KR20200030845A - Multi-modulus type image display device and driving method the same - Google Patents

Abstract

Disclosed are a multi-modulus image display device and a driving method thereof. According to the present invention, the multi-modulus image display device comprises: a plurality of image display panels storing luminance characteristic data and color temperature characteristic data according to luminance and color temperature realization characteristic inspection results previously performed, and arranged and assembled according to an optimal arrangement map set by the stored luminance or color temperature characteristics; and an integrated controller compensating luminance deviation or color temperature deviation between each image display panel by using each luminance data or color temperature characteristic data for the image display panels and profile data. The multi-modulus image display device may easily correct the luminance and color temperature deviation between the image display panels by the integrated controller.

Description

Multi-modular type video display device and its driving method {MULTI-MODULUS TYPE IMAGE DISPLAY DEVICE AND DRIVING METHOD THE SAME}

The present invention relates to a multi-modal type image display device in which a plurality of modular image display panels are assembled to display an image on a large screen, and a driving method thereof.

In an information-oriented society, a flat type image display device is a medium that simultaneously transmits visual and audio information, and its importance is emphasized more than ever. Accordingly, the application range for flat panel display devices such as a liquid crystal display device, an organic light emitting display, and a micro LED image display device is very high. It is getting wider.

Recently, a plurality of organic light emitting diode display panels or micro LED image display panels are arranged and assembled in the form of M × N, and the assembled display panels are also used as a multi-modal image display device for realizing a large screen image. Here, M and N are the same or different natural numbers from each other.

As described above, after assembling and assembling a plurality of organic light emitting diode display panels or micro LED display panels, the luminance deviation between the plurality of modular display panels must not be prevented in order to realize a large screen image with the assembled display panels. .

Accordingly, in the related art, after a plurality of modular display panels are assembled and installed in advance, luminance characteristics and degree of deviation display are measured according to the positions of the display panels. In addition, image data are corrected to minimize luminance deviation between display panels according to the luminance measurement result of each display panel, and the corrected image data is displayed as an image on each display panel.

However, conventionally, since a plurality of modular display panels are pre-assembled and the luminance deviation is corrected for each display module, there is a problem in that it is not easy to cope with changes in the use environment or replacement situation of the modular display panels.

In other words, when the installation position or direction of the multi-modal video display device is changed, or when at least one display panel configured in the multi-modal video display device is replaced, the brightness characteristics and the brightness deviation of the display panels must be measured again. Correction was possible.

Therefore, the conventional multi-modular video display device has to face various problems such as a large time-consuming to respond to changes in the use environment, failures and replacement situations, and a large amount of coping manpower and cost.

An object of the present invention is to provide a multi-modal type image display device and a driving method thereof to facilitate correction of luminance and color temperature deviation between a plurality of modular image display panels.

In particular, characteristic information on luminance, color temperature, and luminous efficiency for each modular image display panel is stored and shared by an integrated controller. Accordingly, it is to provide a multi-modal type image display device and a driving method so that characteristic information of each image display panel can be used in real time for arrangement and deviation correction of each image display panel.

In addition, an object of the present invention is to support the optimal layout map of the image display panels so that the image display efficiency can be optimized, and the luminance and color temperature deviation of the image display panels can be corrected by using a reference profile reflecting characteristic information of each image display panel. It is to provide a multi-modular type image display device and a driving method thereof.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. In addition, it will be readily appreciated that the objects and advantages of the present invention can be realized by means of the appended claims and combinations thereof.

In order to achieve the above object, the multi-modal type image display device according to an embodiment of the present invention stores luminance characteristic data and color temperature characteristic data according to a result of a characteristic inspection result of previously performed luminance and color temperature, and each stored luminance Alternatively, a plurality of image display panels arranged and assembled according to an optimal layout map set by color temperature characteristics, and luminance between each image display panel using respective luminance or color temperature characteristic data and profile data for the plurality of image display panels Or an integrated controller to compensate for color temperature variations.

In addition, the driving method of the multi-modular type image display device according to an embodiment of the present invention for achieving the above object is a plurality of luminance characteristic data, and color temperature characteristic data stored in accordance with the luminance and color temperature realization characteristic inspection results previously performed Arranging and assembling the image display panel of the image according to an optimal layout map set by luminance or color temperature characteristics, and using luminance or color temperature characteristic data stored in each of the plurality of image display panels and profile data according to luminance or color temperature characteristics And compensating for luminance or color temperature deviation between the image display panels.

The multi-modular type image display device and its driving method according to an embodiment of the present invention can store characteristic information on luminance, color temperature, and light emission efficiency for each modular image display panel and share it in an integrated controller. By this, it is possible to easily correct luminance and color temperature deviation between image display panels.

In addition, by allowing the characteristic information of each image display panel to be used and reflected in real time to the arrangement and characteristic deviation correction of each image display panel, even if specific image display panels are repaired or replaced, the characteristics of the image display panel repaired or replaced immediately By reflecting it can be made to compensate for the deviation as a whole. Accordingly, it is possible to minimize response time required for repair and replacement of a specific video display panel, and reduce manpower and cost.

In addition, the multi-modular type image display apparatus and its driving method according to an embodiment of the present invention may support an optimal arrangement map of image display panels in real time so that image display efficiency can be optimized. In addition, the luminance and color temperature deviation of the image display panels can be corrected by using a profile reflecting the characteristic information of the image display panels, thereby making it possible to more easily respond to changes in the use environment of the multi-modal image display device.

In addition to the above-described effects, the concrete effects of the present invention will be described together while describing the specific matters for carrying out the invention.

1 is a block diagram showing the components before assembly of the image display panel of the image display device according to the first embodiment of the present invention.
2 is a configuration diagram showing an image display device in which a modularized image display panel is assembled according to an optimal layout map.
3 is a configuration diagram showing the configuration of a modular video display panel according to the present invention.
4 is a view for explaining a method of measuring and storing luminance, color temperature, and luminous efficiency characteristics for each modular image display panel before being assembled into a modular type.
5 is a diagram showing luminance characteristics in a randomly arranged state before assembly of a modular image display panel.
6 is a graph for explaining a method for generating a reference profile and a change in luminance characteristics according to an optimal arrangement map of the present invention.
7 is a flowchart illustrating a method for generating an optimal layout map of a modular image display panel.
8 is a block diagram showing the configuration of the integrated controller shown in FIGS. 1 and 2 in detail.
9 is a graph for explaining a method for extracting a luminance compensation value for each modular image display panel and a method for correcting luminance characteristics.
10 is a graph for explaining a method for extracting luminance compensation values and a method for correcting luminance characteristics according to repair and replacement of at least one image display panel.
11 is a diagram showing the arrangement of the image display panel and the luminance characteristics of the image display panel according to another method for generating an optimal layout map in the present invention.
12 is a configuration block diagram specifically showing the configuration of the integrated controller according to the second embodiment of the present invention.
13 is a view for explaining a method of correcting color temperature characteristics for each modular image display panel.
14 is a block diagram illustrating a multi-modular type video display device according to a third embodiment of the present invention.
15 is a block diagram showing the configuration of the integrated controller shown in FIG. 14 in detail.
16 is a graph for explaining a reference profile and an optimal profile generating method according to an optimal placement map.
17 is a graph for explaining a method for generating an optimal profile according to an optimal placement map.
18 is a diagram illustrating a display screen for rearranging the image display panel of the display unit illustrated in FIG. 15.
19 is a graph for explaining a method for extracting a luminance compensation value for each modular image display panel and a method for correcting luminance characteristics.

The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, and accordingly, a person skilled in the art to which the present invention pertains can easily implement the technical spirit of the present invention. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

Hereinafter, an image data compensation module and an image display device using the same will be described according to an embodiment of the present invention.

1 is a block diagram showing the components before assembly of the image display panel of the image display device according to the first embodiment of the present invention. In addition, FIG. 2 is a configuration diagram showing an image display device in which a modularized image display panel is assembled according to an optimal layout map.

1 and 2, the multi-modular type image display device includes a plurality of image display panels PL1 to PLn arranged according to luminance and color temperature characteristics, and a plurality of image display panels PL1 to PLn to display images. It includes an integrated controller 200 for controlling).

The plurality of image display panels PL1 to PLn are configured to store luminance characteristic data Ydata and color temperature characteristic data Cdata determined by the luminance and color temperature realization characteristic inspection results previously performed, respectively.

In addition, the plurality of image display panels PL1 to PLn are configured in a modularized state so that side portions in the vertical, horizontal, and horizontal directions can be assembled with other image display panels. Accordingly, the plurality of image display panels PL1 to PLn are arranged and assembled according to the optimal arrangement map reflecting the luminance or color temperature characteristics, respectively.

The optimal layout map for the arrangement and assembly of each of the image display panels PL1 to PLn can be generated using a program processed by a separate microprocessor or computer (PC). For example, a computer PC reads both luminance characteristic data Ydata and color temperature characteristic data Cdata set and stored in each of the image display panels PL1 to PLn. In addition, by reflecting the luminance or color temperature characteristics of each of the image display panels PL1 to PLn, a layout map of each of the image display panels PL1 to PLn may be set according to preset conditions. The characteristics of the optimal layout map setting technology will be described in detail later with reference to the accompanying drawings.

The integrated controller 200 stores both luminance characteristic data Ydata and color temperature characteristic data Cdata for the plurality of image display panels PL1 to PLn arranged and assembled according to the optimal arrangement map. Further, the integrated controller 200 compares luminance or color temperature characteristic data (Ydata, Cdata) and preset reference profile data for each of the image display panels PL1 to PLn. Then, the display luminance and color temperature of each image display panel PL1 to PLn are corrected to compensate for luminance or color temperature deviation between the image display panels PL1 to PLn according to the comparison result.

3 is a configuration diagram showing the configuration of a modular video display panel according to the present invention.

As illustrated in FIG. 3, each image display panel PLn includes a code unit 110, a characteristic memory 120, and a panel interface unit 130.

The code unit 110, the characteristic memory 120, and the panel interface unit 130 may be configured on an image non-display surface of the image display panel PLn. For example, the code unit 110, the characteristic memory 120, and the panel interface unit 130 may be configured on the rear surface of the image display panel PLn or any one side.

The code unit 110 includes a barcode or a QR code, so that luminance characteristic data (Ydata) and color temperature characteristic data (Cdata) generated according to the luminance and color temperature realization characteristic inspection results can be stored in a barcode or QR code type. .

The characteristic memory 120 includes at least one RAM or ROM, so that luminance characteristic data (Ydata) and color temperature characteristic data (Cdata) can be stored, respectively.

The panel interface unit 130 supports the luminance characteristic data Ydata and color temperature characteristic data Cdata stored in the characteristic memory 120 to be shared with an external graphic system or an integrated controller 200. Accordingly, the panel interface unit 130 may transmit luminance characteristic data Ydata and color temperature characteristic data Cdata stored in the characteristic memory 120 to the integrated controller 200.

4 is a view for explaining a method of measuring and storing luminance, color temperature, and luminous efficiency characteristics for each modular image display panel before being assembled into a modular type.

As shown in FIG. 4, for each image display panel PL1 to PLn, a luminance and color temperature realization characteristic inspection is performed in an inspection space such as a dark room.

In a specific inspection space, luminance and color temperature characteristics of each of the image display panels PL1 to PLn are measured using an optical measuring instrument CA. Then, when the luminance and color temperature characteristic values for each of the image display panels PL1 to PLn are measured, the characteristic memory 120 includes luminance characteristic data (Ydata) and color temperature characteristic data (Cdata) including the luminance and color temperature characteristic values. And code section 110.

The computer (PC), the microprocessor, and the integrated controller 200 receive luminance characteristic data (Ydata) and color temperature characteristic data (Cdata) for each image display panel (PL1 to PLn) through a separate scanner (SCN). You can. Alternatively, the luminance characteristic data Ydata and color temperature characteristic data Cdata for each image display panel PL1 to PLn may be received through the panel interface unit 130.

5 is a diagram showing luminance characteristics in a randomly arranged state before assembly of a modular image display panel.

Specifically, FIG. 5 (a) shows a state in which the entire image display panels PL1 to PLn are randomly arranged in a state in which an optimal layout map is not applied. 5 (b) is a three-dimensional graph showing luminance characteristics for each position in a state in which all the image display panels PL1 to PLn are randomly arranged. And, Figure 5 (c) is a two-dimensional graph showing the luminance characteristics of the image display panels randomly arranged on any one horizontal line.

5 (a) to 5 (c), since each of the image display panels PL1 to PLn has different luminance characteristics, when they are randomly arranged, the image display panels arranged adjacent to each other The luminance deviation among them randomly occurs. Here, when the luminance deviation between the image display panels adjacent to each other is greater than the luminance deviation of the entire average, the degree of luminance deviation may be recognized by the eye. Accordingly, when the entire image display panels PL1 to PLn are disposed so that luminance variations between the image display panels disposed adjacent to each other can be minimized, it is possible to prevent the eyes from being recognized even if a predetermined luminance variation occurs.

6 is a graph for explaining a method for generating a reference profile and a change in luminance characteristics according to an optimal arrangement map of the present invention.

Specifically, FIG. 6 (a) shows an arrangement configuration in which all the image display panels PL1 to PLn are arranged according to an optimal arrangement map. FIG. 6 (b) is a three-dimensional graph showing luminance characteristics for each position in a state in which all the image display panels PL1 to PLn are arranged according to an optimal arrangement map. In addition, FIG. 6 (c) is a two-dimensional graph showing luminance characteristics and reference profile characteristics of image display panels randomly arranged on a horizontal line.

Referring to FIGS. 6 (a) to 6 (c), an optimal arrangement map for arranging and assembling a plurality of image display panels PL1 to PLn is a luminance characteristic set and stored in each of the image display panels PL1 to PLn. The luminance characteristic may be set to satisfy the preset conditions as much as possible according to the data Ydata.

Specifically, the luminance characteristic data (Ydata) for each image display panel (PL1 to PLn) is analyzed through a microprocessor or a computer (PC) optimal layout map generation program, and the image display panel having the highest luminance characteristic is used. Even the lowest image display panel can be aligned. In addition, the image display panel having the highest luminance characteristic is arranged in the center region of the entire arrangement map, but the image display panel having the lowest luminance characteristic is arranged on the edge of the entire arrangement map. In addition, through the optimal layout map generation program, the entire image display panels PL1 to PLn are arranged on condition that the variation in luminance characteristics of the image display panels disposed adjacent to each other is minimized. Thus, through the optimal layout map generation program, as shown in FIGS. 6 (a) to 6 (c), the entire layout map from the image display panel having the highest luminance characteristic to the image display panel having the lowest luminance characteristic It is possible to generate an optimal arrangement map so that it can be arranged in order from the center region to the edge of.

7 is a flowchart illustrating a method for generating an optimal layout map of a modular image display panel.

Referring to FIG. 7 together with FIG. 6, a microprocessor or a computer (PC) can display the luminance and color temperature implementation characteristic test results from the code unit 110 or the characteristic memory 120 configured in each of the image display panels PL1 to PLn. The generated luminance characteristic data Ydata and color temperature characteristic data Cdata are read (ST1).

Subsequently, through the optimal layout map generation program, the luminance characteristic values of all the image display panels PL1 to PLn are compared with each other to be aligned from the image display panel with the highest luminance characteristic to the lowest image display panel (ST2). .

A reference profile PFD according to luminance or color temperature characteristics of all image display panels PL1 to PLn arranged according to the optimal layout map may be extracted through a microprocessor or a computer (PC) optimal layout map generation program. (ST3). The reference profile PFD is data including luminance or color temperature reference values of the image display panels PL1 to PLn respectively arranged in the horizontal and vertical directions according to the optimal layout map. These luminance or color temperature reference values are preset reference values to improve luminance or color temperature characteristics for each of the image display panels PL1 to PLn, and may be used for luminance or color temperature characteristic deviation correction.

In addition, through the optimal layout map generation program, the image display panel having the highest luminance characteristic is arranged in the center region of the entire arrangement map, but the image display panel having the lowest luminance characteristic is arranged at the edge of the entire arrangement map. To generate an optimal layout map (ST4). At this time, an optimal layout map for arranging the entire image display panels PL1 to PLn may be generated and modified under conditions that minimize variations in luminance characteristics of the image display panels disposed adjacent to each other.

Thereafter, the position of at least one image display panel may be changed according to a comparison result of luminance characteristic values of the entire image display panels PL1 to PLn arranged by the reference profile PFD and the optimal layout map. This may change the position of the image display panel under conditions that minimize variations in luminance characteristics of the image display panels disposed adjacent to each other (ST5).

The optimally generated and determined optimal layout map is transmitted to the integrated controller 200 so that luminance or color temperature deviation between each image display panel PL1 to PLn is compensated through the integrated controller 200 (ST6).

8 is a block diagram showing the configuration of the integrated controller shown in FIGS. 1 and 2 in detail.

Referring to FIG. 8, the integrated controller 200 includes a first profile storage unit 210, a luminance compensation value extraction unit 220, a compensation control signal output unit 230, a reference voltage conversion unit 240, and a first Integrated memory 250.

The first profile storage unit 210 stores the reference profile PFD extracted through the optimal placement map generation program of the microprocessor or computer (PC), and the reference profile PFD and the luminance compensation value extraction unit 220 To share.

The reference profile PFD includes a reference luminance value Pdata for each of the plurality of image display panels PL1 to PLn respectively arranged in the horizontal and vertical directions according to the optimal layout map. The reference luminance value Pdata is a luminance value in which a preset weight is calculated to improve luminance characteristics for each of the image display panels PL1 to PLn, and is used for luminance characteristic deviation correction.

The first integrated memory 250 stores luminance characteristic data Ydata of each of the image display panels PL1 to PLn measured according to the luminance realization characteristic test result, and transmits the luminance characteristic data Ydata to the luminance compensation value extractor 220. The luminance characteristic data Ydata includes the luminance characteristic values of each of the image display panels PL1 to PLn measured according to the luminance implementation characteristic inspection result.

The luminance compensation value extracting unit 220 compares the luminance characteristic values of each of the plurality of image display panels PL1 to PLn with the reference luminance value Pdata of the reference profile PFD, and then displays the plurality of image display panels PL1 to PLn. The luminance characteristic difference value and luminance compensation value YB are extracted for each.

9 is a graph for explaining a method for extracting a luminance compensation value for each modular image display panel and a method for correcting luminance characteristics.

Referring to FIG. 9, the luminance compensation value extraction unit 220 receives the reference luminance values Pdata for each of the image display panels PL1 to PLn included in the reference profile PFD from the first profile storage unit 210. . Then, the luminance characteristic values of the image display panels PL1 to PLn included in the luminance characteristic data Ydata are received from the first integrated memory 250.

Subsequently, the luminance compensation value extracting unit 220 calculates the difference in luminance characteristics between the reference luminance values Pdata and luminance characteristic values for each of the image display panels PL1 to PLn, and the luminance characteristics for each of the image display panels PL1 to PLn. The luminance compensation value YB corresponding to the difference value is extracted.

The compensation control signal output unit 230 illustrated in FIG. 8 varies the reference gamma voltage level for each of the plurality of image display panels PL1 to PLn according to the luminance compensation value YB for each of the plurality of image display panels PL1 to PLn. To generate and output a compensation control signal YS.

The reference gamma voltage of each image display panel PL1 to PLn is between a low potential driving voltage (eg, a ground voltage source or a ground voltage of 0V) and a high potential driving voltage (eg, a preset high potential DC voltage source). The gamma reference voltages of a plurality of levels, which are classified in stages and are used for image grayscale display. Accordingly, the compensation control signal output unit 230 changes the plurality of gamma reference voltage levels that are divided and set between the low potential driving voltage and the high potential driving voltage, except for the low potential driving voltage and the high potential driving voltage. To generate and output a compensation control signal YS.

The reference voltage converter 240 responds to the compensation control signal YS for each of the image display panels PL1 to PLn input from the compensation control signal output unit 230, thereby gamma reference voltage of the image display panels PL1 to PLn. Variable. Specifically, the reference voltage converter 240 excludes the low potential driving voltage and the high potential driving voltage among the reference gamma voltages of the image display panels PL1 to PLn in response to the compensation control signal YS inputted in real time. , A plurality of gamma reference voltage levels divided and set between the low potential driving voltage and the high potential driving voltage are varied. The luminance characteristics of the display image may rise or fall as the plurality of gamma reference voltage levels rise or fall step by step by the compensation control signal YS.

10 is a graph for explaining a method for extracting luminance compensation values and a method for correcting luminance characteristics according to repair and replacement of at least one image display panel.

As shown in FIG. 10, the image display panels PL1 to PLn are arranged through an optimal arrangement map, and the luminance characteristics of each image display panel PL1 to PLn are compensated to drive the image display panels PL1 to PLn. In the process, at least one image display panel (cPL) may be replaced or repaired. Accordingly, luminance characteristic data Ydata and luminance characteristic values from the replaced or repaired image display panel cPL are updated in the first integrated memory 250.

The luminance compensation value extracting unit 220 includes the maintained image display panels PL1 to PLn, and the luminance characteristic values for each replaced or repaired image display panel cPL are also reference luminance values set in the reference profile PFD ( Pdata). And the replaced or repaired image display panel (cPL) also calculates the difference in luminance characteristics between the luminance characteristic value and the reference luminance value (Pdata), and corresponds to the luminance characteristic difference value for each replaced or repaired image display panel (cPL). The luminance compensation value YB is extracted.

Accordingly, the compensation control signal output unit 230 varies the reference gamma voltage level for each replaced or repaired image display panel cPL even in response to the luminance compensation value YB for each replaced or repaired image display panel cPL. To generate and output a compensation control signal YS.

The reference voltage converter 240 may vary the reference gamma voltage of the replaced or repaired video display panel cPL even in response to the compensation control signal YS for each replaced or repaired video display panel cPL.

As described above, the integrated controller 200 stores luminance characteristic data Ydata of the image display panels PL1 to PLn, and uses a reference profile reflecting luminance characteristic information of the image display panels PL1 to PLn. It is possible to compensate for variations in luminance characteristics of the image display panels PL1 to PLn to be minimized.

In particular, by allowing the luminance characteristic values of each image display panel PL1 to PLn to be reflected in real time to the luminance characteristic deviation correction of each image display panel PL1 to PLn, specific image display panels PL1 to PLn are repaired. Even if it is replaced or replaced, it is possible to correct the deviation by reflecting the characteristics of the repaired or replaced image display panel (cPL).

11 is a diagram showing the arrangement of the image display panel and the luminance characteristics of the image display panel according to another method for generating an optimal layout map in the present invention.

Specifically, FIG. 11 (a) shows an arrangement configuration in a randomly arranged state without considering color temperature characteristics of the entire image display panels PL1 to PLn. 11 (b) is a graph showing the distribution of color temperature characteristics of the entire image display panels PL1 to PLn randomly arranged in two dimensions. And, Fig. 11 (c) shows the arrangement configuration in a state in which all the image display panels PL1 to PLn are rearranged in order in consideration of the color temperature characteristic values.

Referring to FIGS. 11 (a) to 11 (c), an optimal arrangement map for arrangement and assembly of a plurality of image display panels PL1 to PLn is a color temperature set and stored in each image display panel PL1 to PLn. The color temperature characteristic may be set to satisfy the preset conditions as much as possible according to the characteristic data Cdata.

Specifically, the color temperature characteristic data (Cdata) for each image display panel PL1 to PLn is analyzed through a microprocessor or a computer (PC) optimal layout map generation program, and the image display panel having the lowest color temperature is analyzed. From the highest image display panel can be sorted in order. In addition, the image display panel having the lowest color temperature characteristics may be arranged starting from one edge region of the entire layout map, but the image display panel having the highest color temperature characteristics may be disposed on the other edge region of the entire layout map. .

12 is a configuration block diagram specifically showing the configuration of the integrated controller according to the second embodiment of the present invention.

Referring to FIG. 12, the integrated controller 200 includes a second profile storage unit 261, an RGB color difference comparison unit 262, a color temperature compensation value output unit 263, a color temperature correction data output unit 264, and a color temperature correction control It includes a signal output unit 265, and a second integrated memory (2660).

The second profile storage unit 261 stores the reference profile PFD extracted through an optimal layout map generation program of a microprocessor or computer (PC), and shares the reference profile PFD with the RGB color difference comparison unit 262 do.

The reference profile PFD includes a reference color temperature value RC_Data for each of the plurality of image display panels PL1 to PLn respectively arranged in the horizontal and vertical directions according to the optimal layout map.

The reference color temperature value RC_Data is a color temperature value in which a preset weight is calculated to improve color temperature characteristics for each of the image display panels PL1 to PLn, and is used for color temperature characteristic deviation correction.

The second integrated memory 266 stores the color temperature characteristic data Cdata of each of the image display panels PL1 to PLn measured according to the luminance realization characteristic test result, and transmits the color temperature characteristic data Cdata to the RGB color difference comparison unit 262.

The color temperature characteristic data Cdata includes color temperature characteristic values of each of the image display panels PL1 to PLn measured according to the color temperature realization characteristic inspection result.

The RGB color difference comparison unit 262 compares the color temperature characteristic values of each of the plurality of image display panels PL1 to PLn and the reference color temperature value RC_Data of the reference profile PFD for each of the plurality of image display panels PL1 to PLn. The color temperature characteristic difference value (CC) is extracted.

13 is a view for explaining a method of correcting color temperature characteristics for each modular image display panel.

Referring to FIG. 13, the RGB color difference comparison unit 262 includes R, G, and B color temperature characteristic values of each of the plurality of image display panels PL1 to PLn and R, G, and B reference color temperature values of the reference profile PFD ( RC_Data) to extract R, G, and B color temperature characteristic difference values CC for each of the plurality of image display panels PL1 to PLn.

The color temperature compensation value extracting unit 220 extracts R, G, and B color temperature compensation values CB corresponding to the R, G, and B color temperature characteristic difference values CC for each of the image display panels PL1 to PLn.

Accordingly. The color temperature correction control signal output unit 265 includes R, G, B for each of the plurality of image display panels PL1 to PLn, and R, G, and B for each of the plurality of image display panels PL1 to PLn according to the color temperature compensation value CB. The RGB compensation control signal RGBvs_n for varying the reference gamma voltage level is generated and output.

The reference gamma voltage for each R, G, and B of each video display panel (PL1 to PLn) is a low potential driving voltage (for example, a ground voltage source or a ground voltage of 0V) and a high potential driving voltage (for example, a preset high voltage). It is divided stepwise between the above DC voltage source) and includes a plurality of levels of reference voltages used for image gradation display. Accordingly, the color temperature correction control signal output unit 265, except for the low-potential driving voltage and the high-potential driving voltage, gradually sets a plurality of gamma reference voltage levels that are divided and set between the low-potential driving voltage and the high-potential driving voltage. The RGB compensation control signal RGBvs_n for varying is generated and output.

As described above, the integrated controller 200 stores color temperature characteristic data Cdata of the image display panels PL1 to PLn, and uses the reference profile reflecting characteristic information of the image display panels PL1 to PLn. The color temperature characteristics of the fields PL1 to PLn may be compensated to be minimized. Accordingly, it is possible to more easily respond to changes in the use environment of the multi-modular video display device.

In particular, by allowing color temperature characteristic values of each of the image display panels PL1 to PLn to be used and reflected in real time for color temperature characteristic deviation correction of each of the image display panels PL1 to PLn, specific image display panels PL1 to PLn Even if they are repaired or replaced, the color temperature characteristics of the repaired or replaced image display panel (cPL) can be reflected to make correction for the color temperature as a whole.

14 is a block diagram illustrating a multi-modular type video display device according to a third embodiment of the present invention.

In FIG. 14, the multi-modal type image display device includes a plurality of image display panels PL1 to PLn arranged and assembled according to luminance and color temperature characteristics, and a plurality of images to be displayed on the plurality of image display panels PL1 to PLn. An integrated controller 200 that controls the display panels PL1 to PLn, and a display unit that displays an optimal layout map for disposing and assembling the image display panels PL1 to PLn on the screen under the control of the integrated controller 200 ( 300).

The integrated controller 200 reads all the luminance characteristic data (Ydata) and color temperature characteristic data (Cdata) set and stored in each image display panel (PL1 to PLn), and the luminance of each image display panel (PL1 to PLn) Alternatively, a target profile is generated according to color temperature characteristics. In addition, an optimal arrangement map of each image display panel PL1 to PLn may be set to satisfy the generated target profile. The optimal layout map is displayed on the display screen of the display unit 300.

The integrated controller 200 uses the luminance or color temperature characteristic data (Ydata, Cdata) and preset reference profile data for a plurality of image display panels PL1 to PLn arranged and assembled according to an optimal layout map, and each image display panel. The display luminance and color temperature of each image display panel PL1 to PLn are controlled to compensate for luminance or color temperature deviation between (PL1 to PLn).

15 is a block diagram showing the configuration of the integrated controller shown in FIG. 14 in detail.

The integrated controller 200 illustrated in FIG. 15 includes a multi-interface unit 270, a profile generator 280, a panel layout map generator 290, a third profile storage unit 211, and a luminance compensation value extractor 221. ), A compensation control signal output unit 231, a reference voltage conversion unit 241, and a third integrated memory 251.

The multi-interface unit 270 reads all the luminance characteristic data (Ydata) and color temperature characteristic data (Cdata) set and stored in each of the image display panels PL1 to PLn, and the profile generation unit 280 and the third integrated memory (251).

The profile generator 280 calculates a luminance or color temperature characteristic value of the image display panels PL1 to PLn by a least square method to generate a target profile Pdata having regression line characteristics. In addition, an optimal placement map PLmap of each image display panel PL1 to PLn may be set to satisfy the generated target profile Pdata. The optimal layout map (PLmap) is displayed on the display screen of the display unit 300.

16 is a graph for explaining a reference profile and an optimal profile generating method according to an optimal placement map. And FIG. 17 is a graph for explaining a method for generating an optimal profile according to an optimal placement map.

16 and 17, the profile generator 280 generates a reference profile PFD using luminance characteristic values included in luminance characteristic data Ydata for each of the image display panels PL1 to PLn. do. Then, the profile generator 280 calculates a luminance characteristic value included in the luminance characteristic data Ydata for each of the image display panels PL1 to PLn using a least square method to generate a target profile Pdata having regression line characteristics. do.

The least-squares operation can be performed using Equation 1 below.

[Equation 1]

) 간의 편차(Residual;

) 를 최소화할 수 있도록 모델 파라미터(p)를 구하는 방식이다. 즉, 프로파일 생성부(280)는 휘도 특성 값과 그의 예측 값 간의 편차가 최소화되는 파라미터로 영상 표시패널(PL1 내지 PLn)별 타겟 프로파일(Pdata)을 설정할 수 있다. Referring to Equation 1 above with reference to FIG. 17, when the luminance characteristic value is determined as an actual value (Ground Truth, y), the least squares method is an actual value y and its predicted value;

) Deviation (Residual;

) To minimize the model parameter (p). That is, the profile generator 280 may set a target profile Pdata for each of the image display panels PL1 to PLn as a parameter in which a deviation between a luminance characteristic value and its predicted value is minimized.

The panel layout map generation unit 290 may compare the luminance characteristic values included in the luminance characteristic data Ydata for each image display panel PL1 to PLn with a reference profile PFD or a target profile Pdata. Accordingly, the panel layout map generation unit 290 is arranged so that the luminance characteristic values of the image display panels PL1 to PLn correspond to the luminance characteristic values of the reference profile PFD or the target profile Pdata most closely, Create a map (PLmap).

18 is a diagram illustrating a display screen for rearranging the image display panel of the display unit illustrated in FIG. 15.

As shown in FIG. 18, the display unit 18 displays the coordinate information according to the optimal placement map PLmap along with a unique number (or product number) for each image display panel PL1 to PLn on a screen, The arrangement position for each image display panel PL1 to PLn is designated.

The third profile storage unit 210 stores the reference profile PFD and the target profile Pdata generated in the profile generation unit 280. Then, the stored reference profile PFD and target profile Pdata are transmitted to the luminance compensation value extraction unit 221.

The luminance compensation value extracting unit 221 compares the luminance characteristic values of each of the plurality of image display panels PL1 to PLn and the target luminance value (PDFD) of the target profile Pdata to compare the plurality of image display panels PL1 to PLn. The luminance characteristic difference value and luminance compensation value YB are extracted for each.

19 is a graph for explaining a method for extracting a luminance compensation value for each modular image display panel and a method for correcting luminance characteristics.

Referring to FIG. 19, the luminance compensation value extraction unit 221 receives target luminance values (PDFD) for each of the image display panels PL1 to PLn included in the target profile Pdata from the third profile storage unit 211. . Then, the luminance compensation value extracting unit 220 receives luminance characteristic values for each of the image display panels PL1 to PLn included in the reference profile PFD and luminance characteristic data Ydata.

The luminance compensation value extraction unit 221 calculates a target luminance value (PDFD) for each of the image display panels (PL1 to PLn) and a luminance characteristic difference value of the luminance characteristic value, and a luminance characteristic difference value for each image display panel (PL1 to PLn) The luminance compensation value YB corresponding to is extracted.

The compensation control signal output unit 231 is a compensation control signal for varying the reference gamma voltage level for each of the plurality of image display panels PL1 to PLn according to the luminance compensation value YB for each of the plurality of image display panels PL1 to PLn Generate and output (YS). The reference gamma voltage of each image display panel PL1 to PLn is between a low potential driving voltage (eg, a ground voltage source or a ground voltage of 0V) and a high potential driving voltage (eg, a preset high potential DC voltage source). It is divided step by step and includes a plurality of levels of reference voltages used for image gradation display. Accordingly, the compensation control signal output unit 231, except for the low potential driving voltage and the high potential driving voltage, changes the plurality of reference voltage levels that are divided and set between the low potential driving voltage and the high potential driving voltage stepwise. Generates and outputs a compensation control signal YS.

The reference voltage converting unit 241 responds to the compensation control signal YS for each of the image display panels PL1 to PLn input from the compensation control signal output unit 231, and thus the reference gamma voltage of the image display panels PL1 to PLn. Variable. Specifically, the reference voltage converter 241 excludes the low potential driving voltage and the high potential driving voltage among the reference gamma voltages of each of the image display panels PL1 to PLn in response to the compensation control signal YS inputted in real time. , A plurality of reference voltage levels divided and set between the low potential driving voltage and the high potential driving voltage are varied.

As described above, the present invention allows the integrated controller 200 to store and share characteristic information on luminance, color temperature, and luminous efficiency for each of the modular image display panels PL1 to PLn, thereby allowing the integrated controller 200 ), It is possible to easily correct luminance and color temperature deviation between image display panels.

In addition, by allowing the characteristic information of each image display panel PL1 to PLn to be used and reflected in real time to the arrangement and characteristic deviation correction of each image display panel PL1 to PLn, specific image display panels PL1 to PLn ) Even if it is repaired or replaced, it is possible to correct the deviation as a whole by reflecting the characteristics of the repaired or replaced video display panel. Accordingly, it is possible to minimize response time required for repair and replacement of a specific video display panel, and reduce manpower and cost.

In addition, the multi-modular type image display apparatus and its driving method according to an embodiment of the present invention can support the optimal arrangement map of the image display panels PL1 to PLn in real time so that the image display efficiency can be optimized. In addition, by using the target profile reflecting the characteristic information of the image display panels PL1 to PLn, the luminance and color temperature deviation of the image display panels PL1 to PLn can be corrected, thereby changing the use environment of the multi-modal image display device. You can respond more easily.

As described above, the present invention has been described with reference to the exemplified drawings, but the present invention is not limited by the examples and drawings disclosed in the present specification. It is obvious that modifications can be made. In addition, although the operation effect according to the configuration of the present invention is not explicitly described while explaining the embodiment of the present invention, it is natural that the effect predictable by the configuration should also be recognized.

200: integrated controller 210: first profile storage
220: luminance compensation value extraction unit 230: compensation control signal output unit
240: reference voltage converter 250: first integrated memory
261: second profile storage unit 262: RGB color difference comparison unit
263: color temperature compensation value output unit 264: color temperature correction data output unit
265: color temperature correction control signal output unit 266: second integrated memory

Claims (18)

A plurality of image display panels that store luminance characteristic data and color temperature characteristic data according to luminance and color temperature realization characteristic inspection results, and are arranged and assembled according to an optimal arrangement map set by each stored luminance or color temperature characteristic; And
And an integrated controller for compensating for luminance or color temperature deviation between the image display panels using luminance or color temperature characteristic data stored in each of the plurality of image display panels and profile data according to the luminance or color temperature characteristics,
Multi-modular type video display.
According to claim 1,
Each of the video display panels
A code unit that stores luminance characteristic data and color temperature characteristic data generated according to the luminance and color temperature realization characteristic test results in a barcode or QR code type;
A characteristic memory in which the luminance characteristic data and color temperature characteristic data are respectively stored, and
And a panel interface unit that transmits luminance characteristic data and color temperature characteristic data stored in the characteristic memory to the integrated controller,
Multi-modular type video display.
According to claim 2,
The optimal layout map is generated through a microprocessor or computer optimal layout map generation program,
The optimal layout map generating program arranges the image display panel having the highest luminance characteristic to the lowest image display panel, and the image display panel having the highest luminance characteristic is arranged in the center region of the entire layout map, but has the lowest luminance characteristic. By arranging the video display panels on the edge of the entire layout map,
Generating the optimal arrangement map so that it can be arranged in order from the center area to the edge of the entire arrangement map from the image display panel having the highest luminance characteristic to the image display panel having the lowest luminance characteristic,
Multi-modular type video display.
According to claim 2,
The integrated controller
A first profile storage unit for storing the reference profile extracted through the optimal layout map generation program;
A first integrated memory for storing and sharing luminance characteristic data including luminance characteristic values of each of the plurality of image display panels; And
And a luminance compensation value extracting unit that extracts luminance characteristic difference values and luminance compensation values for each of the plurality of image display panels by comparing luminance characteristic values of each of the plurality of image display panels and luminance characteristic values of the reference profile,
Multi-modular type video display.
The method of claim 4,
The luminance compensation value extraction unit
By comparing the luminance characteristic value of each replaced or repaired video display panel with a reference luminance value set in the reference profile, and calculating a difference value between the luminance characteristic value of the replaced or repaired image display panel and the reference luminance value, A luminance compensation value corresponding to the difference in luminance characteristics for each of the replaced or repaired image display panels is extracted,
The compensation control signal output unit generates a compensation control signal for varying a reference gamma voltage level for each replaced or repaired video display panel in response to a luminance compensation value for each replaced or repaired video display panel,
Multi-modular type video display.
The method of claim 4,
The integrated controller
A compensation control signal output unit configured to output a compensation control signal for varying a reference gamma voltage level for each of the plurality of image display panels according to the luminance compensation values of the plurality of image display panels; And
And a reference voltage converter configured to vary a reference gamma voltage level of the video display panel in response to the compensation control signal for each video display panel.
Multi-modular type video display.
According to claim 2,
The optimal layout map is generated through a microprocessor or computer optimal layout map generation program,
The optimal layout map generation program analyzes color temperature characteristic data stored in each of the image display panels, and arranges in order from the image display panel with the lowest color temperature to the highest image display panel, but displays the image with the lowest color temperature characteristic. The panel is arranged from one edge region of the entire layout map, and the image display panel with the highest color temperature characteristics is placed on the condition that it is placed on the other edge region of the entire layout map.
Multi-modular type video display.
The method of claim 7,
The integrated controller
A second profile storage unit that stores a reference profile extracted through the optimal layout map generation program;
A second integrated memory for storing color temperature characteristic data of each of the image display panels measured according to the color temperature realization characteristic test results;
R, G, and B color temperature characteristic values of each of the plurality of image display panels are compared with R, G, and B reference color temperature values of the reference profile to extract R, G, and B color temperature characteristic difference values for each of the plurality of image display panels RGB color difference comparison unit;
A color temperature compensation value extraction unit for extracting R, G, and B color temperature compensation values corresponding to the R, G, and B color temperature characteristic difference values for each image display panel; And
A color temperature correction control signal output for generating and outputting an RGB compensation control signal for varying R, G, and B reference gamma voltage levels for each of the video display panels according to the R, G, and B color temperature compensation values for each of the plurality of image display panels Containing wealth,
Multi-modular type video display.
According to claim 1,
Further comprising a display unit for displaying the optimal layout map for the placement and assembly of each image display panel on the screen under the control of the integrated controller,
The integrated controller
A target profile is generated using luminance characteristic data set and stored in each image display panel and color temperature characteristic data, and an optimal layout map of each image display panel is set to satisfy the generated target profile, so that the screen of the display unit is set. Denoted by,
Multi-modular type video display.
The method of claim 9,
The integrated controller
A multi-interface unit that reads and transmits the luminance characteristic data and the color temperature characteristic data set and stored in each image display panel to a third integrated memory,
Profile generation unit that calculates the luminance or color temperature characteristic value of each image display panel by least-squares method to generate the target profile having regression line characteristics and to set the optimal placement map of each image display panel to satisfy the target profile ,
And a luminance compensation value extracting unit that extracts luminance characteristic difference values and luminance compensation values for each of the plurality of image display panels by comparing luminance characteristic values of each of the plurality of image display panels and target luminance values of the target profile,
Multi-modular type video display.

Placing and assembling a plurality of image display panels storing luminance characteristic data and color temperature characteristic data according to the results of the luminance and color temperature realization characteristic inspection performed in advance according to an optimal arrangement map set by the luminance or color temperature characteristic; And
Compensating for luminance or color temperature deviation between the image display panels by using luminance or color temperature characteristic data stored in each of the plurality of image display panels and profile data according to the luminance or color temperature characteristics,
Method of driving a multi-modular type video display device.
The method of claim 11,
The optimal layout map is generated through a microprocessor or computer optimal layout map generation program,
The optimal layout map generation program generates the optimal layout map so that it can be arranged in order from the center region to the edge of the entire layout map from the image display panel having the highest luminance characteristic to the image display panel having the lowest luminance characteristic,
Method of driving a multi-modular type video display device.
The method of claim 12,
Compensating for the luminance deviation between the image display panels is
Extracting a reference profile through the optimal layout map generation program;
Storing and sharing luminance characteristic data including luminance characteristic values of each of the plurality of image display panels; And
Comprising the steps of extracting a luminance characteristic difference value and a luminance compensation value for each of the plurality of image display panel by comparing the luminance characteristic value of each of the plurality of image display panel and the luminance characteristic value of the reference profile,
Method of driving a multi-modular type video display device.
The method of claim 13,
The step of extracting the luminance compensation value
By comparing the luminance characteristic value of each replaced or repaired video display panel with a reference luminance value set in the reference profile, and calculating a difference value between the luminance characteristic value of the replaced or repaired image display panel and the reference luminance value, Extracting a luminance compensation value corresponding to a difference in luminance characteristics for each of the replaced or repaired image display panels; And
Further comprising the step of generating a compensation control signal for varying the reference gamma voltage level for each of the replaced or repaired video display panel in response to the luminance compensation value for each of the replaced or repaired video display panel,
Method of driving a multi-modular type video display device.
The method of claim 11,
The optimal layout map is generated through a microprocessor or computer optimal layout map generation program,
The optimal layout map generation program analyzes color temperature characteristic data stored in each image display panel, so that the image display panel having the lowest color temperature characteristic is arranged from one edge region of the entire layout map, and the image having the highest color temperature characteristic. The display panel generates the optimal layout map on condition that it is disposed on the other edge area of the entire layout map,
Method of driving a multi-modular type video display device.
The method of claim 15,
Compensating for color temperature deviation between the image display panels is
R, G, and B color temperature characteristic values of each of the plurality of image display panels are compared with R, G, and B reference color temperature values of the reference profile to extract R, G, and B color temperature characteristic difference values for each of the plurality of image display panels To do;
Extracting R, G, and B color temperature compensation values corresponding to R, G, and B color temperature characteristic difference values for each image display panel; And
And generating and outputting an RGB compensation control signal for varying R, G, and B reference gamma voltage levels for each image display panel according to the R, G, and B color temperature compensation values for each of the plurality of image display panels,
Method of driving a multi-modular type video display device.
The method of claim 11,
Displaying the optimal layout map for the arrangement and assembly of each image display panel on a screen of a display unit; And
The method further includes generating a target profile using luminance characteristic data set and stored in each image display panel and color temperature characteristic data, and setting an optimal arrangement map of each image display panel to satisfy the generated target profile. doing,
Method of driving a multi-modular type video display device.
The method of claim 17,
Compensating for the luminance deviation between the image display panels is
Generating the target profile having a regression line characteristic by calculating a luminance or color temperature characteristic value of each image display panel using a least-squares method, and setting an optimal layout map of each image display panel to satisfy the target profile; And
Comparing the luminance characteristic value of each of the plurality of image display panels and the target luminance value of the target profile, and extracting a luminance characteristic difference value and a luminance compensation value for each of the plurality of image display panels,
Method of driving a multi-modular type video display device.

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