Photo-luminescence color liquid crystal display
First Claim
1. A photo-luminescence color liquid crystal display comprising:
- a display panel and a radiation source for generating excitation radiation for operating the display;
wherein the display panel comprises transparent front and back plates;
a liquid crystal disposed between the front and back plates;
a matrix of electrodes defining red, green and blue pixel areas of the display and operable to selectively induce an electric field across the liquid crystal in the pixel areas for controlling transmission of light through the pixels areas;
a red phosphor material which emits red light in response to excitation radiation, the red phosphor material being provided on the back plate corresponding to red pixel areas and a green phosphor material which emits green light in response to excitation radiation, the green phosphor material being provided on the back plate corresponding to green pixel areas.
1 Assignment
0 Petitions
Accused Products
Abstract
A photo-luminescence liquid crystal display 100 comprises: a display panel 104 and a radiation source 102 (blue or UV LED) for generating excitation radiation for operating the display. The display panel 104 comprises transparent front 110 and back 112 plates; a liquid crystal (LC) 114 disposed there between; and a matrix of electrodes 120 (array of thin film transistors) defining red, green and blue pixel areas of the display and operable to selectively induce an electric field across the liquid crystal 114 in the pixel areas for controlling transmission of light through the pixels areas. Red 130 and green 132 phosphor materials are provided on the back plate corresponding to the red and green pixel areas and respectively emit red (R) and green (G) light in response to the excitation radiation. The LCD can further comprise a blue phosphor material 134 on the back plate corresponding to blue pixel areas.
-
Citations
35 Claims
-
1. A photo-luminescence color liquid crystal display comprising:
- a display panel and a radiation source for generating excitation radiation for operating the display;
wherein the display panel comprises transparent front and back plates;
a liquid crystal disposed between the front and back plates;
a matrix of electrodes defining red, green and blue pixel areas of the display and operable to selectively induce an electric field across the liquid crystal in the pixel areas for controlling transmission of light through the pixels areas;
a red phosphor material which emits red light in response to excitation radiation, the red phosphor material being provided on the back plate corresponding to red pixel areas and a green phosphor material which emits green light in response to excitation radiation, the green phosphor material being provided on the back plate corresponding to green pixel areas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
- a display panel and a radiation source for generating excitation radiation for operating the display;
-
33. A photo-luminescence color liquid crystal display comprising:
- a display panel and a radiation source for generating excitation radiation for operating the display;
wherein the display panel comprises transparent front and back plates;
a liquid crystal disposed between the front and back plates;
a matrix of electrodes defining red, green and blue pixel areas of the display and operable to selectively induce an electric field across the liquid crystal in the pixel areas for controlling transmission of light through the pixels areas;
a red phosphor material corresponding to red pixel areas which emits red light in response to excitation radiation and a green phosphor material corresponding to green pixel areas which emits green light in response to excitation radiation, wherein the red phosphor is selected from the group consisting of;
(Sr,Ba,Mg,Al)3SiO5;
Eu,F;
SrSi5−
xAlxOxN8−
x;
Eu;
(Sr,Ba,Ca)2Si5N8;
Eu;
SrS;
Eu;
Sr2Si5N8;
Eu;
Ca2NaMg2V3O12;
Eu3+;
YVO4;
Eu;
Y2O3;
Eu and (Y,Gd)BO3;
Eu.
- a display panel and a radiation source for generating excitation radiation for operating the display;
-
34. A photo-luminescence color liquid crystal display comprising:
- a display panel and a radiation source for generating excitation radiation for operating the display;
wherein the display panel comprises transparent front and back plates;
a liquid crystal disposed between the front and back plates;
a matrix of electrodes defining red, green and blue pixel areas of the display and operable to selectively induce an electric field across the liquid crystal in the pixel areas for controlling transmission of light through the pixels areas;
a red phosphor material corresponding to red pixel areas which emits red light in response to excitation radiation and a green phosphor material corresponding to green pixel areas which emits green light in response to excitation radiation, wherein the green phosphor is selected from the group consisting of;
(Sr,Ba,Mg)2SiO4;
Eu,F;
(Sr,Ba,Ca)2Si5N8;
Eu;
SrSi2N2O2;
Eu;
Y3Al5O12;
Ce;
SrGa2S4;
Eu;
(Ba,Eu)(Mg,Mn)Al10O17;
Na2Gd2B2O7;
Ce;
Na2Gd2(BO3)2O;
Tb;
(Sr,Ba,Ca)2Si5N8;
Eu;
LaPO4;
Ce,Tb;
(Ce,Tb)MgAl11O19;
Zn2SiO4;
Mn; and
Ba0.6Al2O3;
Mn. - View Dependent Claims (35)
- a display panel and a radiation source for generating excitation radiation for operating the display;
Specification