KR101611454B1 - camera module with pointer function - Google Patents

Abstract

And a camera module including a pointer function. The camera module includes: a lens; a laser light generating unit positioned at a distance from the lens to generate and project laser light; a filter unit located under the lens to filter light in an infrared region from the light transmitted through the lens; And an image sensor for converting the light filtered by the infrared region into an electrical signal.

Camera module, pointer, electrical signal, laser light

Description

Camera module with pointer function {camera module with pointer function}

The present invention relates to a camera module, and more particularly, to a camera module including a pointer function.

As the number of presentations and seminars using large screens and projectors increases, the use of laser pointers has become commonplace. The laser pointer is a widely used device for specifying a specific portion on a screen by taking advantage of the excellent light focusing property among the characteristics of the laser.

Because the laser pointer should be easy to carry, it is mostly small in size. However, when the laser pointers are used in important tasks such as meetings, presentations and business trips, there are restrictions on presentation and reporting.

If there is no laser pointer owned by the presenter and the laser pointer of another person is used, there is a disadvantage that the feeling of grip is different from usual and the convenience of the presenter is lowered. Recently, although the use of laser pointers has increased, there are limitations on the way to carry them.

SUMMARY OF THE INVENTION The present invention provides a camera module including a pointer function that allows a user to carry a pointer at all times by carrying various products equipped with camera modules such as a portable telephone, a notebook computer, and a personal digital assistant .

According to an aspect of the present invention, there is provided a liquid crystal display device comprising: a lens; a laser light generating unit positioned at a distance from the lens to generate and project laser light; An infrared ray filter for reflecting the laser light and projecting the laser light to the outside through the lens, and an image sensor for converting the light filtered through the infrared ray region into an electrical signal.

delete

Portable phones, notebook computers, personal digital assistants (PDAs), and various other products equipped with camera modules are carried around, so that the user can carry the pointer at all times. It is possible to project a laser beam having high intensity at the best reflectance without expensive reflective coating.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and a duplicate description thereof will be omitted.

1 is a cross-sectional view schematically showing an example of a camera module.

1, the camera module 10 includes a lens 11, an infrared filter 12, an image sensor 13, a bonding wire 14, a printed circuit board 15, a barrel 16, and a holder 17 ).

The camera module 10 includes a lens 11 and an infrared sensor 12 disposed under the lens 11 and an image sensor 13 and an image sensor 13 disposed in parallel under the infrared sensor 12. [ And a printed circuit board (15) electrically connected to the image sensor (13) by a bonding wire (14). The barrel 16 is mounted on the lens 11 and functions to protect the lens 11 and the holder 17 serves as an outer housing of the lens 11. [

The camera module 10 receives the optical image of the subject from the lens 11 and transmits it to the infrared filter 12. The infrared filter 12 blocks the infrared rays from the received light image and then irradiates the image sensor 13 with the infrared light. The image sensor 13 converts the irradiated light image into an electrical signal.

2 is a view showing an example of a camera module including a pointer function according to the present embodiment.

2, the camera module 100 according to the present embodiment includes a lens 110, an infrared ray filter 120, a laser light generator 130, an image sensor 140, a bonding wire 150, And includes a substrate 160 and a barrel 170.

The camera module 100 includes a lens 110, an infrared filter 120 positioned below the lens 110 at a predetermined angle with respect to a horizontal plane, an image sensor 140 positioned below the infrared filter 120, A printed circuit board 160 electrically connected to the image sensor 140 by a bonding wire 150 in contact with a rear surface of the infrared light source 140 and a laser light generator 130 spaced apart from the infrared light filter 120, . The barrel 170 is mounted on the lens 110 and functions to protect the lens 110. The infrared filter 120, the image sensor 140, the printed circuit board 160, the barrel 170, and the laser light generating unit 130 may be included in an outer housing (not shown) of the camera module 100.

The camera module 100 receives the optical image of the subject from the lens 110 and transmits the received optical image to the infrared filter 120. The infrared filter 120 blocks the infrared rays from the received light image and then irradiates the image sensor 140 with the infrared light. The image sensor 140 converts the irradiated light image into an electrical image signal. Here, the image sensor 140 may be a charge coupled device (CCD) image sensor or a complimentary metal-oxide semiconductor (CMOS) image sensor. The camera module 100 corrects the distorted color according to the intrinsic wavelength of the light source according to the use environment of the camera or performs black level conversion (BLC) or color interpolation And an image signal processor (not shown) for correcting the electrical image signal.

The laser light generating unit 130 generates laser light and projects it to the outside. The infrared filter 120 is spaced apart from the laser light generating part 130 and reflects the laser light generated by the laser light generating part 130 and projects the laser light to the outside through the lens 110. The infrared filter 120 may be positioned at an angle (?) According to the following equation (1) with respect to the horizontal plane.

Where n is the refractive index of the infrared filter. When the incident angle of the laser beam to the infrared filter 120 is equal to the angle? Of Equation 1, the reflected laser beam and the refracted laser beam become perpendicular to each other, and the reflected laser beam becomes completely polarized.

Here, the incident laser light may be unpolarized light or a completely polarized light having a polarization ratio of 100%, or may be a partially polarized light having a polarization ratio of 100% or less.

The laser light is incident on the infrared ray filter 120 at an angle of θ according to Equation 1 and is reflected at an angle θ to be incident on the optical axis of the lens 110 , 111).

For example, in the case of using D263 which is double-side polished glass as the infrared ray filter 120, the refractive index of D263 is 1.53, and the angle? According to Equation 1 becomes 56.9 占. When D263 is inclined by 56.9 degrees with respect to the horizontal plane, the reflectivity of the reflected laser light is the best, and the laser light is projected through the lens 110. [ It is possible to project laser light having high intensity at the best reflectivity to the outside of the camera module 100. [ Depending on the material of the infrared filter 120, the angle [theta] tilted with respect to the horizontal plane may vary.

When the incident laser light is unpolarized light, the laser light reflected by the laser light incident on the infrared filter 120 at an angle (?) According to Equation (1) Polarized (s-polarized) component and all of the s-polarized component can be reflected.

In addition to the infrared filter 120, various components capable of reflecting light from the camera module can reflect the laser light generated in the laser light generating part 130 and project the laser light to the outside through the lens. For example, the flat plate lens among the lenses of the camera module can reflect the laser light and project it out through the lens. Various components that can reflect the laser light generated in the laser light generating unit 130 in the camera module may be inclined by an angle? Of Equation (1) according to the material with respect to the horizontal plane.

3 is a view illustrating a laser light generating unit according to the present embodiment.

Referring to FIG. 3, the laser light generator 130 includes a controller 131, a laser diode 133, and a lens 135.

The control unit 131 controls the laser diode 133 to generate laser light using a power source supplied to the camera module 100 when a signal related to whether or not laser light is generated from the outside is input, When the off operation signal of the unit 130 is inputted, control is performed to stop the generation of the laser light.

The laser diode 133 generates a laser beam under the control of the control unit 131 and sends it to the lens 135. Here, a laser diode which generates a laser by flowing a current to the diode is used as a source of the laser light, but the source of the laser light is not limited thereto. For example, solid-state lasers using artificial ruby, glass, YAG (yttrium, aluminum, garnet) crystals mixed with chromium ions, or mixed gases of helium and neon, argon, krypton, carbon dioxide, helium and nitrogen Such as a gas laser, which uses a mixed gas of a rare earth element as a laser generating material.

The lens 135 focuses the laser light, converts it into parallel light, and projects it to the outside.

delete

delete

delete

delete

As used in this embodiment, the term " portion " refers to a hardware component such as software or an FPGA (field-programmable gate array) or ASIC, and 'part' performs certain roles. However, 'part' is not meant to be limited to software or hardware. &Quot; to " may be configured to reside on an addressable storage medium and may be configured to play one or more processors. Thus, by way of example, 'parts' may refer to components such as software components, object-oriented software components, class components and task components, and processes, functions, , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided in the components and components may be further combined with a smaller number of components and components or further components and components. In addition, the components and components may be implemented to play back one or more CPUs in a device or a secure multimedia card.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention. You will understand. Accordingly, it is intended that the present invention covers all embodiments falling within the scope of the following claims, rather than being limited to the above-described embodiments.

1 is a cross-sectional view schematically showing an example of a camera module.

2 is a view showing an example of a camera module including a pointer function according to the present embodiment.

3 is a view illustrating a laser light generating unit according to the present embodiment.

4 is a view showing another example of a camera module including a pointer function according to the present embodiment.

DESCRIPTION OF THE REFERENCE SYMBOLS

100: camera module 110: lens

120: infrared ray filter 130:

140: image sensor 150: bonding wire

160: printed circuit board 140: barrel

Claims (8)

lens; An image sensor for converting the light passing through the lens into an electrical signal; A laser light generating unit for generating a laser light and projecting the laser light while being spaced apart from the lens; Wherein the optical system is disposed between the lens and the image sensor and filters light in the infrared region before the light transmitted through the lens reaches the image sensor, reflects the laser light emitted from the laser light generating unit, A camera module including a pointer function including an infrared filter for projecting an image onto a subject. The method according to claim 1, The infrared filter Wherein the camera module is tilted with respect to the horizontal plane by an angle?

Here, n represents the refractive index of the infrared filter. The method according to claim 1, The laser light generating unit A laser source portion for generating the laser light; And a laser light generation unit lens for converging the laser light and projecting the laser light toward the infrared filter. The method of claim 3, Wherein the laser source portion includes a laser diode for generating a laser by flowing a current to the diode. delete delete delete The method according to claim 1, And an image signal processor for correcting the electrical signal, Wherein the image signal processor corrects distorted colors or performs black level conversion (BLC) or color interpolation according to intrinsic wavelengths of the light source to correct the electrical signals.

Images