TWI708240B - Display device and operating method thereof - Google Patents

Abstract

An operating method of a display device includes sensing, through a sensing component, an interacting signal of an interacting component, in which the interacting signal corresponds to an operating frequency; and controlling a plurality of pixel circuit to perform a display operation in response to a display frequency, in which the display frequency is different from the operating frequency.

Description

Display device and operation method thereof

This case involves an electronic device and a method. Specifically, this case relates to a display device and an operation method thereof.

With the development of technology, display devices have been widely used in people's lives.

A typical display device may include a timing controller, a gate driver, a source driver, and a pixel array. The timing controller is used to receive the display data and provide corresponding signals to the gate driver and the source driver, so that the gate driver and the source driver control the pixel array for display.

However, in some applications, the timing controller, the gate driver, the source driver, and the signal of the pixel array and the signals of other elements interfere with each other and cause noise, which affects the display quality.

An implementation aspect of this case relates to an operating method of a display device. According to an embodiment of the present case, the operating method includes: sensing an interactive signal of an interactive element through a sensing element, wherein the interactive signal has an operating frequency; and controlling a plurality of pixel circuits to perform display operations corresponding to a display frequency, wherein The display frequency is substantially different from the operating frequency.

Another aspect of this case relates to a display device. According to an embodiment of the present case, the display device includes: a sensing element and a controller. The sensing element is used for sensing an interactive signal of an interactive element, wherein the interactive signal has an operating frequency. The controller is used for controlling the plurality of pixel circuits to perform display operation corresponding to a display frequency, wherein the display frequency is substantially different from the operating frequency.

By applying the above-mentioned embodiment, the interaction signal and the signal of the display device can be prevented from interfering with each other, thereby improving the quality of the display device.

The following will clearly illustrate the spirit of the present disclosure with diagrams and detailed descriptions. Any person with ordinary knowledge in the technical field who understands the embodiments of the present disclosure can change and modify the techniques taught in the present disclosure. It does not depart from the spirit and scope of this disclosure.

Regarding "first", "second", etc. used in this text, they do not specifically refer to order or sequence, nor are they used to limit the present invention. They are only used to distinguish elements or operations described in the same technical terms.

Regarding the "electrical coupling" used in this article, it can mean that two or more components make physical or electrical contact with each other directly, or make physical or electrical contact with each other indirectly, and "electrical coupling" can also refer to Two or more elements operate or act mutually.

Regarding the "include", "include", "have", "contain", etc. used in this article, they are all open terms, which means including but not limited to.

Regarding the "and/or" used in this article, it includes any or all combinations of the aforementioned things.

Regarding the terms used in this article, unless otherwise specified, each term usually has the usual meaning used in the field, in the content disclosed here, and in the special content. Some terms used to describe the present disclosure will be discussed below or elsewhere in this specification to provide those skilled in the art with additional guidance on the description of the present disclosure.

FIG. 1 is a schematic diagram of a display device 10 according to an embodiment of the present application. In this embodiment, the display device 10 includes a controller 100, a pixel circuit 106, a source driver SD, a gate driver 40, data lines DL1-DL4, gate lines GL1, GL2, a pixel circuit 106, and a sensing element SSR . In this embodiment, the pixel circuits 106 are arranged in a matrix form. In one embodiment, the controller 100 is electrically connected to the source driver SD and the gate driver 40.

It should be noted that in this embodiment, although the 2*4 size display device 10 is taken as an example for description, the number of components and circuits in the display device 10 is not limited to this, and other numbers of the above-mentioned components and The line is also within the scope of this case.

In one embodiment, the sensing device SSR is used to sense an interactive signal from an interactive device. In one embodiment, the interactive element may be a stylus, but it is not limited to this. In one embodiment, the aforementioned interactive signal has a specific operating frequency (such as 25 kHz). In one embodiment, the sensing element SSR can output the sensing signal to the corresponding element for processing according to the sensed interactive signal.

In one embodiment, the controller 100 is used to control the pixel circuit 106 to perform display operations (such as updating the data voltage on the pixel circuit 106) corresponding to the display frequency. In one embodiment, this display frequency includes the working frequency that may be involved in the display operation of the display device 10. In one embodiment, the controller 100 can be implemented by, for example, a timing controller, but it is not limited thereto. The specific details about the display frequency will be further explained in the following paragraphs.

In one embodiment, the display frequency and the operating frequency of the interactive signal are substantially different. In one embodiment, the controller 100 can adjust the settings of the display device 10 so that the display frequency and the operating frequency of the interactive signal are substantially different. In this way, it is possible to avoid interference between the signals of the interactive element and the display device.

It should be noted that the above-mentioned "substantially different" means that the display frequency and the operating frequency of the interactive signal have a certain degree of difference, so as to avoid interference between the interactive signal and the signal of the display device 10. For example, if the operating frequency of the interactive signal is 25kHz and the display frequency is 25.5kHz, and the interactive signal and the signal of the display device 10 do not interfere with each other to cause significant noise, the display frequency and the operating frequency of the interactive signal are substantially different. In contrast, if the operating frequency of the interactive signal is 25kHz and the display frequency is 25.5kHz, but the interactive signal and the signal of the display device 10 interfere with each other to cause noise, which affects the operation of the display device 10, or causes the display device 10 to fail the verification standard. The display frequency and the operating frequency of the interactive signal are not substantially different.

In one embodiment, the aforementioned display frequency can be controlled based on a horizontal blanking value and/or a vertical blanking value, which is different from the operating frequency of the aforementioned interactive signal.

In one embodiment, the above-mentioned display frequency may be calculated by the screen update frequency, the sum of the number of pixels in the horizontal direction and the horizontal shading value of the display device 10, and the sum of the number of pixels in the vertical direction and the vertical shading value of the display device 10. For example, display frequency=picture update frequency*sum of the number of pixels in the horizontal direction and the horizontal shading value of the display device 10*sum of the number of pixels in the vertical direction and the vertical shading value of the display device 10.

Referring to Figure 2, the waveforms W1-W4 are used to represent the periods corresponding to the aforementioned display frequency under different horizontal shading values or vertical shading values.

For example, when the number of pixels in the horizontal direction of the display device 10 is 768, the period length of the waveform W1 corresponding to the horizontal shading value of 26 and the period length of the waveform W2 corresponding to the horizontal shading value of 86 are different from each other Therefore, the controller 100 can change the display frequency by changing the horizontal shading value, so that the display frequency and the operating frequency of the interactive signal are substantially different.

Similarly, when the number of pixels in the vertical direction of the display device 10 is 1366, the period length of the waveform W3 corresponding to the vertical shading value of 234 and the period length of the waveform W4 corresponding to the vertical shading value of 120 are mutually exclusive. Therefore, the controller 100 can change the display frequency by changing the vertical shading value, so that the display frequency and the operating frequency of the interactive signal are substantially different.

With the above arrangement, the signals of the interactive element and the display device can be prevented from interfering with each other.

Refer to Figure 1 again. In one embodiment, the controller 100 is used to provide the clock signal CLK to the gate driver 40 and to provide the trigger signal XSTB to the source driver SD.

In one embodiment, the gate driver 40 is used to provide gate signals G1 and G2 to the pixel circuits 106 through the gate lines GL1 and GL2 in response to the clock signal CLK, so as to respectively turn on the pixel circuits 106 in the pixel circuits 106. Switch. In one embodiment, the gate driver 40 generates gate signals G1 and G2 according to the clock signal CLK. In one embodiment, the working time of the clock signal CLK in each cycle (for example, the time with a high voltage level) is approximately equal to the working time of the gate signals G1 and G2 (for example, the time with a high voltage level) .

In one embodiment, the source driver SD is used to provide the data voltages VD1-VD4 to the pixel circuit 106 according to the trigger signal XSTB. In one embodiment, the source driver SD outputs the data voltages VD1-VD4 to the pixel circuit 106 in response to receiving the trigger signal XSTB. For example, when the source driver SD receives a trigger signal XSTB, the source driver SD outputs the first set of data voltages VD1-VD4; and when the source driver SD receives the next trigger signal XSTB, the source driver SD outputs the first Two sets of data voltages VD1-VD4, wherein the voltage levels of the two sets of data voltages VD1-VD4 can be different from each other.

In one embodiment, the controller 100 is used to determine whether the display frequency is substantially the same as the operating frequency of the aforementioned interactive signal, and automatically adjust the display frequency accordingly.

Refer to Figure 3. In one embodiment, the controller 100 can calculate the time difference between the rising and falling edges of the clock signal CLK and the trigger signal XTB, and determine whether the display frequency is substantially the same as the operating frequency of the aforementioned interactive signal (that is, to determine Whether the frequency and the operating frequency of the aforementioned interactive signal interfere with each other).

For example, the time difference between the rising edge of the clock signal CLK and the rising edge of the first trigger signal XTB1 is time TA, the time difference between the rising edge and the falling edge of the first trigger signal XTB1 is time TB, and the time difference of the first trigger signal XTB1 The time difference between the falling edge and the rising edge of the second trigger signal XTB2 is time TC, the time difference between the rising edge and the falling edge of the second trigger signal XTB2 is time TD, and the falling edge of the second trigger signal XTB2 and the clock signal The time difference between the falling edges of CLK is time TE. The controller 100 can calculate the complex operation time according to the time TA-TE, and determine whether the corresponding frequency of the operation time (which can be a different aspect of the aforementioned display frequency) and the operation frequency of the aforementioned interactive signal are substantially the same (that is, judge the aforementioned display Whether the frequency and the operating frequency of the aforementioned interactive signal interfere with each other), and based on whether to adjust the aforementioned display frequency.

It should be noted that in different embodiments, the signal form of the clock signal CLK and the trigger signal XTB can change at any time according to actual requirements (for example, the trigger signal XTB can be a reverse trigger signal), so the time TA-TE is not defined It is limited to the foregoing embodiment.

In an embodiment, the controller 100 may add the time TA-TE to calculate the aforementioned operating time. In one embodiment, the controller 100 cyclically adds the time TA-TE to calculate the aforementioned operating time. For example, the controller 100 may calculate the operation time TO1=TA+TB+TC+TD+TE+TA+TB, calculate the operation time TO2=TB+TC+TD+TE+TA+TB+TC+TD, calculate the operation time TO3 =TC+TD+TE+TA+TB+TC+TD, calculation operation time TO4=TD+TE+TA+TB+TC+TD+TE+TA+TB+TC+TD+TE+TA, and so on .

In one embodiment, after calculating the aforementioned operating time, the controller 100 can determine whether there is any one of the aforementioned operating time corresponding to the operating frequency of the aforementioned interactive signal by using the time range corresponding to the operating frequency of the aforementioned interactive signal. The frequency is essentially the same. For example, when the operating frequency of the aforementioned interactive signal is 25 kHz, the corresponding period is 40 μs. The controller 100 can determine whether the corresponding frequency of any one of the aforementioned operating times is within a time range (such as 39 μs to 41 μs) corresponding to the operating frequency of the aforementioned interactive signal to determine whether there is any of the aforementioned operating times The corresponding frequency of is substantially the same as the operating frequency of the aforementioned interactive signal.

It should be noted that the above time range values are only examples, and other time range values are also within the scope of this case. In addition, in different embodiments, the aforementioned time range may be predetermined or dynamically adjustable.

In one embodiment, the corresponding frequency corresponding to any one of the aforementioned operating times is substantially the same as the operating frequency of the aforementioned interactive signal. The controller 100 can adjust the interval time of the trigger signal XSTB so that the corresponding frequency of the aforementioned operating time is Both are substantially different from the operating frequency of the aforementioned interactive signal. For example, the controller 100 can reduce the aforementioned time TC or TE, so that the corresponding frequency of the aforementioned operating time is substantially different from the operating frequency of the aforementioned interactive signal. In different embodiments, the controller 100 may also use other methods (such as reducing the aforementioned time TB, TD) so that the corresponding frequency of the aforementioned operating time is substantially different from the operating frequency of the aforementioned interactive signal. Therefore, this case is not limited to the foregoing embodiment.

With the above arrangement, the signals of the interactive element and the display device 10 can be prevented from interfering with each other.

The following will illustrate an operation example of this case with Figure 4, but this case is not limited to this.

As shown in the figure, the curve C1 roughly represents the first operating frequency interval (for example, pressing operation) of the interactive element, which is roughly between 18-23 kHz. The curve C2 roughly represents the second operating frequency range of the interactive element (for example, hovering), which is roughly between 23.44-26.8 kHz. The operating frequency of the aforementioned interactive signal is 25.15 kHz, which is the center frequency of the second operating frequency range.

Refer to the following table at the same time, which shows the aforementioned time TA-TE (all in μs) for different operating modes M1-M7. TA TB TC TD TE M1 2.6 0.54 10.2 0.54 7.47 M2 2.6 0.54 10.19 0.54 7.46 M3 2.6 0.54 9.9 0.54 7.3 M4 2.6 0.54 9.14 0.54 6.7 M5 2.6 0.54 8.9 0.54 6.3 M6 2.6 0.54 8.78 0.54 6.2 M7 2.6 0.54 8.5 0.54 6

In this operation example, since the corresponding frequencies of the aforementioned operating time after the cyclic addition of the operating modes M1-M5 are 23.4kHz, 23.44kHz, 23.9kHz, 26kHz, 26.5kHz, it may interact with the corresponding operating frequency of 25.15kHz The signals interfere with each other. Therefore, the controller 100 can reduce the aforementioned time TC and/or TE, and enter the operation modes M6 and M7. Since the corresponding frequencies of the aforementioned operating time after the cyclic addition of the operating modes M6 and M7 are 26.8 kHz and 27.3 kHz, respectively, the mutual interference with the interactive signal of the corresponding operating frequency of 25.15 kHz can be avoided.

With the above arrangement, the signals of the interactive element and the display device 10 can be prevented from interfering with each other.

FIG. 5 is a flowchart of an operation method 200 according to an embodiment of the invention. Among them, the operation method 200 can be applied to display devices having the same or similar structure as that shown in FIG. 1. To make the description simple, the following will describe the operation method 200 according to an embodiment of the present invention, taking the display device 10 in Figure 1 as an example, but the present invention is not limited to this application.

In addition, it should be understood that the operations of the operation method 200 mentioned in this embodiment can be adjusted according to actual needs, and can even be executed simultaneously or partially, unless the sequence is specifically stated.

Furthermore, in different embodiments, these operations can also be added, replaced, and/or omitted adaptively.

In this embodiment, the operation method 200 includes the following operations.

In operation S1, the display device 10 senses an interactive signal of an interactive element through the sensing element SSR, wherein the interactive signal has an operating frequency.

In operation S2, the display device 10 controls the pixel circuit 106 to perform a display operation corresponding to a display frequency, wherein the display frequency is substantially different from the operating frequency of the interactive signal of the aforementioned interactive element.

The specific details of the above operations can be referred to the foregoing paragraphs, so they are not repeated here.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection of the present invention The scope shall be subject to those defined in the attached patent scope.

10: Display device

40: Gate driver

100: Controller

106: pixel circuit

SD: source driver

SSR: source driver

DL1-DL4: data line

GL1, GL2: gate line

G1, G2: gate signal

VD1-VD4: data voltage

XSTB, XSTB1, XSTB2: trigger signal

CLK: Clock signal

W1-W4: Waveform

TA-TE: Time

C1, C2: Curve

200: method

S1-S2: Operation

Figure 1 is a schematic diagram of a display device according to an embodiment of the present invention; Figure 2 is a waveform diagram drawn according to an operation example of this case; FIG. 3 is a schematic diagram of signal waveforms of the display device according to another operation example of this case; Figure 4 is a schematic diagram drawn according to an operation example of this case; and Fig. 5 is a flowchart of an operation method according to an embodiment of the present case.

200: method

S1-S2: Operation

Claims (9)

An operating method of a display device includes: sensing an interactive signal of an interactive element through a sensing element, wherein the interactive signal has an operating frequency; corresponding to a display frequency, controlling a plurality of pixel circuits to perform display operations, wherein the display The frequency is substantially different from the operating frequency; and calculating the complex time difference between the rising edge and the falling edge of a clock signal and a complex trigger signal corresponding to the display device; calculating the complex operating time according to the time difference; and corresponding to the operating time One of the corresponding frequencies is substantially the same as the operating frequency, and the adjustment corresponds to the display frequency. The operation method according to claim 1, wherein the display frequency is controlled based on a horizontal blanking value and is different from the operation frequency. The operation method according to claim 1, wherein the display frequency is controlled based on a vertical blanking value to be different from the operation frequency. The operation method according to claim 1, wherein the operation of adjusting the display frequency includes: adjusting the interval time of the trigger signals. The operation method according to claim 1, wherein the operation of calculating the operation time includes: cyclically adding the time differences to calculate the operation time. The operation method according to claim 1, wherein the corresponding frequency corresponding to the one of the operating times is substantially the same as the operating frequency, and adjusting the operation corresponding to the display frequency includes: corresponding to the operating time The one is within a time range corresponding to the operating frequency, and the adjustment corresponds to the display frequency. The operating method according to any one of claims 1-6, wherein when the operating frequency is approximately 25.15 kHz, the display frequency is approximately 26.8 kHz. A display device includes: a sensing element for sensing an interactive signal of an interactive element, wherein the interactive signal has an operating frequency; and a controller for controlling a plurality of pixel circuits corresponding to a display frequency to display Operation, wherein the display frequency is substantially different from the operation frequency; wherein the controller is further used to: calculate the complex time difference between the rising edge and the falling edge of a clock signal and a complex trigger signal corresponding to the display device; according to the time difference Calculate complex number operation time; and Adjusting the interval time of the trigger signals corresponding to one of the operating times is within a time range corresponding to the operating frequency. . The display device according to claim 8, wherein the controller is further used to control a horizontal shading value and/or a vertical shading value so that the display frequency is different from the operating frequency.

Images