TFTs (Thin Film Transistor) device with strong UV resistance
A UV-proof TFT device with a UV-blocking layer and naturally curing adhesive addresses UV-induced touch screen failure, enhancing durability and bonding stability.
Patent Information
- Application Number
- CN202421231548.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-31
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-31
AI Technical Summary
Existing TFT devices with touch screens are vulnerable to UV damage due to the use of indium tin oxide, which is not protected by current UV-blocking technologies, leading to touch failure and reduced product lifespan.
Incorporating a UV-proof layer between the touch screen and liquid crystal panel, combined with a naturally curing OCA optical adhesive layer, to block UV radiation and ensure stable bonding.
The UV-proof TFT device effectively protects the touch screen from UV damage, extending its lifespan and ensuring stable adhesion, while maintaining functionality under strong UV exposure.
Smart Images
Figure CN222259778U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of liquid crystal display screens, in particular to a TFT device with strong UV protection. Background Art
[0002] The existing liquid crystal display screen is mainly composed of TFT, where TFT is the abbreviation of "thin film transistor". With the development of electronic products, all electronic products have touch screen response, so TP (Touch Pad, touch screen) will be set on TFT to realize touch screen operation.
[0003] At present, many TFT with TP products are used outdoors in direct sunlight, and the ITO (indiumtin oxides) material on the TP touch screen is an N-type oxide semiconductor - indium tin oxide, which is easily damaged by UV light, causing touch failure. However, the existing technology only sets an optical OCA (Optically Clear Adhesive) layer between the TP touch screen and the circuit printed board. The optical OCA layer is only used to bond the touch screen and cannot block the UV entering the TP touch screen. Utility Model Content
[0004] The utility model aims to avoid the shortcomings of the prior art and provide a strong UV protection TFT device. The touch screen of the strong UV protection TFT device has the advantage of being able to resist strong UV light.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] supply.
[0007] The utility model has the following beneficial effects of a strong UV protection TFT device:
[0008] The highly UV-proof TFT device of the utility model can effectively protect the touch screen by arranging a UV-proof layer for isolating UV between the touch screen and the liquid crystal panel layer, so that the ITO material touch screen will not be damaged even under strong UV irradiation outdoors, effectively extending the service life of the electronic product. In addition, considering that the UV-proof layer will affect the curing of the OCA optical glue after isolating UV, the OCA optical glue is set as a naturally curing layer, so that the OCA optical glue can be cured better, ensuring that the touch screen can be stably bonded. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 The cross-section of the highly UV-resistant TFT device according to the specific implementation mode of the utility model is coated.
[0010] Figure 2It is a test chart of the UV transmittance after using the UV protection layer according to a specific embodiment of the utility model.
[0011] Reference numerals:
[0012] 1. LCD panel; 2. UV protection layer; 3. Touch screen; 4. OCA optical adhesive layer; 5. Printed circuit board. DETAILED DESCRIPTION
[0013] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.
[0014] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.
[0015] It should be understood that although the terms "first", "second", "third", etc. may be used to describe various information in the present invention, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.
[0016] Example 1
[0017] The highly UV-resistant TFT device disclosed in this embodiment includes:
[0018] A liquid crystal panel 1, a touch screen 3 provided on one side of the liquid crystal panel 1, wherein the touch screen 3 is an indium tin oxide touch screen 3,
[0019] The electronic product of the liquid crystal panel 1 is referred to as a TFT product. A touch layer is set on one side of the liquid crystal panel 1. The touch layer can be controlled by clicking on the liquid crystal panel 1 to achieve touch screen clicking.
[0020] One side of the touch screen 3 is close to the liquid crystal panel 1 , and the other side is provided with a circuit printed board 5 . The circuit printed board 5 is controlled by conduction in the touch layer, thereby controlling the electronic product.
[0021] An anti-UV layer 2 is provided between the liquid crystal panel 1 and the touch screen 3, and an OCA optical adhesive layer 4 is provided between the touch screen 3 and the circuit printed board 5.
[0022] The anti-UV layer 2 isolates UV light, and is used to prevent UV light from entering the liquid crystal panel 1 and damaging the touch screen 3, causing the touch screen 3 to fail. Since the anti-UV layer 2 blocks UV light, if the UV light-cured OCA optical adhesive layer 4 is used, the OCA optical adhesive layer 4 cannot be effectively cured to bond the touch screen 3. In this regard, the anti-UV layer 2 is a light-cured layer, and the OCA optical adhesive layer 4 is a naturally cured layer.
[0023] By setting a UV-isolating anti-UV layer 2 between the touch screen 3 and the liquid crystal panel 1 layer, the touch screen 3 can be effectively protected, so that the ITO material touch screen 3 will not be damaged even under strong UV radiation outdoors, effectively extending the service life of the electronic product. In addition, considering that the UV-isolating anti-UV layer 2 will affect the curing of the OCA optical glue after blocking UV, the OCA optical glue is set as a naturally curing layer, so that the OCA optical glue can be better cured, ensuring that the touch screen 3 can be stably bonded.
[0024] In this embodiment, the anti-UV layer 2 is a light-curing OCA adhesive layer. Since the anti-UV layer 2 is directly irradiated by UV light, setting the anti-UV layer 2 as a light-curing OCA layer can better promote the curing of the anti-UV layer 2, and the OCA adhesive layer enables the liquid crystal panel 1 to be stably bonded to the touch screen 3.
[0025] In this embodiment, the light-cured OCA adhesive layer is a G6610 OCA adhesive layer. This type of OCA adhesive layer can be cured well under the influence of light. G6610 OCA adhesive is a commercially available OCA optical adhesive, such as the G6610 OCA optical adhesive launched by Gaoren New Materials.
[0026] In this embodiment, the model of the OCA optical adhesive layer 4 is Mitsubishi OCA adhesive layer. Mitsubishi OCA adhesive layer is a naturally cured OCA adhesive layer, and Mitsubishi OCA adhesive layer is a commercially available OCA adhesive layer.
[0027] In this embodiment, the thickness of the UV protection layer 2 is 0.2-0.25 mm.
[0028] In this embodiment, the thickness of the OCA optical adhesive layer 4 is 0.2-0.25 mm.
[0029] Providing the UV protection layer 2 and the OCA adhesive layer with the above thickness can effectively achieve the corresponding functions without causing the adhesive layer to be too thick.
[0030] In actual use, the UV protection layer 2 and the OCA optical adhesive layer 4 are coated on both sides of the touch screen 3 respectively, and by pressing, the two sides of the touch screen 3 are respectively bonded to the liquid crystal panel 1 and the printed circuit board.
[0031] To illustrate the effect of the UV light transmittance after the UV protection layer is set in the present invention, the UV light transmittance of the touch screen with the UV protection layer is verified. Figure 2 It can be seen that after setting the anti-UV layer (G6610 model), the touch screen can block light with a wavelength of 340 to 400 nm, that is, it can effectively block UV light with a wavelength of 10--400 nm.
[0032] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0033] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0034] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0035] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.
[0036] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A highly UV-resistant TFT device, characterized in that: include A liquid crystal panel (1), a touch screen (3) arranged on one side of the liquid crystal panel (1), the touch screen (3) being an indium tin oxide touch screen (3), one side of the touch screen (3) being close to the liquid crystal panel (1), and the other side being provided with a circuit printed board (5), An anti-UV layer (2) is provided between the liquid crystal panel (1) and the touch screen (3), and an OCA optical adhesive layer (4) is provided between the touch screen (3) and the circuit printed board (5). Wherein, the UV protection layer (2) is a light-cured layer, and the OCA optical adhesive layer (4) is a naturally-cured layer.
2. The strong UV protection TFT device according to claim 1, characterized in that: The UV protection layer (2) is a light-cured OCA adhesive layer.
3. The strong UV protection TFT device according to claim 2, characterized in that: The model of the light-cured OCA adhesive layer is G6610 OCA adhesive layer.
4. The strong UV protection TFT device according to claim 1, characterized in that: The model of the OCA optical adhesive layer (4) is Mitsubishi OCA adhesive layer.
5. The strong UV protection TFT device according to claim 1, characterized in that: The thickness of the UV protection layer (2) is 0.2-0.25 mm.
6. The strong UV protection TFT device according to claim 5, characterized in that: The thickness of the OCA optical adhesive layer (4) is 0.2-0.25 mm.