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KR-102960914-B1 - DISPLAY DEVICE AND MANUFACTURING METHOD FOR THE SAME

KR102960914B1KR 102960914 B1KR102960914 B1KR 102960914B1KR-102960914-B1

Abstract

A display device according to one embodiment of the present invention comprises a display panel including a first region, a second region, and a bending region disposed between the first region and the second region and having a predetermined radius of curvature; a driving circuit disposed on the display panel and overlapping the second region; and a bending protective layer disposed on the display panel and the driving circuit and overlapping the first region, the bending region, and the second region, wherein the bending protective layer comprises a thermochromic pigment having a light transmittance different depending on the temperature.

Inventors

  • 류태용
  • 박경우
  • 이형주

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260507
Application Date
20210716

Claims (20)

  1. A display panel comprising a first region, a second region, and a bending region disposed between the first region and the second region and having a predetermined radius of curvature; A driving circuit disposed on the above-mentioned display panel and overlapping with the second area; and A bending protection layer disposed on the display panel and the driving circuit and overlapping the first region, the bending region, and the second region, is included. The above bending protective layer is a display device comprising a thermochromic pigment with a light transmittance that varies depending on the temperature.
  2. In Article 1, At a temperature below the first temperature, the light transmittance of the bending protective layer is 1% or less, and A display device in which the light transmittance of the bending protective layer is 50% or more at the first temperature or higher.
  3. In Article 2, The above bending protective layer is a display device that exhibits a first color below the first temperature and is transparent above the first temperature.
  4. In Paragraph 3, The above first color is a display device that is black.
  5. In Article 1, The above thermochromic pigment is a display device in which light transmittance changes reversibly depending on temperature.
  6. In Article 1, The above-mentioned thermochromic pigment is a display device comprising an electron acceptor and an electron donor.
  7. In Article 1, The above-mentioned thermochromic pigment is a display device containing liquid crystal molecules.
  8. In Article 1, The above bending protection layer is a display device that covers the above driving circuit.
  9. In Article 1, It further includes a printed circuit board coupled to the second region of the above-mentioned display panel, and A display device in which the bending protection layer overlaps with at least a portion of the printed circuit board on a planar surface.
  10. In Article 1, It further includes an anti-reflective layer disposed on the above-mentioned display panel and overlapping the first area, and A display device in which the portion overlapping the first region of the display panel in the above bending protection layer is not overlapping with the above anti-reflection layer in a planar manner.
  11. In Article 1, The above display panel includes a first non-folding area, a folding area, and a second non-folding area defined sequentially, and The above folding area is a display device that folds along a folding axis.
  12. A display panel comprising a first region, a second region, and a bending region disposed between the first region and the second region and having a predetermined radius of curvature; A driving circuit disposed on the above-mentioned display panel and overlapping with the second area; and It includes a bending protection layer that overlaps the first region, the bending region, and the second region, is disposed on the display panel, and covers the driving circuit. The above bending protective layer is a display device comprising a reversible thermochromic pigment.
  13. In Article 12, The above-mentioned reversible thermochromic pigment is a display device that is black below a first temperature and transparent above the first temperature.
  14. In Article 12, The above bending protective layer further comprises a base resin, and A display device comprising at least one of an acrylic polymer, a silicone polymer, a urethane polymer, and an imide polymer, wherein the above base resin is a display device.
  15. A method for manufacturing a display device comprising a display panel including a first region, a bending region, and a second region arranged sequentially along one direction, and a driving circuit disposed on the display panel and superimposed on the second region, wherein A step of providing a resin comprising a base resin, a thermochromic pigment, and a photoinitiator to the first region, the bending region, and the second region; A step of forming a preliminary bending protective layer by applying heat to the resin to form a temperature condition above a first temperature; and A method for manufacturing a display device comprising the step of forming a bending protection layer by providing light in a first wavelength region to the above-mentioned preliminary bending protection layer.
  16. In Article 15, A method for manufacturing a display device in which the above-mentioned thermochromic pigment exhibits black at a temperature below the first temperature and is transparent at a temperature above the first temperature.
  17. In Article 15, A method for manufacturing a display device in which the first temperature is 30 ℃ or higher and 80 ℃ or lower.
  18. In Article 15, A method for manufacturing a display device in which the step of forming the above-mentioned preliminary bending protective layer is a step of applying heat to the resin by providing light in a second wavelength region different from the first wavelength region.
  19. In Article 18, The above photoinitiator is a method for manufacturing a display device that is activated in light of the first wavelength region.
  20. In Article 15, A method for manufacturing a display device in which the step of providing the resin is the step of applying the resin to cover the driving circuit.

Description

Display device and manufacturing method for the same The present invention relates to a display device and a method for manufacturing the same, and more specifically, to a display device having a bending protection layer for protecting a bending area and a driving circuit, and a method for manufacturing the same. A display device includes an active area that is activated according to an electrical signal. The display device can detect external inputs through the active area and simultaneously display various images to provide information to the user. Recently, as display devices of various shapes have been developed, active areas with various shapes are being implemented. FIG. 1a is a perspective view of a display device according to one embodiment of the present invention. FIG. 1b is a perspective view of a display device according to one embodiment of the present invention. FIG. 2a is a perspective view of a display device according to one embodiment of the present invention. FIG. 2b is a perspective view of a display device according to one embodiment of the present invention. FIG. 3 is a plan view of a display panel according to one embodiment of the present invention. FIG. 4 is a cross-sectional view of a display panel (DP) according to one embodiment of the present invention. FIGS. 5 and FIGS. 6 are cross-sectional views of a display device according to an embodiment of the present invention. FIG. 7 is a cross-sectional view showing a bending protection layer according to one embodiment. FIGS. 8A and FIGS. 8B are schematic drawings illustrating a thermochromic pigment according to one embodiment of the present invention. FIG. 9 is a flowchart illustrating a method for manufacturing a display device of one embodiment. FIGS. 10a to 10c are schematic drawings illustrating the steps of a method for manufacturing a display device of one embodiment. Hereinafter, embodiments of the present invention will be described with reference to the drawings. In this specification, where a component (or region, layer, part, etc.) is described as being “on,” “connected,” or “joined” another component, it means that it may be directly connected/joined to the other component or that a third component may be placed between them. Identical reference numerals denote identical components. Additionally, in the drawings, the thicknesses, proportions, and dimensions of components are exaggerated for the effective illustration of the technical content. “And/or” includes all one or more combinations that the associated components may define. Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. A singular expression includes a plural expression unless the context clearly indicates otherwise. Additionally, terms such as “below,” “lower,” “above,” and “upper” are used to describe the relationships between the components depicted in the drawings. These terms are relative concepts and are described based on the directions indicated in the drawings. Terms such as "include" or "have" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. In this specification, “direct placement” may mean that there are no additional layers, films, regions, plates, etc. between a part such as a layer, film, region, or plate and another part. For example, “direct placement” may mean that two layers or two members are placed without using additional members such as adhesive members between them. Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Furthermore, terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an overly ideal or overly formal sense unless explicitly defined herein. Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1a is a perspective view of a display device according to an embodiment of the present invention. FIG. 1b is a perspective view of a display device according to an embodiment of the present invention. FIG. 1a shows the display device (DD) in an unfolded state, and FIG. 1b shows the display device (DD) shown in FIG. 1a in a folded state. Referr