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CN-115812168-B - Optical film, panel unit, and display device

CN115812168BCN 115812168 BCN115812168 BCN 115812168BCN-115812168-B

Abstract

The invention provides a method for achieving both an effect of suppressing degradation of image quality due to a joint between panel units and sufficient brightness in a display device having a display surface formed of a plurality of panel units. The present invention relates to a film comprising a light-transmitting layer containing particles and a colorant and having a total light transmittance of 10% to 30%, which is used for a display device having a display surface composed of a plurality of panel units.

Inventors

  • Koda Kosei
  • UMEDA HIROAKI

Assignees

  • 柯尼卡美能达株式会社

Dates

Publication Date
20260505
Application Date
20210607
Priority Date
20200707

Claims (11)

  1. 1. An optical film comprising a light-transmitting layer containing particles and a colorant and having a total light transmittance of 10% -30%, For a display device having a display surface constituted by a plurality of panel units, The light-transmitting layer is a light-transmitting layer A, the optical film further comprises a substrate layer, The substrate layer is a light-transmitting layer B, The light-transmitting layer B is disposed on the light-transmitting layer A, When the haze of the laminate of one light-transmissive layer A and one light-transmissive layer B is measured, the relationship between the value Hz (A-B) (%) when light is incident from the light-transmissive layer A side and the value Hz (B-A) (%) when light is incident from the light-transmissive layer B side is satisfied with Hz (A-B) < Hz (B-A).
  2. 2. The optical film according to claim 1, wherein the light-transmitting layer is a resin film.
  3. 3. The optical film according to claim 1 or 2, wherein the total light transmittance of the light transmissive layer is 15% -25%.
  4. 4. An optical film according to any one of claims 1 to 3, wherein the particles are inorganic oxide particles.
  5. 5. The optical film of any of claims 1-4, wherein the colorant is a pigment.
  6. 6. The optical film according to claim 1 to 5, wherein the base material layer is a resin film.
  7. 7. A panel unit comprising a light emitting module and the optical film according to any one of claims 1 to 5, wherein the optical film is disposed on the display surface side of the light emitting module, A display device having a display surface constituted by a plurality of panel units.
  8. 8. A panel unit comprising a light emitting module and the optical film according to any one of claims 1 to 6, wherein the optical film is disposed on the display surface side of the light emitting module, The base material layer is disposed on the display surface side of the light-transmitting layer A, A display device having a display surface constituted by a plurality of panel units.
  9. 9. A panel unit according to claim 7 or 8, wherein the light emitting module comprises LED elements.
  10. 10. The panel unit according to claim 9, wherein the LED element has an LED light emitting chip and a resin cover covering the LED light emitting chip, The width W and depth D of the LED element are 300 μm or less, the height H of the LED element is 200 μm or less, The arrangement interval of the LED elements is 0.03 mm-100 mm.
  11. 11. A display device having a display surface constituted by a plurality of the panel units according to any one of claims 7 to 10.

Description

Optical film, panel unit, and display device Technical Field The present invention relates to an optical film for a display device having a display surface constituted by a plurality of panel units, a panel unit for the display device, and the display device. Background As next-generation display devices replacing various liquid crystal display devices, self-luminous display devices typified by Micro LED display devices described in japanese patent application laid-open No. 2018-14481 (corresponding to the specification of us patent application publication No. 2018/0019233, the specification of us patent application publication No. 2018/0331085, or the specification of us patent No. 2018/0331086) have been developed. In such a self-luminous display, in order to avoid negative effects on the quality of a displayed image caused by light reflected on a substrate or the like on which a light emitting element as a light source is mounted, it has been studied to laminate a light shielding layer that absorbs visible light on the display surface side of a light emitting module including the light emitting element. Japanese patent application laid-open publication No. 2019-204905 discloses a self-luminous display comprising a light-emitting module in which a plurality of light-emitting elements are mounted on a wiring board, a black sealing material sheet having an olefin resin as a matrix resin and having a visible light transmittance of 5% to 70%, and a transparent optical layer (light-transmitting layer). In this self-luminous display, a black sealing material sheet is laminated on a light emitting module so as to cover the surfaces of a light emitting element and a wiring substrate, and a transparent optical layer is laminated on the black sealing material sheet. Further, this document discloses that such a black sealing material sheet exhibits excellent characteristics as a light shielding layer, and can simplify the layer structure of a self-luminous display compared to a conventional self-luminous display, as a result of which the productivity of the self-luminous display can be improved. Disclosure of Invention According to the black sealing material sheet of japanese patent application laid-open No. 2019-204905, when used in a display device having a display surface constituted by a plurality of panel units, degradation of image quality due to seams between the panel units can be suppressed. However, in the display device using the black sealing material sheet of japanese patent application laid-open No. 2019-204905, there is a problem that the luminance is greatly lowered. Accordingly, an object of the present invention is to provide a means capable of suppressing degradation of image quality due to a seam between panel units and providing sufficient brightness in a display device having a display surface formed of a plurality of panel units. The above-described problems of the present invention can be solved by the following means. An optical film comprising particles and a colorant, and a light-transmitting layer having a total light transmittance of 10% -30%, A display device having a display surface constituted by a plurality of panel units. Drawings Fig. 1 (a) - (C) are schematic diagrams each showing a cross-sectional structure of an optical film used in one embodiment of the present invention. 1 denotes a light-transmitting layer a described later, 2 denotes a laminated film, 3 denotes a light-transmitting layer B described later, 3' denotes a layer or film that is the base of the light-transmitting layer B, and 4 denotes a hard coat layer. Fig. 2 is a schematic diagram showing an example of an apparatus for producing an optical film according to an embodiment of the present invention. 100 denotes a laminate (laminated film), 110 denotes a support (for example, a base material layer such as a light transmissive layer B), 200 denotes a manufacturing apparatus, 201 denotes a roll body of the support (for example, a base material layer such as a light transmissive layer B), 210 denotes a supply unit, 220 denotes an application unit, 221 denotes a support roll, 222 denotes an application head, 223 denotes a decompression chamber, 230 denotes a drying unit, 231 denotes a drying chamber, 232 denotes an inlet for a drying gas, 233 denotes an outlet, 240 denotes a cooling unit, 241 denotes a cooling chamber, 242 denotes a cooling air inlet, 243 denotes a cooling air outlet, 250 denotes a winding unit, 251 denotes a roll body of the laminate (laminated film), and a, B, c, d denotes a conveying roll. Fig. 3 is a schematic diagram showing a cross-sectional structure of a panel unit according to an embodiment of the present invention. 1 denotes a light-transmitting layer a described later, 2 denotes a laminated film, 3 denotes a light-transmitting layer B described later, 3' denotes a layer or film as a base (foundation) of the light-transmitting layer B, 4 denotes a hard coat layer, 10 denotes a panel unit, 11