Search

EP-3620900-B1 - DISPLAY DEVICE

EP3620900B1EP 3620900 B1EP3620900 B1EP 3620900B1EP-3620900-B1

Inventors

  • KIM, JONG-HWA
  • LEE, KYUNGSU
  • HAN, Jeongyun

Dates

Publication Date
20260513
Application Date
20190828

Claims (14)

  1. A display device comprising: a window (WP) comprising a light shielding pattern (WP-BZ) and a base layer (WP-BS), the base layer (WP-BS) comprising a light shielding region (WP-NT) in which the light shielding pattern (WP-BZ) is disposed and a transmission region (WP-T) adjacent to the light shielding region (WP-NT); a display panel (DP) disposed under the window (WP); and a capacitive input detection sensor (ISL) disposed between the window (WP) and the display panel (DP), the capacitive input detection sensor (ISL) having a wiring region (IS-NDA) corresponding to the light shielding region (WP-NT) and a sensing region (IS-DA) corresponding to the transmission region (WP-T), a pad region (IS-PA) that is disposed in the wiring region (IS-NDA), wherein the capacitive input detection sensor (ISL) comprises: a first electrode group (EG1) comprising first to i th electrodes (IE1-1 to IE1-i) arranged in a first direction (DR1) away from the pad region (IS-PA) defined on one side of the light shielding region (WP-NT) and extending in a second direction (DR2) intersecting the first direction (DR1), where "i" is a natural number equal to or greater than 2; a second electrode group (EG2) comprising parallel first to j th electrodes (IE2-1 to IE2-j) intersecting with the electrodes of the first electrode group (EG1), where "j" is a natural number equal to or greater than 2; a first signal line group (SG1) comprising first to i th signal lines (SL1-1 to SL1-i) electrically connected to and extending from first pads (IS-PD1) in the pad region (IS-PA) and electrically connected to the first to i th electrodes (IE1-1 to IE1-i) of the first electrode group (EG1); and a second signal line group (SG2) comprising first to j th signal lines (SL2-1 to SL2-j) electrically connected to and extending from second pads (IS-PD2) in the pad region (IS-PA) and electrically connected to the first to j th electrodes (IE2-1 to IE2-j) of the second electrode group (EG2), wherein each of the first to n th signal lines of the first signal line group (SG1), where "n" is a natural number less than i, comprises: a first part (P1) extending from the pad region (IS-PA) in the first direction (DR1); a second part (P2) connected to a corresponding electrode of the first electrode group (EG1); and a third part (P3) disposed between the pad region (IS-PA) and the sensing region (IS-DA), having a shape bent multiple times, and connecting the first part (P1) to the second part (P2), wherein the third part of the first signal line (SL1-1) of the first signal line group (SG1) has a greater length and higher resistance than the third part of the n th signal line (SL1-n) of the first signal line group (SG1) to reduce a deviation of resistance between the first to the nth signal lines (SL1-1 to SL1-n) of the first signal line group (SG1), and wherein at least a portion of the first to n th signal lines of the first signal line group (SG1) overlap the light shielding pattern (WP-BZ) in a planar view in the light shielding region (WP-NT), and at least a portion of the first to m th signal lines of the second signal line group (SG2) overlap the light shielding pattern (WP-BZ) in a planar view in the light shielding region (WP-NT), wherein the third part (P3) of the first signal line of the first signal line group (SG1) comprises: a base part (P100) extending from the first part (P1) in the second direction (DR2); first to k th extension parts (P200) spaced apart from the base part in the first direction (DR1), where "k" is a natural number equal to or greater than 2; and intermediate parts (P300) disposed between the base part and the first extension part, and between the first to k th extension parts the first to k th extension parts become farther away from the base part in a direction from the first extension part to the k th extension part, where "k" is a natural number equal to or greater than 2; wherein the first extension part of the third part (P3) of the first signal line of the first signal line group (SG1) overlaps the light shielding pattern (WP-BZ), and the k th extension part of the third part (P3) of the first signal line of the first signal line group (SG1) does not overlap the shielding pattern in a planar view; and wherein the k th extension part has a greater line width than the first extension part.
  2. The display device of claim 1, wherein resistances of the first to i th signal lines (SL1-1 to SL1-i) of the first signal line group (SG1) are substantially the same.
  3. The display device of claim 1, wherein the third part (P3) of each of the first to n th signal lines of the first signal line group (SG1) overlaps the light shielding pattern (WP-BZ) in a planar view.
  4. The display device of claim 1, wherein the first to j th signal lines (SL2-1 to SL2-j) of the second signal line group (SG2) are respectively connected to one ends of the first to j th electrodes (IE2-1 to IE2-j) of the second electrode group (EG2), and the one ends of the first to j th electrodes (IE2-1 to IE2-j) of the second electrode group (EG2) are on a side of the sensing area (IS-DA) that is closest to the pad region (IS-PA); optionally wherein the first to j th signal lines (SL2-1 to SL2-j) of the second signal line group (SG2) have a greater length than the first to i th signal lines (SL1-1 to SL1-i) of the first signal line group (SG1).
  5. The display device of claim 4, wherein: the j th signal line of the second signal line group (SG2) is disposed farthest away from the first electrode of the second electrode group (EG2) in the second direction (DR2); and the j th signal line of the second signal line group (SG2) comprises first to m th extension parts (P20) arranged in the second direction (DR2) and intermediate parts (P30) disposed between the first to m th extension parts, where "m" is a natural number equal to or greater than 2, wherein each of the first to m th extension parts (P20) of the j th signal line extend in the second direction (DR2), wherein the first to mth extension parts (P20) are disposed closer to the sensing region IS-DA as the order thereof increases, wherein each intermediate part (P30) connects adjacent extension parts of the first to m th extension parts (P20) of the j th signal line; optionally wherein the m th extension part is connected to the j th electrode of the second electrode group (EG2).
  6. The display device of claim 5, wherein the first intermediate part of the j th signal line of the second signal line group (SG2) overlaps the light shielding pattern (WP-BZ).
  7. The display device of any one of claims 1 to 6, wherein: the j th signal line of the second signal line group (SG2) is connected to the j th electrode of the second electrode group (EG2); the j th signal line of the second signal line group (SG2) comprises first to m th extension parts arranged in the second direction (DR2) and intermediate parts disposed between the first to m th extension parts, where "m" is a natural number equal to or greater than 2; and the first to k th extension parts are arranged in one-to-one correspondence with at least a portion of the first to m th extension parts.
  8. The display device of any one of claims 1 to 7, wherein: the j th signal line of the second signal line group (SG2) comprises a first layer disposed under an insulating layer, and a second layer disposed on the insulating layer and connected to the first layer via contact holes penetrating the insulating layer; and the contact holes overlap the intermediate parts or end regions of the extension parts adjacent to the intermediate parts in a planar view.
  9. The display device of any one of claims 1 to 8, wherein: the display panel (DP) comprises a non-display region (DP-NDA) corresponding to the light shielding region (WP-NT) and a display region (DP-DA) corresponding to the transmission region (WP-T); the display region comprises light emission regions (PXA) and non-light emission regions (NPXA) adjacent to the light emission regions; and each of the first to i th electrodes (IE1-1 to IE1-i) has a mesh shape including openings corresponding to the light emission regions.
  10. The display device of any one of claims 1 to 9, wherein: the display panel (DP) comprises a circuit layer (DP-CL), a display element layer (DP-OLED) on the circuit layer, and an upper insulating layer (TFL) on the display element layer; and the capacitive input detection sensor (ISL) is directly disposed on the upper insulating layer.
  11. The display device of any one of claims 1 to 10, wherein each of the first to i th signal lines (SL1-1 to SL1-i) of the first signal line group (SG1) comprises a first titanium layer (ML1), an aluminum layer (ML2) on the first titanium layer (ML1), and a second titanium layer (ML3) on the aluminum layer.
  12. The display device of any one of claims 1 to 11, wherein line widths of the third parts of the first to i th signal lines (SL1-1 to SL1-i) of the first signal line group (SG1) are substantially the same.
  13. The display device of any one of claims 1 to 12, wherein: each of the display panel (DP) and the capacitive input detection sensor (ISL) includes a notch region (NTA) recessed inwardly in a planar view; a length of the first to p th electrodes of the first electrode group (EG1) in the second direction (DR2) is greater than a length of the (p+1) th to i th electrodes of the first electrode group (EG1) in the second direction (DR2), where "p" is a natural number greater than 1 and less than i; and the other ends of the (p+1) th to i th electrodes of the first electrode group (EG1) are adjacent to the notch region; optionally wherein: the first to j th signal lines (SL2-1 to SL2-j) of the second signal line group (SG2) are respectively connected to one ends of the first to j th electrodes (IE2-1 to IE2-j) of the second electrode group (EG2); the one ends of the first to j th electrodes (IE2-1 to IE2-j) of the second electrode group (EG2) are adjacent to the pad region (IS-PA) and are aligned in a row in the second direction (DR2); a length of the first to q th electrodes of the second electrode group (EG2) in the first direction (DR1) is less than a length of the (q+1) th to j th electrodes of the second electrode group (EG2) in the first direction (DR1), where "q" is a natural number greater than 1 and less than j; and the other ends of the first to q th electrodes of the first electrode group (EG1) are adjacent to the notch region.
  14. The display device of any one of claims 1 to 13, wherein: each of the display panel (DP) and the capacitive input detection sensor (ISL) include hole region (HA); the hole region of the display panel (DP) and the hole region of the capacitive input detection sensor (ISL) are aligned in a planar view; and the hole region of the capacitive input detection sensor (ISL) is defined inside the sensing region (IS-DA).

Description

BACKGROUND FIELD Exemplary embodiments of the invention relate generally to a display device, and more specifically, to a display device including an input detection sensor. DISCUSSION OF THE BACKGROUND Various display devices for use in multimedia devices, such as televisions, mobile phones, tablet computers, navigators, game machines, and the like are being developed. Input devices of display devices include a keyboard, a mouse, and the like. Furthermore, display devices include a touch panel as an input device. US 2018182822 discloses a touch sensor including a substrate, an insulating layer, a sensor, and sensing lines. The substrate includes: a sensing region, and a peripheral region at a periphery of the sensing region. The insulating layer is on the substrate. The insulating layer includes contact holes. The sensor is on the substrate and overlaps the sensing region. The sensing lines are on the substrate and overlap the peripheral region. The sensing lines are connected to the sensor. Each of the sensing lines is formed as a multilayer structure. The multilayer structure includes a first electrically conductive layer on the substrate, and a second electrically conductive layer connected to the first electrically conductive layer via a contact hole among the contact holes. Widths of the sensing lines are different from one another. CN108241456 discloses a touch sensing module comprising a substrate, a decoration part, an insulation layer, multiple first electrodes, multiple second electrodes and multiple first bridging parts, wherein the substrate comprises a main part defining a central region and a peripheral region surrounding the central region; the decoration part and the first bridging parts are directly arranged on a first surface of the substrate, the decoration part is located in the peripheral region, and the first bridging parts are arranged in the central region at intervals; the insulation layer is formed on the first surface and covers the decoration part and the first bridging parts; and the first electrodes and the second electrodes are formed on the insulation layer, the first electrodes and the second electrodes are insulated and spaced, every two adjacent first electrodes in the same column are electrically connected through one first bridging part, and the first bridging parts and the decoration part are made of thesame conducting material. US 2017/123574 discloses a sensor including a first electrode including a first sensor element and a second sensor element, a second electrode disposed to be spaced apart from the first sensor element and the second sensor element, a connection line including a first line electrically connected to the first sensor element and a second line electrically connected to the second sensor element, a third electrode disposed around an electrode group including the first electrode, the second electrode and the connection line, and a fourth electrode disposed between the third electrode, and at least plural parts of the first sensor element and the first line. US 2018/157354 discloses touch sensor panel configurations and methods. The configurations and methods can minimize the capacitive coupling and/or resistance of touch electrodes. EP 2985684 discloses a touch panel including a substrate 100,500, first touch electrodes 101,501, each of the first touch electrodes including first mesh patterns 110,510 disposed on the substrate, an insulation layer 200,600 disposed on the first touch electrodes 101,501, second touch electrodes 102,502, disposed on the insulation layer, first auxiliary electrodes 210,610 disposed on the substrate, the first auxiliary electrodes 210,610 each having a mesh shape and being electrically connected to at least a portion of the corresponding touch electrodes 102,502, and second auxiliary electrodes 220,620 disposed on the insulation layer 200,600, the second auxiliary electrodes being electrically connected to at least a portion of the corresponding first mesh patterns 110,510. CN 108241456 discloses a touch sensing module comprising a substrate, a decoration part, an insulation layer, multiple first electrodes, multiple second electrodes and multiple first bridging parts, wherein the substrate comprises a main part defining a central region and a peripheral region surrounding the central region; the decoration part and the first bridging parts are directly arranged on a first surface of the substrate, the decoration part is located in the peripheral region, and the first bridging parts are arranged in the central region at intervals; the insulation layer is formed on the first surface and covers the decoration part and the first bridging parts; and the first electrodes and the second electrodes are formed on the insulation layer, the first electrodes and the second electrodes are insulated and spaced, every two adjacent first electrodes in the same column are electrically connected through one first bridging part, and the fir