KR101818474B1 - Portable image display device available optical sensing and method for driving the same - Google Patents

Abstract

The present invention relates to a portable image display device capable of performing optical proximity sensing so that self-functions of a portable video display device and a touch recognition function can be performed without interference with each other, The present invention relates to a portable video display device capable of being sensed and a method of driving the same, the video display panel being divided into a video display part for displaying an image and a video non-display part; A panel driver for driving gate lines and data lines of the image display unit so that image data can be displayed on a screen using at least one synchronization signal; And an optical sensing module for detecting a touch position or motion on the image display panel using an optical detection sensor formed on a circuit film separate from the at least one light emitting device formed in the image non-display portion.

Description

TECHNICAL FIELD [0001] The present invention relates to a portable image display device capable of optical sensing, and a driving method thereof. [0002]

The present invention relates to a portable image display device capable of performing optical proximity sensing so that self-functions of a portable video display device and a touch recognition function can be performed without interference with each other, To a portable video display device capable of being sensed and a driving method thereof.

2. Description of the Related Art Recently, a flat panel display used for a mobile terminal, a personal computer, and a monitor of various information devices has been widely used as a liquid crystal display (LCD) or an organic light emitting diode display .

Among them, a liquid crystal display device and an organic light emitting diode display device are mainly used for a mobile device. In the case of a liquid crystal display device, an image is displayed by controlling the light transmittance of a liquid crystal using an electric field. To this end, the liquid crystal display device includes a liquid crystal module in which pixel regions are arranged, a driving circuit for driving the liquid crystal panel, and a liquid crystal module in which a backlight unit for irradiating light to the liquid crystal panel is assembled.

Meanwhile, the organic light emitting diode display device includes an AMOLED (Active Matrix Organic Light Emitting Diode) panel, which is a display panel capable of self-emission, and a light emitting display module in which a driving circuit for driving the AMOLED panel is assembled And displays an image.

In recent years, portable video display devices such as smart phones and tablet PCs have been preferred, so that a touch function has been applied to a portable video display device. Conventionally, a pressure sensitive type touch sensor or an electrostatic type touch sensor is additionally formed on a display panel of an image in a flat plate shape.

However, when the above-described pressure sensitive or electrostatic touch sensors are used, the thickness of the portable video display device including the image display panel has to be increased since the pressure sensitive or electrostatic touch sensors have to be applied in a flat plate shape. I had to do it. In addition, touch recognition during a call has caused unnecessary problems. In order to prevent this, a call function, a variety of mobile phone self-executing functions, and a touch function have to be separately implemented, thereby causing other unnecessary problems.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a portable video display device capable of performing optical proximity sensing so as to perform its own functions and a touch recognition function without interfering with each other, And an object of the present invention is to provide a portable video display device and a method of driving the same that can realize an optical sensing of a product more slimly.

According to an aspect of the present invention, there is provided a portable video display device including an image display unit for displaying an image and an image display panel separated by an image non-display unit; A panel driver for driving gate lines and data lines of the image display unit so that image data can be displayed on a screen using at least one synchronization signal; And an optical sensing module for detecting a touch position or motion on the image display panel using an optical detection sensor formed on a circuit film separate from the at least one light emitting device formed in the image non-display portion.

The at least one light emitting device may include a white light emitting diode and may be mounted at three corners of the image non-display portion. The light detecting sensor may be formed on the image non-display portion or may be mounted on a circuit film separately from the light emitting device, And the optical sensing module is mounted on the circuit film.

The optical sensing module detects touch coordinates or motion by distinguishing signal levels according to reflection intensities received by the photodetection sensors by reflecting different light sources emitted from the respective light emitting elements on an object on the image display panel .

The optical sensing module senses a change in illuminance through an illuminance sensor of an infrared printing hole formed in a case or a cover glass, and reflects the change in the sensed reflection intensity.

According to another aspect of the present invention, there is provided a method of driving a portable video display device including a video display unit and an image display unit, The method comprising: driving gate lines and data lines of the image display unit so that image data can be displayed on a screen; And detecting a touch position or motion on the image display panel using the at least one light emitting element, the light detection sensor, and the optical sensing module.

The at least one light emitting device may include a white light emitting diode and may be mounted at three corners of the image non-display portion. The light detecting sensor may be formed on the image non-display portion or may be mounted on a circuit film separately from the light emitting device, And the optical sensing module is mounted on the circuit film.

Wherein the step of detecting a touch position or a motion on the image display panel comprises the steps of: detecting a light source emitted from each of the light emitting elements using the optical sensing module, reflected by an object on the image display panel, And the touch coordinate or motion is detected by distinguishing the signal level according to the reflection intensity.

The step of detecting a touch position or motion on the image display panel may include sensing a change in illuminance through an illuminance sensor of an infrared printing hole formed in a case or a cover glass and reflecting the change in the sensed reflection intensity.

The optical sensing device and the driving method of the present invention having various technical features as described above enable the optical proximity sensing in the portable image display device to be performed so that the self- So that they can be performed without interfering with each other. In addition, since the optical proximity sensor is applied separately from the image display unit, the product can be slipped without affecting the noise.

1 is a perspective view schematically showing a portable liquid crystal display device according to an embodiment of the present invention.
FIG. 2 is a circuit configuration diagram specifically showing the portable liquid crystal display device shown in FIG. 1. FIG.
3 is a view for explaining a touch position coordinate detection method of the optical sensing module shown in FIG.

Hereinafter, a portable video display device capable of optical sensing according to an embodiment of the present invention and a driving method thereof will be described in detail with reference to the accompanying drawings.

As a portable video display device, a plasma display panel (PDP) and a field emission display (PDP) may be used in addition to a flat panel type liquid crystal display device and an organic light emitting diode display device. The technical features according to the present invention can be applied to all the flat panel display devices, but an example applied to the liquid crystal display device will be described below for convenience of explanation.

1 is a perspective view schematically showing a portable liquid crystal display device according to an embodiment of the present invention. FIG. 2 is a circuit diagram showing the portable liquid crystal display device shown in FIG. 1 in detail.

The portable liquid crystal display device shown in Figs. 1 and 2 includes a liquid crystal panel 2 divided into an image display portion 2a for displaying an image and an image non-display portion 2b; A power supply unit for supplying various driving voltages required for driving the liquid crystal panel 2; A panel driver 8 for driving gate lines GL1 to GLn and data lines DL1 to DLm of the image display unit 2a so that image data can be displayed as an image using at least one synchronization signal; And at least one light emitting element 3 formed on at least one corner of the image display area 2b and a light detecting sensor 4 formed on a circuit film 10 separate from the liquid crystal panel 2, And an optical sensing module 6 for detecting motion.

The liquid crystal panel 2 is disposed on the front surface of the backlight so as to adjust the transmittance of light from the backlight to display an image. To this end, the liquid crystal panel 2 has a liquid crystal formed between a lower substrate and an upper substrate, a lower substrate, and an upper substrate, and a spacer for maintaining a constant distance between the lower substrate and the upper substrate. Further, although not specifically shown, the upper substrate includes a color filter; Black matrix; And a common electrode.

The lower substrate includes a thin film transistor (TFT) formed for each cell region defined by the data lines DL1 to DLm and the gate lines GL1 to GLn, and a pixel electrode connected to the TFT. The TFT switches an image signal supplied from the data lines DL1 to DLm to the pixel electrode in response to the gate-on voltage supplied from the gate lines GL1 to GLn. Here, the common electrode formed on the upper substrate may be formed on the lower substrate depending on the mode of the liquid crystal.

A non-display region 2b of the lower substrate is provided with a pad region connected to each of the gate and data lines. In this pad region, a panel driving unit 8 for supplying a gate signal to the gate lines GL1 to GLn while supplying an image signal to the data lines DL1 to DLm is mounted on the circuit film 10 mounted in the form of an integrated circuit, Respectively.

The circuit film 10 may be a tape carrier package or a chip on film. The circuit film supplies an image signal outputted from the panel driving section 8 to each of the data lines DL1 to DLm and supplies a gate signal to each of the gate lines GL1 to GLn. Therefore, in the case of the circuit film 10, the liquid crystal panel 2 and the backlight unit are extended from the pad area in a state where the panel driving unit 8 is attached, Circuit board or the like. On the other hand, the panel driving unit 8 may be mounted on the lower substrate by a chip on glass method. In this case, the panel driver 8 mounted on the lower substrate is supplied with a data signal, a gate signal, or the like from a separate data printed circuit board through the circuit film 10.

The panel driving unit 8 itself generates gate control signals for driving the gate lines GL1 to GLn by using a self-generated synchronization signal, and sequentially generates and outputs gate-on signals using the gate control signals. Here, the gate-off voltage is supplied during a period in which the gate-on voltage is not supplied to the gate lines GL1 to GLn. In addition, the panel driver 8 converts the digital image data input from the outside or stored in the external device into an analog voltage, that is, an analog data voltage, using a synchronization signal. At this time, the panel driver 8 converts the digital image data into the analog data voltage using the subdivided gamma voltage set corresponding to the gradation value of the digital image data. Then, the converted data voltages are supplied to the data lines DL1 to DLm. Specifically, the panel driver 8 latches digital image data (RGB) that is stored in itself or input from the outside, and then supplies the gate signal to each of the gate lines GL1 to GLn in units of one horizontal line per one horizontal period To the respective data lines DL1 to DLm.

The power supply unit supplies various driving voltages required for driving the liquid crystal panel 2 and the panel driving unit 8 such as a common voltage, a positive driving voltage, a negative or ground voltage, a DC reference voltage, (2) and the panel driving unit (8).

FIG. 3 is a view for explaining a touch position coordinate detection method of the optical sensing module shown in FIG. 2. FIG.

The optical sensing module 6 shown in FIG. 3 is based on a concept that an optical sensing module is formed on the surface of a liquid crystal panel 2 on which an image is displayed. For this purpose, The light intensity of the light is detected using the light detection sensor 4, and the touch coordinates or motion are detected through the detected reflection intensity.

At least one light emitting element 3 may be a white light emitting diode and is most preferably mounted on each of the three corners of the image non-display portion 2b as shown in FIG. The light detection sensor 4 may be formed on the image non-display portion 2b or may be mounted on the circuit film 10 separately from the light emitting elements 3. Accordingly, the optical sensing module 6 can detect the intensity of the light reflected from the object on the liquid crystal panel 2 by the different light sources emitted from the respective light emitting elements 3, By detecting the level, touch coordinates or motion are detected. That is, the optical sensing module detects touch coordinates or motion by triangling the deviation of the reflection intensity received by the light detection sensor 4 with the position of each light emitting element 3. Specifically, the distance between the light detection sensor 4 and the touch position, that is, the vertical coordinate, can be detected by the reflection intensity received by the light detection sensor 4, and the direction in which the reflection intensity is recognized by the light detection sensor 4 And the position of each light emitting element 3 can be recognized.

On the other hand, in order to more precisely detect the positional coordinates of the optical sensing module, an infrared printing hole may be applied to a case or a cover glass to detect a change in illuminance through an illuminance sensor. In other words, the positional coordinate detection error can be reduced by sensing the change in the intensity detected through the infrared printing hole and reflecting the detected intensity variation in the optical detection sensor 4.

As described above, since the optical proximity sensing is performed in the portable video display device according to the present invention, the self-functions of the portable video display device and the touch recognition function are interfered with each other Without having to do so. In addition, since the optical proximity sensor is applied separately from the image display unit, the product can be slipped without affecting the noise.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Will be clear to those who have knowledge of.

Claims (8)

A video display panel divided into a video display part for displaying an image and a video non-display part;
A panel driver for driving gate lines and data lines of the image display unit so that image data can be displayed on a screen using at least one synchronization signal; And
An optical sensing module for detecting a touch position or motion on the image display panel using at least one light emitting element disposed in the image non-display portion and an optical detection sensor disposed on the image non-display portion or mounted on a separate circuit film, Respectively,
Wherein the light detection sensor senses a reflection intensity of light generated in the at least one light emitting element,
The optical sensing module
An optical sensing portable image sensing a change in illuminance through an illuminance sensor of an infrared printing hole disposed in a case or a cover glass and detecting a touch position or a motion by reflecting the detected illuminance change to a reflected intensity detected by the photo- Display device. The method according to claim 1,
Wherein the at least one light emitting element is composed of a white light emitting diode and mounted on three corners of the image non-
The light detection sensor is mounted on the circuit film separately from the light emitting elements,
Wherein the optical sensing module is mounted on the circuit film. 3. The method of claim 2,
The optical sensing module
A plurality of different light sources emitted from each of the light emitting devices are reflected by an object on the image display panel to distinguish signal levels according to the reflection intensity received by the light detection sensor, Video display device. delete A driving method of a portable video display device capable of optically sensing an image through a video display panel divided into a video display part and a video non-display part,
Driving gate lines and data lines of the image display unit so that image data can be displayed on a screen; And
Detecting a touch position or motion on the image display panel using at least one light emitting element, an optical detection sensor, and an optical sensing module,
Wherein the light detection sensor senses a reflection intensity of light generated in the at least one light emitting element,
The step of detecting a touch position or motion on the image display panel
A portable image capable of detecting the touch position or motion by sensing a change in illuminance through an illuminance sensor of an infrared printing hole disposed in a case or a cover glass and reflecting the detected change in illuminance on the reflected intensity of the light detected by the light detection sensor A method of driving a display device. 6. The method of claim 5,
Wherein the at least one light emitting element is composed of a white light emitting diode and mounted on three corners of the image non-
Wherein the light detecting sensor is formed on the image non-display portion or mounted on a circuit film separately from each light emitting element,
Wherein the optical sensing module is mounted on the circuit film. The method according to claim 6,
The step of detecting a touch position or motion on the image display panel
The light sources emitting different light sources emitted from the respective light emitting elements are reflected by an object on the image display panel using the optical sensing module and the signal levels are classified according to the reflection intensity received by the light detecting sensor, And a driving method of the portable video display device. delete

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