TWM630703U - Self-illuminated touch panel electronic paper display device - Google Patents

Abstract

A self-illuminated touch-sensitive electronic paper display device, which comprises an electronic paper display module; a lighting module is arranged in front of the electronic paper display module, and the electronic paper display module is formed by UV curing solid optical adhesive. The lighting module is attached to the lighting module, and the lighting module includes: at least one light bar; a light guide plate with one side adjacent to the light bar, the surface of the light guide plate is provided with a hardened layer; a touch sensing unit located in the lighting module The front of the group; and a surface cover plate, located in front of the touch sensing unit, a surface of the surface cover plate is provided with UV reflective coating, and the peripheral edge area of the bottom surface is provided with opaque or low light transmission Decorative border formed of high-rate materials.

Description

Self-illuminated touch-sensitive electronic paper display device

This creation involves the technical fields of electronic paper displays, touch sensors and lighting modules.

E-Paper Display, which has developed rapidly in recent years, has the characteristics of analog paper such as flexibility, wide viewing angle, light weight, high resolution, high contrast, indoor and outdoor readability, and low power consumption. Therefore, it has been widely used in combination with electronic devices. At present, some application solutions are to set a touch sensor (Touch panel) on the electronic paper display as an input device, so that users can use the touch sensor to communicate with the electronic paper. The image screen of the display is interactively operated, which further expands the convenience of the e-paper display. Compared with traditional CRT or LCD display screens, the e-paper display uses ambient light as the light source, so the burden on eyesight is less. , which can reduce the damage to the eyes caused by long-term viewing. However, if the electronic paper display is used in applications with insufficient ambient light, such as indoor space, the display quality will be greatly affected. Therefore, most electronic paper displays will be equipped with a front light module to supplement the lighting to supplement the light intensity and maintain the display. Quality; the front light module is designed with a light source and a light guide plate. The material of the light guide plate is mostly PC and PMMA. Such materials are prone to outgassing after being degraded by the external environment. The formation of outgassing not only causes appearance defects , will also seriously affect the light guide efficiency. Furthermore, the current full lamination method of the electronic paper display and the front light module mainly uses solid optical adhesive (OCA) or liquid optical adhesive (OCR) as the adhesive medium for lamination, which is difficult to rework the process and will reduce damage. Product yield, and the high unit price of electronic paper displays, the inability to rework will also cause significant cost pressure. In addition, the e-paper display itself is not resistant to ultraviolet (UV) rays. If it needs to be used outdoors, the strong UV in the outdoor environment will easily cause damage to the e-paper display. Therefore, when using the e-paper display outdoors, it is necessary to pay attention to anti-UV protection.

In view of the lack of traditional electronic paper display applications, the main purpose of this creation is to provide a self-illuminated touch electronic paper display device, so that the electronic paper display has touch input performance so that users can interact with the display screen of the electronic paper display. interactive, and can provide auxiliary lighting for the electronic paper display, which is convenient for use without external light sources.

Another objective of the present invention is to provide a self-illuminated touch-sensitive electronic paper display device, in which the surface of the light guide plate of the lighting module is provided with a hard coat layer to avoid deterioration caused by outgassing of the light guide plate.

Another objective of the present invention is to provide a self-illuminated touch-sensitive electronic paper display device, which has an anti-UV protection mechanism, so that the electronic paper display can be used outdoors without damage.

Another object of the present invention is to provide a self-illuminated touch electronic paper display device, the lamination of the electronic paper display and the front light module can be reworked, which can improve product yield and reduce cost pressure.

In order to achieve the above-mentioned purpose, the self-illuminated touch-sensitive electronic paper display device provided by this creation includes an electronic paper display module; The optical adhesive attaches the electronic paper display module to the lighting module, and the lighting module comprises: at least one light bar; a light guide plate, one side of which is adjacent to the light bar; and a touch sensing unit located on the side of the lighting module front; and a surface cover plate, located in front of the touch sensing unit, a surface of the surface cover plate is provided with a UV reflective coating, and the peripheral edge area of the bottom surface is provided with a material made of opaque or low light transmittance Formed decorative border.

Wherein, the material of the light guide plate includes polycarbonate (PC), polymethyl methacrylate (PMMA), polyester (PET); it also includes a hardened layer on the surface of the light guide plate, wherein the hardened layer directly It is formed on the surface of the light guide plate, or the hardened layer is formed on a film, and the film is attached to the surface of the light guide plate.

Wherein, the light bar includes: a diffusion bar with a plurality of diffusion points; a reflector for covering the diffusion bar; and at least one light source located on the side of the diffusion bar.

Wherein, the touch sensing unit is selected from capacitive touch sensors, resistive touch sensors, electromagnetic touch sensors, sonic touch sensors, vibration-wave touch sensors, optical touch sensors or combinations thereof.

Wherein, the material of the surface cover includes glass, polymethyl methacrylate (PMMA), polycarbonate (PC), polyester (PET), cycloolefin copolymer (COC), cycloolefin polymer (COP) or a combination of the above.

This will further clarify other functions and technical features of the present creation in the following, and those skilled in the art can implement the present creation accordingly after reading the descriptions in the text.

1 to 3 show a preferred embodiment of the self-illuminated touch-sensitive electronic paper display device, which includes an electronic paper display module 10 , a lighting module 20 , a touch sensing unit 30 and a surface cover plate 40.

The electronic paper display module 10 is a reflective display with low power consumption and flexibility, and uses electrophoretic technology or cholesteric liquid crystal technology to present image signals as image frames on the display surface of the electronic paper display module 10 .

As shown in FIGS. 2 to 3 , the lighting module 20 includes: two light bars 21 and a light guide plate 25 ; wherein, the light bar 21 includes a diffusion bar 211 , a reflector 212 and two point light sources 213 . The diffusion bar 211 is made by arranging a plurality of astigmatism points 211a in a long transparent base material, and is used for converting the incident light from the point light source 213 into uniform light. The astigmatic points 211a can be made of materials with a higher refractive index than the elongated transparent substrate, and can also be holes concave on the surface or convex points protruding from the surface; Dense distribution, so that the brightness of the light on the diffusion strip 211 is evenly distributed. The reflecting plate 212 is used to cover the top surface and the long side of the diffusion bar 211, so as to reflect the light from the covered portion back into the diffusion bar 211, so as to reduce the dissipation loss of the light. The point light sources 213 are LEDs and are arranged on the side surfaces of the diffusion bars 211 .

The light guide plate 25 is adjacent to the diffuser bar 211 at one side to receive the light source of the light bar 21 and convert the light source of the light bar 21 into a surface light source which is emitted downward. The area of the light guide plate 25 is consistent with the visible area of the electronic paper display module 10 , so as to provide good light illumination for the visible area of the electronic paper display module 10 . The material of the light guide plate 25 is selected from PC, PMMA, and PET substrates, but the types used are not limited to the aforementioned materials. Preferably, the light guide plate 25 is also provided with a structure of astigmatism points 211a on the diffuser strips, so that the brightness of the light on the light guide plate 25 can be uniformly distributed. In addition, the surface of the light guide plate 25 is also provided with a hardened layer HC, and the hardened layer HC is used to reduce the outgassing rate of the plastic substrate, so as to avoid the deterioration of the light guide plate 25 caused by outgassing. , but the hardened layer HC is directly formed on the surface of the light guide plate 25, for example, by spraying, sputtering the hardened layer on the surface of the plastic substrate of the light guide plate 25, or using chemicals to soak the plastic substrate and then drying and hardening. A film with a hardened layer HC on the surface of the light guide plate 25 may be pasted, for example, a hardened layer HC is provided on a PET film, and the PET film is pasted on the surface of the light guide plate 25 . In addition to the means of providing a hardened layer HC on the surface of the light guide plate 25, a material that can absorb outgassing can also be added to the material of the OCA or OCR optical adhesive used for lamination to eliminate the deterioration of the light guide plate 25. generated outgassing.

The lighting module 20 is disposed in front of the electronic paper display module 10 , and the two are bonded together by UV-curable solid optical adhesive 18 . The UV-curable solid optical adhesive 18 is used as the bonding medium between the lighting module 20 and the electronic paper display module, which has low adhesion before the UV-curable solid optical adhesive 18 is cured, so that the bonding operation can be confirmed at the end The previous state can be easily reworked, which can improve the product yield and greatly reduce the cost loss of lamination process failure.

The touch sensing unit 30 is located in front of the lighting module 20 , and the two are bonded together using optical glue 28 . In this embodiment, the touch sensing unit 30 is a capacitive touch sensor, which includes an X-axis sensing layer 31 , a Y-axis sensing layer 32 and an insulating layer 33 , and the insulating layer 33 is disposed on the X-axis sensing layer, Between the Y-axis sensing layers, the two sensing layers are arranged in an insulating manner, and the X-axis sensing layer and the Y-axis sensing layer are grounded respectively and connected to a control circuit (not shown in the figure); the touch active area of the touch sensing unit 30 It has an area specification corresponding to the visual area of the electronic paper display module 10, so that it can be used with the image screen displayed by the electronic paper display module 10 as a touch input device, so that the user can touch the electronic paper display module through the touch sensing unit 30. 10 provides an interactive operation on the provided image screen to form a friendly computer-interactive user interface. In addition to the capacitive touch sensor, the touch sensing unit 30 can also use a resistive touch sensor, an electromagnetic touch sensor, a sound wave touch sensor, a vibration wave touch sensor, an optical touch sensor or the above two touch sensors. One or more combinations, but the scope of implementation is not limited to the aforementioned types.

The surface cover 40 is disposed in front of the touch sensing unit 30 , and the two are bonded together by optical glue 38 . . The surface cover plate 40 is a high light transmittance sheet with excellent mechanical strength, and its material is selected from various glass, polymethyl methacrylate (PMMA), polycarbonate (PC), polyester (PET), Cyclic olefin copolymer (COC) or cyclic olefin polymer (COP), etc., but the scope of implementation is not limited to the aforementioned materials. A UV reflective coating 41 is provided on the upper surface of the surface cover 40 , and the UV reflective coating 41 is used to reflect and isolate UV wavelength light, so as to prevent UV light from entering and causing damage to the electronic paper display module 10 . In addition to the means of providing the UV reflective coating 41 on the upper surface of the surface cover 40, a UV wavelength absorbing material can also be added to the materials of the optical adhesives 28 and 38 for lamination, so as to block UV light from entering the display mold of the detrimental electronic paper. Service life of group 10.

In addition, a decorative frame 42 is provided on the peripheral edge area of the bottom surface of the surface cover 4, and the decorative frame 42 is made of a non-conductive material and is made of an opaque or low-transmittance film layer. The non-conductive material can be Materials such as ink or photoresist are selected, but the range of materials that can be implemented is not limited to this; the aforementioned non-conductive materials can be applied to the bottom surface of the surface cover 4 by technical means such as printing, sputtering, coating, etc. A thin film layer with a thickness of 15 μm or more is formed at the peripheral portion. The decorative frame 42 of the surface cover 4 is located below the touch sensing unit 30 , the peripheral circuit area of the electronic paper display module 10 , and the light bar 21 on the edge of the lighting module 20 to enhance the aesthetics of the overall device.

Although the present invention has been fully described with reference to the accompanying drawings and specific embodiments, it should be understood that the foregoing embodiments are only examples of implementation for further description, and the embodiments of the present invention are not limited to the description, and those skilled in the art will understand that Various changes and modifications, and such changes and modifications should be construed as being included within the scope of this creation as defined by the scope of the appended claims.

10: Electronic paper display module 18: UV curing solid optical adhesive 20: Lighting module 21: Light bar 211: Diffusion Strip 211a: Astigmatism 212: Reflector 213: Point Light 25: light guide plate 28, 38: Optical glue 30: Touch Sensing Unit 31: X-axis sensing layer 32: Y-axis sensing layer 33: Insulation layer 40: Surface cover 41: UV reflective coating 42: Decorative Border HC: hardened layer

Figure 1 is a schematic diagram/plan view of the composition of the components of this creation. FIG. 2 is a schematic side cross-sectional view of the laminated composite structure along the section line II-II of FIG. 1 . FIG. 3 is a schematic perspective view of the structure of the lighting module of the present invention.

10: Electronic paper display module

18: UV curing solid optical adhesive

20: Lighting module

21: Light bar

211: Diffusion Strip

212: Reflector

25: light guide plate

28, 38: Optical glue

30: Touch Sensing Unit

31: X-axis sensing layer

32: Y-axis sensing layer

33: Insulation layer

40: Surface cover

41: UV reflective coating

42: Decorative Border

HC: hardened layer

Claims (8)

A self-illuminated touch electronic paper display device, comprising: an electronic paper display module; A lighting module is arranged in front of the electronic paper display module, and the electronic paper display module is attached to the lighting module by using UV-curable solid-state optical adhesive, and the lighting module includes: at least one light bar; a guide a light plate adjacent to the light bar on one side; a touch sensing unit located in front of the lighting module; and A surface cover plate, located in front of the touch sensing unit, a surface of the surface cover plate is provided with a UV reflective coating, and a peripheral edge region of the bottom surface is provided with opaque or low light transmittance materials. Decorative border. The self-illuminated touch-sensitive electronic paper display device according to claim 1, wherein the light bar comprises: a diffusion bar with a plurality of diffusion points; a reflector for covering the diffusion bar; and at least one point The light source is located on the side of the diffuser. The self-illuminated touch-sensitive electronic paper display device according to claim 1, wherein the material of the light guide plate comprises polycarbonate (PC), polymethyl methacrylate (PMMA), and polyester (PET). The self-illuminated touch-sensitive electronic paper display device according to claim 3, further comprising a hardened layer provided on the surface of the light guide plate. The self-illuminated touch-sensitive electronic paper display device according to claim 4, wherein the hardened layer is directly formed on the surface of the light guide plate. The self-illuminated touch-sensitive electronic paper display device according to claim 4, wherein the hardened layer is formed on a film, and the film is attached to the surface of the light guide plate. The self-illuminated touch electronic paper display device according to claim 1, wherein the touch sensing unit is selected from capacitive touch sensors, resistive touch sensors, electromagnetic touch sensors, and sonic touch sensors , vibration wave touch sensor, optical touch sensor or a combination of the above. The self-illuminated touch-sensitive electronic paper display device according to claim 1, wherein the material of the surface cover comprises glass, polymethyl methacrylate (PMMA), polycarbonate (PC), polyester (PET) ), cycloolefin copolymer (COC), cycloolefin polymer (COP), or a combination of the above.

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