KR100775970B1 - A display device of mobile terminal and an illumination method using the same - Google Patents

Abstract

A display device of a mobile terminal and an illumination method using the display device are provided to drive the display device mounted on the terminal as an illumination device according to a lot of illumination pattern information, thus there is no need to equip a separate illumination device. A display panel(110) consists of plural pixels. A backlight(161) applies light to each pixel. A backlight driver(160) controls output illumination of the backlight(161). An illumination pattern storage(190) stores a lot of illumination pattern information having each of image information and illumination information corresponding to the image information. An illumination mode controller(170) decides whether a display device of a mobile terminal operates in illumination mode or general display mode. If the display device operates in the illumination mode, the controller(170) drives the display panel(110) with image information included in illumination pattern information selected from the storage(190), and provides illumination information included in the selected illumination pattern information to the backlight driver(160).

Description

Display device of mobile terminal and lighting method using same {A DISPLAY DEVICE OF MOBILE TERMINAL AND AN ILLUMINATION METHOD USING THE SAME}

1 is a diagram showing a system configuration according to an embodiment of the present invention.

2 is a diagram illustrating a liquid crystal display device implemented in a mobile terminal according to an embodiment of the present invention.

FIG. 3 is a diagram illustrating pixels of the liquid crystal display shown in FIG. 2.

4 is a view showing an illumination method using a liquid crystal display device implemented in a mobile terminal according to an embodiment of the present invention.

The present invention relates to a display device of a mobile terminal and an illumination method using the same, and more particularly, to a display device of a mobile terminal capable of displaying various lighting patterns and an illumination method using the same.

As mobile communication develops, many users always carry a mobile terminal, and various functions are added to the mobile terminal to help a lot in real life.

As one of various functions, a lighting apparatus using a backlight (Back Light) embedded in a mobile terminal is proposed in Korean Patent Laid-Open Publication No. 10-2005-0020429.

According to the related art, a light emitting diode applied to a backlight of a liquid crystal display (LCD) of a mobile terminal is used as a high efficiency diode and a separate night light operation switch is added. In addition, the backlight of the mobile terminal is used as a lighting device by erasing all display contents of the LCD while operating the backlight to a rated threshold value only when used for night lighting.

However, the above-described conventional technology uses only a backlight built in a mobile terminal as a light device for illuminating a dark place, and does not provide various lighting patterns.

As various events increase as the income level increases, the lighting patterns used for these events are also diversified, which requires a separate lighting device to be carried. In addition, since it is not easy to change the lighting pattern used in the portable lighting device, only a predetermined pattern is used without changing the lighting pattern.

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the problems of the prior art, and to provide a display device of a mobile terminal providing various lighting patterns and an illumination method using the same.

A display device of a mobile terminal according to a feature of the present invention

A display panel including a plurality of pixels;

A backlight for applying light to each pixel;

A backlight driver which controls an output illuminance of the backlight;

 An illumination pattern storage unit for storing a plurality of illumination pattern information each having image information and illuminance information corresponding to the image information; And

It is determined whether the display device of the mobile terminal operates in the illumination mode or the normal display mode. When the display device of the mobile terminal operates in the illumination mode, image information included in the illumination pattern information selected from the illumination pattern storage unit is used. And an illumination mode controller configured to drive the display panel and provide illumination information included in the selected illumination pattern information to a backlight driver.

Herein, when the display device of the mobile terminal operates in the normal display mode, the illumination mode controller drives the display panel with image information received from the outside, and the backlight driver is backlighted with the illuminance set for the general display mode. To drive.

In addition, one or more of the plurality of lighting pattern information stored in the lighting pattern storage unit may be received from a web server providing the lighting pattern information.

On the other hand, the illumination method using the display device of the mobile terminal according to a feature of the present invention

An illumination method using a display device of a mobile terminal including a display panel, a backlight, and a backlight driver,

determining whether an operation mode of the display device of the mobile terminal is an illumination mode or a general display mode;

(b) a lighting pattern desired by a user from the plurality of lighting pattern information stored in the display device of the mobile terminal, wherein the lighting pattern information includes image information and illuminance information when the lighting mode is determined in the step (a); Selecting information;

(c) extracting image information and illuminance information from the selected illumination pattern information; And

(d) driving the display panel based on the gray scale data and the synchronization signal corresponding to the extracted image information, and driving the backlight with a first illuminance corresponding to the extracted illuminance information.

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. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. 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.

In addition, when a part is said to "include" a certain component, this means that it may further include other components, except to exclude other components unless otherwise stated.

In addition, the term "... unit" described herein refers to a unit for processing a specific function or operation, which may be implemented in hardware or software or a combination of hardware and software.

1 is a diagram showing a system configuration according to an embodiment of the present invention.

As shown in FIG. 1, a mobile terminal 100 capable of displaying various lighting patterns is connected to a mobile communication network 300. As shown in FIG. 1, the mobile communication network 300 includes a base station 310, a base station control device 320, a circuit switching device 330, a home location registration device 340, and a gateway 350. Since the device constituting the mobile communication network is an expert (hereinafter referred to as a person skilled in the art) belonging to the technical field of the present invention, a description thereof will be omitted.

In addition, a web server 500 providing various lighting pattern information is connected to the mobile communication network 300 through the Internet network 400. In this case, the illumination pattern information includes image information such as still images or moving images and illuminance information indicating brightness of a backlight.

The mobile terminal 100 receives and stores various lighting pattern information from the web server 500 through the mobile communication network 300 and the Internet network 400. In this case, the method for the mobile terminal 100 to receive the lighting pattern information from the web server 500 through the mobile communication network 300 and the Internet network 400 will be easily understood by those skilled in the art, so a description thereof will be omitted.

2 illustrates a liquid crystal display (LCD) implemented in a mobile terminal according to an embodiment of the present invention.

2, in the liquid crystal display device implemented in a mobile terminal according to an embodiment of the present invention, an LCD includes a panel 110, a scan driver 130, a data driver 120, a gray voltage generator 140, and a timing. The controller 150 includes a backlight 161, a backlight driver 160, an illumination mode controller 170, an illumination pattern selector 180, and an illumination pattern storage 190.

The panel 110 includes a plurality of pixels 111 disposed in a matrix at the intersection of the scan line S and the data line D. FIG.

The illumination pattern storage unit 190 stores various illumination pattern information, and each illumination pattern information includes image information such as still images or moving images and illuminance information indicating brightness of a backlight. At this time, each image information includes a gray scale data signal (R, G, B DATA), a horizontal synchronization signal (Hsync) and a vertical synchronization signal (Vsync). In addition, the illuminance included in each lighting pattern information is set differently according to the lighting pattern. For example, the illuminance used as the lighting device is set to the largest value, and in the case of the lighting pattern for the birthday event, the illuminance used for the lighting device. Is set to a lower value.

The lighting pattern selector 180 selects one of various lighting pattern information stored in the lighting pattern storage 190 in response to a user's selection.

The illumination mode controller 170 determines whether the liquid crystal display of the mobile terminal operates in a general display device (ie, display mode) or an illumination device (ie, illumination mode). The image information (ie, grayscale data signals R, G, and B data), the horizontal synchronization signal Hsync, and the vertical synchronization signal Vsync that have been received or prestored (not shown) in the terminal are provided to the timing controller.

In addition, when the liquid crystal display of the mobile terminal operates in the illumination mode according to the user's selection, the illumination mode controller 170 may include image information (ie, gradation data signal) of the illumination pattern information selected from the illumination pattern storage unit 190. (R, G, B DATA), a horizontal synchronous signal (Hsync), and a vertical synchronous signal (Vsync) are provided to the timing controller 150. The illumination information of the illumination pattern information selected from the illumination pattern storage unit 190 is provided. The backlight driver 160 is provided.

The timing controller 150 receives the gray level data signals R, G, and B data, the horizontal synchronization signal Hsync, and the vertical synchronization signal Vsync, which are received from the outside or provided from the illumination pattern storage unit 190, and are scanned. The scan control signal Sg for controlling the driver 130 and the data control signal Sd for controlling the data driver 120 are output. The timing controller 150 supplies the gray scale data signals R, G, and B data to the gray voltage generator 140.

The scan driver 130 sequentially supplies the scan signal to the scan line S in response to the scan control signal Sg supplied from the timing controller 150 to select a horizontal line to which the data voltage Vd is supplied.

The gray voltage generator 140 generates a gray voltage (data voltage Vd) corresponding to the gray data signals R, G, and B DATA, and supplies the generated data voltage Vd to the data driver 120. do. The data driver 120 supplies the data voltage Vd to the data line D while being controlled by the data control signal Sd.

The backlight 161 is used to apply light to a plurality of pixels, and in the embodiment of the present invention, a high-brightness LED (Light Emitting Device) is used. In general, LCD backlights provide brightness of up to 1500 candelas using four high-brightness LEDs. Some recently developed LCD backlights provide brightness of 2000 candelas with two LEDs. Therefore, if a large number of ultra-bright LEDs that provide more than 1000 candela brightness can be installed, the brightness that can be used for lighting even with the existing power can be obtained.

The backlight driver 160 controls the backlight 161 to output illuminance corresponding to the illuminance information provided from the illumination mode controller 170. In this case, according to the embodiment of the present invention, the backlight driver 160 outputs the backlight 161 to output the illuminance set to the default value in the normal display mode, and illuminance information of the illumination pattern is output from the illumination mode controller 170. When received, the backlight 161 is controlled to output an illuminance corresponding to the illuminance information.

3 is a diagram illustrating pixels of a liquid crystal display according to an exemplary embodiment of the present invention.

An LCD applies an electric field to a liquid crystal material having an anisotropic dielectric constant injected between two substrates, and adjusts the intensity of the electric field to control the amount of light transmitted to the substrate from an external light source (backlight). Get a burn.

Such LCDs are typical of portable flat panel displays, and among them, TFT-LCDs using thin film transistors (hereinafter referred to as TFTs) as switching elements are mainly used.

In the TFT-LCD, each pixel can be modeled by a liquid crystal capacitor because electrodes (pixel electrodes and common electrodes) are disposed to face each other with a liquid crystal interposed therebetween. In such LCDs, each pixel is represented by an equivalent circuit as shown in FIG. 3. Can be.

As shown in FIG. 3, each pixel 111 of the liquid crystal display device includes a TFT T1 having a source electrode connected to the data line Dm, and a gate electrode connected to the scan line Sn, and a TFT (T1). The liquid crystal capacitor Cl is connected between the drain electrode and the common electrode Vcom, and the storage capacitor Cst is connected to the drain electrode of the TFT T1.

The TFT T1 provides the pixel electrode (not shown) with the data voltage Vd supplied from the data line Dm in response to the scan signal from the scan line Sn. The electric field corresponding to the difference between the data voltage provided to the pixel electrode (that is, the pixel voltage Vp and the common voltage Vcom applied to the common electrode (not shown) is equivalent to that of the liquid crystal capacitor (FIG. 3). The liquid crystal adjusts the transmittance of light in response to the intensity of the applied electric field, and the storage capacitor Cst converts the pixel voltage provided to the liquid crystal capacitor Cl to the next data voltage Vd. The light is transmitted for a predetermined time by maintaining it until it is supplied.

Next, a lighting method using a liquid crystal display device implemented in a mobile terminal according to an embodiment of the present invention will be described with reference to FIG. 4.

First, the mobile terminal 100 receives and stores various lighting pattern information from the web server 500 through the mobile communication network 300 and the Internet network 400. At this time, image information such as a still image or a moving image and illuminance information indicating brightness of a backlight are included. As described above, according to the embodiment of the present invention, since the lighting pattern information which is variously updated can be received and stored from the web server 500, there is an advantage of displaying the lighting pattern information according to the user's preference.

Then, the illumination mode controller 170 determines whether the operation mode of the liquid crystal display of the mobile terminal is the illumination mode (ie, the normal display mode). In this case, the liquid crystal display of the mobile terminal is basically set to the general display mode, and is switched to the illumination mode by a user's manipulation (input of a function key, not shown).

As a result of the determination in step S110, in the lighting mode, the lighting pattern selector 180 may provide lighting pattern information desired by the user from the lighting pattern storage unit 190 in response to a user's manipulation (input of a function key, not shown). Select. (S120)

In addition, the illumination mode controller 170 extracts image information and illuminance information from the illumination pattern information selected from the illumination pattern storage unit 190, and (S130) a timing controller for the grayscale data signal and the synchronization signal corresponding to the extracted image information. To allow the LCD panel to be driven. In addition, the illumination mode controller 1700 provides the extracted illumination information to the backlight driver 160 to drive the backlight with the illumination corresponding to the illumination information (S150) In this case, the illumination included in each illumination pattern information The size of is set differently depending on the lighting pattern.

On the other hand, when the operation mode is the normal display mode as a result of the determination in step S110, the LCD panel is driven by providing the gradation data signal and the synchronization signal corresponding to the image signal received from the outside to the timing controller. Be sure to In this case, the backlight driver 160 allows the backlight to be driven at a predetermined illuminance (set to a lower value than illuminance in the illumination mode).

According to this embodiment of the present invention, the liquid crystal display device mounted on the mobile terminal can be driven as a lighting device in response to various lighting pattern information having image information and illuminance information, so it is necessary to carry a separate lighting device. There is no advantage.

In addition, according to an embodiment of the present invention, since it is possible to receive and store various lighting pattern information from a web server, there is an advantage in that it is possible to display a lighting pattern suitable for a user's preference.

Although the preferred 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.

For example, in the above-described embodiment of the present invention, the mobile terminal receives and stores various lighting pattern information from a web server through a mobile communication network and an internet network as an example. (Not shown) may receive various lighting pattern information, and the mobile terminal may be provided through a personal computer through a communication interface such as USB.

In addition, in the above embodiment, a TFT LCD is described as an example of a display device mounted on a mobile terminal. In addition, a simple matrix type liquid crystal display device may be used.

As described above, according to the present invention, since the display device mounted on the mobile terminal can be driven as a lighting device in response to various lighting pattern information, there is no need to carry a separate lighting device. In addition, according to the present invention, since it is possible to receive and store various lighting pattern information from the web server, there is an advantage that can display the lighting pattern according to the user's preference.

Claims (9)

In the display device mounted to a mobile terminal, A display panel including a plurality of pixels; A backlight for applying light to each pixel; A backlight driver which controls an output illuminance of the backlight;  An illumination pattern storage unit for storing a plurality of illumination pattern information each having image information and illuminance information corresponding to the image information; And It is determined whether the display device of the mobile terminal operates in the illumination mode or the normal display mode. When the display device of the mobile terminal operates in the illumination mode, image information included in the illumination pattern information selected from the illumination pattern storage unit is used. And an illumination mode controller configured to drive the display panel and provide illumination information included in the selected illumination pattern information to a backlight driver. The method of claim 1, The illumination mode controller is configured to drive the display panel with image information received from the outside when the display device of the mobile terminal operates in the normal display mode, and the backlight driver drives the backlight with the illuminance set for the normal display mode. Display device of a mobile terminal, characterized in that. The method of claim 2, And a lighting pattern selector configured to select one of various lighting pattern information stored in the lighting pattern storage in response to a user's selection. The method according to any one of claims 1 to 3, A driver for driving the pixels of the display panel; And Control signals and gradation data for controlling the driver by receiving an image signal received from the outside through the illumination mode controller or provided from the illumination pattern storage unit, wherein the image signal includes a gradation data signal and a synchronization signal. And a timing controller for outputting a signal. The method according to any one of claims 1 to 3, And at least one of a plurality of pieces of lighting pattern information stored in the lighting pattern storage unit is received from a web server providing lighting pattern information. In the illumination method using a display device of a mobile terminal comprising a display panel, a backlight and a backlight driver, determining whether an operation mode of the display device of the mobile terminal is an illumination mode or a general display mode; (b) a lighting pattern desired by a user from the plurality of lighting pattern information stored in the display device of the mobile terminal, wherein the lighting pattern information includes image information and illuminance information when the lighting mode is determined in step (a); Selecting information; (c) extracting image information and illuminance information from the selected illumination pattern information; And (d) driving the display panel based on the gray scale data and the synchronization signal corresponding to the extracted image information, and driving the backlight with a first illuminance corresponding to the extracted illuminance information. Lighting method using display device. The method of claim 6, When it is determined in the normal display mode in the step (a), the display panel is driven based on the gray level data signal and the synchronization signal corresponding to the image signal received from the outside, and the backlight is driven by the second illuminance set to the normal display mode. Illumination method using a display device of a mobile terminal further comprising the step of driving. The method of claim 7, wherein And the second illuminance is set lower than the first illuminance. The method according to any one of claims 6 to 8, Receiving at least one lighting pattern information from a web server providing a plurality of lighting pattern information before the step (a), and storing the information on the display device of the mobile terminal, the illumination using the display device of the mobile terminal Way.

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