Liquid crystal panel substrate with light-shielding film in a pixel region, liquid crystal panel, and electronic equipment and projection type display device both using the same to reduce light leakage

Abstract

A substrate is provided having a pixel region including a pixel electrode and a switching element. A periphery region in the periphery of the pixel region includes a first light-shielding film, the first light-shielding film being formed from the same layer as the pixel electrode. A passivation film that covers the pixel electrode and the first light-shielding film is provided.

What is claimed is: 
     
         1 . A substrate for a display device, comprising:
 a plurality of electrodes that are formed in a pixel region, each of the plurality of electrodes being positioned at a first position corresponding to one pixel of a plurality of pixels;   a plurality of first switching elements that are formed in the pixel region, each of the plurality of first switching elements being positioned at a second position corresponding to one pixel of the plurality of pixels;   a light shielding film that covers at least a part of one first switching element of the plurality of first switching elements;   a driving circuit that is positioned outside of the pixel region, the driving circuit including a plurality of second switching elements; and   a wire that is positioned in the driving circuit, the wire being electrically connected to one second switching element of the plurality of second switching elements.   
     
     
         2 . The substrate according to  claim 1 ,
 the light shielding film being formed in a first layer in which the wire is formed.   
     
     
         3 . The substrate according to  claim 1 ,
 a material constituting the light shielding film being identical with a material constituting the wire.   
     
     
         4 . The substrate according to  claim 2 ,
 the plurality of first switching elements being a plurality of first transistors,   a gate of one first transistor of the plurality of first transistors being formed between the first layer and a semiconductor region including a source and a drain of the one first transistor.   
     
     
         5 . A display device comprising:
 the substrate of  claim 1 ;   a transparent substrate having a counter electrode and being opposed to the substrate, the transparent substrate being separated from the substrate by a gap; and   a liquid crystal material encapsulated into the gap between the substrate and the transparent substrate.   
     
     
         6 . An electronic device comprising the display device of  claim 5  as a display section. 
     
     
         7 . A projection display device comprising:
 the electronic device of  claim 6 ;   a light source;   the display device modulating the light from the light source; and   a projection lens for projecting the light modulated by the display device.   
     
     
         8 . A substrate for a display device, comprising:
 a plurality of electrodes that are formed in a pixel region, each of the plurality of electrodes being positioned at a first position corresponding to one pixel of a plurality of pixels;   a plurality of first switching elements that are formed in the pixel region, each of the plurality of first switching elements being positioned at a second position corresponding to one pixel of the plurality of pixels;   a metal layer that overlaps at least a part of one first switching element of the plurality of first switching elements;   a driving circuit that is positioned outside of the pixel region, the driving circuit including a plurality of second switching elements; and   a wire that is positioned in the driving circuit, the wire being electrically connected to one second switching element of the plurality of second switching elements.   
     
     
         9 . The substrate according to  claim 8 ,
 the metal layer being formed in a first layer in which the wire is formed.   
     
     
         10 . The substrate according to  claim 8 ,
 a material constituting the metal layer being identical with a material constituting the wire.   
     
     
         11 . The substrate according to  claim 9 ,
 the plurality of first switching elements being a plurality of first transistors,   a gate of one first transistor of the plurality of first transistors being formed between the first layer and a semiconductor region including a source and a drain of the one first transistor.   
     
     
         12 . The substrate according to  claim 11 ,
 the semiconductor region being formed in a well.   
     
     
         13 . A substrate for a display device, comprising:
 a plurality of electrodes that are formed in a pixel region, each of the plurality of electrodes being positioned at a first position corresponding to one pixel of a plurality of pixels;   a plurality of first transistors that are formed in the pixel region, each of the plurality of first transistors being positioned at a second position corresponding to one pixel of the plurality of pixels;   a metal layer that covers at least a part of one first transistor of the plurality of first transistors;   a driving circuit that is positioned outside of the pixel region, the driving circuit including a plurality of second transistors; and   a wire that is positioned in the driving circuit, the wire being electrically connected to one second transistor of the plurality of second transistors.   
     
     
         14 . The substrate according to  claim 13 ,
 the metal layer covering a first gate of the first transistor.   
     
     
         15 . The substrate according to  claim 13 .
 the metal layer covering at least a part of a first semiconductor region of the first transistor, the first semiconductor region including a first source and a first drain of the first transistor.   
     
     
         16 . The substrate according to  claim 15 ,
 the first semiconductor region being formed in a well.   
     
     
         17 . The substrate according to  claim 8 ,
 the plurality of second switching elements being a plurality of second transistors.   
     
     
         18 . The substrate according to  claim 8 ,
 the wire being electrically connected to a third switching element of the plurality of second switching elements.   
     
     
         19 . A substrate for a display device, comprising:
 a plurality of first switching elements that are formed in a pixel region;   a metal layer that overlaps at least a part of one first switching element of the plurality of first switching elements;   a driving circuit that is positioned outside of the pixel region, the driving circuit including a plurality of second switching elements; and   a wire that is positioned in the driving circuit, the wire being electrically connected to one second switching element of the plurality of second switching elements.   
     
     
         20 . The substrate according to  claim 19 ,
 the metal layer being formed in a first layer in which the wire is formed.   
     
     
         21 . The substrate according to  claim 19 ,
 a material constituting the metal layer being identical with a material constituting the wire.   
     
     
         22 . The substrate according to  claim 20 ,
 the plurality of first switching elements being a plurality of first transistors,   a gate of one first transistor of the plurality of first transistors being formed between the first layer and a semiconductor region including a source and a drain of the one first transistor.   
     
     
         23 . A substrate for a display device, comprising:
 a plurality of first transistors that are formed in a pixel region;   a metal layer that overlaps at least a part of one first transistors of the plurality of first transistors;   a driving circuit that is positioned outside of the pixel region, the driving circuit including a plurality of second transistors; and   a wire that is positioned in the driving circuit, the wire being electrically connected to one second transistor of the plurality of second transistors.   
     
     
         24 . The substrate according to  claim 23 ,
 the metal layer being formed in a first layer in which the wire is formed.   
     
     
         25 . The substrate according to  claim 23 ,
 a material constituting the metal layer being identical with a material constituting the wire.   
     
     
         26 . The substrate according to  claim 24 ,
 a gate of one first transistor of the plurality of first transistors being formed between the first layer and a semiconductor region including a source and a drain of the one first transistor.