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CN-117075368-B - Display apparatus

CN117075368BCN 117075368 BCN117075368 BCN 117075368BCN-117075368-B

Abstract

The present application relates to a display device comprising a backlight assembly, a first light source, a waveguide assembly, at least one first grating, at least one second grating and a second light source. The first light source is positioned on the backlight assembly. The waveguide assembly is positioned on the first light source. The first grating is located within the waveguide assembly. The second grating is located within the waveguide assembly. The second light source is positioned on one side of the waveguide assembly, wherein the second light source is overlapped with the waveguide assembly in the horizontal direction, and the first grating and the second grating are configured to control the second light source to emit light. The display device is provided with the first light source and the second light source, and the first grating and the second grating are arranged in the waveguide assembly to control the second light source to emit light, so that only the first light source can be started in the peep-proof mode. Allowing a viewing angle of only about 45 degrees. In the sharing mode, the first light source and the second light source can be turned on simultaneously, so that the light emitted by the two light sources is complementary, and the visual angle reaches about 70 degrees.

Inventors

  • CHEN XINWEN

Assignees

  • 业成科技（成都）有限公司
  • 业成光电（深圳）有限公司
  • 业成光电(无锡)有限公司
  • 英特盛科技股份有限公司

Dates

Publication Date
20260505
Application Date
20230816

Claims (9)

  1. 1. A display device, characterized by comprising: A backlight assembly; a first light source disposed on the backlight assembly, the backlight assembly configured to reflect light emitted from the first light source such that the light is emitted upward; a waveguide assembly located above the first light source; At least one first grating located within the waveguide assembly; At least one second grating positioned within the waveguide assembly, wherein the first light source is positioned horizontally between adjacent ones of the first and second gratings, and And the second light source is positioned on one side of the waveguide assembly, wherein the second light source is overlapped with the waveguide assembly in the horizontal direction, and the first grating and the second grating are configured to control the second light source to emit light.
  2. 2. The display device of claim 1, wherein a slit width of the first grating is smaller than a slit width of the second grating.
  3. 3. The display device of claim 1, wherein the first grating and the second grating are disposed on a bottom surface of the waveguide assembly.
  4. 4. The display device of claim 1, wherein the number of first gratings and the number of second gratings is a plurality, and the plurality of first gratings and the plurality of second gratings are alternately disposed within the waveguide assembly.
  5. 5. The display device of claim 1, wherein the display device further comprises: A first diffuser located on the waveguide assembly; A prism on the first diffusion sheet, and And the second diffusion sheet is positioned on the prism.
  6. 6. The display device of claim 1, wherein the display device further comprises: and the third light source is positioned on one side of the waveguide assembly, which is opposite to the second light source, and the third light source is overlapped with the waveguide assembly in the horizontal direction.
  7. 7. The display device of claim 5, wherein the prism is located between the first diffuser and the second diffuser.
  8. 8. The display device of claim 5, wherein the prism, the first diffusion sheet, and the second diffusion sheet completely cover the first light source in a vertical direction.
  9. 9. The display device according to claim 5, wherein the second light source is not overlapped with the prism, the first diffusion sheet, and the second diffusion sheet in a vertical direction.

Description

Display apparatus Technical Field The application relates to the field of display, in particular to display equipment. Background Most of today's displays can be displayed at a wide viewing angle, i.e. information on the display screen can be shared within a range. Accordingly, in order to meet the needs of users, the privacy display has become a mainstream product. The peep-proof display is a display with a narrow viewing angle, and information on a screen cannot be seen as long as the viewing angle exceeds a certain value. However, the mainstream peep-proof display is to attach a light control film (Light Control Film, LCF) to a common wide viewing angle display to control the light emitting angle of the display. Therefore, the mainstream peep-proof display can not be switched to the sharing mode according to the requirement. Disclosure of Invention In one aspect of the present application, a display apparatus is provided. According to some embodiments of the present application, a display device includes a backlight assembly, a first light source, a waveguide assembly, at least one first grating, at least one second grating, and a second light source. The first light source is positioned on the backlight assembly. The waveguide assembly is positioned on the first light source. The first grating is located within the waveguide assembly. The second grating is located within the waveguide assembly. The second light source is positioned on one side of the waveguide assembly, wherein the second light source is overlapped with the waveguide assembly in the horizontal direction, and the first grating and the second grating are configured to control the second light source to emit light. In one embodiment of the present application, the slit width of the first grating is smaller than the slit width of the second grating. In one embodiment of the present application, the first grating and the second grating are disposed on the bottom surface of the waveguide assembly. In an embodiment of the present application, the number of the first gratings and the second gratings is plural, and the first gratings and the second gratings are alternately arranged in the waveguide assembly. In an embodiment of the present application, at least two of the first grating, the second grating and the first light source do not overlap in a vertical direction. In an embodiment of the present application, the display apparatus further includes a first diffusion sheet, a prism, and a second diffusion sheet. The first diffuser is positioned on the waveguide assembly. The prism is positioned on the first diffusion sheet. The second diffusion sheet is positioned on the prism. In an embodiment of the application, the display device further comprises a third light source. The third light source is positioned on one side of the waveguide assembly opposite to the second light source, wherein the third light source is overlapped with the waveguide assembly in the horizontal direction. In one embodiment of the present application, the prism is located between the first diffusion sheet and the second diffusion sheet. In one embodiment of the present application, the prism, the first diffusion sheet and the second diffusion sheet completely cover the first light source in a vertical direction. In one embodiment of the present application, the second light source is not overlapped with the prism, the first diffusion sheet and the second diffusion sheet in the vertical direction. In the above embodiment of the present application, since the display device has the first light source and the second light source, and the first grating and the second grating are disposed in the waveguide assembly to control the second light source to emit light, only the first light source may be turned on in the peep-proof mode. Allowing a viewing angle of only about 45 degrees. In the sharing mode, the first light source and the second light source can be turned on simultaneously, so that the light emitted by the two light sources is complementary, and the visual angle reaches about 70 degrees. Drawings The present disclosure is best understood from the following detailed description when read with the accompanying drawing figures. Note that the various features are not drawn to scale in accordance with standard practices in the industry. Indeed, the dimensions of the various features may be arbitrarily increased or reduced for clarity of discussion. Fig. 1 is a schematic diagram of a display device according to an embodiment of the application. Fig. 2 is a partial enlarged view of the first grating and the second grating of fig. 1. Fig. 3 is a schematic view of light emitted from the first light source and the second light source in fig. 1. Fig. 4 is a schematic view of a display device according to another embodiment of the present application. Reference numerals illustrate: 100. 100a display device 110 First light source 120 Backlight assembly 130 Waveguide assembl