Display apparatus and electronic system

Abstract

A display apparatus includes a backlight module and a display panel disposed on the backlight module. The backlight module includes a reflective sheet, at least one light-emitting element and at least one optical film. The reflective sheet includes a first portion and a second portion outside the first portion. The first portion of the reflective sheet has an opening. The at least one optical film is located above the reflective sheet. A first direction is perpendicular to the at least one optical film. There is a first distance between the first portion of the reflective sheet and the at least one optical film in the first direction. There is a second distance between the second portion of the reflective sheet and the at least one optical film in the first direction. The first distance is smaller than the second distance. In addition, an electronic system including the display apparatus is also provided.

Description

[Technical Field]

[0001] This invention relates to a display device and an electronic system. [Previous Technology]

[0002] For current automotive under-display camera devices, in order to improve the optical transmittance of the camera, the optical film in the display module in front of the camera must be perforated. Since the viewing angle of the camera must be large enough to provide good recognition, the opening of the optical film must also have a certain width. However, the larger the opening of the optical film, the more difficult it is to compensate for the visual quality of the display module, and the more easily the opening of the optical film is noticed by the user. [Summary of the Invention]

[0003] The present invention provides a display device with excellent performance.

[0004] This invention provides an electronic system with excellent performance.

[0005] The display device of the present invention includes a backlight module and a display panel disposed on the backlight module. The backlight module includes a reflective sheet, at least one light-emitting element, and at least one optical film. The reflective sheet includes a first portion and a second portion other than the first portion. The first portion of the reflective sheet has an opening. The at least one optical film is located above the reflective sheet. A first direction is perpendicular to the at least one optical film. The first portion of the reflective sheet and the at least one optical film have a first distance in the first direction. The second portion of the reflective sheet and the at least one optical film have a second distance in the first direction. The first distance is less than the second distance.

[0006] The electronic system of the present invention includes a backlight module, a display panel, a camera element, and a processing element. The backlight module includes a reflective sheet, at least one light-emitting element, and at least one optical film. The reflective sheet includes a first portion and a second portion other than the first portion. The first portion of the reflective sheet has an opening. At least one light-emitting element is located on the reflective sheet. At least one optical film is located above the reflective sheet. A first direction is perpendicular to the at least one optical film. The first portion of the reflective sheet and the at least one optical film have a first distance in the first direction. The second portion of the reflective sheet and the at least one optical film have a second distance in the first direction. The first distance is less than the second distance. The display panel is disposed on the backlight module. The camera element is disposed corresponding to the opening of the first portion of the reflective sheet. The processing element is electrically connected to the camera element.

Implementation Method

[0007] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

[0008] It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected" to another element, it may be directly on or connected to the other element, or an intermediate element may also be present. Conversely, when an element is referred to as being "directly on" or "directly connected" to another element, no intermediate element is present. As used herein, "connection" may refer to a physical and / or electrical connection. Furthermore, "electrical connection" or "coupling" may mean the presence of other elements between the two elements.

[0009] As used herein, “about,” “approximately,” or “substantially” includes the value and the average value within an acceptable range of deviations from a particular value as determined by one of ordinary skill in the art, taking into account the measurement in question and a particular number of errors associated with the measurement (i.e., limitations of the measurement system). For example, “about” may mean within one or more standard deviations of the value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, as used herein, “about,” “approximately,” or “substantially” may be used to select a more acceptable range of deviations or standard deviations depending on the optical, etched, or other properties, and may not apply to all properties with a single standard deviation.

[0010] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having the same meaning as they have in the context of the relevant technology and the present invention, and will not be interpreted as having an idealized or overly formal meaning unless expressly defined as such herein.

[0011] Figure 1 is a cross-sectional schematic diagram of an electronic system according to an embodiment of the present invention. Referring to Figure 1, the electronic system 1 includes a display device 10. The display device 10 includes a backlight module 100 and a display panel 200. The display panel 200 is disposed on the backlight module 100. The display panel 200 is a non-self-emissive display panel. For example, in some embodiments, the display panel 200 may be a liquid crystal display panel, but the present invention is not limited thereto. In some embodiments, the display device 10 may also optionally include a protective cover plate 300 disposed on the display panel 200.

[0012] Figure 2 is a top view schematic diagram of a reflective sheet, a light-emitting element, and a camera element according to an embodiment of the present invention. Referring to Figures 1 and 2, the backlight module 100 includes a reflective sheet 120, at least one light-emitting element 130, and at least one optical film 140. The at least one light-emitting element 130 is located on the reflective sheet 120. The at least one optical film 140 is located above the reflective sheet 120. In some embodiments, the light-emitting element 130 may be selectively located between the at least one optical film 140 and the reflective sheet 120, but the present invention is not limited thereto. For example, in some embodiments, the backlight module 100 may include three optical films 140, and the optical films 140 may include diffusers, prisms, etc. However, the present invention is not limited thereto, and the number and type of optical films 140 may be designed in other ways according to actual needs.

[0013] The reflective sheet 120 includes a first portion 121 and a second portion 122 outside the first portion 121. The first portion 121 of the reflective sheet 120 has an opening 121a. The first portion 121 is the region of the reflective sheet 120 immediately adjacent to the opening 121a. The second portion 122 is the region of the reflective sheet 120 away from the opening 121a. In some embodiments, the optical film 140 may also have an opening 142, and the opening 142 of the optical film 140 and the opening 121a of the reflective sheet 120 are used to allow an external light beam to pass through so that the external light beam can be transmitted to the imaging element 400. In some embodiments, the ratio of the area of ​​the first portion 121 of the reflective sheet 120 to the area of ​​the opening 121a may be greater than 120%, but the present invention is not limited thereto. In some embodiments, the imaging element 400 includes, for example, an infrared sensor, but the present invention is not limited thereto.

[0014] The first direction z is perpendicular to the optical film 140. The first portion 121 of the reflective sheet 120 and the optical film 140 have a first distance OD1 in the first direction z, and the second portion 122 of the reflective sheet 120 and the optical film 140 have a second distance OD2 in the first direction z, and the first distance OD1 is less than the second distance OD2. In some embodiments, the ratio of the second distance OD2 to the first distance OD1 (OD2 / OD1) may fall within the range of 1.5 to 5, but the present invention is not limited thereto.

[0015] In some embodiments, the display device 10 further includes an imaging element 400, which is disposed corresponding to the opening 121a of the first portion 121 of the reflective sheet 120. It is worth noting that the distance (i.e., the first distance OD1) between the reflective sheet 120 and the optical film 140 in the area near the opening 121a of the imaging element 400 is small. Therefore, even with a small opening 121a area of ​​the reflective sheet 120, a sufficiently large field of view (FOV) can be provided for the imaging element 400. Furthermore, since the distance (i.e., the second distance OD2) between the reflective sheet 120 and the optical film 140 in the area away from the opening 121a is large, a large FOV is provided while maintaining a good visual experience for the display device 10.

[0016] In some embodiments, each light-emitting element 130 includes a light-emitting chip 130a and a transparent encapsulation 130b covering the light-emitting chip 130a. In some embodiments, the light-emitting element 130 includes a plurality of first light-emitting elements 131 and a plurality of second light-emitting elements 132, wherein the plurality of first light-emitting elements 131 are disposed on a first portion 121 of a reflective sheet 120, and the plurality of second light-emitting elements 132 are disposed on a second portion 122 of the reflective sheet 120. In some embodiments, each first light-emitting element 131 further includes a diffuser 130c disposed on the transparent encapsulation 130b, and the transparent encapsulation 130b of each second light-emitting element 132 does not have a diffuser 130c disposed thereon, and the transparent encapsulation 130b of each second light-emitting element 132 can directly contact the air gap AG between the optical film 140 and the reflective sheet 120. This further optimizes the visual appeal of the display device 10. In some embodiments, the ratio of the area of ​​the diffuser 130c of the first light-emitting element 131 to the area of ​​the transparent encapsulation 130b of the first light-emitting element 131 may fall within the range of 20% to 60%, but the present invention is not limited thereto.

[0017] The second direction x is parallel to the optical film 140. In some embodiments, a plurality of first light-emitting elements 131 are arranged with a first spacing p1 in the second direction x, and a plurality of second light-emitting elements 132 are arranged with a second spacing p2 in the second direction x, and the ratio of the second spacing p2 to the first spacing p1 (p2 / p1) may fall within the range of 0.99 to 3. In some embodiments, the ratio of the second spacing p2 to the first spacing p1 (p2 / p1) may be greater than 1. That is, in some embodiments, the first spacing p1 may be smaller than the second spacing p2, but the present invention is not limited thereto.

[0018] In some embodiments, the backlight module 100 further includes a back frame 110. A reflective sheet 120 and an optical film 140 are sequentially disposed on the back frame 110. Notably, in some embodiments, the back frame 110 has a recess 112 recessed towards the display panel 200. A first portion 121 of the reflective sheet 120 overlaps the recess 112 of the back frame 110. The recess 112 may have an opening 112a corresponding to the imaging element 400, and at least a portion of the imaging element 400 is disposed in the recess 112 of the back frame 110. This allows for a thinner display device 10.

[0019] Referring to Figure 1, in addition to the aforementioned display device 10, the electronic system 1 also includes a processing element 20. The processing element 20 is at least electrically connected to the camera element 400. In some embodiments, the camera element 400 is used to capture a frontal image of the display device 10, and the processing element 20 (e.g., a computer) can cause any component of the electronic system 1 to generate a corresponding response based on the image captured by the camera element 400. For example, in some embodiments, the electronic system 1 is applied in a smart cockpit, where the camera element 400 can be used to capture driving images. If the processing element 20 determines that the driving condition is abnormal based on the driving images, the processing element 20 can cause the horn (not shown) to emit a warning sound and / or cause the display panel 200 to display a warning image, but the present invention is not limited thereto.

[0020] It must be noted that the following embodiments use the component reference numerals and some content of the foregoing embodiments, wherein the same reference numerals are used to represent the same or similar components, and the description of the same technical content is omitted. For the description of the omitted parts, please refer to the foregoing embodiments, and the following embodiments will not repeat them.

[0021] Figure 3 is a cross-sectional schematic diagram of an electronic system according to another embodiment of the present invention. Figure 4 is a top view schematic diagram of a reflector, light-emitting element, and imaging element according to another embodiment of the present invention. Referring to Figures 3 and 4, the electronic system 1A of this embodiment is similar to the aforementioned electronic system 1, except that: in this embodiment, the ratio (p2 / p1) of the second spacing p2 of the plurality of second light-emitting elements 132 to the first spacing p1 of the plurality of first light-emitting elements 131 can be 1. In addition, in this embodiment, the ratio (OD1 / p1) of the first distance OD1 to the first spacing p1 can be 0.4, and the ratio (OD2 / p2) of the second distance OD2 to the second spacing p2 can be 0.2.

[0022] Figure 5 is a cross-sectional schematic diagram of an electronic system according to another embodiment of the present invention. Figure 6 is a top view schematic diagram of a reflector, light-emitting element, and camera element according to another embodiment of the present invention. Referring to Figures 5 and 6, the electronic system 1B of this embodiment is similar to the aforementioned electronic system 1, except that the backlight module 100B of the electronic system 1B of this embodiment is different from the backlight module 100 of the aforementioned electronic system 1. Specifically, in this embodiment, the backlight module 100B further includes a reflective grid element 150 disposed on the reflector 120. The reflective grid element 150 has a first grid 151 and a plurality of second grids 152. A plurality of first light-emitting elements 131 are disposed in the same first grid 151. A plurality of second light-emitting elements 132 are respectively disposed in a plurality of second grids 152. Through the arrangement of the reflective grid element 150, the light distribution of the backlight module 100B can be more concentrated, which helps to improve optical performance and visual quality.

[0023] Figure 7 is a cross-sectional schematic diagram of an electronic system according to another embodiment of the present invention. Referring to Figure 7, the electronic system 1C of this embodiment is similar to the aforementioned electronic system 1, except that the backlight module 100C of the electronic system 1C of this embodiment is different from the backlight module 100 of the aforementioned electronic system 1. Specifically, in this embodiment, the backlight module 100C further includes a light guide plate 160 and a light blocking element 170. The light guide plate 160 is disposed between the first part 121 of the reflective sheet 120 and the optical film 140. The light guide plate 160 has a bottom surface 162 facing the first part 121 of the reflective sheet 120, a light emitting surface 164 opposite to the bottom surface 162, and a light incident surface 166 connecting the bottom surface 162 and the light emitting surface 164, and the first light emitting element 131 is disposed next to the light incident surface 166 of the light guide plate 160. In this embodiment, the ratio of the thickness t of the light guide plate 160 in the first direction z to the first distance OD1 can fall within the range of 0.25 to 1. An air gap AG exists between the second portion 122 of the reflector 120 and the optical film 140. A light-blocking element 170 separates the air gap AG from the light guide plate 160. A portion of the first portion 121 of the reflector 120 in the backlight module 100C is side-lit, while a portion of the second portion 122 of the reflector 120 in the backlight module 100C is direct-lit.

[0024] Figure 8 is a cross-sectional schematic diagram of an electronic system according to an embodiment of the present invention. Referring to Figure 8, the electronic system 1D of this embodiment is similar to the aforementioned electronic system 1, except that the backlight module 100D of the electronic system 1D of this embodiment is different from the backlight module 100 of the aforementioned electronic system 1. Specifically, in this embodiment, the distance OD between a point 120p on the reflective sheet 120 and the optical film 140 in the first direction z gradually decreases as the point 120p approaches the opening 121a. In this embodiment, the reflective sheet 120D and the optical film 140 may be at an angle. The angle may fall within the range of 5° to 25°.

[0025] Figure 9 is a cross-sectional schematic diagram of an electronic system according to another embodiment of the present invention. Referring to Figure 9, the electronic system 1E of this embodiment is similar to the electronic system 1D of Figure 8. The reflector 120E and the optical film 140 of the electronic system 1E in Figure 9 also have an angle. The difference between the two is that in the embodiment of Figure 8, the light incident method of the backlight module 100D is side-lit; in the embodiment of Figure 9, the light incident method of the backlight module 100E is direct-lit. [Simplified Explanation of the Diagram]

[0026] Figure 1 is a cross-sectional schematic diagram of an electronic system according to an embodiment of the present invention. Figure 2 is a top view schematic diagram of a reflective sheet, a light-emitting element, and a camera element according to an embodiment of the present invention. Figure 3 is a cross-sectional schematic diagram of an electronic system according to another embodiment of the present invention. Figure 4 is a top view schematic diagram of a reflective sheet, a light-emitting element, and a camera element according to another embodiment of the present invention. Figure 5 is a cross-sectional schematic diagram of an electronic system according to yet another embodiment of the present invention. Figure 6 is a top view schematic diagram of a reflective sheet, a light-emitting element, and a camera element according to yet another embodiment of the present invention. Figure 7 is a cross-sectional schematic diagram of an electronic system according to yet another embodiment of the present invention. Figure 8 is a cross-sectional schematic diagram of an electronic system according to an embodiment of the present invention. Figure 9 is a cross-sectional schematic diagram of an electronic system according to another embodiment of the present invention.

Claims

1. A display device, comprising: A backlight module includes: a reflective sheet including a first portion and a second portion outside the first portion, wherein the first portion of the reflective sheet has an opening; at least one light-emitting element located on the reflective sheet; and at least one optical film located above the reflective sheet, wherein a first direction is perpendicular to the at least one optical film, the first portion of the reflective sheet and the at least one optical film have a first distance in the first direction, the second portion of the reflective sheet and the at least one optical film have a second distance in the first direction, and the first distance is less than the second distance; and a display panel disposed on the backlight module.

2. The display device as claimed in claim 1, further comprising: An imaging element is provided corresponding to the opening in the first part of the reflector.

3. The display device as claimed in claim 2, wherein the backlight module further comprises: A back frame has a recessed portion recessed toward the display panel, wherein the first portion of the reflective sheet overlaps the recessed portion of the back frame, and at least a portion of the camera element is disposed in the recessed portion of the back frame.

4. The display device as claimed in claim 1, wherein the ratio of the area of ​​the first portion of the reflector to the area of ​​the opening is greater than 120%.

5. The display device as claimed in claim 1, wherein the ratio of the second distance to the first distance falls within the range of 1.5 to 5.

6. The display device as claimed in claim 1, wherein the at least one light-emitting element comprises: Multiple first light-emitting elements are disposed on the first part of the reflective sheet; And a plurality of second light-emitting elements are disposed on the second part of the reflective sheet; wherein a second direction is parallel to the at least one optical film, the first light-emitting elements are arranged at a first spacing in the second direction, the second light-emitting elements are arranged at a second spacing in the second direction, and the first spacing is smaller than the second spacing.

7. The display device as claimed in claim 1, wherein the at least one light-emitting element comprises: Multiple first light-emitting elements are disposed on the first part of the reflective sheet; And a plurality of second light-emitting elements are disposed on the second part of the reflective sheet; wherein a second direction is parallel to the at least one optical film, the first light-emitting elements are arranged at a first spacing in the second direction, the second light-emitting elements are arranged at a second spacing in the second direction, and the ratio of the second spacing to the first spacing falls in the range of 0.99 to 3.

8. The display device of claim 1, wherein each of the at least one light-emitting element comprises a light-emitting chip and a transparent package covering the light-emitting chip, the at least one light-emitting element comprising: Multiple first light-emitting elements are disposed on the first part of the reflective sheet, wherein each first light-emitting element further includes a diffuser disposed on the transparent encapsulation body; And a plurality of second light-emitting elements are disposed on the second part of the reflective sheet, wherein the transparent encapsulation of each second light-emitting element is in direct contact with an air gap between the at least one optical film and the reflective sheet.

9. The display device of claim 8, wherein the ratio of the area of ​​the diffuser of the first light-emitting element to the area of ​​the transparent encapsulation of the first light-emitting element falls within the range of 20% to 60%.

10. The display device as claimed in claim 1, wherein the at least one light-emitting element includes a plurality of first light-emitting elements disposed on the first portion of the reflective sheet and a plurality of second light-emitting elements disposed on the second portion of the reflective sheet, and the backlight module further includes: A reflective grid element is disposed on the reflective sheet and has a first grid and a plurality of second grids, wherein the first light-emitting elements are disposed in the same first grid and the second light-emitting elements are respectively disposed in the second grids.

11. The display device as claimed in claim 1, wherein the at least one light-emitting element includes a first light-emitting element disposed on the first portion of the reflective sheet and a second light-emitting element disposed on the second portion of the reflective sheet, and the backlight module further includes: A light guide plate is disposed between the first portion of the reflector and the at least one optical film, wherein the light guide plate has a bottom surface facing the first portion of the reflector, a light emitting surface opposite the bottom surface, and a light incident surface connecting the bottom surface and the light emitting surface, and the first light-emitting element is disposed next to the light incident surface of the light guide plate; and a light-blocking element separates the second portion of the reflector and the at least one optical film from the light guide plate.

12. The display device as claimed in claim 11, wherein the ratio of the thickness of the light guide plate in the first direction to the first distance falls within the range of 0.25 to 1.

13. The display device of claim 1, wherein a distance between a point on the reflector and the at least one optical film in the first direction gradually decreases as the point approaches the opening.

14. An electronic system comprising: A backlight module includes: a reflective sheet including a first portion and a second portion outside the first portion, wherein the first portion of the reflective sheet has an opening; at least one light-emitting element located on the reflective sheet; and at least one optical film located above the reflective sheet, wherein a first direction is perpendicular to the at least one optical film, the first portion of the reflective sheet and the at least one optical film have a first distance in the first direction, the second portion of the reflective sheet and the at least one optical film have a second distance in the first direction, and the first distance is less than the second distance; a display panel disposed on the backlight module; a camera element disposed corresponding to the opening of the first portion of the reflective sheet; and a processing element electrically connected to the camera element.

Images