CN-122003065-A - Display module

Abstract

The present application relates to a display module. The display module includes a display panel and a light control layer disposed on the display panel. The light control layer includes a first refractive layer disposed on the display panel and a second refractive layer disposed on the first refractive layer. The first refractive layer has a refractive index in a range of about 1.2 to about 1.5 with respect to visible light, the second refractive layer includes a metamaterial, and the second refractive layer has a refractive index in a range of about-2.0 to about-0.1 with respect to visible light.

Inventors

• PU LONGJUN
• LI YONGXI

Assignees

• 三星显示有限公司

Dates

Publication Date

20260508

Application Date

20251030

Priority Date

20241104

Claims (10)

1. 1. A display module, comprising: Display panel, and A light control layer on the display panel, the light control layer comprising: A first refraction layer disposed on the display panel, and A second refractive layer on the first refractive layer, wherein, The first refractive layer has a refractive index in the range of 1.2 to 1.5 with respect to visible light, The second refraction layer comprises metamaterial and The second refractive layer has a refractive index in a range of-2.0 to-0.1 with respect to the visible light.
2. 2. The display module of claim 1, wherein, The optical control layer further includes a third refractive layer on the second refractive layer, and The third refractive layer has a refractive index in a range of 1.2 to 1.5 with respect to the visible light.
3. 3. The display module of claim 2, wherein each of the first and third refractive layers comprises at least one of SiO 2 and MgF 2 .
4. 4. The display module of claim 2, wherein each of the first and third refractive layers has a thickness in a range of 10nm to 500 nm.
5. 5. A display module according to claim 2, wherein the light control layer further comprises a plurality of refractive lenses on the third refractive layer.
6. 6. The display module of claim 5, wherein, Each of the plurality of refractive lenses includes the metamaterial, and Each of the plurality of refractive lenses has a refractive index in a range of-2.0 to-0.1 with respect to the visible light.
7. 7. The display module of claim 2, wherein, The optical control layer further comprises a fourth refractive layer on the third refractive layer, The fourth refractive layer comprises the metamaterial, and The fourth refractive layer has a refractive index in a range of-2.0 to-0.1 with respect to the visible light.
8. 8. The display module of claim 2, wherein, The second refractive layer includes a plurality of lower refractive patterns, The plurality of lower refraction patterns are spaced apart from each other, Defining a separation space between the plurality of lower refraction patterns, an The third refraction layer comprises a plurality of upper refraction patterns, and the plurality of upper refraction patterns are respectively arranged on the plurality of lower refraction patterns.
9. 9. The display module of claim 8, wherein each of the plurality of lower refraction patterns has a quadrilateral shape in plan view.
10. 10. The display module of claim 9, wherein each of the plurality of lower refractive patterns has an edge in a range of 10nm to 500nm in a plan view.

Description

Display module Cross Reference to Related Applications The present application claims priority and rights of korean patent application No. 10-2024-0153997 filed at the korean intellectual property agency on month 11 and 4 of 2024, the disclosure of which is incorporated herein by reference in its entirety. Technical Field The present disclosure relates to a display module, an electronic device, and a method of manufacturing a display module including a light control layer that controls light having an emission angle greater than or equal to a selected angle. Background With the development of information society, the demand for display devices for presenting images has grown in various forms. As an example, the display device is being applied to various electronic devices such as a smart phone, a digital camera, a notebook computer, a navigation unit, and a smart television. For example, the display device may be applied to a Central Information Display (CID) located on a dashboard, center fascia, or control panel of an automobile. Recently, research has been conducted on limiting the viewing angle of a display device to prevent driver distraction and protecting personal information of a user of a personal electronic device. Disclosure of Invention The present disclosure provides a display module including a light control layer with improved front brightness and security. The present disclosure provides an electronic device including a light management layer with improved front-side brightness and security. The present disclosure provides a method of manufacturing a display module including a light control layer with improved front brightness and security. According to aspects of the present disclosure, a display module may include a display panel and a light control layer disposed on the display panel. The light management layer may include a first refractive layer disposed on the display panel and a second refractive layer disposed on the first refractive layer. The first refractive layer may have a refractive index ranging from about 1.2 to about 1.5 with respect to visible light, the second refractive layer may include a metamaterial, and the second refractive layer may have a refractive index ranging from about-2.0 to about-1.0 with respect to visible light. The light management layer may further include a third refractive layer disposed on the second refractive layer, and the third refractive layer may have a refractive index in a range of about 1.2 to about 1.5 with respect to visible light. Each of the first and third refractive layers may include at least one of SiO 2 and MgF 2. Each of the first refractive layer and the third refractive layer may have a thickness in a range of about 10nm to about 500 nm. The optical control layer may further include a plurality of refractive lenses disposed on the third refractive layer. Each of the refractive lenses may include a metamaterial, and each of the refractive lenses may have a refractive index in a range of about-2.0 to about-0.1 with respect to visible light. The light management layer may further include a fourth refractive layer disposed on the third refractive layer, the fourth refractive layer may include a metamaterial, and the fourth refractive layer may have a refractive index greater than or equal to about-2.0 and less than or equal to about-0.1 with respect to visible light. The second refractive layer may include a plurality of lower refractive patterns, the lower refractive patterns may be spaced apart from each other, a separation space may be defined between the lower refractive patterns, and the third refractive layer may include a plurality of upper refractive patterns, respectively disposed on the lower refractive patterns. Each of the lower refractive patterns may have a quadrangular shape in a plan view. Each of the lower refraction patterns has an edge of greater than or equal to about 10nm and less than or equal to about 500nm in plan view. The lower refractive patterns may be spaced apart from each other in a distance in a range of about 50nm to about 500nm in a plan view. The second refractive layer may include at least one of a metal, a metal oxide, and a metal halide. The second refractive layer may include at least one of Au, tiO 2、SiO2, mgF, and Ta 2O5. The second refractive layer may have an extinction coefficient of zero (0) with respect to visible light. The second refractive layer may have a thickness of greater than or equal to about 10nm and less than or equal to about 300 nm. According to another aspect of the present disclosure, an electronic device may include a housing, a display module accommodated in the housing, and a window disposed on the display module. The display module may include a display panel and a light control layer disposed on the display panel. The light management layer may include a first refractive layer disposed on the display panel and a second refractive layer disposed on the first refractive