US-12617277-B2 - Display device

US12617277B2US 12617277 B2US12617277 B2US 12617277B2US-12617277-B2

Abstract

A display device includes a light emitting element disposed in a region adjacent to a transflective object in a vehicle and a light controlling means disposed on a route that a first light and a second light emitted from the light emitting element propagate. The first light is controlled to propagate out of the display device at a first angle ranged from 30 to 45 degrees and toward the transflective object and the second light is controlled to propagate out of the display device at a second angle ranged from 0 to 5 degrees. The first angle and the second angle are between a normal direction of the display device and the first light and the second light controlled through the light controlling means respectively. A first ratio of a light intensity of the first light to that of the second light is less than or equal to 14%.

Inventors

Jui-Jen Yueh
Tsung-Han Tsai
Kuan-Feng LEE

Assignees

Innolux Corporation

Dates

Publication Date: 20260505
Application Date: 20240625
Priority Date: 20210425

Claims (10)

1 . A display device having a first region adjacent to a transflective object in a vehicle, comprising: a first light emitting element disposed in the first region; and a light controlling means disposed on a route that a first light and a second light emitted from the first light emitting element propagate, through which the first light is controlled to propagate out of the display device at a first angle ranged from 30 degrees to 45 degrees and toward the transflective object and the second light is controlled to propagate out of the display device at a second angle ranged from 0 degrees to 5 degrees, wherein the first angle is between a normal direction of the display device and the first light controlled through the light controlling means, and the second angle is between the normal direction of the display device and the second light controlled through the light controlling means, wherein a first ratio of a light intensity of the first light to that of the second light is less than or equal to 14%.
2 . The display device of claim 1 , further having a second region adjacent to another transflective object disposed opposite to the transflective object in the vehicle, the display device further comprising: a second light emitting element disposed in the second region.
3 . The display device of claim 2 , wherein the first light emitting element and the second light emitting element are disposed on a substrate.
4 . The display device of claim 2 , wherein the light controlling means is disposed on a route that a third light emitted from the second light emitting element propagates.
5 . The display device of claim 4 , wherein the third light is controlled through the light controlling means to propagate out of the display device at a third angle ranged from 55 degrees to 70 degrees toward the another transflective object, wherein the third angle is between the normal direction of the display device and the third light controlled through the light controlling means.
6 . The display device of claim 1 , wherein the first ratio is less than or equal to 11%.
7 . The display device of claim 1 , wherein the light controlling means comprises a plurality of collimating walls.
8 . The display device of claim 7 , wherein the light controlling means further comprises a first electrode and a second electrode, and the plurality of collimating walls are disposed between the first electrode and the second electrode.
9 . The display device of claim 8 , wherein an electricity is capable of being applied to the light controlling means through the first electrode and the second electrode to control the first angle and the second angle.
10 . The display device of claim 9 , wherein the plurality of collimating walls comprises a switchable light-absorbing material.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation application of U.S. application Ser. No. 17/704,015, filed on Mar. 25, 2022. The content of the application is incorporated herein by reference. BACKGROUND OF THE DISCLOSURE 1. Field of the Disclosure The present disclosure is related to a display device, and more particularly, to a display device with a light controlling means. 2. Description of the Prior Art With the evolution of the automotive technology, a role of vehicle display devices in driving vehicles has become increasingly important. However, light emitted by the vehicle display device may cause reflections after being reflected by a windshield or car windows, thereby affecting the driver's line of sight, making it impossible for a driver to see road conditions or side mirrors. Therefore, how to improve the reflection to ensure driving safety has become an important problem to be solved. SUMMARY OF THE DISCLOSURE According to one embodiment of the invention, a display device having a first region adjacent to a transflective object in a vehicle is provided. The display device includes a first light emitting element disposed in the first region and a light controlling means disposed on a route that a first light and a second light emitted from the first light emitting element propagate, through which the first light is controlled to propagate out of the display device at a first angle ranged from 30 degrees to 45 degrees and toward the transflective object and the second light is controlled to propagate out of the display device at a second angle ranged from 0 degrees to 5 degrees. Wherein, the first angle is between a normal direction of the display device and the first light controlled through the light controlling means, and the second angle is between the normal direction of the display device and the second light controlled through the light controlling means. A first ratio of a light intensity of the first light to that of the second light is less than or equal to 14%. These and other objectives of the present disclosure will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the embodiment that is illustrated in the various figures and drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an interior of a vehicle according to an example of the present invention. FIG. 2 is a top-view schematic diagram of a vehicle according to an example of the present invention. FIG. 3(a) and FIG. 3(b) are schematic diagrams of a relationship between an angle and a light intensity according to examples of the present invention. FIG. 4 is a top-view schematic diagram of a display device according to an example of the present invention. FIG. 5 is a cross-sectional schematic diagram of a display device according to an example of the present invention. FIG. 6(a) and FIG. 6(b) are cross-sectional schematic diagrams of a display device according to an example of the present invention. FIG. 7 is a top-view schematic diagram of a display device according to an example of the present invention. FIG. 8 is a cross-sectional schematic diagram of a display device according to an example of the present invention. FIG. 9(a)-FIG. 9(d) are schematic diagrams of a manufacturing process of a light controlling means according to an example of the present invention. FIG. 10 is a flowchart of a manufacturing process of a light controlling means according to an example of the present invention. DETAILED DESCRIPTION The present disclosure may be understood by reference to the following detailed description, taken in conjunction with the drawings as described below. It is noted that, for purposes of illustrative clarity and being easily understood by the readers, various drawings of this disclosure show a portion of the electronic device, and certain elements in various drawings may not be drawn to scale. In addition, the number and dimension of each element shown in drawings are only illustrative and are not intended to limit the scope of the present disclosure. Certain terms are used throughout the description and following claims to refer to particular elements. As those skilled in the art will understand, electronic equipment manufacturers may refer to an element by different names. This document does not intend to distinguish between elements that differ in name but not function. In the following description and in the claims, the terms “include”, “comprise” and “have” are used in an open-ended fashion, and thus should be interpreted to mean “include, but not limited to . . . ”. The directional terms mentioned in the following description, e.g., “on”, “below”, “front”, “rear”, “left”, “right”, etc., are only directions with reference to the drawings. Accordingly, the directional terms are used to illustrate, but not to limit this disclosure. In the drawings, each drawing depicts the general features of the methods, str