Method for manufacturing fluorescent powder substrate and liquid crystal module using fluorescent powder substrate

Abstract

A method for manufacturing fluorescent powder substrate includes ( 1 ) providing a fluorescent powder and glass panels of which one forms a through hole; ( 2 ) mixing the fluorescent powder in deionized water solvent to form a slurry; ( 3 ) applying the slurry to form a fluorescent powder layer on one glass panel; ( 4 ) laying flat a loop of low melting point glass powder on the glass panel on which the fluorescent powder layer is formed; ( 5 ) laminating the other glass panel on the glass panel; ( 6 ) burning the laminated glass panels at a temperature of 400-550° C. to completely combust organic substance therebetween and to have the low melting point glass powder bonding the glass panels together; ( 7 ) evacuating interior between the glass panels through the through hole; and ( 8 ) sealing the through hole to form a fluorescent powder substrate.

What is claimed is: 
     
         1 . A liquid crystal module, comprising:
 a fluorescent powder substrate, which comprises first and second glass panels and a fluorescent powder layer interposed between the first and second glass panels, wherein the first and second glass panels each comprise a single layer of glass having a glass surface, the glass surfaces facing each other with the fluorescent powder interposed therebetween and in direct contact with the glass surfaces of the first and second glass panels; and   a liquid crystal display panel and a backlight source, which are respectively set at opposite sides of the fluorescent powder substrate, the backlight source emitting light that is converted by the fluorescent powder substrate to form a planar light source for the liquid crystal display panel.   
     
     
         2 . The liquid crystal module as claimed in  claim 1 , wherein the liquid crystal display panel comprises an array substrate, a color filter substrate laminated on the array substrate, liquid crystal interposed between the array substrate and the color filter substrate, and a sealing resin frame interposed between the array substrate and the color filter substrate and set along edges of the color filter substrate, the sealing resin frame sealing the liquid crystal between the array substrate and the color filter substrate so as to form a liquid crystal box, the planar light source having a size corresponding to the liquid crystal box. 
     
     
         3 . The liquid crystal module as claimed in  claim 1 , wherein the fluorescent powder layer is formed of fluorescent powder comprising a mixture of oxides, silicates, aluminates, nitrides, and oxynitrides. 
     
     
         4 . The liquid crystal module as claimed in  claim 1 , wherein the fist and second glass panels are combined to each other with a loop of low melting point glass powder between the glass surfaces of the first and second glass panels. 
     
     
         5 . The liquid crystal module as claimed in  claim 1 , wherein the low melting point glass powder is subjected to heating at a temperature of 400-550° C. so as to bond the first and second glass panels to each other. 
     
     
         6 . The liquid crystal module as claimed in  claim 1 , wherein a loop of low melting point glass powder is arranged and bonded between the glass surfaces of the first and second glass panels and the fluorescent powder layer is sealed between the glass surfaces by the loop of the glass powder. 
     
     
         7 . The liquid crystal module as claimed in  claim 1 , wherein the fluorescent powder layer is formed of slurry comprising fluorescent powder mixed in a deionized water solvent. 
     
     
         8 . The liquid crystal module as claimed in  claim 7 , wherein the slurry further comprises triethyl phosphate, zinc strontium calcium borate, calcium pyrophosphate, and ammonium dihydrogen phosphate. 
     
     
         9 . The liquid crystal module as claimed in  claim 7 , wherein the deionized water solvent comprises a water-soluble polymer based bonding agent. 
     
     
         10 . The liquid crystal module as claimed in  claim 9 , wherein the water-soluble polymer based bonding agent comprises one of polyvinyl alcohol and ammonium polymethacrylate. 
     
     
         11 . The liquid crystal module as claimed in  claim 1 , wherein the first and second glass panels are high transmittance glass.