TWI444962B - Display apparatus having optical compensating function and compensating method therof - Google Patents

Description

Display device with optical compensation function and compensation method thereof

The present invention relates to a display device, and more particularly to a display device having an optical compensation function and a compensation method thereof.

With the advancement of display technology, the display panel size is increasing, and the design complexity of the drive circuit is also increased. In the conventional display panel, the capacitance parasitic effect on the signal transmission portion near the gate driving circuit is small, and therefore, the gate driving signal is less attenuated due to the slight RC delay effect, so that the gate driving The signal has a strong feed-through effect, which affects the voltage level of the source drive signal. However, the portion of the display panel remote from the gate driving circuit has a large parasitic effect on the signal transmission. Therefore, the gate driving signal is greatly attenuated due to the RC delay effect, so that the voltage of the source driving signal is The level is less affected by the feedthrough effect of the gate drive signal.

It can be seen that as the size of the display panel increases, the source driving signals of different regions in the panel are affected by the feedthrough effect of the gate driving signals of different degrees, so that different regions in the display panel respectively exhibit different optical characteristics.

Therefore, the conventional techniques still have the above drawbacks and deficiencies to be solved.

One aspect of the present disclosure is to provide a display device with an optical compensation function, including a panel, a source driving unit, a gate driving unit, and a control unit, wherein the panel includes a plurality of display regions. The source driving unit is electrically coupled to the panel for generating a source driving signal driving panel. The gate driving unit is electrically coupled to the panel for generating a gate driving signal driving panel. The control unit is electrically coupled to the source driving unit and the gate driving unit for receiving the data input signal, and obtaining corresponding compensation data according to the distance between the display area and the gate driving unit to provide compensation data to the source Drive unit.

Another aspect of the present disclosure is to provide a display device with optical compensation function, including a panel, a source driving unit, a gate driving unit, and a control unit, wherein the panel includes a plurality of display areas. The source driving unit is electrically coupled to the panel for generating a source driving signal driving panel. The gate driving unit is electrically coupled to the panel for generating a gate driving signal driving panel. The control unit is electrically coupled to the source driving unit and the gate driving unit for receiving the data input signal, and acquiring corresponding compensation data according to the degree of the feedthrough effect between the gate driving signal and the source driving signal, Provide compensation information to the source drive unit.

Yet another aspect of the present disclosure is to provide an optical compensation method for a display device, comprising the following operational steps. First, an optical test is performed on a plurality of display areas in the panel to obtain a plurality of compensation data corresponding to the display area. Subsequently, a data input signal, a clock signal, and a data enable signal are received. Next, the data input signal and the data enable signal are separated into a plurality of signal intervals. Thereafter, the clock signal is counted to determine whether the signal interval has arrived. When the signal interval arrives, the compensation data corresponding to the signal interval is obtained. Next, the compensation data is output to optically compensate the display area.

Therefore, according to the technical content described in the above embodiments of the present disclosure, the corresponding compensation data can be obtained by optically testing a plurality of areas of the panel. Then, according to the display area of the panel, the table of the compensation data is obtained and obtained, and a control signal corresponding to the level of the differential signal is generated to compensate the voltage level of the source driving signal, thereby improving the feedthrough effect of the gate driving signal. The effect of the pole drive signal allows the panel to be displayed evenly with consistent optical characteristics.

The spirit and scope of the present disclosure will be apparent from the following description of the preferred embodiments of the present disclosure. Modifications do not depart from the spirit and scope of the disclosure.

1 is a circuit block diagram of a display device 100 with optical compensation according to an embodiment of the present disclosure. The display device 100 may include a panel 110, a source driving unit 120, a gate driving unit 130, and a control unit 140. The panel 110 may include a plurality of display areas (for example, the display area 111 to the display area 11n), wherein the display area may be divided according to the distance between the display area and the gate driving unit 130. For example, a portion of the panel 110 that is closest to the gate driving unit 130 may be divided into display regions 111. On the contrary, the portion of the panel 110 that is the farthest from the gate driving unit 130 can be divided into display regions 11n.

The source driving unit 120 is electrically coupled to the panel 110 for generating a source driving signal to drive the panel 110. The gate driving unit 130 is electrically coupled to the panel 110 for generating a gate driving signal driving panel 110. The control unit 140 is electrically coupled to the source driving unit 120 and the gate driving unit 130, and the control unit 140 receives an input data signal provided by the image system, and is based on the display area and the gate driving unit. The plurality of compensation data (for example, n compensation data) are obtained according to the influence degree of the feedthrough effect between the gate driving signal and the source driving signal to provide a control signal to the source driving unit 120.

In an embodiment of the present disclosure, the control unit 140 may include a storage component 141 for storing compensation data. It should be noted that the compensation data is stored in the storage element 141 in the form of a look up table, and the storage element 141 may include an electrically erasable read-only memory (EEPROM) and may be utilized. The burning mode writes the compensation data into the electronically erasable read-only memory.

In an embodiment of the disclosure, the control unit 140 further includes a programmable logic gate array (FPGA) 142 for receiving a data enable signal (DE) and a clock signal (clock). The signal, CLK), and the control unit 140 can divide the data input signal and the data enable signal into a plurality of signal intervals according to the drawing points of the display area of the panel 110. For example, when the panel 110 is divided into the display area 111 to the display area 11n, the control unit 140 may classify the data input signal and the data enable signal into n signal sections.

For example, when the resolution of the panel 110 is W*M, and the panel 110 is divided into n display areas according to the distance from the gate driving unit 130, the number of clock counts corresponding to each signal interval can be obtained as W/n=K. Thus, the programmable logic gate array 142 can count the clock signals to determine if each signal interval has arrived. When the current pulse counts to K times, it indicates that the first signal interval arrives, and the programmable logic gate array 142 generates a corresponding first query command to the storage element 141 to obtain the compensation data of the display area 111. When the current pulse counts to 2*K times, it indicates that the second signal interval arrives, and the programmable logic gate array 142 generates a corresponding second query command to the storage element 141 to obtain the compensation data of the display area 112. Similarly, when the current pulse counts to n*K times, it indicates that the nth signal interval arrives, and the programmable logic gate array 142 generates a corresponding nth query command to the storage element 141 to obtain the compensation data of the display area 11n.

FIG. 2 is a schematic diagram showing signal timing of a display device 100 with optical compensation function according to an embodiment of the present disclosure. For example, the panel 110 of the display device 100 can be divided into n display regions (for example, the display region 111 to the display region 11n). The control unit 140 can receive the data input signal, the clock signal, and the data enable signal, and the control unit 140 divides the data input signal and the data enable signal into n signal intervals according to the drawing points of the display area of the panel 110 (for example, the signal The interval T1 to the signal interval Tn). When the data enable signal is pulled high, the data input signal received by the control unit 140 is regarded as a valid signal, and the programmable logic gate array 142 starts counting the clock signal to determine whether the signal interval has arrived. When the signal interval T1 arrives, the programmable logic gate array 142 generates a corresponding first query command to the storage component 141 to obtain compensation data corresponding to the display area 111. When the signal interval T2 arrives, the programmable logic gate array 142 generates a corresponding second query command to the storage component 141 to obtain compensation data corresponding to the display area 112. Similarly, when the signal intervals T3 to Tn arrive in sequence, the programmable logic gate array 142 sequentially generates corresponding third query commands to nth query commands to the storage component 141 to obtain compensation data corresponding to the display regions 113-11n. . Subsequently, the data enable signal is pulled low to end the line data transfer. Then, after the preset interval time, the data enable signal is pulled high again to transfer the next line data.

In this embodiment, the data input signal has the same differential signal level L32-L32 in each signal interval, so that the control unit 140 can output the control signal with the differential signal level L32-L32 to the source when the compensation has not been performed. The pole drive unit 120. It should be noted that the differential signal level L32-L32 represents a voltage amplitude of a positive polarity of +L32 and a negative polarity of -L32. Therefore, after receiving the above control signal, the source driving unit 120 can correspondingly generate a source driving signal with a specific voltage level, so that the display area of the panel 110 can display a specific illuminance (Lux).

The control unit 140 can generate a corresponding query command in each signal interval to obtain compensation data corresponding to each display area, so that the control unit 140 can generate a control signal of the differential signal level L31-L33 corresponding to the display area 111, corresponding to The display area 112 generates a control signal of the differential signal level L32-L32, a control signal corresponding to the display area 113 for generating the differential signal level L33-L31, ..., and a control for generating a differential signal level corresponding to the display area 11n. The signal is applied to the source driving unit 120 such that the display area 111 to the display area 11n in the panel 110 have the same optical characteristics (for example, having uniform illumination).

FIG. 3 is a timing diagram showing driving signals of a display device 100 with optical compensation function according to an embodiment of the present disclosure. In this embodiment, the panel 110 can be divided into three display areas (for example, display area 111 to display area 113) such as near, medium, and far according to the distance from the gate driving unit 130. In the display area 111, because of the closest distance to the gate driving unit 130, the source driving signal is affected by the feedthrough effect of the strong gate driving signal, so that the voltage level of the source driving signal is generated. Offset. Therefore, in this embodiment, the control unit 140 may perform a table lookup according to the corresponding display area 111 to adjust the differential signal level of the original control signal from L32-L32 to L31-L33 for compensating the source driving signal. Voltage level. Similarly, the distance between the display region 112 and the gate driving unit 130 is relatively long, so the source driving signal is less affected by the feedthrough effect of the gate driving signal, so the source driving signal does not need to compensate for the voltage level. And maintain the differential signal level of the control signal as L32-L32. In this embodiment, the distance between the display region 113 and the gate driving unit 130 is the farthest, so the source driving signal is less affected by the feedthrough effect of the gate driving signal, and the voltage level of the source driving signal may be required. Adjustment. At this time, the control unit 140 may perform a look-up according to the corresponding display area 113 to adjust the differential signal level of the original control signal from L32-L32 to L33-L31 to compensate the voltage level of the source driving signal. It can be seen that after the look-up table and signal compensation of the corresponding display area, all display areas in the panel 110 can have the same optical characteristics (for example, have consistent illumination).

4 is a flow chart showing an optical compensation method of a display device according to an embodiment of the present disclosure. In this embodiment, the optical compensation may be achieved by using the display device 100 as shown in FIG. 1. The circuit structure is the same as or similar to the above embodiment, and details are not described herein again. First, in step 410, a plurality of display areas (for example, display area 111 to display area 11n) in the panel 110 may be optically tested to obtain a plurality of compensation materials required for the corresponding display area. Subsequently, in step 420, the data input signal, the clock signal, and the data enable signal may be received by the control unit 140. Next, in step 430, the control unit 140 may distinguish the data input signal from the data enable signal into a plurality of signal intervals (eg, n signal intervals). Thereafter, in step 440, control unit 140 may count the clock signal to determine if the signal interval has arrived. When the signal interval arrives, control unit 140 may generate a corresponding query command to query the pre-established lookup table, as shown in step 450. Subsequently, in step 460, the control unit 140 may acquire compensation data corresponding to the signal interval. Next, in step 470, the control unit 140 may output compensation data to optically compensate the display area.

It should be noted that the display area may be divided according to the size of the display area or the distance between the display area and the gate driving unit 130. For example, when the X-axis dimension of the panel 110 is 200 cm, the panel 110 can be divided into n display areas (for example, the display area 111 to the display area 11n) according to the X-axis size of the panel 110, so that each display The X-axis dimension of the area is 200 cm/n. In an embodiment in which the horizontal resolution of the panel 110 is 1920, the panel 110 can be sequentially divided into n display areas according to the distance between the panel 110 and the gate driving unit 130 (for example, the display area 111~) The display area 11n) is such that the horizontal resolution of each display area is 1920/n. In addition, in the embodiment, the operation mode of the display device 100 is the same as or similar to the embodiment shown in FIG. 1 to FIG. 3, and details are not described herein again.

In an embodiment of the present disclosure, the signal interval is adjustable depending on the number of display regions. That is, when the panel 110 is divided into n display areas, the data input signal and the data enable signal are also divided into n signal intervals to generate corresponding query commands (eg, the first query command to the nth). Query command).

Compared with the conventional method, in the above embodiment of the present disclosure, the corresponding compensation data can be obtained by optically testing a plurality of regions of the panel. Then, according to the display area of the panel, the table of the compensation data is obtained and obtained, and a corresponding control signal of the differential signal level is generated to compensate the voltage level of the source driving signal, thereby improving the feedthrough effect of the gate driving signal. The effect of the source drive signal allows the panel to be displayed uniformly and with consistent optical characteristics.

The steps mentioned in the present disclosure may be adjusted according to actual needs, except for the order in which they are specifically described, and may be performed simultaneously or partially simultaneously, without being limited to the above.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100. . . Display device

110. . . panel

111~11n. . . Display area

120. . . Source drive unit

130. . . Gate drive unit

140. . . control unit

141. . . Storage element

142. . . Programmable logic gate array

410～470. . . Steps

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.

1 is a circuit block diagram of a display device with optical compensation function according to an embodiment of the present disclosure.

2 is a schematic diagram showing signal timing of a display device with optical compensation function according to an embodiment of the present disclosure.

3 is a timing diagram showing driving signals of a display device with optical compensation function according to an embodiment of the present disclosure.

4 is a flow chart showing an optical compensation method of a display device according to an embodiment of the present disclosure.

100. . . Display device

110. . . panel

111~11n. . . Display area

120. . . Source drive unit

130. . . Gate drive unit

140. . . control unit

141. . . Storage element

142. . . Programmable logic gate array

Claims (15)

A display device with optical compensation function includes: a panel comprising a plurality of display areas; a source driving unit electrically coupled to the panel for generating a source driving signal to drive the panel; and a gate driving unit Electrically coupled to the panel for generating a gate drive signal to drive the panel; and a control unit electrically coupled to the source drive unit and the gate drive unit for receiving a data input signal and for a moment a pulse signal, and dividing the display areas according to the distance between the display area and the gate driving unit, and dividing the data input signal into a plurality of signal intervals according to the drawing points of the display areas, wherein the control unit Counting the clock signal to determine whether the signal intervals are reached. When the signal intervals arrive, the control unit acquires a plurality of compensation data corresponding to the display areas, and provides the compensation materials to the source driving unit. . The device of claim 1, wherein the control unit comprises a storage component for storing the compensation materials. The device of claim 2, wherein the compensation data is stored in a lookup table. The device of claim 2, wherein the control unit further comprises A programmable logic gate array for receiving a data enable signal and the clock signal. The device of claim 4, wherein the control unit distinguishes the data enable signal into the signal intervals according to the scores of the display areas. The device of claim 4, wherein the programmable logic gate array counts the clock signal and generates a query command to the storage component to obtain the corresponding compensation data. A display device with optical compensation function includes: a panel comprising a plurality of display areas; a source driving unit electrically coupled to the panel for generating a source driving signal to drive the panel; and a gate driving unit Electrically coupled to the panel for generating a gate drive signal to drive the panel; and a control unit electrically coupled to the source drive unit and the gate drive unit for receiving a data input signal and for a moment Pulse signal, and the data input signal is divided into a plurality of signal intervals, wherein the control unit counts the clock signal to determine whether the signal intervals arrive, and when the signal intervals arrive, the control unit acquires The signal interval corresponds to a plurality of compensation data, and the compensation data is provided to the source driving unit, wherein the compensation data corresponds to a degree of feedthrough effect between the gate driving signal and the source driving signal. The device of claim 7, wherein the control unit comprises a storage component for storing the compensation materials. The device of claim 8, wherein the compensation data is stored in a lookup table. The device of claim 8, wherein the control unit further comprises a programmable logic gate array for receiving a data enable signal and the clock signal. The device of claim 10, wherein the control unit distinguishes the data input signal from the data enable signal into the signal intervals according to the scores of the display areas. The device of claim 10, wherein the programmable logic gate array counts the clock signal and generates a query command to the storage component to obtain the corresponding compensation data. An optical compensation method for a display device includes: performing an optical test on a plurality of display areas in a panel to obtain a plurality of compensation data corresponding to the display areas, wherein the compensation data corresponds to a gate driving signal and a The extent of the feedthrough effect between the source drive signals; Receiving a data input signal, a clock signal and a data enable signal; separating the data input signal from the data enable signal into a plurality of signal intervals; counting the clock signal to determine whether the signal intervals are reached; When the signal intervals arrive, the compensation data corresponding to the signal intervals are obtained; and the compensation data is output to optically compensate the display regions. The method of claim 13, wherein the display areas are scored according to a size of the display area or a distance between the display areas and a gate driving unit. The method of claim 13, wherein the signal intervals are adjustable according to the number of the display areas.