# US 2014/0192291 A1 · Liquid Crystal Display Device Including Light Sources Emitting Different Colors > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192291 A1 - Document ID: US20140192291A1 - Status: Published application - Kind: A1 - Application number: 13/900,195 - Filed: 2013-05-22 - Published: 2014-07-10 - Earliest claimed: 2013-01-08 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Jong-Hyuk Kang; Jung-Hyun Kwon; Jae-Byung Park; Dong-Hoon Lee; Hyun-Deok Im; Hyun-Min Cho; Min-Ki Nam - Web page: https://patentgrep.com/patent/US20140192291A1 ## CPC - G02F 1/133621: {providing coloured light (G02F1/133617, G02F1/133533 take precedence)} - G02F 1/133622: {Colour sequential illumination} - G02F 2201/52: RGB geometrical arrangements - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract A display device includes a display panel having a first transparent subpixel, a second transparent subpixel and a third transparent subpixel. A light source part provides light to the display panel. The light source part including a first light source configured to generate red light, a second light source configured to generate green light and a third light source configured to generate blue light. The third light source includes a blue light emitting diode and a wavelength shift layer. The wavelength of the blue light emitted from the third light source has a first peak within a range of about 445 nm to about 450 nm and a second peak within a range of about 450 nm to about 540 nm. ## Claims ### Claim 1 A display device comprising: a display panel including a first transparent subpixel, a second transparent subpixel and a third transparent subpixel; and a light source part providing light to the display panel, and the light source part including a first light source configured to generate red light, a second light source configured to generate green light and a third light source configured to generate blue light, wherein the third light source includes a blue light emitting diode and a wavelength shift layer, and wherein the wavelength of the blue light emitted from the third light source has a first peak within a range of about 445 nm to about 450 nm and a second peak within a range of about 450 nm to about 540 nm. ### Claim 2 (depends on 1) The display device of claim 1, further comprising: a panel driving part configured to set grayscale data for driging the first transparent subpixel, the second transparent subpixel and the third transparent subpixel. ### Claim 3 (depends on 1) The display device of claim 1, further comprising: a light source driving part configured to sequentially activate and deactivate the first light source, the second light source and the third light source. ### Claim 4 (depends on 1) The display device of claim 1, wherein the panel driving part is synchronized with the light source driving part. ### Claim 5 (depends on 1) The display device of claim 1, wherein the wavelength shift layer comprises a matrix and a wavelength shift material dispersed in the matrix. ### Claim 6 (depends on 5) The display device of claim 5, wherein the matrix comprises polystyrene, polyimide, epoxy, silica glass, or silica gel. ### Claim 7 (depends on 5) The display device of claim 5, wherein the wavelength shift material comprises an inorganic fluorescent substance. ### Claim 8 (depends on 7) The display device of claim 7, wherein the inorganic fluorescent substance is Y3Al5O12:Ce. ### Claim 9 (depends on 5) The display device of claim 5, wherein the wavelength shift material comprises a quantum dot. ### Claim 10 (depends on 9) The display device of claim 9, wherein the quantum dot comprises CdSe/ZnS or InP/ZnS. ### Claim 11 A display device comprising: a display panel including a first subpixel having a red color, a second subpixel having a green color and a transparent subpixel; and a light source part providing a light to the display panel and including a first light source configured to generate yellow light, and a second light source configured to generate blue light, wherein the second light source includes a blue light emitting diode, and a wavelength shift layer, and wherein the wavelength of the blue light emitted from the second light source has a first peak within a range of about 445 nm to about 450 nm and a second peak within a range of about 450 nm to about 540 nm. ### Claim 12 (depends on 11) The display device of claim 11, further comprising: a panel driving part configured to set grayscale data of the first subpixel, the second subpixel and the transparent subpixel. ### Claim 13 (depends on 11) The display device of claim 11, further comprising: a light source driving part configured to alternately activate and deactivate the first light source and the second light source. ### Claim 14 (depends on 11) The display device of claim 11, wherein the panel driving part is synchronized with the light source driving part. ### Claim 15 (depends on 11) The display device of claim 11, wherein the wavelength shift layer comprises a matrix and a wavelength shift material dispersed in the matrix. ### Claim 16 (depends on 15) The display device of claim 15, wherein the matrix comprises polystyrene, polyimide, epoxy, silica glass, or silica gel. ### Claim 17 (depends on 15) The display device of claim 15, wherein the wavelength shift material comprises an inorganic fluorescent substance. ### Claim 18 (depends on 17) The display device of claim 17, wherein the inorganic fluorescent substance is Y3Al5O12:Ce. ### Claim 19 (depends on 15) The display device of claim 15, wherein the wavelength shift material comprises a quantum dot. ### Claim 20 (depends on 19) The display device of claim 19, wherein the quantum dot comprises CdSe/ZnS or InP/ZnS. ### Claim 21 A display device comprising: a set of transparent subpixels; and a light source part providing light to the set of transparent subpixels, the light source part including a first light source configured to generate red light, a second light source configured to generate green light and a third light source configured to generate blue light, wherein the third light source includes a blue light emitting diode and a wavelength shift layer configured to shift a wavelength of the blue light to a longer wavelength having a peak within a range of about 445 nm to about 450 inn and a second peak within a range of about 450 nm to about 540 nm.