TWI720774B - Light emitting touch pad device - Google Patents

Abstract

The present invention discloses a light emitting touch pad device, which includes a circuit board, a plurality of sensors, a light guiding plate, a plurality of first spacing blocks, and a plurality of second spacing blocks. The sensors are disposed on the circuit board, and a distance between two geometric centers of the adjacent two sensors is a first length. The first spacing blocks and the second spacing block are disposed on an upper surface and a bottom surface of the light guiding plate, respectively, and are located within a nil-light dot area of the light guiding plate. A distance between two geometric centers of the adjacent two first spacing blocks is a second length, and a spacing of the adjacent two first space blocks is a third length. A distance between two geometric centers of the adjacent two second spacing blocks is a fourth length, and a spacing of the adjacent two second spacing blocks is a fifth length. The position of any second spacing block corresponds to the position between two of the first spacing blocks.

Description

Luminous touch panel device

The present invention relates to a touch panel device, in particular to a light-emitting touch panel device.

The traditional touch pad does not have a luminous effect, and usually only has a simple track input mode, and is often used to replace the input function of the mouse. In order to satisfy multiple input modes, a new type of touch panel application appears on the market, that is, a light-emitting touch panel device that combines a touch panel and a backlight module. Take most of the current light-emitting touchpad devices as an example. When the light is not on, it executes the normal touchpad mode (track detection), for example, it is used to control the mouse cursor; when it is light, it can display a specific pattern and execute it. Corresponding to the function of a specific pattern, such as displaying a numeric keyboard and performing a touch input mode. It is understandable that the specific pattern is usually the location of the light-emitting area.

The main structure of the light-emitting touch panel device includes a multilayer stacked film and a circuit board provided with light-emitting elements, and the layers are usually glued through water. In order to meet the sensing requirements of the touchpad (that is, to avoid misinterpretation by the touch system), the area that does not need to emit light (that is, the area that does not have a specific pattern) is usually covered with water glue, so that the surface of the touchpad is flat and It is not easy to deform under the user’s touch and pressure to avoid touch signals No inconsistency occurred. However, the direct coating of adhesive on the light guide film will produce an effect similar to optical dots (that is, the total reflection condition of the light propagation inside the film will be changed), so if the light guide film is Covering with water glue will cause the light-emitting efficiency of the light-emitting touch panel device to deteriorate. In view of this, the manufacturers of the existing light-emitting touch panel devices adopt a way of cloth glue that only follows the light emitting area and is in the shape of a mouth. However, this cloth glue method is easy to cause the user to press or touch. When the rubberized area (that is, the light emitting area), the degree of depression will be greater than that of the rubberized area. If the user presses the touchpad, the surface depression in different positions will be different. Pressing different positions will generate touch signals with different strengths, making it difficult for the system to accurately set the threshold for the touch signal determination, resulting in the touch system The rate of misjudgment of the position of the hit point has increased significantly.

In view of the above-mentioned problems, the main purpose of the present invention is to provide a light-emitting touch panel device, which has a plurality of spacers respectively arranged on two opposite surfaces of the light guide sheet, and solves the conventional light emission by the special arrangement relationship of the spacers. The touchpad device is easy to misjudge the position of the hit point.

To achieve the above objective, the present invention provides a light-emitting touch panel device, which includes a circuit board, a plurality of sensing elements, a light guide sheet, a light-emitting element, a plurality of first spacer blocks, a plurality of second spacer blocks, and a control unit. The sensing element is arranged on the circuit board, and the distance between the geometric centers of two adjacent sensing elements is a first length. The light guide sheet is arranged above the circuit board and includes at least one light spot area, at least one light spot area, and a bottom Surface and a top surface. A plurality of light spot parts are arranged in the light spot area, and no light spot parts are arranged in the non-light spot area. The bottom surface faces the circuit board, and the top surface is located on the opposite side of the bottom surface. The light emitting element is arranged adjacent to the light guide sheet and emits light toward the light guide sheet. The first spacer is arranged on the bottom surface and is located in the non-light spot area. The distance between the geometric centers of two adjacent first spacers is a second length, and the distance between two adjacent first spacers is a third length. The second spacer is arranged on the top surface and is located in the non-light spot area. The distance between the geometric centers of two adjacent second spacing blocks is a fourth length, and the spacing distance between two adjacent second spacing blocks is a fifth length. The position of any second spacer block corresponds to between two of the first spacer blocks. The control unit is electrically connected to the sensing element and the light emitting element.

According to an embodiment of the present invention, the fourth length is equal to the second length, and the fifth length is equal to the third length.

According to an embodiment of the present invention, the second length is twice the third length.

According to an embodiment of the present invention, the geometric center of any first spacer is aligned with the geometric center of one of the sensing elements.

According to an embodiment of the present invention, the geometric center of any second spacer is aligned with the geometric center of one of the sensing elements.

According to an embodiment of the present invention, the second length is less than or equal to twice the first length.

According to an embodiment of the present invention, the third length is less than a sixth length, and the sixth length is the diameter of a cylindrical metal test rod or the maximum size of the open end surface of a non-cylindrical metal test rod.

According to an embodiment of the present invention, the light-emitting touch panel device further includes a reflective sheet. The reflective sheet is arranged between the circuit board and the light guide sheet, and the first spacer is located between the light guide sheet and the reflective sheet and supports the light guide sheet.

According to an embodiment of the present invention, the circuit board further includes a plurality of protrusions, and the light-emitting touch panel device further includes a plurality of exhaust blocks. The exhaust block is arranged between the reflective sheet and the circuit board, and the exhaust block is located on the convex part respectively.

According to an embodiment of the present invention, the light-emitting touch panel device further includes a light-shielding sheet and a contact sheet. The light-shielding sheet is arranged above the light guide sheet, and the second spacer is located between the light-shielding sheet and the light guide sheet and supports the light-shielding sheet. The contact sheet is arranged above the shading sheet.

According to an embodiment of the present invention, each first spacer is a rubber block with flexibility after curing, and each second spacer is a rubber block with flexibility after curing.

As mentioned above, the light-emitting touch panel device according to the present invention includes a plurality of first spacers arranged on the bottom surface of the light guide sheet and a plurality of second spacer blocks arranged on the top surface of the light guide sheet. Both the first spacer block and the second spacer block are located in the non-light spot area. Wherein, the distance between the geometric centers of two adjacent first spacers is the second length, the separation distance between two adjacent first spacers is the third length, and the distance between the geometric centers of two adjacent second spacers It is the fourth length, and the separation distance between two adjacent second spacer blocks is the fifth length. In addition, the position of any second spacer block corresponds to between two of the first spacer blocks. In general, the first spacer block and the second spacer block are spaced and complementarily arranged in the non-light spot area of the light guide sheet, so that the user can press any position on the light-emitting touch panel device, and the touch surface can be uniform The ground is recessed, so it can generate touch signals with consistent intensity, In turn, the effect of avoiding system misjudgment is achieved. In addition, since the first spacer block and the second spacer block are arranged on the light guide sheet at intervals, the loss of light energy can be reduced, and the overall light extraction efficiency of the light-emitting touch panel device can be improved.

1, 1a, 1b: luminous touch panel device

10: Circuit board

11: Convex

12: Groove

20: Sensing parts

30: Light guide sheet

31: top surface

32: Bottom

33: Spot area

331: light spot

34: No light spot area

40: light-emitting parts

50, 50a: the first spacer block

51, 51a: second spacer block

60: control unit

70: reflective sheet

80: shading sheet

90: contact piece

100: exhaust block

A: Adhesive layer

B: Non-cylindrical metal test rod

D: Portable electronic device

G: specific pattern

L1: first length

L2: second length

L3: third length

L4: fourth length

L5: fifth length

L6: sixth length

FIG. 1 is a three-dimensional schematic diagram of a light-emitting touch panel device according to an embodiment of the present invention applied to a portable electronic device.

FIG. 2 is a schematic top view of the light-emitting touch panel device shown in FIG. 1.

3 is a schematic partial cross-sectional view of the light-emitting touch panel device shown in FIG. 2 when it is touched by a user's finger.

4 is a schematic partial cross-sectional view of the light-emitting touch panel device shown in FIG. 2 when it is touched by a metal test rod.

FIG. 5 is a schematic top view of the light guide sheet, the first spacer block and the second spacer block of the light-emitting touch panel device shown in FIG. 2.

6 is a schematic partial cross-sectional view of a light-emitting touch panel device according to another embodiment of the invention.

FIG. 7 is a schematic partial cross-sectional view of a light-emitting touch panel device according to another embodiment of the present invention.

In order to allow your reviewer to better understand the technical content of the present invention, preferred specific embodiments are described as follows.

FIG. 1 is a three-dimensional schematic diagram of a light-emitting touch panel device according to an embodiment of the present invention applied to a portable electronic device, FIG. 2 is a schematic top view of the light-emitting touch panel device shown in FIG. 1, and FIG. 3 is shown in FIG. 2. A partial cross-sectional schematic diagram of the light-emitting touch panel device shown in FIG. 2 when touched by a user's finger, FIG. 4 is a partial cross-sectional diagram of the light-emitting touch panel device shown in FIG. 2 being touched by a metal test rod, and FIG. 5 is a diagram The top view schematic diagram of the light guide sheet, the first spacer block and the second spacer block of the light-emitting touch panel device shown in 2 is shown in Figs. 1 to 5 at the same time. In this embodiment, the light-emitting touch panel device 1 can be a touch panel applied to a portable electronic device D (for example, a notebook computer), and can execute at least two different input modes. For example, the general input mode used to manipulate the mouse cursor (such as track detection); and the specific input mode corresponding to the specific pattern G displayed by the light-emitting touch panel device 1, such as the numeric keyboard pattern shown in FIG. 2 (Ie, the specific pattern G) corresponds to the touch input mode (described further below).

As shown in FIGS. 2 and 3, the light-emitting touch panel device 1 of this embodiment includes a circuit board 10, a plurality of sensing elements 20, a light guide sheet 30, a light-emitting element 40, a plurality of first spacer blocks 50, and a plurality of The second spacer 51 and a control unit 60. Wherein, the sensing element 20 and the light emitting element 40 are disposed on the circuit board 10, and the control unit 60 is electrically connected to the sensing element 20 and the light emitting element 40, and the control unit 60 receives the sensing signal (ie Touch signal), and control the light emitting element 40 to emit light according to the executed input mode. In addition, the control unit 60 can be arranged in the portable electronic device D (for example, a motherboard system) or on the circuit board 10 (for example, a micro-controller The present invention is not limited, so the control unit 60 in FIG. 2, FIG. 3, and FIG. 4 is simply shown as a block diagram.

In addition, in this embodiment, the sensing elements 20 are equally spaced apart. For example, the distance between the geometric centers of two adjacent sensing elements 20 is a first length L1 (as shown in FIG. 4). Preferably, the plurality of sensing elements 20 are arranged on the circuit board 10 in the form of a two-dimensional array, and each sensing element 20 may be a capacitive sensor. When a charged object approaches the circuit board 10, for example, when a finger (a charged object) touches the light-emitting touch panel device 1, the sensor 20 closer to the finger will generate an induced current due to the electric field, and then send A sensing signal related to the magnitude of the induced current is sent to the control unit 60. The control unit 60 learns the position of the finger touch, and generates a connection with the input mode currently being executed by the portable electronic device D to run the corresponding processing procedure (for example, operating the mouse cursor displayed on the screen).

As shown in FIGS. 4 and 5, the light guide sheet 30 is disposed above the circuit board 10. The light-emitting element 40 of this embodiment is arranged near the side edge of the light guide plate 30 and emits light toward the light guide plate 30. The light guide plate 30 of this embodiment includes a top surface 31, a bottom surface 32, at least one spot area 33, and at least one non-light spot area 34. In this embodiment, the light guide plate 30 includes a plurality of light spot areas 33 and a plurality of non-light spots. Take the dot area 34 as an example. Wherein, the bottom surface 32 faces the circuit board 10, the top surface 31 is located on the opposite side of the bottom surface 32, and the top surface 31 is a light-emitting surface. It should be noted that FIGS. 3 and 4 are partial cross-sectional schematic diagrams corresponding to the no-spot area 34, and the light-spot area 33 is not shown in FIGS. 3 and 4; FIG. 5 is viewed from the side where the top surface 31 is located. Schematic of the top view. The light spot area 33 is provided with a plurality of light spot portions 331, which are densely arranged optical dot structures (please refer to the partial enlarged area in FIG. 5), In addition, the light spots 331 are arranged to form a specific pattern G, so FIG. 5 shows the specific pattern G filled with black. The light spot portion 331 may be provided on the top surface 31 or the bottom surface 32, and the present invention is not limited. Wherein, each light dot portion 331 may be a dot formed by printing ink, or may be a microstructure that roughens the surface of the light guide plate 30, such as a microstructure that is convex outward or concave inward to eliminate light. The condition of total reflection propagating inside the light guide 30. When the light emitted by the light emitting element 40 reaches the light spot area 33 in the light guide plate 30, part of the light will be guided to the top surface 31 (light emitting surface) by the light spot portion 331. Since the light spot portion 331 destroys the total reflection of this part of the light, the light will change direction and propagate toward the top surface 31.

In other words, only the area where the light spot portions 331 are distributed (ie, the light spot area 33) can present a visual light-emitting effect. In this embodiment, the light spot portions 331 in at least one light spot area 33 of the plurality of light spot areas 33 are arranged in the aforementioned specific pattern G, such as the numbers, operation characters, arrows, and numbers shown in FIG. 2 Text etc. In other words, the arrangement of the light spot portion 331 in the partial light spot area 33 presents a specific pattern G such as numbers, arithmetic characters, arrows, or characters. In the touch input mode, the control unit 60 controls the light emitting element 40 to emit light, so that the light enters the light guide plate 30 and reaches the light spot portion 331, so that the light is guided to the top surface 31 (light emitting surface), and the specific pattern G appears A light-emitting effect is provided for the user to recognize where the (virtual) button is on the touchpad. Conversely, since no light spot portion 331 is provided in the non-light-spot area 34, the non-light-spot area 34 does not have a luminous effect visually.

As shown in FIGS. 4 and 5, the first spacer 50 and the second spacer 51 of this embodiment are located in the non-light spot area 34. Moreover, the first spacer 50 is arranged on the light guide sheet The bottom surface 32 of the light guide plate 30 and the second spacer 51 are provided on the top surface 31 of the light guide plate 30. In this embodiment, the distance between the geometric centers of two adjacent first spacers 50 is a second length L2, and the distance between two adjacent first spacers 50 is a third length L3. The distance between the geometric centers of two adjacent second spacers 51 is a fourth length L4, and the distance between two adjacent second spacers 51 is a fifth length L5. In other words, the distance between the geometric centers of the two first spacers 50 that are closest to each other is the second length L2, and the separation distance is the third length L3. Similarly, the distance between the geometric centers of the two second spacers 51 that are closest to each other is the fourth length L4, and the separation distance is the fifth length L5. Preferably, the separation distance between the first spacer 50 and the second spacer 51 can be the same, that is, the fourth length L4 is equal to the second length L2, and the fifth length L5 can be equal to the third length L3.

In addition, the separation distance (the third length L3) between two adjacent first spacers 50 that are closest to each other may be the same as the length of the first spacer 50, so that the second length L2 is twice the third length L3. Preferably, the geometric center of any first spacer 50 is aligned with the geometric center of one of the sensing elements 20, and the geometric center of any second spacer 51 is also aligned with the geometric center of one of the sensing elements 20. In addition, the second length L2 (the distance between the geometric centers of two adjacent first spacer blocks 50) may be less than or equal to twice the first length L1 (the distance between the geometric centers of two adjacent sensing members 20) In this embodiment, the second length L2 is less than twice the first length L1, and is substantially equal to the first length L1. In other words, in this embodiment, the two first spacer blocks 50 with the closest positions (or the two second spacer blocks 51 with the closest positions) The distance between the geometric centers is the same as the distance between the geometric centers of two adjacent sensing elements 20.

In addition, the position of any second spacer 51 corresponds to the position between two of the first spacer 50, so that the first spacer 50 and the second spacer 51 are arranged in a complementary manner on the two sides of the light guide plate 30. surface. In general, the first spacer block 50 and the second spacer block 51 are spaced and complementary arranged in the non-light spot area 34 of the light guide plate 30, the first spacer block 50 is arranged on the bottom surface 32 of the light guide plate 30, and The second spacer 51 is provided on the top surface 31. With the complementary arrangement of the first spacer 50 and the second spacer 51, no matter where the user presses the light-emitting touch panel device 1, the touch surface can be evenly and slightly recessed, so that uniform intensity can be generated. Touch signal. Therefore, the system of the light-emitting touch panel device 1 can easily and accurately set the determination threshold of the touch signal, thereby achieving the effect of preventing the touch system from misjudging the position of the touch point.

In the quality inspection stage of the light-emitting touch panel device 1, a cylindrical metal test rod or a non-cylindrical metal test rod B (for example, a square tower) is often used for standard touch accuracy testing. In this embodiment, the maximum dimension of the open end surface of the non-cylindrical metal test rod B is defined as the sixth length L6, as shown in FIG. 4. In other embodiments where the cylindrical metal test rod is used for testing, the diameter of the cylindrical metal test rod can be defined as the sixth length L6. Therefore, in order to achieve a better effect of avoiding system misjudgment, the light-emitting touch panel device 1 can be designed as follows: the third length L3 is less than the sixth length L6, and the fifth length L5 is less than the sixth length L6. In other words, in this embodiment, the first spacer 50 and the second spacer 51 are arranged at intervals, and the separation distance (the third length L3) of the two adjacent first spacers 50 and the two adjacent second spacers 51 The separation distance (the fifth length L5) is smaller than the maximum size (the sixth length L6) of the open end surface of the non-cylindrical metal test rod B to achieve a better effect of avoiding misjudgment by the touch system.

In this embodiment, each first spacer 50 and each second spacer 51 is a rubber block with flexibility after curing. Specifically, the bottom surface 32 or the top surface 31 of the light guide sheet 30 can be coated with a technology such as screen printing at intervals, such as water glue, which is cured and resistant to flexibility, and the first surface can be formed after curing. The spacing block 50 and the second spacing block 51. Therefore, the first spacer 50 and the second spacer 51 can be used to connect other diaphragms in the light-emitting touch panel device 1.

Specifically, the light-emitting touch panel device 1 of this embodiment further includes a reflective sheet 70, a black mask 80, and a contact sheet 90. Wherein, the reflective sheet 70 is disposed between the circuit board 10 and the light guide sheet 30. The reflective sheet 70 and the circuit board 10 of this embodiment are connected to each other through an adhesive layer A formed by a covered adhesive (for example, a kind of water glue), while the reflective sheet 70 and the light guide sheet 30 are connected through the first The spacer block 50 is connected. Specifically, the first spacer 50 is located between the light guide sheet 30 and the reflection sheet 70, and can connect the light guide sheet 30 and the reflection sheet 70 and support the light guide sheet 30. Wherein, the reflection sheet 70 can reflect the light refracted from the bottom surface 32 of the light guide sheet 30 back into the light guide sheet 30, thereby improving the utilization rate of light energy. In addition, the light shielding sheet 80 is disposed above the light guide sheet 30, and the contact sheet 90 is disposed above the light shielding sheet 80. The material of the contact sheet 90 can be mylar, glass or other materials suitable for the surface of the touch panel, and the present invention is not limited. In addition, the light-shielding sheet 80 and the contact sheet 90 can be completely covered with adhesive (form another adhesive layer A) While glued together, the light shielding sheet 80 and the light guide sheet 30 are connected through the second spacer block 51, so that the second spacer block 51 is located between the light shielding sheet 80 and the light guide sheet 30. Therefore, the second spacer 51 can connect the light guide sheet 30 and the light shielding sheet 80 and support the light shielding sheet 80. In some other embodiments, the light-shielding sheet 80 can also be directly formed on the side of the contact sheet 90 facing the light guide sheet 30 through printing ink, so that one of the adhesive layers A can be omitted.

Generally speaking, the various layers of film (for example, the aforementioned light guide sheet 30 and the reflective sheet 70) are connected by a flexible adhesive after curing such as water glue. In order to meet the sensing requirements of the touch panel (that is, try to keep the surface as flat as possible to avoid misinterpretation by the touch system), the prior art is to completely cover the non-light spot area 34 of the light guide 30 with water glue (form similar to the aforementioned Adhesive layer A), but it will destroy the conditions for total reflection of light in the light guide 30. In this way, in addition to affecting the transmission of light inside the light guide 30, it will also increase the loss of light energy, thus Reduce the overall light extraction efficiency of the light-emitting touch panel device 1. In this embodiment, the first spacer 50 and the second spacer 51 are arranged at intervals in the non-light spot area 34 on the light guide sheet 30, which not only maintains the adhesion between the light guide sheet 30 and the reflective sheet 70 and the light shielding sheet 80 Function, because the distribution area of the first spacer 50 and the second spacer 51 is significantly smaller than the area completely covered with water glue, the loss of light energy can be reduced, and the overall light extraction efficiency of the light-emitting touch panel device 1 can be effectively improved.

FIG. 6 is a schematic partial cross-sectional view of a light-emitting touch panel device according to another embodiment of the present invention. Please refer to FIG. 6. First of all, the difference between the light-emitting touch panel device 1a of this embodiment and the previous embodiment is: the first spacer 50a and the second spacer 51a The configuration (number and spacing are different), and the length (different size) of each first spacer block 50a and each second spacer block 51a, so the numbers of other components are the same as the previous embodiment. In this embodiment, the second length L2 (the distance between the geometric centers of two adjacent first spacers 50a) is substantially equal to the first length L1 (the distance between the geometric centers of two adjacent sensing elements 20) Twice. In other words, in this embodiment, the first spacer 50a and the second spacer 51a are arranged in a staggered manner, so that the width of the gap between two adjacent first spacers 50a or two adjacent second spacers 51a is the same and shifted from each other. In addition, since the lengths of the first spacer block 50a and the second spacer block 51a are relatively long, the position of any second spacer block 51a corresponds to between two adjacent first spacer blocks 50a. In other words, in this embodiment, the distance between any first spacer 50a and the closest second spacer 51a in the horizontal direction is very small. If they can overlap in the vertical direction, the distance can even be zero. Therefore, when the user performs a touch action on the contact sheet 90 of the light-emitting touch panel device 1a, especially when the finger drags and slides, the two adjacent first spacer blocks 50a and the adjacent two second spacer blocks 51a The width of the gap is the same, and the distance between the first spacer 50a and the second spacer 51a in the horizontal direction is small, so the user’s fingers will not feel the pause caused by the surface depression, which can improve the user’s The operating experience of the light-emitting touch panel device 1a.

As shown in FIG. 3, generally speaking, the circuit board 10 will show an uneven concave-convex structure on the surface of the circuit board 10 due to the distribution of circuit traces or components. Therefore, in this embodiment, the circuit board 10 includes a plurality of convex portions 11 (usually lines or components below) arranged at intervals and a plurality of grooves 12 located between the convex portions 11. Since the reflective sheet 70 and the circuit board 10 are covered by an adhesive (for example, water glue) In connection, it is inevitable that some air will be covered during the process of attaching the reflective sheet 70 to the circuit board 10. Although the enclosed air usually presents small bubbles randomly distributed in the corners of the groove 12 at the beginning, as indicated by the arrow in Figure 3. However, since water glue is a material that will soften when heated, so After the user uses the light-emitting touch panel device 1 for a long time (for example, the waste heat emitted by the sliding of the finger or the operation of the portable electronic device D itself will increase the softening of the water glue), the small holes originally scattered in the groove 12 The bubbles will gather into relatively large-sized bubbles, causing the surface of the light-emitting touch panel device 1 to bulge. This non-ideal situation is generally referred to as a "strand pack". In order to reduce the occurrence of strands as much as possible, in one embodiment, the exhaust block 100 (see FIG. 7) can be provided to achieve the exhaust effect after the reflective sheet 70 is attached to the circuit board 10.

FIG. 7 is a partial cross-sectional schematic diagram of a light-emitting touch panel device according to another embodiment of the present invention. Please refer to FIG. 7. The difference between the light-emitting touch panel device 1 b of this embodiment and the light-emitting touch panel device 1 of the previous embodiment is that the light-emitting touch panel device 1 b further includes a plurality of exhaust blocks 100. The exhaust block 100 is disposed between the reflective sheet 70 and the circuit board 10, and the exhaust block 100 is located on the convex portion 11 respectively. In addition, the exhaust block 100 may also be a flexible rubber block after curing for connecting the circuit board 10 and the reflective sheet 70. Specifically, when the light-emitting touch panel device 1b is manufactured, the convex portion 11 of the circuit board 10 may be coated with a flexible adhesive after curing such as water glue, and the exhaust block 100 can be formed after curing. In other words, in this embodiment, the circuit board 10 and the reflective sheet 70 are connected by the exhaust block 100 provided on the convex portion 11 of the circuit board 10. In addition to the design of the exhaust block 100 so that the groove 12 no longer becomes a dead space for air accumulation, even if a large amount of air is covered when the reflective sheet 70 is attached to the circuit board 10, the groove 12 can also be used with the reverse The exhaust channel formed by the gap between the shoots 70 completely exhausts the excess gas to achieve the effect of exhausting, thus avoiding the generation of strands.

In summary, the light-emitting touch panel device according to the present invention includes a plurality of first spacers arranged on the bottom surface of the light guide sheet and a plurality of second spacer blocks arranged on the top surface of the light guide sheet. Both the first spacer block and the second spacer block are located in the non-light spot area. Wherein, the distance between the geometric centers of two adjacent first spacers is the second length, the separation distance between two adjacent first spacers is the third length, and the distance between the geometric centers of two adjacent second spacers It is the fourth length, and the separation distance between two adjacent second spacer blocks is the fifth length. In addition, the position of any second spacer block corresponds to between two of the first spacer blocks. In general, the first spacer block and the second spacer block are spaced and complementarily arranged in the non-light spot area of the light guide sheet, so that the user can press any position on the light-emitting touch panel device, and the touch surface can be uniform The ground is recessed, so a touch signal with consistent intensity can be generated, thereby achieving the effect of avoiding misjudgment by the touch system. In addition, since the first spacer block and the second spacer block are arranged on the light guide sheet at intervals, the loss of light energy can be reduced, and the overall light extraction efficiency of the light-emitting touch panel device can be improved.

It should be noted that many of the above-mentioned embodiments are given as examples for the convenience of description, and the scope of rights claimed in the present invention should be subject to the scope of the patent application, and not limited to the above-mentioned embodiments.

1: Illuminated touchpad device

10: Circuit board

11: Convex

12: Groove

20: Sensing parts

30: Light guide sheet

31: top surface

32: Bottom

40: light-emitting parts

50: first interval block

51: second spacer block

60: control unit

70: reflective sheet

80: shading sheet

90: contact piece

A: Adhesive layer

Claims (11)

A light-emitting touch panel device includes: a circuit board; a plurality of sensing elements are arranged on the circuit board, the distance between the geometric centers of two adjacent sensing elements is a first length: a light guide sheet is arranged Above the circuit board, it includes at least one light spot area, at least one light spot area, a bottom surface and a top surface, the at least one light spot area is provided with a plurality of light point portions, and the at least one light spot area Without any of the light spot portions, the bottom surface faces the circuit board, and the top surface is located on the opposite side of the bottom surface; a light emitting element is arranged adjacent to the light guide sheet and emits light toward the light guide sheet; A plurality of first spacers are arranged on the bottom surface and located in the at least one non-light spot area, the distance between the geometric centers of two adjacent first spacers is a second length, and two adjacent first spacers The spacing distance of is a third length; a plurality of second spacing blocks are arranged on the top surface and located in the at least one non-light spot area, and the distance between the geometric centers of two adjacent second spacing blocks is a fourth Length, the distance between two adjacent second spacer blocks is a fifth length, and the position of any one of the second spacer blocks corresponds to between two of the first spacer blocks; and a control unit , To electrically connect the sensing elements and the light-emitting element. The light-emitting touch panel device according to claim 1, wherein the fourth length is equal to the second length, and the fifth length is equal to the third length. According to the light-emitting touch panel device described in claim 2, wherein the second length is twice the third length. According to the light-emitting touch panel device described in claim 2, wherein the geometric center of any one of the first spacers is aligned with the geometric center of one of the sensing elements. According to the light-emitting touch panel device described in claim 2, wherein the geometric center of any of the second spacers is aligned with the geometric center of one of the sensing elements. The light-emitting touch panel device according to any one of claims 3 to 5, wherein the second length is equal to the first length, or equal to twice the first length. The light-emitting touch panel device according to any one of claims 3 to 5, wherein the third length is less than a sixth length, and the sixth length is the diameter of a cylindrical metal test rod or a non-cylindrical The maximum size of the open end surface of the type metal test rod. The light-emitting touch panel device described in item 1 of the scope of patent application further includes: A reflective sheet is arranged between the circuit board and the light guide sheet, and the first spacer blocks are located between the light guide sheet and the reflective sheet and support the light guide sheet. For example, please apply for the light-emitting touch panel device described in item 8 of the scope of patent application, wherein the circuit board further includes a plurality of convex portions, and the light-emitting touch panel device further includes: a plurality of exhaust blocks disposed on the reflective sheet and the circuit board In between, the exhaust blocks are respectively located on the convex portions. For example, the light-emitting touch panel device described in claim 1 of the scope of patent application further includes: a light-shielding sheet disposed above the light guide sheet, the second spacers are located between the light-shielding sheet and the light guide sheet, and Supporting the shading sheet; and a contact sheet arranged above the shading sheet. According to the light-emitting touch panel device described in item 1 of the scope of patent application, each of the first spacers is a rubber block that has resistance to flexibility after curing, and each of the second spacers is a rubber block that has resistance to flexibility after curing. Sexual plastic block.

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