Active matrix substrate and liquid crystal display device

An active matrix substrate comprising:

• a substrate having a plurality of pixel regions arranged in a row direction and a column direction in a matrix form;
• a plurality of gate bus lines supported on the substrate and extending in the row direction;
• and
• a plurality of source bus lines supported on the substrate and extending in the column direction,
• wherein each of the pixel regions is defined by corresponding adjacent two of the gate bus lines and corresponding adjacent two of the source bus lines,
• wherein the each of the pixel regions includes a pixel electrode and an oxide semiconductor TFT including an oxide semiconductor layer serving as an active layer, the pixel electrode being electrically connected to a first one of the corresponding adjacent two of the source bus lines through the oxide semiconductor TFT,
• wherein the plurality of source bus lines include a first source bus line and a second source bus line that are adjacent to each other,
• wherein pixels sets each including two of the pixel regions whose pixel electrodes are electrically connected to the first source bus line and pixel sets each including two of the pixel regions whose pixel electrodes are electrically connected to the second source bus line are arranged alternately between the first source bus line and the second source bus line,
• wherein β(A−B) that is a β value of the each of the pixel regions is determined from formula (1) below using own source parasitic capacitance Csd(A) formed between the pixel electrode of the each of the pixel regions and the first one of the corresponding adjacent two of the source bus lines, other source parasitic capacitance Csd(B) formed between the pixel electrode of the each of the pixel regions and a second one of the corresponding adjacent two of the source bus lines, and pixel capacitance Cpi:
• β
• ⁡
• (
• A
• -
• B
• )
• =
• {
• Csd
• ⁡
• (
• A
• )
• -
• Csd
• ⁡
• (
• B
• )
• }
• /
• Cpi
• ,
• and
• (
• 1
• )
• wherein each of the pixel sets is designed such that
• β
• 1
• (
• A
• -
• B
• )
• >
• 0
• ,
• β
• 2
• (
• A
• -
• B
• )
• <
• 0
• ,
• and
• ⁢
• ❘
• "\[LeftBracketingBar]"
• β
• 1
• (
• A
• -
• B
• )
• +
• β
• 2
• (
• A
• -
• B
• )
• ❘
• "\[RightBracketingBar]"
• ≤
• 0.001
• are satisfied, where β1(A−B) and β2(A−B) are β values of the respective two pixel regions in the each of the pixel sets.