Photoluminescence color display

Patent metadata

Field	Value
Publication number	US-10234725-B2
Application number	US-201615078921-A
Country	US
Kind code	B2
Filing date	Mar 23, 2016
Priority date	Mar 23, 2015
Publication date	Mar 19, 2019
Grant date	Mar 19, 2019

Abstract

A photoluminescence color display comprises a display panel that displays red, green and blue sub-pixel areas, an excitation source operable to generate excitation radiation for operating the display, and a combined layer of photoluminescence materials and filter pigments. The combined layer comprises at least one photoluminescence material, such as a phosphor material or quantum dots, that is operable to emit light corresponding to red, green and blue sub-pixel areas of the display in response to said excitation radiation.

First claim

What is claimed is:

1. A photoluminescence color display comprising:
a display panel comprising a plurality of red, green and blue sub-pixel areas; and
an excitation source operable to generate blue excitation light;
wherein said red sub-pixel areas comprise a mixture of a first photoluminescence material that is operable to emit red light in response to said blue excitation light and a first color filter pigment having a first optical characteristic that allows passage of said blue excitation light to said first photoluminescense material, allows emission of said red light, and substantially prevents emission of green light from said red sub-pixel areas;
said green sub-pixel areas comprise a mixture of a second photoluminescence material that is operable to emit said green light in response to said blue excitation radiation and a second color filter pigment having a second optical characteristic that allows the passage of said blue excitation light to said second photoluminescense material, allows emission of said green light, and substantially prevents emission of said red light from said green sub-pixel areas; and
said blue sub-pixel areas comprise a third color filter pigment having a third optical characteristic that allows the emission of said blue excitation light and substantially prevents emission of said red light and said green light from said blue sub-pixel areas,
wherein the first color filter pigment is magenta and the second color filter pigment is cyan, the red, green and blue sub-pixel areas comprise a combined layer of said photoluminescence materials and color filter pigments, and the photoluminescence color display comprises polarizing layers where the combined layer is located outside of the polarizing layers.

2. The photoluminescence color display of claim 1 , wherein the third color filter pigment is blue.

3. The photoluminescence color display of claim 1 , wherein the photoluminescence materials comprise an inorganic phosphor material.

4. The photoluminescence color display of claim 1 , wherein the photoluminescence materials comprise an organic phosphor material.

5. The photoluminescence color display of claim 1 , wherein the photoluminescence materials comprise quantum dots materials.

6. The photoluminescence color display of claim 5 , wherein the photoluminescence materials comprise cadmium free quantum dots.

7. The photoluminescence color display of claim 5 , wherein said photoluminescence materials comprise quantum dots materials comprise materials selected from the group consisting of: cadmium selenide (CdSe); cadmium zinc selenide (Cd x Zn 1−x Se); cadmium zinc selenide sulfide (CdZnSeS); cadmium selenide sulfide (CdSe x S 1−x ); cadmium telluride (CdTe); cadmium telluride sulfide (CdTe x S 1−x ), cadmium sulfide (CdS), cadmium zinc sulfide (Cd x Zn 1−x ); indium phosphide (InP); indium gallium phosphide (In x Ga 1−x P); indium arsenide (InAs); copper indium sulfide (CuInS 2 ); copper indium selenide (CuInSe 2 ); copper indium sulfide selenide (CuIn x Se 2−x ) copper indium gallium sulfide (CuIn x Ga 1−x S 2 ); copper indium gallium selenide (CuIn x Ga 1−x Se 2 ); copper gallium sulfide (CuGaS 2 ); copper indium aluminum selenide (CuIn x Al 1−x Se 2 ); copper gallium aluminum selenide (CuGa x Al 1−x Se 2 ); copper indium sulfide zinc sulfide (CuInS 2x ZnS 1−x ); and copper indium selenide zinc selenide (CUInSe 2x ZnSe 1−x ).

8. The photoluminescence color display of claim 1 , and further comprising:
a liquid crystal disposed between front and back plates of the display panel; and
a matrix of electrodes defining the red, green and blue sub-pixel areas operable to selectively induce an electric field across the liquid crystal in the sub-pixel areas for controlling transmission of light through the sub-pixels areas.

9. The photoluminescence color display of claim 8 , wherein the photoluminescence materials are located on a face of the back plate.

10. The photoluminescence color display of claim 8 , wherein the photoluminescence materials are located on a face of the front plate.

11. The photoluminescence color display of claim 1 , wherein the blue excitation radiation has a wavelength in a range of 400 nm to 480 nm.

Assignees

• Intematix Corp

Inventors

• Yang Haitao
• Li Yi-Qun

Classifications

• G02B5/201

  in the form of arrays · CPC title

• G02F2202/108

  quantum wells · CPC title

• G02F1/134336

  Matrix · CPC title

• G02F1/133617 Primary

  Illumination with ultraviolet light; Luminescent elements or materials associated to the cell · CPC title

• H01J29/10

  Screens on or from which an image or pattern is formed, picked up, converted or stored · CPC title