# US 2021/0278727 A1 · Dispay panel and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0278727 A1 - Document ID: US20210278727A1 - Status: Published application - Kind: A1 - Application number: 16/623,790 - Filed: 2019-12-03 - Published: 2021-09-09 - Earliest claimed: 2019-12-03 - Assignees: Tcl China Star Optoelectronics Technology Co., Ltd. - Applicants: TCL China Star Optoelectronics Technology Co., Ltd. - Inventors: Miao Zhou; Lixuan Chen - Web page: https://patentgrep.com/patent/US20210278727A1 ## CPC - G02F 1/133617: {Illumination with ultraviolet light; Luminescent elements or materials associated to the cell} - G02F 1/1347: Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells - G02F 1/133601: {for spatial active dimming} - G02F 1/133606: {including a specially adapted diffusing, scattering or light controlling members} - G02F 1/133614: {using photoluminescence, e.g. phosphors illuminated by UV or blue light} - 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 panel and a display device are provided. The display panel includes a first display panel, a quantum dot layer, and a second display panel. The first display panel is disposed opposite to the second display panel, and the quantum dot layer is disposed on a side of the first display panel facing the second display panel. In the above manner, through the first display panel and the second display panel provided by the present application, which enables one of the display panels to achieve dynamic backlighting, while the other display panel displays a picture, and the quantum dot layer is provided between the two display panels, so that the display panel in the present application has the characteristics of high color gamut and wide viewing angles, effectively improving the contrast of the display panel, and it can further significantly increase the transmittance of the display panel. ## Claims ### Claim 1 A display panel, comprising a first display panel, a quantum dot layer, and a second display panel; wherein the first display panel is disposed opposite to the second display panel, and the quantum dot layer is disposed on a side of the first display panel facing the second display panel; wherein the quantum dot layer comprises a resin system formed by mixing red and green quantum dot materials, or a resin system formed by mixing red and green quantum dot materials and light diffusion particles, or a patterned film layer of red and green quantum dots; and wherein the display panel further comprises a light diffusion particle layer, and the light diffusion particle layer is disposed above or below the quantum dot layer. ### Claim 2 A display panel, comprising a first display panel, a quantum dot layer, and a second display panel; wherein the first display panel is disposed opposite to the second display panel, and the quantum dot layer is disposed on a side of the first display panel facing the second display panel. ### Claim 3 (depends on 2) The display panel according to claim 2, further comprising a frame adhesive, wherein the frame adhesive is disposed between the quantum dot layer and a non-display region of the second display panel, and a gap layer is provided between the quantum dot layer and a display region of the second display panel. ### Claim 4 (depends on 3) The display panel according to claim 3, further comprising a water-oxygen isolation layer, wherein the water-oxygen isolation layer is disposed above the quantum dot layer and corresponding to the display region of the second display panel. ### Claim 5 (depends on 2) The display panel according to claim 2, further comprising a refractive layer, wherein the refractive layer is disposed above or below the quantum dot layer. ### Claim 6 (depends on 5) The display panel according to claim 5, wherein the refractive layer is further disposed on a side of the quantum dot layer. ### Claim 7 (depends on 5) The display panel according to claim 5, wherein the refractive layer is a low-refractive layer, and a refractive index of the low-refractive layer is less than refractive indices of the first display panel and the second display panel. ### Claim 8 (depends on 7) The display panel according to claim 7, wherein the low-refractive layer has a refractive index equal to or larger than 1.0 and equal to or less than 1.4. ### Claim 9 (depends on 2) The display panel according to claim 2, wherein the quantum dot layer comprises a resin system formed by mixing red and green quantum dot materials, or a resin system formed by mixing red and green quantum dot materials and light diffusion particles, or a patterned film layer of red and green quantum dots. ### Claim 10 (depends on 2) The display panel according to claim 2, further comprising a light diffusion particle layer, wherein the light diffusion particle layer is disposed above or below the quantum dot layer. ### Claim 11 A display device, comprising a display panel, wherein the display panel comprises a first display panel, a quantum dot layer, and a second display panel, wherein the first display panel and the second display panel are disposed opposite to each other, and the quantum dot layer is disposed on a side of the first display panel facing the second display panel. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the display panel further comprises a frame adhesive, wherein the frame adhesive is disposed between the quantum dot layer and a non-display region of the second display panel, and a gap layer is provided between the quantum dot layer and the display region of the second display panel. ### Claim 13 (depends on 12) The display device according to claim 12, wherein the display panel further comprises a water-oxygen isolation layer, wherein the water-oxygen isolation layer is disposed above the quantum dot layer and corresponding to a display region of the second display panel. ### Claim 14 (depends on 11) The display device according to claim 11, wherein the display panel further comprises a refractive layer, wherein the refractive layer is disposed above or below the quantum dot layer. ### Claim 15 (depends on 14) The display device according to claim 14, wherein the refractive layer is further provided on a side of the quantum dot layer. ### Claim 16 (depends on 14) The display device according to claim 14, wherein the refractive layer is a low-refractive layer, and a refractive index of the low-refractive layer is less than refractive indices of the first display panel and the second display panel. ### Claim 17 (depends on 16) The display device according to claim 16, wherein the low-refractive layer has a refractive index equal to or larger than 1.0 and equal to or less than 1.4. ### Claim 18 (depends on 11) The display device according to claim 11, wherein the quantum dot layer comprises a resin system formed by mixing red and green quantum dot materials, or a resin system formed by mixing red and green quantum dot materials and light diffusion particles, or a patterned film layer of red and green quantum dots. ### Claim 19 (depends on 11) The display device according to claim 11, wherein the display panel further comprises a light diffusion particle layer, and the light diffusion particle layer is disposed above or below the quantum dot layer.