CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority to Chinese Patent Application No. 202011384448.X, filed on Nov. 30, 2020, the content of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of display technologies, and particularly, to a display panel, a method for manufacturing the display panel, and a display device.

BACKGROUND

With continuous development of science and technology, more and more electronic devices having display functions are widely used in people's daily life and work, bringing great convenience and becoming an indispensable tool. A main component of the electronic device which realizes the display function is a display panel.

A visual test (VT) of the display panel is an important step in a production process of the display panel. The VT test refers to: after the display panel is manufactured, various signal lines including data lines and scan lines in the display panel are connected to corresponding test pads. Corresponding test signals are loaded to the respective test pads on the display panel via a test device so that the display panel displays images, thereby testing whether the structure including the signal lines in the display panel meets the quality requirements. The VT test may prevent defective products from entering the subsequent assembling step.

However, current VT test has a low accuracy and may not effectively test quality of the display panel.

SUMMARY

In view of the above, the present disclosure provides a display panel, a method for manufacturing the display panel, and a display device in order to improve accuracy of the VT test.

In a first aspect of the present disclosure, a display panel is provided. The display panel includes a display portion including a plurality of data lines; a test circuit including a test switch, a test signal line and a test control line, the test switch having a control terminal electrically connected to the test control line, a first terminal electrically connected to the test signal line, and a second terminal electrically connected to a respective one of the plurality of data lines; a display control circuit including a display switch, a display signal line and a display control line, the display switch having a control terminal electrically connected to the display control line, a first terminal electrically connected to the display signal line, and a second terminal electrically connected to a respective one of the plurality of data lines; and a selection circuit including a selection switch and a selection control line, the selection switch having a control terminal electrically connected to the selection control line, a first terminal electrically connected to a selection signal terminal, and a second terminal electrically connected to the display control line. The selection signal terminal is configured to provide a signal for turning off the display switch when the test switch and the selection switch are turned on.

In a second aspect of the present disclosure, a method for manufacturing a display panel is provided. The manufacturing method includes providing a substrate; forming a display portion including a plurality of data lines at a side of the substrate; and forming a test circuit, a display control circuit and a selection circuit at the same side of the substrate. The test circuit includes a test switch, a test signal line and a test control line, the test switch having a control terminal electrically connected to the test control line, a first terminal electrically connected to the test signal line, and a second terminal electrically connected to a respective one of the plurality of data lines; the display control circuit includes a display switch, a display signal line and a display control line, the display switch having a control terminal electrically connected to the display control line, a first terminal electrically connected to the display signal line, and a second terminal electrically connected to a respective one of the plurality of data lines; and the selection circuit includes a selection switch and a selection control line, the selection switch having a control terminal electrically connected to the selection control line, a first terminal electrically connected to a selection signal terminal, and a second terminal electrically connected to the display control line. The selection signal terminal is configured to provide a signal for turning off the display switch when the test switch and the selection switch are turned on; and testing the display panel.

In a third aspect of the present disclosure, a display device is provided. The display device includes a display panel, and the display panel includes: a display portion including a plurality of data lines; a test circuit including a test switch, a test signal line and a test control line, the test switch having a control terminal electrically connected to the test control line, a first terminal electrically connected to the test signal line, and a second terminal electrically connected to a respective one of the plurality of data lines; a display control circuit including a display switch, a display signal line and a display control line, the display switch having a control terminal electrically connected to the display control line, a first terminal electrically connected to the display signal line, and a second terminal electrically connected to a respective one of the plurality of data lines; and a selection circuit including a selection switch and a selection control line, the selection switch having a control terminal electrically connected to the selection control line, a first terminal electrically connected to a selection signal terminal, and a second terminal electrically connected to the display control line. The selection signal terminal is configured to provide a signal for turning off the display switch when the test switch and the selection switch are turned on.

In addition, in embodiments of the present disclosure, by configuring the selection circuit as a circuit structure including the selection switch, only a certain number of selection switches is required to be provided in the display panel, so that it is not necessary to provide a pad for providing signals to the display control line. At present, in order to ensure contact area between the pad and the subsequent chip to be bonded, area of the pad is usually provided large. Generally, the area of the pad is larger than the area of the selection switch. Therefore, compared with the solution of configuring a pad in the display panel to control the display switch to be turned off during the VT test, configuration of the present disclosure may ensure accuracy of the test result of the display panel, and may also avoid excessively increasing area of the non-display region in the display panel, thereby increasing the screen-to-body ratio of the display panel. Moreover, if an abnormality occurs in a subsequent assembling process, these pads may be used to quickly test so as to check the abnormality.

Moreover, in a manufacturing process of the display panel, a display mother board having a larger area is formed first. The display mother board includes a plurality of display panels with a smaller area as described above. In an embodiment of the present disclosure, by reducing the area occupied by the test pad on the display panel, the space saved may be arranged with more display panels when the area of the display motherboard is constant. In particular, for the display panel used in wearable devices, its integration degree on the display mother board is relatively high. By adopting the configuration according to the embodiments of the present disclosure, a layout rate of the display mother board may be improved, which is beneficial to reduce production cost.

