US2004041163A1PendingUtilityA1

Liquid crystal display and electronic apparatus

Assignee: SEIKO EPSON CORPPriority: Dec 22, 2000Filed: Apr 30, 2003Published: Mar 4, 2004
Est. expiryDec 22, 2020(expired)· nominal 20-yr term from priority
Inventors:Chiyoaki Iljima
G02F 1/1335G02F 2201/52G02F 1/133514G02F 1/1343G02F 1/133543G02F 1/133555G02F 1/136222G02F 2201/122
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Claims

Abstract

The present invention provides a color transflective liquid crystal display that is capable of display with good coloring and high visibility in both a reflective mode and a transmissive mode while suppressing deterioration in color reproduction caused by unevenness of the spectral properties of the illumination light, if any. The liquid crystal display can include a liquid crystal display panel including pixels formed of a plurality of sub-pixels each corresponding to different colors, and an illumination device, wherein the liquid crystal display panel includes a transflective layer and a color filter of color corresponding to each of the sub-pixels. The transflective layer includes transmissive portions for transmitting illumination light, wherein the transmissive portion is formed such that the dimension of the transmissive area corresponding to the transmissive portion of at least one sub-pixel out of the plurality of sub-pixels and the dimension of the transmissive area corresponding to the transmissive portion of another sub-pixel, differ.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A liquid crystal display, serving as a transflective liquid crystal display which performs displaying by switching between a transmissive mode and a reflective mode, comprising: 
 a liquid crystal layer sandwiched between an upper substrate and a lower substrate opposing one another;    a transflective layer which has a transmissive area that transmits light and a reflective area that reflects incident light from an upper substrate side, and which is disposed on an inner side of the lower substrate;    a color filter disposed on an upper side of the transflective layer, upon which a plurality of pigment layers with different colors according to each of sub-pixels forming a display area are arrayed; and    an illumination device disposed on an outer side of the lower substrate,    the pigment layers being formed over an entirety of an area overlapping the transmissive area in a planar manner and an area overlapping the reflective area in a planar manner, and at least one color pigment layer being formed only at a part of an area overlapping the reflective area in a planar manner,    and a dimension of a pigment layer formation area, where the pigment layers are formed, being formed so as to be different between at least one color pigment layer out of the plurality of pigment layers of differing colors and another color pigment layer.    
     
     
         2 . The liquid crystal display according to  claim 1 , the pigment layers comprising a red layer, a green layer, and a blue layer, and the dimension of the pigment layer formation area being formed so as to be smaller for the green layer than for the red layer and blue layer.  
     
     
         3 . The liquid crystal display according to  claim 1 , further comprising a transparent film for smoothing a step between the pigment layer formation area and the area where the pigment layers are not provided.  
     
     
         4 . The liquid crystal display according to  claim 1 , the transmissive area being formed by the transflective layer being opened in a window-like manner.  
     
     
         5 . The liquid crystal display according to  claim 1 , band-shaped transparent electrodes being disposed on the inner side of the lower substrate, and the transmissive area of a band shape being formed in the transflective layer by having a transparent electrode pattern width that is formed wider than a transflective layer pattern width.  
     
     
         6 . The liquid crystal display according to  claim 2 , the transflective layer being formed of at least one of aluminum and an aluminum alloy, and the pigment layer containing the blue layer, and the dimension of the pigment layer formation area being provided so as to be smaller for the blue layer than for the red layer.  
     
     
         7 . The liquid crystal display according to  claim 2 , the transflective layer being formed of at least one of silver and a silver alloy, and the pigment layer containing the red layer and the blue layer, and the dimension of the pigment layer formation area being provided so as to be smaller for the red layer than for the blue layer.  
     
     
         8 . The liquid crystal display according to  claim 1 , the color properties of the color filter being adjusted by changing the dimension of the pigment layer formation area.

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