CN114019265B - PM module screen wire plug-in detection circuit - Google Patents
PM module screen wire plug-in detection circuit Download PDFInfo
- Publication number
- CN114019265B CN114019265B CN202111114916.6A CN202111114916A CN114019265B CN 114019265 B CN114019265 B CN 114019265B CN 202111114916 A CN202111114916 A CN 202111114916A CN 114019265 B CN114019265 B CN 114019265B
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- resistor
- module
- screen wire
- screen
- detection circuit
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- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 25
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to the field of screen detection, in particular to a PM module screen wire plug-in detection circuit which comprises a PM module and a screen wire, wherein an enabling end of the PM module is connected with an FB loop of the screen wire. The invention has the beneficial effects that: according to the invention, the enabling end of the PM module is connected to the FB loop of the screen wire, and under the condition that the screen wire is not spliced/the screen wire is dropped/the screen wire is spliced and misplaced, the enabling function pin of the PM module is not normally pulled up, and the PM module does not output various voltages for driving the screen, so that the effect of protecting the circuit is achieved.
Description
Technical Field
The invention relates to the field of screen detection, in particular to a PM module screen wire plug-in detection circuit.
Background
With the progress of display technology, TCONLESS display screens are appeared on the market in order to further reduce the production cost of televisions. TCONLESS the display screen is removed from the traditional liquid crystal display screen TCON module, so that the production cost of the display screen is reduced. In recent years, all television main chip design manufacturers also actively integrate the functions of the TCON module into the television main chip, so that the production cost of the whole television can be further reduced.
The TCONLESS display screen directly transmits a screen driving logic signal by means of the SOC, and most TCONLESS schemes are connected to the screen from a main board by two FFC connecting wires, and the TCONLESS display screen needs to input 10V-30V VGH, AVDD and other voltages from the main board to the screen at the same time. When the screen wire is not firmly connected in the engineering, the misplacement of the connection can lead to screen burning or burn out the power supply device of the main board.
Disclosure of Invention
In order to solve the problem of screen burn-in of a mainboard caused by the fact that a screen is not old in plugging or is wrong in plugging, the invention provides a PM module screen plugging detection circuit, which comprises the following specific schemes:
a PM module screen wire plug-in detection circuit comprises a PM module and a screen wire, wherein an enabling end of the PM module is connected with an FB loop of the screen wire.
Specifically, the capacitor C1 and C2 and the resistor R1, R2 and R3 are also included; one end of the resistor R2 and one end of the resistor R3 are respectively connected with the FB input end and the FB output end of the screen wire; the other end of the resistor R2 is connected with R1; the other end of the resistor R3 is connected with the PM module enabling end; the terminal VDC_3v3 is connected with the resistor R1, one end of the capacitor C1 is connected with the terminal VDC_3v3, the other end of the capacitor C2 is grounded, and the other end of the capacitor C2 is connected with the PM module enabling end.
Specifically, resistor R4 is also included, resistor R4 being connected between resistor R3 and resistor R2.
Specifically, the power supply is connected to ground through resistors R5 and R6, and the vdc_3v3 terminal is connected to the paths between the resistors R5 and R6.
The invention has the beneficial effects that:
(1) According to the invention, the enabling end of the PM module is connected to the FB loop of the screen wire, and under the condition that the screen wire is not spliced/the screen wire is dropped/the screen wire is spliced and misplaced, the enabling function pin of the PM module is not normally pulled up, and the PM module does not output various voltages for driving the screen, so that the effect of protecting the circuit is achieved.
(2) By setting the resistor R4, when the point screen does not support the FB loop to enable, the enabling end can be pulled up directly from the main board end.
(3) Through setting up R5, R6, when PM module does not have inside LDO, can follow the 12V end power supply of mainboard, get the electricity through the resistance partial pressure, generate VDC_3V3 through R5 and R6 partial pressure.
(4) When the FB pins of the interfaces XPCB on the left and right sides of the screen are distributed asymmetrically, for example, XPCB-L adopts 2&60 pins, XPCB-R adopts 1&60 pins, and whether the screen wires are reversely connected can be detected.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic circuit diagram of embodiment 1;
FIG. 2 is a schematic circuit diagram of embodiment 2;
FIG. 3 is a schematic circuit diagram of embodiment 3;
Fig. 4 is a schematic circuit diagram of embodiment 4.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention discloses a PM module screen wire plug-in detection circuit, which comprises the following specific embodiments:
Example 1
As shown in FIG. 1, a PM module screen wire plug-in detection circuit comprises a PM module, a screen wire, capacitors C1 and C2 and resistors R1, R2 and R3; one end of the resistor R2 and one end of the resistor R3 are respectively connected with the FB input end and the FB output end of the screen wire; the other end of the resistor R2 is connected with the resistor R1; the other end of the resistor R3 is connected with the PM module enabling end; the VDC_3v3 terminal is connected with the resistor R1 and the resistor R2, one end of the capacitor C1 is connected with the other end of the VDC_3v3 terminal and grounded, and one end of the capacitor C2 is connected with the PM module enabling end and the other end is grounded.
Example 2
As shown in FIG. 2, the PM module screen wire plug-in detection circuit comprises a PM module, a screen wire, capacitors C1 and C2, resistors R1, R2, R3 and R4, wherein one end of the resistor R2 and one end of the resistor R3 are respectively connected with an FB input end and an FB output end of the screen wire; the other end of the resistor R2 is connected with the resistor R1; the other end of the resistor R3 is connected with the PM module enabling end; the VDC_3v3 terminal is connected with the resistor R1 and the resistor R2, one end of the capacitor C1 is connected with the VDC_3v3 terminal, the other end of the capacitor C2 is grounded, one end of the capacitor C2 is connected with the PM module enabling end, the other end of the capacitor C2 is grounded, and the reserved resistor R4 is connected between the resistor R3 and the resistor R2, so that PM can work normally when debugging without screen connection is facilitated.
Example 3
As shown in FIG. 3, the PM module screen wire plug-in detection circuit comprises a PM module, a screen wire, capacitors C1 and C2, resistors R1, R2, R3, R5 and R6, wherein one ends of the resistor R2 and the resistor R3 are respectively connected with an FB input end and an FB output end of the screen wire; the other end of the resistor R2 is connected with the resistor R1; the other end of the resistor R3 is connected with the PM module enabling end; the terminal VDC_3v3 is connected with the resistor R1 and the resistor R2, one end of the capacitor C1 is connected with the terminal VDC_3v3, the other end of the capacitor C2 is grounded, one end of the capacitor C2 is connected with the enabling end of the PM module, the other end of the capacitor C2 is grounded, the power supply is connected with the ground through the resistors R5 and R6, and the terminal VDC_3v3 is connected with a passage between the resistor R5 and the resistor R6.
Example 4
As shown in FIG. 4, the PM module screen wire plug-in detection circuit comprises a PM module, a screen wire, capacitors C1 and C2, resistors R1, R2, R3, R4, R5 and R6, wherein one end of the resistor R2 and one end of the resistor R3 are respectively connected with an FB input end and an FB output end of the screen wire; the other end of the resistor R2 is connected with the resistor R1; the other end of the resistor R3 is connected with the PM module enabling end; the VDC_3v3 terminal is connected with the resistor R1 and the resistor R2, one end of the capacitor C1 is connected with the VDC_3v3 terminal, the other end of the capacitor C2 is grounded, one end of the capacitor C2 is connected with the PM module enabling end, the other end of the capacitor C2 is grounded, the reserved resistor R4 is connected between the resistor R3 and the resistor R2, PM can work normally when the screen is not connected for debugging conveniently, the power supply is connected with the ground through the resistors R5 and R6, and the VDC_3v3 terminal is connected with the resistor R5 and the resistor R6 through a passage.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. The PM module screen wire plug-in detection circuit is characterized by comprising a PM module, a screen wire and capacitors C1 and C2; the enabling end of the PM module is connected with the FB loop of the screen wire; resistors R1, R2, R3; one end of the resistor R2 and one end of the resistor R3 are respectively connected with the FB input end and the FB output end of the screen wire; the other end of the resistor R2 is connected with R1; the other end of the resistor R3 is connected with the PM module enabling end; the VDC_3v3 terminal is connected with the resistor R2 through the resistor R1, one end of the capacitor C1 is connected with the other end of the VDC_3v3 terminal and grounded, and one end of the capacitor C2 is connected with the PM module enabling end and the other end is grounded.
2. The PM module line plug detection circuit according to claim 1, further comprising a resistor R4, the resistor R4 being connected between the resistor R3 and the resistor R2.
3. A PM module line plug detection circuit according to claim 1 or 2, further comprising resistors R5, R6, wherein the power supply is connected to ground through the resistors R5, R6, and the vdc_3v3 terminal is connected to a path between the resistors R5, R6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111114916.6A CN114019265B (en) | 2021-09-23 | 2021-09-23 | PM module screen wire plug-in detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111114916.6A CN114019265B (en) | 2021-09-23 | 2021-09-23 | PM module screen wire plug-in detection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN114019265A CN114019265A (en) | 2022-02-08 |
| CN114019265B true CN114019265B (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111114916.6A Active CN114019265B (en) | 2021-09-23 | 2021-09-23 | PM module screen wire plug-in detection circuit |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0301254A2 (en) * | 1987-07-30 | 1989-02-01 | Siemens Aktiengesellschaft | Measuring voltage with an electron probe by measuring in the frequency region with a modulated primary beam |
| CN103108461A (en) * | 2013-01-24 | 2013-05-15 | 珠海市蓝德节能科技有限公司 | Light-emitting diode (LED) color temperature adjusting device |
| CN209215599U (en) * | 2018-11-26 | 2019-08-06 | 云南云上云大数据产业发展有限公司 | A kind of handheld metal detector identifying shape |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7916127B2 (en) * | 2006-02-27 | 2011-03-29 | Texas Instruments Incorporated | Method and circuitry for self testing of connectivity of touch screen panel |
-
2021
- 2021-09-23 CN CN202111114916.6A patent/CN114019265B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0301254A2 (en) * | 1987-07-30 | 1989-02-01 | Siemens Aktiengesellschaft | Measuring voltage with an electron probe by measuring in the frequency region with a modulated primary beam |
| CN103108461A (en) * | 2013-01-24 | 2013-05-15 | 珠海市蓝德节能科技有限公司 | Light-emitting diode (LED) color temperature adjusting device |
| CN209215599U (en) * | 2018-11-26 | 2019-08-06 | 云南云上云大数据产业发展有限公司 | A kind of handheld metal detector identifying shape |
Non-Patent Citations (1)
| Title |
|---|
| 一种新型LED显示模组供电拓扑;任兴业;;电子设计工程(08);全文 * |
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| Publication number | Publication date |
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| CN114019265A (en) | 2022-02-08 |
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