Liquid crystal display and manufacturing process thereof
View Patent ↗The invention provides a small-sized liquid crystal display in which a frame region of an outer peripheral portion of a display region is made small without any light leak at peripheral portion of the display region of a liquid crystal display panel. The invention also provides a manufacturing process of such a liquid crystal display. Periphery shading films (shade films 3 a and 3 b ) of a display region of a liquid crystal display panel are alternately formed on a first substrate 1 (shade film 3 a ) and a second substrate 2 (shade film 3 b ) oppositely arranged, and a transparent portion (width Q) for irradiating a seal resin 4 used to adhere the two substrates forming the liquid crystal display panel with ultraviolet rays 7 is provided within a region (width P) where the periphery shading films are formed.
1. A manufacturing process of a liquid crystal display, comprising the steps of:
providing a first substrate having a display region, first and second outside edge portions arranged across the display region, and a first shade film including a first portion formed on the first outside edge portion and a second portion formed on the second outside edge portion;
providing a second substrate having a display region opposing to the display region of the first substrate, first and second outside edge portions of the second substrate opposing to the first and second outside edge portions of the first substrate respectively, a display electrode for displaying on the display region of the second substrate, an electrode leading wire having shading characteristics and lead from the display electrode to the second outside edge portion of the second substrate, and a second shade film formed only on the second outside edge portion of the second substrate;
forming a combination of the first substrate and the second substrate oppositely to each other with a seal resin of an ultraviolet ray hardening type, the seal resin includes a first portion arranged between the first outside edge portions of the first and second substrates, and a second portion arranged between the second outside edge portions of the first and second substrates;
sealing a liquid crystal held between the first substrate and the second substrate with the seal resin, wherein the ultraviolet ray can be transmitted to the first portion of the seal resin through the first outside edge portion of the second substrate, the second portion of the first shade film and the second shade film formed on the second outside edge portion of the second substrate are formed to give a peripheral shading width formed by putting together the width of the second portion of the first shade film and the width of the second shade film, the second portion of the seal resin is positioned between only the second shade film and a transparent portion of the second outside edge portion of the first substrate opposing to the second shade film, and ultraviolet ray can be transmitted through the transparent portion of the second outside edge portion of the first substrate; and
hardening the seal resin by irradiations to the two sides of the combination with ultraviolet rays.
2. The manufacturing process of the liquid crystal display according to claim 1 , wherein the irradiations to the combination with the ultraviolet rays are performed simultaneously from two sides of the combination.
3. The manufacturing process of the liquid crystal display according to claim 1 , wherein the irradiations to the combination with ultraviolet rays are performed alternately one side after another.
4. The manufacturing process of the liquid crystal display according to claim 1 , wherein the irradiation for at least one side for the combination is performed only on the seal resin applied portion.
5. The manufacturing process of the liquid crystal display according to claim 4 , wherein the irradiation is performed through a shade plate having an ultraviolet ray transmitting region at the seal resin applied portion.
6. The manufacturing process of the liquid crystal display according to claim 4 , wherein the irradiation is performed through a fiber at seal resin applied portion.