TWI397315B - An adjusting method and an adjusting apparatus adapted in a display apparatus - Google Patents

Description

Display device adjustment method and adjustment device

The present invention relates to an adjustment method and an adjustment device, and more particularly to an adjustment method and an adjustment device for a display device.

The display device is an indispensable device in the peripheral device of the computer. How to present a picture in a situation where the user's eyes feel comfortable is an important criterion for judging the merits of a display device.

Under the consideration of power saving, the display device in the power saving mode will present the picture at a lower picture frequency than the normal mode. Because the picture frequency is low, the power supply will consume less power, but it also creates new problems. The reduction of the picture frequency brings two problems: the charging rate and the leakage current caused by the widening of the pulse width of the gate. An increase in the charge rate will darken the picture, and an increase in the amount of leakage will brighten the picture. Because of these changes, the brightness of the display device will vary with the frequency of the picture, causing discomfort to the human eye. In addition, when the frequency is lowered, the difference in the difference between the positive and negative voltages and the common voltage causes the degree of flicker of the screen to be different, which may cause discomfort to the human eye.

Therefore, how to design a display device that can affect the brightness and the degree of flicker when switching between different display modes is an urgent problem to be solved in the industry.

Therefore, an object of the present invention is to provide a method for adjusting a display device, comprising the steps of: providing a first pulse width; providing a second pulse width; determining a picture frequency of the display device; and when the picture frequency is in the first picture frequency range And outputting an adjustment waveform having a first pulse width; and outputting an adjustment waveform having a second pulse width when the picture frequency is in the second picture frequency range.

Another object of the present invention is to provide an adjustment device for a display device, comprising: a time control module connected to a gate driver of the display device; and a storage module electrically coupled to the time control module. The storage module is configured to store the first pulse width and the second pulse width; wherein the time control module determines a picture frequency of the display device, so that when the picture frequency is in the first picture frequency range, the output has the first pulse wave One of the widths adjusts the waveform; when the picture frequency is in the second picture frequency range, the output has one of the second pulse width adjustment waveforms.

The invention has the advantages that the pulse width is adjusted to an optimal value by the ideal pulse width stored by the storage module of the invention, so that the brightness can be maintained at an optimal brightness after the screen frequency is changed, and To achieve the above objectives.

The objects, features, and advantages of the invention will be apparent to those skilled in the <RTI

Fig. 1 is a view showing a first embodiment of the display device of the present invention. As shown in FIG. 1, the display device 1 includes an adjustment device 10 and a gate driver 12. The adjustment device 10 includes a time control module 100 and a storage module 102. The time control module 100 is connected to the gate driver 12 of the display device 1 , and the storage module 102 is electrically connected to the time control module 100 . The storage module 102 is configured to store the first pulse width and the second pulse width. In other embodiments, the storage module 102 can selectively store the third, fourth, ..., nth pulse widths, and depends on the number of display modes that the display device 1 has, and the present invention is not limited to the present embodiment. The number exemplified in the example. Each pulse width can correspond to a picture frequency range. The time control module 100 determines the picture frequency 101 of the display device 1 to output one of the first pulse width adjustment waveforms 103 when the picture frequency 101 is in the first picture frequency range; and when the picture frequency is in the second picture frequency range And outputting one of the second pulse width adjustment waveforms 103. For example, if the display device 1 has two display modes of 60 Hz and 40 Hz, the time control module 100 will capture the first pulse corresponding to 55 Hz-65 Hz in the storage module 102 when the picture frequency falls within the interval of 55 Hz-65 Hz. The value of the wave width is set to the pulse width of the output adjustment waveform 101 as the first pulse width; when the picture frequency 101 falls within the interval of 35 Hz-45 Hz, the time control module 100 will capture the corresponding 35 Hz in the storage module 102. The value of the second pulse width of -45 Hz is set to the pulse width of the output adjustment waveform 101 to the second pulse width.

The second pulse width is set between the first pulse width and the second reference pulse width, wherein the second reference pulse width is the first pulse width, by the first picture reference frequency and the second picture Obtained as a multiple of the reference frequency. In the foregoing example, the first and second picture reference frequencies are 40 Hz and 60 Hz, respectively, and the second reference pulse width is 60/40 of the first pulse width, that is, 3/2 times. Therefore, the second pulse width is set between the first pulse width and the third pulse width (ie, the second reference pulse width) of 3/2 times.

Figure 2 is a waveform diagram of the adjustment waveform of the present invention. As shown in FIG. 2, the signal group 20 represents two picture frequencies, the signal group 21 represents an adjustment waveform having a first pulse width 210 and a second reference pulse width 211, and the signal group 22 represents a first pulse width 210. And an adjustment waveform of the second pulse width 212.

In other embodiments, the second pulse width can be set according to the first brightness and the second brightness of the display device 1. The first brightness is the brightness of the picture frequency in the first picture frequency range; the second brightness is the brightness of the picture frequency in the second picture frequency range. The second pulse width is such that the first brightness and the second brightness difference are less than an ideal brightness difference value.

The adjustment waveform 103 is output to the gate driver 12 of the display device 1. The gate driver 12 is further connected to the gates (not shown) of the plurality of pixel units, and the adjustment waveform 103 is used to control the charging period of the pixel unit. The brightness of the display device 1 is adjusted.

Table 1 is for the display mode of 60Hz conversion to 40Hz, after inputting different data grayscale level conditions (L16, L32, L48), the first pulse width and the second reference pulse width are respectively used on the adjustment waveform 101. And comparison of the brightness values of the second pulse width. It can be observed from Table 1 that if the pulse width is not changed and the first pulse width (ie, 17.4 um) is used, the brightness will be brightened; if the frequency is directly proportional to the frequency, the second reference pulse width is used (ie 26um), the brightness will be darkened accordingly; and the invention is further adjusted to the second pulse width (ie 22um)' to keep the brightness constant and to make the human eye feel comfortable.

In the second embodiment of the present invention, the storage module 102 can store the first start time and the second start time. The time control module 100 outputs the adjustment waveform 103 at the first start time when the picture frequency 101 is in the first picture frequency range; and outputs the adjustment waveform 103 at the second start time if the picture frequency is in the second picture frequency range. As shown in FIG. 2, the signal group 23 is an adjustment waveform 103 representing the signal group 22 after being adjusted by the first start time 231 and the second start time 232. By controlling the start time, the adjustment waveform can be further adjusted to optimize the brightness of the display device.

Fig. 3 is a view showing a display device of a third embodiment of the present invention. As shown in FIG. 3, the display device 3 is different from the first embodiment only in that the time control module 300 further includes a detection module 304 and a comparison module 306, which can adjust the waveform 303. Has a chamfered corner. The pixel unit (not shown) to which the gate driver 32 of the display device 3 is connected further includes a common electrode (not shown). The detecting module 304 is configured to detect a voltage difference of one of the common electrodes at the start and end of one of the waveforms of the adjustment waveform 301. The comparison module 306 is configured to compare the first voltage difference when the picture frequency 301 is in the first picture frequency range, and the second voltage difference when the picture frequency 301 is in the second picture frequency range, and enable the time control module. When the picture frequency 301 is shifted from the first picture frequency range to the second picture frequency range, if the second voltage difference is greater than the first voltage difference, one of the second pulse wave clipping amplitudes is increased. By changing the amplitude of the chamfer, it is possible to adjust the effect caused by the difference in frequency, the difference between the positive and negative voltages and the common voltage, and the degree of flickering of the screen is different, so that the human eye feels comfortable. Referring to FIG. 2, the signal groups 24a, 24b, and 24c are representative of the adjustment waveforms 303 of the signal group 22 which are adjusted by the detection module 304 and the comparison module 306, and are output to the three pixel units. Waveform after the gate. In other embodiments, the signal groups 25a, 25b, and 25c of FIG. 2 can be generated in combination with the first embodiment to have an appropriate waveform width 303 of the pulse width, the chamfer, and the start time.

A fourth embodiment of the present invention, as shown in FIG. 4, is a flowchart of a method of adjusting a display device, which uses the adjusting device as described in the first embodiment. First, step 401 is performed to provide a first pulse width; then step 402 is performed to provide a second pulse width; step 403 is executed to determine a screen frequency of the display device; and step 404 is executed to output a waveform corresponding to one of the pulse widths. When the picture frequency is in the first picture frequency range, the output has one of the first pulse width adjustment waveforms; when the picture frequency is in the second picture frequency range, the output has one of the second pulse width adjustment waveforms.

A fifth embodiment of the present invention, as shown in FIG. 5, is a flowchart of a method of adjusting a display device, which uses the adjusting device as described in the second embodiment. First, step 501 is performed to provide a first pulse width and a first start time. Then, step 502 is performed to provide a second pulse width and a second start time. Step 503 is performed to determine a screen frequency of the display device. Step 504 is performed. And outputting a waveform corresponding to one of a pulse width and a start time; when the picture frequency is in the first picture frequency range, outputting one of the first pulse width adjustment waveforms at the first start time; when the picture frequency is located in the second picture The frequency range outputs an adjustment waveform having a second pulse width at the second start time.

In the fourth and fifth embodiments, when the picture frequency has changed, the method further includes a step of detecting a voltage difference of one of the common electrodes at the start and end of the pulse wave of the adjustment waveform. If the picture frequency is converted from the first picture frequency to the second picture frequency, and the second voltage difference of the second picture frequency range is greater than the first voltage difference of the first picture frequency range, the clipping amplitude of the second pulse wave is increased.

According to the preferred embodiment of the present invention, the advantage of the application of the present invention is that the brightness and the flicker of the picture can be adjusted to the human eye through the modulation of the pulse width, the start time and the chamfer amplitude of the adjustment waveform. The extent of it.

While the present invention has been described above by way of example, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. Other different embodiments are contemplated, and the scope of the present invention is defined by the scope of the appended claims.

1. . . Display device

10. . . Adjustment device

100. . . Time control module

101. . . Picture frequency

102. . . Storage module

103. . . Adjust waveform

12. . . Gate driver

20, 21, 22, 23, 24, 25. . . News

210. . . First pulse width number group

211. . . Second reference pulse width

212. . . Second pulse width

231. . . First start time

232. . . Second start time

3. . . Display device

300. . . Time control module

301. . . Picture frequency

302. . . Storage module

303. . . Adjust waveform

304. . . Detection module

306. . . Comparison module

32. . . Gate driver

Figure 1 is a block diagram of an embodiment of a display device of the present invention.

Fig. 2 is a waveform diagram of the adjustment waveform of the present invention.

Figure 3 is a block diagram of another embodiment of the display device of the present invention.

Figure 4 is a flow chart showing the method of adjusting the display device of the present invention.

Fig. 5 is another flow chart showing the method of adjusting the display device of the present invention.

1. . . Display device

10. . . Adjustment device

100. . . Time control module

101. . . Picture frequency

102. . . Storage module

103. . . Adjust waveform

12. . . Gate driver

Claims (16)

A method for adjusting a display device, the method comprising the steps of: providing a first pulse width; providing a second pulse width, wherein the first pulse width is different from the second pulse width; determining one of the display devices a picture frequency; when the picture frequency is in the first picture frequency range, outputting an adjustment waveform having the first pulse width; and when the picture frequency is in the second picture frequency range, the output has the second pulse width Adjust the waveform. The adjustment method of claim 1, further comprising the steps of: providing a first picture reference frequency and a second picture reference frequency, and obtaining a multiple of the second picture reference frequency and the first picture reference frequency; And obtaining a second reference pulse width according to the multiple relationship and the first pulse width; and setting the second pulse width between the first pulse width and the second reference pulse width. The adjustment method of claim 1, further comprising the steps of: providing a first start time, when the picture frequency is in the first picture frequency range, outputting the adjustment waveform at the first start time; A second start time is provided, and when the picture frequency is in the second picture frequency range, the adjustment waveform is outputted at the second start time. The adjustment method of claim 1, further comprising setting an opening time interval of the two adjacent pulse waves according to the picture frequency. The method for adjusting the method of claim 1, further comprising: providing an ideal brightness difference value; detecting the first brightness of the display device, when the picture frequency of the display device is in the first picture frequency range; detecting a second brightness of the display device, when a picture frequency of the display device is in a second picture frequency range; setting the second pulse width such that the first brightness and the second brightness difference are smaller than the ideal brightness difference value. The adjustment method of claim 1, wherein the adjustment waveform is output to a gate driver of the display device, and the gate driver is further connected to a gate of the plurality of pixel units, the adjustment waveform is It is used to control one charging cycle of the pixel units. The adjustment method of claim 1, wherein the adjustment waveform has a chamfer angle. The adjustment method described in claim 7 of the patent application, wherein the display device The method includes the following steps: the detection picture frequency is in the first picture frequency range, and the first voltage difference of the common electrode is started and ended at one of the adjustment waveforms; detecting the picture frequency Located in the second picture frequency range, the second voltage difference of the common electrode at the beginning and the end of the pulse wave; comparing the first voltage difference and the second voltage difference; when the second voltage difference is greater than the first voltage Poor, increasing the clipping angle of the second pulse. The adjustment method of claim 8, further comprising providing a third picture frequency range, and obtaining a third pulse width corresponding to the third picture frequency range and corresponding to one of the third picture frequency ranges The angle of the chamfer. An adjustment device for a display device, the display device having a gate driver, the adjustment device comprising: a time control module connected to the gate driver of the display device; and a storage module electrically connected Controlling the module at the time, and the storage module is configured to store the first pulse width and the second pulse width; wherein the time control module determines a picture frequency of the display device, so that when the picture frequency is located In a picture frequency range, the output has one of the first pulse width adjustment waveforms; when the picture frequency is in the second picture frequency range, the output has one of the second pulse width adjustment waveforms. An adjustment device according to claim 10, wherein the The second pulse width is set between the first pulse width and the second reference pulse width, and the second reference pulse width is the first pulse width, by the first picture reference frequency and the second picture Obtained as a multiple of the reference frequency. The adjustment device of claim 10, wherein the storage module further stores a first start time and a second start time; wherein the time control module is located at the first picture frequency range, The first start time outputs the adjustment waveform; when the picture frequency is in the second picture frequency range, the adjustment waveform is outputted at the second start time. The adjusting device according to claim 10, wherein the adjusting waveform is output to a gate driver of the display device, and the gate driver is connected to a gate of a plurality of pixel units, wherein the adjusting waveform is used for Controlling one of the pixel units' charging cycles to adjust the brightness of one of the display devices. The adjustment device of claim 10, wherein the adjustment waveform has a chamfer angle. The adjustment device of claim 14, wherein the display device comprises a common electrode, the time control module comprises: a detection module, wherein the detection module is configured to detect one of the adjustment waveforms a voltage difference of the common electrode at the beginning and the end of the pulse wave; and a comparison module for comparing the first voltage difference when the picture frequency is in the first picture frequency range, and the picture frequency is located in the second picture Second in the frequency range The voltage difference is such that the time control module increases a chamfering amplitude of the second pulse wave when the second voltage difference is greater than the first voltage difference. The adjusting device of claim 10, wherein the storage module stores a third pulse width such that when the picture frequency is in the third picture frequency range, the output has one of the third pulse width adjustments. Waveform.