# US 9,519,100 B2 · Apparatus having light guide for illuminating a display unit and for illuminating a patterned region > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,519,100 B2 - Document ID: US9519100B2 - Status: Granted - Kind: B2 - Application number: 14/248,349 - Filed: 2014-04-09 - Published: 2015-04-30 - Granted: 2016-12-13 - Earliest claimed: 2013-10-24 - Assignees: E Ink Holdings Inc. - Applicants: E Ink Holdings Inc. - Inventors: I-Jeng Chen; Sheng-Chieh Tai; Tsai-Wei Shei; Yao-Tsung Shih; Yu-Nan Pao - Web page: https://patentgrep.com/patent/US9519100B2 ## CPC - G02B 6/0093: {Means for protecting the light guide} - G02B 6/0036: {2-D arrangement of prisms, protrusions, indentations or roughened surfaces} - G02B 6/0043: {provided on the surface of the light guide} - G02B 6/0058: {varying in density, size, shape or depth along the light guide} - G02B 6/006: {to produce indicia, symbols, texts or the like} - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS ## Abstract A display apparatus is provided. A display unit has a display region. A protecting cover has a patterned region, wherein the patterned region does not overlap the display region. A light guide plate is disposed between the display unit and the protecting cover and has a first light scattering region and a second light scattering region. The first light scattering region at least partially overlaps the display region, and the second light scattering region at least partially overlaps the patterned region. A light emitting unit emits a light beam to the light guide plate. After the light beam enters the light guide plate, a part of the light beam is scattered to the display region by the first light scattering region and another part of the light beam is scattered to the patterned region by the second light scattering region. ## Claims ### Claim 1 A display apparatus, comprising: a display unit having a display region; a protecting cover having a patterned region, wherein a portion of the protecting cover overlaps the display region and another portion of the protecting cover having the patterned region does not overlap the display region; a light guide plate disposed between the display unit and the protecting cover, and having a first light scattering region and a second light scattering region, wherein the first light scattering region at least partially overlaps the display region, and the second light scattering region at least partially overlaps the patterned region; a light emitting unit emitting a light beam to the light guide plate, wherein a part of the light beam is scattered to the display region by the first light scattering region after entering the light guide plate, and another part of the light beam is scattered to the patterned region by the second light scattering region after entering the light guide plate; a first transparent adhesive layer connecting the light guide plate and the protecting cover; and a second transparent adhesive layer connecting the light guide plate and the display unit, wherein the first transparent adhesive layer and the second transparent adhesive layer are located outside the second light scattering region. ### Claim 2 (depends on 1) The display apparatus of claim 1, wherein the light guide plate comprises a first surface facing the protecting cover, a second surface facing the display unit and an incident surface connecting the first surface and the second surface, and the light beam from the light emitting unit enters the light guide plate through the incident surface. ### Claim 3 (depends on 2) The display apparatus of claim 2, wherein the second light scattering region is located between the first light scattering region and the incident surface. ### Claim 4 (depends on 3) The display apparatus of claim 3, wherein the first light scattering region and the second light scattering region are spaced apart by a distance. ### Claim 5 (depends on 2) The display apparatus of claim 2, wherein the light guide plate comprises: a plurality of first optical microstructures located on the first light scattering region; and a plurality of second optical microstructures located on the second light scattering region. ### Claim 6 (depends on 5) The display apparatus of claim 5, wherein the first optical microstructures are located on the second surface of the light guide plate, and the second optical microstructures are located on the first surface of the light guide plate. ### Claim 7 (depends on 1) The display apparatus of claim 1, wherein the display unit is a reflective display panel. ### Claim 8 (depends on 1) The display apparatus of claim 1, wherein the display unit is an electrophoretic display panel. ### Claim 9 (depends on 1) The display apparatus of claim 1, further comprising a patterned layer located in the patterned region and disposed on a surface of the protecting cover facing the light guide plate. ### Claim 10 (depends on 1) The display apparatus of claim 1, further comprising a touch panel disposed between the protecting cover and the light guide plate, or disposed between the display unit and the light guide plate. ### Claim 11 A display apparatus, comprising: a display unit having a display region; a protecting cover having a patterned region, wherein a portion of the protecting cover overlaps the display region and another portion of the protecting cover having the patterned region does not overlap the display region; a light guide plate disposed between the display unit and the protecting cover, and having a first light scattering region and a second light scattering region, wherein the first light scattering region at least partially overlaps the display region, and the second light scattering region at least partially overlaps the patterned region; a light emitting unit emitting a light beam to the light guide plate, wherein a part of the light beam is scattered to the display region by the first light scattering region after entering the light guide plate, and another part of the light beam is scattered to the patterned region by the second light scattering region after entering the light guide plate; a first transparent adhesive layer connecting the light guide plate and the protecting cover; and a second transparent adhesive layer connecting the light guide plate and the display unit, wherein the first transparent adhesive layer covers the second light scattering region, and the second transparent adhesive layer is located outside the second light scattering region.