KR20070090371A - Mobile terminal with a removable projector - Google Patents

Abstract

A mobile terminal equipped with a detachable projector is provided to comprise the small-sized projector on a side of the terminal, thereby magnifically projecting an image realized on a display device of the terminal to the outside. A mobile terminal(101) equipped with a detachable small-sized projector(110) comprises as follows. A terminal unit(103) consists of a detaching/attaching unit(120), an image signal output terminal(108) for transmitting an image signal to the projector(110), a display device(105) for displaying an image, and an input unit(106) such as a keypad for inputting information. The projector(110) integrates by combining with the terminal unit(103) through a detaching/attaching unit(120), or duplicates by separating the detaching/attaching unit(120), and realizes a large-sized image by projecting the image on a screen through a projection lens(115).

Description

Mobile terminal with a removable projector

1 is a perspective view showing a mobile phone as a general mobile terminal.

2 to 5 is a perspective view of a small projector detachable mobile terminal classified according to the combination structure of the terminal and the projector of the present invention.

6 is a projector driving block diagram of a mobile terminal according to a first embodiment of the present invention.

FIG. 7 is a diagram schematically showing the positional relationship between a light source system, an optical system, and a liquid crystal display panel in a small projector of a mobile terminal having a detachable small projector according to a first embodiment of the present invention;

8 is an exploded perspective view of a liquid crystal panel provided at the same time or in a small projector forming an image display device of the present invention;

9 is a projector driving block diagram of a mobile terminal according to a second embodiment of the present invention;

FIG. 10 is a diagram schematically illustrating the positional relationship between a light source system, an optical system, and a liquid crystal panel in a small projector of a mobile terminal having a detachable small projector according to a second embodiment of the present invention; FIG.

11 is a block diagram of a projector driving a mobile terminal according to a third embodiment of the present invention.

FIG. 12 is a diagram schematically illustrating the positional relationship between a light source system, an optical system, and a liquid crystal panel in a small projector of a mobile terminal having a detachable small projector according to a third embodiment of the present invention; FIG.

<Description of the symbols for the main parts of the drawings>

101: mobile terminal with a removable small projector

103: mobile terminal

105: image display device

106: input means

108: image signal output terminal

110: small projector

113: image signal input terminal

115: projection lens

120: desorption means

The present invention relates to a mobile terminal, and more particularly, a mobile terminal comprising a main unit having a keypad for operation such as a mobile phone, a laptop or a PDA and a display unit having a liquid crystal panel, and a detachable projector on a side thereof. The present invention relates to a mobile terminal having a detachable projector which can enlarge and project an image displayed on the display screen to the outside.

Recently, the International Mobile Telecommunication 2000 (IMT 2000) and the Digital Multimedia Broadcasting (DMB) service using satellite or terrestrial waves have been commercialized.

Since IMT 2000 and DMB (particularly satellite DMB) utilize low-orbit satellites that are to be spread over the earth, users can use land, sea, and public transportation without any restrictions on land, sea, and air. One mobile terminal is expected to enjoy not only voice calls but also various high-speed wireless communication services such as moving pictures and graphics.

As a result, research and development of mobile terminals are being carried out rapidly by individuals, and mobile terminals for information and communication media such as notebooks, laptop computers or personal digital assistants have not been completely developed. It is used as an unfamiliar electronic data processing system (EDPS), and mobile terminals with specialized uses such as mobile phones and navigation systems are also widely used in our daily lives.

In addition, thanks to the recent remarkable development of electronic communication technology, the functions of these various mobile terminals are rapidly improving. For example, a mobile phone has recently been equipped with a digital camera as well as an Internet connection to take pictures and videos. Wireless transmission is possible, and thanks to the expansion of memory, products with small database functions such as schedule management and document editing / saving are being released.

Based on this, the main development trend of the mobile terminal is based on the size of the light and small terminal, which is easy to carry in response to the customer's demand, but the rich user interface (e.g. The development of high quality A / V content (Audio / Video content) has emerged as a major challenge.Efforts are being made to reduce the overall size and expand the size of the display image as much as possible, while at the same time expanding the range of use of mobile terminals. This is constantly going on.

On the other hand, the display screen of such a mobile terminal is usually composed of a liquid crystal display device (LCD), which provides excellent contrast and color reproducibility compared to other flat panel display devices and enables mass production. At the same time, through continuous technological developments, it has demonstrated the ability to implement images comparable to the existing cathode ray tube (CRT).

Such a liquid crystal display device simply uses optical anisotropy and polarization property of liquid crystal. As is well known, liquid crystal has a thin and long molecular structure and is oriented in an optical anisotropy and an electric field arranged in an array. In this case, the orientation of the molecular sequence changes according to its size.

The liquid crystal display device has a configuration in which a pair of transparent insulating substrates on which a field generating electrode is formed are bonded to each other with the liquid crystal layer interposed therebetween, and the arrangement direction of liquid crystal molecules is changed by changing the electric field between the two field generating electrodes. It is artificially adjusted and displays various images through the change of transmittance of light.

Recently, in particular, active pixels having one-to-one switching elements such as thin-film transistors (TFTs) for controlling pixels individually, after arranging pixels, which are basic units of image expression, in a matrix manner. Active Matrix liquid crystal displays have been in the spotlight for their excellent resolution and video performance.

1 is a perspective view of a mobile phone as an example of a mobile terminal having a general liquid crystal display as a display screen, and a product called a "folder type" is shown.

Such a folding type mobile phone realizes a wider display screen in contrast to the conventional so-called 'flip type' in which a main body having a keypad for operation and a display having a liquid crystal display are present on a single plane. In the structure, the main body portion 2 having the input means 4 such as a keypad for inputting information and the display portion 6 having the liquid crystal display device 8 can be connected to the hinge 10. It has a folding configuration which is folded or unfolded as a parameter.

Therefore, most of the display unit 6 having an area substantially the same as that of the main body 2 can be used as a display screen, and there is an advantage in that they can be folded and held in an area volume of the main body 2 or the display unit 6. .

However, the mobile terminal such as the above-described mobile phone has a disadvantage in that it still does not satisfy the customer demand for the execution of the current video content, the display screen is one liquid crystal display device 8 having a limited size of less than the display unit (6) ), The image is too small to watch a movie or moving picture is detrimental to the situation.

In view of the fact that the display screen of the current mobile terminal is too narrow, the present invention intends to solve the size limitation of the image implementation by the projection function, and to provide a concrete method for this.

Furthermore, in the present invention, it is another object to have the characteristics of the light and thin terminal of the mobile terminal by being detachable from the mobile terminal so that the small projector can be carried only when necessary.

According to an aspect of the present invention, there is provided a display unit including a display device, a terminal coupled to the terminal, and a main unit including an input means for manipulation and an image signal output terminal at one side thereof; Provided is a mobile terminal having a detachable projector including an image information input terminal connected to the image information output terminal and receiving image information, and a projector coupled to or separated by the terminal and detachable means.

At this time, the image signal output terminal and the image signal input terminal itself is formed in the form of recesses and convex portions, it is characterized in that the desorption means itself by directly connecting the two terminals.

In addition, the detachable means is characterized in that the rotation is rotated after the terminal and the projector is coupled, in this case characterized in that the image signal output terminal and the image signal input terminal is connected via a connecting means.

In addition, the projection lens is a short focal lens and can display an image having a size of 20 inches or less on a flat surface at a projection distance of 1 m or less on a flat surface.

The projector may further include a liquid crystal panel that receives image information inputted through the image information input terminal unit, and displays an image, a power source unit, a light source system that emits light by receiving power from the power source unit, and light emitted from the light source system. An optical system and a projection lens to which light passing through the optical system and the liquid crystal panel is incident, wherein the liquid crystal panel includes red, green, and blue color filter layers. to be.

The projector may further include a data signal input terminal connected to the image signal output terminal to receive image information, and a data split classifying image information input to the image information input terminal unit into first to third group image data. And first to third liquid crystal panels for inputting the first to third group data, respectively, to display red, green, and blue images, a power supply unit, and a light source system to emit power by receiving power from the power supply unit; And an optical system for improving parallelism of light emitted from the light source system, first and second beam splitters for splitting the light passing through the optical system into first, second and third light beams; The dichroic prism which adds the said 1st, 2nd and 3rd light ray incident in the direction, and passes in one direction, and the light which passed through the dichroic prism is incident. And a four-lens, wherein the projector further comprises first and second mirrors to divert the first, second and third beams divided by the first and second beam splitters to different side portions of the dichroic prism. In this case, the first to the third liquid crystal panel is characterized in that only the color filter layer of any one color among the red, green and blue color filter layer is formed.

In addition, the light source system is composed of a plurality of white chip LED, wherein the white chip LED is characterized in that each luminous efficiency is at least 70lm / W or more.

The projector may further include a data signal input terminal connected to the image signal output terminal to receive image information, and a data split classifying image information input to the image information input terminal unit into first to third group image data. And first to third liquid crystal panels for inputting the first to third group data, respectively, to display an image, a power supply unit, and a power supply unit, respectively, to emit red, green, and blue light. 1st to 3rd optical system and the 1st to 3rd optical system which improve the parallel property of the 1st, 2nd and 3rd light beams which came out from the said 1st-3rd light source system, and incidence in a different direction A dichroic prism for summing the first, second and third light beams and passing in one direction, and a projection lens to which light emitted through the dichroic prism is incident; The projector may further include first and second mirrors to inject the first, second and third light beams passing through the first to third optical systems to different side portions of the dichroic prism. In this case, all of the first to third liquid crystal panels are formed without a color filter layer. In this case, the first to third light source systems are each formed of a plurality of chip LEDs emitting red, green, and blue light, respectively.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The most characteristic part of the present invention is that a mobile terminal and a small projector detachable therefrom are essential components. Therefore, a display screen larger than the display screen in the mobile terminal is projected by projecting an image implemented as a small display screen of the mobile terminal through IMT200 or DMB to a flat surface or a screen through a small projector integrated with the mobile terminal. It is the most characteristic that it can be seen through, and furthermore, the compact projector is to be separated from the mobile terminal to be portable to realize the purpose of the mobile terminal only to achieve the characteristics of the light and small It has become a feature of the invention.

Various embodiments of the present invention to be described hereinafter have been described for convenience when applied to a mobile phone among various types of mobile terminals.

First, a mobile terminal having a detachable small projector according to the present invention will be described with reference to the drawings.

 2 to 5 are perspective views of a small projector detachable mobile terminal classified according to a coupling structure of a terminal and a projector of the present invention. In this case, the same reference numerals are given to the same components.

As shown, the mobile terminal 101 having a detachable small projector 110 according to the present invention is an image signal output terminal 108 for transmitting a detachable means 120 and an image signal to a projector or the like on one side. And a mobile terminal 103 having components such as a display device 105 for displaying an image, an input means 106 such as a keypad for inputting information, and the like. It is composed of a small projector 110 which is integrated by being combined or dualized by releasing the detachable means 120 and projecting an image on a screen or the like through the projection lens 115 to realize a large size image.

In this case, the detachable means 120 of the mobile terminal 103 and the small projector 110 has recesses and convex portions on one side of the mobile terminal 103 and the small projector 110, and then the recesses and convex portions are combined. The concave portion and the portion connected to the iron portion may be configured in a hinge type in which the small projector 110 may be rotated (see FIGS. 4 and 5), or the detachable means 120 may be fixed. It may be a structure that can be detachable only, not simply rotated (see FIGS. 2 and 3).

As shown in Fig. 2 and 3, in the case of the configuration having a fixed detachable means 120 capable of detachable attachment and detachment of the mobile terminal 103 and the small projector 110, as shown in Fig. 2, the detachable means 120 itself consists of an image signal output terminal 108 and an image signal input terminal 113 itself for transmitting an image signal, or as shown in FIG. Connection means 130 having an end portion in which the image signal output terminal 108 provided in the mobile terminal 103 and the image signal input terminal 113 provided in the small projector 110 are respectively coupled to these terminals. It may be a structure connected to.

On the other hand, as shown in Figures 4 and 5, in the case of the structure that can be rotated of the small projector 110, that is, the structure having a rotating detachable means 120, the mobile terminal 103 and the small projector 110 Rotating hinge (not shown) or the like is further coupled to the detachable means 120 for integral or dualization, and after the two components are coupled, the mobile terminal 103 or the small projector (not shown) by the rotating hinge (not shown) or the like. In this case, as shown in FIG. 4, the image signal output terminal 108 and the image signal input terminal 113 are attached / removed means 120, and one of them is rotated. Rotating hinge (not shown) is further coupled to the terminal portion to form a structure in which the small projector 110 can rotate, or as shown in FIG. 5, the image signal output terminal 108 provided in the mobile terminal 103. Or provided in the small projector (110) An image signal input terminal 113 may be a structure which is connected to the connecting means 130 having a tip of the type coupled to the respective terminals (108, 113) thereof.

Next, a projection implementation through a mobile terminal having a detachable small projector having a connection structure as described above will be described.

6 is a block diagram of a projector driving of the mobile terminal according to the first embodiment of the present invention.

First, referring to a driving block diagram inside a mobile terminal, a desired image is processed through a series of operations such as amplifying a weak signal while minimizing noise after receiving a transmission signal including image information received from an antenna from a high frequency transmission and reception apparatus. Restore the information signal.

Next, through the high frequency transmission and reception device, the image information signal is converted into a calculation process or a specific standard form through a mobile station modem (MSM), which is the core processor of the mobile terminal, and then connected to the image display device. Projected through the liquid crystal panel to display image information.

In this case, the mobile station modem (MSM) is largely divided into a modem and a processing unit, and the mobile station modem (MSM) is simply represented by two components on a block diagram, but a printed circuit board (not shown). The circuit includes a circuit including a plurality of drive elements (not shown) and the like.

In addition, the mobile station modem (MSM) including the circuit may be connected to an input means such as a keypad, a speaker, and a storage device, in addition to an image display device, to process and process information input through the input means such as the keypad. Work such as displaying images or transmitting information signals to the outside through high frequency transmission and reception devices is also in progress.

In this case, the image information processed through the mobile station modem (MSM) is implemented by the image display device configured in the mobile terminal or may be stored in the storage device, but in the present invention, input to the image display device Or image information stored in the storage device is transmitted to a small projector including an image signal input terminal connected to an image signal output terminal configured in the mobile terminal. At this time, the image information transmitted to the small projector is controlled by the mobile terminal by software (S / W).

Meanwhile, in the small projector connected to the mobile terminal, the image information input through the image signal input terminal connected to the image signal output terminal of the mobile terminal is input to a liquid crystal panel including a red, green, and blue color filter layer to display an image. In this case, the liquid crystal panel emits light through a light source system composed of a plurality of white LEDs and passes through an optical system composed of a plurality of lenses and filters, thereby projecting onto a screen or a flat surface.

The small projector detachable to the hair terminal according to the present invention is preferably formed to have a size that is about the size of the mobile terminal for ease of portability, and in order to implement such a small size, a relatively internal component It is advantageous to make it small.

Therefore, it is characterized by having the simplest structure for projection in order to reduce its volume.

As shown, the small projector constituting the first embodiment of the present invention is largely a light source system, characterized in that the power supply and the light emitted from the battery to emit light, and the light generated from the light source system It is composed of an optical system for converting the light into a form suitable for projection and the light passing through the optical system is irradiated, and a liquid crystal panel for displaying the image signal received from the mobile terminal as an image.

At this time, since it is preferable to configure a small projector whose size is as small as possible due to the characteristics of the present invention, the light emitting body constituting the light source has a size of about 0.5 mm 2 to 5 mm 2, wherein the luminous efficiency has a value of at least 70 lm / W. It is preferable that a high output white chip LED 251 be used.

FIG. 7 is a view schematically illustrating a positional relationship between a light source system, an optical system, and a liquid crystal display panel in a small projector of a mobile terminal having a detachable small projector according to a first embodiment of the present invention.

As shown, in the mobile terminal having a detachable small projector according to the first embodiment of the present invention, in the case of the small projector 210, the light source system 250 using a plurality of high-output white chip LEDs 251 ) Is provided, and the light emitted from the light source system 250 focuses the light emitted from the plurality of lenses 253a, 253b, and 253c, for example, the light source system so that a stronger light is irradiated to the liquid crystal panel 260. An optical system 255 composed of a condenser lens having a characteristic of being described above or of a parallel light lens for allowing light from the light source system to be a parallel light source is configured.

In addition, the liquid crystal panel 260 corresponding to the optical system 255 has a structure that transmits light passing through the optical system 255 and includes a color filter layer (not shown) of red, green, and blue and has a high opening ratio structure. A rear side of the liquid crystal panel 260 is provided with a projection lens 215 to allow the light transmitted through the liquid crystal panel 260 to be projected onto a screen or a flat surface with an appropriate size.

In this case, the projection lens 215 is larger than the size of the display device (usually 2 inches to 6 inches) provided in the mobile terminal, for example, image information having an image implementation size of about 10 inches to 20 inches. In order to see the bar, it is not necessary to have a long focal point characteristic to have a large image size of more than 30 inches, instead it is characterized by having a short focal point characteristics and diffusion characteristics.

That is, in view of the characteristics of the present invention, it is preferable that the image size projected to be implemented on the screen or flat surface is 20 inches or less, so that the distance from the projection lens 215 to the screen on which the image is implemented is determined at 1 m or less. It is preferable to configure the lens having the focal length to be the projection lens 215.

Therefore, in the first embodiment having the above-described configuration, the same image signal input to the image display device (not shown) configured in the mobile terminal is applied to one liquid crystal panel 260 provided in the small projection 210. The light emitted from the light source system 250 and the optical system 255 disposed on the same line is incident on the liquid crystal panel 260 and then is projected onto the screen through the projection lens 215. It has a characteristic that can implement projection.

Next, a liquid crystal panel that forms an image display device in a mobile terminal, which is one component of the present invention, and is provided in a small projector, will be briefly described with reference to FIG. 8, which is an exploded perspective view thereof.

As shown in FIG. 8, the liquid crystal panel includes first and second substrates 320 and 340 bonded to each other with the liquid crystal layer 330 interposed therebetween.

First, the first substrate 320 is commonly referred to as a lower substrate or an array substrate, and includes a plurality of gate wirings 324 and data on one surface thereof in contact with the first transparent substrate 322 made of a material such as glass and the liquid crystal layer 330. The wirings 326 intersect in a matrix to form a rectangular pixel P. A thin film transistor T is provided as a switching element at each intersection of the gate wirings 324 and the data wirings 326 so that each pixel ( It is connected one-to-one with the transparent pixel electrode 328 mounted at P).

In addition, the second substrate 340 facing the second substrate 340 is generally called an upper substrate or a color filter substrate, and the second transparent substrate 342, such as glass, and one surface thereof, which is in contact with the liquid crystal layer 330, of the first substrate 320. A black matrix having a lattice-shaped opening that is repeated laterally and laterally to expose only the pixel electrode 328 while covering portions not directly related to the liquid crystal drive, such as the gate and data lines 324 and 326 and the thin film transistor T. 345 and the color filter layer 346 filled in each of the openings, as shown by way of example, the first to third color filter patterns 346a, 346b, and 346c having red, green, and blue colors, and transparent common electrodes covering them. 348 is provided.

Although not clearly shown in the drawings, first and second polarizers (not shown) for determining the polarization direction of light are attached to the outer surfaces of the first and second substrates 320 and 340, and the liquid crystal layer 330 An inner surface of the first and second substrates 320 and 340 in contact with each other is provided with an alignment layer (not shown) for determining the alignment direction of the liquid crystal molecules.

At this time, the above-described liquid crystal panel 317 does not have a self-luminous element, so a backlight or a light source system is provided on the back thereof to supply light, and therebetween due to a potential difference between the pixel electrode 328 and the common electrode 348. The arrangement direction of the interposed liquid crystal molecules is changed to indicate a difference in transmittance, and a first light having transmittance and red, green, and blue for each pixel while light emitted from the backlight or the light source passes through the liquid crystal panel 317. Various images are displayed through the color combination of the first to third color filter patterns 346a, 346b, and 346c.

On the other hand, in the first embodiment of the present invention, the liquid crystal panel having the above-described configuration is characterized in that only its size is modified to be configured inside the small projector.

Next, FIG. 9 is a block diagram of a projector driving a mobile terminal according to a second embodiment of the present invention, and FIG. 10 is a light source system in a small projector of a mobile terminal having a removable small projector according to a second embodiment of the present invention. And the positional relationship between the optical system and the liquid crystal panel. At this time, since the block diagram of the mobile terminal is the same as the first embodiment described above, a description thereof will be omitted.

First, the biggest feature of the second embodiment of the present invention is the internal configuration of the small projector detachable from the mobile terminal, and compared to the image information transmitted through the mobile terminal compared to the first embodiment is applied to the pixels of each color Further comprising a data splitter that separates data for each data, and further includes a first color filter layer having one of red, green, and blue colors instead of the liquid crystal panel having red, green, and blue color filter layers. And 2 and 3 liquid crystal panels, and further include two beam splitters and a dichroic prism.

Referring to the block diagram of FIG. 9, the image information transmitted from the mobile terminal is separated for each data to be applied to the pixels of each color through the data splitter and applied to the first to third liquid crystal panels, respectively, to implement an image. After the light from the light source system powered by the battery passes through the optical system, the light passes through the first, second and third liquid crystal panels, and then passes through the projection lens while the light passing through each liquid crystal panel is combined into one. It can be seen that the projection is made.

The internal structure of the small projector and the process of implementing the projection will be described in more detail with reference to FIG. 10. The light source system 450 may include a plurality of high-output white LEDs 451 each having a luminous efficiency of 70lm / W or more. The irradiated light having a first traveling direction is split while passing through a first beam splitter 471a located at a predetermined angle on a plane where light is incident with respect to the first traveling direction of the light. It proceeds as it is and a part is bent as if reflected as perpendicular to the first travel direction and irradiated in the second travel direction.

At this time, the light passing through the first beam splitter 471a is reflected by the first mirror 475a positioned at a predetermined angle with respect to the first travel direction, and then travels in parallel with the second travel direction. And irradiated, and then through the first side of the dichroic prism 480 having a rectangular parallelepiped through the first liquid crystal panel 461a having a red color filter layer positioned on the line in the third traveling direction. Some light incident to the inside and whose irradiation direction is changed by the first beam splitter 471a is split again by a second beam splitter 471b positioned on the second traveling direction line, and a part of the light Through the two beam splitter 471b, it is irradiated with the second traveling direction as it is, and partly irradiated in the fourth traveling direction parallel to the first traveling direction.

At this time, the light irradiated in the fourth advancing direction passes through the second liquid crystal panel 461b having the green color filter layer and is incident therein through the second side surface of the dichroic prism 480. The light passing through the two-beam splitter 471b is reflected by the second mirror 475b located on the second travel direction line and irradiated with a fifth travel direction parallel to the first travel direction. A third liquid crystal having a sixth traveling direction which is reflected by a third mirror 475c located on the fifth traveling direction line and has a sixth traveling direction which is the opposite of the third traveling direction and has a blue color filter layer located on the sixth traveling direction line It penetrates through the panel 461c and is incident therein through the third side of the dichroic prism 480.

In this case, 1/3 of the light incident to the first beam splitter 471a first passes through the first beam splitter 471a in the first traveling direction, and 2/3 of the first beam splitter 471a passes through the first beam splitter 471a. Preferably, the second beam splitter 471b has a characteristic that the amount of light irradiated in the fifth advancing direction and the second advancing direction has the same size as each other. The amount of light incident on the first, second and third liquid crystal panels 461a, 461b and 461c by the first and second beam splitters 471a and 471b having such characteristics is substantially the same.

On the other hand, the light incident through the first, second and third sides of the dichroic prism 480 is added to the light inside the dichroic prism 480, and then the fourth process through the fourth side. The projection is realized by passing through the projection lens 415 irradiated in the direction and positioned on the fourth travel direction line. At this time, the projection lens has the same characteristics as in the above-described first embodiment, and description thereof will be omitted.

Next, FIG. 11 is a block diagram of a projector driving a mobile terminal according to a third embodiment of the present invention, and FIG. 12 is a light source system in a small projector of a mobile terminal having a detachable small projector according to a third embodiment of the present invention. And the positional relationship between the optical system and the liquid crystal panel. At this time, since the block diagram of the mobile terminal is the same as the first embodiment described above, a description thereof will be omitted.

The biggest feature of the small projector of the mobile terminal with the detachable small projector according to the third embodiment of the present invention is that the red, green and blue high outputs are characterized by emitting a data splitter and red, green and blue, respectively. The first, second, and third light source systems configured as chip LEDs, the first, second and third optical systems, and the first and second liquid crystal panels formed without the first and second mirrors, the dichroic prism, and the color filter layer as components. .

First, referring to the block diagram of FIG. 11, image information transmitted from a mobile terminal and applied to a small projector through an image signal input terminal is separated for each data to be applied to pixels of each color through a data splitter and formed without a color filter layer. It is applied to the first to the third liquid crystal panel characterized in that the image is implemented, in this case, the light emission from the first, second and third light source respectively emitting red, green and blue power is applied through the battery The first light connected to each of the first, second and third optical systems after passing the light through the optical system of one of the first, second and third optical systems respectively connected to the first, second and third light sources of each of these colors. It can be seen that the projection is achieved by passing through the projection lens while the light passing through the 2, 3 and 3 liquid crystal panels and the light transmitted through each liquid crystal panel is combined by the dichroic prism. .

The internal configuration of the small projector constituting the third embodiment of the present invention, as shown in Figure 12, the first, second and third to emit light of red, green and blue, respectively, located on the same line with a predetermined interval Each of the red, green, and blue light emitted from the light source systems 550a, 550b, and 550c has first, second, and third travel directions parallel to each other, and is positioned on the first, second, and third light source systems respectively. Irradiated through 555a, 555b 555c.

Meanwhile, the green light having the second traveling direction and passing through the second light source system 555b passes through the second liquid crystal panel 560b positioned on the second traveling direction line, and then is located on the same line. It enters through the second side of the rectangular parallelepiped dichroic prism 580.

Further, the red and blue light emitted in the first and third travel directions and passing through the first and third optical systems 555a and 555c, respectively, are respectively located on the first and third travel direction lines. Reflected by the mirrors 575a and 575b, respectively, located on a straight line with each other, only the traveling directions thereof are opposite to each other, and are irradiated toward the dichroic prism 580, and the fourth and fifth traveling directions are opposite to each other. And inside the dichroic prism 580 through the first and third side surfaces of the dichroic prism 580 through the first and third liquid crystal panels 561a and 561c respectively positioned on the line 5 in the direction of travel. Incident.

Subsequently, red, green, and blue light transmitted through the first, second, and third liquid crystal panels 561a, 561b, and 561b incident into the dichroic prism 580 are internal to the dichroic prism 580. In this case, the projection is performed by passing through the projection lens 515 through the fourth side and having the second advancing direction. Since the projection lens 515 has the same characteristics as those described in the first embodiment, description thereof will be omitted.

According to the present invention described above is provided with a detachable small projector that can project the display image of the mobile terminal possessed by the outside to the outside, improve the utilization of the mobile terminal and solve various disadvantages due to its narrow screen It can be effective.

Specifically, when watching a movie or the like, it is possible to watch the projected screen enlarged larger, which can satisfy the user sufficiently and at the same time has the effect of satisfying the light and small size of the size that is most required in the mobile terminal.

Claims (16)

A terminal comprising a display unit having a display device, an input unit for manipulation, and a main body unit having an image signal output terminal on one side thereof; And an image information input terminal connected to the image information output terminal and receiving image information, the projector being coupled or separated by the terminal and detachment means. Mobile terminal with a removable projector comprising a. The method of claim 1, And the image signal output terminal and the image signal input terminal are formed in the form of recesses and convex portions so that the image signal output terminal and the image signal input terminal are directly attached to and connected to the two terminals, thereby providing the detachable means. The method of claim 1, And the detachable means is rotated so that the terminal and the projector are combined and then rotated. The method of claim 3, wherein And the image signal output terminal and the image signal input terminal are connected via a connecting means. The method of claim 1, The projection lens is a short focal lens and a mobile terminal having a detachable projector, characterized in that to display an image of 20 inches or less on a flat surface on a flat surface at a projection distance of 1m or less. The method of claim 1, The projector,  To improve the parallel characteristics of the liquid crystal panel which receives the image information inputted to the image information input terminal unit and displays an image, a power supply unit, a light source system that emits power by receiving power from the power supply unit, and light emitted from the light source system; And a detachable projector including an optical system, and a projection lens to which light passing through the optical system and the liquid crystal panel is incident. The method of claim 6, The liquid crystal panel is a mobile terminal having a detachable projector including a red, green, blue color filter layer. The method of claim 1, The projector, An image signal input terminal connected to the image signal output terminal to receive image information, a data splitter for classifying image information input to the image information input terminal unit into image data of first to third groups, and the first First to third liquid crystal panels for inputting the third to third group data, respectively, to display red, green, and blue images, a power supply unit, a light source system that emits light by receiving power from the power supply unit, and the light source system. An optical system for improving parallelism of light, first and second beam splitters for splitting light passing through the optical system into first, second, and third light beams, and the second incident light in different directions. Desorption including a dichroic prism for summing the first, second and third light beams and passing in one direction, and a projection lens to which light emitted through the dichroic prism is incident Mobile terminal with projector available. The method of claim 8, And the projector further comprises first and second mirrors for injecting the first, second and third light beams divided by the first and second beam splitters into different side portions of the dichroic prism. Mobile terminal with detachable projector. The method of claim 8, The first to the third liquid crystal panel is a mobile terminal having a detachable projector, characterized in that each of the color filter layer of any one of the red, green and blue color filter layer is formed. The method of claim 6 or 8, The light source system is a mobile terminal having a detachable projector consisting of a plurality of white chip LED. The method of claim 11, The white chip LED is a mobile terminal having a removable projector, characterized in that each luminous efficiency is at least 70lm / W or more. The method of claim 1, The projector, An image signal input terminal connected to the image signal output terminal to receive image information, a data splitter for classifying image information input to the image information input terminal unit into image data of first to third groups, and the first First to third liquid crystal panels for inputting the third to third group data to display an image, and a first to third light sources for emitting red, green, and blue light, respectively, by receiving power from the power supply unit and the power supply unit, respectively. And the first to third optical systems, and the first and second optical systems incident from different directions, to improve parallelism between the system, the first, second, and third light beams from the first to third light sources. And a dichroic prism for summing the third light beams and passing in one direction, and a projection lens including a projection lens to which light emitted through the dichroic prism is incident. Compared to mobile terminals. The method of claim 13, And the projector further includes first and second mirrors to allow the first, second and third light beams passing through the first to third optical systems to enter different side portions of the dichroic prism. Mobile terminal with projector available. The method of claim 13, And the first to third liquid crystal panels are all formed without a color filter layer. The method of claim 13, The first to the third light source system is a mobile terminal having a removable projector, characterized in that each formed of a plurality of chip LED emitting red, green, blue.

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