WO2021128818A1

WO2021128818A1 - Infrared touch screen and display device

Info

Publication number: WO2021128818A1
Application number: PCT/CN2020/102746
Authority: WO
Inventors: 余恒
Original assignee: 广州视源电子科技股份有限公司; 广州视睿电子科技有限公司
Priority date: 2019-12-23
Filing date: 2020-07-17
Publication date: 2021-07-01
Also published as: CN210895404U

Abstract

The present application relates to an infrared touch screen, comprising a display panel, a bearing table, an infrared frame, an optical filter strip, and an infrared light bar. The display panel is located above the bearing table; the optical filter strip is mounted on the infrared frame, and the optical filter strip works in conjunction with the infrared frame to form a closed cavity; the infrared light bar is mounted in the closed cavity, and an optical path of the infrared light bar runs through the optical filter strip and is parallel to an upper surface of the display panel; a water outlet channel is formed by the optical filter strip, the infrared frame, and the bearing table together. The infrared touch screen in the present application can effectively prevent moisture from penetrating into a backlight module while realizing a low touch height, thereby ensuring the reliability of a product.

Description

Infrared touch screen and display device

This application claims the priority of the patent application filed to the State Intellectual Property Office of China on December 23, 2019 with the application number 201922351575.9 and the invention title "Infrared Touch Screen and Display Device".

Technical field

This application relates to the technical field of touch screens, in particular to an infrared touch screen and a display device.

Background technique

Existing display devices, including infrared touch screens, in order to reduce the height of infrared touch as much as possible, the lower edge structure of the profile that fixes the infrared filter strip is cancelled, so that the filter strip directly touches the surface of the touch screen. As a result, the whole machine will be deformed, and the accuracy of parts and fitting tolerances will have a greater impact, which is likely to cause a gap between the filter bar and the surface of the touch screen. If the gap is too large, the water droplets on the surface of the touch screen or the residual moisture from the wet fabric wiping the surface of the touch screen will penetrate into the backlight module, causing the circuit structure on the infrared frame to short circuit or long-term water corrosion failure.

Utility model content

Based on this, the purpose of the present application is to overcome the shortcomings of the prior art and provide an infrared touch screen, which can effectively prevent moisture from penetrating into the backlight module while meeting the low touch height function, thereby ensuring the reliability of the product.

In order to achieve the above purpose, the technical solution adopted in this application is:

An infrared touch screen, comprising a display panel, a receiving platform, an infrared frame, a filter strip and an infrared light bar; the display panel is located above the receiving platform; the filter strip is installed on the infrared frame, And the filter bar cooperates with the infrared frame to form a closed cavity; the infrared light bar is installed in the closed cavity, and the light path of the infrared light bar passes through the filter bar and is parallel to the display panel. The upper surface; the filter strip, the infrared frame and the receiving platform jointly form a water outlet channel.

In the infrared touch screen of the present application, the infrared light bar is installed in a closed cavity formed by the cooperation of the filter strip and the infrared frame, and a water outlet channel is formed by the filter strip, the infrared frame and the receiving table, so that the display The moisture on the surface of the panel will penetrate into the gap formed between the filter strip and the display panel, and flow out of the outside along the water outlet channel, and will not immerse into the enclosed cavity and affect the performance of the infrared light strip; further, the filter strip It is arranged above the side of the display panel to reduce the structural thickness of the infrared touch screen, thereby reducing the height between the light path of the infrared light bar and the display panel, and achieving the effect of reducing the touch height.

In order to achieve better technical effects, further technical improvements also include that the bottom surface of the filter strip, the side of the infrared frame close to the receiving platform, and the side of the receiving platform close to the infrared frame jointly form a water outlet channel.

In order to achieve better technical effects, further technical improvements include that a gap is formed between the bottom surface of the filter strip and the upper surface of the display panel, and the gap is connected to the water outlet channel.

In order to achieve better technical effects, further technical improvements also include that the upper and lower ends of the filter strip are respectively clamped on the infrared frame.

In order to achieve better technical effects, further technical improvements also include that the upper and lower ends of the infrared light bar are respectively clamped in the enclosed cavity.

In order to achieve better technical effects, further technical improvements also include that the infrared light bar includes an infrared emitting tube and an infrared receiving tube, and the upper two sides of the display panel are symmetrically provided with a filter strip and an infrared frame, which are located in the same The filter strip on the side and the infrared frame cooperate to form a closed cavity, and the infrared emitting tube and the infrared receiving tube are respectively installed in the closed cavity on both sides of the display panel.

In addition, the present application also provides a display device, including the above-mentioned infrared touch screen provided by the present application.

In order to achieve better technical effects, further technical improvements also include a backlight module and an optical film set. The backlight module is arranged at the bottom of the display panel, and the optical film set is arranged on the display panel. And the backlight module.

In order to achieve better technical effects, further technical improvements also include that the optical film set is fixed on the backlight module through a middle frame, and a reflective layer is provided between the optical film set and the backlight module.

The display device of the present application solves the problem of poor waterproofness of the outer frame of the display device in the prior art while reducing the height of the infrared touch. Compared with the prior art, it significantly improves the product without increasing the manufacturing cost of the product. The quality of the product and the reliability of the product are guaranteed.

For a better understanding and implementation, the application will be described in detail below with reference to the drawings.

Description of the drawings

FIG. 1 is a schematic diagram of the structure of an infrared touch screen according to Embodiment 1 of the application;

2 is a schematic diagram of the structure of the water outlet channel in Example 1 of the application;

FIG. 3 is a partial schematic diagram of the display device according to Embodiment 2 of the application;

Fig. 4 is an enlarged schematic diagram of part A shown in Fig. 3.

Detailed ways

To further illustrate the various embodiments, this application provides drawings. These drawings are a part of the disclosure of the application, which are mainly used to illustrate the embodiments, and can cooperate with the relevant description in the specification to explain the operating principles of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present application.

In the description of this application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "left", " The orientation or positional relationship indicated by “right”, “top”, “bottom”, “inner”, “outer”, “axial”, “radial”, “circumferential”, etc. are based on the orientation or position shown in the drawings The relationship is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot understand the limitations of the application.

In the description of this application, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood under specific circumstances.

Example 1

As shown in FIGS. 1 and 2, this embodiment provides an infrared touch screen 100, which includes a display panel 10, a receiving table 20, an infrared frame 30, a filter bar 40, and an infrared light bar 50; the display panel 10 Located above the receiving platform 20; the filter strip 40 is installed on the infrared frame 30, and the filter strip 40 cooperates with the infrared frame 30 to form a closed cavity Q; the infrared light strip 50 is installed in In the enclosed cavity Q, the light path of the infrared light bar 50 passes through the filter bar 40 and is parallel to the upper surface of the display panel 10; the filter bar 40, the infrared frame 30 and the receiving platform 20 are common A water outlet channel P is formed.

Wherein, the bottom of the filter strip 40, the side of the infrared frame 30 close to the receiving table 20 and the side of the receiving table 20 close to the infrared frame 30 jointly form a water outlet channel P; and, the bottom surface of the filter strip 40 and A gap is formed between the upper surface of the display panel 10, and the gap is connected to the water outlet channel P.

It should be noted that the closed cavity Q of this embodiment is not absolutely closed. For example, a through hole can be opened on the side of the infrared frame 30 away from the filter bar 40 to achieve the above technical effects.

The upper and lower ends of the infrared light bar 50 described in this embodiment are respectively clamped in the enclosed cavity Q. The infrared light bar 50 includes an infrared emitting tube and an infrared receiving tube. The upper two sides of the display panel 10 are symmetrically provided with a filter strip 40 and an infrared frame 30, and the filter strip 40 and the infrared frame are located on the same side. 30 are all matched to form a closed cavity Q, and the infrared emitting tube and the infrared receiving tube are respectively installed in the closed cavity Q on both sides of the display panel 10.

Specifically, the upper end of the receiving platform 20 of this embodiment is provided with a receiving portion 21 for mounting and fixing the display panel 10; the infrared frame 30 has an opening at the upper end on the side close to the display panel 10, and the top of the infrared frame 30 is close to the display panel One end of 10 is provided with a first slot 31, the infrared frame 30 is provided with a second slot 32 on the side close to the display panel 10, and the upper and lower ends of the filter bar 40 are respectively provided with a first insert 41 and a second insert. The insert block 42, the first insert block 41 and the second insert block 42 are respectively inserted into the first slot 31 and the second slot 32, so that the filter strip 40 is fixed on the infrared frame 30, and the filter strip 40 covers On the opening of the infrared frame 30. In addition, the upper and lower ends of the enclosed cavity Q are respectively provided with clamping slots, the upper and lower ends of the infrared light bar 50 are respectively provided with clamping blocks, and the clamping blocks at the upper and lower ends of the infrared light bar 50 are respectively clamped Connected and fixed in the card slots at the upper and lower ends of the enclosed cavity Q.

In this embodiment, the upper and lower ends of the filter strip 40 are respectively clamped on the infrared frame 30. The filter strip 40 and the infrared frame 30 form a closed cavity Q to protect the infrared light strip 50, and also filter Ambient light reduces the effect of ambient light on the infrared light bar 50.

Compared with the prior art, in the infrared touch screen described in this application, the infrared light bar is installed in a closed cavity formed by the filter bar and the infrared frame, and is formed by the filter bar, the infrared frame and the receiving platform. A water outlet channel, so that the moisture on the surface of the display panel will penetrate into the gap formed between the filter strip and the display panel, and flow out of the outside along the water outlet channel, without immersing into the enclosed cavity and affecting the performance of the infrared light bar; Further, the filter bar is arranged above the side of the display panel, reducing the structural thickness of the infrared touch screen, thereby reducing the height between the light path of the infrared light bar and the display panel, and achieving the effect of reducing the touch height.

Example 2

As shown in FIGS. 3 and 4, this embodiment provides a display device 200, which includes the infrared touch screen 100 provided in Embodiment 1 of the present application, and further includes a backlight module 60 and an optical film set 70. The backlight module 60 Is arranged at the bottom of the display panel 10, the optical film set 70 is arranged between the display panel 10 and the backlight module 60; in addition, the optical film set 70 is fixed at the bottom of the display panel 10 by a middle frame 80. On the backlight module 60, a reflective layer 90 is provided between the optical film set 70 and the backlight module 60.

The middle frame 80 described in this embodiment plays a role of fixing the optical film set 70, thereby preventing the deformation of the optical film set 70 and ensuring the normal display of the image quality of the backlight module 60; the reflective layer 90 plays a role of reflecting light , Used to reflect light out, the optical film set 70 plays a role in enhancing brightness and adjusting brightness uniformity.

Compared with the prior art, the display device of the present application solves the problem of poor waterproofness of the display device frame in the prior art while reducing the height of infrared touch control. Compared with the prior art, the display device does not increase the manufacturing cost of the product. At the same time, the quality of the product is significantly improved and the reliability of the product is guaranteed.

The above-mentioned embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the infrared touch screen of the utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all fall within the protection scope of this application.

Claims

An infrared touch screen, which includes a display panel, a receiving platform, an infrared frame, a filter bar, and an infrared light bar; the display panel is located above the receiving platform; the filter bar is installed on the infrared frame And the filter bar cooperates with the infrared frame to form a closed cavity; the infrared light bar is installed in the closed cavity, and the light path of the infrared light bar passes through the filter bar and is parallel to the display The upper surface of the panel; the filter strip, the infrared frame and the receiving platform jointly form a water outlet channel.
The infrared touch screen according to claim 1, wherein: the bottom surface of the filter strip, the side of the infrared frame close to the receiving platform, and the side of the receiving platform close to the infrared frame jointly form a water outlet channel.
The infrared touch screen of claim 1, wherein a gap is formed between the bottom surface of the filter strip and the upper surface of the display panel, and the gap is connected to the water outlet channel.
The infrared touch screen according to claim 1, wherein: the upper and lower ends of the filter bar are respectively clamped on the infrared frame.
The infrared touch screen according to claim 1, wherein: the upper and lower ends of the infrared light bar are respectively clamped in the enclosed cavity.
The infrared touch screen according to claim 1, wherein: the infrared light bar includes an infrared emitting tube and an infrared receiving tube, and the upper two sides of the display panel are symmetrically provided with a filter strip and an infrared frame, which are located on the same side Both the filter strip and the infrared frame cooperate to form a closed cavity, and the infrared emitting tube and the infrared receiving tube are respectively installed in the closed cavity on both sides of the display panel.
A display device, which comprises the infrared touch screen according to any one of claims 1-6.
The display device according to claim 7, further comprising a backlight module and an optical film set, the backlight module is arranged at the bottom of the display panel, and the optical film set is arranged on the display panel and the optical film set. Between backlight modules.
8. The display device according to claim 8, wherein the optical film set is fixed on the backlight module by a middle frame, and a reflective layer is provided between the optical film set and the backlight module.