CN109817132A - Liquid crystal display die set test board - Google Patents
Liquid crystal display die set test board Download PDFInfo
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- CN109817132A CN109817132A CN201910133950.4A CN201910133950A CN109817132A CN 109817132 A CN109817132 A CN 109817132A CN 201910133950 A CN201910133950 A CN 201910133950A CN 109817132 A CN109817132 A CN 109817132A
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Abstract
The present invention provides a kind of liquid crystal display die set test boards, comprising: Voltag driving circuit is electrically connected with the output end of power supply；TF card storage circuit；Usb circuit；Program download interface circuit；Display module interface circuit；Main control unit.The design that the present invention passes through Voltag driving circuit, the power demands of each electronic component on liquid crystal display die set test board are effectively ensured, and then improve the stability of liquid crystal display die set test board test, pass through TF card storage circuit, the design of usb circuit and program download interface circuit, accuracy of the effective guarantee for liquid crystal display die set test content to be measured, pass through the design of display module interface circuit, the electrical connection between liquid crystal display die set to be measured is effectively ensured, pass through the design of main control unit, it has effectively ensured and circuit each on liquid crystal display die set test board has been accurately controlled, further improve the stability of liquid crystal display die set test board test.
Description
Technical field
The present invention relates to liquid crystal display mode technical group field, in particular to a kind of liquid crystal display die set test board.
Background technique
With the development of science and technology, electronic product is more and more widely used daily life, such as hand
Machine, plate, camera etc..Wherein, the quality of indispensable building block of the liquid crystal display die set as electronic product, performance is very big
The quality for determining the electronic product of degree and the experience sense of user.Therefore, liquid crystal display die set is generally wanted after factory
By largely testing, test passes and effect is fine could release market, therefore, for the property of liquid crystal display die set
It can test and increasingly be paid attention to by people.
Existing liquid crystal display die set test, is realized generally by test board, and existing liquid crystal display die set is tested
The structure of plate is usually to be made of four power circuit, single-chip microcontroller, outer despreading circuit and display interface parts, existing liquid crystal display
In mould group test board use process, test performance is unstable and test function is few, reduces the test for liquid crystal display die set
Efficiency.
Summary of the invention
Based on this, the embodiment of the present invention is designed to provide a kind of liquid crystal display die set that measuring stability is high test
Plate.
A kind of liquid crystal display die set test board, comprising:
Voltag driving circuit is electrically connected with the output end of power supply, and the Voltag driving circuit is used for the confession
The output voltage of power supply is converted to operating voltage required for each circuit on the liquid crystal display die set test board；
TF card storage circuit, required picture to be shown when for storing liquid crystal display die set test；
Usb circuit, for downloading the picture to be shown by control USB port, and by the picture to be shown
It is sent in the TF card storage circuit, or is supplied by controlling the USB port to the liquid crystal display die set test board
Electricity；
Program download interface circuit, it is required when the liquid crystal display die set is tested for being downloaded by control download interface
Control program；
Display module interface circuit, for connecting the liquid crystal display die set to be tested, and to the liquid crystal display mode
Group carries out data transmission, the voltage output end of the display module interface circuit and the voltage output end of the Voltag driving circuit
It is electrically connected；
Main control unit, respectively with the TF card storage circuit, the usb circuit, described program download interface circuit
It is electrically connected between the display module interface circuit, the voltage output end of the main control unit and the Voltag driving circuit
Voltage output end be electrically connected, the main control unit is used for the TF card storage circuit, usb circuit, described
The circuit state of program download interface circuit and the display module interface circuit is controlled.
Above-mentioned liquid crystal display die set test board has effectively ensured the liquid by the design of the Voltag driving circuit
The power demands of each electronic component on brilliant display module test board, and then improve the liquid crystal display die set test board and survey
The stability of examination, by the TF card storage circuit, the design of the usb circuit and described program download interface circuit,
Effective guarantee passes through setting for the display module interface circuit for the accuracy of liquid crystal display die set test content to be measured
Meter, has effectively ensured the electrical connection between the liquid crystal display die set to be measured, by the design of the main control unit,
It has effectively ensured and each circuit on the liquid crystal display die set test board has been accurately controlled, further improved the liquid crystal
The stability of display module test board test.
Further, level shifting circuit is equipped between the display module interface circuit and the main control unit, it is described
Level shifting circuit is used to be converted to the working voltage that the main control unit exports and show needed for the display module interface circuit
Show voltage.
Further, the level shifting circuit includes electrical level transferring chip and is connected respectively set on the level conversion core
Level conversion resistance on piece 26,27,29,30,32,33,35,36,37,38,40,41,43,44,46 and 47 pins, it is described
The model SN74AVC16T245 of electrical level transferring chip, the resistance value of the level conversion resistance are 33R.
Further, the Voltag driving circuit includes voltage driver chips and electrical with the voltage driver chips respectively
The 3rd resistor of connection, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth electricity
Resistance, the second inductance, third inductance, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor and
Tenth capacitor is equipped with the 8th capacitor, the third inductance and the tenth electricity between second inductance and the 9th resistance
The 9th capacitor is equipped between resistance.
Further, the TF card storage circuit includes TF chip, the third with the 2nd pin of TF chip electric connection
Ten resistance, the 31st resistance being electrically connected with the 3rd pin of TF chip are electrically connected with the 7th pin of TF chip
The 32nd resistance and the 33rd resistance that is electrically connected with the 5th pin of TF chip, and the 30th resistance, institute
The resistance value for stating the 31st resistance, the 32nd resistance and the 33rd resistance is 100K.
Further, the usb circuit includes the 19th resistance being electrically connected with the 3rd pin of USB port
With the 20th resistance being electrically connected with the 2nd pin of USB port, and on the 19th pin and the 20th pin
Series connection is equipped with LED light.
Further, described program download interface circuit includes the 21 be electrically connected respectively with the download interface
Resistance, the 22nd resistance, the 23rd resistance, the 24th resistance, the 14th capacitor, the 15th capacitor, diode and multiple
Position key.
Further, the main control unit include main control singlechip and with the main control singlechip be electrically connected the 12nd
Resistance, thirteenth resistor, the 12nd capacitor and the 29th capacitor, the model C8051F340 of the main control singlechip.
Further, the liquid crystal display die set test board further includes key circuit, the key circuit include respectively with
The beginning key and stop key that the main control singlechip is electrically connected, series connection is equipped with the tenth on the input terminal for starting key
Six resistance, series connection is equipped with the 17th resistance, the 16th resistance and the master control monolithic on the input terminal to stop key
The KEY-NEXT pin of machine is electrically connected, and the KEY-STOP pin of the 17th resistance and the main control singlechip electrically connects
It connects, and the resistance value of the 16th resistance and the 17th resistance is 1K.
Further, the display module interface circuit includes that the serial peripheral being electrically connected with the main control unit connects
Mouthful.
Detailed description of the invention
Fig. 1 is the electrical block diagram for the liquid crystal display die set test board that first embodiment of the invention provides；
Fig. 2 is the electrical block diagram of Voltag driving circuit in Fig. 1；
Fig. 3 is the electrical block diagram of TF card storage circuit in Fig. 1；
Fig. 4 is the electrical block diagram of usb circuit in Fig. 1；
Fig. 5 is the electrical block diagram of program download interface circuit in Fig. 1；
Fig. 6 is the electrical block diagram of main control unit in Fig. 1；
Fig. 7 is the electrical block diagram for the key circuit that first embodiment of the invention provides；
Fig. 8 is the electrical block diagram of display module interface circuit in Fig. 1；
Fig. 9 is the electrical block diagram for the liquid crystal display die set test board that second embodiment of the invention provides；
Figure 10 is the electrical block diagram of level shifting circuit in Fig. 9；
Essential element symbol description
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.Several embodiments of the invention are given in attached drawing.But the present invention can be to be permitted
Mostly different form is realized, however it is not limited to embodiment described herein.On the contrary, purpose of providing these embodiments is makes
It is more thorough and comprehensive to the disclosure.
It should be noted that it can directly on the other element when element is referred to as " being fixedly arranged on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side ", "upper", "lower" and similar statement for illustrative purposes only, rather than the device or member of indication or suggestion meaning
Part must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Referring to Fig. 1, first embodiment of the invention provides a kind of liquid crystal display die set test board 100, comprising:
Voltag driving circuit 10 is electrically connected with the output end of power supply, and the Voltag driving circuit 10 is used for institute
The output voltage for stating power supply is converted to operating voltage required for each circuit on the liquid crystal display die set test board 100；
TF card storage circuit 20, required picture to be shown when for storing liquid crystal display die set test；Usb circuit 30, is used for
The picture to be shown is downloaded by control USB port USB1, and the picture to be shown is sent to the TF card and stores electricity
In road 20, or it is powered to the liquid crystal display die set test board 100 by controlling the USB port USB1；Program downloading
Interface JATG circuit 40, for downloading control journey required when the liquid crystal display die set is tested by controlling download interface JATG
Sequence；Display module interface circuit 50, for connecting the liquid crystal display die set to be tested, and to the liquid crystal display die set into
The transmission of row data, the voltage output end of the voltage output end of the display module interface circuit 50 and the Voltag driving circuit 10
It is electrically connected；
Main control unit 60 connects with the TF card storage circuit 20, the usb circuit 30, described program downloading respectively
Be electrically connected between mouthful JATG circuit 40 and the display module interface circuit 50, the voltage output end of the main control unit 60 with
The voltage output end of the Voltag driving circuit 10 is electrically connected, and the main control unit 60 is used for the TF card storage circuit
20, the circuit of the usb circuit 30, described program download interface JATG circuit 40 and the display module interface circuit 50
State is controlled.
Specifically, referring to Fig. 2, the Voltag driving circuit 10 include voltage driver chips U5 and respectively with the voltage
3rd resistor R3 that driving chip U5 is electrically connected, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the
Eight resistance R8, the 9th resistance R9, the tenth resistance R10, the second inductance L2, third inductance L3, the second capacitor C2, third capacitor C3,
4th capacitor C4, the 5th capacitor C5, the 6th capacitor C6, the 7th capacitor C7 and the tenth capacitor C10, the second inductance L2 with it is described
It is equipped with the 8th capacitor C8 between 9th resistance R9, the 9th capacitor is equipped between the third inductance L3 and the tenth resistance R10
C9, specifically, in the present embodiment, the 6th of the 3rd resistor R3 and the 4th resistance R4 and voltage driver chips U5 the
Pin is electrically connected, and the 12nd pin of the 5th resistance R5 and the 6th resistance R6 and voltage driver chips U5 are electrical
8th pin of connection, the second inductance L2 and the voltage driver chips U5 is electrically connected, the 7th resistance R7 with it is described
The 4th pin of voltage driver chips U5 is electrically connected, the 9th resistance R9, the 6th capacitor C6 and the 7th capacitor C7
It is electrically connected with the 9th pin of the voltage driver chips U5, the tenth resistance R10, eleventh resistor R11, the tenth capacitor
The 3rd pin of the C10 and voltage driver chips U5 is electrically connected, the third inductance L3 and voltage driver chips U5's
2nd pin is electrically connected.
Preferably, referring to Fig. 3, the TF card storage circuit 20 includes TF chip TF and the 2nd pin of TF chip TF
Be electrically connected the 30th resistance R30, with the 3rd pin of TF chip TF electric connection the 31st resistance R31, with it is described
The 32nd resistance R32 and the third being electrically connected with the 5th pin of TF chip TF that the 7th pin of TF chip TF is electrically connected
13 resistance R33, and the 30th resistance R30, the 31st resistance R31, the 32nd resistance R32 and described
The resistance value of 33rd resistance R33 is 100K.
In the present embodiment, referring to Fig. 4, the usb circuit 30 includes and the 3rd pin of the USB port USB1 electricity
Property connection the 19th resistance R19 and the 20th resistance R20 that is electrically connected with the 2nd pin of USB port USB1, and it is described
Series connection is equipped with LED light (LED5, LED6) on 19th pin and the 20th pin.
Referring to Fig. 5, described program download interface JATG circuit 40 includes electrically connecting with the download interface JATG respectively
The 21st resistance R21, the 22nd resistance R22, the 23rd resistance R23, the 24th resistance R24, the 14th electricity connect
Hold C14, the 15th capacitor C15, diode D3 and reset key SW1, specifically, in the present embodiment, the 23rd resistance R23 with
The 1st port of the download interface JATG is electrically connected, the 21st resistance R21, the 22nd resistance R22, the 14th capacitor
C14 and the 15th capacitor C15 is electrically connected with the 3rd port of the download interface JATG and the 5th port, the download interface
On the 4th port of JATG series connection be equipped with the 24th resistance R24, the diode D3 and the reset key SW1 with it is described
The 9th port of download interface JATG is electrically connected.
Specifically, referring to Fig. 6, the main control unit 60 is electric including main control singlechip U1 and with the main control singlechip U1
Property connection twelfth resistor R12, thirteenth resistor R13, the 12nd capacitor C12 and the 29th capacitor C29, the master control list
The model C8051F340 of piece machine U1, twelfth resistor R12 and the 12nd capacitor C12 with the main control singlechip U1
10 and the 11st pin is electrically connected, and the 12nd pin of thirteenth resistor R13 and the main control singlechip U1 are electrically connected.
Fig. 7 to Fig. 8 is please referred to, the liquid crystal display die set test board 100 further includes key circuit, the key circuit packet
It includes respectively with the main control singlechip U1 beginning key SW2 the being electrically connected and SW3 that stops key, it is described to start key SW2's
Series connection is equipped with the 16th resistance R16 on input terminal, and series connection is equipped with the 17th resistance R17 on the input terminal of the SW3 that stops key,
The KEY-NEXT pin of the 16th resistance R16 and the main control singlechip U1 are electrically connected, the 17th resistance R17 with
The KEY-STOP pin of the main control singlechip U1 is electrically connected, and the 16th resistance R16 and the 17th resistance R17
Resistance value be 1K, the display module interface circuit 50 include with the main control unit 60 be electrically connected Serial Peripheral Interface (SPI)
CON1。
In the present embodiment, by the design of the Voltag driving circuit 10, the liquid crystal display die set has effectively been ensured
The power demands of each electronic component on test board 100, and then improve what the liquid crystal display die set test board 100 was tested
Stability passes through the TF card storage circuit 20, the usb circuit 30 and described program download interface JATG circuit 40
Design, effective guarantee pass through the display module interface circuit for the accuracy of liquid crystal display die set test content to be measured
50 design has effectively ensured the electrical connection between the liquid crystal display die set to be measured, has passed through the main control unit
60 design has effectively been ensured and has been accurately controlled to each circuit on the liquid crystal display die set test board 100, further mentioned
The stability that the high liquid crystal display die set test board 100 is tested.
Referring to Fig. 9, second embodiment of the invention provides a kind of liquid crystal display die set test board 100a, the second embodiment
It is more or less the same with the structure of first embodiment, difference be, in the present embodiment, the display module interface circuit 50 with it is described
Level shifting circuit 70 is equipped between main control unit 60, what the level shifting circuit 70 was used to export the main control unit 60
Working voltage is converted to and shows voltage needed for the display module interface circuit 50.
Specifically, referring to Fig. 10, the level shifting circuit 70 includes electrical level transferring chip (U2, U3) and connects respectively
26,27,29,30,32,33,35,36,37,38,40,41,43,44,46 and 47 on the electrical level transferring chip (U2, U3)
Level conversion resistance on pin, the model SN74AVC16T245 of the electrical level transferring chip (U2, U3), the level turn
The resistance value for changing resistance is 33R, specifically, in the present embodiment, it, effectively will be described by the design of the level shifting circuit 70
I/O mouthfuls of voltages of output signal of main control singlechip U1 are converted to the I/O mouth voltage of the display module interface circuit 50, Jin Erti
The high stability of the liquid crystal display die set test board 100a test.
Above embodiment described technical principles of the invention, and the description is merely to explain the principles of the invention, and
It cannot be construed to the limitation of the scope of the present invention in any way.Based on the explanation herein, those skilled in the art is not required to
Other specific embodiments of the invention can be associated by paying creative labor, these modes fall within of the invention
In protection scope.
Claims (10)
1. a kind of liquid crystal display die set test board characterized by comprising
Voltag driving circuit is electrically connected with the output end of power supply, and the Voltag driving circuit is used for the power supply electricity
The output voltage in source is converted to operating voltage required for each circuit on the liquid crystal display die set test board；
TF card storage circuit, required picture to be shown when for storing liquid crystal display die set test；
Usb circuit for downloading the picture to be shown by control USB port, and the picture to be shown is sent
It is powered in the TF card storage circuit, or by controlling the USB port to the liquid crystal display die set test board；
Program download interface circuit, for downloading control required when the liquid crystal display die set is tested by controlling download interface
Program；
Display module interface circuit, for connecting the liquid crystal display die set to be tested, and to the liquid crystal display die set into
The transmission of row data, the voltage output end of the display module interface circuit and the voltage output end of the Voltag driving circuit are electrical
Connection；
Main control unit, respectively with the TF card storage circuit, the usb circuit, described program download interface circuit and institute
It states and is electrically connected between display module interface circuit, the electricity of the voltage output end of the main control unit and the Voltag driving circuit
Output end is pressed to be electrically connected, the main control unit is used for the TF card storage circuit, the usb circuit, described program
The circuit state of download interface circuit and the display module interface circuit is controlled.
2. liquid crystal display die set test board according to claim 1, which is characterized in that the display module interface circuit with
Level shifting circuit is equipped between the main control unit, the level shifting circuit is used for the operation for exporting the main control unit
Voltage, which is converted to, shows voltage needed for the display module interface circuit.
3. liquid crystal display die set test board according to claim 2, which is characterized in that the level shifting circuit includes electricity
Flat conversion chip and respectively series connection be set to the electrical level transferring chip on 26,27,29,30,32,33,35,36,37,38,40,
41, the level conversion resistance on 43,44,46 and 47 pins, the model SN74AVC16T245 of the electrical level transferring chip, institute
The resistance value for stating level conversion resistance is 33R.
4. liquid crystal display die set test board according to claim 1, which is characterized in that the Voltag driving circuit includes electricity
Press driving chip and the 3rd resistor being electrically connected respectively with the voltage driver chips, the 4th resistance, the 5th resistance, the 6th electricity
Resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the second inductance, third inductance, the second capacitor, third capacitor,
Four capacitors, the 5th capacitor, the 6th capacitor, the 7th capacitor and the tenth capacitor are set between second inductance and the 9th resistance
There is the 8th capacitor, the 9th capacitor is equipped between the third inductance and the tenth resistance.
5. liquid crystal display die set test board according to claim 1, which is characterized in that the TF card storage circuit includes TF
Chip, the 30th resistance being electrically connected with the 2nd pin of TF chip, be electrically connected with the 3rd pin of TF chip the
31 resistance, the 32nd resistance being electrically connected with the 7th pin of TF chip and electrical with the 5th pin of TF chip
33rd resistance of connection, and the 30th resistance, the 31st resistance, the 32nd resistance and described the
The resistance value of 33 resistance is 100K.
6. liquid crystal display die set test board according to claim 1, which is characterized in that the usb circuit include with
The 19th resistance that the 3rd pin of USB port is electrically connected and the with the 2nd pin of USB port electric connection the 20th
Resistance, and series connection is equipped with LED light on the 19th pin and the 20th pin.
7. liquid crystal display die set test board according to claim 1, which is characterized in that described program download interface circuit packet
Include the 21st resistance being electrically connected respectively with the download interface, the 22nd resistance, the 23rd resistance, the 24th
Resistance, the 14th capacitor, the 15th capacitor, diode and reset key.
8. liquid crystal display die set test board according to claim 1, which is characterized in that the main control unit includes master control list
Piece machine and the twelfth resistor being electrically connected with the main control singlechip, thirteenth resistor, the 12nd capacitor and the 29th electricity
Hold, the model C8051F340 of the main control singlechip.
9. liquid crystal display die set test board according to claim 8, which is characterized in that the liquid crystal display die set test board
Further include key circuit, the key circuit include respectively with the main control singlechip be electrically connected beginning key and stopping by
Key, series connection is equipped with the 16th resistance on the input terminal for starting key, and series connection is equipped with the on the input terminal to stop key
The KEY-NEXT pin of 17 resistance, the 16th resistance and the main control singlechip is electrically connected, the 17th resistance
It is electrically connected with the KEY-STOP pin of the main control singlechip, and the resistance value of the 16th resistance and the 17th resistance
It is 1K.
10. liquid crystal display die set test board according to claim 8, which is characterized in that the display module interface circuit
Including the Serial Peripheral Interface (SPI) being electrically connected with the main control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910133950.4A CN109817132A (en) | 2019-02-22 | 2019-02-22 | Liquid crystal display die set test board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910133950.4A CN109817132A (en) | 2019-02-22 | 2019-02-22 | Liquid crystal display die set test board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109817132A true CN109817132A (en) | 2019-05-28 |
Family
ID=66607253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910133950.4A Withdrawn CN109817132A (en) | 2019-02-22 | 2019-02-22 | Liquid crystal display die set test board |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040227708A1 (en) * | 2003-05-16 | 2004-11-18 | Huelson Phillip Wayne | System and method for testing displays |
| CN203616547U (en) * | 2013-12-19 | 2014-05-28 | Tcl显示科技（惠州）有限公司 | Test system of liquid crystal display module |
| CN107578734A (en) * | 2017-08-29 | 2018-01-12 | 深圳市峰泳科技有限公司 | The generating means and production method of a kind of rgb signal |
| CN108172153A (en) * | 2017-12-27 | 2018-06-15 | 苏州华兴源创电子科技有限公司 | A kind of LCD module group aging test device and include its equipment |
| CN108490343A (en) * | 2018-05-22 | 2018-09-04 | 杭州博日科技有限公司 | The driver circuit board test aging equipment of PCR instrument |
-
2019
- 2019-02-22 CN CN201910133950.4A patent/CN109817132A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040227708A1 (en) * | 2003-05-16 | 2004-11-18 | Huelson Phillip Wayne | System and method for testing displays |
| CN203616547U (en) * | 2013-12-19 | 2014-05-28 | Tcl显示科技（惠州）有限公司 | Test system of liquid crystal display module |
| CN107578734A (en) * | 2017-08-29 | 2018-01-12 | 深圳市峰泳科技有限公司 | The generating means and production method of a kind of rgb signal |
| CN108172153A (en) * | 2017-12-27 | 2018-06-15 | 苏州华兴源创电子科技有限公司 | A kind of LCD module group aging test device and include its equipment |
| CN108490343A (en) * | 2018-05-22 | 2018-09-04 | 杭州博日科技有限公司 | The driver circuit board test aging equipment of PCR instrument |
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Application publication date: 20190528 |