Transflective pixel structure in LCD panel and method for fabricating the same
A transflective pixel structure in a liquid crystal display panel comprises lower and upper substrates opposing each other and a liquid crystal layer disposed therebetween. The lower substrate comprises a reflective region and an adjacent transmissive region. A protrusion is formed on the surface of the upper substrate facing and corresponding to the low substrate of the reflective region, wherein an edge of the protrusion defines a transition from the reflective region to the transmissive region, wherein such edge extends along a first direction. An alignment film covers the protrusion and the upper substrate, and is rubbed along a second direction parallel to the first direction or extending from the reflective region to the transmissive region to intersect with the first direction. A liquid crystal layer is disposed between the lower and upper substrates.
1 . A transflective pixel structure in a liquid crystal display panel, comprising:
a lower substrate comprising a reflective region and an adjacent transmissive region;
an upper substrate opposite the lower substrate;
a protrusion formed on the surface of the upper substrate facing and corresponding to the low substrate of the reflective region, wherein an edge of the protrusion defines a transition from the reflective region to the transmissive region, wherein such edge extends along a first direction;
an alignment film covering the protrusion and the upper substrate, and rubbed along a second direction, wherein the second direction is parallel to the first direction or extends from the reflective region to the transmissive region to intersect with the first direction; and
a liquid crystal layer disposed between the lower and upper substrates.
2 . The pixel structure as claimed in claim 1 , further comprising a color filter disposed between the upper substrate and the protrusion.
3 . The pixel structure as claimed in claim 1 , wherein the second direction intersects with the second direction to form an angle less than 30°.
4 . The pixel structure as claimed in claim 1 , wherein the protrusion is rectangular from the top view.
5 . The pixel structureas claimed in claim 1 , wherein the protrusion is triangular from the top view.
6 . The pixel structure as claimed in claim 1 , wherein the transflective thin film transistor liquid crystal display device further comprises a transparent electrode disposed on the lower substrate of the transmissive region.
7 . The pixel structure as claimed in claim 1 , wherein the transflective thin film transistor liquid crystal display device further comprises a reflective electrode disposed on the lower substrate of the reflective region.
8 . The pixel structrure as claimed in claim 1 , wherein the protrusion comprises silicon oxide, silicon nitride or a combination thereof.
9 . A liquid crystal display panel comprising an array of pixel structures each as claimed in claim 1 , and a plurality of scan lines and data lines operatively coupled to the array of pixel structures.
10 . A display device, comprising the liquid crystal display panel as claimed in claim 9 .
11 . An electronic device, comprising:
the liquid crystal display device as claimed in claim 10 ; and
a control unit operatively coupled to the liquid crystal display device to provide input to the liquid crystal display device for displaying images.
12 . The electronic device as claimed in claim 11 , wherein the electronic device comprises a laptop computer, a mobile phone, a digital camera, a personal digital assistant, a desktop computer, a television, a car display or a portable DVD player.
13 . A method for fabricating a transflective pixel structure in a liquid crystal display panel, the method comprising:
providing a lower substrate comprising a reflective region and an adjacent transmissive region;
providing an upper substrate opposite the lower substrate;
forming a protrusion on the surface of the upper substrate facing and corresponding to the low substrate of the reflective region, wherein an edge of the protrusion defines a transition from the reflective region to the transmissive region, wherein the edge extends along a first direction;
forming an alignment film on the protrusion and the upper substrate;
rubbing the alignment film along a second direction parallel to the first direction or extending from the reflective region to the transmissive region to intersect with the first direction; and
forming a liquid crystal layer between the lower and upper substrates;
14 . The method as claimed in claim 13 , further forming a color filter between the upper substrate and the protrusion.
15 . The method as claimed in claim 13 , wherein the second direction intersects with the second direction to form an angle less than 30°.
16 . The method as claimed in claim 13 , wherein the protrusion is rectangular from the top view.
17 . The method as claimed in claim 13 , wherein the protrusion is triangular from the top view.
18 . The method as claimed in claim 13 , further forming a transparent electrode on the lower substrate of the transmissive region.
19 . The method as claimed in claim 13 , further forming a reflective electrode on the lower substrate of the reflective region.
20 . The method as claimed in claim 13 , wherein the protrusion comprises silicon oxide, silicon nitride or a combination thereof.