CN202275238U - Optical touch display module - Google Patents

Abstract

An optical touch display module is suitable for a display assembly. The display assembly has a display surface. The optical touch display module comprises at least one sensing component, a light guide component and a light source. The sensing component and the light guide component are respectively arranged on the periphery of the display surface, and the light guide component is provided with at least one bend. The light source is arranged beside the light guide component and emits light towards the light guide component, and the bent light is positioned on the transmission path of the light. The light is transmitted to the front of the display surface through the light guide component to define a sensing space. When at least one touch object enters the sensing space, the sensing component senses the light change caused by the touch object.

Description

Optical touch display module

technical field

The utility model relates to a display module, in particular to an optical touch display module. the

Background technique

There are many ways to realize the touch interface in the known technology. For example, in some known liquid crystal displays, a layer of touch film is pasted on the panel to realize capacitive or resistive touch. Alternatively, there is also a known technology to make tiny touch components in the liquid crystal display panel. However, attaching a layer of touch film on the panel or making tiny touch components in the LCD panel will affect the light transmittance of the LCD, resulting in a decrease in the optical quality of the LCD. the

Another known technology uses optical sensing to determine the position of the finger or the stylus relative to the screen. For example, these known technologies can determine the position of the finger by capturing dark spots or bright spots (that is, dark spots or bright spots formed by touching the screen with a finger or a stylus). the

Generally, in order to make the bright or dark spots clearly identifiable and reduce the probability of misjudgment by the sensing module, a good and uniform light source can be provided so that the bright or dark spots are more obvious than the backlight. These backlight sources can be produced by arranging light guide components around the display surface of the screen to achieve the desired effect. However, the light emitted by the light source will reduce the brightness of the light output as the length of the light guide component increases or its shape is bent, which will easily cause uneven light transmitted to the screen, resulting in unreadable or misjudgment by the sensor. the

Utility model content

The purpose of the utility model is to provide an optical touch display module, which can provide sufficient brightness and uniform light in the sensing space. the

In order to achieve the above purpose, the optical touch display module provided by the utility model is suitable for a display component, the display component has a display surface, and the optical touch module includes:

At least one sensing component is arranged on the periphery of the display surface;

At least one light guide component is disposed on the periphery of the display surface, and the light guide component has at least one bend; and

A light source is arranged beside the light guide component and emits light toward the light guide component, and the bend is located on the transmission path of the light, and the light is transmitted to the front of the display through the light guide component to define a sensing space , when at least one touch object enters the sensing space, the sensing component senses a light change caused by the touch object. the

In the optical touch display module, the at least one light guide component includes at least two components assembled together. the

In the above-mentioned optical touch display module, the bending is located at the junction of any two components. the

In the optical touch display module, the light guide component is a U-shaped member surrounding part of the display surface. the

In the optical touch display module, the light guide component has an angled slope at the bend, and the light passes through the angled slope to change the transmission direction. the

In the above-mentioned optical touch display module, the angled inclined plane is an angled plane of the light guide component. the

In the optical touch display module, an angle is formed between the inclined surface and the non-bending part of the light guide component, and the angle is 30° to 60°. the

The optical touch display module, wherein the angle is 45 degrees. the

The utility model also provides an optical touch display module, which is suitable for a display component. The display component has a display surface. The optical touch module includes:

A U-shaped light guide component surrounds part of the display surface. The U-shaped light guide component has two light incident surfaces respectively located at both ends, at least one light output surface located on the inner side, and at least one light output surface located at the bend. angle slope;

At least one light source is arranged beside the light incident surface; and

At least one sensing component is arranged beside the display surface, wherein the light source emits light toward the light incident surface, and transmits light to the display surface through the light exit surface, so as to define a sensing space, when at least one touch object enters During the sensing space, the sensing component senses the light change caused by the touch object. the

The optical touch display module, wherein the angled slope forms an angle with the non-bending part of the light guide component, and the angle is 30° to 60°. the

The optical touch display module, wherein the angle is 45 degrees. the

In the optical touch display module, the U-shaped light guide assembly is an integral structure, or a structure composed of at least two parts. the

In the above-mentioned optical touch display module, the angled slope is the joint surface of any two components. the

In the above-mentioned optical touch display module, the angled inclined plane is a chamfering plane of the U-shaped light guide component at the bend. the

The utility model also provides an optical touch display module, which is suitable for a display component. The display component has a display surface. The optical touch module includes:

At least one sensing component is arranged on the periphery of the display surface;

A light guide strip is disposed on the periphery of the display surface, and the light guide strip has at least one angled slope; and

A light source is arranged at one end of the light guide strip and emits light toward the light guide strip, and the angled slope is located on the transmission path of the light and forms an angle with the transmission path of the light, and the light is transmitted to the light guide strip through the light guide strip. The front of the display defines a sensing space. When at least one touch object enters the sensing space, the sensing component senses the light change caused by the touch object. the

The optical touch display module, wherein the angle is 30 degrees to 60 degrees. the

In the optical touch display module, the angle is 45 degrees. the

The optical touch display module, wherein the light guide strip has a light incident surface and at least one light exit surface, and on the transmission path of the light in the light guide strip, the angle slope is located between the light incident surface and the light exit surface. between faces. the

In the optical touch display module, the angled slope is connected between two adjacent light-emitting surfaces, and the light-emitting surfaces intersect with the angled slope to form a straight line. the

In the optical touch display module, the light guide strip has at least one bend, and the angled slope is located at the bend. the

In the optical touch display module, the angled slope is a chamfered plane at the bend. the

In the optical touch display module, the light guide strip has a U-shaped profile. the

The optical touch display module, wherein the light guide bar includes at least two parts connected to each other, and the angled slope is located at the connection of these parts. the

Based on the above, the optical touch display module of the present invention effectively transmits the light to the light-emitting surface of the farther light transmission path through the reflective surface of the light guide component, or to the light-emitting surface with bending. The light emitting surface of the light transmission path allows each light emitting surface of the light guide component to transmit light with sufficient brightness to the sensing space, thereby improving the accuracy of the sensing component in judging the touch objects in the touch space. the

Description of drawings

FIG. 1 is a top view of an optical touch display module according to an embodiment of the present invention. the

Fig. 2 is a sectional view of the optical touch display module of Fig. 1 along line I-I'. the

FIG. 3 is a schematic diagram of some components in the optical touch display module of FIG. 1 . the

Fig. 4 is a cross-sectional view of the light guide assembly of Fig. 3 along J-J'. the

Fig. 5 is an assembly diagram of a light guide assembly according to another embodiment of the present invention. the

Explanation of main component symbols in the attached drawings:

10, 30 optical touch display module; 20 touch object; 100 optical touch module; 110 light source; 120 sensing component; 200 display component; 300, 500 light guide component; Second part; 300C, 500C third part; 400 reflection material; C1 sensing space; L1 light transmission path; P1, P2 light incident surface; P3, P4, P5 light exit surface; P6, P7, P8 first reflective surface; , P9A second reflective surface; S1 display surface; T1 acute angle. the

Detailed ways

The optical touch display module proposed by the utility model is suitable for a display component. The display component has a display surface. The optical touch module includes at least one sensing component, a light guide component and a light source. The sensing component and the light guiding component are respectively arranged around the display surface, wherein the light guiding component has at least one bend. The light source is arranged beside the light guide component and emits light toward the light guide component, and is bent on the transmission path of the light. The light is transmitted to the front of the display through the light guide component to define a sensing space. When at least one touch object enters the sensing space, the sensing component senses the light change caused by the touch object. the

The utility model also provides an optical touch display module, which is suitable for a display component. The display component has a display surface. The optical touch module includes a U-shaped light guide component, two light sources and at least one sensing component. The U-shaped light guide component surrounds part of the display surface. The U-shaped light guide assembly has two light-incident surfaces respectively located at two ends, at least one light-exit surface located on the inner side, and at least one angled inclined surface located at the bend. The light source is arranged beside the light incident surface. The sensing component is arranged beside the display surface. The light source provides light that is transmitted from the light incident surface to the U-shaped light guide component, and transmitted from the light exit surface to the front of the display to define a sensing space. When at least one touch object enters the sensing space, the sensing component senses the light change caused by the touch object. the

The utility model also provides an optical touch display module, which is suitable for a display component. The display component has a display surface. The optical touch module includes at least one sensing component, a light guide strip and a light source. The sensing component and the light guide strip are arranged around the display surface. The light guide strip has at least one angled slope. The light source is arranged at one end of the light guide strip and emits light toward the light guide strip, and the angled slope is located on the transmission path of the light and forms an angle with the transmission path of the light. The light is sent to the front of the display through the light guide strip to define a sensing space. When at least one touch object enters the sensing space, the sensing component senses the light change caused by the touch object. the

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with accompanying drawings. the

FIG. 1 is a top view of an optical touch display module according to an embodiment of the present invention. Fig. 2 is a sectional view of the optical touch display module of Fig. 1 along line I-I'. Please refer to FIG. 1 and FIG. 2 at the same time. In this embodiment, the optical touch display module 10 includes two optical touch modules 100 , a display component 200 and a light guide component 300 . The display component 200 is, for example, a liquid crystal display, which has a display surface S1, and the optical touch module 100 and the light guide component 300 are respectively disposed around the display surface S1. In a preferred embodiment of the present invention, the optical touch display module 10 is suitable for a display surface S1 of less than 6 inches, and there is no limit to the number of optical touch modules 100 and relative to the display surface S1. The designer can properly configure the position according to the different sizes of the display surface S1. Each optical touch module 100 includes a light source 110 and a sensing component 120 that are electrically connected to each other. The light source 110 is, for example, an invisible light source such as infrared rays, but this embodiment is not limited thereto. The light component 300 is transmitted to the front of the display surface S1 , thereby forming a surface light source with uniform brightness beside the sensing space C1 and defining a sensing space C1 with the light guide component 300 . the

Specifically, when the touch object 20 enters the sensing space C1, since the touch object 20 changes the light variation in the sensing space C1, the sensing component 120 will therefore sense the light reflected by the touch object 20 ( or the light covered by the touch object 20), that is, due to the change of the traveling direction of the light, the image on the sensing element 120 is a bright spot (or a dark spot), and then it is judged that the touch The position of the object 20 in the sensing space C1 is obtained to obtain the position of the touch object 20 relative to the display surface S1, and the control module (not shown) performs signal processing to achieve the effect of optical touch. the

FIG. 3 is a schematic diagram of some components in the optical touch display module of FIG. 1 . Please refer to FIG. 1 to FIG. 3 at the same time. In order to enable the sensing component 120 to quickly and correctly judge the brightness change produced by the touch object 20 in the sensing space C1, it provides uniform and certain brightness light to the sensing space. C1 has its necessity. Based on the above, the light guide assembly 300 is a light guide bar surrounding the display surface S1 in accordance with the above requirements, which includes a first part 300A, a second part 300B on both sides, and two parts 300A, 300B connected thereto. A third component 300C between them forms a U-shaped structure with two bends. However, the lengths of the components 300A to 300C are not limited here, and the designer can make appropriate changes according to the appearance of the display surface S1 of the display component 200 . the

Fig. 4 is a cross-sectional view of the light guide assembly of Fig. 3 along J-J'. Please refer to FIG. 3 and FIG. 4 at the same time. Here, since the cross-sectional structures of the first component 300A, the second component 300B and the third component 300C are the same, only the cross-section of the third component 300C is shown as a representative. In this embodiment, the first component 300A and the second component 300B respectively have light incident surfaces P1 and P2 at the ends and light output surfaces P3 and P4 on the inside, while the third component 300C has a U-shaped The inner side of the structure is adjacent to the light-emitting surface P5 between the light-emitting surfaces P3 and P4. Furthermore, the first component 300A, the second component 300B and the third component 300C also have first reflective surfaces P6, P7 and P8 located on the outside, respectively, so that the light rays on the components 300A to 300B can only be emitted from their light emitting surfaces. P3 to P5 are transmitted to the sensing space C1 to avoid possible light leakage. Accordingly, the light generated by the light source 110 respectively enters the first part 300A and the second part 300B of the light guide assembly 300 through the light incident surfaces P1 and P2, and part of the light is directly transmitted from the light exit surfaces P3 and P4 to the sensing space C1. . In addition, each component 300A to 300C is equipped with a reflective material 400 (including bonding or coating) on its outer side, so that part of the light is reflected by the first reflective surfaces P6 to P8 and transmitted from the light emitting surfaces P3 to P5 to the sensing space C1. the

It should be noted that, in this embodiment, the light transmission paths of the light emitting surfaces P3 and P4 relative to the light source 110 are smaller than the light transmission paths of the light emitting surface P5 relative to the light source 110 . In other words, in this embodiment, only one light source 110 is disposed on each of the light-incident surfaces P1 and P2 to save power and manufacturing cost of the optical touch display module 100 . Under this premise, in order to make the light transmitted to the sensing space C1 generate a light field with uniform brightness, in addition to the first part 300A and the second part 300B located on opposite sides of the display surface S1, some The light can be transmitted from the light emitting surface P5 of the third component 300C to the sensing space C1. In view of this, the light guide assembly 300 of this embodiment also has a second reflective surface P9 located at the bend of its U-shaped structure, which is an inclined plane with an angle relative to the light path L1 in the light guide assembly 300, and this The inclined surface of the angle forms an angle with the non-bending part of the light guide assembly 300, that is, the second reflective surface P9 forms an acute angle T1 with the light path L1 of the light in the light guide assembly 300, so that the first part 300A and the second part Part of the light from 300B can be transmitted to the third component 300C through the second reflective surface P9, so that the light entering from the light-incident surfaces P1 and P2 can be transmitted from the light-emitting surfaces P3 to P5 to the sensing space C1 respectively. In other words, since the light guide assembly 300 has a bend, the inclined surface at the bend (that is, the second reflective surface P9) allows the light to be smoothly transmitted to the third component 300C, so as to improve the transmission of the light to the third component. 300C chance. the

In this embodiment, the acute angle T1 ranges from 30 degrees to 60 degrees, and preferably 45 degrees, so that part of the light in the first component 300A and the second component 300B can be transmitted to the The third component 300C, so that the light emitting surface P5 of the third component 300C can also transmit light with sufficient brightness to the sensing space C1. In addition, the light guide assembly 300 is designed with angled slopes (second reflective surface P9) at the two bends of its U-shaped structure, but this embodiment is not limited to this, and the designer can rely on the number of light sources 110 and their The intensity of the generated light determines the position, number and angle of the second reflective surface P9 in the light guide assembly 330, that is, in another embodiment of the present utility model, the light guide assembly 300 can also be bent only at one of them The second reflective surface P9 is set at the place. the

In this embodiment, the second reflective surface P9 is actually formed by integrally forming a chamfered plane at the outer bending point of the light guide assembly 300, that is, the third part 300C and the first part respectively The junction of 300A and the second part 300B forms a chamfer plane opposite to the first light-emitting surface P3, the second light-emitting surface P4 and the third light-emitting surface P5, so that the light can pass through the first part 300A or the second light-emitting surface respectively. Part 300B reflects to a third part 300C. In addition, like the above-mentioned first reflective surfaces P6, P7 and P8, the reflective material 400 can also be provided on the chamfered plane (second reflective surface P9) to improve the reflectivity of the chamfered plane (second reflective surface P9) . the

On the other hand, the present invention does not limit the formation method of the light guide assembly. Fig. 5 is an assembly diagram of a light guide assembly according to another embodiment of the present invention. Please refer to FIG. 5 , where the first part 500A on the left side is used to describe the situation after assembly, and the second part 500B on the right side is used to describe the situation before assembly. The composition of the light guide assembly 500 can be clearly identified by comparing the two places with each other. . Different from the above-mentioned embodiments, the first to third parts 500A to 500C of the light guide assembly 500 of this embodiment are separated from each other, and it is worth mentioning that the second reflective surface P9A is any two adjacent parts (the first component 500A and the third component 500C, or the second component 500B and the third component 500C), that is, the second reflective surface P9A intersects the light-emitting surfaces P4 and P5 on the same line (the second on the other side The same is true for the reflective surface P9 and the light-emitting surfaces P3 and P5 ), so that the second reflective surface P9A can also achieve the same reflection effect as the second reflective surface P9 in the above-mentioned embodiment. In addition, in another unillustrated embodiment, the light guide assembly can also be assembled from an L-shaped part and a strip-shaped part. According to this, the designer can adjust the light source and guide according to the light field requirements of the sensing space. Optical components are properly matched. the

To sum up, in the above-mentioned embodiments of the present invention, the optical touch display module uses the reflective surface of the light guide component to effectively transmit the light to the light-emitting surface of the farther light transmission path through the reflective surface. , or transmitted to the light-emitting surface with a bent light transmission path, so that each light-emitting surface of the light guide component can transmit light with sufficient brightness to the sensing space, so that the light field in the sensing space has a more uniform brightness , so as to improve the accuracy rate of the sensing component in judging the touch object located in the touch space. the

Although the present utility model has been disclosed as above with the embodiment, it is not intended to limit the present utility model. Anyone with ordinary knowledge in the technical field can make some changes without departing from the spirit and scope of the present utility model. and retouching, so the scope of protection of the present utility model should be defined by the scope of the appended patent application. the

Claims (23)

1. an optical touch control display module is applicable to a display module, and this display module has a display surface, it is characterized in that, this optical touch control module comprises:

At least one sensing component is configured in the periphery of this display surface;

At least one leaded light component be configured in the periphery of this display surface, and this leaded light component has at least one bending; And

One light source; Be configured in by this leaded light component and and emit beam towards this leaded light component; And should bend the position on the transfer path of light; To define a sensing space, when at least one touch object got into this sensing space, this sensing component senses the light that this touch object causes to be changed light through this leaded light component and before being sent to this display surface.

2. optical touch control display module according to claim 1 is characterized in that, wherein this at least one leaded light component comprises at least two parts that fit together.

3. optical touch control display module according to claim 2 is characterized in that, wherein should a bending joint at any two parts.

4. optical touch control display module according to claim 1 is characterized in that, wherein this leaded light component is a U-shaped member of this display surface of circle segment.

5. optical touch control display module according to claim 1 is characterized in that, wherein this leaded light component has the position on an angle inclined-plane of this bending place, and light changes direction of transfer through this angle inclined-plane.

6. optical touch control display module according to claim 5 is characterized in that, wherein this angle inclined-plane is a lead angle plane of this leaded light component.

7. optical touch control display module according to claim 5 is characterized in that, wherein folder one angle between the non-bending place of this angle inclined-plane and this leaded light component, and this angle is that 30 degree are to 60 degree.

8. optical touch control display module according to claim 7 is characterized in that, wherein this angle is 45 degree.

9. an optical touch control display module is applicable to a display module, and this display module has a display surface, it is characterized in that, this optical touch control module comprises:

One U-shaped leaded light component, this display surface of circle segment, this U-shaped leaded light component have two incidence surfaces at both ends, an at least one exiting surface and at least one angle inclined-plane of position in the bending place in the inboard respectively;

At least one light source is configured in by this incidence surface; And

At least one sensing component; Be configured in by this display surface; Wherein this light source emits beam towards this incidence surface, and before this exiting surface is sent to this display surface, to define a sensing space; When at least one touch object got into this sensing space, this sensing component sensed the light variation that this touch object causes.

10. optical touch control display module according to claim 9 is characterized in that, wherein the non-bending place of this angle inclined-plane and this leaded light component presss from both sides an angle, and this angle is that 30 degree are to 60 degree.

11. optical touch control display module according to claim 10 is characterized in that, wherein this angle is 45 degree.

12. optical touch control display module according to claim 9 is characterized in that, the structure that the wherein structure that is one of the forming of this U-shaped leaded light component, or at least two parts of serving as reasons is formed.

13. optical touch control display module according to claim 12 is characterized in that, wherein the composition surface that is any two parts, this angle inclined-plane.

14. optical touch control display module according to claim 10 is characterized in that, wherein this angle inclined-plane is the lead angle plane of this U-shaped leaded light component in the bending place.

15. an optical touch control display module is applicable to a display module, this display module has a display surface, it is characterized in that, this optical touch control module comprises:

At least one sensing component is configured in the periphery of this display surface;

One leaded light bar be configured in the periphery of this display surface, and this leaded light bar has at least one angle inclined-plane; And

One light source; Be configured in an end of this leaded light bar and emit beam towards this leaded light bar; And this position, angle inclined-plane presss from both sides an angle on the transfer path of light and with the transfer path of light, light is before this leaded light bar is sent to this display surface, to define a sensing space; When at least one touch object got into this sensing space, this sensing component sensed the light variation that this touch object causes.

16. optical touch control display module according to claim 15 is characterized in that, wherein angle is that 30 degree are to 60 degree.

17. optical touch control display module according to claim 16 is characterized in that, wherein angle is 45 degree.

18. optical touch control display module according to claim 15 is characterized in that, wherein this leaded light bar has an incidence surface and at least one exiting surface, and on the transfer path of light in this leaded light bar, this position, angle inclined-plane is between this incidence surface and this exiting surface.

19. optical touch control display module according to claim 15 is characterized in that, wherein this angle inclined-plane is connected between two adjacent exiting surfaces, and those exiting surfaces and this angle inclined-plane intersect in line.

20. optical touch control display module according to claim 15 is characterized in that, wherein this leaded light bar has at least one bending, and this position, angle inclined-plane is in this bending place.

21. optical touch control display module according to claim 20 is characterized in that, wherein this angle inclined-plane is the lead angle plane of position in this bending place.

22. optical touch control display module according to claim 20 is characterized in that, wherein this leaded light bar has the U-shaped profile.

23. optical touch control display module according to claim 20 is characterized in that, wherein this leaded light bar comprises interconnective at least two parts, and this position, angle inclined-plane is in the junction of those parts.

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