KR101022100B1 - Apparatus and method for driving flat display panel - Google Patents

Abstract

The present invention relates to an apparatus and method for driving a flat panel display panel which can reduce power consumption by inputting data corresponding to two scan lines in one data pulse. The present invention relates to an image processed by receiving a predetermined signal including an image signal. A control unit for outputting data on a signal and a predetermined control signal; A first memory unit for storing image data of odd lines among the data of the image signals output from the controller and outputting image data of one line; A second memory unit configured to store image data for even lines among the data for image signals output from the controller and to output image data for one line; An adder configured to add and output respective image data output from the first memory unit and the second memory unit; A data driver for outputting a pulse width modulated data pulse by pulse width modulating the predetermined data output from the adder according to a predetermined control signal output from the controller; A scan driver to output a scan pulse based on a predetermined control signal output from the controller; And a panel configured to receive a data pulse output from the data driver and a scan pulse output from the scan driver to display an image signal.

Description

Flat panel display panel driving apparatus and method {APPARATUS AND METHOD FOR DRIVING FLAT DISPLAY PANEL}

1 is a data pulse and scan pulse waveform diagram for driving a conventional flat panel display panel;

Fig. 2 is a block diagram showing the construction of the present invention flat panel display panel driving apparatus.

3 is a data pulse and scan pulse waveform diagram for driving a flat panel display panel according to the present invention;

Fig. 4 is a block diagram showing yet another configuration of the flat panel display panel driving apparatus of the present invention.

5 is another data pulse and scan pulse waveform diagram for driving a flat panel display panel according to the present invention;

DESCRIPTION OF REFERENCE NUMERALS

10: control unit 20: first memory unit

30: second memory unit 40: addition unit

50: data driver 60: scan driver

70 panel 80 pulse width adjustment section

The present invention relates to a flat panel display panel driving apparatus and method, and more particularly, to a flat panel display panel driving apparatus and method that can reduce the power consumption by inputting data corresponding to two scan lines in a single data pulse.

 With the rapid development of information and communication technology and the demand for the visualization of diversified information, the demand for electronic displays is increasing and the required display forms are also diversified. For example, in an environment where mobility is emphasized such as a portable information device, a display having a small weight, volume, and power consumption is required, and when used as an information transmission medium for the public, display characteristics of a large viewing angle are required.

In addition, in order to satisfy such demands, electronic displays require conditions such as large size, low cost, high performance, high definition, thinness, and light weight, and thus, light and thin that can replace the existing CRT to satisfy these requirements. There is an urgent need for the development of flat panel display devices.

1 illustrates a scan pulse and a data pulse waveform for driving a flat panel display panel. In general, there are scan pulses Scan1 to Scan4 applied to each scan line and respective data pulses synchronized with each scan pulse. It can be seen that the data pulse is driven by the pulse width modulation (PWM) method. That is, data pulses having data values of 64, 32, 32, and 96 are synchronized with each scan pulse to display corresponding data on the screen. As shown in FIG. Since data pulses having rising and falling (rising & falling) are applied, data for each scan line must be turned on and off, and the driving frequency is increased accordingly. When the driving frequency is increased, power consumption is increased by the expression P = C × V ² × F. Where P is power, C is capacitance, V is driving voltage, and F is driving frequency.

Therefore, the higher the driving frequency, the higher the power consumption. In addition, the conventional driving method can be driven by increasing the driving frequency during high resolution driving, but the noise and power consumption caused by the high frequency driving remain a big problem.

As described above, in the conventional flat panel display panel driving method, since the data for each scan line needs to be turned on and off in order to apply a data pulse corresponding to the scan line for each scan line, the driving frequency becomes high, thereby increasing power consumption. There was a problem.

Accordingly, the present invention in view of such a problem provides a flat panel display panel driving apparatus and method that can reduce power consumption by inputting data corresponding to two scan lines as one data pulse to reduce the driving frequency of the data electrode. The purpose is.

In addition, an object of the present invention is to provide a flat panel display panel driving apparatus and method that can reduce switching noise and power consumption when driving a high resolution by reducing the driving frequency of the data electrode.

According to an aspect of the present invention, there is provided a flat panel display panel driving apparatus including: a controller configured to receive a predetermined signal including a video signal and output data and a predetermined control signal for a predetermined video signal; A first memory unit for storing image data of odd lines among the data of the image signals output from the controller and outputting image data of one line; A second memory unit configured to store image data for even lines among the data for image signals output from the controller and to output image data for one line; An adder configured to add and output respective image data output from the first memory unit and the second memory unit; A data driver for outputting a pulse width modulated data pulse by pulse width modulating the predetermined data output from the adder according to a predetermined control signal output from the controller; A scan driver to output a scan pulse based on a predetermined control signal output from the controller; And a panel configured to receive a data pulse output from the data driver and a scan pulse output from the scan driver to display an image signal.

The apparatus may further include a pulse width adjusting unit configured to output, to the adder, predetermined data regarding a time interval between the scan pulse output from the scan driver and the next scan pulse by the predetermined control signal output from the controller. It is characterized by the configuration.                     

According to an aspect of the present invention, there is provided a method of driving a flat panel display panel, comprising: summing image data of two consecutive scan lines; Sequentially applying scan pulses to the two consecutive scan lines; And applying a pulse width modulated data pulse of the summed image data.

In addition, if a predetermined time interval exists between the applied two scan pulses, the data for the time interval is summed with the image data for the two scan lines, and the pulse width modulated data pulse of the summed data is applied. It features.

In addition, the consecutive two scan pulses are characterized by overlapping the data pulse and the image data for the corresponding scan line.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a flat panel display panel driving apparatus and method of the present invention having the above characteristics will be described with reference to the accompanying drawings.

2 is a block diagram showing an embodiment of a flat panel display panel driving apparatus of the present invention. As shown in the drawing, a controller 10 for receiving a predetermined signal IN including an external input signal, for example, a video signal, and outputting data and a predetermined control signal for a predetermined video signal; First memory unit 20 for storing the image data for the odd line of the data for the image signal output from the control unit 10, and the image for the even line of the data for the image signal output from the controller 10 A second memory unit 30 for storing data, an adder 40 for adding and outputting data for each scan line stored in the first memory unit 20 and the second memory unit 30; A data driver 50 for outputting data for two scan lines output from the adder 40 by pulse width modulation (PWM) data by a predetermined control signal output from the controller 10; Predetermined control output from the control unit 10 Receiving a call will be made up of the scan driver 60 and the panel 70 for receiving the data pulse and the scan pulse display the image signal for outputting a scan pulse.

Then, when the operation of the driving apparatus according to the present invention having the configuration described above is described, first, when the external input signal IN is input, the controller 10 processes the video signal included in the input signal by predetermined processing. Image data corresponding to odd-numbered scan lines is stored in the first memory unit 20, and image data corresponding to even-numbered scan lines are stored in the second memory unit 30. In addition, a predetermined control signal according to the input image signal is output to the data driver 50 and the scan driver 60.

The adder 40 adds and outputs image data corresponding to odd-numbered scan lines stored in the first memory unit 20 and image data corresponding to even-numbered scan lines stored in the second memory unit 30.

The data driver 50 controls the data pulses pulse-modulated (PWM) by the predetermined control signal outputted from the controller 10 to the data for the two scan lines output from the adder 40. The scan driver 60 also outputs a scan pulse to the panel 70 according to a predetermined control signal output from the controller 10.

The driving device of the present invention having the above operation will be described below with reference to FIG. 3. For example, the image data corresponding to the first and third scan lines Scan1 and Scan3 stored in the first memory unit 20 are 64 and 32 and the second and fourth scan lines stored in the second memory unit 30. If the image data corresponding to (Scan2, Scan4) is 32, 96, the adder 40 outputs 96, which is the sum of the image data for the first and second scan lines Scan1, Scan2.

The scan driver 60 sequentially outputs scan pulses to the first scan line and the second scan line Scan1 and Scan2 according to the control signal of the controller 10, and the data driver 50 transmits the pulse widths for the 96. The modulated data pulses are output to the panel 70. In this case, the time point at which the data pulse is output to the panel 70 is determined by the controller 10, and the time point depends on the data for the odd scan line. In addition, the scan pulse of each scan line and the data corresponding to the scan line overlap with the data pulse to display image data corresponding to the scan line on the panel 70.

Then, image data for the third scan line and the fourth scan line Scan3 and Scan4 are also displayed through the above process. That is, the third scan line and the fourth scan line by the pulse width modulated data pulse of data 128, which is the sum of data 32 for the third scan line and data 96 for the fourth scan line, and scan pulses applied to each scan line. Image data for is displayed.

4 is a block diagram illustrating another exemplary configuration of a flat panel display panel driving apparatus according to the present invention, which may be applied when a predetermined time interval exists in a scan pulse applied to a scan line and a next scan line. 2 illustrates a pulse width adjusting unit 80 for applying a data pulse corresponding to a time interval existing between scan pulses to the data pulse. The pulse width adjusting unit 80 outputs a data value of a time interval existing between scan pulses by the control signal output from the control unit 10 to the adder 40. For example, if the time interval between scan pulses is a time corresponding to data 10, the data 10 is output to the adder 40.

Then, the adder 40 may perform image data on odd-numbered scan lines stored in the first memory unit 20, data output from the pulse width adjusting unit 80, and even-numbered scans stored in the second memory unit 30. Predetermined data obtained by adding up image data of a line is output to the data driver 50.

For example, as shown in FIG. 5, if the data corresponding to the time interval between the scan pulses output from the pulse width adjusting unit 80 is A, the first scan line and the second scan line Scan1 and Scan2 are provided. The data pulse for the corresponding image data is 96 + A, which is 64 + A + 32. In addition, the data pulses for the image data corresponding to the third and fourth scan lines Scan3 and Scan4 become 128 + A, which is 32 + A + 96.

As can be seen in the above embodiment, since the present invention outputs the image data corresponding to the two scan lines as one pulse width modulated data pulse, the driving frequency of the data electrode can be reduced by half compared to the prior art. There is an advantage in reducing the switching noise and power consumption that can occur when driving a high-resolution panel.

As described in detail above, the present invention reduces the driving frequency of the data electrode by inputting data corresponding to two scan lines as one data pulse, thereby reducing power consumption.

In addition, the present invention has the effect of reducing the switching noise and power consumption during high resolution driving by reducing the drive frequency of the data electrode.

Claims (6)

A controller for outputting data and a control signal for the video signal obtained by processing the signal including the video signal using a predetermined signal processing scheme; A scan driver sequentially applying scan pulses to two consecutive scan lines based on the control signal output from the controller; A first memory unit configured to store first image data corresponding to odd lines of the two scan lines among data for the image signal output from the controller; A second memory unit for storing second image data corresponding to even lines of the two scan lines among the data for the image signal output from the controller; An adder configured to output third data obtained by adding first image data and second image data stored in the first memory unit and the second memory unit; A data driver for outputting a pulse width modulated data pulse by pulse width modulating the third data output from the adder based on the control signal output from the controller; And And a panel configured to display an image signal based on the data pulse output from the data driver and the scan pulse output from the scan driver. And the pulses included in the two consecutive scan lines overlap the data pulses by the first image data and the second image data corresponding to the corresponding scan lines. Summing up image data for two consecutive scan lines; Sequentially applying scan pulses to the two consecutive scan lines; Outputting a pulse width modulated data pulse by pulse width modulating the summed image data; And And displaying an image signal based on the output data pulse and the scan pulse. And the pulses included in the two consecutive scan lines overlap the data pulse with image data corresponding to the corresponding scan line. delete delete delete delete

Images