Liquid crystal display device
First Claim
1. A liquid crystal display device comprising a display panel including a plurality of pixel regions arranged in matrix on a substrate, a plurality of transistors formed for each pixel region, a plurality of gate lines for connecting gate electrodes of the plurality of transistors, a plurality of data signal lines for connecting first electrodes of the plurality of transistors, a storage capacitor wherein one electrode is connected to a second electrode of said transistor, a storage capacitor line for connecting the other electrode of said storage capacitor, and a liquid crystal layer arranged between one electrode of said pixel region connected to the second electrode of said transistor and the other electrode opposing to the electrode, wherein:
- said storage capacitor is connected to a gate line of the former stage and has the Cs-on-gate structure wherein a storage capacitor is superimposed on the gate line;
a reflection portion and transmission portion are arranged in each of said pixel regions; and
a reflectance of light by the reflection portion of a selected pixel is 1% or more and 30% or less of the light incident thereon for defining an entire display signal range from a lowest value to highest value, and a transmittance of light by the transmission portion of a selected pixel is at most 4% or more and 10% or less of the light incident thereon for defining an entire display signal range from a lowest value to highest value;
wherein the liquid crystal display device includes a polarization plate and further wherein a polarity of a counter potential is inverted for every horizontal scanning period, the display having a resolution of at least 200 ppi, and further wherein the reflection portion extends perpendicularly above a CS formation region, and the reflection portion of each pixel is substantially centrally located over at least one conductive member located at a single outer side edge of the transmission portion and extending substantially along an entire length of the outer side edge of the transmission portion such that each of a plurality of adjacent pixels have corresponding reflective portions with common boundary regions, wherein light amount of the display light is 20 cd/m2 or more and 2000 cd/m2 or less under a condition that irradiation of light of a light source is 500 cd/m2 or on said display panel, and said transistor is a thin film transistor having a semiconductor layer of low temperature polycrystalline silicon, an area of each transmission region is 40% or more of said entire pixel region and an area of each reflection region is 1% or more and 60% or less of said entire pixel region, and further wherein an aperture ratio of each transmission region is 40% or more and less than 100% of said entire pixel region in said pixel region.
2 Assignments
0 Petitions
Accused Products
Abstract
A liquid crystal display device capable of dealing with highly definition display and securing both of transmission type display luminance and reflection type display luminance, wherein the Cs on-gate structure is adopted, and a light reflectance is set to be in a range of 1% or more and 30% or less and a light transmittance is set to be in a range of 4% or more and 10% or less on the display panel formed by arranging in matrix a plurality of pixel regions 4 having a reflection region A for reflection type display by reflection of an ambient light and a transmission region B for transmission type display by transmission of light from a light source provided inside.
14 Citations
5 Claims
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1. A liquid crystal display device comprising a display panel including a plurality of pixel regions arranged in matrix on a substrate, a plurality of transistors formed for each pixel region, a plurality of gate lines for connecting gate electrodes of the plurality of transistors, a plurality of data signal lines for connecting first electrodes of the plurality of transistors, a storage capacitor wherein one electrode is connected to a second electrode of said transistor, a storage capacitor line for connecting the other electrode of said storage capacitor, and a liquid crystal layer arranged between one electrode of said pixel region connected to the second electrode of said transistor and the other electrode opposing to the electrode, wherein:
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said storage capacitor is connected to a gate line of the former stage and has the Cs-on-gate structure wherein a storage capacitor is superimposed on the gate line; a reflection portion and transmission portion are arranged in each of said pixel regions; and a reflectance of light by the reflection portion of a selected pixel is 1% or more and 30% or less of the light incident thereon for defining an entire display signal range from a lowest value to highest value, and a transmittance of light by the transmission portion of a selected pixel is at most 4% or more and 10% or less of the light incident thereon for defining an entire display signal range from a lowest value to highest value; wherein the liquid crystal display device includes a polarization plate and further wherein a polarity of a counter potential is inverted for every horizontal scanning period, the display having a resolution of at least 200 ppi, and further wherein the reflection portion extends perpendicularly above a CS formation region, and the reflection portion of each pixel is substantially centrally located over at least one conductive member located at a single outer side edge of the transmission portion and extending substantially along an entire length of the outer side edge of the transmission portion such that each of a plurality of adjacent pixels have corresponding reflective portions with common boundary regions, wherein light amount of the display light is 20 cd/m2 or more and 2000 cd/m2 or less under a condition that irradiation of light of a light source is 500 cd/m2 or on said display panel, and said transistor is a thin film transistor having a semiconductor layer of low temperature polycrystalline silicon, an area of each transmission region is 40% or more of said entire pixel region and an area of each reflection region is 1% or more and 60% or less of said entire pixel region, and further wherein an aperture ratio of each transmission region is 40% or more and less than 100% of said entire pixel region in said pixel region. - View Dependent Claims (2, 3, 4, 5)
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Specification