KR20080078477A - User interface apparatus and method of a builit in image sensor for liquid crystal display device - Google Patents

User interface apparatus and method of a builit in image sensor for liquid crystal display device Download PDF

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Publication number
KR20080078477A
KR20080078477A KR1020070018693A KR20070018693A KR20080078477A KR 20080078477 A KR20080078477 A KR 20080078477A KR 1020070018693 A KR1020070018693 A KR 1020070018693A KR 20070018693 A KR20070018693 A KR 20070018693A KR 20080078477 A KR20080078477 A KR 20080078477A
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KR
South Korea
Prior art keywords
liquid crystal
user interface
crystal panel
luminance level
image sensor
Prior art date
Application number
KR1020070018693A
Other languages
Korean (ko)
Inventor
안충환
Original Assignee
엘지디스플레이 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 엘지디스플레이 주식회사 filed Critical 엘지디스플레이 주식회사
Priority to KR1020070018693A priority Critical patent/KR20080078477A/en
Publication of KR20080078477A publication Critical patent/KR20080078477A/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix

Abstract

A user interface device in an image sensor-embedded LCD(Liquid Crystal Device) and a method thereof are provided to increase the convenience of usage by installing an image sensor at each of the pixels of a liquid crystal panel so as to use an LCD such as a touch pad or to execute pointing and remote input through a laser pointer. A user interface device in an image sensor-embedded LCD comprises an image sensor-embedded liquid crystal panel(31), an input data synchronization part(32), a luminance level detection part(33), and a system(35). The liquid crystal panel comprises image sensors which respectively are installed at pixels, and outputs scanning information for a document or an image or location information. The input data synchronization part executes a synchronization function in order to detect user interface information from scanning information which is inputted through each image sensor. The luminance level detection part detects an outstandingly high or low value among the luminance level values of the scanning input data inputted through the input data synchronization part. Based on a detected luminance level value, the system recognizes user interface information and executes an associated control function.

Description

USER INTERFACE APPARATUS AND METHOD OF A BUILIT IN IMAGE SENSOR FOR LIQUID CRYSTAL DISPLAY DEVICE}

1 is a block diagram of a liquid crystal display device according to the prior art.

2 is a circuit diagram of a liquid crystal panel with a built-in image sensor according to the prior art.

Figure 3 is a block diagram of a user interface device of the liquid crystal display device embedded image sensor according to the present invention.

Figure 4 is an exemplary view showing an example of detection of laser light in the image sensor built-in liquid crystal panel.

5 is a control flowchart of a user interface method of an image sensor-embedded liquid crystal display device according to the present invention;

*** Description of the symbols for the main parts of the drawings ***

31: LCD panel with image sensor 32: input data synchronization unit

33: luminance level detector 34: input data controller

35: system

The present invention relates to a technology for inputting user interface information through a liquid crystal panel incorporating an image sensor, and in particular, displays images by driving the liquid crystal panel and touches using image sensors provided in each pixel on the liquid crystal panel. The present invention relates to a user interface device and a method of an image sensor-embedded liquid crystal display device capable of pad or remote input.

In general, a liquid crystal display device is a display device in which image information is individually supplied to pixels arranged in a matrix, and a desired image is displayed by adjusting light transmittance of the pixels. To this end, a liquid crystal display includes a liquid crystal panel in which pixels, which are the smallest unit for implementing an image, are arranged in an active matrix form, and a driving unit for driving the liquid crystal panel. Since the LCD does not emit light by itself, a backlight unit is provided to supply light to the LCD.

1 is a block diagram of a liquid crystal display according to the prior art, as shown in FIG. A liquid crystal panel (11) having a thin film transistor (TFT) as a switching element and driven by a data signal and a gate-on signal to display an image; A gate driver 12 for supplying a gate-on signal to each of the gate lines GL1 to GLn of the liquid crystal panel 11; A data driver 13 for supplying the data signal to each of the data lines DL1 to DLm of the liquid crystal panel 11; A controller 14 for outputting a control signal for controlling the driving of the gate driver 12 and the data driver 13; It is configured to include a backlight unit 15 is installed on the back of the liquid crystal panel 11 to supply a backlight, the operation thereof will be described as follows.

The liquid crystal panel 11 includes a plurality of liquid crystal cells Clc arranged in a matrix at the intersections of the data lines DL1 to DLm and the gate lines GL1 to GLn, and a thin film transistor TFT as a switching element. The pixel is driven by controlling the driving of the thin film transistor TFT with a gate-on signal and supplying a data signal to the liquid crystal cell Clc through the thin film transistor TFT to display an image. .

The gate driver 12 sequentially supplies a gate-on signal (scan pulse) to the gate lines GL1 to GLn in response to the gate control signal from the controller 14, thereby supplying data. The horizontal lines of are selected.

The data driver 13 converts the digital video data RGB into a data voltage corresponding to the gray scale value (analog gamma compensation voltage) in response to a data control signal from the controller 14, and the converted data voltage is converted into the liquid crystal. The data lines DL1 to DLm on the panel 11 are supplied.

The controller 14 generates a gate control signal for controlling the gate driver 12 and a data control signal for controlling the data driver 13 using a vertical / horizontal synchronization signal and a clock signal supplied from a system. . In addition, the controller 14 samples the digital video data RGB input from the system, rearranges the digital video data RGB, and supplies the same to the data driver 13.

The backlight unit 15 is installed on the rear surface of the liquid crystal panel 11 to supply the backlight to the liquid crystal panel 11.

Recently, an image input method for installing an image sensor corresponding to liquid crystal cells Clc on the liquid crystal panel 11 and inputting a document, an image, or position information using the image sensor has been proposed.

Hereinafter, an image sensor embedded LCD will be described with reference to the accompanying drawings. In fact, many image sensors are provided corresponding to the number of pixels on the liquid crystal panel, but all have the same structure, and thus only one unit pixel will be described for convenience of description.

2 illustrates a structure of a liquid crystal panel with a built-in image sensor according to the prior art. As shown in FIG. 2, one pixel area P on the liquid crystal panel 11 is used to display an image display operation when the liquid crystal panel 11 is driven. It consists of two sub-pixels: the pixel DP and the sensor pixel SP for scanning an image.

The display pixel DP is a pixel for displaying an image and is driven by a data signal input through a transistor T1 which is a switching element turned on by a gate-on signal input through the gate line GL1. The relevant information is indicated by).

In addition, the sensor pixel SP is a pixel for scanning a scan object placed on the upper portion of the liquid crystal panel 11. The sensing signal is output to the data line DL1b through another switching element T2 that is turned on by the gate-on signal input through the gate line GL1b.

The image signals for each pixel output as described above become scanning image signals acquired from one scan object. The sensed image signal may be output corresponding to each pixel, but as another example, the resolution may be reduced by driving one sensor pixel SP per several display pixels DP.

However, in the liquid crystal display device with such an image sensor, only the function of inputting image information using the sensor pixels is not able to perform a user interface function. Therefore, the user has to use a laser pointer to indicate an arbitrary part and input a control command using a mouse, which is inconvenient in use.

Accordingly, the present invention drives the liquid crystal panel to display an image, and uses an image sensor included in each pixel on the liquid crystal panel to use the same as a touch pad or to direct and remotely input a laser pointer.

According to an aspect of the present invention, there is provided a liquid crystal panel including an image sensor having an image sensor on each liquid crystal pixel for displaying an image and outputting scanning information or position information of a document or image; An input data synchronizer configured to perform a synchronization function to detect user interface information from scanning information input through each of the image sensors; A luminance level detector for detecting an extremely high or low value among the luminance level values of the scanning input data input through the input data synchronization unit; And a system for recognizing user interface information and performing a corresponding control function based on the detected luminance level value.

Another object of the present invention is to scan a scanning object placed on an image sensor-embedded liquid crystal panel through sensor pixels provided in each liquid crystal pixel and input an image signal according thereto; Detecting an extremely high or low value among luminance level values of the input image signal; And performing the corresponding function by recognizing the interface information of the user based on the result of performing the comparison operation a plurality of times in succession.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 3 is a block diagram showing an embodiment of a user interface device of a liquid crystal display according to the present invention. As shown therein, each of the liquid crystal pixels for displaying an image includes an image sensor and scan information of a document or an image. Or an image sensor embedded liquid crystal panel 31 for outputting position information; An input data synchronizer 32 performing a synchronization function to detect user interface information from the scanning information input through each of the image sensors; A brightness level detector 33 for detecting a relatively high or low value among the brightness level values of the scanning input data input through the input data synchronizer 32; On the basis of the detection result of the brightness level detector 33, it comprises a system 35 for recognizing user interface information and performing the corresponding control function, Figure 2 and attached to the operation of the present invention configured as described above A detailed description with reference to FIG. 4 is as follows.

The liquid crystal panel 31 having an image sensor includes an image sensor in each pixel for displaying an image, and outputs scanning information or position information of a document or an image by using the image sensor.

That is, the image sensor-embedded liquid crystal panel 31 includes a display pixel DP for an image display operation and a sensor pixel for an image scan operation in one pixel area P on the liquid crystal panel 10 as shown in FIG. 2. (SP). Of course, the other pixel areas P on the liquid crystal panel 31 also include the display pixel DP and the sensor pixel SP.

The display pixel DP is a pixel for displaying an image and is driven by a data signal input through a transistor T1 which is a switching element turned on by a gate-on signal input through the gate line GL1. Clc).

The sensor pixel SP is a pixel for scanning a scan object placed on an upper portion of the liquid crystal panel 10. The sensor pixel SP receives light reflected from the scan object after being irradiated from the backlight and serves as an image sensor PT1. The sensing signal is output to the data line DL1b through another switching element T2 that is turned on by the gate-on signal input through the gate line GL1b.

The image signals for each pixel output as described above become scanning image signals acquired from one scan object. The sensed image signal may be output corresponding to each pixel, but as another example, the resolution of the scanning image may be lowered and output by driving one sensor pixel SP per several display pixels DP.

Accordingly, the liquid crystal panel 31 having an image sensor may display an input image signal and receive a document, an image, or position information.

On the other hand, when the laser pointer shines on a certain position on the image sensor embedded liquid crystal panel 31 or touches it with a finger, the luminance level of the image signal input through the corresponding sensor pixel SP is changed. Implement the user interface.

For example, when the user illuminates the red laser pointer on the image sensor embedded liquid crystal panel 31, the red laser light is emitted to several sub pixels as shown in FIG. As a result, the luminance level of the light input through the corresponding sensor pixel SP is different from the luminance level of the light input through the other sensor pixel SP. In particular, among the three R, G, and B subpixels in which the red laser light is emitted, the luminance level of the light input through the sensor pixels SP installed in the three red subpixels is input through the different sensor pixels SP. It becomes higher than the brightness level of the light to become.

As another example, when a user touches a certain area on the image sensor built-in liquid crystal panel 31 with a finger, the luminance level of the light input through the corresponding sensor pixels SP is different from that of the light input through the other sensor pixels SP. It becomes lower than the luminance level.

When the user illuminates the laser pointer at an arbitrary position on the image sensor built-in liquid crystal panel 31 or touches it with a finger, the user interface is based on the change of the luminance level of the light input through the sensor pixels SP as described above. Each embodiment to be implemented will be described in more detail as follows.

A video signal output from a system 35 corresponding to a TV main body or a PC main body, for example, in a state in which a video signal of a document file is displayed on the image sensor built-in liquid crystal panel 31, A case of selecting any item of the image with a laser pointer will be described as an example. The laser pointer is a multi-color laser pointer, for example, in which red laser light is emitted. In such a case, as shown in the above description, the red laser light is emitted to several sub-pixels (S1).

At this time, the light of the laser pointer can be detected using all the sensor pixels SP installed corresponding to each display pixel DP on the liquid crystal panel 31 having the image sensor embedded therein. One sensor pixel SP is driven per DP to detect light of the scanning image.

In this case, the input data synchronization unit 32 performs data synchronization to receive the scanning input data input from the driving sensor pixel SP on the image sensor embedded liquid crystal panel 31.

At this time, the luminance level detector 33 detects the luminance level values of the scanning input data sequentially input through the input data synchronization unit 32 and compares the detected values with a preset maximum luminance level value. S3, S4)

As a result of the comparison in the luminance level detecting unit 33, only the luminance level value of the scanning input data input through the sensor pixel SP included in one of the three sub pixels to which the light of the red laser pointer is shined. It becomes higher than the said maximum brightness level value (S5).

Therefore, the luminance level detection unit 33 outputs the maximum luminance level value detection signal when outputting the comparison result to the system 35, so that the system 35 is on the liquid crystal panel 31 with the image sensor. It is possible to recognize which item of red laser light is shining on the document file displayed in.

In this state, the user can operate the multicolor laser pointer to select the indicated item. As an example of this, the user may change the color of the laser light to another one (for example, green) while the user is pointing an arbitrary item to the red laser light as described above (S6).

In this case, only the luminance level value of the scanning input data input through the sensor pixel SP included in one of the three sub-pixels in which the green laser light is reflected as a result of the comparison in the luminance level detector 33 is obtained. It becomes higher than this maximum brightness level value.

Accordingly, the system 35 determines that an item on which the ledge light is shining is selected by a user on a document file displayed on the liquid crystal panel 31 having an image sensor, and performs a control function according to the content of the item. (S7, S8)

In the above description, an arbitrary item is selected using the multicolor laser pointer, but as an example, the user interface function is performed by double-clicking the single color laser pointer.

The user instructs the laser pointer as to any item on the document file displayed on the built-in liquid crystal panel 31 as described above, and this state is the same as in the above description. 32. The brightness level detector 33 detects the detected signal and transmits the detected signal to the system 35 (S1-S4).

Accordingly, the system 35 can recognize that an arbitrary item is indicated on the document file displayed on the image sensor embedded liquid crystal panel 31 (S5).

In such a state, when the user releases the on / off button signal provided in the laser pointer to block the laser light output and clicks again in a predetermined time (for example, several msec), the system 35 ) Recognizes the fact through the path and selects the corresponding item (S9, S7).

Accordingly, the system 35 performs a control function corresponding to the content of the item selected by the double click. (S8)

As another embodiment of the present invention, the user interface function is performed by using the image sensor embedded liquid crystal panel 31 as a touch panel.

In the state in which the image signal of the document file is displayed on the image sensor built-in liquid crystal panel 31 in the system 35 as described above, the user touches any item on the document file with a finger or a stick. It demonstrates as an example. In this case, as described above, the driving of one sensor pixel SP per three display pixels DP detects light of the scanning image.

In this case, the input data synchronization unit 32 performs data synchronization to receive the scanning input data input from the driving sensor pixel SP on the image sensor embedded liquid crystal panel 31.

In this case, the luminance level detector 33 compares the luminance level values of the scanning input data sequentially input through the input data synchronization unit 32 with a preset minimum luminance level value (S4).

As a result of the comparison in the luminance level detector 33, only the luminance level value of the scanning input data input through the sensor pixel SP included in one of the touched subpixels is lower than the preset minimum luminance level value. do. This comparison detection operation is performed twice in succession (S10, S11).

Therefore, when the luminance level detection unit 33 outputs the comparison result to the system 35, the minimum luminance level value detection signal is continuously output twice. Therefore, the system 35 includes the image sensor. It recognizes which item is selected on the document file displayed on the liquid crystal panel 31, and performs a control function according to the content of the item (S7, S8).

As described in detail above, in the present invention, a system for driving an LCD panel to display an image may be used as a touch pad or an indication and remote input using a laser pointer using image sensors included in each pixel on the LCD panel. By doing so, there is an effect of improving convenience in use.

Claims (10)

An image sensor embedded liquid crystal panel having an image sensor on each liquid crystal pixel for displaying an image and outputting scanning information or position information of a document or an image; An input data synchronizer configured to perform a synchronization function to detect user interface information from scanning information input through each of the image sensors; A luminance level detector for detecting an extremely high or low value among the luminance level values of the scanning input data input through the input data synchronization unit; And a system for recognizing user interface information and performing a corresponding control function based on the detected luminance level value. The user interface device of claim 1, wherein the liquid crystal panel having an image sensor is configured to drive a predetermined ratio of sensor pixels among a plurality of sensor pixels to output the canning information or the position information. . The user interface device of claim 1, wherein the user interface information is generated by irradiating a laser pointer onto the liquid crystal panel. 4. The user interface device of claim 3, wherein the laser pointer is a multicolor laser pointer capable of alternately outputting laser light of different colors. The user interface device of claim 1, wherein the user interface information is generated by a touch of a liquid crystal panel of a finger or a stick. The liquid crystal display of claim 1, wherein the luminance level detection unit is configured to detect an extremely high or low value by comparing a luminance level value of the input scanning input data with a preset maximum or minimum luminance level value. The device's user interface device. The user interface device of claim 1, wherein the system comprises a TV main body or a PC main body. A first step of scanning a scanning object placed on an image sensor-embedded liquid crystal panel through sensor pixels provided in each liquid crystal pixel and inputting an image signal according thereto; A second procedure for detecting a value which is extremely high or low among luminance level values of the input image signal; And a third process of continuously performing the comparison operation a plurality of times and recognizing the interface information of the user based on the result and performing a corresponding function. 9. The user interface method of claim 8, wherein the value of the second step is a value detected by a laser pointer irradiated at an arbitrary position on the liquid crystal panel. The method of claim 8, wherein the extremely low value of the second process is a value detected by touching a finger or a stick at an arbitrary position on the liquid crystal panel.
KR1020070018693A 2007-02-23 2007-02-23 User interface apparatus and method of a builit in image sensor for liquid crystal display device KR20080078477A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100939831B1 (en) * 2008-09-19 2010-02-02 가부시키가이샤 덴소 Operating input device for reducing input error and information device operation apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100939831B1 (en) * 2008-09-19 2010-02-02 가부시키가이샤 덴소 Operating input device for reducing input error and information device operation apparatus

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