KR100981420B1 - Mobile Phone having Function of Camera Flash, Method for Controlling of Camera Flash in Mobile Phone, Liquid Crystal Display having Function of Camera Flash in Mobile Phone - Google Patents

Abstract

The present invention relates to a mobile communication terminal, and more particularly to a mobile communication terminal having a camera flash function. The present invention provides a liquid crystal display device of a mobile communication terminal having a camera function and a backlight liquid crystal display function, the liquid crystal display device comprising: a backlight light emitting diode; A light emitting diode for flash; A light guide plate for reflecting light generated by at least one of the light emitting diodes; And a liquid crystal display for emitting the reflected light to the outside.

Mobile communication terminal, camera, flash, liquid crystal display

Description

A mobile communication terminal having a camera flash function, a camera flash control method of the mobile communication terminal, a liquid crystal display device of a mobile communication terminal having a camera flash function [Mobile Phone having Function of Camera Flash, Method for Controlling of Camera Flash in Mobile Phone, Liquid Crystal Display having Function of Camera Flash in Mobile Phone}

1 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

2 is a block diagram of a liquid crystal display device according to an embodiment of the present invention.

3 is a flow chart for executing a flash using the liquid crystal display according to an embodiment of the present invention.

4 is an example of a flash operation in accordance with one embodiment of the present invention.

The present invention relates to a mobile communication terminal, and more particularly to a mobile communication terminal having a camera flash function.

As digital cameras become popular, mobile communication terminals equipped with cameras are also becoming popular. In general, the flash is used to supplement or adjust the amount of light when taking pictures in a dark room where the amount of natural light is insufficient or at night, or when taking pictures by adjusting the amount of light. Shooting with the flash always achieves consistent brightness and light quality. The flash is classified into an external type and an internal type according to a method installed in the camera.

Similarly, the above-described flash device and function are applied to the mobile communication terminal equipped with a camera. Therefore, when the external flash is used, the user has to carry it separately, and additional flash components that can perform the flash function must be added even when the internal flash is used, and a space is required inside the mobile terminal. There is a problem.

The present invention has been made to solve the above problems, and an object thereof is to enable a liquid crystal display device provided in a mobile communication terminal to be used as a flash.

Furthermore, another object of the present invention is to add a light emitting diode for flash to a liquid crystal display of a mobile communication terminal so as to use a light guide plate provided in advance.

Furthermore, another object of the present invention is to enable a brighter light when using a flash by using a backlight light emitting diode included in a liquid crystal display of a mobile communication terminal.

According to an aspect of the present invention for achieving the above object, the present invention provides a liquid crystal display device of a mobile communication terminal having a camera function and a backlight liquid crystal display function, the liquid crystal display device comprising: a backlight light emitting diode; A light emitting diode for flash; A light guide plate for reflecting light generated by at least one of the light emitting diodes; And a liquid crystal display for emitting the reflected light to the outside.

Accordingly, the flash operation may be performed using an existing light guide plate of the liquid crystal display by adding only the flash light emitting diode to the liquid crystal display of the mobile communication terminal without installing a separate device to perform the flash function.

According to a further aspect of the invention, the present invention is characterized in that the light guide plate, in the camera flash mode reflects the backlight light and the flash light generated by the light emitting diode, respectively.

Accordingly, since the light guide plate reflects the backlight light and the flash light together to serve as a flash, the light guide plate may perform a flash function with brighter light than when only the flash light is used.

According to another aspect of the present invention, the present invention provides a liquid crystal display device of a mobile communication terminal having a camera function and a backlight liquid crystal display function, comprising at least one of a backlight light emitting diode, a flash light emitting diode and a light emitting diode; A liquid crystal display including a light guide plate for reflecting generated light and a liquid crystal display for emitting the reflected light to the outside; And a controller configured to control ON / OFF of the backlight LED and the flash LED.

Accordingly, the flash operation may be performed using an existing light guide plate of the liquid crystal display device by adding only the flash light emitting diode to the liquid crystal display device of the mobile communication terminal without installing a separate device to perform the flash function. You won't have to carry the flash separately or need extra space inside your device.

According to a further aspect of the present invention, the voltage conversion unit for boosting the voltage of the terminal battery power supply to the driving voltage of the LED for the flash; further comprises.

Accordingly, the intensity of light emitted from the flash LED can be adjusted to be suitable for performing the flash function.

According to another aspect of the present invention, a mobile communication terminal having a backlight liquid crystal display function and a flash function in which light generated by at least one of the backlight light emitting diode and the flash light emitting diode is reflected on the light guide plate and output to the outside through the liquid crystal display unit. A camera flash control method comprising the steps of: checking for a flash mode setting request; Setting a flash mode in response to the flash mode setting request; And generating a flash light by turning on the flash light emitting diode (ON) when an image capturing command is input in a flash mode.

Accordingly, the flash operation may be performed using an existing light guide plate of the liquid crystal display device by adding only the flash light emitting diode to the liquid crystal display device of the mobile communication terminal without installing a separate device to perform the flash function. You do not have to carry the flash separately or need extra space inside the device.

This, a further additional aspect of the present invention will become more apparent through the preferred embodiments described below with reference to the accompanying drawings. Hereinafter, the present invention will be described in detail to enable those skilled in the art to easily understand and reproduce the present invention. In addition, in describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, a detailed description thereof will be omitted.

1 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

Referring to FIG. 1, the RF unit 10 performs a radio processing of signals transmitted and received between base stations. For example, the RF unit 10 shifts the baseband transmission signal to a high frequency for wireless output (may go through an intermediate frequency conversion step), amplifies it, and wirelessly outputs the antenna through the antenna ANT. The high frequency signal received from the antenna is shifted to the baseband (which may go through an intermediate frequency conversion step).

The control unit 12 demodulates the received radio signal, modulates the corresponding transmission signal, and transmits the modulated signal to the RF unit 10. The controller 12 performs a modulation / demodulation operation in a manner preset for mobile communication. For example, the control unit 12 may perform a CDMA modulation / demodulation operation such as channel coding / decoding and orthogonal code / decoding. The controller 12 basically controls the overall operation of the terminal based on the control program data stored in the memory 18. For example, the controller 12 controls a control signal for using the liquid crystal display 20 as a flash when photographing a camera. The output is transmitted to the liquid crystal display device 20. The controller 12 may also be referred to as MSM chip, as is already known.

The voice signal processor 14 performs a process including voice encoding on a voice signal input through a microphone MIC according to an operation mode, and transmits the voice signal to the controller 12 or will be described later under the control of the controller 12. It may also be transferred to the voice memory 16. In addition, the voice signal processor 14 may perform a process including voice decoding on the demodulated voice signal through the controller 12 and output the same through the speaker SPK. In general, the voice signal processor 14 includes a firmware module including an analog circuit such as an amplifier and a filter, and an analog / digital conversion circuit, a digital / analog conversion circuit, and a voice compression / extension module.

The voice memory 16 is accessed and controlled by the controller 12, and a plurality of voice messages are stored.

On the other hand, the memory 18 is divided into a ROM area in which control program data for controlling the operation of the terminal is stored and a RAM area in which data generated during the terminal control operation are temporarily stored, and is controlled by the controller 12. In particular, the memory 18 stores control program data for controlling the flash operation according to the present invention.

The liquid crystal display device 20, which is one of the user interface units, displays text data generated by the controller 12, a background screen, and the like.

The key input unit 22, which is another user interface unit, includes a plurality of numeric keys and a plurality of function keys for dial and address designation, and generates key data for each key button press and transmits the generated key data to the controller 12.

The camera unit 26 captures an image and transmits the captured image signal to the controller 12 by performing a process including image encoding.

2 is a block diagram of a liquid crystal display according to an exemplary embodiment of the present invention. Hereinafter, a description will be given with reference to FIGS. 1 and 2.

Liquid crystal display device 20 according to an embodiment of the present invention includes a backlight light emitting diode 52; A flash light emitting diode 50; A light guide plate 54 for reflecting light generated by at least one of the light emitting diodes 50 and 52; And an external liquid crystal display 56 for emitting the reflected light to the outside.

The backlight LED 52 generates light according to the control signal 66b of the controller 12. The generated light is reflected by the light guide plate 54 and emitted to the outside through the external liquid crystal display 56. For reference, the external liquid crystal display 56 is directly controlled according to the control signal 66e of the controller 12 to display character or numeric data generated by the controller 12.

For reference, the light introduced into the light guide plate 54 is transmitted to the inside of the light guide plate 54 through total reflection, and a scattering pattern is installed on the rear surface of the light guide plate 54 so that the light hit by the light is diffused forward. In this case, the density distribution of the scattering pattern on the rear surface of the light guide plate 54 is adjusted to achieve maximum brightness while maintaining the uniformity of the light distribution emitted to the front of the light guide plate 54.

The liquid crystal display device of the mobile communication terminal having such a backlight liquid crystal display function is a known technique.

The present invention provides a liquid crystal display device 12 capable of performing a flash function by adding a flash light emitting diode 50 to the existing liquid crystal display device so as to use the existing light guide plate 54 together.

The flash LED 50 generates light according to the control signal 66a of the controller 12. The control signal 66a is generated when the user presses a button designated as a camera shutter to capture an image. The generated light is reflected by the light guide plate 54 and emitted to the outside through the external liquid crystal display 56 to perform a flash function. The flash LED 50 is used as a light emitting diode capable of generating high brightness light suitable for performing a flash function.

Referring to the non-described reference numerals, the internal backlight LED 60 generates light according to the control signal 66d of the controller 12. The generated light is reflected by the internal light guide plate 62 and emitted to the outside through the internal liquid crystal display 64. The liquid crystal display controller 58 is controlled by the control signal 66c of the controller 12. The liquid crystal display controller 58 may also temporarily write text or numeric data generated by the controller 12 into the RAM and display the internal liquid crystal display 64 through the control signal 66f. Typically, the internal liquid crystal display unit 64 is controlled by the liquid crystal display control unit 58, and the external liquid crystal display unit 56 is directly controlled by the control signal 66e of the control unit 12.

Here, the internal liquid crystal display 64 refers to an internal screen that appears when a folder is opened in the case of a folder type mobile communication terminal, and refers to a screen displaying a large amount of data such as a background screen, a menu, and text data. In addition, the external liquid crystal display 56 refers to a screen located outside the terminal and displays relatively less data on the screen than the internal liquid crystal display 64. For example, the external liquid crystal display 56 displays a numeric display of the current time or caller information when a call is received, so that the user does not need to open a folder and check the information through the internal liquid crystal display 64. You can check it. Typically, the internal liquid crystal display unit 64 is controlled by the liquid crystal display controller 58, and the external liquid crystal display unit 56 is directly controlled by the controller 12.

Although the flash function has been described as being performed through the external liquid crystal display unit 56, the flash light emitting diode 50 uses the internal light guide plate 62 to perform the flash function through the internal liquid crystal display unit 64. It may be.

According to an additional aspect of the present invention, in the flash mode, the light emitted from the backlight LED 52 and the flash LED 50 is reflected together by the light guide plate 54 according to the respective control signals 66a and 66b. Emitted through the liquid crystal display 56 to perform a flash function. That is, the light generated from the backlight LED 52 by the control signal 66b and the light generated by the flash LED 50 by the control signal 66a interfere with the light guide plate 54 to provide a brighter flash function. Will perform.

According to another aspect of the present invention, a mobile communication terminal includes a light guide plate reflecting light generated by at least one of a backlight light emitting diode 52, a flash light emitting diode 50, and the light emitting diodes 50 and 52 ( A liquid crystal display (12) comprising an external liquid crystal display (56) for emitting the reflected light to the outside; And a control unit 12 for controlling ON / OFF of the backlight LED 52 and the LED 50 for flash, respectively.

In a conventional liquid crystal display, the control unit 12 outputs control signals 66b and 66d so that the backlight light emitting diodes 52 and 60 generate light. As described above, the generated light is reflected by the light guide plates 54 and 62 and emitted to the outside through the liquid crystal display units 56 and 64. A flash light emitting diode 50 is added to the liquid crystal display, and the control unit 12 uses the control program data for controlling the flash operation stored in the memory 18 to control the flash through the control signal 66a. The light emitting diode 50 is controlled to perform the flash function as described above.

As described above, the controller 12 outputs the control signal 66e to display character or numeric data on the external liquid crystal display 56, and outputs the control signal 66c to the liquid crystal display controller 58. To control. Then, the liquid crystal display controller 58 temporarily writes character or numeric data generated by the controller 12 into the RAM and displays the internal liquid crystal display 64 through the control signal 66f.

The mobile communication terminal according to an additional aspect of the present invention further includes a voltage converter (not shown) for boosting the voltage of the terminal battery power supply to a voltage suitable for driving the flash LED 50. For example, when the voltage required for the flash LED 50 is 4.2V, the voltage from the terminal battery may be lower than this, so that a voltage converter for boosting the voltage is required. The voltage converter may be located outside the liquid crystal display 20. In addition, the voltage conversion unit for boosting the voltage required by the backlight LED 52 may be provided inside or outside the liquid crystal display device 20. The construction method of the voltage conversion section for controlling the conversion of the voltage supplied to the backlight LED 52 is a known technique.

3 is a flowchart of a flash using the liquid crystal display according to the exemplary embodiment of the present invention. Hereinafter, a description will be given with reference to FIG. 3.

The user requests a flash mode setting through the key input unit 22 (step 80). Then, the controller 12 sets the flash mode according to the flash mode setting request (step 82). The user requests the backlight LED 52 to generate light through the key input unit 22 (step 84). Then, the controller 12 outputs the control signal 66b so that the backlight LED 52 generates light (step 86). Light generated by the backlight LED 52 is reflected by the light guide plate 54 and emitted to the outside through the external liquid crystal display 56. If there is no setting request of the backlight LED 52 in step 84, the process proceeds to step 88 to be described later.

The user requests a flash operation through the key input unit 22 (step 88). This request occurs when the user presses a button designated by the camera shutter to capture an image. Then, the control unit 12 outputs a control signal 66a so that the flash LED 50 generates light.

In this case, the flash light emitting diode 50 may be turned on at an interval of 100 ms to operate as a flash. The first ON is pre-luminous and the second ON is main luminescence. 4 illustrates the flash operation described above. Such flash operation is a known technique.

Light generated by the flash LED 50 is reflected by the light guide plate 54 and emitted through the external liquid crystal display 56 (step 90).

On the other hand, if the user requests to release the flash operation mode (step 92), the control unit 12 releases the flash operation mode but repeats steps 84 to 90 as described above until the flash operation mode is released.

According to a further aspect of the present invention, the backlight LED 52 performs a flash function together with the flash LED 50.

When the above-described flash mode setting is made (step 82), the backlight LED 52 automatically turns on to perform the flash function when the flash LED 50 is controlled on. Can be. Alternatively, the ON function of the backlight LED 52 and the flash LED 50 may be controlled at the same time to perform the flash function.

According to a further aspect of the present invention, the method further includes boosting the voltage of the terminal battery power supply to the driving voltage of the flash LED.

When the control unit 12 outputs a control signal 66a for turning on and off the flash LED 50, the voltage of the terminal battery power is supplied to the flash LED 50. At this time, the voltage converting unit (not shown) boosts the supplied voltage to a voltage suitable for driving the flash LED 50. Therefore, the flash LED 50 generates light suitable for performing a flash function.

As described above, the present invention does not need to install a separate device in order to perform a flash function, and only a flash light emitting diode is added to a liquid crystal display of a mobile communication terminal to perform a flash operation using a conventional light guide plate of a liquid crystal display. This can be done and requires no flash or additional space inside the terminal.

In addition, since the light guide plate reflects the backlight light and the flash light together to serve as a flash, the light guide plate can perform a flash function with brighter light than when only the flash light is used.

In addition, the intensity of light emitted from the flash LED can be adjusted to be suitable for performing the flash function.

On the other hand, the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Accordingly, the true scope of the present invention should be determined only by the appended claims.

Claims (8)

delete In the liquid crystal display device of a mobile communication terminal having a camera function and a backlight liquid crystal display function, The liquid crystal display device, A backlight light emitting diode; A light emitting diode for flash; A light guide plate for reflecting light generated by at least one of the light emitting diodes; Including; the liquid crystal display for emitting the reflected light to the outside; The light guide plate, And a flash function reflecting backlight light and flash light generated by the light emitting diodes in the camera flash mode. delete In the liquid crystal display device of a mobile communication terminal having a camera function and a backlight liquid crystal display function, A liquid crystal display comprising a backlight light emitting diode, a flash light emitting diode, a light guide plate reflecting light generated by at least one of the light emitting diodes, and a liquid crystal display unit emitting the reflected light to the outside; It includes a control unit for controlling the (ON) / off (OFF) of the backlight LED and the flash LED, respectively, The control unit, In camera flash mode, And controlling the backlight LED and the flash LED. The method according to claim 4, A voltage conversion unit for boosting a voltage of a terminal battery power supply to a driving voltage of the flash light emitting diode; Mobile communication terminal, characterized in that. delete In the camera flash control method of a mobile communication terminal having a liquid crystal display function and a flash function that the light generated by at least one of a backlight light emitting diode and a flash light emitting diode is reflected from the light guide plate and output to the outside through the liquid crystal display, Checking whether there is a flash mode setting request; Setting a flash mode in response to the flash mode setting request; And generating a flash light by turning on the flash light emitting diode (ON) when an image capturing command is input in a flash mode. The light generating step, And controlling the backlight LED to generate backlight light further. The method of claim 7, And boosting a voltage of a terminal battery power supply to a driving voltage of the flash light emitting diode.

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