CN219891516U - Testing device and externally hung bias voltage circuit structure - Google Patents
Testing device and externally hung bias voltage circuit structure Download PDFInfo
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- CN219891516U CN219891516U CN202321731596.3U CN202321731596U CN219891516U CN 219891516 U CN219891516 U CN 219891516U CN 202321731596 U CN202321731596 U CN 202321731596U CN 219891516 U CN219891516 U CN 219891516U
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- capacitor
- resistor
- bias voltage
- triode
- liquid crystal
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 28
- 239000003990 capacitor Substances 0.000 claims description 30
- 239000003381 stabilizer Substances 0.000 claims description 13
- 230000017525 heat dissipation Effects 0.000 claims description 11
- 230000009977 dual effect Effects 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 6
- FPWNLURCHDRMHC-UHFFFAOYSA-N 4-chlorobiphenyl Chemical compound C1=CC(Cl)=CC=C1C1=CC=CC=C1 FPWNLURCHDRMHC-UHFFFAOYSA-N 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- NMWSKOLWZZWHPL-UHFFFAOYSA-N 3-chlorobiphenyl Chemical compound ClC1=CC=CC(C=2C=CC=CC=2)=C1 NMWSKOLWZZWHPL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a testing device and an externally-hung bias voltage circuit structure, which belong to the technical field of liquid crystal display screens, wherein the externally-hung bias voltage circuit structure comprises a liquid crystal display screen display part, an FPC board, a PCB board and circuit elements; the FPC board is connected with the display component of the liquid crystal display screen, the PCB board is connected with the FPC board, and the circuit element is arranged on the PCB board; according to the utility model, the original bias voltage plug-in of the liquid crystal display screen is paved on the PCB board through circuit design, the plug-in circuit uses conventional components such as resistance, capacitance and the like, the problem of the plug-in voltage component is easy to analyze and process, and the problem of the conventional built-in Driving IC is that the whole IC is scrapped once the failure occurs, and the specific failure cannot be detected; the utility model can enable the bias voltage in the liquid crystal display to normally operate at extreme ambient temperature.
Description
Technical Field
The utility model belongs to the technical field of liquid crystal display screens, and provides a testing device and an externally hung bias voltage circuit structure.
Background
A liquid crystal display, abbreviated as LCD, is one of flat panel displays, which uses two sheets of polarized material, between which is a liquid crystal solution that rearranges crystals when a current passes through the liquid so that light cannot pass through them, so that each crystal looks like a louver, allowing light to pass through but blocking light, and the current technological information products of Liquid Crystal Displays (LCDs) are all being developed toward light, thin, short, and small objects.
At present, electronic devices such as a tablet personal computer and a smart phone are usually used for high-definition display by using a liquid crystal display, a group of driving bias voltages are arranged in the liquid crystal display, consumer products such as a mobile phone and a tablet and the like in the market are driven by driving IC (integrated circuit) external output of an LCD (liquid crystal display), the requirements on the environment temperature of the consumer display are not high, the structural space is designed to be thin and integrated in the direction of the consumer, but when the device is applied to an automobile, the environment of the automobile in the use process is far worse than that of the consumer, the temperature of an object is lower than 30 ℃ in north in winter at low temperature, the temperature of an object reaches 60 ℃ after the sun is exploded in south at high temperature, and the driving IC external output bias voltage cannot normally run at extreme environment temperature.
Disclosure of Invention
Therefore, the present utility model is directed to a testing device and a plug-in bias voltage circuit structure, which can make the bias voltage in the liquid crystal display normally operate at extreme ambient temperature.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
in a first aspect, the present utility model provides an externally hung bias voltage circuit structure, including a liquid crystal display component, an FPC board, a PCB board, and a circuit element; the FPC board is connected with the display part of the liquid crystal display, the PCB board is connected with the FPC board, and the circuit element is arranged on the PCB board.
Further, the circuit element comprises a capacitor C1, a double diode D1, a capacitor C2, a triode Q1, a resistor R2, a resistor R3, a voltage stabilizer D2, a capacitor C3 and a TVS diode T1; pin 3 of the dual diode D1 is connected with the capacitor C1; one end of the capacitor C2 is connected with the pin 1 of the double diode D1, and the other end of the capacitor C is grounded; the collector electrode of the triode Q1 is connected with the capacitor C2; one end of the resistor R1 is connected with the collector electrode of the triode Q1, and the other end of the resistor R1 is connected with the base electrode of the triode Q1; one end of the resistor R2 is connected with the base electrode of the triode Q1; one end of the resistor R3 is connected with the resistor R2, and the other end of the resistor R3 is grounded; the anode of the voltage stabilizer D2 is connected with the base electrode of the triode Q1, the cathode of the voltage stabilizer D2 is grounded, and the reference end of the voltage stabilizer D2 is connected with the resistor R2; one end of the capacitor C3 is connected with the emitter of the triode Q1, and the other end of the capacitor C is grounded; one end of the TVS diode T1 is connected with the emitter of the triode Q1, and the other end of the TVS diode T1 is grounded; the dual diode D1 model uses BAT54S.
Further, the model D2 of the voltage stabilizer adopts TL431.
In a second aspect, the present utility model further provides a testing device, including a plug-in bias voltage circuit structure and a heat dissipation assembly; the heat dissipation assembly is arranged on the side edge of the PCB.
Further, the heat dissipation assembly comprises a mounting seat, a heat dissipation sheet, a heat conduction piece and two clamping plates; the mounting seat is fixedly connected with the PCB and is positioned at the side edge of the PCB; the radiating fin is positioned at the top of the mounting seat; the heat conducting piece is fixedly connected with the radiating fin and is positioned at one side of the radiating fin close to the PCB; the two clamping plates are fixedly connected with the radiating fins respectively and are positioned on two sides of the radiating fins.
The beneficial effects of the utility model are as follows:
1. the original bias voltage plug-in of the liquid crystal display screen is paved on the PCB through circuit design, the plug-in circuit uses conventional components such as resistance and capacitance, problems of the plug-in voltage components are easy to analyze and process, and the whole IC is scrapped once the existing mode of internally arranging the Driving IC fails, so that specific faults cannot be detected.
2. The original bias voltage of the liquid crystal display screen is externally paved on the PCB through circuit design, so that the bias voltage in the liquid crystal display screen can normally operate at extreme ambient temperature.
3. The heat dissipation assembly is arranged to dissipate heat of the PCB and the circuit element.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the overall structure of a plug-in bias voltage circuit according to the present utility model.
Fig. 2 is a schematic structural diagram of a circuit element according to the present utility model.
FIG. 3 is a schematic diagram of the whole structure of a testing device according to the present utility model.
Reference numerals: 1-LCD display part, 2-FPC board, 3-PCB board, 4-circuit component, 5-heat dissipation subassembly, 6-mount pad, 7-fin, 8-heat-conducting piece, 9-cardboard.
Detailed Description
The utility model is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
Fig. 1-2 show an overall schematic diagram of a plug-in bias voltage circuit structure according to the present utility model, and fig. 2 shows a schematic diagram of a circuit element according to the present utility model.
In a first aspect, the present utility model provides an externally hung bias voltage circuit structure, comprising a liquid crystal display component 1, an FPC board 2, a PCB board 3 and a circuit element 4; the circuit element 4 comprises a capacitor C1, a double diode D1, a capacitor C2, a triode Q1, a resistor R2, a resistor R3, a voltage stabilizer D2, a capacitor C3 and a TVS diode T1; through the scheme, the bias voltage in the liquid crystal display can normally operate at extreme ambient temperature.
For this embodiment, the FPC board 2 is connected to the lcd display unit 1, the PCB board 3 is connected to the FPC board 2, and the circuit element 4 is disposed on the PCB board 3. According to the utility model, the original bias voltage plug-in of the liquid crystal display screen is paved on the PCB 3 through circuit design, the plug-in circuit uses conventional components such as resistance and capacitance, and the problem of the plug-in voltage component is easy to analyze and process, and the problem of the existing built-in Driving IC once occurs, the whole IC is scrapped and a specific fault cannot be detected; the utility model can enable the bias voltage in the liquid crystal display to normally operate at extreme ambient temperature.
The circuit element 4 is disposed on the PCB 3, and the circuit element 4 includes a capacitor C1, a dual diode D1, a capacitor C2, a triode Q1, a resistor R2, a resistor R3, a voltage stabilizer D2, a capacitor C3, and a TVS diode T1; pin 3 of the dual diode D1 is connected with the capacitor C1; one end of the capacitor C2 is connected with the pin 1 of the double diode D1, and the other end of the capacitor C is grounded; the collector electrode of the triode Q1 is connected with the capacitor C2; one end of the resistor R1 is connected with the collector electrode of the triode Q1, and the other end of the resistor R1 is connected with the base electrode of the triode Q1; one end of the resistor R2 is connected with the base electrode of the triode Q1; one end of the resistor R3 is connected with the resistor R2, and the other end of the resistor R3 is grounded; the anode of the voltage stabilizer D2 is connected with the base electrode of the triode Q1, the cathode of the voltage stabilizer D2 is grounded, and the reference end of the voltage stabilizer D2 is connected with the resistor R2; one end of the capacitor C3 is connected with the emitter of the triode Q1, and the other end of the capacitor C is grounded; one end of the TVS diode T1 is connected with the emitting electrode of the triode Q1, and the other end of the TVS diode T is grounded.
The application principle of the utility model is as follows: according to the utility model, the original bias voltage plug-in of the liquid crystal display screen is paved on the PCB 3 through circuit design, the plug-in circuit uses conventional components such as resistance and capacitance, and the problem of the plug-in voltage component is easy to analyze and process, and the problem of the existing built-in Driving IC once occurs, the whole IC is scrapped and a specific fault cannot be detected; the utility model can enable the bias voltage in the liquid crystal display to normally operate at extreme ambient temperature.
In a second aspect, referring to fig. 3, fig. 3 is a schematic overall structure of a testing apparatus according to the present utility model.
The utility model also provides a testing device, which comprises an externally hung bias voltage circuit structure and a heat dissipation assembly 5; the heat dissipation assembly 5 comprises a mounting seat 6, a heat dissipation sheet 7, a heat conduction piece 8 and two clamping plates 9.
For this embodiment, the heat dissipation component 5 is disposed on a side of the PCB 3. The heat dissipation assembly 5 is capable of dissipating heat from the PCB 3 and the circuit element 4.
The mounting seat 6 is fixedly connected with the PCB 3 and is positioned at the side edge of the PCB 3; the radiating fins 7 are positioned at the top of the mounting seat 6; the heat conducting piece 8 is fixedly connected with the radiating fin 7 and is positioned on one side of the radiating fin 7 close to the PCB 3; the two clamping plates 9 are respectively and fixedly connected with the cooling fins 7 and are positioned on two sides of the cooling fins 7. The distance between two cardboard 9 with the width of mount pad 6 is the same, will cardboard 9 is arranged in mount pad 6 both sides can be so that will fin 7 is placed the mount pad 6 top, heat conduction spare 8 is silica gel, has elasticity, can laminate circuit component 4 surface, will the heat conduction that circuit component 4 during operation produced arrives on the fin 7, warp fin 7 is with the heat escape, avoid circuit component 4 damages because of the high temperature.
The application principle of the utility model is as follows: the original bias voltage plug-in of the liquid crystal display screen is paved on the PCB 3 through circuit design, the plug-in circuit uses conventional components such as resistance and capacitance, the problem of the plug-in voltage component is easy to analyze and process, and the problem of the existing built-in Driving IC is that the whole IC is scrapped once the failure occurs, and the specific failure cannot be detected; the utility model can enable the bias voltage in the liquid crystal display to normally operate at extreme ambient temperature; will cardboard 9 is arranged in mount pad 6 both sides can be so that with fin 7 is placed mount pad 6 top, heat conduction spare 8 is silica gel, has elasticity, can laminate circuit component 4 surface, will the heat conduction that circuit component 4 during operation produced arrives on the fin 7, warp fin 7 is with the heat is derived, avoid circuit component 4 damages because of the high temperature.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.
Claims (5)
1. The externally hung bias voltage circuit structure is characterized by comprising a liquid crystal display part, an FPC board, a PCB board and a circuit element; the FPC board is connected with the display part of the liquid crystal display, the PCB board is connected with the FPC board, and the circuit element is arranged on the PCB board.
2. The plug-in bias voltage circuit structure of claim 1, wherein the circuit elements include a capacitor C1, a dual diode D1, a capacitor C2, a transistor Q1, a resistor R2, a resistor R3, a voltage regulator D2, a capacitor C3, and a TVS diode T1; pin 3 of the dual diode D1 is connected with the capacitor C1; one end of the capacitor C2 is connected with the pin 1 of the double diode D1, and the other end of the capacitor C is grounded; the collector electrode of the triode Q1 is connected with the capacitor C2; one end of the resistor R1 is connected with the collector electrode of the triode Q1, and the other end of the resistor R1 is connected with the base electrode of the triode Q1; one end of the resistor R2 is connected with the base electrode of the triode Q1; one end of the resistor R3 is connected with the resistor R2, and the other end of the resistor R3 is grounded; the anode of the voltage stabilizer D2 is connected with the base electrode of the triode Q1, the cathode of the voltage stabilizer D2 is grounded, and the reference end of the voltage stabilizer D2 is connected with the resistor R2; one end of the capacitor C3 is connected with the emitter of the triode Q1, and the other end of the capacitor C is grounded; one end of the TVS diode T1 is connected with the emitter of the triode Q1, and the other end of the TVS diode T1 is grounded; the dual diode D1 model uses BAT54S.
3. The structure of claim 2, wherein the regulator D2 is TL431.
4. A test device comprising a plug-in bias voltage circuit structure according to any one of claims 1-3, further comprising a heat sink assembly; the heat dissipation assembly is arranged on the side edge of the PCB.
5. The test device of claim 4, wherein the heat sink assembly comprises a mounting base, a heat sink, a heat conducting member, and two clamping plates; the mounting seat is fixedly connected with the PCB and is positioned at the side edge of the PCB; the radiating fin is positioned at the top of the mounting seat; the heat conducting piece is fixedly connected with the radiating fin and is positioned at one side of the radiating fin close to the PCB; the two clamping plates are fixedly connected with the radiating fins respectively and are positioned on two sides of the radiating fins.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321731596.3U CN219891516U (en) | 2023-07-04 | 2023-07-04 | Testing device and externally hung bias voltage circuit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321731596.3U CN219891516U (en) | 2023-07-04 | 2023-07-04 | Testing device and externally hung bias voltage circuit structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219891516U true CN219891516U (en) | 2023-10-24 |
Family
ID=88408294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321731596.3U Active CN219891516U (en) | 2023-07-04 | 2023-07-04 | Testing device and externally hung bias voltage circuit structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219891516U (en) |
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2023
- 2023-07-04 CN CN202321731596.3U patent/CN219891516U/en active Active
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