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Patent Issued for Liquid Crystal Display Mother Panel Comprising Primary Spacers and Secondary Spacers Wherein the Primary Spacers Are Surrounded by...

July 1, 2014



Patent Issued for Liquid Crystal Display Mother Panel Comprising Primary Spacers and Secondary Spacers Wherein the Primary Spacers Are Surrounded by a Primary Sealant Element

By a News Reporter-Staff News Editor at Journal of Technology -- Beijing Boe Optoelectronics Technology Co., Ltd. (Beijing, CN) has been issued patent number 8755018, according to news reporting originating out of Alexandria, Virginia, by VerticalNews editors.

The patent's inventors are Huang, Dongsheng (Beijing, CN); Zhao, Kai (Beijing, CN).

This patent was filed on September 3, 2010 and was published online on June 17, 2014.

From the background information supplied by the inventors, news correspondents obtained the following quote: "Embodiments of the present invention relate to a liquid crystal display (LCD) mother panel and a method of manufacturing the same.

"Thin film transistor-liquid crystal displays (TFT-LCDs) have been becoming more and more popular because of its merits such as small volume, low power consumption, no radiation and low cost.

"A TFT-LCD comprises a color filter substrate and an array substrate arranged opposite to each other. During attaching the color filter substrate and the array substrate to each other during manufacture of the TFT-LCD, some members, including primary spacers, secondary spacers, a primary sealant element and a secondary sealant element, can be interposed between the two substrates so as to support and maintain a uniform distance between the two substrates.

"FIG. 1 is a schematic view illustrating a structure obtained by attaching the color filter substrate to the array substrate, and FIG. 2 is a sectional view of a conventional structure by attaching a color filter substrate and an array substrate taken along a line A-A in FIG. 1.

"Referring to FIGS. 1 and 2, a mother panel 100 comprising the color filter substrate 1, the array substrate 2 and members between the color filter substrate 1 and the array substrate 2 includes a plurality of panels 3. A primary sealant element 4 is disposed at periphery of each individual panel 3, and primary spacers 5 are dispersed in a region (i.e., display region) surrounded by the primary sealant element 4. The primary spacers 5 serve to maintain a uniform distance between the color filter substrate 1 and the array substrate 2 in each individual panel 3 after the attaching. Meanwhile, a secondary sealant element 6 is disposed between adjacent individual panels 3 and outside each individual panel 3, that is, at a dummy region of the LCD mother panel 100. Secondary spacers 7 are dispersed between the secondary sealant element 6 and the primary sealant element 4 so as to maintain a uniform distance between the color filter substrate 1 and the array substrate 2 attached to each other at a region between adjacent panels 3. Liquid crystal material is filled in the space surrounded by the primary sealant element 4 between the color filter substrate 1 and the array substrate 2.

"With performing a vacuum-attaching step for the above described LCD mother panel 100, there are following problems: when the vacuum state is broken and the LCD mother panel 100 is in the air, the substrate is subject to different supporting force at both sides of the primary sealant element 4 due to same atmospheric pressure but different spacers at both sides of the primary sealant element 4, as shown in FIG. 3. It may cause that the individual panel 3 has a varying thickness in the peripheral region (about the primary sealant element 4) and thus liquid crystal molecules are aligned abnormally, deteriorating display quality of the LCD panel."

Supplementing the background information on this patent, VerticalNews reporters also obtained the inventors' summary information for this patent: "An embodiment of the present invention provides a liquid crystal display mother panel including at least one panel, the mother panel comprising: a color filter substrate; an array substrate opposite to the color filter substrate; and a primary sealant element, a secondary sealant element, primary spacers and secondary spacers disposed between the color filter substrate and the array substrate, wherein the primary sealant element is disposed along a periphery of the at least one panel, the primary spacers are disposed in a region surrounded by the primary sealant element, the secondary sealant element is disposed outside the at least one panel, and the secondary spacers are disposed between the primary sealant element and the secondary sealant element, and wherein the secondary spacers have a height different from that of the primary spacers, and the primary spacers and the secondary spacers maintain a same distance between the color filter substrate and the array substrate when they are against structural layers on the two substrates, respectively.

"Another embodiment of the present invention provides a method for manufacturing a liquid crystal display mother panel including at least one panel, the method comprising: depositing a spacer material on a substrate and then performing an exposing process, wherein a region corresponding to a secondary spacer is not exposed, a region corresponding to a primary spacer is half-exposed, and a remaining region is fully exposed, such that the primary spacer and the secondary spacer are formed on the substrate, he primary spacer has a height from that of the secondary spacer, the primary spacer is disposed inside the at least one panel, and the secondary spacer is disposed outside the at least one panel.

"Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from the following detailed description."

For the URL and additional information on this patent, see: Huang, Dongsheng; Zhao, Kai. Liquid Crystal Display Mother Panel Comprising Primary Spacers and Secondary Spacers Wherein the Primary Spacers Are Surrounded by a Primary Sealant Element. U.S. Patent Number 8755018, filed September 3, 2010, and published online on June 17, 2014. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO1&Sect2=HITOFF&d=PALL&p=1&u=%2Fnetahtml%2FPTO%2Fsrchnum.htm&r=1&f=G&l=50&s1=8755018.PN.&OS=PN/8755018RS=PN/8755018

Keywords for this news article include: Beijing Boe Optoelectronics Technology Co. Ltd..

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Source: Journal of Technology


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