CN207780176U - A kind of test circuit system for LCD display mainboard - Google Patents
A kind of test circuit system for LCD display mainboard Download PDFInfo
- Publication number
- CN207780176U CN207780176U CN201820119742.XU CN201820119742U CN207780176U CN 207780176 U CN207780176 U CN 207780176U CN 201820119742 U CN201820119742 U CN 201820119742U CN 207780176 U CN207780176 U CN 207780176U
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- China
- Prior art keywords
- lcd display
- harmonic
- capacitance
- mcu
- circuit system
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- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004088 simulation Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000003739 neck Anatomy 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The utility model is related to LCD display equipment technical fields, especially a kind of test circuit system for LCD display mainboard.Including MCU, LCD module, RC oscillating circuits, individually control switch, multi-harmonic-oscillations circuit and button, LCD module, RC oscillating circuits, individually control switch, multi-harmonic-oscillations circuit and button are all connected with MCU, RC oscillating circuits are separately connected measured resistance and measured capacitance, the connection of multi-harmonic-oscillations circuit is tested inductance, and RC oscillating circuits and multi-harmonic-oscillations circuit are all connected with individually control switch.The utility model advantageous effect：The utility model is provided with MCU, LCD module, RC oscillating circuits, individually control switch, multi-harmonic-oscillations circuit and button, and LCD module is separately connected backlight and inverter circuit, and test significant effect is simple in structure, securely and reliably.
Description
Technical field
The utility model is related to LCD display equipment technical fields, especially a kind of test for LCD display mainboard
Circuit system.
Background technology
LCD source drivers can have many channels (for example, 256-1024).The channel (channel) is to channel offset
The variation of voltage is estimated to be only limitted to particular voltage level, e.g., is less than +/- 5mV.The channel to channel offset voltage change system is not using
It is tested with test method.
The shortcoming that the conventional tester of LCD source drivers has includes：When TCH test channel or using accurate
There is higher testing cost when AD converter (ADC).Using with more accurate high-resolution and compared with multichannel
Tester compared with a kind of special mixed mode (for example, analog- and digital-) of high pin number is very expensive.In addition, in order to survey
Examination, tester use the multiplexing switch for sharing an ADC, it is therefore desirable to expensive multiplexing switch, and the testing time is very long, this
Testing cost and handling capacity will be increased.
Therefore, for the above problem, it is necessary to propose a kind of test circuit system for LCD display mainboard.
Utility model content
The utility model aim is to overcome deficiency in the prior art, is provided a kind of for LCD display mainboard
Test circuit system.
In order to solve the above-mentioned technical problem, the utility model is achieved through the following technical solutions：
A kind of test circuit system for LCD display mainboard, including MCU, LCD module, RC oscillating circuits, individually control
System switch, multi-harmonic-oscillations circuit and button, the LCD module, RC oscillating circuits, individually control switch, multi-harmonic-oscillations circuit and
Button is all connected with MCU, and the RC oscillating circuits are separately connected measured resistance and measured capacitance, and the multi-harmonic-oscillations circuit connects quilt
Inductance is surveyed, the RC oscillating circuits and multi-harmonic-oscillations circuit are all connected with individually control switch.
Preferably, the LCD module is separately connected backlight and inverter circuit.
Preferably, the MCU is also connected with digital DVI-interface, simulation USB interface and power conversion module.
Preferably, the MCU uses AT98C52 microcontrollers.
Preferably, the RC oscillating circuits include amplifier, the first capacitance, first resistor, second resistance, 3rd resistor and
4th resistance.
Preferably, the inverting input of the amplifier connects the output end of amplifier by first resistor and passes through second
Resistance eutral grounding, the in-phase input end of the amplifier is separately connected one end of the first capacitance, the second capacitance, 3rd resistor, described
Second capacitance and the other end of 3rd resistor are grounded, and the other end of first capacitance connects amplifier by the 4th resistance
Output end.
The utility model advantageous effect：The utility model is provided with MCU, LCD module, RC oscillating circuits, individually controls and open
Pass, multi-harmonic-oscillations circuit and button, LCD module are separately connected backlight and inverter circuit, test significant effect, simple in structure,
Securely and reliably.
The technique effect of the design of the utility model, concrete structure and generation is made furtherly below with reference to attached drawing
It is bright, to be fully understood from the purpose of this utility model, feature and effect.
Description of the drawings
Fig. 1 is the structure diagram of the utility model；
Fig. 2 is the body temperature transducer circuit diagram of the utility model.
Specific implementation mode
The embodiments of the present invention are described in detail below in conjunction with attached drawing, but the utility model can be by right
It is required that the multitude of different ways for limiting and covering is implemented.
Such as Fig. 1 is simultaneously combined shown in Fig. 2, a kind of test circuit system for LCD display mainboard, including MCU, LCD mould
Block, RC oscillating circuits, individually control switch, multi-harmonic-oscillations circuit and button, the LCD module, RC oscillating circuits, individually control
Switch, multi-harmonic-oscillations circuit and button are all connected with MCU, and the RC oscillating circuits are separately connected measured resistance and measured capacitance, institute
It states the connection of multi-harmonic-oscillations circuit and is tested inductance, the RC oscillating circuits and multi-harmonic-oscillations circuit are all connected with individually control switch.
Further, the LCD module is separately connected backlight and inverter circuit, and the MCU is also connected with digital DVI and connects
Mouth, simulation USB interface and power conversion module.
Wherein, the MCU uses AT98C52 microcontrollers
The RC oscillating circuits include amplifier Q1, the first capacitance C1, first resistor R1, second resistance R2,3rd resistor
R3 and the 4th resistance R4.
Preferably, the inverting input of the amplifier Q1 passes through the output end of first resistor R1 connection amplifiers Q1 and logical
Second resistance R2 ground connection is crossed, the in-phase input end of the amplifier Q1 is separately connected the first capacitance C1, the second capacitance C2, third electricity
The other end of one end of resistance R2, the second capacitance C2 and 3rd resistor R3 are grounded, and the other end of the first capacitance C1 is logical
Cross the output end of the 4th resistance R4 connection amplifiers Q1.
The utility model be provided with MCU, LCD module, RC oscillating circuits, individually control switch, multi-harmonic-oscillations circuit and by
Key, LCD module are separately connected backlight and inverter circuit, test significant effect, simple in structure, securely and reliably.
The preferred embodiment of the utility model described in detail above.It should be appreciated that the ordinary skill people of this field
Member according to the present utility model can conceive without creative work makes many modifications and variations.Therefore, all this technology necks
Technical staff passes through logic analysis, reasoning or limited reality on the basis of existing technology according to the design of the utility model in domain
Available technical solution is tested, it all should be in the protection domain being defined in the patent claims.
Claims (6)
1. a kind of test circuit system for LCD display mainboard, it is characterised in that：Including MCU, LCD module, RC oscillation electricity
Road, individually control switch, multi-harmonic-oscillations circuit and button, the LCD module, RC oscillating circuits, individually control switch, multi-resonant
It swings circuit and button is all connected with MCU, the RC oscillating circuits are separately connected measured resistance and measured capacitance, and the multi-harmonic-oscillations return
Road connection is tested inductance, and the RC oscillating circuits and multi-harmonic-oscillations circuit are all connected with individually control switch.
2. a kind of test circuit system for LCD display mainboard as described in claim 1, it is characterised in that：The LCD
Module is separately connected backlight and inverter circuit.
3. a kind of test circuit system for LCD display mainboard as described in claim 1, it is characterised in that：The MCU
It is also connected with digital DVI-interface, simulation USB interface and power conversion module.
4. a kind of test circuit system for LCD display mainboard as described in claim 1, it is characterised in that：The MCU
Using AT98C52 microcontrollers.
5. a kind of test circuit system for LCD display mainboard as described in claim 1, it is characterised in that：The RC
Oscillating circuit includes amplifier, the first capacitance, first resistor, second resistance, 3rd resistor and the 4th resistance.
6. a kind of test circuit system for LCD display mainboard as claimed in claim 5, it is characterised in that：It is described to put
The inverting input of big device connects the output end of amplifier by first resistor and is grounded by second resistance, the amplifier
In-phase input end is separately connected one end of the first capacitance, the second capacitance, 3rd resistor, second capacitance and 3rd resistor it is another
One end is grounded, and the other end of first capacitance connects the output end of amplifier by the 4th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820119742.XU CN207780176U (en) | 2018-01-24 | 2018-01-24 | A kind of test circuit system for LCD display mainboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820119742.XU CN207780176U (en) | 2018-01-24 | 2018-01-24 | A kind of test circuit system for LCD display mainboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207780176U true CN207780176U (en) | 2018-08-28 |
Family
ID=63211208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820119742.XU Active CN207780176U (en) | 2018-01-24 | 2018-01-24 | A kind of test circuit system for LCD display mainboard |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207780176U (en) |
-
2018
- 2018-01-24 CN CN201820119742.XU patent/CN207780176U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240219 Address after: 421200 Building 8, Shuangchuang Center, Xidu High tech Zone, Xidu Town, Hengyang County, Hengyang City, Hunan Province, China Patentee after: Shanglin Technology (Hengyang) Co.,Ltd. Country or region after: China Address before: 4th Floor, Factory Building, Yuxin Science and Technology Park, Longshan Seventh Road, Dayawan West District, Huizhou City, Guangdong Province, 516000 Patentee before: HUIZHOU SHANGLIN KECHUANG ELECTRONIC CO.,LTD. Country or region before: China |
|
| TR01 | Transfer of patent right |