Liquid crystal display device with polarizing plates
View Patent ↗A liquid crystal display device comprising: a liquid crystal cell including a quadrilateral display surface and a liquid crystal layer enclosed between glass substrates and controlling light entering from a second surface side and exiting to a first surface side; a first polarizing plate including a polarizer having an absorption axis and adhered to the first surface side with an adhesive layer; and a second polarizing plate including a polarizer having an absorption axis and adhered to the second surface side with an adhesive layer such that one of the polarizing plates including the polarizer with a larger maximum dimension in an absorption axis direction on the display surface is adhered to the glass substrate with an adhesive layer having higher adhesion strength to the glass substrate than the adhesive layer of other polarizing plates including the polarizer with a smaller maximum dimension in the absorption axis direction.
1. A liquid crystal display device comprising:
a liquid crystal cell including a liquid crystal layer enclosed between glass substrates, the liquid crystal cell having a first surface and a second surface opposite to the first surface, the first surface being quadrilateral, the liquid crystal cell controlling light entering from the second surface to make the light to transmit through the liquid crystal cell and to exit from the first surface;
a first polarizing plate including
a first polarizer having a first absorption axis,
a first phase difference film provided between the first polarizer and the first surface, the first phase difference film including a first side inclined with the first absorption axis, and
a first adhesive layer provided between the first phase difference film and the first surface, the first adhesive layer adhering to the first surface, the first adhesive layer having a first adhesive strength with respect to the first surface,
the first polarizer having a first dimension in a first direction along the first absorption axis;
a second polarizing plate including
a second polarizer having a second absorption axis, the second absorption axis being perpendicular to the first absorption axis,
a second phase difference film provided between the second polarizer and the second surface, the second phase difference film having a second side inclined with the second absorption axis, and
a second adhesive layer provided between the second phase difference film and the second surface, the second adhesive layer adhering to the second surface, the second adhesive layer having a second adhesive strength with respect to the second surface, the second adhesive strength being larger than the first adhesive strength,
the second polarizer having a second dimension in a second direction along the second absorption axis, the second dimension being larger than the first dimension; and
a backlight, the second polarizing plate being disposed between the backlight and the liquid crystal cell,
the first adhesive layer being conductive,
wherein
the second adhesive layer is formed of an adhesive the same as an adhesive forming the first adhesive layer, and
a conductivity of the first adhesive layer is not less than 10 8 Ω/□ and not more than 10 10 Ω/□.
2. The liquid crystal display device according to claim 1 , wherein
the second adhesive strength is larger than the first adhesive strength in a temperature range where the second polarizer shrinks.
3. The liquid crystal display device according to claim 1 , wherein
the liquid crystal cell has a pair of electrodes formed to sandwich the liquid crystal layer,
the liquid crystal cell includes
an opposite electrode provided on a side of the first surface, and
a pixel electrode provided on a side of the second surface, and
a slit is formed on the opposite electrode,
wherein the liquid crystal cell comprises a VA mode structure.
4. The liquid crystal display device according to claim 1 , wherein
a thickness of the second adhesive layer is thicker than a thickness of the first adhesive layer.