CN215340618U

CN215340618U - Display device and electronic apparatus

Info

Publication number: CN215340618U
Application number: CN202120731936.7U
Authority: CN
Inventors: 李德华
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2021-12-28
Anticipated expiration: 2031-04-09

Abstract

The application provides a display device and electronic equipment, wherein the display device comprises a backlight module and a liquid crystal display module; the backlight module comprises a light source and a digital micro-mirror device; the digital micro-mirror device is arranged opposite to the light source and is used for receiving the light emitted by the light source; the liquid crystal display module is arranged opposite to the digital micromirror device; the digital micro-mirror device is used for projecting light to the liquid crystal display module to backlight the liquid crystal display module. The display device that this application embodiment provided, utilize the digital micro mirror device to project the backlight on the liquid crystal display module assembly, the digital micro mirror device is as the optical control switch of pixel level, can position and the pattern that accurate control is shaded, needs dark position can not throw and is shaded, realizes the pure black effect that complete no is shaded, and then promotes the contrast that shows.

Description

Display device and electronic apparatus

Technical Field

The present invention relates to the technical field of display device structures, and in particular, to a display device and an electronic apparatus.

Background

The liquid crystal display screen does not self-emit light, a uniform backlight source is required to irradiate from the back, and then a lower polaroid, the liquid crystal rotate, the color film and the upper polaroid form colored patterns. The light source is always irradiated on the back, and even if the liquid crystal screen is in a black picture state, light still penetrates through all layers of the screen, so that the black picture is not pure black, and the liquid crystal contrast is low.

SUMMERY OF THE UTILITY MODEL

A first aspect of embodiments of the present application provides a display device, including:

backlight module, including:

a light source;

the digital micro-mirror device is arranged opposite to the light source and is used for receiving the light emitted by the light source;

the liquid crystal display module is arranged opposite to the digital micromirror device; the digital micro-mirror device is used for projecting light to the liquid crystal display module to backlight the liquid crystal display module.

In a second aspect, an embodiment of the present application provides an electronic device, which includes a housing and the display device described in any one of the above embodiments; the shell is matched with the liquid crystal display module to form an accommodating space, and the backlight module is arranged in the accommodating space.

The display device that this application embodiment provided, utilize the digital micro mirror device to project the backlight on the liquid crystal display module assembly, the digital micro mirror device is as the optical control switch of pixel level, can position and the pattern that accurate control is shaded, needs dark position can not throw and is shaded, realizes the pure black effect that complete no is shaded, and then promotes the contrast that shows.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic overall structure diagram of an embodiment of a display device for an electronic apparatus according to the present application;

FIG. 2 is a schematic diagram of the reflection principle of a micromirror in the digital micromirror device;

figure 3 is a schematic diagram of another state of the micro mirror of figure 2;

FIG. 4 is a schematic diagram of the LCD module shown in FIG. 1;

FIG. 5 is a schematic view of the overall structure of another embodiment of the display device of the present application;

FIG. 6 is a schematic view of the overall structure of another embodiment of the display device of the present application;

FIG. 7 is a schematic diagram of the overall structure of yet another embodiment of the display device of the present application;

FIG. 8 is a schematic view of the overall structure of yet another embodiment of the display device of the present application;

FIG. 9 is a schematic structural diagram of an embodiment of an electronic device of the present application;

fig. 10 is a block diagram illustrating a structural composition of an embodiment of an electronic device according to the present application.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be noted that the following examples are only illustrative of the present invention, and do not limit the scope of the present invention. Likewise, the following examples are only some but not all examples of the present invention, and all other examples obtained by those skilled in the art without any inventive step are within the scope of the present invention.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the utility model. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As used herein, an "electronic device" (or simply "terminal") includes, but is not limited to, an apparatus that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). A communication terminal arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. The mobile phone and the television are electronic equipment provided with a cellular communication module.

Referring to the drawings, fig. 1 is a schematic overall structure diagram of an embodiment of a display device for an electronic device according to the present application; it should be noted that the electronic device in the present application may include an electronic device with a display device, such as a mobile phone, a television, a tablet computer, a notebook computer, and a wearable device. The display device 10 for electronic equipment includes, but is not limited to, a backlight module 100 and a liquid crystal display module 200. It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the embodiments of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or may alternatively include other steps or elements inherent to such process, method, article, or apparatus.

Specifically, the backlight module 100 includes a light source 110 and a digital micromirror device 120. The digital micromirror 120 is disposed opposite to the light source 110 and is used for receiving the light emitted from the light source 110. The liquid crystal display module 200 is arranged opposite to the digital micromirror device 120; the digital micro-mirror 120 is used for projecting light to the liquid crystal display module 200 to backlight the liquid crystal display module 200. The lines with arrows in the figure represent light rays or light paths.

Wherein, the Digital Micromirror Device 120 has an english name of Digital Micromirror Device, DMD for short; the digital micromirror device 120 is a kind of optical switch, and the opening and closing of the optical switch are realized by using a rotating mirror. Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a reflection principle of a micromirror in the digital micromirror device; fig. 3 is a schematic diagram of another state of the micro mirror of fig. 2. The digital micromirror 120 includes a plurality of pixel-level micro-mirrors 121 that are independently controlled, and the digital micromirror 120 can rotate to determine the light reflection direction of the micro-mirror 121 corresponding to each pixel, thereby enabling the digital micromirror 120 to project a patterned backlight onto the liquid crystal display module 200. The backlight can not be projected at the position needing the darkness, the pure black effect without the backlight is realized, and the corresponding backlight pattern is projected at the position needing the backlight. In fig. 2 and 3, reference numeral 55 denotes a target light receiving device, which may be a liquid crystal display module, a projection lens (detailed in the following embodiments), or the like in this embodiment.

Optionally, referring to fig. 4, fig. 4 is a schematic diagram illustrating a structure of a liquid crystal display module in the embodiment of fig. 1 in a disassembled manner, and the liquid crystal display module 200 in this embodiment may include a lower polarizer 210, an array substrate 220, a color film substrate 230, and an upper polarizer 240. The lower polarizer 210, the array substrate 220, the color filter substrate 230, and the upper polarizer 240 are sequentially stacked. The detailed structural features of the lcd module 200 are substantially the same as those of the lcd module in the conventional art, and are not repeated herein within the understanding range of those skilled in the art.

Referring to fig. 5, fig. 5 is a schematic overall structure diagram of another embodiment of the display device of the present application; the display device 10 in the present embodiment includes, but is not limited to, a backlight module 100 and a liquid crystal display module 200. Specifically, unlike the previous embodiments, the backlight module 100 of the present embodiment includes a light source 110, a digital micromirror device 120, and a projection lens 130. The digital micromirror 120 is disposed opposite to the light source 110 and is used for receiving the light emitted from the light source 110. The projection lens 130 is disposed between the digital micromirror device 120 and the light path of the liquid crystal display module 200, and is configured to project the light emitted from the digital micromirror device 120 to the liquid crystal display module 200. The dmd 120 includes a plurality of independently controlled pixel-level micromirrors (shown in fig. 2 and 3), and by controlling the plurality of pixel-level micromirrors, the dmd 120 can emit a back light with a transmissive pattern to the projection lens 130. The projection lens 130 may include a plurality of lenses sequentially disposed along the optical path. For the detailed structure of the digital micromirror device 120 and the liquid crystal display module 200, refer to the related description of the aforementioned embodiments, and will not be repeated here.

Referring to fig. 6, fig. 6 is a schematic overall structure diagram of another embodiment of a display device of the present application; the display device 10 in the present embodiment includes, but is not limited to, a backlight module 100 and a liquid crystal display module 200. Specifically, unlike the previous embodiments, the backlight module 100 of the present embodiment includes a light source 110, a digital micromirror device 120, a projection lens 130, and a shaping mirror 140. The digital micromirror 120 is disposed opposite to the light source 110 and is used for receiving the light emitted from the light source 110. The projection lens 130 is disposed between the digital micromirror device 120 and the light path of the liquid crystal display module 200, and is configured to project the light emitted from the digital micromirror device 120 to the liquid crystal display module 200. The shaping mirror 140 is disposed between the light source 110 and the optical path of the dmd 120, and is used to shape the light emitted from the light source 110 and reflect the light to the dmd 120. The number of the light sources 110 may be a plurality or a stripe structure, and after passing through the shaping mirror 140, the light may be more focused. In addition, please refer to the related description of the aforementioned embodiments for the detailed structure of the dmd 120, the projection lens 130 and the lcd module 200, which is not repeated here.

Optionally, the display device 10 in this embodiment may further include a control circuit board 300, wherein the control circuit board 300 is electrically connected to the light source 110 of the backlight module 100 and the digital micro-mirror device 120, and is configured to control the working states of the light source 110 and the digital micro-mirror device 120. It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the display device in this embodiment, the digital micromirror is used to project the backlight source onto the liquid crystal display module, and the digital micromirror is used as a pixel-level optical control switch, so that the position and pattern of the backlight can be accurately controlled, and the backlight can not be projected at a dark position, thereby realizing a complete pure black effect without backlight and further improving the display contrast; in addition, the shaping reflector is arranged between the light source and the light path of the digital micro-mirror device, so that light emitted by the light source can be focused more, and the utilization rate of light of the light source is improved.

Referring to fig. 7, fig. 7 is a schematic overall structure diagram of a display device according to still another embodiment of the present application; the display device 10 in the present embodiment includes, but is not limited to, a backlight module 100 and a liquid crystal display module 200. Specifically, the backlight module 100 in the present embodiment includes a light source 110, a digital micromirror device 120, a projection lens 130, and a shaping mirror 140. The digital micromirror 120 is disposed opposite to the light source 110 and is used for receiving the light emitted from the light source 110. The projection lens 130 is disposed between the digital micromirror device 120 and the light path of the liquid crystal display module 200, and is configured to project the light emitted from the digital micromirror device 120 to the liquid crystal display module 200. The shaping mirror 140 is disposed between the light source 110 and the optical path of the dmd 120, and is used to shape the light emitted from the light source 110 and reflect the light to the dmd 120. Different from the previous embodiments, the light source 110 in the present embodiment may be a three-color light laser source, so as to improve the display saturation. Please refer to the related description of the aforementioned embodiments for the detailed structures of the dmd 120, the projection lens 130, the shaping mirror 140 and the lcd module 200, which is not repeated here.

Referring to fig. 8, fig. 8 is a schematic overall structure diagram of a display device according to still another embodiment of the present application; the display device 10 in the present embodiment includes, but is not limited to, a backlight module 100 and a liquid crystal display module 200. Specifically, the backlight module 100 in the present embodiment includes a light source 110, a digital micromirror device 120, a projection lens 130, and a shaping mirror 140. The digital micromirror 120 is disposed opposite to the light source 110 and is used for receiving the light emitted from the light source 110. The projection lens 130 is disposed between the digital micromirror device 120 and the light path of the liquid crystal display module 200, and is configured to project the light emitted from the digital micromirror device 120 to the liquid crystal display module 200. The shaping mirror 140 is disposed between the light source 110 and the optical path of the dmd 120, and is used to shape the light emitted from the light source 110 and reflect the light to the dmd 120. Unlike the previous embodiments, the light source 110 in this embodiment may include a blue light emitter 111 and a quantum dot device 112, wherein the blue light emitter 111 illuminates the quantum dot device 112 to excite an original light, and the original light passes through the shaping mirror 140 and then is transmitted to the digital micro-mirror 120. The quantum dot device 112 may be a quantum dot film or a quantum dot tube, and is not limited herein. For the detailed structure of the dmd 120, the projection lens 130, the shaping mirror 140 and the lcd module 200, reference is made to the related description of the aforementioned embodiments, and the description is not repeated here. It should be noted that the terms "first", "second" and "third" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

According to the display device in the embodiment of the application, the digital micro-mirror device is used for projecting the backlight source onto the liquid crystal display module and is used as the pixel-level optical control switch, so that the position and the pattern of backlight can be accurately controlled, the backlight can not be projected at a dark position, the complete pure black effect without backlight is realized, and the display contrast is further improved; in addition, the display saturation of the display device can be further improved by designing a matching structure of the blue light emitter and the quantum dot device.

Further, an electronic device is provided in an embodiment of the present application, please refer to fig. 9, where fig. 9 is a schematic structural diagram of an embodiment of the electronic device of the present application, and the electronic device in the embodiment may include an electronic device with a display device, such as a mobile phone, a television, a tablet computer, a notebook computer, and a wearable device. In the present embodiment, only a television is taken as an example for description. The electronic apparatus includes a housing 20 and a display device 10; the housing 20 and the liquid crystal display module 200 cooperate to form an accommodating space 1000, and the backlight module 100 is disposed in the accommodating space 1000. Other structural features of the electronic device are within the understanding of those skilled in the art, and are not repeated herein, and reference is made to the related description of the foregoing embodiment for the structural features of the display device 10.

Referring to fig. 10, fig. 10 is a block diagram illustrating a structure of an embodiment of an electronic device according to the present application, where the structure of the electronic device may include an RF circuit 910, a memory 920, an input unit 930, a display unit 940 (i.e., the display device 10 in the foregoing embodiment), a sensor 950, an audio circuit 960, a wifi module 970, a processor 980, a power supply 990, and the like. Wherein the RF circuit 910, the memory 920, the input unit 930, the display unit 940, the sensor 950, the audio circuit 960, and the wifi module 970 are respectively connected with the processor 980; power supply 990 is operable to provide power to the entire electronic device 10.

Specifically, the RF circuit 910 is used for transmitting and receiving signals; the memory 920 is used for storing data instruction information; the input unit 930 is used for inputting information, and may specifically include a touch panel 931 and other input devices 932 such as operation keys; the display unit 940 may include a display panel 941; the sensor 950 includes an infrared sensor, a laser sensor, etc. for detecting a user approach signal, a distance signal, etc.; a speaker 961 and a microphone 962 are connected to the processor 980 through the audio circuit 960 for emitting and receiving sound signals; the wifi module 970 is used for receiving and transmitting wifi signals, and the processor 980 is used for processing data information of the electronic device. With reference to the description of the above embodiments, the structural features of the housing assembly and the camera module of the electronic device will not be described in detail herein.

The electronic equipment that this application embodiment provided, its display device utilize the digital micro mirror device to project the backlight on the liquid crystal display module assembly, and the digital micro mirror device is as the optical control switch of pixel level, and position and pattern that can accurate control is shaded need dark position can not project and is shaded, realizes the pure black effect that complete no is shaded, and then promotes the contrast that shows.

The above description is only a part of the embodiments of the present invention, and not intended to limit the scope of the present invention, and all equivalent devices or equivalent processes performed by the present invention through the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A display device, characterized in that the display device comprises:

backlight module, including:

a light source;

2. The display device according to claim 1, wherein the backlight module further comprises a projection lens disposed between the digital micromirror device and the light path of the liquid crystal display module and configured to project the light emitted from the digital micromirror device to the liquid crystal display module.

3. The display device according to claim 2, wherein the backlight module further comprises a shaping mirror disposed between the light source and the light path of the digital micromirror device for shaping the light emitted from the light source and reflecting the light to the digital micromirror device.

4. A display device as claimed in claim 3, characterized in that the light source is a three-color light laser light source.

5. The display device of claim 3, wherein the light source comprises a blue light emitter and a quantum dot device, and wherein the blue light emitter illuminates the quantum dot device to excite the original light.

6. The display device of claim 3, wherein the digital micromirror device comprises a plurality of independently controlled pixel-level micromirrors, and the digital micromirror device emits a patterned backlight to the projection lens by controlling the plurality of pixel-level micromirrors.

7. The display device according to claim 3, wherein the liquid crystal display module comprises a lower polarizer, an array substrate, a color film substrate and an upper polarizer, which are sequentially stacked.

8. The display device of claim 2, wherein the projection lens comprises a plurality of mirrors disposed in series along the optical path.

9. The display device according to claim 3, further comprising a control circuit board electrically connected to the light source and the digital micromirror device.

10. An electronic apparatus, characterized in that the electronic apparatus comprises a housing and the display device of any one of claims 1-9; the shell is matched with the liquid crystal display module to form an accommodating space, and the backlight module is arranged in the accommodating space.