# US 2014/0192515 A1 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192515 A1 - Document ID: US20140192515A1 - Status: Published application - Kind: A1 - Application number: 13/862,024 - Filed: 2013-04-12 - Published: 2014-07-10 - Earliest claimed: 2013-01-07 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Sang Il KIM - Web page: https://patentgrep.com/patent/US20140192515A1 ## CPC - G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)} - G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)} - 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 plurality of selective light transmitting regions through which light can be controllably transmitted and one or more light blocking regions. It further includes a backlighting unit disposed and configured to supply backlighting light to the display panel and a backlighting light changing layer configured to change one or more optical characteristics (e.g., polarization) of light passed therethrough. The display device further includes a reflection pattern layer disposed between the backlighting light changing layer and the backlighting unit and including a plurality of light-passing regions configured to let light pass therethrough and one or more reflection portions configured to reflect light, where the reflection portions are disposed to intercept, and reflect light coming from the backlighting unit and heading forward to a corresponding one or more of the light blocking regions of the display panel back to the backlighting unit. ## Claims ### Claim 1 A display device comprising: a display panel including a plurality of selective light transmitting regions through which light can be controllably transmitted for viewing by a forward disposed user of the display device and one or more light blocking regions through which light is not transmitted forward for viewing by the user; a backlighting unit disposed and configured to supply backlighting light to the display panel, the backlighting unit including a light returning mechanism that is configured to return forward and toward the display panel, light received in a backward heading direction, for example from the display panel; and a reflection pattern layer disposed between the backlighting light changing layer and the backlighting unit and including a plurality of light-passing regions configured to let light pass therethrough and one or more reflection portions configured to reflect light; wherein the one or more reflection portions are disposed to intercept, and reflect backwards, light coming from the backlighting unit and heading forward to a corresponding one or more of the light blocking regions of the display panel, and wherein the plurality of light-passing regions are disposed to let therethrough light coming from the backlighting unit and heading forward toward a corresponding one of the selective light transmitting regions of the display panel. ### Claim 2 (depends on 1) The display device of claim 1, further comprising a backlighting light changing layer configured to change one or more optical characteristics of light passed therethrough, the backlighting light changing layer being interposed between the display panel and the backlighting unit, the backlighting light changing layer including a polarizer configured to change a polarization characteristic of light passed therethrough. ### Claim 3 (depends on 2) The display device of claim 2, further comprising a lower film on which the reflection pattern layer is formed. ### Claim 4 (depends on 3) The display device of claim 3, wherein the lower film has birefringence. ### Claim 5 (depends on 4) The display device of claim 4, wherein the reflection pattern layer is positioned between the lower film and the display panel. ### Claim 6 (depends on 5) The display device of claim 5, wherein a width of a reflection part of the reflection pattern layer that intercepts light headed toward a corresponding light blocking region is less than a width of the corresponding light blocking region. ### Claim 7 (depends on 6) The display device of claim 6, wherein the light returning mechanism of the backlighting unit includes a reflection surface disposed to reflect light toward the display panel. ### Claim 8 (depends on 7) The display device of claim 7, wherein the display panel includes a reflective layer configured to reflect light backward and toward the reflection pattern layer. ### Claim 9 (depends on 3) The display device of claim 3, wherein the lower film does not have birefringence. ### Claim 10 (depends on 9) The display device of claim 9, wherein the lower film is positioned between the reflection pattern layer and the display panel. ### Claim 11 (depends on 10) The display device of claim 10, wherein a width of a reflection part of the reflection pattern layer that intercepts light headed toward a corresponding light blocking region is less than a width of the corresponding light blocking region. ### Claim 12 (depends on 11) The display device of claim 11, wherein the light returning mechanism of the backlighting unit includes a reflection surface disposed to reflect light toward the display panel. ### Claim 13 (depends on 12) The display device of claim 12, wherein the display panel includes a reflective layer configured to reflect light backward and toward the reflection pattern layer. ### Claim 14 (depends on 2) The display device of claim 2, wherein a width of a reflection part of the reflection pattern layer that intercepts light headed toward a corresponding light blocking region is less than a width of the corresponding light blocking region. ### Claim 15 (depends on 14) The display device of claim 14, wherein the light returning mechanism of the backlighting unit includes a reflection surface disposed to reflect light toward the display panel. ### Claim 16 (depends on 15) The display device of claim 15, wherein the display panel includes a reflective layer configured to reflect light backward and toward the reflection pattern layer. ### Claim 17 (depends on 16) The display device of claim 16, wherein the plurality of light-passing regions of the reflection pattern layer are arranged in a matrix format. ### Claim 18 (depends on 16) The display device of claim 16, wherein the one or more reflection portions of the of the reflection pattern layer are arranged as a series of spaced apart stripes. ### Claim 19 (depends on 1) The display device of claim 1, wherein the backlighting light changing layer comprises a plurality of polarizer pieces that are coplanar with the reflection pattern layer such that the polarizer pieces are positioned in the light-passing regions of the reflection pattern layer. ### Claim 20 (depends on 19) The display device of claim 19, wherein the reflection portion of the reflection pattern layer has a mesh shape or a shape of a plurality of spaced apart stripes. ### Claim 21 One or more of inventions disclosed here within (and within any parent of this application) as such one or more disclosed inventions are taken alone or in combinations one with at least another, where such one or more disclosed inventions are incorporated here-at and thus contained and defined (bounded) by this claim.