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KR-102962555-B1 - Display device with multi-layer non-polar liquid and manufacturing method thereof

KR102962555B1KR 102962555 B1KR102962555 B1KR 102962555B1KR-102962555-B1

Abstract

According to the present disclosure, a display device having a multilayer nonpolar liquid and a method for manufacturing the same can be provided, comprising a display panel, a cover window in contact with at least a portion of the display panel, and a multilayer nonpolar liquid layer located between the display panel and the cover window, wherein the multilayer nonpolar liquid layer includes a gap control layer located between the display panel and the cover window and having a film shape, a first nonpolar liquid located between the display panel and the gap control layer, and a second nonpolar liquid located between the gap control layer and the cover window.

Inventors

  • 권순형

Assignees

  • 한국전자기술연구원

Dates

Publication Date
20260508
Application Date
20250228

Claims (14)

  1. Display panel; A cover window that is in contact with at least a portion of the above-mentioned display panel; It includes a multilayer nonpolar liquid layer located between the display panel and the cover window, and The above multilayer nonpolar liquid layer A gap control layer located between the above-mentioned display panel and cover window and having a film shape; A first non-polar liquid located between the display panel and the gap control layer; and It includes a second non-polar liquid located between the gap control layer and the cover window, and The above display panel has a protrusion formed on its upper surface, and The above cover window and the above protrusion come into contact, and The gap control layer above A display device having a multilayer nonpolar liquid located between the display panel and the cover window in an area other than the above-mentioned protrusion.
  2. In claim 1, The above multilayer nonpolar liquid layer A display device having a multilayer nonpolar liquid, further comprising one or more additional gap control layers and additional nonpolar liquids stacked between the second nonpolar liquid and the cover window.
  3. Display panel; A cover window that is in contact with at least a portion of the above-mentioned display panel; It includes a multilayer nonpolar liquid layer located between the display panel and the cover window, and The above multilayer nonpolar liquid layer A gap control layer located between the above-mentioned display panel and cover window and having a film shape; A first non-polar liquid located between the display panel and the gap control layer; and It includes a second non-polar liquid located between the gap control layer and the cover window, and The gap control layer above A display device having a multilayer nonpolar liquid formed from a lipophilic substance that is friendly to the above nonpolar liquid.
  4. In claim 1, The above first nonpolar liquid and second nonpolar liquid are A display device having a multilayer nonpolar liquid connected to each other beyond the edge of the gap control layer.
  5. Display panel; A cover window that is in contact with at least a portion of the above-mentioned display panel; It includes a multilayer nonpolar liquid layer located between the display panel and the cover window, and The above multilayer nonpolar liquid layer A gap control layer located between the above-mentioned display panel and cover window and having a film shape; A first non-polar liquid located between the display panel and the gap control layer; and It includes a second non-polar liquid located between the gap control layer and the cover window, and The gap control layer above A display device having a multilayer nonpolar liquid that displays a color and is visible when mixed with the color displayed on the display panel.
  6. Display panel; A cover window that is in contact with at least a portion of the above-mentioned display panel; It includes a multilayer nonpolar liquid layer located between the display panel and the cover window, and The above multilayer nonpolar liquid layer A gap control layer located between the above-mentioned display panel and cover window and having a film shape; A first non-polar liquid located between the display panel and the gap control layer; and It includes a second non-polar liquid located between the gap control layer and the cover window, and The gap control layer above A display device having a multilayer nonpolar liquid that includes a pattern and is visible by overlapping with an image displayed on the display panel.
  7. delete
  8. In claim 1, The above protrusion A display device having a multilayer nonpolar liquid, comprising a circuit for operating the above-mentioned display panel.
  9. Display panel; A cover window that is in contact with at least a portion of the above-mentioned display panel; It includes a multilayer nonpolar liquid layer located between the display panel and the cover window, and The above multilayer nonpolar liquid layer A gap control layer located between the above-mentioned display panel and cover window and having a film shape; A first non-polar liquid located between the display panel and the gap control layer; and It includes a second non-polar liquid located between the gap control layer and the cover window, and A display device having a multilayer nonpolar liquid, further comprising a lipophilic region coated with a lipophilic material friendly to the nonpolar liquid on the upper surface of the display panel and the lower surface of the cover window.
  10. In claim 1, A display device having a multilayer nonpolar liquid, further comprising a sealing portion located between the display panel and the cover window and surrounding the multilayer nonpolar liquid layer.
  11. In claim 1, The above display panel is Lower substrate; A lower electrode layer formed on the lower substrate; A display layer formed on the lower electrode layer above, on which electrophoretic particles move to display information; An upper electrode layer formed on the above-mentioned display layer; and A display device having a nonpolar liquid, comprising an upper substrate formed on the upper electrode layer.
  12. A step of applying a first non-polar liquid to an area other than a protrusion formed on the upper surface of a display panel; A step of placing a gap control layer on the first nonpolar liquid; A step of applying a second non-polar liquid onto the gap control layer; and A method for manufacturing a display device having a multilayer nonpolar liquid, comprising the step of placing a cover window on the second nonpolar liquid such that the cover window contacts the protrusion.
  13. In claim 12, After the step of applying the second nonpolar liquid, the step of placing an additional gap control layer on the second nonpolar liquid; and The method further includes the step of applying an additional non-polar liquid on the additional gap control layer, A method for manufacturing a display device having a multilayer nonpolar liquid, wherein the step of placing the additional gap control layer and the step of applying the additional nonpolar liquid are performed alternately one or more times.
  14. A step of applying a first nonpolar liquid to the upper surface of a display panel; A step of placing a gap control layer on the first nonpolar liquid; A step of applying a second non-polar liquid onto the gap control layer; and The method includes the step of placing a cover window on the second nonpolar liquid, and Prior to the step of applying a first non-polar liquid to the upper surface of the display, the step of coating a lipophilic material on the upper surface of the display; and A method for manufacturing a display device having a multilayer nonpolar liquid, further comprising the step of coating a lipophilic material on the lower surface of the cover window prior to the step of placing the cover window.

Description

Display device with multi-layer non-polar liquid and manufacturing method thereof The present disclosure relates to a display device having a multilayer nonpolar liquid and a method for manufacturing the same. Various types of display devices are utilized, including Liquid Crystal Displays (LCDs), Organic Light-Emitting Diodes (OLEDs), MicroLEDs, and Electrophoretic Displays. A display device consists of a display panel that displays information and a cover window that protects the display panel. An air gap may be formed between the display panel and the cover window. The difference in refractive index between the cover window, the air gap, and the display panel can cause a decrease in visibility. FIG. 1 is a drawing showing a display device having a multilayer nonpolar liquid according to one embodiment. FIG. 2 is an exploded perspective view of a display device having a multilayer nonpolar liquid according to one embodiment. Figure 3 is a cross-sectional view along A-A' of Figure 1. Figure 4 is a drawing showing a display device in which a gap control layer does not exist as a comparative example. FIG. 5 is a cross-sectional view of a display device having a multilayer nonpolar liquid including a plurality of gap control layers according to one embodiment. FIG. 6 is a cross-sectional view of a display device having a multilayer nonpolar liquid including a small gap control layer according to one embodiment. FIG. 7 is a cross-sectional view of a display device having a multilayer nonpolar liquid without protrusions on a display panel according to one embodiment. FIG. 8 is an exploded perspective view of a display device having a multilayer nonpolar liquid including a gap control layer having a color or pattern according to one embodiment. FIG. 9 is an exploded perspective view of a display device having a multilayer nonpolar liquid further comprising a lipophilic region according to one embodiment. FIG. 10 is an exploded perspective view of a display device having a multilayer nonpolar liquid further comprising a sealing portion according to one embodiment. FIG. 11 is a cross-sectional view of a display device having a multilayer nonpolar liquid further comprising a sealing portion according to one embodiment. FIG. 12 is a drawing illustrating a method for manufacturing a display device having a multilayer nonpolar liquid according to one embodiment. FIG. 13 is a drawing illustrating a method for manufacturing a display device having a multilayer nonpolar liquid further comprising a lipophilic region according to one embodiment. Hereinafter, the present disclosure will be described in detail (with reference to the attached drawings). However, this is merely illustrative and the present disclosure is not limited to the specific embodiments described illustratively. FIG. 1 is a drawing showing a display device (1) having a multilayer nonpolar liquid according to one embodiment. FIG. 2 is an exploded perspective view of a display device (1) having a multilayer nonpolar liquid according to one embodiment. FIG. 3 is a cross-sectional view along A-A' of FIG. 1. A display device (1) having a multilayer nonpolar liquid may include a display panel (10), a cover window (20) that is in contact with at least a portion of the display panel (10), and a multilayer nonpolar liquid layer (30) located between the display panel (10) and the cover window (20). The multilayer nonpolar liquid layer (30) may include a gap control layer (40) which is in the shape of a film and is located between the display panel (10) and the cover window (20), a first nonpolar liquid (51) located between the display panel (10) and the gap control layer (40), and a second nonpolar liquid (52) located between the gap control layer (40) and the cover window (20). The display panel (10) can display letters, numbers, characters, pictures, colors, images, and other information. The display panel (10) may include light reflective type panels such as electrophoretic displays, electrochromic displays, electrowetting displays, toner displays, and reflective liquid-crystal displays, as well as light emissive type displays such as LCDs, PDPs, OLEDs, LEDs, and QD-LEDs. A cover window (20) may be positioned at the outermost part of the display device (1) to protect the display panel (10). Information may be displayed externally through the upper surface (20a) of the cover window (20). The cover window (20) may include a glass plate, a synthetic resin plate, etc., that protects the display panel (10). The cover window (20) can protect the display panel (10) from direct impact. The cover window (20) can protect the display panel (10) from direct contact with moisture, contaminants, etc. A multilayer nonpolar liquid layer (30) may be located between the display panel (10) and the cover window (20). The multilayer nonpolar liquid layer (30) may include a gap control layer (40) and a first nonpolar liquid (51) and a second nonpolar liquid (52) located on the lower