Liquid crystal display device
View Patent ↗In a liquid crystal display device having a front window, light from a backlight is prevented from leaking through chamfered edges of the front window. An upper polarizing plate is formed on an opposing substrate and a light shielding material is formed abutting on an outer edge of the upper polarizing plate. Edges of the upper polarizing plate are located inward of edges of the front window. The upper polarizing plate and the front window are bonded with a boding material including an ultraviolet curable resin. The ultraviolet curable resin also lies over the light shielding material. Chamfers are formed in the front window and the ultraviolet curable resin does not adhere to the chamfers of the front window. By this structure, light from the backlight is prevented from entering the internal part of the front window through the chamfers of the front window and light leakage is prevented.
1. A liquid crystal display device comprising a liquid crystal display panel that includes a TFT substrate having a matrix arrangement of pixel electrodes and TFTs for controlling signals to the pixel electrodes and an opposing substrate having color filters formed corresponding to the pixel electrodes, the TFT substrate being formed larger than the opposing substrate and a terminal section being formed in a portion where the opposing substrate does not extend over the TFT substrate,
wherein an upper polarizing plate is directly bonded to the opposing substrate of the liquid crystal display panel and a light shielding material is formed between the opposing substrate and a front window and laid along a periphery of the upper polarizing plate and along and outside of a peripheral edge of a side of the upper polarizing plate at a position which is opposite to the terminal section;
wherein the front window is formed over the upper polarizing plate and all peripheral edges of the upper polarizing plate are located inward of all peripheral edges of the front window;
wherein the upper polarizing plate and the front window are directly bonded with a bonding material made from an ultraviolet curable resin;
wherein the ultraviolet curable resin lies over the light shielding material; and
wherein chamfers are formed in the front window and the bonding material does not adhere to the chamfers.
2. The liquid crystal display device according to claim 1 , wherein the ultraviolet curable resin is initially a liquid including an acrylic oligomer.
3. The liquid crystal display device according to claim 1 , wherein the light shielding material is formed by a light shielding tape with an adhesive material.
4. The liquid crystal display device according to claim 1 , wherein the upper polarizing plate and the light shielding tape abut each other.
5. The liquid crystal display device according to claim 1 ,
wherein a light shielding tape shaped for marginal edges is formed along and outside the peripheral edges of the front window and above the light shielding material; and
wherein the peripheral edges of the light shielding tape shaped for marginal edges are located outward of the peripheral edges of the opposing substrate.
6. A liquid crystal display device comprising a liquid crystal display panel that includes a TFT substrate having a matrix arrangement of pixel electrodes and TFTs for controlling signals to the pixel electrodes and an opposing substrate having color filters formed corresponding to the pixel electrodes; and a backlight placed in back of the liquid crystal panel,
wherein an upper polarizing plate and a light shielding material are placed on the opposing substrate of the liquid crystal display panel and the light shielding material is formed between the opposing substrate and a front window and laid along a periphery of the upper polarizing plate;
wherein the front window is placed over the upper polarizing plate, and the upper polarizing plate and the front window are directly bonded with an ultraviolet curable resin;
wherein the ultraviolet curable resin extends over at least a portion of a surface of the upper polarizing plate opposite to a surface of the front window, covers a peripheral edge of the surface of the upper polarizing plate, and extends beyond the peripheral edge of the surface of the upper polarizing plate; and
wherein the light shielding material is laid between the ultraviolet curable resin which extends beyond the peripheral edge of the surface of the upper polarizing plate and the opposing substrate.
7. The liquid crystal display device according to claim 6 , wherein a frame-like light shielding tape is placed in the marginal edges of the opposing substrate and on top of the ultraviolet curable resin.