KR101023719B1 - Detachable Liquid Crystal Display Device - Google Patents

Abstract

It is to provide a removable liquid crystal display device having high portability and reducing power consumption by using an LED light emitting lamp, and the removable liquid crystal display device of the present invention for achieving the above object includes upper and lower substrates and a space therebetween. A liquid crystal module comprising a liquid crystal panel having a liquid crystal layer filled in the liquid crystal layer and light transmitting means provided on a rear surface of the liquid crystal panel; And a structure including a fastening groove capable of fastening the liquid crystal module and a plurality of point light sources formed inside the fastening groove and irradiating light to one side of the light transmitting means, and a pedestal for supporting the liquid crystal module. It includes a cradle (cradle), the liquid crystal module is detachable from the fastening groove of the cradle, the size of the liquid crystal module is selectable from the same size or smaller than the size of the pedestal, the size of the liquid crystal module is the pedestal And a plurality of point light sources are partially lit according to the fastening area of the liquid crystal module and the cradle.

Point light source, LED, Removable, Transparent board, Yellow light emitting phosphor

Description

Detachable Liquid Crystal Display Device

1 is a perspective view illustrating a liquid crystal display device having a conventional backlight unit;

2 is a conceptual diagram of an edge type removable liquid crystal display device according to the present invention;

3 is a conceptual diagram of a direct type detachable liquid crystal display for applying to the present invention;

4A and 4B are front and side perspective views of a removable liquid crystal display device according to a first embodiment of the present invention.

5A and 5B are a plan view and a front view of the light emitting lamp unit in FIG. 4;

6A and 6B are exemplary views in which liquid crystal panels of different sizes are fastened in the removable liquid crystal display according to the first embodiment of the present invention.

7 is a perspective view of a removable liquid crystal display device according to a second embodiment of the present invention.

8 is a perspective view illustrating the light emitting lamp unit of FIG. 7;

9 is an exemplary view in which liquid crystal panels of different sizes are fastened in a removable liquid crystal display according to a second exemplary embodiment of the present invention.

10 is a side structure diagram of a liquid crystal display according to a third embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

400, 500: liquid crystal module 410, 510: liquid crystal panel

411, 511: fastening groove 420: light transmission means

430, 530: Battery 431, 531: PCB

432, 532: first connector 440, 540: point light source

441 and 541: body part 442 and 542: light emitting part

450, 550: cradle 451, 551: main structure

452, 552: pedestal 453, 553: second connector

520: transparent substrate 521: yellow light emitting phosphor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a removable liquid crystal display device having a LED light emitting lamp, which enables partial lighting.

CRT (Cathode Ray Tube), one of the commonly used display devices, is mainly used for monitors such as TVs, measuring devices, and information terminal devices.However, due to the weight and size of the CRT itself, Could not respond actively to demands.

Therefore, in the trend of miniaturization and weight reduction of various electronic products, CRT has a certain limit in weight and size, and is expected to replace the liquid crystal display device (LCD) using the electro-optic effect, and gas discharge. There are plasma display panels (PDPs) and electroluminescent displays (ELDs) using electroluminescent effects, among which researches on liquid crystal displays (LCDs) are being actively conducted.

In order to replace the CRT, liquid crystal display devices having advantages such as small size, light weight, and low power consumption have been actively developed. In recent years, an ultra-thin flat display display having a thickness of only a few centimeters (Cm) is used. Developed enough to fulfill its role as a device, it is used in spacecraft, aircraft, laptop computers, laptop computer monitors, desktop computer monitors, and large information display devices. The demand for liquid crystal display devices continues to increase. to be.

Since most of the liquid crystal display devices are light-receiving devices that display images by controlling the amount of light coming from the outside, a separate light source, that is, a backlight unit, for irradiating light to the LCD panel is necessary.

In general, a backlight unit used as a light source of a liquid crystal display device is a method of arranging a cylindrical light emitting lamp, and is divided into a direct backlight type unit and an edge type backlight unit.

Among these, the direct type backlight unit is mainly developed as the size of the liquid crystal display device is increased to 20 inches or more. A plurality of lamps are arranged in a row on the lower surface of the diffuser plate to direct light to the front of the liquid crystal panel. Direct dimming.

Such a direct backlight unit is mainly used for a large screen liquid crystal display device requiring high brightness because of high light utilization efficiency.

On the other hand, the edge-type backlight unit is a lamp unit is installed on the side of the light guide plate for guiding light, the lamp unit is a lamp that emits light, the lamp holder is inserted into both ends of the lamp to protect the lamp and the outer peripheral surface of the lamp It is provided with a lamp reflector to surround the light guide plate and one side is fitted to the side of the light guide plate to reflect the light emitted from the lamp toward the light guide plate.

As such, the edge type backlight unit, in which the lamp unit is installed on the side of the light guide plate, is mainly applied to a relatively small liquid crystal display device such as a laptop computer and a desktop computer monitor. This is long and advantageous for thinning the liquid crystal display device.

In the backlight unit, research on an edge type backlight unit has been actively conducted in accordance with a demand for thinner and lighter display unit.

In addition, since the edge method provides flat lighting, it is used as a flat panel display in various fields as well as notebook PCs and liquid crystal TVs, and its range is gradually spreading.

Hereinafter, a liquid crystal display device having a backlight unit manufactured according to the prior art will be described with reference to the accompanying drawings.

1 is a perspective view of a liquid crystal display device having a backlight unit manufactured according to the prior art.

A conventional LCD having a backlight unit includes an LCD panel unit 14 and a backlight unit. As shown in FIG. 1, a lamp 10 serving as a light source for emitting light and a lamp 10 may be used. A light guide plate 11 for guiding the emitted light and reflecting the light to the LCD panel 14, a diffusion sheet 12 for diffusing the light exiting the light guide plate 11 at a predetermined angle, and the diffused sheet 12. A prism sheet 13 that condenses and transmits the light to the LCD panel unit 14, an LCD panel unit 14 formed at an upper end of the prism sheet 13, and a fixing mechanism formed at a lower end of the light guide plate 11 ( Not shown) and a lower reflector 16 which reflects the light transmitted to the fixture to the LCD panel 14 to minimize the loss of light.

In addition to the above configuration, the lamp reflector 18 surrounding the outside of the lamp 10 excluding the light incident surface of the light guide plate 11 to reduce the loss of the outgoing light of the lamp 10 emitted to the light incident surface of the light guide plate 11 and In addition, a lamp holder 17 formed at both ends of the lamp 10 is further provided to fix the lamp 10 to a predetermined position and prevent excessive entry of the light guide plate 11 into the lamp 10 area.

In the above, a plurality of diffusion sheets 12 may be formed as necessary.

In the above, the backlight unit is manufactured according to an edge method, and is used for a monitor in which lamps are disposed at both sides of the light guide plate. The backlight unit may be applied to a notebook PC in addition to the monitor, in which a lamp is disposed only on one side of the light guide plate.

In the conventional liquid crystal display device configured as described above, the backlight unit and the LCD panel unit are integrally coupled, and in particular, the backlight unit provided below the LCD panel unit is integrally coupled with the reflector plate, the light guide plate, the diffusion sheet, the prism sheet, and the lamp. Since the light guide plate must be included in order to output the line light source to the surface light source, there is a problem in that the weight is heavy. In addition, there is a disadvantage that the portability is poor because it is so heavy.

The present invention has been made to solve the above problems, an object of the present invention is to provide a removable liquid crystal display device that is highly portable and can reduce power consumption by using an LED light emitting lamp.

Removable liquid crystal display device of the present invention for achieving the above object is a liquid crystal module comprising an upper and lower substrate and a liquid crystal layer filled therebetween, and a light transmitting means provided on the back of the liquid crystal panel and; It includes a fastening part for fastening the liquid crystal module, characterized in that it comprises a cradle (cradle) mounted with a plurality of point light sources for irradiating light to the light transmission means.

The point light source is characterized in that the LED is composed of a body portion and a light emitting portion.

The cradle is characterized by consisting of the main structure to which the liquid crystal module is fastened, and a support to support the liquid crystal module.

The point light source is characterized in that arranged in one direction in one side of the main structure of the cradle in an edge manner.

The point light source is characterized in that arranged in a matrix shape on one surface of the pedestal of the cradle in a direct manner.

When the point light source is arranged in an edge manner, the light transmitting means is composed of a light guide plate, a diffusion plate, a diffusion sheet, and a prism sheet.

When the point light source is arranged in a direct manner, the light transmitting means is characterized by consisting of a diffusion sheet and a prism sheet.

According to another embodiment of the present invention, a removable liquid crystal display device includes a liquid crystal panel having an upper and a lower substrate and a liquid crystal layer filled therebetween, a transparent substrate formed on a rear surface of the liquid crystal panel, and one side of the transparent substrate. A liquid crystal module composed of a yellow light emitting phosphor coated on; A fastening groove for fastening the liquid crystal module is provided, and includes a cradle in which a plurality of point light sources are mounted to irradiate light on the transparent substrate.

The point light source is a blue LED composed of a body portion and a light emitting portion, characterized in that arranged in one direction in one side of the main structure of the cradle in an edge manner.

The yellow light emitting phosphor is applied to one side of the transparent substrate adjacent to the liquid crystal panel or both sides of the transparent substrate.

Before explaining the present invention by embodiments, the concept of the removable liquid crystal display of the present invention will be described.

2 is a conceptual view of an edge type removable liquid crystal display device for applying to the present invention, and FIG. 3 is a conceptual view of a direct type removable liquid crystal display device for applying to the present invention.

As shown in FIG. 2, the removable liquid crystal display includes a liquid crystal module 100 and a cradle 200.

The liquid crystal module 100 includes a liquid crystal panel 110, a functional optical film 120, a light guide plate 130, a reflective plate 140, and a housing 150 surrounding them.                     

The cradle 200 in which the liquid crystal module 100 is mounted includes a lamp 210 that provides light to the light guide plate 130, an inverter 220 that provides AC power to the lamp 210, and various image information. Is provided with a connector 230 for receiving.

The video receiving connector 230 may include DVI (Digital Viedo Interactive), Svideo, Component, Composite, USB, for example, DVI is TV and video, Svideo is TV, Component is TV, Composite is Digital The camera and USB are for receiving various image information such as a computer.

While the lamp 210 of FIG. 2 is arranged in an edge manner, FIG. 3 conceptually illustrates a removable liquid crystal display in which the lamp is arranged in a direct manner.

The direct type detachable liquid crystal display device also has a liquid crystal module 100 and a cradle 200 as shown in FIG. 3.

The liquid crystal module 100 includes a liquid crystal panel 110, a functional optical film 120, and a housing 150 surrounding the liquid crystal panel 110. In this case, the light guide plate may be omitted.

The cradle 200 on which the liquid crystal module 100 is mounted includes the main structure 201 and the pedestal 202, and the liquid crystal module 100 is mounted on the main structure 201 and outputs AC power to the backlight unit. Inverter 220 and a connector 230 for receiving a variety of image information is provided, the pedestal 202 is provided with a direct-back type backlight unit to irradiate the back of the liquid crystal panel 110.

In the case of the direct type, the lamps 215 are arranged in parallel on the rear surface of the liquid crystal panel so as to be suitable for large size, such as a desktop monitor or a TV.                     

Hereinafter, although not shown in the drawings when explaining the structure when mounting the liquid crystal module to the cradle, there is a first connector on the back of the liquid crystal panel, the slide groove (groove) to be mounted on the cradle in a sliding manner on both sides ) Is formed. The cradle is formed with a slide protrusion corresponding to the slide groove of the liquid crystal module, that is, downward from the top thereof. When the liquid crystal module is mounted by sliding, a third connector is provided at a position corresponding to the position of the first connector. Position so that the first and third connectors are connected when mounted.

Here, the first and third connectors adopt a low voltage differential signaling (LVDS) transmission method. In addition, separate power supply may be made through the second and fourth connectors, which are not shown, and the connector may be included in or separately from the first and third connectors. The cradle is equipped with a lamp.

Removable liquid crystal display device to be applied to the present invention described above may be a variety of methods of mounting may be taken into consideration when considering mechanically.

As described above, the concept of the removable liquid crystal display device for applying to the present invention has been described. Hereinafter, the removable liquid crystal display device according to the present invention will be described with reference to the accompanying drawings.

Removable liquid crystal display device of the present invention is characterized in that the component of the backlight unit for transmitting light to the liquid crystal panel is provided with a lamp in the cradle, and the liquid crystal panel and the light transmitting means is configured to be removable in the cradle equipped with the lamp. .

First embodiment

4A and 4B are front and side perspective views of a removable liquid crystal display according to a first embodiment of the present invention.

5A and 5B are a plan view and a front view of a light emitting lamp unit in FIG. 4, and FIGS. 6A and 6B are views in which liquid crystal panels of different sizes are fastened in a removable liquid crystal display according to a first exemplary embodiment of the present invention. It is also.

In the detachable liquid crystal display according to the first embodiment of the present invention, only the lamp of the components of the backlight unit is separated into the cradle by the edge method, and the lamp is configured as a point light source of the LED to size the liquid crystal panel fastened to the cradle. Therefore, there is a feature in that only the necessary part can be turned on and used.

More specifically, as shown in Figures 4a and 4b, it is composed of a liquid crystal module 400 and a cradle 450, wherein the liquid crystal module 400 is the upper and lower substrates and the liquid crystal layer filled therebetween. A fastening groove for fastening the liquid crystal module 400 to the liquid crystal panel 410, the light transmitting means 420 provided on the rear surface of the liquid crystal panel 410, and the cradle 450. 411 is provided and a plurality of point light sources 440 for irradiating light to the light transmitting means 420 is mounted.

On the back of the light transmitting means 420 is a printed printed circuit board (PCB) 431 equipped with a battery 430 capable of driving a liquid crystal display and a first connector 432 for coupling with a cradle 450. It is further provided.

In addition, a power line (not shown) for driving the point light sources 440 protrudes from one side of the cradle 450.                     

The cradle 450 includes a main structure 451 on which point light sources 440 are mounted, a pedestal for supporting the liquid crystal panel 410, the light transmitting means 420, the battery 430, and the PCB 431 from behind. 452 and a second connector 453 formed on one side of the pedestal 452 corresponding to the position of the first connector in order to couple the liquid crystal module 400 and the cradle 450.

The light transmitting means 420 may include a light guide plate for guiding the light generated from the point light source 440 and delivering the light to the liquid crystal panel 410, and a diffusion plate for diffusing the light emitted from the upper portion of the light guide plate at a predetermined angle. It consists of a diffusion sheet and a prism sheet that collects the diffused light and transmits it to the liquid crystal panel 410.

As illustrated in FIGS. 5A and 5B, the point light sources 440 are composed of LEDs including a body part 441 and a light emitting part 442, and the main structure 451 of the cradle 450 is edged. It is arranged in one direction inside.

In the detachable liquid crystal display according to the first exemplary embodiment of the present invention having the above configuration, the liquid crystal panel 410 is detachable from the cradle 450 provided with the point light source 440.

In addition, the plurality of point light sources 440 composed of LEDs may be partially lit to generate light only in the point light sources 440 required, and the light generated from the point light source 440 may be used to transmit the light transmitting means 420. It is transmitted to the liquid crystal panel 410 through.

As such, since the point light sources 440 provided in the cradle 450 may partially light up, only the point light sources 440 of the portion corresponding to the size of the liquid crystal panel 410 are changed when the size of the liquid crystal panel 410 is changed. It may be used by lighting it partially.                     

That is, as shown in FIG. 6A, when the size of the liquid crystal panel 410 fastened to the cradle 450 is shorter than the length of the cradle 450, the liquid crystal panel 410 is fastened to the cradle 450. When only the point light sources 440 corresponding to the portion where the liquid crystal panel 410 is fastened are turned on and driven, and as shown in FIG. 6B, the size of the liquid crystal panel 410 fastened to the cradle 450 is the same. In this case, all the point light sources 440 may be turned on and driven.

When the point light source 440 is configured as an LED as described above, only the point light source corresponding to the size of the liquid crystal panel needs to be turned on, thereby reducing power consumption.

Second embodiment

7 is a perspective view of a removable liquid crystal display device according to a second embodiment of the present invention.

8 is a perspective view illustrating the light emitting lamp unit of FIG. 7, and FIG. 9 is an exemplary view in which liquid crystal panels having different sizes are fastened in the removable liquid crystal display according to the second exemplary embodiment of the present invention.

The liquid crystal display device according to the second embodiment of the present invention is characterized by arranging lamps (i.e., point light sources) in a direct manner by separately configuring a lamp among the components of the backlight unit.

In more detail, as shown in FIGS. 7 and 8, a plurality of point light sources 440 are arranged in a matrix structure in the cradle 450 to drive in a direct manner, and the pedestal 452 is the size of the liquid crystal panel. The light guide plate is not provided to the light transmitting means 420, but only the diffusion plate, the diffusion sheet, and the prism sheet are provided. Except for the above components, it is the same as the structure of the removable liquid crystal display according to the first embodiment of the present invention.

In addition, the removable liquid crystal display according to the second embodiment of the present invention having the above configuration, as in the first embodiment of the present invention, the point light source 440 is composed of LED, it is possible to partially light.

As shown in FIG. 9, when the size of the liquid crystal panel 410 fastened to the cradle 450 is smaller than the overall size of the point light sources 440 formed on the cradle 450, the cradle 450 has a cradle 450. After the liquid crystal panel 410 is fastened to each other, only the point light sources 440 corresponding to the portion where the liquid crystal panel 410 is fastened may be turned on and driven.

Although not shown in the drawing, when the total size of the liquid crystal panel 410 and the point light sources 440 fastened to the cradle 450 is the same, all the point light sources 440 may be turned on and driven.

When the point light source 440 is configured as an LED as described above, only the point light source corresponding to the size of the liquid crystal panel 410 needs to be turned on, thereby reducing power consumption.

Third Embodiment

10 is a side structure diagram of a liquid crystal display according to a third embodiment of the present invention.

In the removable liquid crystal display according to the third embodiment of the present invention, only the lamp is separated from the components of the backlight unit, and the lamp is composed of blue LEDs, is arranged in an edge manner, and a yellow light emitting phosphor is applied behind the liquid crystal panel. The characteristic is that the transparent substrate is configured.

In more detail, as shown in FIG. 10, the liquid crystal module 500 and the cradle 550 are configured, wherein the liquid crystal module 500 includes upper and lower substrates and a liquid crystal layer filled therebetween. A panel 510, a transparent substrate 520 formed in a rectangular plate shape on the rear surface of the liquid crystal panel 510, and a yellow light emitting phosphor 521 coated on one side of the transparent substrate 520 are provided. The cradle 550 includes a fastening groove 511 for fastening the liquid crystal module 500 and a plurality of point light sources 540 for irradiating light to the transparent substrate 520. It is.

On the back of the transparent substrate 520, a printed printed circuit board (PCB) 531 mounted with a battery 530 capable of driving a liquid crystal display and a first connector 532 for coupling with a cradle 550 are further included. It is provided.

A power line (not shown) for driving the point light sources 540 protrudes from one side of the cradle 550.

The cradle 550 supports the main structure 551 on which the point light sources 540 are mounted, and a pedestal 552 supporting the liquid crystal panel 510, the transparent substrate 520, the battery 530, and the PCB 531 from behind. ) And a second connector 553 formed on one side of the pedestal 552 corresponding to the position of the first connector 532 in order to couple the liquid crystal module 500 and the cradle 550. .

As illustrated in FIG. 10, the point light sources 540 are composed of a blue LED including a body 541 and a light emitting part 542, and the main structure of the cradle 550 is driven in an edge manner. 551 is arranged in one direction.

In addition, the transparent substrate 520 and the yellow light-emitting phosphor 521 guide light emitted from the point light source 540 to transmit white light to the liquid crystal panel 510.

The yellow light emitting phosphor 521 is applied to one side of the transparent substrate 520 adjacent to the liquid crystal panel 510. In this case, the yellow light emitting phosphor 521 may be applied to both side surfaces of the transparent substrate 520.

If the point light source 540 is formed as a blue LED as described above, and the yellow light emitting phosphor 521 is coated on the transparent substrate 520, the blue light emitted from the point light source 540 is applied to the transparent substrate 520. The yellow light emitting phosphor 521 is excited, and blue and yellow are mixed to provide a white surface light source.

In the liquid crystal display according to the third exemplary embodiment of the present invention configured as described above, the surface light source may be realized without providing a separate diffusion plate or diffusion sheet between the transparent substrate 520 and the liquid crystal panel 510.

In the liquid crystal display according to the third embodiment of the present invention having the above configuration, the liquid crystal panel 510 is detachable from the cradle 550 provided with the point light source 540.

In addition, the plurality of point light sources 540 composed of blue LEDs may be partially lit to generate light only at a necessary portion, and the light generated from the point light sources 540 is transferred to the liquid crystal panel 510 through the transparent substrate 520. Is delivered).

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the above embodiments, but should be defined by the claims.

The removable liquid crystal display of the present invention as described above has the following effects.

First, since the liquid crystal panel can be attached to and detached from the cradle having the light emitting lamp, the portability is high, and it is easy to replace only the liquid crystal module provided with the liquid crystal panel separately from the system of the liquid crystal display.

Secondly, since the cradle is provided with a point light source composed of a plurality of LEDs of the edge method or the direct method, the point light source can be partially turned on according to the size of the liquid crystal panel. Accordingly, power consumption can be reduced.

Third, by providing a blue LED and a transparent substrate coated with a yellow light emitting phosphor on one side or both sides, a surface light source can be realized without providing a separate diffusion plate or diffusion sheet between the transparent substrate and the liquid crystal panel. The thickness of the display device can be reduced, thereby improving production competitiveness.

Claims (10)

A liquid crystal module including an upper and lower substrates and a liquid crystal panel having a liquid crystal layer filled therebetween, and light transmitting means provided on a rear surface of the liquid crystal panel; And Cradle consisting of a fastening groove for fastening the liquid crystal module and a main structure formed inside the fastening groove and provided with a plurality of point light sources for irradiating light to one side of the light transmitting means, and a pedestal for supporting the liquid crystal module (cradle), The liquid crystal module is detachable from the fastening groove of the cradle, and the size of the liquid crystal module is selectable from a size equal to or smaller than the size of the pedestal, and when the size of the liquid crystal module is smaller than the size of the pedestal, And a point light source is partially lit according to the fastening area of the liquid crystal module and the cradle. The method of claim 1, The point light source is a removable liquid crystal display device, characterized in that the LED consisting of a body portion and the light emitting portion. delete The method of claim 1, And the point light source is arranged in one direction in one side of the main structure of the cradle in an edge manner. delete The method of claim 4, wherein And the light transmitting means includes a light guide plate, a diffusion sheet, and a prism sheet when the point light sources are arranged in an edge manner. delete delete delete delete

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