Panel driving device and panel driving method

Abstract

The invention provides a panel driving device and a panel driving method. The panel driving device is suitable for mutually integrating a substrate of a light emitting diode and an electromagnetic induction substrate into a substrate-integrated panel structure. The panel driving device comprises a timing signal controller and an electromagnetic induction controller. At the beginning of each display frame, the timing signal controller generates a frequency synchronization signal and provides the frequency synchronization signal to the electromagnetic induction controller. The timing signal controller performs one of disabling and enabling on the display work in a first time period according to the frequency synchronization signal, and performs the other of disabling and enabling on the display work in a second time period according to the frequency synchronization signal. The electromagnetic induction operation is not enabled during the enabling of the display operation.

Description

Technical Field

[0001] The present invention relates to a panel driving technology with electromagnetic induction function, and in particular to a panel driving device and a panel driving method. Background Art

[0002] At present, the input devices of consumer electronic products are mainly touch panels, and some products also use stylus as another input device. Operating electronic products with fingers is intuitive and convenient, but it may not be suitable for all occasions. If you need to input on a small electronic product panel or want to input content accurately, it is more convenient to use a stylus to write input. Stylus is often implemented using electromagnetic induction technology.

[0003] On the other hand, as panels become thinner and lighter, many devices installed on the panels are being studied in an integrated manner. Since the driving circuit of the backlight module on the panel is often driven by high voltage and pulse width modulation (PWM) signals, high voltage and PWM signals can easily interfere with nearby circuits due to coupling effects. Therefore, other electronic components are designed to be separated from the driving circuit of the backlight module to reduce interference. The electromagnetic induction substrate is an independent component and will not be integrated with other components, but it also somewhat hinders the thinness of the panel. Summary of the invention

[0004] The present invention is directed to a panel driving device and a panel driving method, which integrate a substrate carrying a mini light emitting diode with an electromagnetic induction substrate, and utilize a time-division multiplexing method to avoid interference between display and electromagnetic induction.

[0005] According to an embodiment of the present invention, a panel driving device is suitable for integrating a substrate of a light-emitting diode and an electromagnetic induction substrate into a panel structure of an integrated substrate. The panel driving device includes a timing signal controller and an electromagnetic induction controller. The electromagnetic induction controller is coupled to the timing signal controller. At the beginning of each display frame, the timing signal controller generates a frequency synchronization signal and provides the frequency synchronization signal to the electromagnetic induction controller, and the timing signal controller disables and enables one of the display operations in a first time period according to the frequency synchronization signal, and disables and enables the other of the display operations in a second time period, wherein the first time period and the second time period do not overlap each other; the electromagnetic induction controller enables and disables the electromagnetic induction operation in the first time period according to the frequency synchronization signal, and enables and disables the electromagnetic induction operation in the second time period, wherein during the period when the display operation is enabled, the electromagnetic induction operation will not be enabled, and during the period when the electromagnetic induction operation is enabled, the display operation will not be enabled.

[0006] According to an embodiment of the present invention, a panel driving method is suitable for integrating a substrate of a light-emitting diode and an electromagnetic induction substrate into a panel structure of an integrated substrate. The panel driving method comprises: generating a frequency synchronization signal at the beginning of each display frame, and providing the frequency synchronization signal to an electromagnetic induction controller; disabling or enabling a display operation in a first time period according to the frequency synchronization signal, and disabling or enabling the other of the display operation in a second time period, wherein the first time period and the second time period do not overlap; and enabling or disabling an electromagnetic induction operation in the first time period according to the frequency synchronization signal, and enabling or disabling the other of the electromagnetic induction operation in the second time period through the electromagnetic induction controller, wherein during the period when the display operation is enabled, the electromagnetic induction operation will not be enabled, and during the period when the electromagnetic induction operation is enabled, the display operation will not be enabled.

[0007] Based on the above, the panel driving device and panel driving method described in the embodiment of the present invention integrates the substrate carrying the mini light emitting diode and the electromagnetic sensing substrate and performs circuit layout together, thereby reducing the overall cost of the system and making the panel thinner. In addition, the embodiment of the present invention uses the timing synchronization signal sent by the timing controller as a reference so that the display work of the timing controller and the electromagnetic sensing work of the electromagnetic sensing controller do not run at the same time, thereby using time-division multiplexing to avoid interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic diagram of a panel structure according to an embodiment of the present invention;

[0009] Figure 2 is a schematic diagram of a panel driving device according to an embodiment of the present invention;

[0010] Figure 3 is a flow chart of a panel driving method according to an embodiment of the present invention;

[0011] Figure 4 FIG. 4 is a schematic diagram of signals corresponding to a panel and a panel driving device according to an embodiment of the present invention.

[0012] Description of Reference Numerals

[0013] 110A, 110B: Panel structure

[0014] 112: Liquid crystal display layer

[0015] 115:Mini Light Emitting Diode (LED) Layer

[0016] 116:Mini LED substrate

[0017] 117:Electromagnetic induction substrate

[0018] 118: Integrated substrate

[0019] 200: Panel drive device

[0020] 210: Timing signal controller

[0021] 230: LED driver

[0022] 240:Electromagnetic induction controller

[0023] S310-S350: Steps of the panel driving method

[0024] Vsync: frequency synchronization signal

[0025] Dframe1, Dframe2, Dframe3: display frame

[0026] TKN1, TKN2: Thickness

[0027] TDis1, TDis2, TEn1, TEn2: time period

[0028] ScanEN1: First enable period

[0029] ScanEN2: Second enable period DETAILED DESCRIPTION

[0030] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0031] Figure 1 is a schematic diagram of a panel structure according to an embodiment of the present invention. Figure 1 There are two panel structures 110A and 110B. Figure 1 There are two panel structures 110A and 110B. Figure 1 The panel structure 110A mainly includes a liquid crystal display layer 112, a mini light emitting diode (LED) layer 115, a mini LED substrate 116 for carrying mini LEDs, and an electromagnetic induction substrate 117. The user of this embodiment can add substrates or layers with other functions according to their needs. Figure 1The panel structure 110A is, for example, a touch sensing panel, etc. The electromagnetic induction substrate 117 is used to sense the approach, touch and distance of the stylus or the corresponding touch component, thereby realizing the information input of the stylus or the touch component. Since the mini LED substrate 116 and the electromagnetic induction substrate 117 are at different levels and are spaced apart from each other, there is less interference between the two. The thickness of the electromagnetic induction substrate 117 of the present embodiment is about 0.2 to 0.6 mm.

[0032] The embodiment of the present invention is to Figure 1 The mini LED substrate 116 and the electromagnetic induction substrate 117 in the panel structure 110A are integrated with each other and the circuit layout is performed together, so as to Figure 1 The mini LED substrate 116 and the electromagnetic induction substrate 117 in the panel structure 110A are integrated into Figure 1 The integrated substrate in the panel structure 110B, that is, two substrates are integrated into one substrate, thereby saving the thickness of one substrate, thereby reducing the overall cost of the system and making the panel thinner. Figure 1 The thickness TKN2 of the panel structure 110B will be less than Figure 1 The panel structure 110A has a thickness TKN1.

[0033] On the other hand, the embodiment of the present invention uses the frequency synchronization signal sent by the timing signal controller as a reference to prevent the display work of the timing signal controller and the electromagnetic induction work of the electromagnetic induction controller from running simultaneously, thereby avoiding interference by using time-division multiplexing. Figure 2 2 is a schematic diagram of a panel driving device 200 according to an embodiment of the present invention. The panel driving device 200 is suitable for connecting a substrate (eg, Figure 1 Mini LED substrate 116) and electromagnetic induction substrate (eg, Figure 1 The electromagnetic induction substrate 117) is integrated with each other to form an integrated substrate (eg, Figure 1 The panel structure (eg, Figure 1 Panel structure 110B).

[0034] Figure 2 The panel driving device 200 includes a panel structure 110B, a timing signal controller 210, and an electromagnetic induction controller 240. The timing signal controller 210 is used to control the panel structure 110B to perform display work. In some embodiments of the present invention, if the timing signal controller 210 is implemented by a touch / display integration (TDDI) chip, and the panel structure 110B has a touch panel layer, the display work described in this embodiment may also include a function of sensing finger touch.

[0035] The electromagnetic induction controller 240 can perform electromagnetic induction work through the integrated substrate in the panel structure 110B. This electromagnetic induction work is to sense the approach, touch and distance of the stylus or the corresponding touch component, so as to realize the information input of the stylus or the touch component. A synchronous communication path is established between the timing signal controller 210 and the electromagnetic induction controller 240 of this embodiment. For example, the electromagnetic induction controller 240 and the timing signal controller 210 are directly coupled to each other using a general purpose input and output (GPIO) pin, and the timing signal controller 210 uses this general purpose input and output pin to provide a frequency synchronization signal to the electromagnetic induction controller 240. Therefore, the timing signal controller 210 and the electromagnetic induction controller 240 can synchronize the frequencies of both parties using this frequency synchronization signal, thereby facilitating the planning of the display working time period controlled by the timing signal controller 210 and the electromagnetic induction working time period controlled by the electromagnetic induction controller 240.

[0036] The panel driving device 200 further includes a light emitting diode driver 230, which is coupled to the timing signal controller 230. The light emitting diode driver 230 is controlled by the timing signal controller 210 to perform the display operation of the panel driving device 200. The panel driving device 200 of this embodiment may also have components such as a motherboard, a central processing unit, etc. of a consumer electronic device (such as a tablet device, a notebook computer, a mobile phone). Figure 3 and Figure 4 Various embodiments consistent with the present invention are described in detail.

[0037] Figure 3 is a flow chart of a panel driving method according to an embodiment of the present invention. Figure 4 FIG. 4 is a schematic diagram of signals corresponding to a panel and a panel driving device according to an embodiment of the present invention. Figure 3 and Figure 4 can be Figure 2 The middle panel driving device 200 is implemented. To describe this embodiment in detail, Figure 3 Steps S310, S320 and S330 are performed by Figure 2 The timing signal controller 210 executes, Figure 3 Steps S340, S3450, and S370 are performed by Figure 2 The electromagnetic induction controller 240 executes.

[0038] Here is an explanation Figure 4 Previous row. Figure 4 The previous row of the display frame Dframe1, Dframe2 and Dframe3 presents a plurality of display frames. In this embodiment, each display frame has a time length of 8.33 milliseconds to display one picture.

[0039] Please also refer to Figure 2 , Figure 3and Figure 4 In step S310 , at the beginning of each display frame, the timing signal controller 210 generates a frequency synchronization signal Vsync and provides the frequency synchronization signal Vsync to the electromagnetic induction controller 240 .

[0040] The timing signal controller 210 disables or enables one of the display operations in a first time period according to the frequency synchronization signal Vsync, and disables or enables the other of the display operations in a second time period. The first time period and the second time period do not overlap with each other. Here, the timing signal controller 210 first disables the display operation as an example. In step S320, the timing signal controller 210 takes a silent period (i.e., time period TDis1) after generating the frequency synchronization signal Vsync as the first time period, and during the silent period (time period TDis1), the timing signal controller 210 disables the display operation. In step S330, after the silent period TDis1, the timing signal controller 210 enables the display operation in the second time period (i.e., time period TEn1), and completes the display operation before the display frame Dframe1 ends.

[0041] The electromagnetic induction controller 240 enables or disables the electromagnetic induction operation in the aforementioned first time period according to the frequency synchronization signal Vsync, and enables or disables the electromagnetic induction operation in the aforementioned second time period. During the period when the display operation controlled by the timing signal controller 210 is enabled, the electromagnetic induction operation controlled by the electromagnetic induction controller 240 will not be enabled. Moreover, during the period when the electromagnetic induction operation controlled by the electromagnetic induction controller 240 is enabled, the display operation controlled by the timing signal controller 210 will not be enabled. Specifically, in step S340, the electromagnetic induction controller 240 enables the electromagnetic induction operation during the electromagnetic induction operation period (i.e., time period TEn2) after obtaining the frequency synchronization signal Vsync. Moreover, the electromagnetic induction operation period (time period TEn2) and the silent period (time period TDis1) are the same time period. In step S350, after the electromagnetic induction operation period (time period TEn2), the electromagnetic induction controller 240 disables the electromagnetic induction operation in the second time period (ie, time period TDis2). After steps S330 and S350 are completed, the process returns to step S310.

[0042] In this way, the embodiment of the present invention uses the frequency synchronization signal Vsync sent by the timing signal controller 210 as a reference to prevent the display work of the timing signal controller 210 and the electromagnetic induction work of the electromagnetic induction controller 240 from running simultaneously, thereby avoiding interference by using time division multiplexing.

[0043] In order to make the induction frequency of electromagnetic induction work reach a reporting rate of more than 200 Hz, the electromagnetic induction controller 240 performs electromagnetic induction in the first enabling period ScanEN1 and the second enabling period ScanEN2 in sequence during the electromagnetic induction working period (time period TEn1), thereby achieving a reporting rate of approximately 240 Hz when the display timing is 120 Hz. In this embodiment, when the display timing is 120 Hz, each display frame Dframe1, Dframe2 and Dframe3 is 8.33 milliseconds, the first enable period ScanEN1 and the second enable period ScanEN2 are both 2.9 milliseconds (ms), the first time period (e.g., time period TDis1, TEn2) is 5.8 milliseconds, and the second time period (e.g., time period TEn1, TDis2) is 2.5 milliseconds. Those who apply this embodiment can adjust the length of the aforementioned time periods according to their needs. For example, the first time period can be set to between 3ms and 6.5ms. When the display timing is 60 Hz, each display frame Dframe1, Dframe2 and Dframe3 is 16.67 milliseconds.

[0044] In summary, the panel driving device and panel driving method described in the embodiment of the present invention integrate the substrate carrying the mini light emitting diode and the electromagnetic induction substrate and perform circuit layout together, thereby reducing the overall cost of the system and making the panel thinner. In addition, the embodiment of the present invention uses the frequency synchronization signal sent by the timing signal controller as a reference so that the display work of the timing signal controller and the electromagnetic induction work of the electromagnetic induction controller do not run at the same time, thereby using time-division multiplexing to avoid interference.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A panel driving device, characterized in that: The panel driving device is suitable for integrating the substrate of the light emitting diode and the electromagnetic induction substrate into a panel structure with integrated substrates, and the panel driving device comprises: a timing signal controller; and an electromagnetic induction controller, coupled to the timing signal controller, Wherein, at the beginning of each display frame, the timing signal controller generates a frequency synchronization signal and provides the frequency synchronization signal to the electromagnetic induction controller, The timing signal controller disables or enables the display operation in a first time period according to the frequency synchronization signal, and disables or enables the display operation in a second time period, wherein the first time period and the second time period do not overlap each other; The electromagnetic induction controller performs one of enabling and disabling the electromagnetic induction operation in the first time period according to the frequency synchronization signal, and performs the other of enabling and disabling the electromagnetic induction operation in the second time period, During the period when the display operation is enabled, the electromagnetic induction operation will not be enabled, and during the period when the electromagnetic induction operation is enabled, the display operation will not be enabled.

2. The panel driving device according to claim 1, characterized in that: The timing signal controller generates the frequency synchronization signal and then passes through a silent period as the first time period, and during the silent period, the timing signal controller disables display operation, and, After the silent period, the timing signal controller enables the display operation in the second time period and completes the display operation before the display frame ends.

3. The panel driving device according to claim 2, characterized in that: The electromagnetic induction controller enables electromagnetic induction operation during an electromagnetic induction operation period after obtaining the frequency synchronization signal, and the electromagnetic induction operation period and the silent period are the same time period, After the electromagnetic induction working period, the electromagnetic induction controller disables the electromagnetic induction.

4. The panel driving device according to claim 3, characterized in that: The electromagnetic induction controller performs the electromagnetic induction in a first enabling period and a second enabling period sequentially during the electromagnetic induction operation period.

5. The panel driving device according to claim 4, characterized in that: The electromagnetic induction controller and the timing signal controller are directly coupled to each other by using universal input and output pins, and the timing signal controller provides the frequency synchronization signal to the electromagnetic induction controller by using the universal input and output pins.

6. The panel driving device according to claim 1, characterized in that: Also includes: The light emitting diode driver is coupled to the timing signal controller and is controlled by the timing signal controller to perform the display operation.

7. A panel driving method, characterized in that: The panel driving method is suitable for integrating a substrate of a light emitting diode and an electromagnetic induction substrate into a panel structure of an integrated substrate. The panel driving method comprises: At the beginning of each display frame, a frequency synchronization signal is generated and provided to the electromagnetic induction controller; disabling or enabling a display operation in a first time period according to the frequency synchronization signal, and disabling or enabling the other of the display operation in a second time period, wherein the first time period and the second time period do not overlap; and The electromagnetic induction controller enables or disables the electromagnetic induction operation in the first time period according to the frequency synchronization signal, and enables or disables the electromagnetic induction operation in the second time period. During the period when the display operation is enabled, the electromagnetic induction operation will not be enabled, and during the period when the electromagnetic induction operation is enabled, the display operation will not be enabled.

8. The panel driving method according to claim 7, characterized in that: The steps of disabling or enabling a display operation in a first time period according to the frequency synchronization signal, and disabling or enabling the other of the display operation in a second time period include: After the frequency synchronization signal is generated, a silent period as the first time period passes, and display operation is disabled during the silent period; After the silent period, the display operation is enabled in the second time period, wherein the display operation is completed before the display frame ends.

9. The panel driving method according to claim 8, characterized in that: The steps of enabling or disabling the electromagnetic induction operation in the first time period by the electromagnetic induction controller according to the frequency synchronization signal, and enabling or disabling the electromagnetic induction operation in the second time period include: enabling electromagnetic induction operation during an electromagnetic induction operation period after obtaining the frequency synchronization signal through the electromagnetic induction controller, wherein the electromagnetic induction operation period and the silent period are the same time period; and After the electromagnetic induction operation period has elapsed, the electromagnetic induction operation is disabled in the second time period by the electromagnetic induction controller.

10. The panel driving method according to claim 8, characterized in that: Also includes: The electromagnetic induction controller performs the electromagnetic induction operation in a first enabling period and a second enabling period in sequence during the electromagnetic induction operation period.

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