KR20160027523A - Display device - Google Patents

Abstract

The present embodiments relate to a display device. The display panel is successively sensed according to a sensing unit. If the sensing process is completed according to the sensing unit, a flag is set according to each sensing unit. Thereby, a position where the sensing process is completed can be checked. Efficient sensing and compensation function can be provided. The display device comprises a display panel; sensing parts; a memory part; and a compensation part.

Description

Display device {DISPLAY DEVICE}

The present invention relates to a display device.

BACKGROUND ART Demands for a display device for displaying an image have been increasing in various forms as an information society has developed. In addition, a liquid crystal display device (LCD), a plasma display device (Plasma Display Device) OLED (Organic Light Emitting Display Device), and the like.

As the driving time of the display panel of such a display device becomes longer, a degradation phenomenon of the display panel appears, and the uniformity of display characteristics of the display panel may be deteriorated.

The deterioration phenomenon of the display panel which deteriorates the uniformity of the display panel is caused by the change and shift of the intrinsic property value of the circuit element formed in each subpixel of the display panel and the characteristic property between the circuit elements formed in each subpixel of the display panel Deviations are the main reason.

Here, the circuit element formed in each sub-pixel of the display panel may include at least one transistor. For example, when the display panel is an organic light emitting display panel, each sub-pixel includes one organic light emitting diode An organic light emitting diode (OLED), two or more transistors, and one or more capacitors.

The intrinsic property value of such a circuit element may include threshold voltage, mobility, etc. of the transistor, and may include a threshold voltage of the organic light emitting diode.

As described above, when the characteristic characteristic of the circuit element changes and shifts, and the deviation of intrinsic characteristic values between circuit elements occurs and the display characteristic of the display panel deteriorates, the display panel is sensed, that is, A technique for sensing and compensating for inherent characteristic values of circuit elements (e.g., transistors, organic light emitting diodes, etc.) has been proposed.

In order to apply the above-described compensation technique, the display panel is sensed. In some cases, the sensing process may be interrupted midway due to a predetermined reason (for example, power-off, etc.) do.

In this way, if the sensing is stopped for a sudden reason before sensing all the display panels, all the sensing data generated in the sensing process before the sensing stop time disappear.

Accordingly, there arises a problem that the sensing data necessary for data compensation can not be updated in order to compensate the luminance of each sub-pixel. The absence of such updated sensing data can cause screen anomalies.

It is an object of the present embodiments to provide a display device capable of confirming a position where a sensing process is completed by setting a flag for a sensing unit in which the sensing process is completed when the display panel is sequentially sensed for each sensing unit .

Another object of the embodiments is to mark the position where the sensing process is completed when the sensing process is interrupted before sensing all the display panels, to confirm the marked position when the sensing timing is reached, And to allow the sensing process to resume after the completed position.

It is still another object of the present embodiments to provide a display device that stores sensing data for at least one subpixel completed before the sensing is stopped even if the sensing is interrupted before all the display panels are sensed.

It is a further object of the present embodiments to provide a display device that sequentially performs sensing for each color subpixel group.

One embodiment includes a display panel in which a plurality of data lines and a plurality of gate lines are formed, a plurality of subpixels are formed to define a plurality of pixels, and a sensing line corresponding to at least one subpixel column is formed, A plurality of sensing units for sensing a subpixel included in a subpixel column connected to each sensing line, the sensing unit sequentially performing a sensing process for each predetermined sensing unit to output sensing data; A memory for storing a flag set as information indicating a completed sensing unit, and a compensating unit for performing data compensation based on the sensing data for each sensing unit.

In another embodiment, a display panel in which a plurality of data lines and a plurality of gate lines are formed, a plurality of subpixels are formed, and a plurality of sensing lines are formed, and a sensing process is sequentially performed for each color subpixel group A sensing unit for outputting sensing data; and a compensating unit for performing compensation processing on data to be supplied to each sub-pixel based on the sensing data.

In another embodiment, a display panel in which a plurality of data lines and a plurality of gate lines are formed, a plurality of subpixels are formed, and a plurality of sensing lines are formed, and a plurality of sensing lines, And a sensing unit for sensing at least one subpixel completed before the sensing is stopped even if sensing is interrupted in a state where sensing of all the subpixels formed on the display panel is not completed, A display device including a memory for storing data is provided.

In another embodiment, a display panel in which a plurality of data lines and a plurality of gate lines are formed, a plurality of subpixels are formed, and a plurality of sensing lines are formed, and a plurality of sensing lines, A sensing unit for generating sensing data based on the sensed voltage and outputting the sensed data; and a display unit for sensing the position where the sensing is completed before the sensing is stopped in the state where the sensing of all the subpixels formed on the display panel is incomplete, And a memory for storing the display data.

According to the embodiments as described above, when the display panel is sequentially sensed for each sensing unit, by setting a flag for the sensing unit for which the sensing process is completed, the position where the sensing process is completed can be confirmed, It is possible to provide an efficient sensing and compensation function.

According to the embodiments, when the sensing process is interrupted before sensing the entire display panel, the position where the sensing process is completed is marked so that when the sensing timing is reached later, It is possible to perform a sensing process and a quick sensing and compensation process.

According to the embodiments, when the sensing process is interrupted before sensing all the display panels, the position where the sensing process is completed is marked. When the sensing timing is reached, the marked position is confirmed, The sensing process can be restarted from the position after the completion of the sensing, thereby preventing the screen abnormal phenomenon due to sensing interruption, providing an efficient sensing and compensation function, and shortening the sensing time.

In addition, according to the present embodiments, even if the sensing is stopped halfway before sensing the entire display panel, sensing data for at least one subpixel completed before the sensing stop is stored, thereby enabling partial sensing resumption Thus, it is possible to provide an efficient sensing and compensation function, prevent a screen abnormal phenomenon due to sensing stop, and shorten the sensing time as well.

In addition, according to the embodiments, the sensing and compensation efficiency can be enhanced by collecting the subpixels of the same color that can show similar image characteristics and sequentially sensing the subpixel group for each color.

1 is a schematic system configuration diagram of a display device according to embodiments.
2 is an exemplary view of an equivalent circuit diagram of subpixels of a display panel according to embodiments.
FIG. 3A schematically shows pixels of three sub-pixel structures in a display panel according to embodiments.
FIG. 3B is a view schematically showing pixels of four sub-pixel structures in the display panel according to the embodiments.
4 is a plan view of a display device according to embodiments.
5A is a diagram showing a sensing processing method for each color of a display device according to the embodiments.
FIG. 5B is a diagram illustrating a sensing processing method for each line of the display apparatus according to the embodiments.
6A to 6H are views showing a color sensing process sequence for a display panel according to the embodiments.
FIGS. 7A to 7H are views showing a line-by-line sensing process sequence for the display panel according to the embodiments.
8 is a view for explaining a position marking technique of the sensing process of the display device according to the embodiments.
FIG. 9 is a diagram illustrating the resumption of the partial sensing process using the position marking technique of the sensing process of the display device according to the embodiments.
10 is a view for explaining a location marking technique and a validity checking technique of the sensing process of the display device according to the embodiments and a sensing process using the same.
FIG. 11 is a view illustrating a position marking technique and a validity verification technique of the sensing process of the display device according to the embodiments, and an example of the sensing process using the technique.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the components from other components, and the terms do not limit the nature, order, order, or number of the components. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, Quot; intervening "or that each component may be" connected, "" coupled, "or " connected" through other components.

1 is a schematic system configuration diagram of a display apparatus 100 according to embodiments.

Referring to FIG. 1, a display device 100 according to embodiments includes a plurality of data lines DL 1, DL 2,..., C (C is a number of 3 or 4 as the number of colors) × M ..., GL N, or GL 1, ..., GL N, GL 1 ', ..., N N (N is a natural number of 1 or more) or 2N gate lines A data driver 120 for driving the C × M data lines DL 1, DL 2,..., And DL C × M; A gate driver 130 for sequentially driving gate lines GL 1, ..., GL N or GL 1, ..., GL N, GL 1 ', ..., GL N' A timing controller 140 for controlling the gate driver 120 and the gate driver 130, and the like.

The timing controller 140 starts scanning according to the timing implemented in each frame and switches the image data input from the interface according to the data signal format used by the data driver 120 to output the converted image data Data And controls the data driving at a suitable time according to the scan.

The timing controller 140 controls various control signals such as a data control signal (DCS) and a gate control signal (GCS) to control the data driver 120 and the gate driver 130 Can be output.

The gate driver 130 supplies scan signals of an On voltage or an Off voltage to N or 2N gate lines GL 1 through GL N under the control of the timing controller 140. [ , Or GL 1, ..., GL N, GL 1 ', ..., GL N' sequentially to drive a plurality of gate lines GL sequentially.

The data driver 120 stores the inputted image data Data in a memory (not shown) under the control of the timing controller 140 and stores the image data Data in an analog form And supplies them to the C × M number of data lines DL 1, DL 2,..., DL C × M so that the C × M data lines DL 1, DL 2, , DL C M).

The data driver 120 may include a plurality of data driver ICs (also referred to as source driver ICs), such as a tape automated bonding (TAB) Or may be directly connected to a bonding pad of the display panel 110 or formed directly on the display panel 110 by a Tape AutoMated Bonding method or a chip on glass (COG) 110).

The gate driver 130 may be located on one side of the display panel 110 as shown in FIG. 1 or on both sides of the display panel 110 divided into two, depending on the driving method.

The gate driver 130 may include a plurality of gate driver ICs. The plurality of gate driver integrated circuits may be a Tape AutoMated Bonding (TAB) May be connected to a bonding pad of the display panel 110 in a COG method or may be directly formed on the display panel 110 by being implemented in a GIP (Gate In Panel) type, (Not shown).

The display device 100 shown in FIG. 1 may include, for example, a liquid crystal display device (LCD), a plasma display device, an organic light emitting display device (OLED) ) Or the like.

Depending on the type of the display device 100, circuit elements such as transistors and capacitors are formed in each of the C x M x N subpixels (SP: Sub Pixel) formed on the display panel 110. For example, in the case where the display panel 110 is an organic light emitting display panel, each sub pixel includes a circuit element such as an organic light emitting diode (OLED), two or more transistors and one or more capacitors, Respectively.

FIG. 2 is an illustration of an equivalent circuit diagram of each subpixel when the display panel 110 according to the embodiments is an organic light emitting display panel.

In the case where the display panel 110 is an organic light emitting display panel, each of the C x M x N subpixels SP formed in the display panel 110 includes one organic light emitting diode (OLED) Circuit elements such as two or more transistors and one or more capacitors are formed.

Referring to FIG. 2, each sub-pixel includes three transistors DT, T1, and T2 and one capacitor Cstg to drive one organic light emitting diode (OLED) (Transistor) 1C (Capacitor) structure.

The sub-pixel structure of FIG. 2 is an example of a structure in which a sensing and compensation function is applied to compensate for intrinsic property values (for example, threshold voltage, mobility) of the driving transistor DT.

Compensation of the intrinsic property value of the driving transistor DT is used in the same sense as the luminance compensation of the subpixel, and in order to compensate for luminance, the data to be supplied to the subpixel must be changed. That is, the transistor characteristic value compensation, luminance compensation, data compensation and pixel compensation are all used in the same sense.

The driving transistor DT is connected between the third node N3 to which the driving voltage EVDD supplied from the driving voltage line DVL is applied and the organic light emitting diode OLED, And drives a diode (OLED).

The first transistor T1 is controlled according to the first scan signal SCAN supplied from the first gate line GL and is connected to the data line DL and the driving transistor DT for supplying the data voltage Vdata. And is connected between the first node (N1, gate node).

A storage capacitor Cstg is connected between the first node N1 and the second node N2 of the driving transistor DT and serves to maintain a constant voltage for one frame.

The second transistor T2 is controlled by a second scan signal SENSE supplied from the second gate line GL 'and is supplied with a reference voltage Vref: Reference voltage supplied from a reference voltage line RVL And a second node N2 of the driving transistor DT.

On the other hand, a switch SW is connected to one side of the reference voltage line RVL.

The switch SW is controlled such that the reference voltage Vref is supplied to the reference voltage line RVL in accordance with the switching timing control signal or an analog digital converter (ADC) (RVL).

If the switch SW connects the analog-to-digital converter (ADC) corresponding to the sensing unit to the reference voltage line RVL in the state where the second transistor T2 is turned on, the analog-to-digital converter (ADC) The voltage of the second node N2 (sensing node) of the driving transistor DT can be sensed. By sensing the voltage of the sensing node of each subpixel, that is, the second node N2 of the driving transistor DT, inherent characteristic values such as threshold voltage and mobility of the driving transistor DT can be sensed in this way .

At this time, the reference voltage line RVL corresponds to a "sensing line" in which the voltage of the second node N2 of the driving transistor DT is sensed. Here, the number of sensing lines is equal to the number of analog-to-digital converters (ADCs) corresponding to the sensing units.

The switching timing control signal described above is used to set the voltage of the second node N2 of the driving transistor DT in accordance with the driving operation of the display mode or the sensing mode, / Off), which can be output from the timing controller 140.

Referring to FIG. 2, each sub-pixel receives two scan signals SCAN and SENSE through two gate lines GL and GL '. In this case, in FIG. 1, each of the gate lines GL 1, ..., GL N (where N is a natural number of 1 or more) can be regarded as being composed of two gate lines. In other words, 2N gate lines GL 1, ..., GL N, GL 1 ', ..., GL N' are formed in the display panel 110.

In some cases, each sub-pixel may receive two scan signals SCAN and SENSE through one gate line GL. In this case, unlike FIG. 1, the N display lines GL 1,..., GL N may be formed on the display panel 110.

On the other hand, as described above, the C × M × N sub-pixels SP are formed in the display panel 110, and the M × N pixels (P: Pixel) is defined.

Here, "C" is the number of colors of the subpixel, which is 3 or 4.

That is, when C = 3, M × N pixels (P) of an RGB sub-pixel structure are defined on the display panel 110, and when C = 4, M × N pixels (P) are defined.

3A, when the number of colors C of a subpixel is 3, a subpixel (R) corresponding to red, a subpixel (G) corresponding to green, and a subpixel The sub-pixel B constituting one pixel.

3A, each pixel P (m, n) includes a sub-pixel R corresponding to red, a sub-pixel R corresponding to red And each subpixel R, G, and B is composed of one data line and two subpixels B in the case of having the 3T1C structure of Fig. 2 It is connected to the gate line.

Referring to FIG. 3A, the subpixel R corresponding to red is connected to the (3m-2) -th data line DL 3m-2 and the n-th pair of gate lines GL n and GL n '. The subpixel G corresponding to green is connected to the (3m-1) -th data line DL 3m-1 and the n-th pair of gate lines GL n and GL n '. The subpixel B corresponding to the blue color is connected to the 3mth data line DL 3m and the nth pair of gate lines GL n and GL n '.

Referring to FIG. 3B which schematically shows pixels of the RWGB subpixel structure, when the number of colors C of the subpixel is 4, a subpixel (R) corresponding to red, a subpixel (W) corresponding to white, The subpixel G corresponding to the blue color and the subpixel B corresponding to the blue color constitute one pixel.

3B, each pixel P (m, n) is divided into subpixels R, green, and blue corresponding to red when C = 4, 1? M? M, 1? N? N, And each subpixel R, G, and B is composed of one data line and two subpixels B in the case of having the 3T1C structure of Fig. 2 It is connected to the gate line.

Referring to FIG. 3B, the subpixel R corresponding to the red color is connected to the 4m-3th data line DL 4m-3 and the n-th pair of gate lines GL n and GL n '. The subpixel W corresponding to white is connected to the 4m-2th data line DL 4m-2 and the n-th pair of gate lines GL n and GL n '. The subpixel G corresponding to green is connected to the 4m-1th data line DL 4m-1 and the nth pair of gate lines GL n and GL n '. The subpixel B corresponding to the blue color is connected to the 3mth data line DL 4m and the nth pair of gate lines GL n and GL n '.

Hereinafter, for convenience of explanation, each subpixel has a 3T1C structure illustrated in FIG. 2, and each pixel is described as an RWGB subpixel structure illustrated in FIG. 3B.

On the other hand, a drive voltage EVDD and a reference voltage Vref must be applied to each subpixel. ., DL C M) and N or 2N gate lines (GL 1, ..., GL N, or GLN) are connected to the display panel 110, The driving voltage lines DVL (1), ..., GL N, GL N, GL 1, ..., GL N, GL 1 ', ..., GL N' (Driving Voltage Line) and a reference voltage line (RVL) corresponding to at least one subpixel column.

In the following examples, a driving voltage line DVL is formed so as to correspond to two subpixel columns, and a reference voltage line RVL corresponding to four subpixel columns, i.e., one pixel column, ) Is formed.

4 is a plan view of the display device 100 according to the embodiments. In Fig. 4, C = 4. 4, it is assumed that one pixel is composed of four sub-pixels (R, W, G, B). That is, C = 4.

Referring to FIG. 4, 4M data lines DL 1, DL 2, ..., DL 4M and N gate lines GL 1, ..., GL N are formed on a display panel 110 , 4 x M x N subpixels are formed to define M x N pixels.

Referring to FIG. 4, two driving voltage lines DVL and DVL 'for supplying a driving voltage EVDD may be formed for each pixel column. A reference voltage line RVL for supplying a reference voltage Vref may be formed for each pixel column.

Referring to FIG. 4, two driving voltage lines DVL and DVL 'formed corresponding to each pixel column are arranged on both sides of each pixel column, that is, on the left side of the subpixel R corresponding to red And may be formed on the right side of the sub-pixel B corresponding to the blue color in parallel with the data line formation direction. In FIG. 4, DVL is denoted by DVL 1, DVL m, and DLV M, and DVL 'is denoted by DVL 1', DVL m ', DVL M', and the like in order to distinguish pixel columns.

Referring to FIG. 4, one of the two driving voltage lines DVL and DVL 'corresponding to each pixel column has one driving voltage line DVL, The driving voltage EVDD is supplied to the subpixel W corresponding to green and the driving voltage EVLD is supplied to the remaining driving voltage line DVL ' EVDD).

Referring to FIG. 4, reference voltage lines RVL 1, ..., RVL m, ..., RVL M are formed so as to correspond to four subpixel columns, that is, one pixel column. That is, in the display panel 110, there are M reference voltage lines RVL 1, ..., RVL m, ..., RVL M.

For example, one reference voltage line RVL formed corresponding to each pixel column is arranged in the middle of each pixel column, that is, between the subpixel W corresponding to white and the subpixel G corresponding to green, And may be formed parallel to the forming direction. However, in FIG. 4, the RVL is denoted by RVL 1, RVL m, RLV M, etc. in order to distinguish the pixel columns.

Referring to FIG. 4, one reference voltage line RVL formed corresponding to each pixel column corresponds to a subpixel R corresponding to red, a subpixel W corresponding to white, The reference voltage Vref can be supplied to the subpixel G corresponding to the blue color and the subpixel B corresponding to the blue color.

Here, one reference voltage line RVL formed corresponding to each pixel column is a "sensing line" for sensing the display panel 110, and hereinafter also referred to as a sensing line .

4, the display device 100 is connected to M reference voltage lines RVL 1, ..., RVL m, ..., RVL M, that is, M sensing lines, respectively M sensing units 400-1, ..., 400-m, ..., and 400-M that are present one by one.

That is, one analog digital converter (ADC) is connected to one end of each of the M reference voltage lines (RVL 1, ..., RVL m, ..., RVL M) as a sensing unit.

In other words, in the display device 100, the number of the sensing units 400-1, ..., 400-m, ..., 400-M, 1? M? M).

Referring to FIG. 4, each of the M sensing units 400-1 to 400-m senses sub-pixels included in a sub-pixel column corresponding to the sensing line .

For example, the first sensing unit 400-1 includes a pixel row P (1,1), P (1,2), ..., P (1, N) of the sub-pixels. (m, 1), P (m, 2), ..., P (m, N)) connected to the mth sensing line RVL m is connected to the mth sensing unit 400- And the included sub-pixels are sensed. (M, 1), P (M, 2), ..., P (M, N)) connected to the Mth sensing line RVL M are connected to the Mth sensing unit 400- And the included sub-pixels are sensed.

Each of the M sensing units 400-1, ..., 400-m, ..., and 400-M can not simultaneously sense the sub-pixels included in the sub-pixel column corresponding to the sensing line, Of the sub-pixels.

Each of the M sensing units 400-1 to 400-m is connected to corresponding sensing lines RVL 1, ..., RVL m, ..., RVL M W, G and B included in P (1,1) among the subpixels included in the corresponding pixel column connected to the pixel P (1,1).

The first sensing unit 400-1, the m-th sensing unit 400-m, and the M-th sensing unit 400-N simultaneously sense R of the first row and simultaneously sense W of the first row Sensing at the same time, sensing G of the first row at the same time, and sensing B of the first row at the same time.

Each of the M sensing units 400-1 to 400-m detects a sensing process (SP) for each sensing unit (SU) So that the sensing data can be output.

Referring to FIG. 4, the display device 100 displays the sensing data for each sensing unit output from the M sensing units 400-1,..., 400-m, ..., A compensation unit 410 for performing a compensation process on the luminance of the sub-pixel, and a sensing unit 400-1, ..., 400-m, ..., And a memory 420 for storing "Flag" set as information indicating the sensing unit for which the sensing process is completed each time the process is completed.

The above-mentioned flag is a kind of marker that marks the position (sensing unit) where the sensing process is completed.

According to the above description, the sensing process of the M sensing units 400-1, ..., 400-m, ..., 400-M is managed for each sensing unit, It can be known accurately.

Further, every time the sensing process is completed for each sensing unit, the flag " Flag "which is set as the information indicating the sensing unit for which the sensing process is completed is stored in the memory 420, The location can be marked so that the exact location of the sensing can be verified.

Since the flag " Flag "set as the information indicating the sensing unit in which the sensing process is completed is stored in the memory 420 every time the sensing process is completed for each sensing unit, Even if the power source is suddenly turned off in a state where the sensing of the power source is not completed, the position information of the sensing completion before power off is stored in the memory 420 as a flag.

Therefore, when the sensing process is interrupted and restarted for some reason (for example, power-off, etc.) before the completion of the sensing process of the display panel 110, The flag can be confirmed and the sensing process can be resumed from the next sensing unit of the sensing completion sensing unit.

Thus, by partially restarting the sensing process for the display panel 110, the time required for sensing the entire display panel 110 can be significantly reduced.

On the other hand, the above-mentioned "sensing unit" is a unit for sensing the display panel 110.

For example, each sensing unit may be a sub pixel group of the same color or a same sub pixel row.

The sensing processing method can be changed according to the sensing step.

When each sensing unit is a subpixel group of the same color, a "color sensing processing method" can be performed as shown in FIG. 5A. When each sensing unit is the same subpixel row, "Can be performed.

In the following, the types of sensing units and the sensing processing method accordingly will be described with reference to Figs. 5A and 5B, Figs. 6A to 6H, and 7A to 7H.

5A is a diagram showing a sensing processing method for each color of the display device 100 according to the embodiments. FIG. 5B is a diagram illustrating a line-by-line sensing processing method of the display device 100 according to the embodiments. 6A to 6H are views showing a color sensing process sequence for the display panel 110 according to the embodiments. 7A to 7H are diagrams illustrating a line-by-line sensing process sequence for the display panel 110 according to the embodiments.

Referring to FIG. 5A, when four sensing units SU R, SU W, SU G, and SU B exist in the display device 100 in the case where each sensing unit is a sub pixel group of the same color do.

Referring to FIG. 5A, the sensing unit SU R is all R sub-pixels formed on the display panel 110. The sensing unit SU W is all W subpixels formed on the display panel 110. The sensing unit SU G is all G subpixels formed on the display panel 110. The sensing unit SU B is all B sub-pixels formed on the display panel 110.

Referring to FIGS. 6A and 6B, the M sensing units 400-1, 400-m, ..., and 400-M are configured to group all the R subpixels formed on the display panel 110, And performs sensing processing on the sensing unit SU R by sequentially sensing each pixel row.

Referring to FIG. 6C and FIG. 6D, the M sensing units 400-1 to 400-m, ..., and 400-M are configured to detect all the W subpixels formed on the display panel 110, And performs sensing processing on the sensing unit SU W by sequentially sensing each pixel row.

Referring to FIGS. 6E and 6F, the M sensing units 400-1, 400-m, ..., and 400-M are configured to group all the G subpixels formed on the display panel 110 And performs sensing processing on the sensing unit SU G by sequentially sensing each pixel row.

Referring to FIGS. 6G and 6H, the M sensing units 400-1, 400-m, ..., and 400-M are configured to group all the B subpixels formed on the display panel 110, And performs sensing processing on the sensing unit SU B by sequentially sensing each pixel row.

As described above, when each sensing unit is a " subpixel group of the same color "and performs a" color sensing process ", subpixels exhibiting similar characteristics can be collected and subjected to sensing processing. Accordingly, even if the sensing process is interrupted, the sensing data obtained as a result of the sensing process for the subpixels exhibiting similar characteristics can be maintained, and the sensing process for the subpixels having different characteristics can be resumed, Data acquisition can be enabled.

5B, when the sensing units are the same sub pixel row, the display device 100 is provided with sensing units SU 1, SU 2 (N) , ..., SU N).

Referring to FIG. 5B, the sensing unit SU 1 is a subpixel in a first subpixel row in the display panel 110, the sensing unit SU 2 is a subpixel in a second subpixel row in the display panel 110, The sensing unit SU N-1 is the subpixels in the (N-1) th subpixel row in the display panel 110, and the sensing unit SU N is the subpixels in the Nth subpixel row in the display panel 110.

Referring to FIGS. 7A to 7D, the M sensing units 400-1, ..., 400-m, ..., and 400-M are arranged in the sub- By sequentially sensing the pixels by color, i.e., as shown in FIG. 7A, R sub-pixels among the sub-pixels in the first sub-pixel row in the display panel 110 are simultaneously sensed, As shown, by sensing W subpixels simultaneously and then simultaneously sensing G subpixels, as shown in FIG. 7C, and then simultaneously sensing B subpixels, as shown in FIG. 7D, And performs a sensing process for SU 1.

Referring to FIGS. 7E to 7H, the M sensing units 400-1, 400-m, ..., 400-M are arranged in the (N-1) By sequentially sensing the subpixels in the N-1th subpixel row in the display panel 110, that is, by sensing the R subpixels simultaneously in the display panel 110, as shown in FIG. 7E, As shown in FIG. 7F, the W subpixels are simultaneously sensed and then the G subpixels are sensed simultaneously, as shown in FIG. 7G, and then the B subpixels are sensed simultaneously Thereby performing a sensing process on the sensing unit SU 1.

The M sensing units 400-1 to 400-m sequentially sense the subpixels in the Nth subpixel row in the display panel 110 for each color, That is, the display panel 110 simultaneously senses R subpixels among the subpixels in the Nth subpixel row, then simultaneously senses W subpixels, then simultaneously senses the G subpixels, and then B By sensing the subpixels at the same time, the sensing process for the sensing unit SU 1 is performed.

As described above, when each sensing unit is "the same subpixel row ", and the" sensing process for each line "is performed, there is an advantage that the gate driving is convenient, and the sensing unit is further subdivided, can do.

As described above, assuming that the entire sensing of the display panel 110 is not stopped in the middle, when each sensing unit is a subpixel group of the same color, The total sensing time Tsense required to sense all the subpixels on the display panel is calculated by multiplying the value obtained by multiplying the sensing time Tsp of each subpixel and the number N of subpixel rows by the number of colors C, .

Assuming that the entire sensing of the display panel 110 is not stopped in the middle as described above, when each sensing unit is the same sub-pixel row, all the sub-pixels on the display panel 110 The total sensing time Tsense required for sensing the pixel is obtained by multiplying the value obtained by multiplying the sensing time Tsp and the color number C of each subpixel by the number N of subpixel rows, .

Referring to Equations (1) and (2), if the sensing of the display panel 110 is not halted in the middle even if the type of sensing unit and the sensing processing method are different from each other, And the total sensing time Tsense required to perform the measurement is the same. That is, even if the sensing process is performed in accordance with the type of the sensing unit and the method corresponding thereto, it is possible to take advantage of each of them without affecting the entire sensing range and accuracy.

4, a plurality of sensing units 400-1 to 400-m, ..., and 400-M may be configured such that power is turned off during sequential sensing processing for each sensing unit (Off), the next sensing timing (again when the power is turned on to the sensing mode section), the last sensing unit of the sensing completion sensing unit indicated by each of the at least one flag stored in the memory 420 It is possible to sequentially perform the sensing process from the next sensing unit of the sensor.

According to the above description, when the sensing process is interrupted and restarted for some reason (for example, power-off, etc.) before completing the sensing process of the display panel 110, , The flag can be confirmed and the sensing process can be resumed from the next sensing unit of the sensing completion sensing unit.

Therefore, the sensing process of the display panel 110 can be partially performed. That is, even if the sensing process is not completely completed with respect to the display panel 110 and a problem occurs during the sensing process, the sensing process may be performed on the remaining portion except for the portion completed before the occurrence of the problem. Can be significantly reduced.

8 is a view for explaining a position marking technique of the sensing process of the display device 100 according to the embodiments. 8 shows an example in which each sensing unit is a subpixel group of the same color, and the sensing process is performed for each color.

Referring to FIG. 8, the display device 100 according to the embodiments may provide a location marking technique for sensing the display panel 110.

Referring to FIG. 8, according to the position marking technique of the sensing process, a plurality of sensing units 400-1 to 400-m,..., 400- (SP # 1, SP # 2, SP # 3, and SP # 4) for each sensing unit SU R, SU W, SU G, and SU B (Flag R, Flag W, Flag G, and Flag B) are set as information indicating the sensing completion sensing unit when the processes (SP # 1, SP # 2, SP # 420).

Referring to FIG. 8, a plurality of sensing units 400-1 to 400-m,..., 400-M perform a sensing process on the sensing unit SU R, (Flag R) indicating that the sensing process for R is completed is stored in the memory 420. [ Then, the sensing units 400-1 to 400-m perform a sensing process on the sensing unit SU W and, when the sensing process is completed, And a flag (Flag W) indicating that the process is completed is stored in the memory 420. Then, the sensing units 400-1 to 400-m perform a sensing process on the sensing units SU G, and when they are completed, (Flag G) indicating that the process has been completed is stored in the memory 420. Then, the sensing units 400-1, 400-m, ..., 400-M perform sensing processing on the sensing units SU B, And stores a flag (Flag B) in the memory 420 indicating that the process is completed.

4, the display apparatus 100 includes a plurality of sensing units 400-1, ..., 400-m, ..., 400- The sensing process control signal for controlling the sensing process of the plurality of sensing units 400-1 to 400-m is determined by a plurality of sensing units 400-1 to 400- The control unit 430 outputs the compensation processing control signal to the sensing units 400-1 to 400-m, ..., and 400-M or the compensation processing control signal to control the compensation processing to the compensation unit 410 .

That is, the control unit 430 controls the sensing processing positions and the like of each of the plurality of sensing units 400-1 to 400-m, and performs compensation processing of the compensation unit 410 Timing and the like can be controlled.

The control unit 430 can efficiently control the sensing processing position and the compensation processing timing through the flags in the memory 420. [

If the flags are not stored in the memory 420 or the flags for all sensing units are stored in the memory 420 as a result of the flags in the memory 420 at the next sensing timing, Outputs a sensing process control signal for causing the sensing process to start again from the beginning, that is, to sequentially perform the sensing process from the first sensing unit.

The control unit 430 instructs at least one flag stored in the memory 420 when the flags for the certain sensing units are stored in the memory 420 as a result of the flags in the memory 420 at the next sensing timing It is possible to output a sensing process control signal for sequentially performing the sensing process from the sensing unit next to the sensing unit of the last sensing sensing unit.

FIG. 9 is a diagram illustrating the resumption of the partial sensing process using the position marking technique of the sensing process of the display device 100 according to the embodiments.

Referring to FIG. 9, a plurality of sensing units 400-1 to 400-m,..., 400-M perform a sensing process on the sensing unit SU R, (Flag R) indicating that the sensing process for R is completed is stored in the memory 420. [

Referring to FIG. 9, the plurality of sensing units 400-1 to 400-m, ..., and 400-M perform a sensing process on the sensing unit SU W, (Flag W) indicating that the sensing process for W is completed is stored in the memory 420. [

Referring to FIG. 9, when a plurality of sensing units 400-1 to 400-m, ..., and 400-M are performing a sensing process on the sensing unit SU G, OFF, so that when the entire display panel 110 is not sensed, the power is turned on again, and when the sensing timing is again performed, the display panel 110 is normally sensed again from the beginning.

In this case, both the sensing process performed before the power is turned off and the sensing data according to the sensing process become unnecessary, resulting in considerable time loss and resource loss.

Thus, in this embodiment, when the sensing units 400-1 to 400-m, ..., and 400-M perform the sensing process on the sensing unit SU G, the power is turned off OFF, so that the entire display panel 110 can not be sensed. When the power is turned on again and the sensing timing is restored, the display panel 110 is not sensed again from the beginning, (Flag R, Flag W) stored in the memory 420 and performs the process again from the sensing process for the next sensing unit SU G of the last sensing unit SU W indicated by the flag.

That is, the plurality of sensing units 400-1 to 400-m perform sensing processing on the sensing unit SU G, and sensing processing on the sensing unit SU G (Flag G) indicating that it has been completed is stored in the memory 420.

Then, when the sensing units SU-B are completed by sensing the sensing units SU B, the sensing units SU- And stores a flag (Flag B) indicating that it is completed in the memory 420. [

The control unit 430 can easily and quickly determine the sensing position through the flag check in the memory 420. [

On the other hand, the control unit 430 provides a validity checking technique to check the accuracy of the already obtained sensing data again so as to perform an accurate compensation process.

FIG. 10 is a view for explaining a location marking technique and a validation technique of the sensing process of the display device 100 according to the embodiments, and a sensing process using the same.

10, when the flag for the sensing unit is stored in the memory 420 as a result of the flag check in the memory 420 at the next sensing timing, the control unit 430 controls the flag stored in the memory 420 The sensing data obtained again by the plurality of sensing units 400-1 to 400-M for at least one subpixel or all the subpixels is stored in the memory 420 and stored in the memory 420 for each corresponding sensing unit The validity of the flag set for each sensing unit is determined and the sensing process control signal can be output in accordance with the determination result have.

The control unit 430 determines that the difference value of the two sensing data is within the predetermined sensing error range and determines that the corresponding flag is valid. If the difference value of the two sensing data deviates from the predetermined sensing error range, .

The control unit 430 determines whether or not the sensing data is sensing data that reflects the current state of the display panel 110 even if the sensing process is completed and the flag is set in the sensing unit, To obtain sensing data that reflects well.

Here, in the re-sensing process for flag validity determination, all the sub-pixels included in the sensing unit may be sensed, but for efficiency, the sensing may be performed on only some sub-pixels.

More specifically, when it is determined that the flags stored in the memory 420 are valid as a result of judging the validity of the flags stored in the memory 420, the control unit 430 instructs the flags A sensing process control signal for sequentially performing the sensing process from the next sensing unit of the last sensing unit among the sensing units (sensing process completed) is output.

If at least one of the flags stored in the memory 420 is invalid as a result of judging the "validity" of the flag stored in the memory 420, the control unit 430 performs a sensing process for the sensing unit corresponding to an invalid flag Can be output again.

When the sensing process is resumed in the state where the sensing for the display panel 110 is not completed, even if the flag is set and the sensing unit is stored in the memory 420, the state of the corresponding subpixel (s) The sensing data stored at the set time may be sensed data that is not suitable in the present situation.

Therefore, when the flag is not valid, that is, when the sensing data stored at the time the flag is set is not suitable for the current situation, the sensing process is performed again to obtain the sensing data enabling accurate luminance compensation.

On the other hand, when the sensing of the display panel 110 is completed, that is, the flag is set for all the sensing units and the memory (not shown) is set in accordance with the flag check result in the memory 420 at the compensation timing, 420, it may output a compensating process control signal to the compensating unit 410 to perform compensation processing for all the sensing units.

The control unit 430 can easily confirm whether or not the sensing on the display panel 110 is completely completed by checking the flags in the memory 420 and the compensation processing timing of the compensation unit 410 Can be controlled.

10, when a flag is set for all the sensing units and stored in the memory 420 according to a flag check result in the memory 420 at the compensation timing, (Step S1000). In step S1000, the validity of the flag for each sensing unit is compared with the sensing data already stored in the memory 420 and the sensing data obtained for the at least one subpixel again. It is possible to output a sensing process control signal to the sensing section or output the compensation process control signal to the compensating section 410. [

As described above, the control unit 430 again confirms whether or not each sensing data is suitable for the current situation of the display panel 110, even if it is time to perform compensation processing, that is, even if all the sensing data are obtained By performing the flag validity determination procedure, the sensing data suitable for the current situation can be regained and the accuracy of the compensation process can be improved.

More specifically, when it is determined that the flags for all the sensing units are valid as a result of determining the validity of the flag for each sensing unit, the control unit 430 performs a compensation process control And outputs the signal to the compensation unit 410. [

The control unit 430 determines whether or not the flag (e.g., Flag W) for at least one sensing unit (e.g., SU W) is invalid as shown in FIG. 11 as a result of determining the validity of the flag for each sensing unit (E.g., SP # 2 ') for a sensing unit (e.g., SU W) corresponding to an invalid flag (e.g., Flag W) .

Accordingly, the plurality of sensing units 400-1, ..., 400-M can acquire and update the sensing data for correct compensation to the memory 420. [

The sensing data stored at the time when the display panel 110 is sensed is not suitable for the current situation even when the sensing panel 110 is fully sensed and the compensation process can be performed. It is possible.

Therefore, when the flag is not valid, that is, when the sensing data stored at the time when the flag is set (i.e., at the time when the sensing process was performed) is not suitable for the current situation, the sensing process is performed again, Can be obtained.

Each of the plurality of sensing units 400-1 to 400-m shown in FIG. 4 is connected to the data driving ICs D-IC included in the data driving unit 120, And the compensation unit 410 and the control unit 430 may be included in the timing controller 140. [

According to the embodiments as described above, when the display panel 110 is sequentially sensed for each sensing unit, a flag is set for the sensing unit for which the sensing process is completed, thereby confirming the position where the sensing process is completed So that it is possible to provide an efficient sensing and compensation function.

According to the embodiments, when the sensing process is interrupted before sensing the entire display panel 110, the position where the sensing process is completed is marked so that when the sensing timing comes later, It is possible to perform the sensing process from the position after the completion, and to perform the quick sensing and compensation process.

According to the present embodiments, in the case where the sensing process is interrupted before sensing the entire display panel 110, the position where the sensing process is completed is marked, and when the sensing timing is reached, the marked position is confirmed , It is possible to resume the sensing process from the position where the sensing process is completed, thereby preventing a screen abnormal phenomenon due to the sensing stop, providing an efficient sensing and compensation function, and shortening the sensing time .

In addition, according to the present exemplary embodiments, even if sensing is interrupted before sensing the entire display panel 110, sensing data for at least one subpixel completed before the sensing stop is stored, So that it is possible to provide an efficient sensing and compensating function, prevent a screen abnormal phenomenon due to sensing interruption, and shorten the sensing time as well.

In addition, according to the embodiments, the sensing and compensation efficiency can be enhanced by collecting the subpixels of the same color that can show similar image characteristics and sequentially sensing the subpixel group for each color.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. , Separation, substitution, and alteration of the invention will be apparent to those skilled in the art. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: display device
110: Display panel
120: Data driver
130: Gate driver
140: Timing controller

Claims (14)

A display panel in which a plurality of data lines and a plurality of gate lines are formed, a plurality of subpixels are formed to define a plurality of pixels, and a sensing line corresponding to at least one subpixel column is formed;
A plurality of sensing units for sensing a subpixel included in a subpixel column connected to the sensing lines, each sensing unit sequentially sensing a predetermined sensing unit to output sensing data;
A memory for storing a flag set as information indicating a sensing unit for which the sensing process is completed; And
And a compensation unit for performing data compensation processing based on sensing data for each sensing unit. The method according to claim 1,
The plurality of sensing units include:
If the power is turned off during the sequential execution of the sensing process for each sensing unit,
And sequentially performs the sensing process from the next sensing unit of the last sensing unit among the sensing units indicated by each of the at least one flag stored in the memory at the next sensing timing. The method according to claim 1,
A sensing unit for determining a sensing unit for starting the sensing process of the plurality of sensing units according to a result of the flag check in the memory and outputting a sensing process control signal for controlling the sensing process of the plurality of sensing units, And a control unit for outputting a control signal. The method of claim 3,
Wherein,
At the next sensing timing, as a result of flag check in the memory,
Outputting a sensing processing control signal for performing sensing processing sequentially from the first sensing unit when no flag is stored in the memory or when flags for all sensing units are stored,
A sensing process for sequentially performing the sensing process from the next sensing unit of the last sensing unit among the sensing units indicated by at least one flag stored in the memory when the flag for some sensing unit is stored in the memory And outputs a control signal. The method of claim 3,
Wherein,
When only a flag for a certain sensing unit is stored in the memory as the result of flag checking in the memory at the next sensing timing,
For each sensing unit corresponding to at least one flag stored in the memory,
Comparing the sensed data obtained again for at least one subpixel or all subpixels with the sensing data already stored in the memory to determine the validity of the flag stored in the memory,
And outputs a sensing process control signal in accordance with the determination result. 6. The method of claim 5,
Wherein,
If it is determined that all of the flags stored in the memory are valid, sensing is performed sequentially from the next sensing unit of the last sensing unit among the sensing units indicated by the flag stored in the memory, Outputs a process control signal,
And outputs a sensing process control signal for performing a sensing process on a sensing unit corresponding to an invalid flag when it is determined that at least one of the flags stored in the memory is invalid as a result of the determination Display device. The method of claim 3,
Wherein,
At the compensation timing, in accordance with the flag check result in the memory,
And outputs a compensation process control signal to the compensation unit to perform a compensation process for all the sensing units when a flag is set for each sensing unit and stored in the memory. The method of claim 3,
Wherein,
At the compensation timing, in accordance with the flag check result in the memory,
When a flag is set for each sensing unit and stored in the memory,
Comparing the sensing data obtained for the at least one subpixel with the sensing data already stored in the memory for each sensing unit to determine the validity of the flag for each sensing unit,
And outputs a sensing process control signal to the plurality of sensing units or outputs a compensation process control signal to the compensation unit according to a result of the determination. 9. The method of claim 8,
Wherein,
If it is determined that the flag for all the sensing units is valid, outputs a compensation process control signal for performing compensation process for all the sensing units to the compensation unit,
And outputs a sensing process control signal for performing a sensing process on a sensing unit corresponding to an invalid flag if it is determined that the flag for at least one sensing unit is invalid as a result of the determination Display device. The method according to claim 1,
Wherein each sensing unit is a sub pixel group of the same color. The method according to claim 1,
Wherein each sensing unit is the same sub pixel row. A display panel in which a plurality of data lines and a plurality of gate lines are formed, a plurality of subpixels are formed, and a plurality of sensing lines are formed;
A sensing unit sequentially performing sensing processing for each color subpixel group to output sensing data; And
And a compensating unit for performing compensation processing on data to be supplied to each sub-pixel based on the sensing data. A display panel in which a plurality of data lines and a plurality of gate lines are formed, a plurality of subpixels are formed, and a plurality of sensing lines are formed;
A sensing unit for generating and outputting sensing data based on a voltage sensed for a sensing node of each sub pixel through a plurality of sensing lines; And
And a memory for storing sensing data for at least one subpixel completed before the sensing is stopped even if the sensing of all the subpixels formed on the display panel is not completed. A display panel in which a plurality of data lines and a plurality of gate lines are formed, a plurality of subpixels are formed, and a plurality of sensing lines are formed;
A sensing unit for generating and outputting sensing data based on a voltage sensed for a sensing node of each sub pixel through a plurality of sensing lines; And
And a memory for storing information indicating a position at which the sensing is completed before the sensing is stopped when sensing of all the subpixels formed on the display panel is not completed.

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