KR20120032354A

KR20120032354A - Pointing device for portable device and manufacture method thereof

Info

Publication number: KR20120032354A
Application number: KR1020100093954A
Authority: KR
Inventors: 안건준; 이광한
Original assignee: 크루셜텍 (주)
Priority date: 2010-09-28
Filing date: 2010-09-28
Publication date: 2012-04-05

Abstract

According to the present invention, a method of manufacturing a pointing device for generating and moving a cursor (or a pointer) on a screen through a user's finger movement is disclosed. A method of manufacturing a pointing device includes: wire bonding an image sensor to a substrate, and wire bonding the light source to the substrate using a flexible PCB; Applying a chimney structure to the upper part of the image sensor on the substrate and molding the epoxy molding compound to concave a portion where the light source unit is to be located; Mounting and fixing the light source unit by bending the flexible PC to the concave portion; Coupling the substrate and the housing. This manufacturing method simplifies the manufacturing process and precisely combines elements such as substrates, image sensors, and housings, thereby reducing defect rates and manufacturing costs.

Description

Pointing device for portable device and manufacture method

The present invention relates to a pointing device for a portable device. More particularly, the present invention relates to a method for manufacturing a pointing device using a laser diode, a light emitting diode, or the like as a light source.

In general, various electronic devices are being produced through the development of electronic communication technology, and these devices are increasingly emphasizing the convenience of the user and the beautifulness of the design. Highlighted by this trend is the diversification of input devices represented by keyboards or keypads.

According to this trend, pointing devices are widely used in portable terminal devices, and pointing devices include various types of devices such as optical joysticks, hall sensors, fingerprint sensors, and pressure sensors. In the terminal device, various menus or information are displayed on a screen, and a user may select such menus or information by using a pointing device.

In the case of using a laser diode (LD) as the light source among these pointing devices, since the direct angle is very narrow due to the light emitted from the laser diode, the user must move the finger accurately in the sensing area.

Therefore, when manufacturing a pointing device using such a laser diode, a very precise coupling is required due to the characteristics of the laser light source when the substrate, the image sensor, and the housing are combined.

For this reason, in the case of a pointing device using a laser diode light source, a study on a manufacturing method of accurately combining a substrate, an image sensor, and a housing is essential.

As described above, in the case of manufacturing a pointing device, precise coupling is required when combining elements such as a substrate, an image sensor, and a housing. There is a problem that can not properly detect the movement of the.

In addition, conventionally, the manufacturing process of the pointing device is a little complicated, which causes a problem in that the manufacturing cost increases.

The technical problem to be achieved by the present invention is to improve the conventional problems, to simplify the manufacturing process, to provide a method of manufacturing a pointing device to reduce the defect rate by precisely combining elements such as a substrate, an image sensor and a housing.

Pointing device manufacturing method according to a feature of the present invention for solving this problem,

Coupling an image sensor to a substrate, and coupling a light source unit to the substrate using a flexible PC;

Applying a chimney structure to the upper part of the image sensor on the substrate and molding the epoxy molding compound to concave a portion where the light source unit is to be located;

Mounting and fixing the light source unit by bending the flexible PC to the concave portion;

Coupling the substrate and the housing.

The housing is characterized in that the fixing portion for fixing the light source unit is formed.

Pointing device according to a feature of the present invention for solving this problem,

A substrate on which an image sensor is mounted;

A holder molded on the substrate with an epoxy molding compound and having a reflected light incident portion formed on the image sensor;

A light source unit fixed on the holder and connected to the substrate by a flexible PC;

It includes a housing having a fixing portion for fixing the light source unit, the housing is formed in a structure surrounding the holder and the substrate.

In an embodiment of the present invention, a method of manufacturing a pointing device can be provided that can reduce the defect rate and reduce the manufacturing cost by precisely combining elements such as a substrate, an image sensor, and a housing while simplifying a manufacturing process.

1 to 6 are diagrams illustrating a manufacturing method of a pointing device according to an embodiment of the present invention.
FIG. 7 is a cross-sectional view taken along the line AA ′ of FIG. 6.
FIG. 8 is a view illustrating a state in which a portion of the rest other than the housing is cut in FIG. 6.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

The pointing device is coupled to the portable device as an auxiliary input device, and the portable device includes all electronic devices capable of wired / wireless communication and capable of executing multimedia content, for example, an information terminal, a smartphone, and the like.

The pointing device manipulates a cursor (or pointer) on a screen output by the display unit of the portable device as an input auxiliary device, and also functions to select a function displayed on the screen as a left mouse button of the PC. The pointing device implements a pointing technique in a personal computer (PC) by creating and moving a cursor (or pointer) on a screen through a finger movement. That is, when the finger is placed on the pointing device and the finger is moved up and down and left and right, the cursor (or the pointer) moves according to the direction. Here, the pointing device may be applied with various techniques, for example, an optical joystick may be used.

Here, the pointing device may sense physical contact of the user's finger or light reflected by the user's finger. In addition, the pointing device may sense light reflected by the body part when the ball or other body part as well as the user's finger comes into physical contact or proximity.

Now, a method of manufacturing a pointing device according to an embodiment of the present invention will be described in detail with reference to the drawings.

1 to 6 are diagrams illustrating a manufacturing method of a pointing device according to an embodiment of the present invention.

Referring to FIG. 1, the image sensor 130 is wire bonded to the substrate 140, and the light source unit 110 is wire bonded to the substrate 140 using the flexible PC 120.

Then, the holder 150 is formed by molding a mold fixed with an epoxy molding compound on the substrate 140. Since it is well known in the art, detailed description thereof will be omitted. In this case, a chimney structure is applied to the image sensor 130 to generate the reflected light incident part 151. 2, the reflected light incident part 151 is generated to generate a light path to the image sensor 130, and may not be completely physically drilled by making the epoxy transparent as necessary. In addition, the concave portion 152 is created by molding so that the portion where the light source unit 110 is to be concave.

Next, as illustrated in FIG. 3, the flexible PCB 120 is bent on the concave portion 152 to seat the light source 110 and fix the light source 110 by a double-sided tape or bonding method.

Then, the substrate 140 and the housing 160 having the holder 150 shown in FIG. 4 are combined. At this time, the fixing parts 161 and 162 of the housing 160 are coupled as shown in FIG. 5 to fix the light source of the light source unit 110 well.

Finally, a pointing device of the type shown in FIG. 6 is completed.

Since the holder 150 is formed by molding with an epoxy molding compound in the above process, it replaces the holder in the form of an existing instrument, and simplifies the process by eliminating cumulative tolerances.

In addition, in the above process, since the light source unit 110 is coupled to the holder 150 using the flexible PC 120, the process becomes simple and convenient. In addition, the fixing parts 161 and 162 on the bottom surface of the housing 160 may fix the light source of the light source unit 110 so that the assembly error is small and the defective rate may be reduced.

The structure of the pointing device formed by molding with an epoxy molding compound by the above process will be described below.

7 is a cross-sectional view taken along the line AA ′ of FIG. 6;

FIG. 8 is a view illustrating a state in which a portion of the rest other than the housing is cut in FIG. 6.

Referring to Figure 7 or 8, the pointing device according to an embodiment of the present invention,

A substrate 140 on which the image sensor 130 is mounted; A holder 150 molded on the substrate 140 with an epoxy molding compound and having a reflected light incident part 151 formed on the image sensor 130; A light source unit 110 fixed to the holder 150 and connected to the substrate by a flexible PC; And a housing 160 having fixing parts 161 and 162 for fixing the light source part 110, and having a structure surrounding the holder 150 and the substrate 140.

The operation of the pointing device having such a structure will be briefly described as follows.

The light output from the light source unit 110 is emitted through the housing 160 and reflected on a body part such as a finger to enter the reflected light incident part 151.

The image sensor 140 receives the light received through the reflected light incident part 151 to determine the user's body movement.

Since the pointing device is fixedly coupled to the light source position of the light source unit 110 by the housing 160, the radiation angle may always be accurate, thereby reducing the product failure rate.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims

Coupling an image sensor to a substrate, and coupling a light source unit to the substrate using a flexible PC;
Applying a chimney structure to the upper part of the image sensor on the substrate and molding the epoxy molding compound to concave a portion where the light source unit is to be located;
Mounting and fixing the light source unit by bending the flexible PC to the concave portion;
The method of manufacturing a pointing device comprising the step of coupling the substrate and the housing.

The method of claim 1,
The housing is provided with a fixing portion for fixing the light source portion, characterized in that the manufacturing method of the pointing device.