Electronic equipment, chip and control method thereof
By introducing a low power consumption mode into the chip of the mobile terminal device, the touch circuit performs global scanning at the preset display time of the interval, solving the problem of high power consumption of the touch circuit in the prior art, and achieving the effect of extending the device standby and continuous working time.
Patent Information
- Application Number
- CN202411756173.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-05-06
AI Technical Summary
Without sacrificing the performance of the equipment, it is difficult for existing mobile terminal devices to effectively improve battery efficiency and extend standby and continuous working hours, especially the waste of power consumption when frequent scanning of touch displays.
By introducing a low power mode into the chip, the touch circuit performs a global scan at the preset display time of the interval, sleeps in the spare time, and wakes up only the power supply and clock when no touch events occur, reducing unnecessary power consumption.
It realizes that without affecting the user experience, significantly reduces the power consumption of the touch circuit, extends the standby time of the equipment and improves the battery usage efficiency.
Smart Images
Figure CN119937819A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of display technology, and in particular to an electronic device, a chip and a control method thereof. Background Art
[0002] With the rapid development of science and technology, display touch technology has become an indispensable and important part of contemporary electronic devices, especially in the field of portable mobile terminals, showing a wide range of application prospects. Such devices, such as smart phones, tablets and various wearable devices, generally use touch screens as the main human-computer interaction interface, which greatly improves user experience and operational convenience. Limited by the bottleneck of current battery technology, how to effectively improve battery efficiency and extend the standby and continuous working time of mobile terminals without sacrificing device performance has become an important issue that the industry needs to solve urgently.
[0003] At present, the human-computer interaction mode of mobile terminals is mainly realized through touch screens, which requires the touch system to be able to recognize the user's touch operation in real time and accurately to achieve a quick response to the command. In order to achieve this function, the touch circuit needs to continuously scan the touch screen to capture the user's operation intention. In this process, the power consumption of the touch circuit is directly related to the overall energy consumption of the mobile terminal, which in turn affects its usage time.
[0004] Most existing touch chips adopt a frame-by-frame scanning working mode, that is, regardless of whether the user performs a touch operation, the touch circuit will completely scan the entire touch display screen frame by frame. Although this scanning method can ensure the comprehensive capture of touch events, in many actual application scenarios, such as watching videos, frequent full-screen scanning will cause unnecessary power consumption and greatly reduce the battery life of the mobile terminal.
[0005] In order to solve the above problems, the existing technology has made many improvements to the touch circuit. However, with the advancement of technology, the traditional electronic devices that implement the display function and touch function by independent circuits and components no longer meet the market demand for miniaturization and lightness. Therefore, the TDDI (Touch and Display Driver Integration) technology that integrates the display circuit and the touch circuit into the same chip was born. With the emergence of this technology, the improvements made to the touch circuit in the existing technology to solve the above problems are no longer applicable.
[0006] Therefore, a new electronic device, chip and control method thereof are yet to be proposed to solve the battery life problem of electronic devices using the chip. Summary of the invention
[0007] In view of the above problems, an object of the present invention is to provide an electronic device, a chip and a control method thereof, so as to reduce the power consumption of a touch control circuit.
[0008] According to one aspect of the present invention, a chip control method is provided, wherein the chip comprises a display circuit and a touch circuit, the display circuit is used to perform display scanning on a touch display screen so that it displays an image, and the touch circuit is used to perform touch scanning on the touch display screen to obtain a touch sensing signal, wherein the control method comprises controlling the chip to enter a low power consumption mode, and in the low power consumption mode, controlling the touch circuit to enter a sleep state, and controlling the display circuit to perform display scanning on the touch display screen so that it displays an image frame by frame; and comparing the display time of the touch display screen with a preset display time, and when the display time of the touch display screen reaches the preset display time, performing a global scan of the touch display screen by the touch circuit to determine whether a touch event occurs, wherein before the touch circuit performs a global scan on the touch display screen, the touch circuit is also awakened.
[0009] Optionally, before the touch circuit performs a global scan on the touch display screen, the touch circuit is also awakened, including waking up the power supply and clock of the touch circuit when the display time of the touch display screen reaches the preset display time; or waking up the power supply and clock of the touch circuit for at least one display row before the display time of the touch display screen reaches the preset display time.
[0010] Optionally, after the touch display screen is globally scanned by the touch circuit to determine whether a touch event occurs, the method further includes waking up the microcontroller unit of the touch circuit when a touch event occurs, so that the touch circuit scans the touch display screen point by point, calculates the touch position and reports it; when no touch event occurs, the touch circuit is controlled to enter a sleep state again, and the display circuit is controlled to scan the touch display screen so that it displays the picture frame by frame.
[0011] Optionally, the preset display time is greater than one frame display time, and a unit of the preset display time is a display frame or a display line.
[0012] Optionally, before controlling the chip to enter the low power consumption mode, the method further includes acquiring an application scenario of the electronic device; and determining, according to the application scenario, whether the chip needs to enter the low power consumption mode.
[0013] Optionally, the preset display time is a fixed value; or the preset display time is set according to an application scenario of the electronic device.
[0014] Optionally, before controlling the touch circuit to enter a sleep state and controlling the display circuit to scan the touch display screen so that it displays images frame by frame, the method further includes controlling the touch circuit to globally scan the touch display screen and determining that no touch event occurs.
[0015] According to a second aspect of the present invention, a chip is provided, comprising a touch control circuit and a display circuit, wherein the chip is used to execute the control method as described above.
[0016] Optionally, the display circuit includes a counter, which is used to count the display time of the touch display screen after the touch circuit enters a sleep state, and after the count value reaches the preset display time, control the touch circuit to perform a global scan of the touch display screen and clear the count value.
[0017] According to a third aspect of the present invention, there is provided an electronic device, comprising a processor, a touch display screen and the chip as described above.
[0018] The electronic device, chip and control method provided by the present invention, in the low power consumption mode of the chip, the touch circuit performs a global scan on the touch display screen once every preset display time, and sleeps for the rest of the time, which can increase the sleep time of the touch circuit and reduce the power consumption of the touch circuit. In addition, when no touch event occurs, the touch circuit is only awakened by the power supply and clock each time, so that the power consumption of the touch circuit can be further reduced.
[0019] In a preferred embodiment, after the display circuit wakes up the touch circuit, it will also perform a display scan of at least one row. After the display scan of at least one row is completed, the touch circuit will perform a global scan of the touch display screen, thereby preparing the setup time in advance for the normal operation of the touch circuit, so that the chip can achieve flexible interaction between display and touch without affecting the user experience. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which: Figure 1 A schematic diagram of the structure of an electronic device according to an embodiment of the present invention is shown; Figure 2 A schematic diagram showing the operation of a chip in a low power consumption mode according to an embodiment of the present invention is shown; Figure 3 A schematic flow chart of a chip control method according to an embodiment of the present invention is shown. DETAILED DESCRIPTION
[0021] Various embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, the same elements or modules are represented by the same or similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale.
[0022] It should be understood that in the following description, a "circuit" may include a single or multiple combined hardware circuits, programmable circuits, state machine circuits, and / or elements capable of storing instructions executed by programmable circuits. When an element or circuit is said to be "connected to" another element or an element or circuit is said to be "connected between" two nodes, it may be directly coupled or connected to another element or there may be an intermediate element, and the connection between the elements may be physical, logical, or a combination thereof. Conversely, when an element is said to be "directly coupled to" or "directly connected to" another element, it means that there is no intermediate element between the two.
[0023] At the same time, certain words are used in this patent specification and claims to refer to specific components. It should be understood by those skilled in the art that hardware manufacturers may use different terms to refer to the same component. This patent specification and claims do not use differences in names as a way to distinguish components, but rather use differences in components' functions as the criteria for distinction.
[0024] In addition, it should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements defined by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.
[0025] Figure 1 A schematic structural diagram of an electronic device according to an embodiment of the present invention is shown.
[0026] See also Figure 1 The electronic device provided by the embodiment of the present invention includes a processor 100 , a chip 200 and a touch display screen (not shown in the figure). The chip 200 includes a display circuit 210 and a touch circuit 220 .
[0027] The processor 100 is used to detect the application scenario of the electronic device and control the working mode of the chip 200 according to the application scenario. The working mode of the chip 200 includes a normal mode and a low power mode. For example, the processor 100 controls the chip 200 to work in a normal mode in an application scenario with a high touch demand such as document information input, and controls the chip 200 to enter a low power mode in an application scenario with a low touch demand such as watching a video. For example, when the electronic device is a computer, the processor 100 is a host, and when the electronic device is a mobile phone, the processor 100 can be a main chip.
[0028] Optionally, the working mode of the chip 200 may not be controlled by the processor 100, but the chip 200 may determine whether to enter the low power consumption mode after obtaining the application scenario of the electronic device from the processor 100.
[0029] In the normal mode of the chip 200, the chip 200 divides a frame time into at least one subframe, and each subframe includes a display period and a touch period. Therefore, in the normal mode of the chip 200, a frame time is equal to the sum of a frame display time and a frame touch time. In the display period, the display circuit 210 performs a display scan on the touch display screen to display the image, and in the touch period, the touch circuit 220 performs a touch scan on the touch display screen to obtain a touch sensing signal, thereby determining whether a touch event occurs. Usually, the display period and the touch period of each subframe are the same.
[0030] After the chip 200 enters the low power mode, the touch circuit 220 enters the sleep state; the display circuit 210 performs display scanning on the touch display screen to display the images frame by frame, and compares the display time of the touch display screen with the preset display time. After the display time of the touch display screen reaches the preset display time, the touch circuit 220 performs a global scan on the touch display screen to determine whether a touch event occurs. The preset display time is greater than one frame display time.
[0031] If the touch circuit 220 determines that no touch event occurs, the chip 200 enters the low power mode again. Before the touch circuit 220 performs a global scan of the touch display screen, the power supply and clock of the touch circuit 220 need to be awakened (not shown in the figure).
[0032] It is understandable that the touch circuit 220 needs to wait for the power supply and clock to stabilize before performing a global scan of the touch display screen. In one embodiment of the present invention, the display circuit 210 directly stops the display scan after waking up the power supply and clock of the touch circuit 220, and the touch circuit 220 waits for the power supply and clock to stabilize before performing a global scan of the touch display screen. In another embodiment of the present invention, the display circuit 210 will continue to perform a display scan of at least one row after waking up the power supply and clock of the touch circuit 220, and stop the display scan after the display scan of at least one row is completed, and the touch circuit 220 performs a global scan of the touch display screen, so that the setup time can be prepared in advance for the normal operation of the touch circuit 220, so that the chip 200 can achieve flexible interaction between display and touch without affecting the user experience.
[0033] If the touch circuit 220 determines that a touch event occurs, the touch circuit 220 will wake up its microcontroller unit MCU (Microcontroller Unit) (not shown) to scan the touch display screen point by point, calculate the touch position, and report the touch position.
[0034] In summary, in the low power consumption mode of the chip 200, the chip 200 no longer divides a frame time into at least one subframe, and does not divide each subframe into a display period and a touch period, but allows the touch circuit 220 to perform a global scan of the touch display screen once every preset display time. Therefore, in part of the frame time, the chip 200 only performs display scanning.
[0035] The display circuit 210 includes a counter (not shown in the figure), which is used to count the display time of the touch display screen after the touch circuit 220 is dormant, and control the touch circuit 220 to perform a global scan of the touch display screen when the count value reaches the preset display time, and clear the count value. Optionally, the counter is also used to wake up the power supply and clock of the touch circuit 220 when the count value reaches the preset display time. Optionally, the counter is also used to wake up the power supply and clock of the touch circuit 220 for at least one display row before the count value reaches the preset display time.
[0036] Optionally, the preset display time is pre-stored in the counter.
[0037] Optionally, the preset display time is a fixed value.
[0038] Optionally, the counter stores a mapping table of preset display time and application scenarios of the electronic device.
[0039] Optionally, the counter selects a preset display time according to an application scenario of the electronic device. For example, when watching a video, the counter selects a first preset display time as the preset display time, and when reading a novel, the counter selects a second preset display time as the preset display time, and the second preset display time is less than the first preset display time.
[0040] Optionally, when the chip 200 enters the low power consumption mode, the touch circuit 220 may first perform a global scan of the touch display screen to determine whether a touch event occurs. If a touch event is determined to occur, corresponding operations are performed based on the touch content. If no touch event is determined to occur, the chip 200 performs operations after entering the low power consumption mode again.
[0041] Figure 2 A schematic diagram showing the operation of a chip in a low power consumption mode according to an embodiment of the present invention is shown.
[0042] join Figure 2 , VSYNC represents a display frame, HSYNC represents a display line, frame_num represents the order of the display frames, and line_num represents the order of the display lines. Taking the preset display time of 2 display frames as an example, in the low power consumption mode, the display circuit 210 wakes up the touch circuit 220 in the third display line of the display frame with a sequence number of 0 or an even number. It can be understood that the present invention does not specifically limit the length of the preset display time.
[0043] Optionally, the unit of the preset display time is a display frame, for example, 2 display frames. In each display frame, the display circuit 210 controls the touch display screen to display a frame of picture.
[0044] Optionally, the preset display time is measured in display lines, for example, 1.5 m (m represents the sum of display lines of a display frame) display lines. In each display line, the display circuit 210 controls the touch display screen to display a line of picture.
[0045] In the electronic device provided by the embodiment of the present invention, in the low power consumption mode of the chip, the touch circuit performs a global scan on the touch display screen once every preset display time, and sleeps for the rest of the time, which can increase the sleep time of the touch circuit and reduce the power consumption of the touch circuit. In addition, when no touch event occurs, the touch circuit is only awakened by the power supply and clock each time, so that the power consumption of the touch circuit can be further reduced.
[0046] Furthermore, compared to the normal mode of the chip, in which the full-screen display scan and point-by-point touch scan of the touch display screen need to be completed in time-sharing within one frame time, in the low power mode of the chip, on average, one full-screen display scan of the touch display screen and less than one global touch scan of the touch display screen need to be completed within one frame time. Therefore, in the low power mode of the chip, the average frame time can also be reduced and the refresh rate of the touch display screen can be improved.
[0047] Figure 3 A schematic flow chart of a chip control method according to an embodiment of the present invention is shown.
[0048] The control method includes steps S01-S07, which are used to reduce the power consumption of the chip.
[0049] In step S01, an application scenario of an electronic device is obtained.
[0050] The application scenarios of electronic devices are generally obtained from the processor.
[0051] In step S02, it is determined whether the chip enters the low power consumption mode. If yes, the chip is controlled to enter the low power consumption mode, and step S03 is executed in the low power consumption mode. If no, the process returns to step S01.
[0052] For example, the processor can determine whether the chip enters the low power mode according to the application scenario. The chip can also obtain the application scenario from the processor and determine whether it enters the low power mode according to the application scenario. For example, the chip enters the low power mode when the application scenario has a low touch demand (such as listening to books, watching videos, reading novels, etc.), and works in the normal mode when the application scenario has a high touch demand (such as document information input).
[0053] In step S03, the display circuit is controlled to scan the touch display screen so that it displays images frame by frame, and the touch circuit is controlled to enter a sleep state.
[0054] In step S04, the display time of the touch screen is compared with the preset display time, and it is determined whether the display time reaches the preset display time. If yes, step S05 is executed, otherwise, step S03 is returned. The display time of the touch screen refers to the display time of the touch screen after the touch circuit enters the sleep state.
[0055] There are many application scenarios for electronic devices. The preset display time of all application scenarios that require the chip to enter a low power consumption mode can be simply set to a fixed value, or the preset display time can be divided according to the application scenario, for example, the preset display time for watching videos is set to the first preset display time, and the preset display time for reading novels is set to the second preset display time, and the second preset display time is made smaller than the first preset display time. Among them, the preset display time is greater than one frame time, and the unit of the preset display time can be a display frame or a display line.
[0056] In step S05 , the touch control circuit is controlled to perform a global scan on the touch display screen.
[0057] Before step S05, the power supply and clock of the touch circuit are also awakened. The power supply and clock of the touch circuit can be awakened when the display time of the touch display screen reaches the preset display time, or the power supply and clock of the touch circuit can be awakened at least one display row before the display time of the touch display screen reaches the preset display time. By waking up the power supply and clock of the touch circuit at least one display row before the display time of the touch display screen reaches the preset display time, the establishment time can be prepared in advance for the normal operation of the touch circuit, thereby realizing flexible interaction between display and touch without affecting the user experience.
[0058] In step S06, it is determined whether a touch event occurs. If yes, step S07 is executed, otherwise, the process returns to step S03.
[0059] In step S07, the micro control unit of the touch control circuit is awakened, so that the touch control circuit scans the touch display screen point by point, calculates the touch position and reports it.
[0060] Optionally, in step S03, the display circuit is controlled to scan the touch display screen so that it scans the display screen frame by frame, and before the touch circuit is controlled to enter the sleep state, the method may further include: controlling the touch circuit to globally scan the touch display screen and determining whether a touch event occurs. If a touch event occurs, performing corresponding operations according to the touch content.
[0061] According to the embodiments of the present invention, as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. The scope of protection of the present invention shall be based on the scope defined by the claims of the present invention and their equivalents.
Claims
1. A chip control method, wherein: The chip includes a display circuit and a touch circuit, wherein the display circuit is used to perform display scanning on a touch display screen to display an image, and the touch circuit is used to perform touch scanning on the touch display screen to obtain a touch sensing signal, wherein the control method includes: Controlling the chip to enter a low power consumption mode, controlling the touch control circuit to enter a sleep state in the low power consumption mode, and controlling the display circuit to scan the touch control display screen so that it displays images frame by frame; and The display time of the touch display screen is compared with a preset display time, and when the display time of the touch display screen reaches the preset display time, the touch display screen is globally scanned by the touch control circuit to determine whether a touch event occurs, Wherein, before the touch control circuit performs a global scan on the touch display screen, the method further includes waking up the touch control circuit.
2. The control method according to claim 1, wherein: Before the touch control circuit performs a global scan on the touch control display screen, waking up the touch control circuit includes: When the display time of the touch display screen reaches the preset display time, waking up the power supply and clock of the touch circuit; or At least one display row before the display time of the touch display screen reaches the preset display time wakes up the power supply and clock of the touch circuit.
3. The control method according to claim 2, wherein: After the touch control circuit globally scans the touch control display screen to determine whether a touch control event occurs, the method further includes: When a touch event occurs, the microcontroller unit of the touch circuit is awakened, so that the touch circuit scans the touch display screen point by point, calculates the touch position and reports it; When no touch event occurs, the touch circuit is controlled to enter the sleep state again, and the display circuit is controlled to scan the touch display screen so that it displays pictures frame by frame.
4. The control method according to claim 1, wherein: The preset display time is greater than one frame display time, and the unit of the preset display time is a display frame or a display line.
5. The control method according to claim 1, wherein: Before controlling the chip to enter the low power consumption mode, the method further includes: Acquire an application scenario of the electronic device; It is determined according to the application scenario that the chip needs to enter a low power consumption mode.
6. The control method according to claim 1, wherein: The preset display time is a fixed value; or the preset display time is set according to an application scenario of the electronic device.
7. The control method according to claim 1, wherein: Before controlling the touch control circuit to enter a dormant state and controlling the display circuit to scan the touch control display screen so that the touch control display screen displays images frame by frame, the method further includes: The touch control circuit is controlled to globally scan the touch control display screen, and it is determined that no touch control event occurs.
8. A chip, comprising a touch control circuit and a display circuit, wherein the chip is used to execute the control method according to any one of claims 1 to 7.
9. The chip according to claim 8, wherein: The display circuit includes a counter, which is used to count the display time of the touch display screen after the touch circuit enters a sleep state, and control the touch circuit to perform a global scan on the touch display screen and clear the count value after the count value reaches the preset display time.
10. An electronic device comprising a processor, a touch display screen and the chip according to any one of claims 8 to 9.