WO-2026091173-A1 - DISPLAY APPARATUS AND ELECTRONIC DEVICE

WO2026091173A1WO 2026091173 A1WO2026091173 A1WO 2026091173A1WO-2026091173-A1

Abstract

A display apparatus and an electronic device. A sensor (30) is located in a first display area (1011); an infrared-transmissive reflective film (22) is provided in the first display area (1011) and a second display area (1012); the transmittance of the infrared-transmissive reflective film (22) for infrared light is greater than the transmittance of the infrared-transmissive reflective film (22) for visible light, and the reflectivity of the infrared-transmissive reflective film (22) for infrared light is less than the reflectivity of the infrared-transmissive reflective film (22) for visible light.

Inventors

LIU, MULIN
SAN, Yingzhi
SONG, Suimang

Assignees

武汉华星光电技术有限公司

Dates

Publication Date: 20260507
Application Date: 20241108
Priority Date: 20241030

Claims (20)

A display device includes a display area, the display area including a first display area and a second display area adjacent to the first display area; The display device further includes: Display panel; A backlight module is disposed on one side of the display panel; The sensor is disposed on the side of the backlight module away from the display panel and located within the first display area; The backlight module includes a light guide plate disposed between the display panel and the sensor, and an infrared transmissive and reflective film disposed between the light guide plate and the sensor. The infrared transmissive and reflective film is disposed in the first display area and the second display area. The transmittance of the infrared transmissive and reflective film to infrared light is greater than the transmittance of the infrared transmissive and reflective film to visible light, and the reflectance of the infrared transmissive and reflective film to infrared light is less than the reflectance of the infrared transmissive and reflective film to visible light.
According to claim 1, the display device is wherein the light guide plate is disposed in the first display area and the second display area, and the orthographic projection of the sensor on the light guide plate is located within the coverage area of the light guide plate.
According to claim 1, the display device further includes a light adjustment layer disposed between the light guide plate and the display panel, the light adjustment layer being disposed in the first display area and the second display area; The light adjustment layer switches between a transparent state and a fog state. When the light adjustment layer is configured in the transparent state, light incident on the light adjustment layer from the light guide plate passes through the light adjustment layer. When the light adjustment layer is configured in the fog state, light incident on the light adjustment layer from the light guide plate is scattered in the light adjustment layer.
The display device according to claim 3, wherein when the sensor senses the infrared light, the light adjustment layer is configured in the transparent state, and when the sensor stops sensing the infrared light, the light adjustment layer is configured in the fog state.
According to claim 4, in the first driving period, the sensor senses the infrared light, and in the second driving period, the sensor stops sensing the infrared light, and the first driving period is less than 10 ms.
According to claim 5, when the display device performs driving display, the first driving period and the second driving period alternate.
The display device according to any one of claims 3 to 6, wherein the light adjustment layer comprises a first substrate and a second substrate disposed opposite to each other, an electrode layer disposed on the first substrate and/or the second substrate, and a liquid crystal layer located between the first substrate and the second substrate, the liquid crystal layer comprising polymer network liquid crystal or polymer dispersed liquid crystal.
The display device according to any one of claims 3 to 6, wherein the backlight module further includes an optical film disposed between the light adjustment layer and the display panel, the optical film being disposed in the first display area and the second display area.
According to claim 8, the display device further includes a back plate disposed on the side of the infrared transmissive reflective film away from the light guide plate, wherein the back plate has a through hole located in the first display area, and the orthogonal projection of the through hole on the infrared transmissive reflective film is located within the coverage area of the orthogonal projection of the optical film on the infrared transmissive reflective film.
According to claim 9, the display device wherein the orthographic projection of the sensor on the back plate is located within the through hole, and the distance between the orthographic projection of the sensor on the back plate and the edge of the through hole is greater than or equal to 0.3 mm.
According to claim 1, the infrared transmissive reflective film has a transmittance of 84% or more for infrared light and a reflectance of 99% or more for visible light.
An electronic device includes a display device, the display device including a display area, the display area including a first display area and a second display area adjacent to the first display area; The display device further includes: Display panel; A backlight module is disposed on one side of the display panel; The sensor is disposed on the side of the backlight module away from the display panel and located within the first display area; The backlight module includes a light guide plate disposed between the display panel and the sensor, and an infrared transmissive and reflective film disposed between the light guide plate and the sensor. The infrared transmissive and reflective film is disposed in the first display area and the second display area. The transmittance of the infrared transmissive and reflective film to infrared light is greater than the transmittance of the infrared transmissive and reflective film to visible light, and the reflectance of the infrared transmissive and reflective film to infrared light is less than the reflectance of the infrared transmissive and reflective film to visible light.
According to the electronic device of claim 12, the light guide plate is disposed in the first display area and the second display area, and the orthographic projection of the sensor on the light guide plate is located within the coverage area of the light guide plate.
According to the electronic device of claim 12, the backlight module further includes a light adjustment layer disposed between the light guide plate and the display panel, the light adjustment layer being disposed in the first display area and the second display area; The light adjustment layer switches between a transparent state and a fog state. When the light adjustment layer is configured in the transparent state, light incident on the light adjustment layer from the light guide plate passes through the light adjustment layer. When the light adjustment layer is configured in the fog state, light incident on the light adjustment layer from the light guide plate is scattered in the light adjustment layer.
The electronic device according to claim 14, wherein when the sensor senses the infrared light, the light adjustment layer is configured in the transparent state, and when the sensor stops sensing the infrared light, the light adjustment layer is configured in the fog state.
According to the electronic device of claim 15, the display device senses the infrared light during a first driving period, the display device stops sensing the infrared light during a second driving period, and the first driving period is less than 10 ms.
According to the electronic device of claim 16, when the display device performs driving display, the first driving period and the second driving period alternate.
The electronic device according to any one of claims 14 to 17, wherein the light adjustment layer comprises a first substrate and a second substrate disposed opposite to each other, an electrode layer disposed on the first substrate and/or the second substrate, and a liquid crystal layer located between the first substrate and the second substrate, the liquid crystal layer comprising a polymer network liquid crystal or a polymer dispersed liquid crystal.
The electronic device according to any one of claims 14 to 17, wherein the backlight module further includes an optical film disposed between the light adjustment layer and the display panel, the optical film being disposed in the first display area and the second display area.
According to the electronic device of claim 19, the backlight module further includes a back plate disposed on the side of the infrared transmissive reflective film away from the light guide plate, wherein the back plate has a through hole located in the first display area, and the orthographic projection of the through hole on the infrared transmissive reflective film is located within the coverage area of the orthographic projection of the optical film on the infrared transmissive reflective film.

Description

Display devices and electronic equipment Technical Field This application relates to the field of display technology, and more particularly to a display device and electronic device. Background Technology Under-display camera technology refers to placing a front-facing camera under the screen without compromising the screen's integrity. The screen display area is divided into two parts: a regular display area and a camera area. For example, under-display infrared cameras used in automotive displays can monitor drivers for seatbelt use, fatigue, and distraction. This requires ensuring both high-quality infrared imaging (sufficient infrared transmittance in the camera area) and seamless integration between the camera area and the regular display area. However, in liquid crystal display devices, the presence of various optical films in the backlight module can significantly affect the infrared transmittance of the camera area, thereby impacting the imaging performance of the infrared camera. Invention Overview This application provides a display device and electronic device that can improve the transmittance of the backlight module to infrared light, thereby improving the sensing effect of the sensor to infrared light. This application provides a display device, which includes a display area, comprising a first display area and a second display area adjacent to the first display area; The display device further includes: Display panel; A backlight module is disposed on one side of the display panel; The sensor is disposed on the side of the backlight module away from the display panel and located within the first display area; The backlight module includes a light guide plate disposed between the display panel and the sensor, and an infrared transmissive and reflective film disposed between the light guide plate and the sensor. The infrared transmissive and reflective film is disposed in the first display area and the second display area. The transmittance of the infrared transmissive and reflective film to infrared light is greater than the transmittance of the infrared transmissive and reflective film to visible light, and the reflectance of the infrared transmissive and reflective film to infrared light is less than the reflectance of the infrared transmissive and reflective film to visible light. This application embodiment also provides an electronic device, the electronic device including a display device, the display device including a display area, the display area including a first display area and a second display area adjacent to the first display area; The display device further includes: Display panel; A backlight module is disposed on one side of the display panel; The sensor is disposed on the side of the backlight module away from the display panel and located within the first display area; The backlight module includes a light guide plate disposed between the display panel and the sensor, and an infrared transmissive and reflective film disposed between the light guide plate and the sensor. The infrared transmissive and reflective film is disposed in the first display area and the second display area. The transmittance of the infrared transmissive and reflective film to infrared light is greater than the transmittance of the infrared transmissive and reflective film to visible light, and the reflectance of the infrared transmissive and reflective film to infrared light is less than the reflectance of the infrared transmissive and reflective film to visible light. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts. Figure 1 is a schematic diagram of the structure of a display device provided in one embodiment; Figure 2 is a schematic diagram of a display device provided in an embodiment of this application; Figure 3 is a schematic diagram of another structure of the display device provided in an embodiment of this application; Figure 4 is a spectral transmittance curve of the infrared penetrating and reflecting film provided in the embodiment of this application; Figure 5 is a schematic diagram of the driving time period of the sensor and the light adjustment layer provided in the embodiment of this application; Figure 6 is a schematic diagram of a light adjustment layer provided in an embodiment of this application; Figure 7 is a schematic diagram of the display device in Co