Miniature display screen for AR waveguide lens and AR waveguide lens

Abstract

The utility model belongs to the field of AR (Augmented Reality) glasses, and discloses a miniature display screen for an AR waveguide lens, which can adjust the temperature of the miniature display screen to enable the temperature of the miniature display screen to be within an applicable temperature range of LCOS (Liquid Crystal On Silicon), thereby ensuring that the service life of the AR waveguide lens or the AR experience of a user is not influenced. Comprising a display screen body, a heat conduction patch piece, an electrothermal film and a semiconductor chilling plate, the heat conduction patch piece is bonded to the display screen body through heat conduction silica gel, the electrothermal film and the semiconductor chilling plate are bonded to the heat conduction patch piece through the heat conduction silica gel, heat is generated through the electrothermal film, and heat conduction is conducted on the electrothermal film through the heat conduction patch piece. The display screen body is heated; a cold source is generated through the semiconductor chilling plate, heat conduction is conducted on the electric heating film through the heat conduction patch piece, and the display screen body descends. The utility model also discloses an AR waveguide lens.

Description

Technical Field

[0001] The utility model belongs to the field of AR glasses, and specifically relates to a micro display screen for an AR waveguide lens and an AR waveguide lens. Background Art

[0002] AR waveguide lenses are the core and key components of AR glasses. They receive external visual signals and present them visually through a micro display screen, thereby presenting virtual images in the user's field of view.

[0003] At present, since the micro display screen is realized through LCOS (liquid crystal on silicon, the same below) technology, it has an applicable operating temperature range, usually -10℃ to 60℃. If the temperature of the micro display screen is not within this temperature range, the micro display screen will be obviously distorted or fail to light up. The micro display screen used in AR waveguide lenses is an exposed design. Therefore, in some application scenarios, the temperature of the micro display screen will exceed the applicable temperature range due to the surrounding ambient temperature, resulting in obvious distortion or failure to light up, thereby affecting the service life of the AR waveguide lens or the user's AR experience. Utility Model Content

[0004] In view of the shortcomings of the prior art, the utility model provides a micro display screen for an AR waveguide lens and an AR waveguide lens, which can adjust the temperature of the micro display screen so that its temperature is within the applicable temperature range of LCOS, thereby ensuring that the service life of the AR waveguide lens or the user's AR experience is not affected.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A micro display screen for an AR waveguide lens receives external visual signals and displays them visually, and is characterized in that it includes: a display screen body, a heat-conducting patch, an electric heating film, and a semiconductor cooling sheet, wherein the heat-conducting patch is bonded to the display screen body through heat-conducting silicone, and the electric heating film and the semiconductor cooling sheet are both bonded to the heat-conducting patch through heat-conducting silicone.

[0007] Preferably, the electric heating film and the semiconductor cooling sheet are both surface-bonded to the thermally conductive patch.

[0008] Preferably, the electric heating film is an FPC electric heating film with a thickness ranging from 0.3MM to 0.8MM.

[0009] Preferably, the electric heating film and the semiconductor cooling sheet are both bonded to the same surface of the heat conductive patch and separated by heat insulating silica gel.

[0010] Furthermore, the utility model also includes a patch temperature sensor, which is mounted on the display screen body. The patch temperature sensor detects the surface temperature of the display screen body in real time. The thermal conductive patch corresponds to the patch temperature sensor and the electric heating film through different surfaces.

[0011] An AR waveguide lens, worn on the user's head, is characterized in that it includes: a lens body, which is set to block the user's eyes, an AR display module, which is connected to the lens body, the AR display module has a module packaging shell, the module packaging shell has a shell side and a shell end face that are perpendicular to each other, the shell side face faces the user's cheek, and a micro display screen, which is the above-mentioned micro display screen for the AR waveguide lens, wherein the display screen body is veneered on the shell end face.

[0012] Preferably, the utility model further comprises a cheek protection sheet, which is arranged on the side of the shell and blocks the module packaging shell and the display screen body from the cheek of the user.

[0013] Preferably, the display screen body has a display surface and a backlight surface, the display surface visualizes external visual signals, the thermal conductive patch is bonded to the backlight surface, and the electric heating film, semiconductor cooling sheet and backlight surface are respectively located on opposite sides of the thermal conductive patch.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. Because the AR waveguide lens of the utility model uses a micro display screen, including a display screen body, a heat-conducting patch, an electric heating film and a semiconductor cooling sheet, the heat-conducting patch is bonded to the display screen body through heat-conducting silicone, and the electric heating film and the semiconductor cooling sheet are bonded to the heat-conducting patch through heat-conducting silicone, heat is generated by the electric heating film, and heat is conducted to the electric heating film through the heat-conducting patch, so that the display screen body is heated up; a cold source is generated by the semiconductor cooling sheet, and heat is conducted to the electric heating film through the heat-conducting patch, so that the display screen body is cooled down; therefore, the utility model can adjust the temperature of the micro display screen so that its temperature is within the applicable temperature range of LCOS, thereby ensuring that the service life of the AR waveguide lens or the user's AR experience is not affected.

[0016] 2. Because the utility model also includes a patch temperature sensor attached to the display screen body, the thermally conductive patch component corresponds to the patch temperature sensor and the electric heating film through different surfaces. Therefore, the utility model can obtain the real-time temperature of the thermally conductive patch component thermally connected to the display screen body through the patch temperature sensor, thereby facilitating heating or cooling the display screen body according to the real-time temperature.

[0017] 3. Because the display screen body of the utility model has a display surface and a backlight surface, the display surface visualizes the external visual signal, the thermal conductive patch is bonded to the backlight surface, and the electric heating film, the semiconductor cooling sheet and the backlight surface are respectively located on the opposite sides of the thermal conductive patch. Therefore, the electric heating film, the semiconductor cooling sheet and the thermal conductive patch of the utility model will not affect the visual display of the display screen body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of an AR waveguide lens according to an embodiment of the present invention.

[0019] In the figure: 100, AR waveguide lens, 10, lens body, 20, module packaging shell, 21, shell side, 22, shell end face, 30, cheek guard, 41, display body, 42, thermal conductive patch, 43, electric heating film, 44, semiconductor cooling sheet, 45, patch temperature sensor. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the following embodiments and drawings specifically illustrate the AR waveguide lens micro display screen and AR waveguide lens of the present invention. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0021] like Figure 1 As shown, the AR waveguide lens 100 in this embodiment is worn on the user's head.

[0022] The AR waveguide lens 100 includes a lens body 10, an AR display module, a cheek guard 30 and a micro display screen. In this embodiment, the AR waveguide lens 100 includes an external control module.

[0023] The lens body 10 is disposed to cover the eyes of the user.

[0024] The AR display module is connected to the lens body 10, and the AR display module has a module packaging shell 20. Specifically, the AR display module can be easily purchased on the market. The AR display module is an optical structure composed of a packaged set of reflective lenses, dichroic prisms and transmission prisms. The module packaging shell 20 has a light incident port (not shown in the drawings) and a light outlet port (not shown in the drawings). The visual image emitted by the micro display screen enters the optical structure through the light incident port, and is finally emitted from the light outlet port to the lens body 10, forming a virtual scene that can be seen by the user.

[0025] Specifically, the light incident port corresponds to the micro display screen, and the light exit port corresponds to the lens body 10 .

[0026] The module packaging shell 20 has a shell side surface 21 and a shell end surface 22 which are perpendicular to each other. The shell side surface 21 faces the cheek of the user. In this embodiment, the module packaging shell 20 is connected to the lens body 10 at an angle.

[0027] The cheek guard 30 is arranged on the side surface 21 of the housing.

[0028] The micro display screen is disposed on the end surface 22 of the housing, and includes a display screen body 41 , a heat-conducting patch 42 , an electric heating film 43 , a semiconductor cooling sheet 44 and a patch-type temperature sensor 45 .

[0029] The display screen body 41 has a display surface (not shown in the drawings) and a backlight surface (not shown in the drawings). The display surface visualizes external visual signals and displays them toward the lens body 10. The thermal conductive patch 42 is bonded to the backlight surface. The electric heating film 43, the semiconductor cooling film 44 and the backlight surface are respectively located on the opposite sides of the thermal conductive patch 42. Specifically, the electric heating film is an FPC electric heating film with a thickness ranging from 0.3MM to 0.8MM.

[0030] The heat-conducting patch 42 is bonded to the display screen body 41 through heat-conducting silicone rubber, and the electric heating film 43 and the semiconductor cooling sheet 44 are bonded to the heat-conducting patch 42 through heat-conducting silicone rubber. Specifically, the heat-conducting patch 42 is a copper plate.

[0031] The electric heating film 43 and the semiconductor cooling sheet 44 are both bonded to the thermally conductive patch 42, and the electric heating film 43 and the semiconductor cooling sheet 44 are both bonded to the same surface of the thermally conductive patch 42 and separated by thermal insulating silicone to form thermal isolation from each other.

[0032] The chip temperature sensor 45 is attached to the display screen body 41. The chip temperature sensor 45 detects the surface temperature of the display screen body 41 in real time. The thermal conductive patch 42 corresponds to the chip temperature sensor 45 and the electric heating film 43 through different surfaces. Specifically, the chip temperature sensor 45 is close to the side of the thermal conductive patch 42, and the electric heating film 43 and the semiconductor cooling film 44 are bonded to the end face of the thermal conductive patch 42. Therefore, the interference of the electric heating film 43 and the semiconductor cooling film 44 on the temperature detection of the chip temperature sensor 45 is reduced.

[0033] Specifically, the cheek guard 30 blocks the module packaging shell 20 and the display screen body 41 from the cheek of the user.

[0034] In this embodiment, the electric heating film 43, the semiconductor cooling sheet 44 and the surface mount temperature sensor 45 are all connected to the external control module signal. The control module selectively heats up or cools the display body 41 through the electric heating film 43 or the semiconductor cooling sheet 44 based on the real-time temperature of the display body 41 detected by the surface mount temperature sensor 45.

[0035] The above-mentioned implementation modes are preferred cases of the present utility model and are not used to limit the protection scope of the present utility model. Various deformations or modifications that can be made by ordinary technicians in this field without creative work within the scope of the attached claims are still within the protection scope of this patent.

Claims

1. A micro display screen for AR waveguide lenses, which receives external visual signals and displays them visually, characterized in that: include: Display screen body, thermal conductive patch, electric heating film and semiconductor cooling sheet, The heat-conducting patch is bonded to the display screen body through heat-conducting silica gel, and the electric heating film and the semiconductor cooling sheet are bonded to the heat-conducting patch through heat-conducting silica gel.

2. The micro display screen for AR waveguide lenses according to claim 1, characterized in that: in, The electric heating film and the semiconductor cooling sheet are both bonded to the surface of the heat conductive patch.

3. The micro display screen for AR waveguide lens according to claim 1, characterized in that: in, The electric heating film is an FPC electric heating film with a thickness ranging from 0.3MM to 0.8MM.

4. The micro display screen for AR waveguide lenses according to claim 1, characterized in that: in, The electric heating film and the semiconductor refrigeration sheet are both bonded to the same surface of the heat-conducting patch and are separated by heat-insulating silica gel.

5. The micro display screen for AR waveguide lenses according to claim 4, characterized in that: Also includes: The chip temperature sensor is mounted on the display screen body, and the chip temperature sensor detects the surface temperature of the display screen body in real time. The thermally conductive patch component corresponds to the patch temperature sensor and the electric heating film through different surfaces.

6. An AR waveguide lens, worn on the head of a user, characterized in that: include: The lens body is set to block the user's eyes. An AR display module is connected to the lens body, and the AR display module has a module packaging shell, wherein the module packaging shell has a shell side surface and a shell end surface that are perpendicular to each other, and the shell side surface faces the cheek of the user, A micro display screen, which is a micro display screen for an AR waveguide lens as claimed in any one of claims 1 to 5, Wherein, the display screen body is disposed on the end surface of the shell.

7. The AR waveguide lens according to claim 6, characterized in that: Also includes: The cheek protection sheet is arranged on the side of the shell and blocks the module packaging shell and the display screen body from the cheek of the user.

8. The AR waveguide lens according to claim 6, characterized in that: in, The display screen body has a display surface and a backlight surface, the display surface visualizes external visual signals, the thermal conductive patch is bonded to the backlight surface, and the electric heating film, the semiconductor cooling sheet and the backlight surface are respectively located on two opposite sides of the thermal conductive patch.

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