KR101183399B1 - Display and Driving Method thereof - Google Patents

Abstract

The present invention relates to a display device and a method of driving the same to minimize motion blurring and luminance deterioration in a moving image.

A display device according to the present invention includes a display panel; A light source for irradiating light to the display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; The predetermined insertion data set by the input data and other gradation values are arranged within one field period, and the gradation value of the insertion data is controlled differently according to the ambient illuminance of the display panel, and according to the ambient illuminance A controller for varying luminance; And a driving unit for supplying data from the control unit to the display panel.

Description

Display device and driving method thereof

1 is a characteristic diagram showing light emission characteristics of a cathode ray tube;

2 is a characteristic diagram showing light emission characteristics of a liquid crystal display device;

3 is a diagram illustrating a perceptual image of a cathode ray tube felt by a viewer;

4 is a diagram illustrating a perceptual image of a liquid crystal display that a viewer feels.

5 is a diagram illustrating data alignment in a normal state.

Fig. 6 is a diagram showing a data arrangement in which black data is inserted into the entire gradation region.

Fig. 7 is a graph comparing the luminance in the normal state with the luminance in the black data insertion.

8 is a block diagram illustrating a display device according to the present invention.

9 is a detailed block diagram of the inverter of FIG.

10 is a graph showing a difference in luminance between a data alignment method and a data alignment in a normal state according to the present invention;

11 illustrates an example of data alignment.

12 is a waveform diagram of a luminance variable signal and an inverter output signal according to the present invention;

         Description of the Related Art

80: ambient light detection unit 81: timing controller

82A: Data Aligner 82B: Signal Generator

83: data driver 84: gate driver

85: data line 86: scan line

87: display panel 88: inverter

89: backlight unit 110: PWM control unit

120: power supply unit 130: switching unit

140: transformer 150: feedback circuit

160: light source

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device and a driving method thereof, and more particularly to a display device and a driving method thereof for minimizing motion blurring and luminance reduction in a moving image.

In a hold type display device such as a liquid crystal display device or an organic light emitting diode device (OLED), a blurring phenomenon in which a screen is not clear and blurry appears in a moving image due to retention characteristics. This will be described with reference to FIG. 1 and FIG. 2, which show data characteristics of a cathode ray tube (hereinafter referred to as “CRT”) and a liquid crystal display.

As shown in FIG. 1, the CRT displays data by emitting phosphors only during an initial very short time of one field period, and displays an impulse-type in which most of one field period is left at a pause interval. Device. On the other hand, in the liquid crystal display, as shown in FIG. 2, data is supplied to the liquid crystal during the scanning period in which the scan high voltage Vgh is supplied, and data supplied to the liquid crystal is maintained in the non-scanning period, which is most of one field period.

3 and 4, the perceived image of the viewer in the video is clearly displayed in the CRT. On the other hand, in the liquid crystal display device, since the temporal frequency characteristic of the light for displaying the moving image is low and the spatial frequency characteristic is low, the blurring phenomenon of the moving image is caused. Particularly, even if the response time of the liquid crystal is several msec or less, the characteristics of the moving picture are lower than those of the CRT, which is an impulse type, due to the characteristics of the LCD. This difference in perceptual image is due to the integral effect of the image which is temporarily persisted in the eye following the movement. Therefore, even if the response speed of the liquid crystal display is fast, the viewer sees a blurred screen due to a mismatch between eye movement and a static image of each frame.

In order to alleviate the motion blur of the liquid crystal display, studies are being actively conducted to drive the liquid crystal display in an impulse type. There are many such impulse driving methods, which are largely classified into a data alignment method and a backlight control method.

Unlike the normal method in which one data is supplied for one vertical period (1V) as shown in FIG. 5, the data sorting method uses a similar impulse type by inserting black data between the data D1 to D5 as shown in FIG. 6. By driving the liquid crystal display, the motion blur phenomenon is alleviated. In addition, the backlight control method alleviates the motion blur phenomenon by dividing the backlight disposed on the rear surface of the liquid crystal display panel into a plurality of light emitting regions and sequentially turning on and off lamps in each light emitting region by a control circuit.

By the way. In the conventional method of mitigating motion blur by a similar impulse method, the transmittance of the liquid crystal display is lowered due to the black data inserted between the respective data and the backlight control due to the fixed duty ratio. As can be seen, the luminance A is significantly lowered. The decrease in luminance due to the similar impulse method does not actively cope with the change in illuminance and chromaticity of the external incident light caused by the change of the external environment, leading to a problem in that the optimum image quality is not reproduced.

Accordingly, an object of the present invention is to provide a display device and a method of driving the same, which minimize motion blurring and luminance deterioration by a data alignment method and a backlight driving method which are controlled according to the illuminance of external light when a moving image is implemented. Is in.

In order to achieve the above object, a display device according to the present invention includes a display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; A control unit for arranging predetermined insertion data preset with input data and other gradation values within one field period, and controlling gradation values of the insertion data differently according to the ambient illuminance of the display panel; And a driving unit for supplying data from the control unit to the display panel.

A display device according to the present invention includes a display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; A control unit which aligns the input data within one field period and determines whether to overlap the input data according to the ambient illuminance of the display panel; And a driving unit for supplying data from the control unit to the display panel.

A display device according to the present invention includes a display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; The predetermined insertion data is arranged with input data and other gradation values within one field period, and the gradation value of the insertion data is controlled differently according to the ambient illuminance of the display panel, and the input data is arranged within the field period. A control unit for overlapping alignment and determining whether to overlap the alignment according to the ambient illuminance of the display panel; And a driving unit for supplying data from the control unit to the display panel.

The driver may include a data driver configured to convert data arranged by the controller into an analog data voltage and supply the data lines to the data lines of the display panel; A scan driver for sequentially supplying scan pulses to scan lines crossing the data lines; And a timing controller for supplying the input data to the controller, supplying the data arranged by the controller to the data driver, and controlling the data driver and the scan driver.

The control unit may be embedded in the timing controller.

The ambient light sensor is characterized in that the photosensitive sensor.

A display device according to the present invention includes a display panel; A light source for irradiating light to the display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; And a controller for varying the luminance of the light source according to the ambient illuminance.

A display device according to the present invention includes a display panel; A light source for irradiating light to the display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; The predetermined insertion data set by the input data and other gradation values are arranged within one field period, and the gradation value of the insertion data is controlled differently according to the ambient illuminance of the display panel, and according to the ambient illuminance A controller for varying luminance; And a driving unit for supplying data from the control unit to the display panel.

A display device according to the present invention includes a display panel; A light source for irradiating light to the display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; A control unit arranged to overlap input data within one field period, and determine whether to overlap the input data according to the ambient illuminance of the display panel, and to vary the luminance of the light source according to the ambient illuminance; And a driving unit for supplying data from the control unit to the display panel.

A display device according to the present invention includes a display panel; A light source for irradiating light to the display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; The predetermined insertion data is arranged in advance in one field period with the input data and other gradation values, and the gradation value of the insertion data is controlled differently according to the ambient illumination of the display panel. A control unit for overlapping alignment and determining whether to overlap the alignment according to the ambient illuminance of the display panel, and varying the luminance of the light source according to the ambient illuminance; And a driving unit for supplying data from the control unit to the display panel.

The controller is characterized in that for generating a variable brightness signal to vary the brightness of the light source in accordance with the ambient illuminance and supplying it to the light source driver.

The light source driving unit includes a PWM control unit for controlling the lighting period of the light source according to the brightness variable signal; A switching unit which is switched under the control of the PWM control unit and converts a DC signal supplied from the outside into an AC signal; And a transformer for boosting the AC signal generated from the switching unit and supplying the AC signal to the light source.

The PWM controller may control the duty ratio of the output signal of the transformer in accordance with the luminance variable signal.

The duty ratio of the transformer output signal is increased in proportion to the sensed ambient illuminance.

In addition, the driving method of the display device according to the present invention includes the steps of sensing the ambient illumination of the display panel; Arranging predetermined insertion data preset with input data and other gradation values within one field period, and controlling the gradation value of the insertion data according to the ambient illuminance of the display panel; And supplying the sorted data to the display panel.

A driving method of a display device according to the present invention includes the steps of detecting the ambient illuminance of the display panel; Overlapping sorting of input data within a field period and determining whether to sort the duplicated data according to the ambient illuminance of the display panel; And supplying the sorted data to the display panel.

According to an aspect of the present invention, there is provided a method of driving a display device, the method comprising: sensing ambient illuminance of a display panel; The predetermined insertion data is arranged with input data and other gradation values within one field period, and the gradation value of the insertion data is controlled differently according to the ambient illuminance of the display panel, and the input data is arranged within the field period. Determining whether to align the overlap according to the ambient illuminance of the display panel; And supplying the sorted data to the display panel.

According to an aspect of the present invention, there is provided a method of driving a display device, the method comprising: sensing ambient illuminance of a display panel; And varying the luminance of the light source according to the ambient illuminance.

According to an aspect of the present invention, there is provided a method of driving a display device, the method comprising: sensing ambient illuminance of a display panel; The predetermined insertion data is arranged with input data and other gradation values within one field period, and the gradation value of the insertion data is controlled differently according to the ambient illuminance of the display panel and the light source according to the ambient illuminance. Varying the luminance of the light; And supplying the sorted data to the display panel.

According to an aspect of the present invention, there is provided a method of driving a display device, the method comprising: sensing ambient illuminance of a display panel; Repeatedly arranging input data within one field period, and determining whether to overlap the input data according to the ambient illumination of the display panel, and varying the brightness of the light source according to the ambient illumination; And supplying the sorted data to the display panel.

According to an aspect of the present invention, there is provided a method of driving a display device, the method comprising: sensing ambient illuminance of a display panel; Arrange predetermined predetermined data with input data and other gradation values within one field period, but control the gradation value of the insertion data differently according to the ambient illuminance of the display panel, and duplicately arrange the input data within one field period. Determining whether the overlapping alignment is performed according to the ambient illumination of the display panel, and varying the luminance of the light source according to the ambient illumination; And supplying the sorted data to the display panel.

The varying luminance may include generating a luminance variable signal according to the ambient illuminance; And controlling the lighting period of the light source to the luminance variable signal.

Other objects and features of the present invention in addition to the above object will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 8 to 12.

8 is a block diagram illustrating a display device according to the present invention.

Referring to FIG. 8, in the display device according to the present invention, the display panel 87 in which the data line 85 and the scan line 86 intersect and a plurality of pixels are formed, and the peripheral illumination of the display panel 87 is detected. To adjust the luminance of the light source according to the ambient illuminance, an ambient illuminance detecting unit 80, a data aligning unit 82A for arranging input data and predetermined predetermined insertion data within one field period according to the ambient illuminance, A signal generator 82B for generating the luminance variable signal LVS, a data driver 83 for supplying the aligned data to the data line 85 of the display panel 87, and a scan of the display panel 87 The scan driver 84 for supplying the scan pulse to the line 86, the data driver 83 and the scan driver 84 are controlled, and the luminance variable signal LVS from the signal generator 82B is converted to the inverter 88. ) And supplies the data RGB (B, M) from the data alignment unit 82A to the data driver 8. 3) included in the backlight unit 89 according to the timing controller 81 for supplying the light, the backlight unit 89 for irradiating light to the display panel, and the luminance variable signal LVS supplied from the timing controller 81. Inverter 88 for driving the light source is provided.

The display panel 87 is formed such that the data lines 85 and the scan lines 86 are perpendicular to each other, and pixels are arranged in a matrix type. The display panel 87 is implemented as a display panel of a hold type display device such as an LCD panel or an OLED panel.

The ambient light sensor 80 detects the ambient light of the display panel and is implemented by a known light sensor. The ambient light sensor 80 converts the magnitude of the detected light amount into a digital signal and supplies it to the timing controller 81.

The timing controller 81 generates a control signal for controlling the data alignment unit 82A and a control signal for controlling the signal generator 82B according to the supplied digital illuminance signal. The timing controller 81 controls the scan control signal SDC and the data driver 83 for controlling the scan driver 84 using the vertical / horizontal synchronization signals V and H and the pixel clock CLK. Generate a data control signal DDC. In addition, the timing controller 81 samples the digital video data RGB in accordance with the pixel clock CLK and supplies the data RGB to the data alignment unit 82A.

The data alignment unit 82A analyzes the digital illuminance signal from the timing controller 81 and accordingly duplicates the input data RGB within one field (frame) period, or input data within one field (frame) period. The predetermined insertion data RGB (B, M) set in advance by (RGB) and other gradation values are aligned. For example, when the digital illuminance signal value is less than the first reference value, the data alignment unit 82A inserts the black data B to align the input data RGB with the black data B within one field period. When the digital illuminance signal value is greater than or equal to the first reference value and less than the second reference value, the halftone data M lower than the input data RGB and higher than the black data B is inserted to insert the input data RGB within one field period. And halftone data (M) are sorted. The data aligning unit 82A overlaps the input data RGB within one field period when the digital illuminance signal value is equal to or greater than the second reference value. Herein, the first and second reference values are preset values and are larger than the first reference value. On the other hand, unlike the case where two reference values are set as in the above-described example, when the digital illuminance signal value is less than the reference value, when the digital illuminance signal value is less than the reference value, black data (B) is inserted to input data RGB and black within one field period. The data B is aligned, and when the digital illuminance signal value is equal to or greater than the reference value, the input data RGB is repeatedly aligned within one field period. In addition, the number of reference values may be set differently, and as the number of reference values increases, gradation values of data to be inserted correspondingly are subdivided and inserted in proportion to the digital illuminance signal value. Hereinafter, for convenience of description, a case in which two reference values (a first reference value and a second reference value) will be described as an example.

The data alignment unit 82A may be embedded in the timing controller 81.

The data driver 83 registers the shift register, a register for temporarily storing the data (RGB (BDI)) from the timing controller 81, and the data (RGB (BDI)) for each line in response to a clock signal from the shift register. Latch for storing and outputting one line of stored data (RGB (BDI)) at the same time, and digital for selecting analog positive / negative gamma compensation voltage corresponding to the data (RGB (BDI)) value from the latch. And an analog converter, a multiplexer for selecting the data line 85 to which the positive / negative gamma compensation voltage is supplied, and an output buffer connected between the multiplexer and the data line. The data driver 83 receives data RGB (BDI) and supplies the data RGB (BDI) to the data lines 85 of the display panel 87 under the control of the timing controller 81.

On the other hand, the gamma voltage supplied to the digital-to-analog converter of the data driver 83 is for each gray level in the state where the black data B is inserted between the input data RGB when the digital illuminance signal value is less than the first reference value. When the digital illuminance signal value is greater than or equal to the first reference value and less than the second reference value, the digital illuminance signal value is set for each gray level with the intermediate grayscale data M inserted between the input data RGB. If the value is greater than or equal to two reference values, the input data RGB is set for each gray level while the input data RGB is aligned.

The scan driver 84 sequentially generates scan pulses in response to the scan control signal GDC from the timing controller 81.

The signal generator 82B generates and supplies a luminance variable signal LVS indicating the lighting period of the light source to vary the brightness of the light source according to the ambient illuminance and supplies it to the inverter 88. The duty ratio of the luminance variable signal LVS generated by the signal generator 82B increases in proportion to the magnitude of the ambient illuminance value. The signal generator 82B may be built in the timing controller 81.

The inverter 88 controls the lighting period of the light source included in the backlight unit 89 according to the luminance variable signal LVS supplied from the signal generator 82B to change the brightness of the light source according to the ambient illumination. This will be described in detail with reference to FIG. 9.

9 is a block diagram showing an inverter according to the present invention.

9, the inverter 88 according to the present invention is a PWM (Pulse Width Modulation) control unit 110 for controlling the lighting period of the light source 160 in accordance with the luminance variable signal (LVS) of the signal generation unit, PWM The switching unit 130 is switched according to the control signal of the controller 110 to convert the DC signal supplied from the power supply unit 120 into an AC signal, and the AC signal generated from the switching unit 130 is boosted to drive the light source. A feedback circuit for inspecting the transformer unit 140 and the tube current supplied from the transformer unit 140 to the light source 160 and supplying the feedback (F / B) signal to the PWM controller 110. 150.

The PWM controller 110 controls the duty ratio of the output AC signal supplied to the light source 160 according to the luminance variable signal LVS that varies according to the ambient illuminance. To this end, the PWM controller 110 supplies the switching signal to the switching unit 130 during the on-time of the luminance variable signal LVS.

The switching unit 130 is switched in response to the switching signal of the PWM control unit 110 to convert the DC signal supplied from the power supply unit 120 into an AC signal.

The transformer 140 boosts an AC signal generated from the switching unit 130 to drive a light source. The transformer 140 may be implemented as a transformer in which the primary winding is connected to the switching unit 130 and the secondary winding is commonly connected to one end of the light source 160 and the feedback circuit 150. The AC signal supplied from the switching unit 130 by the winding ratio is boosted by an AC signal of high pressure and induced.

The feedback circuit 150 generates a feedback (F / B) signal by detecting a current transmitted to the light source 160 by an AC signal induced in the secondary winding of the transformer 140. The feedback circuit 150 may be located at an output end of the light source 160, and when located at the output end, the feedback circuit 150 may detect an output value output from the light source 160. The generated feedback (F / B) signal is supplied to the PWM control unit 110 to enable the PWM control unit 110 to control the switching of the switching unit 130.

FIG. 10 shows a difference in luminance between the data sorting method and the normal data sorting according to the present invention, and FIG. 11 shows an example of the data sorting according to the present invention.

10 and 11, the data alignment unit 82A analyzes the digital illuminance signal from the timing controller 81 and accordingly inputs the input data RGB within one field period (1 vertical period (1V)). Overwrite or input data RGB and predetermined insertion data RGB (B, M) are arranged in different field periods within one field period.

For example, when the digital illuminance signal value is less than the first predetermined reference value S1, the data alignment unit 82A inserts the black data B to insert the input data RGB and the black data B within one field period. ), And when the digital illuminance signal value is equal to or greater than the first reference value S1 and less than the second reference value S2, the halftone data M lower than the input data RGB and higher than the black data B is obtained. Insert to align the input data RGB and the halftone data M within one field period. The data aligning unit 82A overlaps the input data RGB within one field period when the digital illuminance signal value is greater than or equal to the preset second reference value S2.

The area 1 is an area in which the digital illuminance signal value falls below the preset first reference value S1, and the peripheral illuminance of the display panel is lower than that in the areas 2 and 3. Therefore, when the external illuminance corresponds to region 1, the motion blurring phenomenon is remarkable when the video is implemented, and black data B is inserted to alleviate this. Even when black data B is inserted, the visibility is not greatly reduced because the ambient illuminance is low. The area 3 is an area in which the digital illuminance signal value exceeds the preset second reference value S2, and the peripheral illuminance of the display panel is higher than that in the areas 1 and 2. In the case where the external illuminance corresponds to the area 3, when the black data B or the half-tone data M is inserted to alleviate the motion blur, the visibility is greatly reduced, thereby inserting the same data as the input data RGB. In addition, the area 2 is an area in which the digital illuminance signal value exceeds the preset first reference value S1 and falls short of the second reference value S2. The peripheral illumination of the display panel is higher than the area 1 and lower than the area 3. Therefore, when the external illuminance corresponds to the area 2, the halftone data M is inserted so that the visibility can be guaranteed while alleviating the motion blurring to some extent.

In FIG. 10, "CBDI" is a luminance of data alignment in which any one of black data B, half-tone data M, and the same input data RGB is inserted according to the ambient illuminance of the display panel. Luminance reduction is minimized compared to normal data alignment such as.

In FIG. 11, "D2" is data corresponding to the area 3, "D3 and D4" is data corresponding to the area 2, and "D1 and D5" are data corresponding to the area 1. In addition, "B1, B5" is black data and "M3, M4" is halftone data.

12 is a waveform diagram of a luminance variable signal and an inverter output signal according to ambient illuminance.

Referring to FIG. 12, the signal generator 82B generates and supplies the brightness variable signals LVS1 and LVS2 indicating the lighting period of the light source to vary the brightness of the light source according to the ambient illumination, and supplies the same to the inverter 88. The luminance variable signal may be generated in plural according to the ambient illuminance value, wherein the duty ratio of the luminance variable signal increases in proportion to the magnitude of the ambient illuminance value. Here, for convenience of explanation, the first luminance variable signal LVS1 is generated when the ambient illuminance value is less than the preset reference value, and the second luminance variable signal LVS1 is generated when the ambient illuminance value exceeds the preset reference value. The case where it is generated is demonstrated as an example. The duty ratio of the first luminance variable signal LVS1 is greater than the duty ratio of the second luminance variable signal LVS2.

The inverter 88 controls the lighting period of the light source included in the backlight unit 89 according to the luminance variable signals LVS1 and LVS2 supplied from the signal generator 82B to vary the luminance of the light source according to the ambient illumination. That is, when the luminance variable signals LVS1 and LVS2 are supplied to the inverter, a switching operation is performed during the on-time Ton periods of the luminance variable signals LVS1 and LVS2 by the switching elements of the inverter, whereby a DC signal supplied from the power supply unit is supplied. It is converted into an AC signal. On the other hand, during the off-time Toff period of the luminance variable signals LVS1 and LVS2, the switching operation is interrupted so that the DC signal supplied from the power supply unit is not converted into an AC signal. Since the duty ratio of the first luminance variable signal LVS1 is greater than the duty ratio of the second luminance variable signal LVS2, the on-time period Ton of the first luminance variable signal LVS1 is the second luminance variable signal LVS2. ) Is longer than the on-time period Ton. Therefore, the duty ratio of the inverter output signal supplied to the light source is larger when the first luminance variable signal LVS1 is supplied, which is relatively high in ambient illumination, so that the luminance of the light source is supplied by the second luminance variable signal LVS2. It will be increased relatively.

As a result, the display device and the driving method thereof according to the present invention can minimize the motion blur and increase the visibility by controlling the gradation value of the data to be inserted according to the ambient illuminance or controlling the duty ratio of the luminance variable signal. do.

As described above, the display device and the driving method thereof according to the present invention insert a low gray scale data when the ambient light is low and insert a high gray data proportionally when the ambient light is high. Motion blurring and luminance deterioration can be minimized.

In addition, the display device and the driving method thereof according to the present invention can minimize the motion blur phenomenon and the brightness reduction in the hold type display device by varying the brightness of the light source by controlling the duty ratio of the variable brightness signal according to the ambient illumination.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

Claims (26)

A display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; A control unit for arranging predetermined insertion data preset with input data and other gradation values within one field period, and controlling gradation values of the insertion data differently according to the ambient illuminance of the display panel; And a driving unit for supplying data from the control unit to the display panel. A display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; A control unit which aligns the input data within one field period and determines whether to overlap the input data according to the ambient illuminance of the display panel; And a driving unit for supplying data from the control unit to the display panel. A display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; The predetermined insertion data is arranged with input data and other gradation values within one field period, and the gradation value of the insertion data is controlled differently according to the ambient illuminance of the display panel. A control unit for overlapping alignment and determining whether to overlap the alignment according to the ambient illuminance of the display panel; And a driving unit for supplying data from the control unit to the display panel. 4. The method according to any one of claims 1 to 3, The driving unit includes: A data driver converting the data arranged by the controller into an analog data voltage and supplying the data to the data lines of the display panel; A scan driver for sequentially supplying scan pulses to scan lines crossing the data lines; And a timing controller for supplying the input data to the controller, supplying the data arranged by the controller to the data driver, and controlling the data driver and the scan driver. The method of claim 4, wherein And the control unit is built in the timing controller. 4. The method according to any one of claims 1 to 3, And the ambient light sensor is a photosensitive sensor. delete A display panel; A light source for irradiating light to the display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; The predetermined insertion data set by the input data and other gradation values are arranged within one field period, and the gradation value of the insertion data is controlled differently according to the ambient illuminance of the display panel, and according to the ambient illuminance A controller for varying luminance; And a driving unit for supplying data from the control unit to the display panel. A display panel; A light source for irradiating light to the display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; A control unit arranged to overlap input data within one field period, and determine whether to overlap the input data according to the ambient illuminance of the display panel, and to vary the luminance of the light source according to the ambient illuminance; And a driving unit for supplying data from the control unit to the display panel. A display panel; A light source for irradiating light to the display panel; An ambient illuminance detector for detecting an ambient illuminance of the display panel; The predetermined insertion data is arranged with input data and other gradation values within one field period, and the gradation value of the insertion data is controlled differently according to the ambient illuminance of the display panel, and the input data is arranged within the field period. A control unit for overlapping alignment and determining whether to overlap the alignment according to the ambient illuminance of the display panel, and varying the luminance of the light source according to the ambient illuminance; And a driving unit for supplying data from the control unit to the display panel. The method according to any one of claims 7 to 10, The control unit, And a luminance variable signal is generated and supplied to the light source driver in order to vary the luminance of the light source according to the ambient illuminance. The method of claim 11, wherein The light source driving unit, A PWM controller which controls a lighting period of the light source according to the luminance variable signal; A switching unit which is switched under the control of the PWM control unit and converts a DC signal supplied from the outside into an AC signal; And a transformer for boosting the AC signal generated by the switching unit and supplying the AC signal to the light source. 13. The method of claim 12, The PWM control unit, And a duty ratio of an output signal of the transformer in accordance with the luminance variable signal. The method of claim 13, The duty ratio of the transformer output signal is And the display device increases in proportion to the sensed ambient illuminance. The method according to any one of claims 7 to 10, The driving unit includes: A data driver converting the data arranged by the controller into an analog data voltage and supplying the data to the data lines of the display panel; A scan driver for sequentially supplying scan pulses to scan lines crossing the data lines; And a timing controller for supplying the input data to the controller, supplying the data arranged by the controller to the data driver, and controlling the data driver and the scan driver. 16. The method of claim 15, And the control unit is built in the timing controller. The method according to any one of claims 7 to 10, And the ambient light sensor is a photosensitive sensor. Sensing ambient illuminance of the display panel; Arranging predetermined insertion data preset with input data and other gradation values within one field period, and controlling the gradation value of the insertion data according to the ambient illuminance of the display panel; And supplying the sorted data to a display panel. Sensing ambient illuminance of the display panel; Overlapping sorting of input data within a field period and determining whether to sort the duplicated data according to the ambient illuminance of the display panel; And supplying the sorted data to a display panel. Sensing ambient illuminance of the display panel; The predetermined insertion data is arranged with input data and other gradation values within one field period, and the gradation value of the insertion data is controlled differently according to the ambient illuminance of the display panel, and the input data is arranged within the field period. Determining whether to align the overlap according to the ambient illuminance of the display panel; And supplying the sorted data to a display panel. delete Sensing ambient illuminance of the display panel; The predetermined insertion data is arranged with input data and other gradation values within one field period, and the gradation value of the insertion data is controlled differently according to the ambient illuminance of the display panel, and the Varying the brightness; And supplying the sorted data to a display panel. Sensing ambient illuminance of the display panel; Repeatedly arranging input data within a field period, and determining whether to overlap the input data according to the ambient illuminance of the display panel, and varying the luminance of the light source according to the ambient illuminance; And supplying the sorted data to a display panel. Sensing ambient illuminance of the display panel; Arrange predetermined predetermined data with input data and other gradation values within one field period, but control the gradation value of the insertion data differently according to the ambient illuminance of the display panel, and duplicately arrange the input data within one field period. Determining whether or not the redundancy is aligned according to the ambient illuminance of the display panel, and changing the luminance of the light source according to the ambient illuminance; And supplying the sorted data to a display panel. The method according to any one of claims 21 to 24, The step of varying the brightness, Generating a variable luminance signal according to the ambient illuminance; And controlling the lighting period of the light source according to the luminance variable signal. 26. The method of claim 25, The lighting period of the light source is And a proportional increase in proportion to the sensed ambient illuminance.

Images