TWI831658B - Writing display apparatus - Google Patents

Abstract

A writing display apparatus including a display panel and a stylus is provided. The display panel includes a transparent substrate and a plurality of first microstructures. The transparent substrate has a substrate surface. The first microstructures are disposed on the substrate surface. The stylus is adaptive to write on the substrate surface of the display panel. A nib surface of the stylus is provided with a plurality of second microstructures. The first microstructures are adaptive to extend into the second microstructures, or the second microstructures are adaptive to extend into the first microstructures.

Description

writing display device

The present invention relates to a display device, and in particular to a writing display device.

In addition to being able to touch with fingers, current touch display technology can also use a stylus to touch and write on the display panel. Due to the popularization of smart life, people are increasingly relying on touch display devices. In addition to functional requirements, the touch writing experience of products such as smartphones, e-books, or handwriting tablets is also becoming more and more stringent. In order to improve the writing feel, most current touch display devices form a relatively rough coating layer on the writing surface of the display panel. Among them, although a coating layer containing anti-glare particles can increase the roughness of the writing surface, it also causes the display screen of the display panel to easily cause sparkling as the viewing angle changes. Although another kind of coating layer does not contain anti-glare particles, the concave and convex structure formed by it is prone to white fog when illuminated by light. In other words, the current technical solutions cannot take into account the writing feel and display quality of the touch display device.

The present invention provides a writing display device that can take into account the writing feel of a stylus and the display quality of a display panel.

The writing display device of the present invention includes a display panel and a stylus. The display panel includes a light-transmitting substrate and a plurality of first microstructures. The light-transmissive substrate has a substrate surface. A plurality of first microstructures are disposed on the surface of the substrate. The stylus is suitable for writing on the substrate surface of the display panel. The pen tip surface of the stylus is provided with a plurality of second microstructures. The plurality of first microstructures is adapted to extend into the plurality of second microstructures, or the plurality of second microstructures is adapted to extend into the plurality of first microstructures.

In an embodiment of the present invention, the plurality of first microstructures of the above-mentioned display device are arranged at first pitch intervals along the first direction. The plurality of second microstructures are arranged at second pitch intervals along the first direction.

In an embodiment of the present invention, the first pitch of the above-mentioned display device is equal to the second pitch.

In an embodiment of the present invention, the pen tip of the above-mentioned display device is a ball, and a plurality of second microstructures are disposed on the surface of the ball.

In an embodiment of the present invention, each first microstructure of the above-mentioned display device is one of a recessed structure and a convex structure, and each second microstructure is the other one of a recessed structure and a convex structure.

In an embodiment of the present invention, one of the substrate surface and the pen tip surface of the above-mentioned display device has an opening defining a recessed structure. The raised structure has a bottom surface. The bottom surface of the raised structure connects the other of the substrate surface and the pen tip surface. The ratio of the bottom surface width of the protruding structure along the first direction to the opening width of the opening along the first direction is greater than or equal to 1 and less than or equal to 1.9.

In an embodiment of the present invention, the recessed structure of the above-mentioned display device has a side wall connecting one of the substrate surface and the pen tip surface. The angle between the side wall and one of the substrate surface and the pen tip surface is less than or equal to 90 degrees.

In one embodiment of the present invention, the protruding structure of the above-mentioned display device has a side wall connecting one of the substrate surface and the pen tip surface. The angle between the side wall and one of the substrate surface and the pen tip surface is greater than 90 degrees and less than 180 degrees.

In one embodiment of the present invention, the convex structure of the above-mentioned display device is adapted to extend into the recessed structure and form an airtight space, and the air pressure of the airtight space is less than 1 atm and greater than or equal to 0.1 atm.

In an embodiment of the present invention, the Young's modulus of the convex structure of the above-mentioned display device is smaller than the Young's modulus of the recessed structure.

In an embodiment of the present invention, the material of the plurality of first microstructures or the plurality of second microstructures of the display device includes conductive resin, silicone, or conductive fiber.

Based on the above, in the writing display device according to an embodiment of the present invention, in order to improve the writing strokes of the stylus on the substrate surface of the display panel (i.e., the writing feeling), a plurality of first micro-micrographs are provided on the substrate surface of the display panel. structure, and the tip surface of the stylus is provided with a plurality of second microstructures. Through the cooperative relationship between these first microstructures and these second microstructures, the white fog phenomenon and flicker problems caused by the rough coating layer used on the display surface of the current writing display device can also be avoided, thereby ensuring the display quality of the writing display device. .

Reference will now be made in detail to the exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numbers are used in the drawings and descriptions to refer to the same or similar parts.

Figure 1 is a schematic cross-sectional view of a writing display device according to a first embodiment of the present invention. FIG. 2 is a partially enlarged schematic diagram of the stylus pen in FIG. 1 . 3A and 3B are partial enlarged cross-sectional views of the stylus pen in FIG. 1 when writing on the substrate surface of the display panel. 4A and 4B are partial enlarged cross-sectional views of a stylus pen writing on a substrate surface of a display panel according to other modified embodiments of the present invention. FIG. 5A is a schematic top view of the substrate surface of the display panel of FIG. 1 . 5B to 5D are schematic top views of the substrate surface of the display panel according to other modified embodiments of the present invention.

Please refer to FIG. 1 , the writing display device 10 includes a display panel 100 and a stylus 200 . In this embodiment, the display panel 100 includes a substrate 101, a light-transmitting substrate 102 and a display medium layer. The display medium layer can be divided into a plurality of display pixels PX and is disposed between the substrate 101 and the light-transmitting substrate 102 .

For example, in this embodiment, the display medium layer may be a liquid crystal layer, and two electrically independent electrode layers (not shown) may be provided on at least one of the substrate 101 and the light-transmitting substrate 102, and the The electric field formed between the two electrode layers is used to drive the liquid crystal layer. That is, the display panel 100 is, for example, a liquid crystal display panel. Since the liquid crystal display panel is a non-self-luminous display panel, the writing display device 10 can also be equipped with a backlight (not shown) to provide illumination light required for display, or rely on external ambient light for display (such as a reflective liquid crystal display panel). ).

However, the present invention is not limited to this. In other modified embodiments, the display panel 100 may also be a self-luminous display panel. For example, the display medium layer can be a plurality of organic light emitting diodes (organic light emitting diodes), micro light emitting diodes (micro light emitting diodes) or sub-millimeter light emitting diodes (mini light emitting diodes), but not Limited to this. The substrate 101 may be a circuit backplane, and is suitable for independently controlling the plurality of light-emitting diodes to emit light.

Please refer to FIG. 1, FIG. 2 and FIG. 3A at the same time. The light-transmitting substrate 102 has a substrate surface 102s. A microstructure layer 120 composed of a plurality of first microstructures MS1 is provided on the substrate surface 102s. The stylus 200 is suitable for Writing is done on the substrate surface 102s of the display panel 100. More specifically, the stylus 200 can touch or write via capacitive coupling or electromagnetic induction between the pen tip 210 and the touch layer (not shown) of the display panel 100 . In this embodiment, the pen tip 210 is, for example, a ball (or ball), and is disposed in the limiting groove 205r of the fixing member 205 . When the stylus pen 200 writes on the substrate surface 102s of the display panel 100, the ball serving as the pen tip 210 will roll in the limiting groove 205r of the fixing member 205.

It is particularly noted that the tip surface 210s of the stylus pen 200 is provided with a plurality of second microstructures MS2 matching the plurality of first microstructures MS1. That is, these second microstructures MS2 are provided on the surface of the ball. The described cooperation relationship is, for example, that the plurality of second microstructures MS2 on the tip 210 of the stylus pen 200 are adapted to extend into the plurality of first microstructures MS1 on the light-transmissive substrate 102 of the display panel 100, but this is not considered to be the case. limit. In another not-shown embodiment, the plurality of first microstructures on the light-transmissive substrate of the display panel are adapted to extend into the plurality of second microstructures on the tip of the stylus pen.

For example, in this embodiment, the plurality of first microstructures MS1 may be a plurality of recessed structures RS recessed from the substrate surface 102s, and the plurality of second microstructures MS2 may be a plurality of recessed structures RS protruding from the pen tip surface 210s. Protruding structure PS, but not limited to this. In another embodiment not shown, the plurality of first microstructures may also be a plurality of convex structures protruding from the surface of the substrate, and the plurality of second microstructures may be a plurality of recessed structures recessed from the surface of the pen tip. .

It should be noted that in this embodiment, the microstructure layer 120 can be made from a part of the light-transmitting substrate 102 . That is, the microstructure layer 120 and the light-transmitting substrate 102 are integrated. However, the present invention is not limited to this. According to other not-shown embodiments, the material of the microstructure layer (ie, the plurality of first microstructures) may be selectively different from the material of the light-transmissive substrate. That is, the microstructure layer may be made of a material layer additionally formed on the light-transmissive substrate.

In this embodiment, a plurality of first microstructures MS1 are arranged at intervals with a first pitch P1 along a first direction (for example, the horizontal direction of FIG. 3A ), and a plurality of second microstructures MS2 are arranged at intervals along the first direction. The second pitch P2 is arranged at intervals. Preferably, the first pitch P1 may be equal to the second pitch P2 to maximize the friction force felt by the tip 210 of the stylus pen 200 when writing on the substrate surface 102s. That is, during the writing process, in the contact area between the substrate surface 102s and the pen tip surface 210s, the amount of the second microstructure MS2 protruding into the first microstructure MS1 can be maximized, but is not limited thereto. In other embodiments not shown, the relationship between the arrangement pitch of the plurality of first microstructures and the arrangement pitch of the plurality of second microstructures can be adjusted according to actual writing feel requirements.

It should be understood that, in order to allow the second microstructure MS2 (ie, the protruding structure PS) of this embodiment to extend into the first microstructure MS1 (ie, the recessed structure RS), the portion of the second microstructure MS2 facing the substrate surface 102s The orthographic projection area of the top surface PSt on the substrate surface 102s is smaller than the opening area of the opening OP defining the recessed structure RS on the substrate surface 102s. Specifically, the width of the top surface PSt of the second microstructure MS2 along any direction parallel to the pen tip surface 210s (such as the horizontal direction of FIG. 3A ) (such as the top surface width Wt of FIG. 3A ) is smaller than that of the first microstructure MS1 The width of the opening OP (eg, the opening width Wo in FIG. 3A ) along any direction (eg, the horizontal direction in FIG. 3A ) of the substrate surface 102 s.

On the other hand, the second microstructure MS2 has a bottom surface PSb connected to the pen tip surface 210s. In order to control the extent to which the second microstructure MS2 of this embodiment protrudes into the first microstructure MS1, the orthogonal projected area of the bottom surface PSb of the second microstructure MS2 on the substrate surface 102s must be equal to or larger than the opening OP of the first microstructure MS1 the opening area. Specifically, the width of the bottom surface PSb of the second microstructure MS2 along any direction parallel to the pen tip surface 210s (for example, the horizontal direction of FIG. 3A ) (for example, the bottom surface width Ws of FIG. 3A ) may be greater than or equal to the first microstructure MS1 The width of the opening OP (eg, the opening width Wo in FIG. 3A ) along any direction (eg, the horizontal direction in FIG. 3A ) of the substrate surface 102 s. For example, the ratio of the bottom width Ws of the protruding structure PS to the opening width Wo of the recessed structure RS may be greater than or equal to 1 and less than or equal to 1.9.

From another perspective, the recessed structure RS has sidewalls RSs connected to the substrate surface 102s, and the angle A1 between the sidewalls RSs and the substrate surface 102s may be less than or equal to 90 degrees. The protruding structure PS has a side wall PSs connected to the pen tip surface 210s, and the angle A2 between the side wall PSs and the pen tip surface 210s can be greater than 90 degrees and less than 180 degrees.

Please refer to FIG. 3B . In this embodiment, when the pen tip 210 of the stylus pen 200 writes on the substrate surface 102 s of the display panel 100 , the protruding structure PS on the pen tip 210 is adapted to extend into the depression on the light-transmitting substrate 102 Structure RS and form an airtight space SP. Since the protruding structure PS extends into the recessed structure RS, part of the air in the recessed structure RS will be extruded by the protruding structure PS and be discharged. That is to say, when the protruding structure PS extends into the airtight space SP formed by the recessed structure RS, its air pressure will be less than 1 atm. Preferably, the air pressure of the airtight space SP may be greater than or equal to 0.1 atm. For example, in this embodiment, the air pressure of the airtight space SP is, for example, 0.5 atm, but is not limited to this.

Through the air pressure difference between the airtight space SP and the external environment, an adsorption force can be generated between the stylus 200 and the display panel 100, thereby allowing the user to feel the friction when writing as when writing on traditional paper, which helps The writing feeling of the writing display device 10 is improved. In addition, since the writing display device 10 of the present disclosure does not use the rough coating layer used in current writing display devices to increase friction during writing, it can also avoid the common white fog phenomenon and flicker on current writing display devices. problem, thereby ensuring the display quality of the writing display device 10 .

Please refer to Figure 4A. In another modified embodiment of the writing display device 10A, the angle between the side wall PSs-A of the protruding structure PS-A (ie, the second microstructure MS2-A) on the pen tip 210 and the pen tip surface 210s A2' may be larger than the included angle A2 of the writing display device 10 of FIG. 3A. When the top surface width of the protruding structure PS-A is the same as the top surface width Wt in Figure 3A, the protruding structure PS-A in the modified embodiment extends into the recessed structure RS to a greater extent than the protruding structure in Figure 3B. The degree of protrusion of PS into the recessed structure RS is low. Therefore, the air pressure of the airtight space SP-A formed by the protruding structure PS-A and the recessed structure RS will be greater than the air pressure of the airtight space SP in FIG. 3B , for example, 0.91 atm. That is to say, the writing feeling of the stylus 200 of the writing display device 10A on the display panel will be lighter than that of the writing display device 10 of FIG. 3B .

Please refer to Figure 4B. In the writing display device 10B of another modified embodiment, the angle between the side wall PSs-B of the protruding structure PS-B (ie, the second microstructure MS2-B) on the pen tip 210 and the pen tip surface 210s A2″ may be smaller than the included angle A2 of the writing display device 10 of FIG. 3A . In the case where the top surface width of the protruding structure PS-B is the same as the top surface width Wt in FIG. 3A , the protruding structure PS-B of the modified embodiment The degree of protrusion into the recessed structure RS will be higher than the degree of protrusion of the protruding structure PS into the recessed structure RS in Figure 3B. Therefore, the air pressure of the airtight space SP-B formed by the protruding structure PS-B and the recessed structure RS will increase. The air pressure is smaller than that of the airtight space SP in Figure 3B, for example, 0.1 atm. In other words, the writing feeling of the stylus 200 of the writing display device 10B on the display panel will be heavier than that of the writing display device 10 of Figure 3B.

Please continue to refer to FIGS. 1 to 3B . The material of the second microstructure MS2 of the writing display device 10 may include conductive resin, silicone, or conductive fiber, but is not limited thereto. In another embodiment not shown, the first microstructure can also be made of conductive resin, silicone, or conductive fiber. In particular, the Young’s modulus of the protruding structure PS can preferably be smaller than the Young’s modulus of the recessed structure RS.

Referring to FIG. 3A and FIG. 5A , a plurality of first microstructures MS1 (eg, recessed structures RS) of the writing display device 10 can be arranged in an array on the light-transmitting substrate 102 . For example, these first microstructures MS1 may be arranged in multiple columns and rows along the horizontal and vertical directions of FIG. 5A, but are not limited thereto. In another variant embodiment not shown, these first microstructures may also be arranged in a honeycomb shape on the light-transmitting substrate 102 .

In this embodiment, the orthographic projection profile of these first microstructures MS1 on the light-transmitting substrate 102B (ie, the opening OP profile of the recessed structure RS) is, for example, circular, but is not limited thereto. In another modified embodiment, the orthographic projection profile of the first microstructure MS1-B on the light-transmitting substrate 102B (ie, the profile of the opening OP-B of the recessed structure RS-B) may also be a square, as shown in FIG. 5B. In yet another modified embodiment, the orthographic projection profile of the first microstructure MS1-C on the light-transmitting substrate 102C (ie, the profile of the opening OP-C of the recessed structure RS-C) may also be rectangular, as shown in FIG. 5C. In yet another modified embodiment, the plurality of first microstructures on the light-transmitting substrate 102D may also be the first microstructure MS1 of FIG. 5A , the first microstructure MS1 -B of FIG. 5B , and the first microstructure of FIG. 5C The combination of MS1-C is shown in Figure 5D.

Although not shown in the figure, in order to realize the cooperation between the first microstructure on the display panel and the second microstructure on the stylus, the arrangement of the plurality of second microstructures on the surface of the tip of the stylus and the The orthographic profile on the surface of the pen tip is also similar to the arrangement of the plurality of first microstructures on the surface of the substrate and the orthographic profile on the surface of the substrate, which will not be described again here.

To sum up, in the writing display device according to an embodiment of the present invention, in order to improve the writing strokes of the stylus on the substrate surface of the display panel (i.e., the writing feeling), a plurality of third insulators are provided on the substrate surface of the display panel. A microstructure is provided, and a plurality of second microstructures are provided on the tip surface of the stylus pen. Through the cooperative relationship between these first microstructures and these second microstructures, the white fog phenomenon and flicker problems caused by the rough coating layer used on the display surface of the current writing display device can also be avoided, thereby ensuring the display quality of the writing display device. .

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features can be equivalently replaced; and these modifications or substitutions do not deviate from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention. Scope.

10, 10A, 10B: writing display device 100:Display panel 101:Substrate 102, 102B, 102C, 102D: Translucent substrate 102s:Substrate surface 120:Microstructure layer 200:Stylus pen 205: Fixtures 205r:limit slot 210: Pen tip 210s: Pen tip surface A1, A2, A2’, A2”: included angle MS1, MS1-B, MS1-C: first microstructure MS2, MS2-A, MS2-B: Second microstructure OP, OP-B, OP-C: opening PS, PS-A, PS-B: raised structure PSb: bottom surface PSs, RSs, PSs-A, PSs-B: side wall PSt: top surface PX: display pixel P1: first pitch P2: second pitch RS, RS-B, RS-C: recessed structure SP, SP-A, SP-B: airtight space Wo: opening width Ws: Bottom width Wt: top surface width

Figure 1 is a schematic cross-sectional view of a writing display device according to a first embodiment of the present invention. FIG. 2 is a partially enlarged schematic diagram of the stylus pen in FIG. 1 . 3A and 3B are partial enlarged cross-sectional views of the stylus pen in FIG. 1 when writing on the substrate surface of the display panel. 4A and 4B are partial enlarged cross-sectional views of a stylus pen writing on a substrate surface of a display panel according to other modified embodiments of the present invention. FIG. 5A is a schematic top view of the substrate surface of the display panel of FIG. 1 . 5B to 5D are schematic top views of the substrate surface of the display panel according to other modified embodiments of the present invention.

10: Writing display device

102: Translucent substrate

102s:Substrate surface

200:Stylus pen

210: Pen tip

210s: Pen tip surface

MS1: The first microstructure

MS2: Second microstructure

PS: raised structure

RS: recessed structure

SP: airtight space

Claims (10)

A writing display device, including: a display panel, including: a light-transmitting substrate having a substrate surface; and a plurality of first microstructures disposed on the substrate surface; and a stylus adapted to touch the substrate surface of the display panel When writing on the stylus, the pen tip surface of the stylus is provided with a plurality of second microstructures. The first microstructures are suitable for extending into the second microstructures, or the second microstructures are suitable for extending into the third microstructures. A microstructure, wherein each of the first microstructures is one of a concave structure and a convex structure, and each of the second microstructures is the other of the concave structure and the convex structure, and the convex structure is suitable for Extend into the recessed structure and form an airtight space. The writing display device of claim 1, wherein the first microstructures are arranged at first pitch intervals along the first direction, and the second microstructures are arranged at second pitch intervals along the first direction. . The writing display device of claim 2, wherein the first pitch is equal to the second pitch. The writing display device of claim 1, wherein the pen tip is a ball, and the second microstructures are disposed on the surface of the ball. The writing display device of claim 1, wherein one of the substrate surface and the pen tip surface has an opening defining the recessed structure, the convex structure has a bottom surface, and the bottom surface of the convex structure connects the substrate surface and the pen tip surface. the other side of the nib surface Or, the ratio of the bottom surface width of the protruding structure along the first direction to the opening width of the opening along the first direction is greater than or equal to 1 and less than or equal to 1.9. The writing display device according to claim 1, wherein the recessed structure has a side wall connected to one of the substrate surface and the pen tip surface, and the angle between the side wall and the substrate surface and the pen tip surface is less than or equal to 90 Spend. The writing display device according to claim 1, wherein the protruding structure has a side wall connected to one of the substrate surface and the pen tip surface, and the angle between the side wall and the one of the substrate surface and the pen tip surface is greater than 90 degrees. And less than 180 degrees. The writing display device according to claim 1, wherein the air pressure of the airtight space is less than 1 atm and greater than or equal to 0.1 atm. The writing display device according to claim 1, wherein the Young's modulus of the protruding structure is smaller than the Young's modulus of the recessed structure. The writing display device according to claim 1, wherein the material of the first microstructures or the second microstructures includes conductive resin, silicone, or conductive fiber.

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