System for detecting effective capacitance value of capacitor on module FPC

Abstract

The invention discloses a module FPC capacitor effective capacitance value detection system, which comprises an MCU module, a power supply module, a probe module, a capacitance value test module, an FPC capacitor bank module and a display module, and is characterized in that the power supply module, the probe module, the capacitance value test module, the FPC capacitor bank module and the display module are electrically connected with the MCU module; the probe module is electrically connected with the capacitance value test module and the power supply module. According to the invention, the actual capacitance value of the capacitor on the module FPC can be detected, the display effect of the module is prevented from being influenced by batch capacitance value difference or capacitor process fluctuation of the capacitor, and the yield of the module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display modules, and in particular to a system for detecting the effective capacitance of capacitors on a module FPC. Background Art

[0002] There are many capacitors on the display module's FPC, which serve as signal or power supply voltage stabilizers and filters. The current method for selecting capacitor capacitance is to select based on the reference capacitance on the module driver IC application schematic. This capacitance is the nominal capacitance of the capacitor under ideal conditions. When the actual module FPC is operating, after a DC operating voltage is applied across the capacitor, the actual capacitance will also decrease nonlinearly with the applied DC voltage, and there is a problem of being less than the minimum value required by the IC, which will cause the module to display abnormally or go black. Currently, for capacitors on FPCs, only the nominal capacitance is tested through ICT to ensure that it meets the specification requirements. It is impossible to test the effective capacitance of the capacitor working in the corresponding circuit. There is a risk that the effective capacitance will be less than the minimum value required by the IC, resulting in abnormal module display or a black screen.

[0003] Therefore, the existing technology has defects and needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a system for detecting the effective capacitance of capacitors on a module FPC.

[0005] The technical solution of the present invention is as follows: The present invention provides a module FPC capacitor effective capacitance detection system, comprising: an MCU module, a power module, a probe module, a capacitance test module, an FPC capacitance library module, and a display module, wherein the power module, the probe module, the capacitance test module, the FPC capacitance library module, and the display module are electrically connected to the MCU module respectively, and the probe module is electrically connected to the capacitance test module and the power module;

[0006] The power supply module is used to supply power to the MCU module and the probe module. The FPC capacitor library module is used to store the capacitor position and capacitor specification information of the module FPC. The MCU module is used for data processing and calculation. The probe module includes a driving component and several groups of capacitor probes. Each group of capacitor probes is used to electrically connect the capacitors on the FPC. The driving component is used to drive the capacitor probes to move. The capacitance test module is used to detect the capacitance of the capacitors connected to the probe module. The display module is used for information display and human-computer interaction.

[0007] During operation, the module FPC is placed on the detection system, and the model of the corresponding module FPC is selected by touching on the display module for detection. The MCU module retrieves the position and capacitance specification information of the capacitor of the module FPC from the FPC capacitance library module according to the model of the module FPC, controls the probe module to move to the position of the capacitor to be tested, and measures the capacitance to be tested through the probe module. The capacitance test module detects the actual effective capacitance of the capacitor and sends the data to the MCU module for comparison. The MCU module determines whether the actual effective capacitance of all capacitors is greater than or equal to the corresponding predetermined minimum capacitance. If so, it determines that the capacitance detection on the module FPC is qualified.

[0008] Furthermore, the probe module includes 16 groups of probe units, which can detect 16 capacitors at the same time.

[0009] Furthermore, the detection voltage output by the power module ranges from 0.1V to 30V, and can achieve a voltage regulation step of 0.1V.

[0010] By adopting the above scheme, the beneficial effect of the present invention is that it can detect the actual capacitance of the capacitor on the module FPC, avoid affecting the display effect of the module due to batch capacitance differences of capacitors or fluctuations in the capacitor manufacturing process, and improve the module yield. DETAILED DESCRIPTION

[0011] The present invention is described in detail below with reference to specific embodiments.

[0012] In this embodiment, the present invention provides a module FPC capacitor effective capacitance detection system, including: an MCU module, a power module, a probe module, a capacitance test module, an FPC capacitor library module and a display module, wherein the power module, the probe module, the capacitance test module, the FPC capacitor library module and the display module are electrically connected to the MCU module respectively, and the probe module is electrically connected to the capacitance test module and the power module.

[0013] The power supply module is used to power the MCU module and the probe module, and is used to provide the working voltage required by the test system, as well as the voltage for capacitance detection. It can achieve constant voltage output, and the output detection voltage range is 0.1V-30V, and can achieve a voltage adjustment step of 0.1V. The FPC capacitor library module is used to store the capacitor position and capacitor specification information of the module FPC, where the capacitor specification information includes: maximum working power supply, minimum effective capacitance, capacitor label and other information. The MCU module is used for data processing and calculation. The probe module includes a driving component and 16 groups of capacitor probes. Each group of capacitor probes is used to electrically connect the capacitors on the FPC, and can achieve simultaneous testing of 16 capacitors. The driving component is used to drive the capacitance probe to move. The capacitance test module is used to detect the capacitance of the capacitor connected to the probe module. The display module is used for information display and human-computer interaction.

[0014] According to the schematic diagram of the module FPC and the specification requirements of the module driver IC, a capacitance library file of the module FPC is prepared in advance, and the relevant data is pre-stored in the FPC capacitance library module. During operation, the module FPC is placed on the detection system, and the model of the corresponding module FPC is selected by touching on the display module for detection. The MCU module retrieves the position and capacitance specification information of the capacitor of the module FPC from the FPC capacitance library module according to the model of the module FPC, controls the movement of the probe module to the position of the capacitor to be tested, and measures the capacitance to be tested through the probe module. The capacitance test module detects the actual effective capacitance of the capacitor and sends the data to the MCU module for comparison. The MCU module determines whether the actual effective capacitance of all capacitors is greater than or equal to the corresponding predetermined minimum capacitance. If so, it determines whether the capacitance of the module FPC is greater than or equal to the corresponding predetermined minimum capacitance. The capacitance test is qualified, and the display module displays the information that the test has passed; if the actual effective capacitance of the capacitor is less than its predetermined minimum capacitance, the display module displays the information that the test has failed, and displays the relevant information of the capacitor that exceeds the standard, and re-inspection is performed once. During the re-inspection, the effective capacitance of all capacitors will be tested and compared again. If the actual effective capacitance of all capacitors is greater than or equal to the corresponding predetermined minimum capacitance at this time, it is judged that the capacitance test on the module FPC is qualified, and the display module displays the information that the test has passed. If there is still a situation where the effective capacitance of the capacitor is less than the predetermined minimum capacitance at this time, it means that the module FPC test has failed, and the display module will display the corresponding information.

[0015] In summary, the beneficial effects of this solution are: realizing the detection of the actual capacitance of the capacitor on the module FPC, avoiding the impact of the module's display effect due to batch capacitance differences or capacitor process fluctuations, and improving the module yield.

[0016] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A system for detecting the effective capacitance of capacitors on a module FPC, characterized in that: include: MCU module, power module, probe module, capacitance test module, FPC capacitor library module and display module, the power module, probe module, capacitance test module, FPC capacitor library module and display module are electrically connected to the MCU module respectively, and the probe module is electrically connected to the capacitance test module and the power module; The power supply module is used to supply power to the MCU module and the probe module. The FPC capacitor library module is used to store the capacitor position and capacitor specification information of the module FPC. The MCU module is used for data processing and calculation. The probe module includes a driving component and several groups of capacitor probes. Each group of capacitor probes is used to electrically connect the capacitors on the FPC. The driving component is used to drive the capacitor probes to move. The capacitance test module is used to detect the capacitance of the capacitors connected to the probe module. The display module is used for information display and human-computer interaction. During operation, the module FPC is placed on the detection system, and the model of the corresponding module FPC is selected by touching on the display module for detection. The MCU module retrieves the position and capacitance specification information of the capacitor of the module FPC from the FPC capacitance library module according to the model of the module FPC, controls the probe module to move to the position of the capacitor to be tested, and measures the capacitance to be tested through the probe module. The capacitance test module detects the actual effective capacitance of the capacitor and sends the data to the MCU module for comparison. The MCU module determines whether the actual effective capacitance of all capacitors is greater than or equal to the corresponding predetermined minimum capacitance. If so, it determines that the capacitance detection on the module FPC is qualified.

2. The effective capacitance detection system for capacitors on module FPC according to claim 1, characterized in that: The probe module includes 16 groups of probe units and can detect 16 capacitors at the same time.

3. The effective capacitance detection system for capacitors on a module FPC according to claim 1 or 2, characterized in that: The detection voltage output by the power module ranges from 0.1V to 30V, and can achieve a voltage regulation step of 0.1V.