Method for saving by-pass capacitor by using circuit board

A method for saving by-pass capacitor by using circuit board, comprising the following steps:

• (1) providing a liquid crystal panel, wherein the liquid crystal panel comprises two glass substrates and a liquid crystal material arranged between the two glass substrates, the glass substrates forming a liquid crystal panel driving circuit, the liquid crystal panel driving circuit comprising a gate driver, a source driver, a plurality of gate lines, and a plurality of data lines, the plurality of gate lines and the data lines defining a plurality of pixel units, the liquid crystal material comprising liquid crystal molecules;
• (2) providing a power supply module and a power connection circuit board, wherein the power connection circuit board comprises two printing plates that are arranged parallel to each other and a base material arranged between the two printing plates, one of the printing plates being provided with a power route, the other one of the printing plates being provided with a grounding route, the power route and the grounding route each comprising an exposed copper zone at a location where a by-pass capacitor is desired to form, the two exposed copper zones and the base material between the two exposed copper zone collectively forming an equivalent by-pass capacitor to achieve an effect of by-pass capacitance;
• (3) connecting the gate driver and the source driver via the power connection circuit board to the power supply module;
• and
• (4) activating the power supply module to supply electrical power to the gate driver and the source driver so as to control, via the data lines and the gate lines, the rotation of liquid crystal molecules contained in each of the pixel units;
• wherein the base material comprises an insulation material;
• wherein the source driver comprises a plurality of source driving chips, the plurality of data lines being arranged to correspond to the plurality of source driving chips so that each of the data lines is individually controllable;
• wherein the gate driver comprises a plurality of gate driving chips, the plurality of gate lines being arranged to correspond to the plurality of gate driving chips so that each of the gate lines is individually controllable;
• wherein the pixel units each comprises a thin-film transistor, a common electrode, a pixel electrode electrically connected to the thin-film transistor, and a storage capacitor, the thin-film transistors being respectively and electrically connected via the gate lines and the data lines to the gate driver and the source driver, the common electrode and the pixel electrode collectively forming a liquid crystal capacitor, the storage capacitor being connected in parallel with the liquid crystal capacitor;
• wherein the thin-film transistors each comprise a gate terminal, a source terminal, and a drain terminal, the gate terminal being electrically connected via the respective gate line to the gate driver, the source terminal being electrically connected via the respective data line to the source driver, the drain terminal being electrically connected to the pixel electrode;
• wherein the gate driving chips and the source driving chips are each provided with a power input terminal, the two exposed copper zones of step (2) being provided at the power input terminal of each of the gate driving chips and the source driving chips;
• wherein the exposed copper zones of each of the equivalent by-pass capacitors have an effective area that is determined according to capacitance of the desired capacitor at the location;
• wherein each of the equivalent by-pass capacitors has capacitance determined by the following equation:
• c
• =
• ɛ
• *
• S
• D
• in which ε indicates dielectric constant of the base material, D is thickness of the board of the base material, and S indicates effective area of the exposed copper zones;
• and
• wherein the power supply module comprises a DC-DC conversion power supply.