Abstract: A head up display system, including: a display screen used for displaying an image; an imaging lens arranged on a light exit side of the display screen and used for imaging an image displayed on the display screen; and a curved reflecting mirror arranged on the side of the imaging lens facing away from the display screen and used for receiving imaging light of the imaging lens and reflecting said light to the position where human eyes are located. Relative positions of the display screen and the imaging lens are fixed, and the imaging lens and the curved reflecting mirror adopt a separate structure.

Abstract: The present invention is mainly related to a virtual reality all-in-one apparatus. The virtual reality all-in-one apparatus may comprise a middle frame, a front housing, and a core function module. The core function module may comprise a frame assembly and a display module mounted on the frame assembly.

Abstract: The present invention is mainly related to a virtual reality all-in-one apparatus. The virtual reality all-in-one apparatus may comprise a middle frame, a front housing, and a core function module. The core function module may comprise a frame assembly and a display module mounted on the frame assembly.

Abstract: The present invention relates to a substrate testing circuit comprising a testing bus and a testing signal terminal connected to the testing bus, a signal line to be tested in the substrate being connected to the testing bus via a signal connecting terminal, wherein a plurality of signal access terminals are provided on the testing bus; one testing branch is connected between each the signal access terminal and the testing signal terminal; and resistance values of the testing branches are the same.

Abstract: The present invention relates to a substrate testing circuit comprising a testing bus and a testing signal terminal connected to the testing bus, a signal line to be tested in the substrate being connected to the testing bus via a signal connecting terminal, wherein a plurality of signal access terminals are provided on the testing bus; one testing branch is connected between each the signal access terminal and the testing signal terminal; and resistance values of the testing branches are the same.

Abstract: A thin film transistor (TFT) display panel as well as a manufacturing method and a detection method thereof are provided. The TFT display panel comprises at least two display regions and a detection region, wherein a gate detection line is correspondingly connected at least with all the gate lines from one of the display regions in the detection region. The embodiments of the present invention improve the safety of the circuits in the detection region, and simplify the mask process of the TFT display panel and the detection process for the display region, which in turn increases the production efficiency of the TFT and reduces the production cost.