Display panel and detection method thereof, flexible circuit board and display device

Abstract

The invention discloses a display panel and a detection method thereof, a flexible circuit board and a display device. A second binding area in the flexible circuit board comprises a plurality of contact pads and at least one test pad group, wherein the plurality of contact pads are used for being bound to a plurality of corresponding contact electrodes in a first binding area; each test pad groupis used for being bound to a corresponding test electrode group in the first binding area and comprises a plurality of test pads; the test pads are used for being bound to corresponding test electrodes; and the test pad groups are also used for judging the binding state of the plurality of contact pads and the plurality of contact electrodes through detecting the on-off states between the test pads and the corresponding test electrodes after the first binding area is bound to the second binding area. According to the flexible circuit board disclosed by the embodiment of the invention, the binding effect can be effectively and quickly detected through arranging the test pad groups in the second binding area and binding the flexible circuit board and the display panel.

Description

Technical field [0001] The invention relates to the field of display technology, in particular to a display panel, a detection method thereof, a flexible circuit board and a display device. Background technique [0002] With the continuous development of display technology, display screens or touch screens have been widely used in people’s lives. Among them, liquid crystal displays (LCD) have the characteristics of small size, low power consumption, and no radiation. Organic electroluminescent devices (Organic Light-Emitting Diode, OLED) has the advantages of self-luminescence, fast response, wide viewing angle, high brightness, bright colors, thin and light. [0003] In the prior art, the bonding area of ​​the display panel includes a plurality of contact electrodes (pads), and the bonding area on the flexible circuit board includes a plurality of contact pads (pins). The bonding process of the display screen or the touch screen, Generally, it is necessary to bind the contact pad...

AI Technical Summary

Problems solved by technology

However, the bonding process is usually due to improper conditions such as temperature, pressure, and alignment process. After bonding, some or all of the contact electrodes on the display panel and the contact pads on the flexible circuit board will be open, or adjacent contacts will appear. Electrode or adjacent contact pad short circuit

[0004] Usually, some components, such as diodes, can be welded in the component area on the FPC. The FPC with components welded can be expressed as FPCA (Flexible Printed Circuit Assembly). After binding the display panel and the flexible circuit board, for components with components The flexible circuit board (FPCA) of the device cannot judge the binding state by testing the channel resistance. Even a simple FPC without components needs to use a multimeter to tie the contact pads (also called golden fingers) on the flexible circuit board. To judge the binding effect, this way of detecting the binding effect is very easy to puncture the contact pad

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