KR20110065718A - Image display device using light detection screen and driving method thereof - Google Patents

Abstract

The present invention relates to an image display apparatus using a light detection screen and a method of driving the same, which enable various contents of the image display apparatus to be used by using the optical detection screen and further increase the utilization of the large screen image display apparatus. A display panel including a plurality of pixel areas to display an image; A plurality of drivers for driving the display panel; A light detection screen having a plurality of light detection sensors arranged in a matrix form and formed on a front surface of the display panel; A remote controller having a light output unit configured to emit light to the light detection screen; A sensor driver which detects an amount of light emitted from the remote controller and applied to the plurality of light detection sensors to generate a light detection signal; A light detection controller for calculating position data to which light from the remote controller is applied according to the light detection signal and generating a plurality of coordinate information corresponding to the calculated position data; And a timing controller configured to control the light detection controller, the sensor driver, and the plurality of drivers to display image data from the outside and an image corresponding to the plurality of coordinate information on the display panel.

Description

IMAGE DISPLAY DEVICE USING LIGHT DETECTING SCREEN AND AND DRIVING METHOD THEREOF

The present invention relates to an image display device, and more particularly, to an image display device using a light detection screen, which makes it possible to use various contents of the image display device using a light detection screen and to further increase the utilization of the large screen image display device. And a driving method thereof.

Recently, flat panel displays are emerging as liquid crystal displays, field emission displays, plasma display panels, and organic light emitting diode displays. Emitting Display).

These flat panel display devices are actively applied to laptops, desktop monitors, and mobile terminals due to their excellent resolution, color display, and image quality. In particular, an active matrix liquid crystal display or an organic light emitting diode display in which switching elements are formed in each pixel area is very suitable for displaying moving images. Accordingly, a touch sensor, an optical detection sensor, a small camera, and the like are further added to a liquid crystal display device and an organic light emitting diode display device to commercialize a variety of contents.

Of course, the liquid crystal display or the organic light emitting diode display may be used as a large-screen video display device, that is, a large TV or a monitor. However, the conventional large-screen video display device may be used by a user in addition to a function of displaying an image. The content is very limited.

In other words, in the related art, a hardware such as a separate game machine or a video system may be further configured on a large screen display device to display an image related thereto, or only a function of selecting limited content using a conventional remote controller may be used. There was no. Accordingly, in the case of a video display device displaying an image of a large screen, it is desirable that the video display device be developed so that various contents can be used only by its own function or configuration.

The present invention is to solve the above problems, the image using the light detection screen to enable the use of a variety of contents of the image display device using the light detection screen and to further increase the utilization of the large screen image display device It is an object of the present invention to provide a display device and a driving method thereof.

According to an aspect of the present invention, there is provided an image display apparatus using a light detection screen, the display panel including a plurality of pixel areas to display an image; A plurality of drivers for driving the display panel; A light detection screen having a plurality of light detection sensors arranged in a matrix form and formed on a front surface of the display panel; A remote controller having a light output unit configured to emit light to the light detection screen; A sensor driver which detects an amount of light emitted from the remote controller and applied to the plurality of light detection sensors to generate a light detection signal; A light detection controller for calculating position data to which light from the remote controller is applied according to the light detection signal and generating a plurality of coordinate information corresponding to the calculated position data; And a timing controller configured to control the light detection controller, the sensor driver, and the plurality of drivers to display image data from the outside and an image corresponding to the plurality of coordinate information on the display panel.

The light detection screen is configured to include first and second sensor voltage supply lines and a plurality of light detection sensors on the at least one transparent substrate so that an image displayed from the display panel on the rear surface is transmitted to the front surface. It is done.

Each light detecting sensor is configured to block light according to an image made of an opaque metal material or displayed on the rear surface by a black matrix, and detects the amount of light emitted from the light exiting part of the remote controller and incident to the front thereof. And outputting optical voltages corresponding to the detected amount of light, respectively.

The remote controller includes a plurality of control buttons including a light emitting button, a transmitter for supplying respective control information to the image display apparatus according to each control button, and a light emitting unit for emitting light according to the user's control of the light emitting button. When the light is emitted to the light emitter under the control of the light emitting button, an offset signal indicating that the light is emitted to the light emitter is transmitted to the timing controller through the transmitter.

The light detection controller enables the sensor driver when a sensing control signal is input from the timing controller. When the light detection signal is sequentially input from the sensor driver, the light detection controller sends the position data corresponding to each light detection signal to a memory. And the coordinate information of the photodetecting sensors corresponding to the read position data is sequentially supplied to the timing controller.

The timing controller supplies the sensing control signal to the optical detection controller when the offset signal is input, and uses the respective coordinate information to supply the sensing control signal to the optical detection controller. Detecting pixel areas of the display panel corresponding to positions, and performing linear interpolation to connect the detected pixel area, the peripheral pixel area thereof, and the pixel areas in a single line form, to generate display data; The display data may be aligned with the image data to be included in the image data and supplied to the at least one driver among the plurality of drivers.

In addition, a driving method of an image display apparatus using a light detection screen according to an embodiment of the present invention for achieving the above object is provided with a plurality of pixel areas and a plurality of display panels for displaying an image and driving the display panel A driving method of an image display device having a driver and a light detection screen having a light detection screen formed on the front side of the display panel, the method comprising: irradiating light to the light detection screen using a remote controller having a light exit portion; step; Generating a light detection signal by detecting an amount of light emitted from the remote controller and applied to the plurality of light detection sensors; Calculating position data to which light from the remote controller is applied according to the light detection signal and generating a plurality of coordinate information corresponding to the calculated position data; And displaying the image data from the outside and the image corresponding to the plurality of coordinate information on the display panel.

The generating of the light detection signal may include detecting an amount of light emitted from the light exiting part of the remote controller and incident to the front of the remote controller using the light detection sensors, and generating light voltages corresponding to the detected light amount, respectively. And generating the light detection signal according to the light voltages.

The generating of the plurality of coordinate information may include reading position data corresponding to each of the light detection signals from a memory and sequentially detecting the light detection signals corresponding to the read position data when the light detection signals are sequentially input. And outputting coordinate information of the sensors as the plurality of coordinate information.

The displaying of the image corresponding to the plurality of coordinate information on the display panel may include generating a sensing control signal when an offset signal is input through the remote controller, and supplying the plurality of coordinate information sequentially from the light detection controller. Detecting each pixel area of the display panel corresponding to the position of the light detection sensors using the respective coordinate information, the detected pixel area, the peripheral pixel area, and the pixel areas are in the form of a single line; Generating display data by performing linear interpolation so that the display data is connected to the plurality of drivers; do.

An image display apparatus using a light detection screen and a driving method thereof according to an embodiment of the present invention having various features as described above can use a variety of contents of a more various image display device using a light detection screen, The utilization of the image display device can be further increased.

Hereinafter, an image display device using a light detection screen and a driving method thereof will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an image display apparatus using a light detection screen according to an embodiment of the present invention.

1 includes a display panel 2 including a plurality of pixel areas to display an image; A plurality of drivers 4 and 6 for driving the display panel 2; A light detection screen 12 having a plurality of light detection sensors LS arranged in a matrix form and formed on a front surface of the display panel 2; A remote controller having a light output part configured to emit light to the light detection screen 12; A sensor driver (14) for detecting the amount of light applied from the remote controller to the plurality of light detection sensors (LS) to generate a light detection signal (SLS); A light detection controller 16 for calculating position data to which light from the remote controller is applied according to the light detection signal SLS and generating a plurality of coordinate information SPS corresponding to the calculated position data; And the image corresponding to the image data RGB and the plurality of coordinate information SPS from the outside by controlling the light detection controller 16, the sensor driver 14, and the plurality of drivers 4, 6. And a timing controller 8 for displaying on the display panel 2.

The image display device of the present invention configured as described above includes a liquid crystal display, a field emission display, a plasma display panel, and an organic light emitting diode display. Emitting Display) and the like can be used. In other words, the display device of any one of the above image display devices is further provided with a light detection controller 16, a sensor driver 14 and a light detection screen 12 according to the present invention, and then the image display device Can be applied to control the light detection controller 16 or the like through the timing controller 8. Hereinafter, an example in which the photodetecting screen 12 and the like of the present invention is applied to a liquid crystal display will be described in more detail.

The display panel 2 may be a liquid crystal panel. In this case, the liquid crystal panel is a thin film transistor TFT formed in each pixel area defined by a plurality of gate lines GL1 to GLn and data lines DL1 to DLm. A thin film transistor and a liquid crystal capacitor Clc connected to the TFT. The liquid crystal capacitor Clc is composed of a pixel electrode connected to a TFT, and a common electrode facing each other with the pixel electrode and the liquid crystal interposed therebetween. The TFT supplies the image signals from the respective data lines DL1 to DLm to the pixel electrodes in response to the scan pulses from the respective gate lines GL1 to GLn. The liquid crystal capacitor Clc charges the difference voltage between the image signal supplied to the pixel electrode and the common voltage supplied to the common electrode, and adjusts the light transmittance by varying the arrangement of liquid crystal molecules according to the difference voltage. The storage capacitor Cst is connected to the liquid crystal capacitor Clc in parallel so that the voltage charged in the liquid crystal capacitor Clc is maintained until the next data signal is supplied. The storage capacitor Cst is formed by overlapping the pixel electrode with the previous gate line and the insulating layer interposed therebetween. In contrast, the storage capacitor Cst is formed by overlapping the pixel electrode with the storage line and the insulating layer interposed therebetween.

Each driver 4, 6 driving the display panel 2 may include a data driver 4 and a gate driver 6.

The data driver 4 receives the image data Data and the data control signal DCS, which are arranged and input from the timing controller 8. In this case, the aligned image data Data is image data Data in which display data corresponding to coordinate information SPS from the light detection controller 16 is combined with image data RGB input from the outside. In this way, the data lines DL1 to DLm are driven by receiving the input image data Data and the data control signal DCS.

Specifically, the data driver 4 uses the source start pulse (SSP) and the source shift clock (SSC) among the supplied data control signals DCS to align the input image data ( Data) is converted into analog image data, that is, video signals, and one horizontal line of video signal is supplied to each data line DL1 through DLm for each horizontal period in which scan pulses are supplied to the gate lines GL1 through GLn. do. At this time, the data driver 4 supplies an image signal to each of the data lines DL1 to DLm in response to a source output enable (SOE) signal. In other words, the data driver 4 latches the input image data Data according to the SSC, and then supplies a gate-on signal (or scan pulse) to each gate line GL1 to GLn in response to the SOE signal. An image signal for one horizontal line is supplied to each data line DL1 to DLm every one horizontal period.

The gate driver 6 receives the gate control signal GCS from the timing controller 8 and generates a plurality of gate driving voltages for sequentially driving each gate line GL1 to GLn. Specifically, the gate driver 6 generates and outputs gate-on voltages (or scan pulses) for sequentially driving the gate lines GL1 to GLn using the gate control signal GCS. More specifically, the gate driver 6 sequentially generates a gate-on voltage using a gate start pulse (GSP) and a gate shift clock (GSC) of the gate control signal GCS. The output period of the gate-on voltage, that is, the pulse width of the gate-on voltage is adjusted according to the gate output enable (GOE) signal. The gate-on voltages thus output are sequentially supplied to the gate lines GL1 to GLn. In addition, the gate-off voltage is supplied to the gate lines GL1 to GLn during the period when the gate-on voltage is not supplied.

The driving voltage generator 10 shown in FIG. 1 uses a plurality of driving voltages for driving the liquid crystal display, for example, through the positive and negative driving voltages VDD and VSS and the sensor driver 14. First and second sensor driving voltages Vdt1 and Vdt2 for driving the light detection sensors LS of the light detection screen 12 are generated. Each of the generated driving voltages is supplied to respective components.

The light detection screen 12 includes a plurality of light detection sensors arranged in a matrix according to the first and second sensor voltage supply lines RL and VL to which the first and second sensor driving voltages Vdt1 and Vdt2 are supplied, respectively. LS is disposed on the front surface of the display panel 2. The light detection screen 12 is configured such that the first and second sensor voltage supply lines RL and VL and the plurality of light detection sensors LS are provided on at least one transparent substrate. The image displayed from) is transmitted to the front.

Each light detection sensor LS is configured to be made of an opaque metal material or the like, or to block light according to an image displayed on the back by a black matrix or the like, and exit from the light exit part of the remote controller to be incident to the front. The amount of light is detected and light voltages corresponding to the detected amount of light are respectively output. Here, each of the photodetection sensors LS may be provided in a number equal to or smaller than the total number of pixel areas of the display panel 2, and when provided in a smaller number, at least 2 × 2 pixel areas. One photodetection sensor LS may be arranged per array.

Each light detection sensor LS of the light detection screen 12 is connected to the first and second sensor driving voltages Vdt1 and Vdt2 input through the first and second sensor voltage supply lines RL and VL. Therefore, an optical voltage corresponding to the amount of light incident to the front side is generated.

Each photodetecting sensor LS is input as a switching signal and a capacitor PC for generating an optical voltage corresponding to the amount of light incident from the front direction according to the second sensor driving voltage Vdt2 input as a reference voltage. The detection switching element DT which outputs the optical voltage from the capacitor PC according to one sensor drive voltage Vdt1 is provided. Here, the front direction is preferably exposed to the outside for detecting the amount of light in the front direction of the capacitor PC and the detection switching element DT, but the rear surface thereof is preferably blocked so as not to be affected by the displayed image. In other words, the capacitor PC and the detection switching element DT may be made of an opaque metal material or may be configured to block an image from the backside by a black matrix or the like.

As shown in FIG. 2, the remote controller of the present invention includes a plurality of control buttons 51 and 52 including a light emitting button LB, a transmitter 50, and a light emitter 60. It is configured to control or apply light.

Specifically, the remote controller of FIG. 2 includes a plurality of control buttons including a power control button 51, a numeric input button 52, and a light emitting button LB, and each of the image display apparatuses according to the respective control buttons. A transmitter 50 for supplying control information, and a light emitter 60 for outputting light according to the user's control of the light emitting button LB, wherein the remote controller of the present invention is provided according to the control of the light emitting button LB. When the light is emitted to the light emitter 60, an offset signal Oset indicating that the light is emitted to the light emitter 60 is transmitted through the transmitter 50.

Therefore, when the user normally controls a plurality of control buttons, the user can control the video display device by transmitting the respective control information through the transmitter 50, and if the user uses the light emitting button LB, 60, the offset signal Oset is supplied to the timing controller 8 of the video display device through the transmitter 50.

The sensor driver 14 is connected to the first and second sensor voltage supply lines RL and VL provided in the light detection screen 12 according to control from the light detection controller 16. Vdt1, Vdt2) is supplied. Each photodetection signal SLS is generated to correspond to each photovoltage supplied from each photodetection sensor LS. To this end, although not shown in the drawings, the sensor driver 14 includes a plurality of operational amplifiers and the like, to which the respective optical voltages and the ground voltages are input, and thus the optical detection signal SLS amplifying the difference between the optical voltage and the ground voltage. Will generate and print). At this time, the sensor driver 14 sequentially processes only the light detection signal SLS input at a voltage level above or below a predetermined reference value, that is, the light detection signal SLS whose voltage level is changed by light applied to the remote controller. The light detection controller 16 can be supplied.

When the sensing control signal SCS is input from the timing controller 8, the light detection controller 16 applies the enable signal ES to the sensor driver 14, so that the sensor driver 14 receives the light detection signal ( Control to output SLS). The light detection controller 16 calculates the position data to which the light from the remote controller is applied using the light detection signal SLS from the sensor driver 14, and then the plurality of coordinates corresponding to the calculated position data. Information (SPS). The optical detection controller 16 will be described in more detail later with reference to the accompanying drawings.

On the other hand, the timing controller 8 aligns the image data RGB input from the outside to be suitable for driving the display panel 2, and supplies the aligned image data Data to the data driver 4. At this time, the timing controller 8 uses the at least one of the synchronization signal supplied from the outside, that is, the dot clock DCLK, the data enable signal DE, and the horizontal and vertical synchronization signals Hsync and Vsync. (6,4) will be controlled. Specifically, the timing controller 8 generates a gate control signal GCS and a data control signal DCS by using at least one of the synchronization signals, and transmits the gate control signal GCS to the gate and data drivers 6 and 4. Supply each.

On the other hand, the timing controller 8 generates the sensing control signal SCS to the light detection controller 16 when the offset signal Oset indicating that light is applied to the display panel 2 is input through the remote controller. Supply. That is, when the offset signal Oset is input, the light detection controller 16 controls to generate position data to which light is applied from the remote controller and a plurality of coordinate information SPS corresponding to the position data. As such, when the plurality of coordinate information SPS are input, the timing controller 8 generates display data such that a predetermined image is displayed at a position corresponding to the coordinate information SPS. For example, when the display data is generated such that a line of a predetermined color is formed according to the plurality of coordinate information SPS, the display data is included in the image data RGB from the outside to be displayed on the display panel 2. do.

3 is a view for explaining the light detection screen and the light detection sensor and a driving method thereof shown in FIG. 4 is a view for explaining a plurality of coordinate information detection methods.

First, referring to FIG. 3, the light detection screen 12 may be provided with a plurality of light detection sensors LS to correspond to 4 × 12 pixel areas of the display panel 2, respectively.

When the user presses the light emitting button LB on the remote controller to emit light to the light output unit 60 on the display panel 2 provided with the light detection screen 12, the timing controller 8 provides an offset signal Oset. Is applied. Accordingly, the sensing control signal SCS is supplied to the light detection controller 16, and the enable signal ES is applied to the sensor driver 14, so that the sensor driver 14 sequentially applies the light detection signal SLS. Will be detected.

When the user irradiates light to the light detecting screen 12 in the shape of a curve PLI as shown in FIG. 3, the light detecting sensors irradiated with light, that is, the first to sixth light detecting sensors LS1 to LS6 are applied. The light voltage is sequentially output to correspond to the received light. Accordingly, the sensor driver 14 sequentially supplies light voltages having different voltage levels from those of other light detection sensors that are not irradiated with light, that is, light voltages of the first to sixth light detection sensors LS1 to LS6 irradiated with light. If so, it amplifies and generates a corresponding light detection signal SLS.

As shown in Table 1, the light detection signal SLS may be a unique number of the light detection sensors LS1 to LS6 irradiated with light or arrangement information or position information of the light detection sensors LS1 to LS6. Can be. In this way, each of the generated light detection signals SLS is sequentially supplied to the light detection controller 16.

When the light detection signal SLS is sequentially input, the light detection controller 16 reads the position data PS corresponding to each light detection signal SLS, as shown in Table 1 and FIG. 4. Such position data PS or coordinate information SPS may be separately stored in a separate memory. In this way, the light detection controller 16 calculates the position data PS first, and then sequentially supplies the coordinate information SPS of the light detection sensors LS corresponding to each position data PS to the timing controller 8. do.

The timing controller 8 detects each pixel area of the display panel 2 corresponding to the position of the light detection sensors LS according to the coordinate information SPS sequentially supplied from the light detection controller 16. The display data is generated by performing linear interpolation so that the detected pixel region, the peripheral pixel region thereof, and the pixel regions are connected in a line shape. When a line image corresponding to the plurality of coordinate information SPS is generated as display data, the display data is aligned with the external image data RGB to be included in the image data RGB input from the outside. The aligned image data Data is arranged in units of at least one horizontal line and sequentially supplied to the data driver 4.

Accordingly, the display panel 2 may display an image corresponding to an area to which light is applied through the remote controller as well as an image according to the image data RGB from the outside.

As in the present invention, when the user irradiates light to the display panel 2 in a predetermined shape with a remote controller or the like, when the user recognizes the light and calculates the position data, the user can use a variety of contents by using the video display device of the large screen. In addition, it is possible to further increase the utilization of the large-screen image display device.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and it is common in the art that various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a block diagram showing an image display device using a light detection screen according to an embodiment of the present invention.

2 is a block diagram showing a remote controller according to an embodiment of the present invention.

3 is a view for explaining a light detection screen and a light detection sensor and a driving method thereof shown in FIG.

4 is a view for explaining a plurality of coordinate information detection methods.

* Brief description of symbols for the main parts of the drawings.

2: Display panel (liquid crystal panel) 4: Data driver

6: gate driver 8: timing controller

10: drive voltage generation unit 12: light detection screen

14: sensor driver 16: light detection controller

Claims (10)

A display panel including a plurality of pixel areas to display an image; A plurality of drivers for driving the display panel; A light detection screen having a plurality of light detection sensors arranged in a matrix form and formed on a front surface of the display panel; A remote controller having a light output unit configured to emit light to the light detection screen; A sensor driver which detects an amount of light emitted from the remote controller and applied to the plurality of light detection sensors to generate a light detection signal; A light detection controller for calculating position data to which light from the remote controller is applied according to the light detection signal and generating a plurality of coordinate information corresponding to the calculated position data; And And a timing controller configured to control the light detection controller, the sensor driver, and the plurality of drivers so that image data from the outside and an image corresponding to the plurality of coordinate information are displayed on the display panel. Device. The method of claim 1, The light detection screen An image display apparatus configured to include first and second sensor voltage supply lines and a plurality of photodetection sensors on the at least one transparent substrate so that an image displayed from the display panel on the rear surface is transmitted to the front surface . The method of claim 2, Each light detection sensor It is configured to block the light according to the image made of an opaque metal material or displayed on the back by a black matrix, and detects the amount of light emitted from the light exit portion of the remote controller and incident to the front, and corresponding to the detected light amount And an optical display device for outputting optical voltages, respectively. The method of claim 3, wherein The remote controller A plurality of control buttons including a light emitting button, A transmitter for supplying respective control information to the video display device according to each control button; And a light emitting unit configured to emit light according to the light emitting button control of the user. And an offset signal for notifying that the light exits to the light exit unit when the light exits to the light exit unit under the control of the light emitting button is transmitted to the timing controller through the transmitter. The method of claim 4, wherein The light detection controller When the sensing control signal is input from the timing controller to enable the sensor driver, When the light detection signal is sequentially input from the sensor driver, position data corresponding to each light detection signal is read into a memory, And supplying coordinate information of the photodetecting sensors corresponding to the read position data to the timing controller sequentially. The method of claim 5, The timing controller is When the offset signal is input, the sensing control signal is supplied to the light detection controller, When the plurality of coordinate information are sequentially supplied from the light detection controller, each pixel area of the display panel corresponding to the position of the light detection sensors is detected using the respective coordinate information, The display data is generated by performing linear interpolation so that the detected pixel region, its surrounding pixel region, and each of the pixel regions are connected in a single line shape. And the display data is aligned with the image data so that the display data is included in the image data and supplied to the at least one driver of the plurality of drivers. A driving method of an image display apparatus having a display panel including a plurality of pixel areas to display an image, a plurality of drivers for driving the display panel, and a plurality of light detection sensors and a light detection screen formed on the front of the display panel. To Irradiating light onto the light detection screen using a remote controller having a light output unit; Generating a light detection signal by detecting an amount of light emitted from the remote controller and applied to the plurality of light detection sensors; Calculating position data to which light from the remote controller is applied according to the light detection signal and generating a plurality of coordinate information corresponding to the calculated position data; And And displaying the image data from the outside and an image corresponding to the plurality of coordinate information on the display panel. The method of claim 7, wherein Generating the light detection signal Detecting the amount of light emitted from the light exit part of the remote controller and incident to the front using the light detection sensors; Generating optical voltages corresponding to the detected amount of light, respectively, and And generating the light detection signal according to the light voltages. The method of claim 8, Generating the plurality of coordinate information Reading position data corresponding to each of the light detection signals from a memory when the light detection signals are sequentially input, and And outputting coordinate information of the photodetecting sensors corresponding to the read position data as the plurality of coordinate information, respectively. The method of claim 9, The step of displaying the image corresponding to the plurality of coordinate information on the display panel Generating a sensing control signal when an offset signal is input through the remote controller; Detecting each pixel area of the display panel corresponding to the position of the light detection sensors using the coordinate information when the plurality of coordinate information are sequentially supplied from the light detection controller; Generating display data by performing a linear interpolation method such that the detected pixel region, the surrounding pixel region and the pixel regions are connected in a line shape, and the like, and And arranging the display data together with the image data so that the display data is included in the image data, and supplying the display data to at least one driver of the plurality of drivers.

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