KR-102961527-B1 - Optical path control device and Display device including the same

Abstract

The embodiments relate to a light path control device and a display device including the same, comprising: a substrate; a viewing angle control member including light-blocking patterns patterned at regular intervals on the substrate; and a lens assembly formed on the viewing angle control member and composed of a plurality of lenses, wherein the light-blocking patterns are composed of electrochromic elements to implement a light-blocking mode or a light-transmitting mode.

Inventors

• 이세민
• 한재정
• 김대용
• 권승주

Assignees

• 엘지디스플레이 주식회사

Dates

Publication Date

20260507

Application Date

20221019

Claims (20)

1. A substrate comprising a central region and an edge region adjacent to the central region; A viewing angle control member comprising light-blocking patterns patterned at regular intervals on the substrate and disposed corresponding to the central region; and A lens assembly formed on the above-mentioned field of view control member and composed of a plurality of lenses, comprising: The above light-blocking patterns are composed of electrochromic elements to implement a light-blocking mode or a light-transmitting mode, and The above electrochromic element is, Each includes electrode patterns that extend from the central region to the edge region and are connected to each other in the edge region, The above electrode patterns are, An optical path control device electrically connected to an external voltage source in the above edge region.
2. In paragraph 1, the viewing angle control member is, A light path control device comprising a pattern cover layer that covers the light-blocking pattern.
3. In paragraph 1, the lens assembly is, An optical path control device comprising a lens cover layer having a lower refractive index than the plurality of lenses and covering the plurality of lenses.
4. In paragraph 1, each of the above electrochromic elements is, First electrode; A second electrode disposed on the first electrode; and It includes a color-changing layer interposed between the first electrode and the second electrode and composed of an electrochromic material, and An optical path control device comprising at least one of the first electrode and the second electrode including the electrode patterns.
5. In paragraph 4, the first electrode is, It is composed of electrode patterns that are spaced apart from each other and extend in one direction on the substrate, and The above discoloration layer and the above second electrode are, An optical path control device having the same shape as the first electrode and arranged in overlap with the first electrode.
6. In paragraph 4, the first electrode is, Formed in the form of a surface electrode on the above substrate, and The above discoloration layer is, It is composed of patterns that are spaced apart from each other and extend in one direction on the above substrate, and The second electrode above is, An optical path control device comprising electrode patterns that are spaced apart from each other and extend in one direction on the substrate.
7. In paragraph 4, the first electrode, the discoloration layer, and the second electrode are, Widely formed from the central area to the edge area, The first electrode and the second electrode are, An optical path control device configured to receive voltage in the above-mentioned edge region.
8. In paragraph 4, the first electrode is, Widely formed from the central area to the edge area, The above discoloration layer and the above second electrode are, A light path control device formed only in the central region on at least one side, wherein the first electrode is exposed upward in the edge region of the at least one side.
9. delete
10. In paragraph 1, An optical path control device in which each of the above plurality of lenses is a semi-cylindrical or spherical lens.
11. A light path control device according to claim 1, wherein each of the plurality of lenses is aligned with the intervals between the light-blocking patterns.
12. A display panel comprising a display area where pixels are arranged and a non-display area around the display area; and A light path control device controlled to operate in a light-transmitting mode or a light-blocking mode in correspondence with the share mode or private mode of the above-mentioned display panel, wherein The above optical path control device is, A substrate comprising a central region corresponding to the above-mentioned display area and an edge region corresponding to the above-mentioned non-display area; A viewing angle control member comprising light-blocking patterns patterned at regular intervals on the substrate and disposed corresponding to the central region; and A lens assembly formed on the above-mentioned field of view control member and composed of a plurality of lenses, comprising: The above light-blocking patterns are composed of electrochromic elements, and The above electrochromic element is, Each includes electrode patterns that extend from the central region to the edge region and are connected to each other in the edge region, The above electrode patterns are, A display device electrically connected to an external voltage source in the above edge region.
13. In Paragraph 12, It further includes a backlight unit positioned at the bottom of the above-mentioned optical path control device and emitting light, and The above display panel is a display device, which is a Liquid Crystal Display (LCD) positioned on the upper part of the light path control device.
14. In Paragraph 13, A display device in which an air gap is formed between the optical path control device and the display panel.
15. In Paragraph 13, A display device comprising a lens cover layer having a lower refractive index than the plurality of lenses and covering the plurality of lenses.
16. In paragraph 15, A display device in which the above-mentioned optical path control device and the above-mentioned display panel are in direct contact.
17. In Paragraph 12, It further includes a backlight unit positioned at the bottom of the above-mentioned optical path control device and emitting light, and The above display panel is a display device that is an LCD interposed between the light path control device and the backlight unit.
18. In Clause 12, the above-mentioned display panel is, A display device, which is an OLED (Organic Light Emitting Diodes) display panel positioned at the bottom of the above-mentioned light path control device.
19. In paragraph 1, The electrode patterns are connected to each other in an edge region adjacent to at least one first side among the plurality of sides of the substrate, and An optical path control device, wherein the first distance between the central region and the at least one first side is greater than the second distance between the central region and at least one second side that is different from the at least one first side among the plurality of sides.
20. In Paragraph 19, An optical path control device in which the above edge region is formed only between the above central region and the above at least one first side.

Description

Optical path control device and display device including the same The present invention relates to an optical path control device and a display device including the same. A light-blocking film can function as a light path control device by controlling the path of light according to the angle of incidence of external light, blocking light in a specific direction while transmitting light in another specific direction. Such a light-blocking film is attached to display devices such as mobile phones, laptops, tablet PCs, and in-car navigation systems to adjust the viewing angle when an image is displayed, or to enable clear image quality within a specific viewing angle. Such light-blocking films are problematic because they can reduce the brightness of the device to which they are attached. FIG. 1 is a cross-sectional view of an optical path control device according to one embodiment. FIG. 2 is a cross-sectional view to illustrate the figures for the components of the optical path control device shown in FIG. 1. Figure 3 is a cross-sectional view illustrating the structure of the light-blocking pattern in more detail. Figure 4 is a simulation result of measuring the luminance distribution in the share mode and private mode of the optical path control device shown in Figure 1. FIG. 5 is a cross-sectional view of a display device including an optical path control device according to a first embodiment. FIG. 6 is a cross-sectional view of a display device including an optical path control device according to a second embodiment. FIG. 7 is a cross-sectional view of a display device including an optical path control device according to a third embodiment. FIG. 8 is a cross-sectional view of a display device including an optical path control device according to a fourth embodiment. FIG. 9 is a cross-sectional view of a display device including an optical path control device according to a fifth embodiment. FIG. 10 is a plan view of a viewing angle control member according to a first embodiment. Figure 11 is a cross-sectional view along the line AA' of Figure 10. FIG. 12 is a plan view of a viewing angle control member according to a second embodiment. Figure 13 is a cross-sectional view along the BB' line of Figure 12. FIG. 14 is a plan view of a viewing angle control member according to a third embodiment. Figure 15 is a cross-sectional view along the CC' line of Figure 14. FIG. 16 is a cross-sectional view along the DD' line of FIG. 14. FIG. 17 is a plan view of a viewing angle control member according to the fourth embodiment. FIG. 18 is a cross-sectional view along the EE' line of FIG. 17. FIG. 19 is a plan view of a viewing angle control member according to the fifth embodiment. FIG. 20 is a cross-sectional view along the FF' line of FIG. 19. Hereinafter, embodiments are 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" to 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 the components are exaggerated for the effective illustration of the technical content. "And/or" includes all of 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 are not 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 embodiments, 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. Terms such as "below," "lower side," "above," and "upper side" 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. FIG. 1 is a cross-sectional view of an optical path control device according to one embodiment. Referring to FIG. 1, the optical path control device (10) includes a substrate (110), a viewing angle control member (120), and a lens assembly (130). The substrate (110) may be a transparent substrate as a base substrate of the optical path control device (10). The substrate (110) may be a rigid substrate including g