Search

KR-102963821-B1 - DISPLAY DECVICE

KR102963821B1KR 102963821 B1KR102963821 B1KR 102963821B1KR-102963821-B1

Abstract

A display device according to one embodiment of the present invention includes a display panel, a sensor located on one side of the display panel, and a color-changing layer located on the other side of the display panel, wherein the transmittance of the color-changing layer for light with a wavelength of 600 nm to 630 nm varies by 5 to 20 times depending on the presence or absence of ultraviolet rays.

Inventors

  • 이상구
  • 유준우
  • 김온누리
  • 변호연
  • 손영혜

Assignees

  • 삼성디스플레이 주식회사

Dates

Publication Date
20260512
Application Date
20191224

Claims (20)

  1. Display panel; A sensor located on one side of a display panel; It includes a discoloration layer located on the other side of the display panel, and The above-mentioned color-changing layer has a transmittance of less than 10% for light with a wavelength of 600 nm to 630 nm in the presence of ultraviolet light, and A display device having a transmittance of 80% or more for light with a wavelength of 600 nm to 630 nm when ultraviolet light is not present.
  2. delete
  3. In paragraph 1, The above sensor is a display device that is an optical fingerprint recognition sensor.
  4. In paragraph 1, The above-mentioned discoloration layer is a display device comprising a Fulgides-type substance or a Diarylethenes-type substance.
  5. In paragraph 1, It includes a window located on one side of the above-mentioned display panel, and The above-mentioned discoloration layer is a display device located between the above-mentioned display panel and the window.
  6. In paragraph 5, A display device further comprising an adhesive layer located between the above-mentioned discoloration layer and the above-mentioned display panel.
  7. In paragraph 1, It includes a window located on one side of the above-mentioned display panel, and The above window is a display device located between the above display panel and the above color-changing layer.
  8. In paragraph 1, It further includes a hard coating layer located on one surface of the above-mentioned discoloration layer, and The above-mentioned discoloration layer is a display device located between the above-mentioned hard coating layer and the above-mentioned display panel.
  9. In paragraph 1, The above-mentioned color-changing layer is a display device having an adhesive function containing an adhesive material.
  10. In paragraph 1, The above-mentioned color-changing layer is a display device having a transmittance of 90% or more for visible light indoors.
  11. In paragraph 1, The above-mentioned discoloration layer blocks the transmission of near-infrared rays outdoors, and A display device that transmits near-infrared rays indoors.
  12. Display panel; A sensor located on one side of a display panel; It includes a color-changing layer located between the sensor and the display panel, The above-mentioned color-changing layer has a transmittance of less than 10% for light with a wavelength of 600 nm to 630 nm in the presence of ultraviolet light, and A display device having a transmittance of 80% or more for light with a wavelength of 600 nm to 630 nm when ultraviolet light is not present.
  13. delete
  14. In Paragraph 12, The above sensor is a display device that is an optical fingerprint recognition sensor.
  15. In Paragraph 12, The above-mentioned discoloration layer is a display device comprising a Fulgides-type substance or a Diarylethenes-type substance.
  16. In Paragraph 12, A display device further comprising an adhesive layer located between the above-mentioned discoloration layer and the above-mentioned sensor.
  17. In Paragraph 12, A display device further comprising an adhesive layer located between the above-mentioned discoloration layer and the above-mentioned display panel.
  18. In Paragraph 12, The above-mentioned color-changing layer is a display device having an adhesive function containing an adhesive material.
  19. In Paragraph 12, The above-mentioned color-changing layer is a display device having a transmittance of 90% or more for visible light indoors.
  20. In Paragraph 12, The above-mentioned discoloration layer blocks the transmission of near-infrared rays outdoors, and A display device that transmits near-infrared rays indoors.

Description

Display Device The present disclosure relates to a display device, and more specifically, to a display device with improved performance of a fingerprint recognition sensor. Display devices such as liquid crystal displays (LCDs) and organic light emitting diode displays (OLEDs) include a display panel comprising a plurality of pixels capable of displaying an image. Each pixel includes a pixel electrode that receives a data signal, and the pixel electrode is connected to at least one transistor to receive the data signal. Display devices can display images using pixels (or pixel circuits). Recently, various display devices with functions other than image display are being developed. The display device includes an optical element on the bezel (or border portion) of the front of the display device (e.g., one side on which an image is displayed), and can recognize an object using the optical element. For example, if the optical element is a fingerprint detection sensor, it receives reflected light reflected by a finger through a light-emitting element and can recognize a fingerprint by recognizing the difference in the amount of reflection caused by the curvature of the fingerprint. Meanwhile, as the bezel of a display device becomes thinner, the user's gaze may be fixed or focused on the image (or the screen of the display device). Recently, research and development have been conducted on front display technology that eliminates the bezel on the front of the display device, relocates optical components (sensors) that were placed on the front (or bezel), and displays an image across the entire front of the display device. FIG. 1 briefly illustrates a cross-section of a display device according to one embodiment of the present invention. FIG. 2 illustrates the spectral change according to the absorption of ultraviolet rays by a color-changing layer according to one embodiment of the present invention. Figure 3 illustrates a sensor of a display device that does not include a discoloration layer. Figure 4 illustrates a cross-section of a display device in which a near-infrared cutting layer is located between a display panel and a sensor. Figures 5 to 8 show the correlation between the cutting wavelength and the detection performance of the optical fingerprint recognition sensor using a cutting filter that cuts various wavelengths. FIG. 9 shows the same cross-section as FIG. 1 in a display device according to another embodiment. FIG. 10 shows the same cross-section as FIG. 1 in a display device according to another embodiment. FIG. 11 shows the same cross-section as FIG. 10 for a display device according to another embodiment. FIG. 12 shows the same cross-section as FIG. 1 in a display device according to another embodiment. FIG. 13 shows the same cross-section as FIG. 12 in a different display device in another embodiment. FIG. 14 shows the same cross-section as FIG. 12 in a display device according to another embodiment. Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification. Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings. Furthermore, when it is said that a part, such as a layer, membrane, region, or plate, is "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part is "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" in the direction opposite to gravity. Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components. Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side. FIG. 1 briefl