Differential signal interface and display device adopting differential signal interface
A differential signal, low-voltage differential signal technology, applied in the direction of logic circuit connection/interface layout, logic circuit coupling device, static indicator, etc., can solve the problem that the eye diagram cannot meet the specification, the mini-LVDS interface cannot adjust the signal eye diagram, Affect the display effect and other problems to achieve the effect of improving display quality, improving eye diagram quality, and improving transmission efficiency
Active Publication Date: 2020-12-01
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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[0003] Since the mini-LVDS interface cannot adjust the eye diagram of each signal received, the signal sent from the same end is due to the different input and output impedance matching between the sending end or receiving end and the transmission line, resulting in the transmission signal being generated at the sending end or receiving end. reflections, causing differences between the eye diagrams of signals received at different receivers
For transmission lines of different materials and lengths, the eye diagrams of some transmission signals cannot meet the requirements of the specifications, and poor-quality eye diagrams often cause display abnormalities, such as blurred screen, no image, and colorful spots, which affect the display effect
[0004] The existing ways to adjust the eye diagram of the transmission signal are to adjust the amplitude of the mini-LVDS differential signal, or to pre-emphasize the transition bit to compensate for the loss of the high-frequency component caused by the signal transition on the transmission line, but these methods have May cause electromagnetic interference (Electromagnetic Interference, EMI) problems
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[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Apparently, the described embodiments are only some of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of this application.
[0028] Impedance matching is mainly used on transmission lines to achieve the purpose that all high-frequency microwave signals can be transmitted to the load point, and almost no signal is reflected back to the source point, thereby improving transmission efficiency. The internal resistance of the signal source is equal to and in phase with the characteristic impedance of the connected transmission line, or the characteristic impedance of the transmission line is equal in size a...
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The invention provides a differential signal interface and a display device adopting the differential signal interface. A plurality of different differential signals are transmitted between a sendingend and a receiving end of the differential signal interface through a plurality of differential pairs. A plurality of adjusting modules are arranged between the sending end and the receiving end. Andeach adjusting module is connected with the corresponding differential pair and is used for adjusting the impedance of the sending end and / or the receiving end, so that the impedance of the sending end and / or the receiving end is matched with the impedance of the corresponding differential pair, the eye pattern quality of the differential signal received by the receiving end is improved, and thetransmission efficiency is improved. The differential signal interface is used for connecting a time sequence controller in the display device with a source controller of a display panel, so that theeye pattern quality of a display signal can be improved, the display signal is prevented from distortion, and the display quality of the display device is improved.
Description
technical field [0001] The present application relates to the field of display technology, in particular to a differential signal interface and a display device using the differential signal interface. Background technique [0002] At present, the mini-LVDS interface is often used to transmit signals between the timing control board and the display panel of the display device, and the quality of the transmitted signal is usually measured by an eye diagram. [0003] Since the mini-LVDS interface cannot adjust the eye diagram of each signal received, the signal sent from the same end is due to the different input and output impedance matching between the sending end or receiving end and the transmission line, resulting in the transmission signal being generated at the sending end or receiving end. Reflection, so that there is a difference between the eye diagrams of the signals received by different receivers. For transmission lines of different materials and lengths, the eye...
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IPC IPC(8): G09G3/20
CPCG09G3/2096G09G3/2092G09G2370/16G09G2370/08G09G2320/0693H03K19/017545
Inventor 刘汉先
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD