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Researchers Submit Patent Application, "Liquid Crystal Panel, Scanning Circuit and Method for Generating Angle Waves", for Approval

August 27, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventor HUANG, Chang Xin (Taipei City, TW), filed on July 3, 2013, was made available online on August 14, 2014.

No assignee for this patent application has been made.

News editors obtained the following quote from the background information supplied by the inventors: "This invention relates to a liquid crystal panel, a scanning circuit and a method for generating angle waves, and more particularly to a liquid crystal panel, a scanning circuit and a method can generate angle waves by using a voltage dividing manner.

"By transmitting start signals (i.e., gate driving signal) to gate lines of a typical liquid crystal panel respectively, semiconductor channel layers of thin film transistor (TFT) elements can be energized to control a suitable charge time of liquid crystal units corresponding to the gate lines, and then each pixel data signal is transmitted from a source electrode to a drain electrode through the energized semiconductor channel layer so as to charge the liquid crystal units. When the liquid crystal units are charged, the waveforms of the start signals are deformed because the number of the liquid crystal units is gradually increased so as to cause the start signals to be affected by an electrical impedance of the increased liquid crystal units. The deformed waves of the start signals can cause electrical charges to be different when the liquid crystal units are charged. Thus, an angle wave module is disposed between a timing controller and a gate driving circuit by a supplier, and the angle wave module is adapted to generating angle waves at the start signals, whereby the affection of the electrical impedance of the increased liquid crystal units is decreased, voltage waveforms of standard work signals which is provided to the liquid crystal units are kept, and the electrical charges can be balanced when the liquid crystal units are charged.

"In order to generating angle waves, the voltage of the start signal at a high voltage level is changed in a discharging manner by the angle wave module, and a discharging slope can be controlled by designing resistors and capacitors. However, the electrical energy of the start signal can be consumed and not fully utilized during the discharging process, and thus the energy-saving requirement of a green product cannot be met at present and in the future.

"Accordingly, there exists a need for a scanning circuit and a method, which can fully utilize the electrical energy of the gate driving signals, generate angle waves and be capable of solving the above-mentioned problems."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventor's summary information for this patent application: "It is an objective of the present invention to provide a liquid crystal panel, a scanning circuit and a method, which can fully utilize the electrical energy of the gate driving signals and generate angle waves.

"In order to achieve the objective, the present invention provides a scanning circuit for generating angle waves. The scanning circuit for generating angle waves includes a scanning module and a plurality of angle wave modules. The scanning module has a plurality of scan output ends for outputting scan driving signals respectively in order, wherein the scan driving signal includes a first voltage and a second voltage. The angle wave modules are electrically connected to the scan output ends respectively in order, wherein each angle wave module includes a selecting unit and a controlling unit. The selecting unit includes a scan input end for periodically receiving the first voltage and the second voltage. The controlling unit includes a first output end and a second output end, and is electrically connected to the selecting unit for receiving a first control signal and a second control signal. When the scan input end receives the first voltage, the selecting unit generates the first control signal according to the first voltage, and the first output end outputs a gate driving signal according to the first control signal; when the voltage received the scan input end is decreased from the first voltage to the second voltage, the selecting unit shut off the first control signal and then generates the second control signal, and the second output end receives a part of electrical energy of the first output end according to the second control signal, whereby the first output end outputs an angle wave; and the selecting unit shuts off the second control signal and then generates a third control signal after the first output end outputs the angle wave, and the first output end outputs a gate off signal according to the third control signal. The second output end of the controlling unit of each angle wave module is electrically connected the first output end of the controlling unit of next one of the angle wave modules, whereby the part of electrical energy received by the second output end of the controlling unit of the angle wave modules is transmitted to the first output end of the controlling unit of the next one of the angle wave modules.

"The present invention further provides a method for generating angle waves, the method including the following steps of: inputting a first voltage to a first angle wave module, whereby a selecting unit of the first angle wave module generates a first control signal according to the first voltage, and a first output end of a controlling unit of the first angle wave module outputs a gate driving signal according to the first control signal; when the first voltage is decreased to a second voltage, shutting off the first control signal and then generating a second control signal by the selecting unit of the first angle wave module, receiving a part of electrical energy of the first output end by the second output end of the first angle wave module according to the second control signal, and transmitting the part of electrical energy to a first output end of a controlling unit of the second angle wave module, whereby the first output end of the first angle wave module outputs an angle wave; and after the first output end of the first angle wave module outputs the angle wave, shutting off the second control signal and then generating a third control signal by the selecting unit of the first angle wave module, and outputting a gate off signal by the first output end of the first angle wave module according to the third control signal.

"The present invention further provides a liquid crystal panel including: a scanning circuit for generating angle waves; and a plurality of gate lines electrically connected to the first output end of the first angle wave module of the scanning circuit respectively in order.

"According to the liquid crystal panel, the scanning circuit and the method for generating angle waves in the present invention, the voltage of the first output end of the preceding angle wave module is divided so as to recycle the removed electrical energy of the preceding angle wave module because of generating the angle wave. Also, the removed electrical energy is recycled to the first output end of the succeeding angle wave module, i.e., electric charge released by the preceding angle wave module can be utilized to pre-charge the succeeding gate line, thereby providing pixels of a liquid crystal display with charge in advance, decreasing the whole power consumption of the liquid crystal display, and meeting the energy-saving requirement of a green product.

"In order to make the aforementioned and other objectives, features and advantages of the present invention comprehensible, embodiments are described in detail below with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

"FIG. 1 is a circuit diagram of an angle wave module according to an embodiment of the present invention;

"FIG. 2 shows waveforms of a scan input end, a first output end and a second output end of the angle wave module of FIG. 1;

"FIG. 3 is a flow chart of a method for generating angle waves according to an embodiment of the present invention;

"FIG. 4 is a circuit diagram of a liquid crystal panel according to an embodiment of the present invention; and

"FIG. 5 shows waveforms of a clock signal, a first scan output end, a second scan output end, a third scan output end and first output ends of the scanning circuit of the crystal panel of FIG. 4."

For additional information on this patent application, see: HUANG, Chang Xin. Liquid Crystal Panel, Scanning Circuit and Method for Generating Angle Waves. Filed July 3, 2013 and posted August 14, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5280&p=106&f=G&l=50&d=PG01&S1=20140807.PD.&OS=PD/20140807&RS=PD/20140807

Keywords for this news article include: Patents, Electronics, Semiconductor.

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Source: Electronics Newsweekly


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