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US-20260126685-A1 - DISPLAY DEVICE

US20260126685A1US 20260126685 A1US20260126685 A1US 20260126685A1US-20260126685-A1

Abstract

A display device includes a first substrate having a display area and a non-display area, a first wire placed in the display area and composed of a first conducting film, a heating wire placed in the display area and composed of the first conducting film, a first connected portion placed in the non-display area, composed of the first conducting film, and connected to the heating wire, a second connected portion placed in the non-display area with the first connected portion between the second connected portion and the first wire and composed of the first conducting film, a first insulating film, and a third connected portion placed in the non-display area and composed of a second conducting film. The first insulating film is provided with a first contact hole overlapping the first wire and the third connected portion and a second contact hole overlapping the second and third connected portions.

Inventors

  • Hiroshi Matsukizono

Assignees

  • Sharp Display Technology Corporation

Dates

Publication Date
20260507
Application Date
20250926
Priority Date
20241107

Claims (12)

  1. 1 . A display device comprising: a first substrate having a display area where an image is displayed and a non-display area where the image is not displayed; a first wire that is placed in the display area of the first substrate, that extends along a first direction, and that is composed of part of a first conducting film; a heating wire that is placed in the display area of the first substrate, that extends along the first direction, and that is composed of a portion of the first conducting film that is different from the first wire; a first connected portion that is placed in the non-display area of the first substrate, that extends along a second direction intersecting the first direction, that is composed of a portion of the first conducting film that is different from the first wire and the heating wire, and that is connected to the heating wire; a second connected portion that is placed in the non-display area of the first substrate with the first connected portion interposed between the second connected portion and the first wire and that is composed of a portion of the first conducting film that is different from the first wire, the heating wire, and the first connected portion; a first insulating film placed at a higher layer than the first conducting film; and a third connected portion that is placed in the non-display area of the first substrate, that is composed of part of a second conducting film placed at a higher layer than the first insulating film, and that passes transversely across the first connected portion and overlaps part of the first wire and part of the second connected portion, wherein the first insulating film is provided with a first contact hole placed in such a position as to overlap both the first wire and the third connected portion and a second contact hole placed in such a position as to overlap both the second connected portion and the third connected portion.
  2. 2 . The display device according to claim 1 , further comprising a first electrode disposed to overlap at least part of the first wire and at least part of the heating wire, not connected to the heating wire, and connected to the first wire.
  3. 3 . The display device according to claim 2 , wherein the first electrode is composed of a portion of the second conducting film that is different from the third connected portion, and the first insulating film is provided with a third contact hole placed in such a position as to overlap both the first wire and the first electrode.
  4. 4 . The display device according to claim 3 , further comprising: a second insulating film placed at a higher layer than the second conducting film; a pixel electrode that is composed of part of a third conducting film placed at a higher layer than the second insulating film and that is disposed to overlap part of the first electrode; a third insulating film placed at a lower layer than the first conducting film; a source wire composed of part of a fourth conducting film placed at a lower layer than the third insulating film; a source electrode joined to the source wire; a drain electrode composed of a portion of the fourth conducting film that is different from the source wire and the source electrode; a fourth insulating film placed at a lower layer than the fourth conducting film; a semiconductor component that is composed of part of a semiconductor film placed at a lower layer than the fourth insulating film and that is disposed to overlap the source electrode and the drain electrode; a fourth connected portion composed of a portion of the first conducting film that is different form the first wire, the heating wire, the first connected portion, and the second connected portion and disposed to overlap the drain electrode; and a fifth connected portion composed of a portion of the second conducting film that is different from the third connected portion and the first electrode and disposed to overlap both the fourth connected portion and the pixel electrode, wherein the first wire is configured to transmit at least a common potential signal, the fourth insulating film is provided with a fourth contact hole placed in such a position as to overlap both the source electrode and the semiconductor component and a fifth contact hole placed in such a position as to overlap both the drain electrode and the semiconductor component, the third insulating film is provided with a sixth contact hole placed in such a position as to overlap both the drain electrode and the fourth connected portion, the first insulating film is provided with a seventh contact hole placed in such a position as to overlap both the fourth connected portion and the fifth connected portion, and the second insulating film is provided with an eighth contact hole placed in such a position as to overlap both the fifth connected portion and the pixel electrode.
  5. 5 . The display device according to claim 4 , wherein the source wire extends along the first direction and comprises a plurality of the source wires placed at spacings in the second direction, the first wire is disposed to overlap a first source wire included in the plurality of source wires, and the heating wire is disposed to overlap a second source wire included in the plurality of source wires.
  6. 6 . The display device according to claim 5 , wherein the first insulating film and the third insulating film are greater in film thickness than the second insulating film.
  7. 7 . The display device according to claim 2 , further comprising: a second insulating film placed at a higher layer than the second conducting film; and a sixth connected portion composed of a portion of the second conducting film that is different from the third connected portion and disposed to overlap part of the first wire and part of the first electrode, wherein the first electrode is composed of part of a third conducting film placed at a higher layer than the second insulating film, the first insulating film is provided with a ninth contact hole placed in such a position as to overlap both the first wire and the sixth connected portion, and the second insulating film is provided with a tenth contact hole placed in such a position as to overlap both the sixth connected portion and the first electrode.
  8. 8 . The display device according to claim 7 , further comprising: a pixel electrode composed of a portion of the second conducting film that is different from the third connected portion and the sixth connected portion; a third insulating film disposed to overlap the pixel electrode and placed at a lower layer than the first conducting film; a source wire composed of part of a fourth conducting film placed at a lower layer than the third insulating film; a source electrode joined to the source wire; a drain electrode composed of a portion of the fourth conducting film that is different from the source wire and the source electrode; a fourth insulating film placed at a lower layer than the fourth conducting film; a semiconductor component that is composed of part of a semiconductor film placed at a lower layer than the fourth insulating film and that is disposed to overlap the source electrode and the drain electrode; and a fourth connected portion composed of a portion of the first conducting film that is different from the first wire, the heating wire, the first connected portion, and the second connected portion and disposed to overlap the drain electrode, wherein the first wire is configured to transmit at least a common potential signal, the fourth insulating film is provided with a fourth contact hole placed in such a position as to overlap both the source electrode and the semiconductor component and a fifth contact hole placed in such a position as to overlap both the drain electrode and the semiconductor component, the third insulating film is provided with a sixth contact hole placed in such a position as to overlap both the drain electrode and the fourth connected portion, and the first insulating film is provided with an eleventh contact hole placed in such a position as to overlap both the fourth connected portion and the pixel electrode.
  9. 9 . The display device according to claim 8 , wherein the source wire extends along the first direction and comprises a plurality of the source wires placed at spacings in the second direction, the first wire is disposed to overlap a first source wire included in the plurality of source wires, and the heating wire is disposed to overlap a second source wire included in the plurality of source wires.
  10. 10 . The display device according to claim 9 , wherein the first insulating film and the third insulating film are greater in film thickness than the second insulating film.
  11. 11 . The display device according to claim 1 , wherein the first wire transmits a common potential signal and a position detection signal in a time-division manner.
  12. 12 . The display device according to claim 1 , further comprising: a second substrate placed opposite the first substrate at a distance from the first substrate; and a liquid crystal layer sandwiched between the first substrate and the second substrate.

Description

BACKGROUND 1. Field The present disclosure relates to a display device that makes it hard for a heating wire and a first wire to become short-circuited with each other and that makes it hard for the heating wire to become markedly higher in temperature. 2. Description of the Related Art Conventionally, as an example of a display device, a liquid crystal display device disclosed in U.S. Patent Application Publication No. 2004/0207588 has been known. The liquid crystal display device disclosed in U.S. Patent Application Publication No. 2004/0207588 includes a liquid crystal panel, a memory in which current data representing the present brightness of each pixel provided in the liquid crystal panel is stored until the next time, a look-up table having stored in advance therein (i) combinations of the previous data and the present data, inputtable combinations, and (ii) output signals corresponding separately to each of the combinations, a control unit that outputs an output signal as corrected present data to make it easy to make a shift in grayscale from the previous time to the present time, a heater that heats the liquid crystal panel, a heater control unit that controls the start and stoppage of heating by the heater so that the temperature of the liquid crystal panel falls within a range of ±3° C. from a predetermined target temperature falling within a range of 33° C. to 63° C. In the liquid crystal display device disclosed in U.S. Patent Application Publication No. 2004/0207588, the heater is configured such that a heater electrode composed of a transparent electrode film and a metal electrode are connected to each other. Since there occurs contact resistance in a place of connection between the heater electrode and the metal electrode, the place of contact may become markedly higher in temperature due to the connection resistance. On the other hand, it has been difficult for the heater electrode and the metal electrode to be constituted by the same metal material, as there is concern that they may become short-circuited with other electrodes or wires provided in the liquid crystal panel. It is desirable to make it hard for a heating wire and a first wire to become short-circuited with each other and make it hard for the heating wire to become markedly higher in temperature. SUMMARY According to an aspect of the disclosure, there is provided a display device including a first substrate having a display area where an image is displayed and a non-display area where the image is not displayed, a first wire that is placed in the display area of the first substrate, that extends along a first direction, and that is composed of part of a first conducting film, a heating wire that is placed in the display area of the first substrate, that extends along the first direction, and that is composed of a portion of the first conducting film that is different from the first wire, a first connected portion that is placed in the non-display area of the first substrate, that extends along a second direction intersecting the first direction, that is composed of a portion of the first conducting film that is different from the first wire and the heating wire, and that is connected to the heating wire, a second connected portion that is placed in the non-display area of the first substrate with the first connected portion interposed between the second connected portion and the first wire and that is composed of a portion of the first conducting film that is different from the first wire, the heating wire, and the first connected portion, a first insulating film placed at a higher layer than the first conducting film, and a third connected portion that is placed in the non-display area of the first substrate, that is composed of part of a second conducting film placed at a higher layer than the first insulating film, and that passes transversely across the first connected portion and overlaps part of the first wire and part of the second connected portion. The first insulating film is provided with a first contact hole placed in such a position as to overlap both the first wire and the third connected portion and a second contact hole placed in such a position as to overlap both the second connected portion and the third connected portion. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a liquid crystal panel, a flexible substrate, a control substrate, or other components of a liquid crystal display device according to Embodiment 1; FIG. 2 is a cross-sectional view of the liquid crystal panel, the flexible substrate, the control substrate, or other components according to Embodiment 1; FIG. 3 is a circuit diagram showing an electrical configuration of an array substrate constituting the liquid crystal panel according to Embodiment 1; FIG. 4 is a plan view showing a configuration pertaining to a touch panel function and a configuration pertaining to a heater function of the array substrate according to Embodiment 1