Display device
View Patent ↗A liquid crystal display panel formed by using a TFT substrate and a color filter substrate is polished to decrease the thickness thereof so that it can be curved. The liquid crystal display panel and various optical sheets are sandwiched between a frame forming a curved surface and a light guide plate forming a curved surface, to thereby form a curved surface. An upper polarizer plate and a lower polarizer plate are, respectively, sandwiched between the surface cover and the liquid crystal display panel, and between the liquid crystal display panel and the optical sheet, and are not adhered or are partly adhered to the liquid crystal display panel.
1. A liquid crystal display device comprising a TFT substrate forming pixel electrodes and TFTs, a color filter substrate forming a color filter, a liquid crystal display panel of which the liquid crystals hare sandwiched between the color filter substrate and the TFT substrate, a frame covering the peripheries of the liquid crystal display panel to hold the liquid crystal display panel, and a back light; wherein
the frame has a curved surface, and the liquid crystal display panel has a curved surface defined by the curved surface of the frame,
the TFT substrate and the color filter substrate are formed of a glass,
an upper polarizer plate is sandwiched between the color filter substrate and the frame, the upper polarizer plate being fixed via a first adhering member to the color filter substrate only at a first outer edge portion of the color filter substrate, and a lower polarizer plate is sandwiched between the TFT substrate and the back light, the lower polarizer plate being fixed via a second adhering member to the TFT substrate only at a first outer edge portion of the TFT substrate,
the color filter substrate has a second outer edge portion which is on an opposite side of the first outer edge portion thereof,
the TFT substrate has a second outer edge portion which is on an opposite side of the first outer edge portion thereof,
the upper polarizer plate is not fixed to the second outer edge portion of the color filter substrate, and
the lower polarizer plate is not fixed to the second outer edge portion of the TFT substrate.
2. The liquid crystal display device as set forth in claim 1 , wherein the back light has a light guide plate or a diffusing plate and optical sheets, a dented portion is formed in the light guide plate or in the diffusing plate, the optical sheets are held in the dented portion, and a curved surface of the dented portion on the side facing the liquid crystal display panel is in agreement with the curved surface of the liquid crystal display panel.
3. The liquid crystal display device as set forth in claim 1 , wherein when the thickness of the liquid crystal display panel is denoted by t, the radius of curvature R of the curved surface of the liquid crystal display panel has a relationship R>400t.
4. The liquid crystal display device as set forth in claim 1 , wherein when the thickness of the liquid crystal display panel is denoted by t, the radius of curvature R of the curved surface of the liquid crystal display panel has a relationship R>800t.
5. The liquid crystal display device as set forth in claim 1 , wherein a transparent surface cover is arranged between the frame and the liquid crystal display panel to cover the liquid crystal display panel.