CN201876827U - A touch-sensitive control device that controls a pointer displayed on the screen - Google Patents

Abstract

The contact type sensing control device for controlling a pointer to display on a screen comprises an optical component, an incident light source for projecting light rays by the optical component and a displacement sensor for receiving emergent light rays of the optical component; the optical component is a lens unit with total internal reflection characteristic and is provided with a light source area, and an incident light source enters the optical component from the light source area; the lower surface of the optical component is provided with a gain structure, the reflectivity and the refractive index of light rays inside the optical component are improved, the light utilization rate is increased, and the light rays are finally reflected to a contact surface on the upper surface of the optical component for placing the finger tip of a user, a brightening microstructure array is arranged on the contact surface, and the reflected light rays at the finger tip placing position are brightened and guided to a light-emitting surface on the lower surface of the optical component to be emitted to the displacement sensor. The utility model has the effects of strengthening light reflection and refraction, increasing light utilization rate, strengthening light reflection brightness of fingertip positions and the like, and can improve the sensitivity of the control device.

Description

A touch-sensitive control device that controls a pointer displayed on the screen

technical field

The utility model relates to a device for controlling a pointer to be displayed on a screen, more specifically, the utility model relates to a contact-type induction control device utilizing optical principles.

Background technique

A touch-sensitive control device that uses optical principles to control a pointer displayed on a screen is disclosed in US Patent No. US6621483 (hereinafter referred to as the 483 case). The application describes that the control device has an optical component, the upper surface of the optical component is an image surface for the fingertips of the user to place, a light source is projected from the bottom side of the optical component to the image surface to generate a reflected image, and a lens The reflection image is received from the bottom of the optical component, and the reflection image is reflected to a displacement sensor. The displacement sensor converts the reflected image into digital information and transmits it to a controller. The controller uses the digital information to present the position of the fingertip on the image surface corresponding to the coordinate position of the pointer of the display.

The optical components used in Case 483 use pure spherical curvature to control the refraction of the light source and the reflection of the image, without any additional related design that can enhance the effect of reflection and refraction. Based on this, the optical component must have a longitudinal height that can meet the requirements of light focusing and diffusion. It can be inferred from the first figure of the 483 case that the vertical height of the optical component is about several times the thickness of the user's fingertips. It is used in thin and light portable electronic products. In addition, the optical components of the 483 case do not have any related design that can enhance the reflection and refraction effects. If the light reflection and refraction effects are not good, the sensitivity of the displacement sensor will be weakened. The position of the fingertip on the image surface and the display The coordinate position of the pointer cannot be displayed accurately.

Contents of the invention

The purpose of this utility model is to provide a kind of touch-sensitive control device that utilizes the principle of optics to control a pointer to display on the screen. The longitudinal length of the optical component of the control device of the utility model is obviously smaller than the optical component of the prior art, so the present invention Compared with the prior art, the control device of the utility model is closer to realizing flatness and thinning, and is suitable for application in light and thin portable electronic products.

The technical solution for reaching the above object of the utility model is:

A touch-sensitive control device for controlling a pointer displayed on a screen, including an optical component, a pair of incident light sources for projecting light from the optical component, and a displacement sensor for receiving light emitted by the optical component, characterized in that the optical component As a lens unit with total internal reflection properties, the optical assembly includes:

a light source area from which incident light sources enter the optical assembly;

A gain structure adjacent to the light source area and located on the lower surface of the optical component, the gain structure increases the reflectivity and refractive index of the light inside the optical component, and finally reflects to the upper surface of the optical component for the user’s finger a contact surface placed on the fingertip;

A brightening microstructure array adjacent to the light source area and located on the contact surface; the brightening microstructure array increases the brightness of the reflected light at the position where the fingertip is placed, and guides it to the lower surface of the optical component One of the light-emitting surfaces emits to the displacement sensor.

further,

The light source area is arranged at any one of the top, bottom, and side of the optical component.

The light source area has a light source guiding surface adjacent to and opposite to the light source, and the light source guiding surface is located at any one of the top, bottom and side of the light source area.

The light source guiding surface is any one or a combination of a plane, a spherical surface with a predetermined curvature, and a prism pattern arranged periodically or non-periodically with enhanced refraction and reflection effects.

The gain structure is composed of any one or a combination of planes, spherical surfaces with predetermined curvature, and periodic and non-periodic arrayed prism patterns.

The gain structure is integrally formed on the surface of the optical component.

The sectional shape of the prism pattern is any one of semicircle, cone, pyramid and rhombus.

The gain structure is combined on the surface of the optical component by means of adhesion technology.

The brightness-enhancing microstructure array is composed of any one or combination of planes, spherical surfaces with predetermined curvatures, and periodic and non-periodic arrayed prism patterns.

The sectional shape of the prism pattern is any one of semicircle, cone, pyramid and rhombus.

The flat and thinned optical components used in the control device of the present utility model have a gain structure that enhances reflectivity and refractive index, and have a microstructure that increases brightness on the contact surface for the user's fingertips to place. Based on this, The control device of the utility model has the effects of strengthening light reflection and refraction, increasing light utilization rate, and strengthening light reflection brightness at the fingertip position, and can increase the sensitivity of the control device.

Description of drawings

FIG. 1 is a schematic perspective view of the three-dimensional appearance of the touch sensor control device of the present invention, wherein the incident light source is located below the optical component.

Fig. 2 is a side view of the embodiment shown in Fig. 2, and schematically describes the reflection and refraction of light.

FIG. 3 is a schematic perspective view of the three-dimensional appearance of the touch sensor control device of the present invention, wherein the incident light source is located at the side of the optical component.

Fig. 4 is a side view of the embodiment of Fig. 3, and schematically describes the reflection and refraction of light.

Explanation of reference signs

10. Optical components 11. Light source area 12. Light source guide surface 13. Light exit surface 20. Gain structure

30. Contact surface 40. Brightness-enhancing microstructure array 50. Incident light source 60. Displacement sensor

Detailed ways

The technical solution of the utility model will be described in further detail below in conjunction with specific embodiments. Various objects in the embodiments are drawn in proportions, sizes, deformations or displacements suitable for illustration, rather than drawn in proportion to actual components.

As shown in Figures 1 to 4, the touch sensor control device of the present invention includes an optical assembly 10, an incident light source 50 and a displacement sensor 60. The incident light source 50 and the displacement sensor 60 are well-known technologies, and their operating principles and structural aspects are not the object of the present invention, so details are not repeated here.

The optical component 10 is a lens unit with total internal reflection characteristics, which has a light source area 11, a gain structure 20 for enhancing reflection and refraction effects, a contact surface 30 for the fingertip of a user to touch, and a strengthening contact surface 30 Brightness-enhancing microstructure array 40 for light reflection brightness.

The light source area 11 can be arranged at any position above, below, or on the side of the lens unit, and has a light source guiding surface 12, and the light source guiding surface 12 can be located on the top, below, or at the side of the light source area 11 any position in . The incident light source 50 is disposed adjacent to the light source guiding surface 12 , the light is directly incident on the light source guiding surface 12 and undergoes total internal reflection inside the optical component 10 . The light source guiding surface 12 can be a plane, a spherical surface with a predetermined curvature, or a prism pattern arranged periodically or non-periodically to enhance refraction and reflection effects. Incident light sources include but are not limited to light emitting diodes (LEDs) and laser light.

The gain structure 20 and the contact surface 30 are two opposite surfaces of the optical component 10 , the gain structure 20 is located on the lower surface of the optical component 10 , and the contact surface 30 is located on the upper surface of the optical component 10 . The gain structure 20 and the contact surface 30 have a distance S due to the thickness of the optical component 10 of the transparent medium. The gain structure 20 is composed of a plane, a spherical surface with a predetermined curvature, or a periodic or non-periodic array of prism patterns. The cross-sectional shape of the prism pattern includes but not limited to semicircular, conical, pyramidal, rhombus and other shapes. The gain structure 20 is integrally formed on the surface of the optical component 10 , or the processed gain structure 20 is combined with the surface of the optical component 10 by means of adhesion. Each prism pattern has a set height, period length, angle or radius of curvature.

The brightness-enhancing microstructure array 40 is composed of a plane, a spherical surface with a predetermined curvature, or a periodic or non-periodical array of prism patterns. The cross-sectional shape of the prism pattern includes, but is not limited to, any shape. The brightness-enhancing microstructure array 40 can be integrally formed on the surface of the optical component 10 , or the processed brightness-enhancing microstructure array 40 can be bonded to the surface of the optical component 10 by means of adhesion. Each prism pattern has a set height, period length, angle or radius of curvature.

When the incident light source 50 enters from the light source guide surface 12 of the light source area 11, it undergoes total internal reflection inside the optical component, and finally reflects to the contact surface 30. The gain structure 20 strengthens the internal reflection and refraction effects of the optical component 10 , increasing the utilization rate of light, so that the light can be fully projected to the contact surface 30 finally. Furthermore, the brightness-enhancing microstructure array 40 on the contact surface 30 can guide the reflected light at the position of the fingertip to a special direction, and produce effects such as concentrating light and increasing light brightness. The lower surface of the optical component 10 has a light-emitting surface 13 , and the brightness-enhancing microstructure array 40 guides the reflected light at the fingertip to the light-emitting surface 13 . The light-emitting surface 13 has a curvature of light-gathering effect, so as to concentrate the light to the displacement sensor 60 .

The optical component 10 of the present invention has the characteristic of total internal reflection, plus the gain structure 20 increases the reflectivity and refractive index of the light inside the optical component 10, and the microstructure array 40 guides the light to the light-emitting surface 13 to generate concentrating light. light, increase light brightness and other effects, the light utilization rate of the optical assembly 10 of the present utility model is obviously better than the prior art, in addition, based on the application of the gain structure 20 and the brightening microstructure array 40, the optical assembly 10 The longitudinal height of the optical component 10 is greatly reduced, making the optical component 10 appear flat and thin, which is suitable for application in light and thin portable electronic products. Furthermore, based on the application of the gain structure 20 and the brightening microstructure array 40, the light sensitivity of the optical component 10 can be improved, so that the displacement sensor can exert its due sensing sensitivity. Through the signal conversion of the control unit coupled with the displacement sensor, the position of the fingertip on the contact surface and the coordinate position of the pointer of the display can be accurately and correspondingly displayed.

Although the utility model is described with a preferred embodiment, those skilled in the art can make various changes without departing from the spirit and scope of the present case. The above-mentioned embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made without violating the spirit of the utility model shall be deemed to fall within the protection scope of the utility model.

Claims (10)

1. control the contact induction controller that a pointer shows on screen, comprise an optical module, the incident light source of a pair of described optical module throw light, and the displacement transducer that receives the emergent light of described optical module, it is characterized in that described optical module is the lens unit with total internal reflection characteristic, comprises:

One light source region, described incident light source enters the described optical module from described light source region;

One adjoins described light source region and is positioned at the gaining structure of described optical module lower surface, described gaining structure is promoted the reflectivity and the refractive index of described optical module internal light, and finally reflexes to the surface of contact that described optical module upper surface is placed for user's finger fingertip;

One adjoins described light source region and is positioned at the blast micro structure array of described surface of contact; Described blast micro structure array increases brightness with the reflection ray of described finger fingertip placement location, and an exiting surface outgoing that is directed to described optical module lower surface is to described displacement transducer.

2. the contact induction controller that control one pointer as claimed in claim 1 shows on screen is characterized in that: described light source region be arranged at described optical module top, below, and side in arbitrary position.

3. the contact induction controller that control one pointer as claimed in claim 2 shows on screen, it is characterized in that: described light source region has one and adjoins relative light source guiding face with described light source, and described light source guiding face is arranged in the arbitrary position of top, below and side of described light source region.

4. the contact induction controller that control one pointer as claimed in claim 3 shows on screen is characterized in that: described light source guiding face be plane, tool predetermined curvature sphere, and tool add in the prism pattern that strong refraction and reflecting effect are cycle or no periodic array any one or its combination.

5. as claim 1 a contact induction controller that described control one pointer shows on screen, it is characterized in that: described gaining structure is made of any one or its combination institute in the prism pattern of the sphere of plane, tool predetermined curvature and cycle, no periodic array.

6. the contact induction controller that control one pointer as claimed in claim 5 shows on screen is characterized in that: described gaining structure is the surface that is shaped in described optical module.

7. the contact induction controller that control one pointer as claimed in claim 5 shows on screen is characterized in that: the section configuration of described prism pattern be in semicircle, taper shape, pyramid, the rhombus any one.

8. the contact induction controller that control one pointer as claimed in claim 5 shows on screen is characterized in that: described gaining structure is the surface that is incorporated into described optical module with the technological means of adhering to.

9. the contact induction controller that control one pointer as claimed in claim 1 shows on screen is characterized in that: described blast micro structure array is made of any one or its combination institute in the prism pattern of the sphere of plane, tool predetermined curvature and cycle, no periodic array.

10. the contact induction controller that control one pointer as claimed in claim 9 shows on screen is characterized in that: the section configuration of described prism pattern be semicircle, taper shape, pyramid, and rhombus in any one.

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