US-20260126680-A1 - LIGHT-EMITTING DEVICE

Abstract

A light-emitting device is provided. The light-emitting device includes a display panel including a substrate and a plurality of scan lines disposed on the substrate and extending in a first direction, a backlight module disposed under the display panel, and an optical film disposed above the backlight module and including a plurality of light-blocking portions and a plurality of light-transmission portions which are arranged alternately. The light blocking portions extend in a second direction, and the first direction and the second direction are not parallel.

Inventors

• Hong-Sheng HSIEH
• Hao-Yu Chen

Assignees

• Innolux Corporation

Dates

Publication Date

20260507

Application Date

20251219

Priority Date

20210203

Claims (8)

1. 1 . A light-emitting device, comprising: a light source configured to emit an incident light; and an optical layer disposed to receive the incident light, the optical layer comprising a plurality of light-blocking portions and a plurality of light-transmission portions arranged alternately, wherein the plurality of light-blocking portions extend along a first direction, wherein a horizontal viewing direction is defined as a second direction, and an included angle formed between the first direction and the second direction is greater than 0 degree and less than or equal to 20 degrees, wherein a light emitted by the light-emitting device has a light intensity distribution according to various azimuth angles, the light intensity distribution has a first position with a first light intensity and a second position with a second light intensity, the first position refers to a position where the azimuth angles between 135 degrees and 180 degrees, the second position refers to a position where the azimuth angles between 0 degree and 45 degrees, the first position and the second position are symmetrical relative to the azimuth angle of 90 degrees, and the first light intensity is different from the second light intensity.
2. 2 . The light-emitting device according to claim 1 , wherein the first position refers to a position where the azimuth angles between 155 degrees and 175 degrees, and the second position refers to a position where the azimuth angles between 5 degrees and 25 degrees.
3. 3 . The light-emitting device according to claim 1 , wherein the light source comprises a plurality of light-emitting diodes.
4. 4 . The light-emitting device according to claim 1 , further comprising a light guide plate, wherein the optical layer is disposed on the light guide plate.
5. 5 . The light-emitting device according to claim 4 , further comprising a diffuser layer disposed on the light guide plate.
6. 6 . The light-emitting device according to claim 1 , wherein the light intensity distribution has an asymmetrical light pattern between upper and lower viewing angles.
7. 7 . A display device, comprising the light-emitting device as claimed in claim 1 .
8. 8 . A vehicle, comprising the light-emitting device as claimed in claim 1 .

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application is a Continuation of application Ser. No. 18/519,653, filed on Nov. 27, 2023, which is a Continuation of application Ser. No. 17/568,936, filed on Jan. 5, 2022, which claims priority of China Patent Application No. 202110148297.6, filed on Feb. 3, 2021, the entirety of which are incorporated by reference herein. BACKGROUND Technical Field The present disclosure relates to a display device, and in particular to a display device configured with a rotatable optical film. Description of the Related Art At present, for an automotive display used in the front passenger seat, in order to prevent a passenger from interfering with the driver while watching audio-visual entertainment content, the display in front of the passenger must have a privacy function that can be turned on and off. One way to do this is to place additional privacy devices on the display. In addition, due to driving safety considerations, the demand for display quality or optical design of automotive displays continues to increase. SUMMARY In accordance with one embodiment of the present disclosure, a display device is provided. The display device includes a display panel including a substrate and a plurality of scan lines disposed on the substrate and extending in a first direction, a backlight module disposed under the display panel, and an optical film disposed above the backlight module and including a plurality of light-blocking portions and a plurality of light-transmission portions which are arranged alternately. The light-blocking portions extend in a second direction, and the first direction and the second direction are not parallel. In accordance with one embodiment of the present disclosure, a light-emitting device is provided and configured to emit a light. The light-emitting device includes a substrate; a plurality of scan lines disposed on the substrate and extending in a first direction; and a layer overlapped with the substrate and comprising a plurality of light-blocking portions and a plurality of light-transmission portions arranged alternately. The plurality of light blocking portions extend in a second direction, and the second direction is neither parallel to nor perpendicular to the first direction. The light emitted by the light-emitting device has a light intensity distribution. The light intensity distribution has a first position with a first light intensity and a second position with a second light intensity. The first position refers to a position in where an azimuth angle between 135 degrees and 180 degrees. The second position refers to a position in where the azimuth angle between 0 degree and 45 degrees. The first position and the second position are symmetrical relative to the azimuth angle of 90 degrees. The first light intensity is different from the second light intensity. In accordance with one embodiment of the present disclosure, a light-emitting device is provided. The light-emitting device includes a light source configured to emit an incident light; and an optical layer disposed to receive the incident light. The optical layer includes a plurality of light-blocking portions and a plurality of light-transmission portions arranged alternately. The plurality of light-blocking portions extend along a first direction. A horizontal viewing direction is defined as a second direction. An included angle formed between the first direction and the second direction is greater than 0 degree and less than or equal to 20 degrees. A light emitted by the light-emitting device has a light intensity distribution according to various azimuth angles. The light intensity distribution has a first position with a first light intensity and a second position with a second light intensity. The first position refers to a position where the azimuth angles between 135 degrees and 180 degrees. The second position refers to a position where the azimuth angles between 0 degree and 45 degrees. The first position and the second position are symmetrical relative to the azimuth angle of 90 degrees. The first light intensity is different from the second light intensity. A detailed description is given in the following embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The disclosure may be understood by reading the subsequent detailed description and examples with references made to the accompanying drawings, wherein: FIG. 1 illustrates a cross-sectional view of a display device in accordance with one embodiment of the present disclosure. FIG. 2 illustrates a cross-sectional view of a display device in accordance with one embodiment of the present disclosure. FIG. 3 illustrates a cross-sectional view of an optical film of a display device in accordance with one embodiment of the present disclosure. FIG. 4 illustrates a top view of a configuration relationship between a display panel and an optical film in accordance with one embodiment of the p