit diagram of the deserializer U1 of the present invention;
FIG. 11 is a circuit diagram of the wiring harness J2 of the present invention;
FIG. 12 is a circuit diagram of an LED lighting driver U7 of the present invention;
FIG. 13 is a circuit diagram of the MCU of the present invention;
fig. 14 is a circuit diagram of the inductor L3 and the inductor L8 of the present invention;
fig. 15 is a circuit diagram of the inductor L1, the inductor L2, the inductor L4, and the inductor L5 of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
As shown in fig. 1-2, an automotive L-shaped center control panel comprises a display driving circuit and an instrument housing 3, wherein a screen housing 3a for mounting a TFT display screen is vertically arranged on the front side of the instrument housing 3, the front side of the screen housing 3a is open, and a glass cover plate 1 is mounted. Decorative strips 2 are arranged on the left side and the right side of the glass cover plate 1. The inner side of the screen housing 3a is provided with a relief pit 3f for relieving the TFT wiring row at the bottom.
The rear side of the screen casing 3a is transversely provided with a circuit casing 3b for installing a circuit board 4, a display driving circuit is integrated on the circuit board 4, a circle of positioning ribs 3e for positioning the circuit board 4 circumferentially are arranged in the circuit casing 3b, and the screen casing 3a is communicated with the circuit casing 3 b.
The parts of the left side and the right side of the circuit shell 3b, which are close to the rear side, are concavely arranged to form a convex shape with a large front end and a small rear end, wherein the concavely arranged parts of the circuit shell 3b are used for being inserted into an automobile instrument panel, the insertion depth is limited by the larger front end of the circuit shell 3b, the concavely arranged parts of the left side and the right side of the circuit shell 3b are convexly provided with guide ribs 10 which extend forwards and backwards, each guide rib 10 is provided with limiting protrusions 9 which are arranged at intervals forwards and backwards, and each positioning rib 3e is provided with a plurality of threaded mounting holes. The rear side of the circuit housing 3b is provided with two buckles 8 used for being clamped on an automobile instrument board at left and right intervals, the rear side of the circuit housing 3b is further provided with a net mouth 7 and an RF connector J4, net mouth mounting holes 3d used for mounting the net mouth 7 and connector mounting holes 3c used for mounting the RF connector J4 are formed in the rear side of the circuit housing 3b, and the net mouth mounting holes 3d and the connector mounting holes 3c are located between the two buckles 8. The top of the circuit shell 3b is detachably connected with a back plate 5, a row of fixed mounting holes are formed on the back plate 5 near the front side, plate body parts, which are positioned around the fixed mounting holes, on the back plate 5 deflect downwards to form fixed columns 5a, the bottoms of the fixed columns 5a are propped against the bottoms of the circuit shell 3b, and the back plate 5 is fixed on the circuit shell 3b through fixing screws. The backboard 5 is concavely provided with a yielding groove 6 with an axis extending left and right.
As shown in fig. 3-15, the display driving circuit includes an MCUU6, a deserializer U1, a TFT display screen, and an LED lighting driver U7, where the power supply driving output end of the MCUU6 decoder is connected to the driving signal input end of the decoder power supply circuit, and the driving signal output end of the decoder power supply circuit is connected to the power supply input end and the IO voltage input end of the deserializer U1. The MCUU6TFT power supply driving output end is connected with the TFT power supply circuit driving signal input end, the MCUU6 screen enabling signal output end is connected with the TFT display screen enabling circuit screen enabling signal input end, the MCUU6I2C bus transmission end is connected with the LED illumination driver U7I2C bus transmission end, the MCUU6TFT backlight driving signal output end is connected with the deserializer U1TFT backlight driving signal input end and the LED illumination driver U7TFT backlight driving signal input end, the MCUU6TFT backlight PWM signal output end is connected with the deserializer U1TFT backlight PWM signal input end and the LED illumination driver U7TFT backlight PWM signal input end, and the MCUU6TFT backlight fault signal output end is connected with the LED illumination driver U7TFT backlight fault signal input end.
The MCUU6 backlight I2C bus signal transmission end is connected with the LED illumination driver U7 backlight I2C bus signal transmission end.
The power supply voltage sampling circuit is connected with the sampling end of the power supply, the sampling signal output end of the power supply voltage sampling circuit is connected with the sampling signal input end of the MCUU6 power supply voltage sampling signal.
In the scheme, the method comprises the following steps: the voltage stabilizing circuit comprises a diode D3, wherein the positive electrode of the diode D3 is connected with a power supply end, the negative electrode of the diode D3 is connected with a voltage input end VIN of the voltage stabilizer U3 and an enabling end EN of the voltage stabilizer U3, a power output end VOUT of the voltage stabilizer U3 is connected with one end of a capacitor C59 and one end of a resistor R65, the other end of the capacitor C59 is connected with a power ground, one end of the resistor R65 is a 3.3VMCU power supply end, and the other end of the resistor R65 is connected with a 3.3V switch power supply end. The voltage input end VIN of the voltage stabilizer U3 and the enabling end of the voltage stabilizer U3 are connected with one end of a capacitor C60 and one end of a capacitor C61, the other end of the capacitor C60 and the other end of the capacitor C61 are connected with power ground, and the power ground end GND of the voltage stabilizer U3 is connected with power ground.
The enable input end EN of the voltage stabilizer U4 is connected with one end of a resistor R74, one end of a resistor R73 and one end of a resistor R72, the other end of the resistor R74 is connected with a MCUU61.2V switch power supply driving output end PTD0, the other end of the resistor R72 is connected with the power ground, the voltage input end VIN of the voltage stabilizer U4 is connected with the other end of the resistor R72, one end of a capacitor C69 and the 3.3V switch power supply end, one end of the capacitor C69 is connected with the power ground, the voltage output end VOUT of the voltage stabilizer U4 outputs 1.2V, one end of the resistor R75 is connected with one end of the capacitor C68, the other end of the resistor R75 is connected with one end of the resistor R76 and the voltage feedback end ADJ of the voltage stabilizer U4, and the other end of the resistor R76 and the other end of the capacitor C68 are all connected with the power ground. The power ground GND of the voltage regulator U4 is connected to the power ground.
The decoder power supply circuit comprises a resistor R136, wherein one end of the resistor R136 is connected with a MCUU6 decoder power supply driving output end PTA6, the other end of the resistor R136 is connected with one end of a resistor R135 and the base electrode of a triode Q8, the other end of the resistor R135 and the emitting electrode of the triode Q8 are both connected with power supply ground, the collector electrode of the triode Q8 is connected with one end of the resistor R138, the other end of the resistor R138 is connected with one end of the resistor R137, one end of a capacitor C98 and the grid electrode of a MOS tube Q7, the source electrode of the MOS tube Q7 is connected with one end of the resistor R139, the other end of the resistor R137, the other end of the capacitor C98 and the power supply end of a 3.3V switch, the drain electrode of the MOS tube Q7 is connected with the other end of the resistor R139, one end of the resistor R134, one end of the inductor L3 and one end of the inductor L8, the other end of the resistor R134 is connected with the power supply ground, the other end of the inductor L3 is connected with the power supply input end of the deserializer U1, and the other end of the inductor L8 is connected with the input end of the deserializer IO voltage.
The TFT power supply circuit comprises a resistor R77, wherein one end of the resistor R77 is connected with an MCUU6TFT power supply driving output end PTD4, the other end of the resistor R77 is connected with one end of a resistor R78 and a base electrode of a triode Q4, the other end of the resistor R78 and an emitting electrode of the triode Q4 are both connected with power supply ground, a collector electrode of the triode Q4 is connected with one end of the resistor R79, the other end of the resistor R79 is connected with one end of the resistor R80, one end of a capacitor C45 and a grid electrode of a MOS tube Q5, a source electrode of the MOS tube Q5 is connected with the other end of the resistor R80, the other end of the capacitor C45 and a 3.3V switch power supply end, a drain electrode of the MOS tube Q5 is connected with one end of the resistor R81 and the 3.3VTFT power supply end, and the other end of the resistor R81 is connected with the power supply ground.
In the scheme, the method comprises the following steps: the power supply circuit comprises a capacitor C64 end connected with the first end of the wiring row J3, a diode D5 anode and a diode D4 cathode, wherein the diode D5 anode is a voltage sampling end of a power supply, the other end of the capacitor C64 is connected with a capacitor C65 end, the other end of the capacitor C65 and the diode D4 anode are both connected with a power supply ground, the diode D5 cathode is connected with an inductor L9 end and a capacitor C62 end, the other end of the capacitor C62 is connected with the power supply ground, the other end of the inductor L9 is a power supply end and is connected with one end of the capacitor C63, and the other end of the capacitor C63 is connected with the power supply ground.
The TFT display screen enabling circuit comprises one end of a capacitor C66 and the positive electrode of a diode D6, wherein the end of the capacitor C66 is connected with the fifth end of a wiring row J3, the fifth end of the wiring row J3 is connected with the screen wake-up signal output end of an automobile, the other end of the capacitor C66 is connected with the power supply ground, the negative electrode of the diode D6 is connected with the screen wake-up input end of a buck converter U2 and one end of a resistor R56, one end of a resistor R59 is connected with one end of a resistor R55, the other end of the resistor R55 is connected with the power supply ground, the other end of the resistor R56 is connected with one end of a resistor R57 and the base of a diode Q1, the other end of the resistor R57 and the emitter of the diode Q1 are both connected with the power supply ground, the collector of the diode Q1 is connected with one end of a resistor R58, one end of a resistor R133 and one end of a resistor R132, the other end of the resistor R133 is connected with the emitter of the diode Q6 and the power supply end of a 3.3VMCU, the collector of the diode Q6 is connected with one end of the resistor R131, and the other end of the resistor R131 is connected with the other end of the resistor R132. The other end of the resistor R132 is a screen enabling signal output end and is connected with the MCUU6 screen enabling signal input end.
The other end of the resistor R59 is connected with one end of the resistor R60, the other end of the resistor R60 is connected with the power ground, the other end of the resistor R59 is a screen voltage sampling signal output end and is connected with an MCUU6 screen voltage sampling signal input end.
In the scheme, the method comprises the following steps: the power supply voltage sampling circuit comprises a resistor R69 end connected with the MCUU6 power supply voltage sampling driving output end, a resistor R70 end connected with the other end of the resistor R69 and a triode Q3 base electrode, a triode Q3 emitter and a resistor R70 end are both connected with a power supply ground, a triode Q3 collector is connected with a resistor R66 end, a resistor R66 other end is connected with a resistor R70 end and a triode Q2 base electrode, a triode Q2 emitter is connected with a resistor R70 other end and a voltage sampling end of the power supply, a triode Q2 collector is connected with a resistor R67 end, a resistor R67 other end is connected with a resistor R68 end and the MCUU6 power supply voltage sampling signal input end, and a resistor R68 other end is connected with the power supply ground.
The power bias end of the buck converter U2 is connected with one end of a resistor R52, the other end of the resistor R52 is connected with one end of a capacitor C48, the other end of the capacitor C48 is connected with the cathode of a diode D2, one end of a resistor R64 and the supervision switching end of the buck converter U2, the anode of the diode D2 is connected with the power ground, the other end of the resistor R64 is connected with one end of a capacitor C57, and the other end of the capacitor C57 is connected with the power ground.
The supervision switching end of the buck converter U2 is connected with one end of an inductor L6, the other end of the inductor L6 is a 3.3V switch power supply end, the power input end of the buck converter U2 is connected with one end of a resistor R115, the other end of the resistor R115 is connected with the power supply end, the enabling signal input end of the buck converter U2 is connected with one end of a resistor R53, one end of a resistor R82 and the negative electrode of a switching diode D1, the first positive electrode of the switching diode D1 is connected with the other end of the resistor R82 and the MCUU63.3V switch power supply enabling signal output end, the second positive electrode of the switching diode D1 is connected with one end of a resistor R54, and the other end of the resistor R54 is the screen awakening input end of the buck converter U2. The reverse input end of the buck converter U2 is connected with one end of a resistor R63 and one end of a resistor R61, the other end of the resistor R63 is connected with the power ground, the other end of the resistor R61 is connected with one end of a resistor R62, and the other end of the resistor R62 is connected with the other end of an inductor L6.
The first low-voltage signal positive electrode of the deserializer U1 is connected with the first output end of the filter L10, the first low-voltage signal negative electrode of the deserializer U1 is connected with the second output end of the filter L10, the first input end of the filter L10 is connected with one end of the protection diode ESD6 and the fourth end of the RF connector J4, the other end of the protection diode ESD6 is connected with the power ground, the second input end of the filter L10 is connected with one end of the protection diode ESD8 and the second end of the RF connector J4, and the other end of the protection diode ESD8 is connected with the power ground.
The positive electrode of the second low-voltage signal of the deserializer U1 is connected with the third output end of the filter L10, the negative electrode of the second low-voltage signal of the deserializer U1 is connected with the fourth output end of the filter L10, the third input end of the filter L10 is connected with one end of the protection diode ESD7 and the third end of the RF connector J4, the other end of the protection diode ESD7 is connected with the power ground, the fourth input end of the filter L10 is connected with one end of the protection diode ESD5 and the first end of the RF connector J4, and the other end of the protection diode ESD5 is connected with the power ground. The external device is connected through the deserializer U1.
The TFT display screen signal output end is also connected with the MCUU6TFT signal output end, the TFT display screen clock input end is also connected with the MCUU6TFT clock output end, the TFT display screen data transmission end is also connected with the MCUU6TFT data transmission end, the TFT display screen reset end is also connected with the MCUU6TFT reset end, and the external adapting device is connected through the MCUU 6. The MCUU6TFT self-test starting output end is connected with the TFT display screen self-test starting input end, the MCUU6TFT fault signal input end is connected with the TFT display screen fault signal output end, and the MCUU6TFT passband cutoff frequency transmission end is connected with the TFT display screen passband cutoff frequency transmission. The MCUU6 backlight sampling signal input end is connected with the TFT display screen backlight sampling signal output end,
The TFT display screen signal output end is also connected with the deserializer U1 screen signal output end, the TFT display screen clock input end is also connected with the deserializer U1 screen clock output end, the TFT display screen data transmission end is also connected with the deserializer U1 screen data transmission end, the TFT display screen reset end is also connected with the deserializer U1 screen reset end, and the TFT display screen reset end is connected with external adapting equipment through the deserializer U1. The pixel signal output end of the deserializer U1 is connected with the pixel signal input end of the TFT display screen, the illumination signal transmission end of the LED illumination driver U7 is connected with the illumination signal transmission end of the TFT display screen,
the TFT display screen signal output end is also connected with the wiring row J1 screen signal output end, the TFT display screen clock input end is also connected with the wiring row J1 screen clock output end, the TFT display screen data transmission end is also connected with the wiring row J1 screen data transmission end, the TFT display screen reset end is also connected with the wiring row J1 screen reset end, and the external adapting equipment is connected through the wiring row J1.
The LED illumination driver U7 voltage input end is connected with one end of a resistor R107, the other end of the resistor R107 is connected with the U7 power supply end and one end of an inductor L12, the other end of the inductor L12 is connected with the anode of a diode D8, the cathode of the diode D8 is connected with one end of a resistor R109 and one end of a resistor R86, the other end of the resistor R109 is connected with the TFT display screen backlight signal input end, the other end of the resistor R86 is connected with one end of a resistor R87, the other end of the resistor R87 is connected with one end of a resistor R88 and the overvoltage protection end of the LED illumination driver U7, and the other end of the resistor R88 is connected with the power ground.
The working voltage end of the LED illumination driver U7 is connected with one end of a resistor R106 and the cathode of a diode D9, the other end of the resistor R106 is connected with the anode of the diode D9 and one end of a capacitor C85, the other end of the capacitor C85 is connected with one end of a resistor R105 and one end of a capacitor C87, the other end of the resistor R105 and the other end of the capacitor C87 are both connected with the end of the LED illumination driver U7ADR, and the signal output end of the LED illumination driver U7 is connected with the signal input end of a wiring row J2 LED.
The MCUU6 backlight I2C clock signal output end is connected with the LED illumination driver U7 backlight I2C clock signal input end, and the MCUU6 backlight I2C data signal transmission end is connected with the LED illumination driver U7 backlight I2C data signal transmission end.
The invention also provides a working method of the L-shaped central control screen of the automobile, which comprises the following steps:
s1, after an automobile is electrified, a display instrument is in a standby state;
s2, triggering a screen awakening key of the automobile, transmitting a screen awakening signal of the automobile to the MCU (U6) through the wiring row J3, awakening the MCU (U6), and outputting 3.3V voltage to supply power for the MCU (U6) through the buck converter U2;
s3, after the MCU is started, outputting a high level to the buck converter U2, and locking a pin of the buck converter U2 EN;
s4, the MCU receives detection signals of screen voltage sampling signals, and if the screen voltage accords with a set value, a TFT display screen, a deserializer and an LED illumination driver U7 are initialized;
S5, after the TFT display screen, the deserializer and the LED illumination driver U7 are initialized, the TFT display screen, the deserializer, the touch controller and the LED illumination driver U7 are started, and the display instrument displays image information and responds to touch operation of a user;
s6, continuously monitoring the power supply voltage, and transmitting a power supply voltage sampling signal to a power supply voltage sampling circuit by the MCU, wherein the voltage sampling circuit transmits the detected sampling data of the power supply voltage to the MCU;
and S7, when the display screen is required to be closed, triggering a screen sleep key of the automobile, transmitting a screen wake-up signal of the automobile to the MCU (U6) through the wiring row J3, sequentially closing the TFT display screen, the deserializer and the LED lighting driver U7, closing the output of the buck converter U2, entering a sleep mode, and waiting for the MCU (U6) to wake up again to enter a normal working mode.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (7)
1. An automobile L-shaped central control screen is characterized in that: the display driving circuit and the instrument shell (3) are included, a screen shell (3 a) for installing a TFT display screen is vertically arranged on the front side of the instrument shell (3), and a glass cover plate (1) is installed on the front side opening of the screen shell (3 a);
The rear side of the screen shell (3 a) is transversely provided with a circuit shell (3 b) for installing a circuit board (4), a display driving circuit is integrated on the circuit board (4), a circle of positioning ribs (3 e) for circumferentially positioning the circuit board (4) are arranged in the circuit shell (3 b), and the screen shell (3 a) is communicated with the circuit shell (3 b);
the parts, which are close to the rear sides, of the left side and the right side of the circuit shell (3 b) are concavely arranged inwards to form a convex shape with a large front end and a small rear end, wherein the concaved parts of the circuit shell (3 b) are used for being inserted into an automobile instrument panel, the insertion depth is limited by the parts with the large front end of the circuit shell (3 b), guide ribs (10) extending forwards and backwards are convexly arranged on the concaved parts of the left side and the right side of the circuit shell (3 b), and limiting protrusions (9) which are arranged at intervals front and back are respectively arranged on the guide ribs (10); two buckles (8) used for being clamped on an automobile instrument board are arranged at left and right intervals on the rear side of the circuit shell (3 b), and a net opening and an RF connector (J4) are also arranged on the rear side of the circuit shell (3 b); the top of the circuit shell (3 b) is detachably connected with a backboard (5), a row of fixed mounting holes are formed on the backboard (5) near the front side, the board body part around the fixed mounting holes on the backboard (5) deflects downwards to form a fixed column (5 a), the bottom of the fixed column (5 a) is propped against the bottom of the circuit shell (3 b), and the backboard (5) is fixed on the circuit shell (3 b) through a fixed screw;
The display driving circuit comprises an MCU (U6), a deserializer U1, a TFT display screen and an LED illumination driver U7, wherein the power supply driving output end of the MCU (U6) decoder is connected with the driving signal input end of the decoder power supply circuit, and the driving signal output end of the decoder power supply circuit is connected with the power supply input end and the IO voltage input end of the deserializer U1; the MCU (U6) TFT power supply driving output end is connected with the TFT power supply circuit driving signal input end, the MCU (U6) screen enabling signal output end is connected with the TFT display screen enabling circuit screen enabling signal input end, the MCU (U6) I2C bus transmission end is connected with the LED illumination driver U7I2C bus transmission end, the MCU (U6) TFT backlight driving signal output end is connected with the deserializer U1TFT backlight driving signal input end and the LED illumination driver U7TFT backlight driving signal input end, the MCU (U6) TFT backlight PWM signal output end is connected with the deserializer U1TFT backlight PWM signal input end and the LED illumination driver U7TFT backlight PWM signal input end, and the MCU (U6) TFT backlight fault signal output end is connected with the LED illumination driver U7TFT backlight fault signal input end;
the MCU (U6) backlight I2C bus signal transmission end is connected with the LED illumination driver U7 backlight I2C bus signal transmission end;
The power supply voltage sampling circuit is connected with the sampling end of the power supply, and the sampling signal output end of the power supply voltage sampling circuit is connected with the sampling signal input end of the MCU (U6);
the voltage stabilizing circuit comprises a diode D3, the positive electrode of the diode D3 is connected with a power supply end, the negative electrode of the diode D3 is connected with a voltage input end VIN of a voltage stabilizer U3 and an enabling end EN of the voltage stabilizer U3, a power output end VOUT of the voltage stabilizer U3 is connected with one end of a capacitor C59 and one end of a resistor R65, the other end of the capacitor C59 is connected with a power ground, one end of the resistor R65 is a 3.3VMCU power supply end, and the other end of the resistor R65 is connected with a 3.3V switch power supply end; the voltage input end VIN of the voltage stabilizer U3 and the enabling end of the voltage stabilizer U3 are connected with one end of a capacitor C60 and one end of a capacitor C61, the other end of the capacitor C60 and the other end of the capacitor C61 are connected with power ground, and the power ground end GND of the voltage stabilizer U3 is connected with power ground;
the enable input end EN of the voltage stabilizer U4 is connected with one end of a resistor R74, one end of a resistor R73 and one end of a resistor R72, the other end of the resistor R74 is connected with a MCU (U6) 1.2V switch power supply driving output end PTD0, the other end of the resistor R72 is connected with power ground, the voltage input end VIN of the voltage stabilizer U4 is connected with the other end of the resistor R72, one end of a capacitor C69 and a 3.3V switch power supply end, one end of the capacitor C69 is connected with power ground, the voltage output end VOUT of the voltage stabilizer U4 outputs 1.2V voltage, one end of the resistor R75 is connected with one end of the capacitor C68, the other end of the resistor R75 is connected with one end of the resistor R76 and the voltage feedback end ADJ of the voltage stabilizer U4, and the other end of the resistor R76 and the other end of the capacitor C68 are both connected with power ground; the power ground end GND of the voltage stabilizer U4 is connected with power ground;
The decoder power supply circuit comprises a resistor R136, wherein one end of the resistor R136 is connected with a MCU (U6) decoder power supply driving output end PTA6, the other end of the resistor R136 is connected with one end of a resistor R135 and a base electrode of a triode Q8, the other end of the resistor R135 and an emitting electrode of the triode Q8 are both connected with power supply ground, a collector electrode of the triode Q8 is connected with one end of the resistor R138, the other end of the resistor R138 is connected with one end of a resistor R137, one end of a capacitor C98 and a grid electrode of a MOS tube Q7, a source electrode of the MOS tube Q7 is connected with one end of the resistor R139, the other end of the resistor R137, the other end of the capacitor C98 and a 3.3V switch power supply end, a drain electrode of the MOS tube Q7 is connected with the other end of the resistor R139, one end of the resistor R134, one end of the inductor L3 and one end of the inductor L8, the other end of the inductor L134 is connected with the power supply input end of a deserializer U1, and the other end of the inductor L8 is connected with the input end of an IO voltage of the deserializer U1;
the TFT power supply circuit comprises a resistor R77, wherein one end of the resistor R77 is connected with an MCU (U6) TFT power supply driving output end PTD4, the other end of the resistor R77 is connected with one end of a resistor R78 and a base electrode of a triode Q4, the other end of the resistor R78 and an emitting electrode of the triode Q4 are both connected with power supply ground, a collector electrode of the triode Q4 is connected with one end of a resistor R79, the other end of the resistor R79 is connected with one end of a resistor R80, one end of a capacitor C45 and a grid electrode of a MOS tube Q5, a source electrode of the MOS tube Q5 is connected with the other end of the resistor R80, the other end of the capacitor C45 and a 3.3V switch power supply end, a drain electrode of the MOS tube Q5 is connected with one end of a resistor R81 and a 3.3VTFT power supply end, and the other end of the resistor R81 is connected with power supply ground;
The power supply circuit comprises one end of a capacitor C64 connected with the first end of the wiring row J3, the positive electrode of a diode D5 and the negative electrode of a diode D4, wherein the positive electrode of the diode D5 is a voltage sampling end of a power supply, the other end of the capacitor C64 is connected with one end of a capacitor C65, the other end of the capacitor C65 and the positive electrode of the diode D4 are both connected with power supply ground, the negative electrode of the diode D5 is connected with one end of an inductor L9 and one end of a capacitor C62, the other end of the capacitor C62 is connected with power supply ground, the other end of the inductor L9 is a power supply end and is connected with one end of a capacitor C63, and the other end of the capacitor C63 is connected with power supply ground;
the TFT display screen enabling circuit comprises one end of a capacitor C66 and the positive electrode of a diode D6 which are connected with the fifth end of a wiring row J3, the fifth end of the wiring row J3 is connected with the screen wake-up signal output end of an automobile, the other end of the capacitor C66 is connected with the power ground, the negative electrode of the diode D6 is connected with the screen wake-up input end of a buck converter U2 and one end of a resistor R56, one end of a resistor R59 is connected with one end of a resistor R55, the other end of the resistor R55 is connected with the power ground, the other end of the resistor R56 is connected with one end of a resistor R57 and the base of a diode Q1, the other end of the resistor R57 and the emitter of the diode Q1 are both connected with the power ground, one end of a resistor R58 is connected with one end of a resistor R133, the other end of the resistor R133 is connected with the base of the diode Q6, the other end of the resistor R58 is connected with the emitter of the diode Q6 and the power supply end of a 3.3VMCU, the collector of the diode Q6 is connected with one end of a resistor R131, and the other end of the resistor R131 is connected with the other end of the resistor R132; the other end of the resistor R132 is a screen enabling signal output end and is connected with a MCU (U6) screen enabling signal input end;
The other end of the resistor R59 is connected with one end of the resistor R60, the other end of the resistor R60 is connected with the power ground, the other end of the resistor R59 is a screen voltage sampling signal output end and is connected with an MCU (U6) screen voltage sampling signal input end.
2. The automotive L-shaped center control screen of claim 1, wherein: the backboard (5) is concavely provided with a yielding groove (6) with an axis extending leftwards and rightwards.
3. The automotive L-shaped center control screen of claim 1, wherein: and a yielding pit (3 f) for yielding the TFT wiring row is arranged at the inner side of the screen shell (3 a) near the bottom.
4. The automotive L-shaped center control screen of claim 1, wherein: and a plurality of threaded mounting holes are formed in the positioning ribs (3 e).
5. The automotive L-shaped center control screen of claim 1, wherein: decorative strips (2) are arranged on the left side and the right side of the glass cover plate (1).
6. The automotive L-shaped center control screen of claim 1, wherein: the power supply voltage sampling circuit comprises a resistor R69 connected with the MCU (U6) power supply voltage sampling driving output end, wherein the other end of the resistor R69 is connected with one end of a resistor R70 and the base electrode of a triode Q3, the emitter electrode of the triode Q3 and the other end of the resistor R70 are both connected with the power supply ground, the collector electrode of the triode Q3 is connected with one end of a resistor R66, the other end of the resistor R66 is connected with one end of the resistor R70 and the base electrode of the triode Q2, the emitter electrode of the triode Q2 is connected with the other end of the resistor R70 and the voltage sampling end of the power supply, the collector electrode of the triode Q2 is connected with one end of a resistor R67, the other end of the resistor R67 is connected with one end of a resistor R68 and the MCU (U6) power supply voltage sampling signal input end, and the other end of the resistor R68 is connected with the power supply ground;
The power bias end of the buck converter U2 is connected with one end of a resistor R52, the other end of the resistor R52 is connected with one end of a capacitor C48, the other end of the capacitor C48 is connected with the negative electrode of a diode D2, one end of a resistor R64 and the supervision switching end of the buck converter U2, the positive electrode of the diode D2 is connected with the power ground, the other end of the resistor R64 is connected with one end of a capacitor C57, and the other end of the capacitor C57 is connected with the power ground;
the supervision switching end of the buck converter U2 is connected with one end of an inductor L6, the other end of the inductor L6 is a 3.3V switch power supply end, the power input end of the buck converter U2 is connected with one end of a resistor R115, the other end of the resistor R115 is connected with the power supply end, the enabling signal input end of the buck converter U2 is connected with one end of a resistor R53, one end of a resistor R82 and the negative electrode of a switching diode D1, the first positive electrode of the switching diode D1 is connected with the other end of the resistor R82 and the 3.3V switch power supply enabling signal output end of an MCU (U6), the second positive electrode of the switching diode D1 is connected with one end of a resistor R54, and the other end of the resistor R54 is the screen awakening input end of the buck converter U2; the reverse input end of the buck converter U2 is connected with one end of a resistor R63 and one end of a resistor R61, the other end of the resistor R63 is connected with the power ground, the other end of the resistor R61 is connected with one end of a resistor R62, and the other end of the resistor R62 is connected with the other end of an inductor L6;
The first low-voltage signal positive electrode of the deserializer U1 is connected with the first output end of the filter L10, the first low-voltage signal negative electrode of the deserializer U1 is connected with the second output end of the filter L10, the first input end of the filter L10 is connected with one end of the protection diode ESD6 and the fourth end of the RF connector J4, the other end of the protection diode ESD6 is connected with the power ground, the second input end of the filter L10 is connected with one end of the protection diode ESD8 and the second end of the RF connector J4, and the other end of the protection diode ESD8 is connected with the power ground;
the second low-voltage signal positive electrode of the deserializer U1 is connected with the third output end of the filter L10, the second low-voltage signal negative electrode of the deserializer U1 is connected with the fourth output end of the filter L10, the third input end of the filter L10 is connected with one end of the protection diode ESD7 and the third end of the RF connector J4, the other end of the protection diode ESD7 is connected with the power ground, the fourth input end of the filter L10 is connected with one end of the protection diode ESD5 and the first end of the RF connector J4, and the other end of the protection diode ESD5 is connected with the power ground; the external equipment is connected through the deserializer U1;
the TFT display screen signal output end is also connected with the MCU (U6) TFT signal output end, the TFT display screen clock input end is also connected with the MCU (U6) TFT clock output end, the TFT display screen data transmission end is also connected with the MCU (U6) TFT data transmission end, the TFT display screen reset end is also connected with the MCU (U6) TFT reset end, and the TFT display screen reset end is connected with external adapting equipment through the MCU (U6); the MCU (U6) TFT self-test starting output end is connected with the TFT display screen self-test starting input end, the MCU (U6) TFT fault signal input end is connected with the TFT display screen fault signal output end, and the MCU (U6) TFT passband cut-off frequency transmission end is connected with the TFT display screen passband cut-off frequency transmission; the MCU (U6) backlight sampling signal input end is connected with the TFT display screen backlight sampling signal output end,
The TFT display screen signal output end is also connected with the deserializer U1 screen signal output end, the TFT display screen clock input end is also connected with the deserializer U1 screen clock output end, the TFT display screen data transmission end is also connected with the deserializer U1 screen data transmission end, the TFT display screen reset end is also connected with the deserializer U1 screen reset end, and the TFT display screen reset end is connected with external adapting equipment through the deserializer U1; the pixel signal output end of the deserializer U1 is connected with the pixel signal input end of the TFT display screen, the illumination signal transmission end of the LED illumination driver U7 is connected with the illumination signal transmission end of the TFT display screen,
the TFT display screen signal output end is also connected with the wiring row J1 screen signal output end, the TFT display screen clock input end is also connected with the wiring row J1 screen clock output end, the TFT display screen data transmission end is also connected with the wiring row J1 screen data transmission end, the TFT display screen reset end is also connected with the wiring row J1 screen reset end, and the TFT display screen reset end is connected with external adapting equipment through the wiring row J1;
the voltage input end of the LED illumination driver U7 is connected with one end of a resistor R107, the other end of the resistor R107 is connected with the U7 power supply end and one end of an inductor L12, the other end of the inductor L12 is connected with the anode of a diode D8, the cathode of the diode D8 is connected with one end of a resistor R109 and one end of a resistor R86, the other end of the resistor R109 is connected with the backlight signal input end of the TFT display screen, the other end of the resistor R86 is connected with one end of a resistor R87, the other end of the resistor R87 is connected with one end of a resistor R88 and the overvoltage protection end of the LED illumination driver U7, and the other end of the resistor R88 is connected with the power ground;
The working voltage end of the LED illumination driver U7 is connected with one end of a resistor R106 and the cathode of a diode D9, the other end of the resistor R106 is connected with the anode of the diode D9 and one end of a capacitor C85, the other end of the capacitor C85 is connected with one end of a resistor R105 and one end of a capacitor C87, the other end of the resistor R105 and the other end of the capacitor C87 are both connected with the end of the LED illumination driver U7ADR, and the signal output end of the LED illumination driver U7 is connected with the signal input end of a wiring row J2 LED;
the MCU (U6) backlight I2C clock signal output end is connected with the LED illumination driver U7 backlight I2C clock signal input end, and the MCU (U6) backlight I2C data signal transmission end is connected with the LED illumination driver U7 backlight I2C data signal transmission end.
7. The working method of the L-shaped central control screen of the automobile is characterized by comprising the following steps of: the method comprises the following steps:
s1, after an automobile is electrified, a display instrument is in a standby state;
s2, triggering a screen awakening key of the automobile, transmitting a screen awakening signal of the automobile to the MCU (U6) through the wiring row J3, awakening the MCU (U6), and outputting 3.3V voltage to supply power for the MCU (U6) through the buck converter U2;
s3, after the MCU is started, outputting a high level to the buck converter U2, and locking a pin of the buck converter U2 EN;
s4, the MCU receives detection signals of screen voltage sampling signals, and if the screen voltage accords with a set value, a TFT display screen, a deserializer and an LED illumination driver U7 are initialized;
S5, after the TFT display screen, the deserializer and the LED illumination driver U7 are initialized, the TFT display screen, the deserializer, the touch controller and the LED illumination driver U7 are started, and the display instrument displays image information and responds to touch operation of a user;
s6, continuously monitoring the power supply voltage, and transmitting a power supply voltage sampling signal to a power supply voltage sampling circuit by the MCU, wherein the voltage sampling circuit transmits the detected sampling data of the power supply voltage to the MCU;
and S7, when the display screen is required to be closed, triggering a screen sleep key of the automobile, transmitting a screen wake-up signal of the automobile to the MCU (U6) through the wiring row J3, sequentially closing the TFT display screen, the deserializer and the LED lighting driver U7, closing the output of the buck converter U2, entering a sleep mode, and waiting for the MCU (U6) to wake up again to enter a normal working mode.
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