Display system and method with electromagnetic resistance

Abstract

The invention provides a display system and method with electromagnetic tolerance, and the display system comprises a programmable gamma circuit which dynamically provides a programmable gamma voltage curve so as to provide a gamma voltage; the time schedule controller is used for receiving the image data and converting the format of the received image data so as to generate a data signal; and the source driver receives the data signal from the time schedule controller and receives the gamma voltage from the programmable gamma circuit. When the data signal is received correctly, the source driver sends a notification signal to the time schedule controller which indicates that the data signal is not received correctly, and the time schedule controller programs the programmable gamma circuit in a preset time interval so as to provide an offset voltage level to a binding point of the programmable gamma circuit.

Description

Technical Field

[0001] The present invention belongs to the technical field of display technology, and more particularly to a display system and method with electromagnetic susceptibility (EMS). Background Art

[0002] A portable computer (e.g., a notebook computer or laptop) is a small, portable personal computer that typically has a flat screen (e.g., a liquid crystal display (LCD) panel) in an upper cover and an alphanumeric keyboard and a pointing device (e.g., a trackpad or trackpoint) in a lower cover.

[0003] Electromagnetic interference (EMI) is unwanted noise or interference in electrical paths or circuits caused by external sources, such as mobile phones. EMI can cause electronic devices to malfunction, malfunction, or stop working altogether. Portable computers are not immune to EMI and can be affected by it.

[0004] Electromagnetic interference may cause a (water) ripple phenomenon or a V-band effect on the gamma voltage (used as a reference voltage) of the liquid crystal display panel, thereby affecting the grayscale display and the white balance of the liquid crystal display panel.

[0005] Therefore, there is an urgent need to propose a novel mechanism to resist electromagnetic interference, especially to prevent or reduce the (water) ripple phenomenon or V-stripe effect caused by electromagnetic interference. Summary of the invention

[0006] The present invention provides a display system and method with electromagnetic tolerance to at least solve one of the above problems.

[0007] In view of the above, one of the purposes of the embodiments of the present invention is to provide a display system and method, which can work normally under electromagnetic interference (EMI) and effectively prevent or reduce the (water) ripple phenomenon or V-stripe effect caused by EMI.

[0008] The present invention provides a display system with electromagnetic tolerance, the display system comprising a programmable gamma circuit, a timing controller and a source driver. The programmable gamma circuit dynamically provides a programmable gamma voltage curve to provide a gamma voltage. The timing controller receives image data and converts the format of the received image data to generate a data signal. The source driver receives the data signal from the timing controller, and receives the gamma voltage from the programmable gamma circuit. The source driver sends a notification signal to the timing controller, indicating that the data signal is not correctly received, and the timing controller programs the programmable gamma circuit within a preset time interval to provide an offset voltage level to the binding point of the programmable gamma circuit.

[0009] The present invention also provides a display method with electromagnetic tolerance, which includes the following steps: determining whether electromagnetic interference exists; when electromagnetic interference exists, the source driver sends a notification signal to the timing controller; and after receiving the notification signal, the timing controller programs the programmable gamma circuit within a preset time interval to provide an offset voltage level to the binding point of the programmable gamma circuit.

[0010] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Through the above technical solution, the present invention has at least one of the following advantages and beneficial effects:

[0011] 1. The present invention provides a display system with electromagnetic tolerance, which includes a programmable gamma circuit, a timing controller and a source driver. The programmable gamma circuit dynamically provides a programmable gamma voltage curve to provide a gamma voltage. The timing controller receives image data and converts the format of the received image data to generate a data signal. The source driver receives the data signal from the timing controller and receives the gamma voltage from the programmable gamma circuit. The source driver sends a notification signal to the timing controller, indicating that the data signal is not correctly received, and the timing controller programs the programmable gamma circuit within a preset time interval to provide an offset voltage level to the binding point of the programmable gamma circuit. The present invention provides a display system with electromagnetic tolerance that can work normally under electromagnetic interference (EMI), and can effectively prevent or reduce the (water) ripple phenomenon or V-stripe effect caused by electromagnetic interference.

[0012] 2. The present invention also provides a display method with electromagnetic tolerance, the display method comprising the following steps: determining whether electromagnetic interference exists; when electromagnetic interference exists, the source driver sends a notification signal to the timing controller; and after receiving the notification signal, the timing controller programs the programmable gamma circuit within a preset time interval to provide an offset voltage level to the binding point of the programmable gamma circuit. The present invention provides a display method with electromagnetic tolerance that can work normally under electromagnetic interference (EMI), and can effectively prevent or reduce the (water) ripple phenomenon or V-stripe effect caused by electromagnetic interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The block diagram of the display system with electromagnetic tolerance according to the embodiment of the present invention is applicable to a computer.

[0014] HTP240184CNPage 3 / 9

[0015] Figure 2 Flow chart showing a method for displaying electromagnetic tolerance, applicable to Figure 1 display system.

[0016] Figure 3A A portion of a programmable gamma circuit is shown, with ground AGND (and power supply AVDD) affected by electromagnetic interference.

[0017] Figure 3B A simplified circuit showing a programmable gamma circuit and some tie points.

[0018] [Explanation of symbols]

[0019] 100: Display system

[0020] 10: Base

[0021] 11: LCD panel

[0022] 12: Programmable Gamma Circuit

[0023] 13: Timing controller

[0024] 131: Communication interface

[0025] 14: Source driver

[0026] 141: Clock and data recovery circuit

[0027] 200: Display method

[0028] 21: Determine if electromagnetic interference exists

[0029] 22: Send notification signal

[0030] 23: Increase the amplitude of the data signal

[0031] 24: Programming the Programmable Gamma Circuit

[0032] 25: Determine whether the preset time interval has been reached

[0033] I2C: Integrated Circuit

[0034] AVDD: Power supply

[0035] AGND: Ground

[0036] GND: Ground

[0037] V12, V7, HAVDDI N, V6, V1: Binding point DETAILED DESCRIPTION

[0038] The following will describe multiple embodiments of the present invention with reference to the accompanying drawings. For the purpose of clarity, many practical details will be described together in the following description. However, it should be understood that these practical details should not be used to limit the present invention. That is, in some embodiments of the present invention, these practical details are not necessary. In addition, in order to simplify the drawings, some conventional structures and elements will be depicted in a simple schematic manner in the drawings; and repeated elements may be represented by the same number.

[0039] Figure 1 The block diagram of the display system 100 with electromagnetic susceptibility (EMS) according to an embodiment of the present invention is applicable to a computer (eg, a portable computer such as a notebook computer or a laptop computer). Figure 2 A flowchart of a display method 200 showing electromagnetic tolerance may be applied to Figure 1 The display system 100 can work normally under electromagnetic interference (EMI), which is interference caused by electromagnetic induction or electromagnetic radiation emitted by an external source (such as a mobile phone) to the display system 100. In particular, the display method 200 of this embodiment can effectively prevent or reduce the (water) ripple phenomenon or V-band effect caused by electromagnetic interference such as mobile phones.

[0040] In the present embodiment, the display system 100 may include a liquid crystal display (LCD) panel 11, which is composed of liquid crystals and is electronically modulated to pass or block light. The display system 100 may include a programmable gamma circuit 12 (e.g., an integrated circuit) disposed on a substrate 10 (e.g., a printed circuit board or PCB) to provide a programmable gamma voltage curve to provide a gamma voltage (as a reference voltage) to affect the grayscale display and color white balance of the liquid crystal display panel 11. Since the human eye's perception of light is not linear, the gamma voltage curve is not a linear curve. The programmable gamma circuit 12 of the present embodiment provides a gamma voltage curve that can dynamically adjust the grayscale, so that the display image of the liquid crystal display panel 11 is more consistent with the human eye's perception of light.

[0041] The display system 100 of the present embodiment may include a timing controller (Tcon) 13, such as an integrated circuit, disposed on a substrate 10 (such as a printed circuit board), for receiving image data and converting the format of the received image data to generate an (image) data signal. The timing controller 13 of the present embodiment may include a communication interface 131, such as a serial communication interface (such as an integrated circuit (I nter-integrated circuit or I 2C), for programming the programmable gamma circuit 12.

[0042] The display system 100 of this embodiment may include a source driver (SD) 14 disposed on a substrate 10 (eg, a printed circuit board) for receiving a data signal (from a timing controller 13) and displaying it on a liquid crystal display panel 11, and receiving a gamma voltage (from a programmable gamma circuit 12).

[0043] See also Figure 2 In step 21, it is determined whether there is electromagnetic interference. When the source driver 14 fails to receive a stable data signal (eg, a data signal with a proper amplitude) from the timing controller 13, it is determined that there is electromagnetic interference.

[0044] If there is electromagnetic interference, the source driver 14 sends a notification (or feedback) signal (to the timing controller 13) indicating that the data signal is not correctly received (step 22); otherwise, the process returns to step 21. In one embodiment, the source driver 14 may include a clock and data recovery (CDR) circuit 141 for generating the notification signal. It is worth noting that electromagnetic interference may also cause an unlocking phenomenon between the timing controller 13 and the source driver 14.

[0045] Figure 3AThe part of the programmable gamma circuit 12 is shown, and its ground AGND (and power supply AVDD) are affected by electromagnetic interference. Figure 3B The simplified circuit of the programmable gamma circuit 12 and some binding points are shown. It is worth noting that the ground GND affected by electromagnetic interference will also affect the binding points (e.g. Figure 3B The gamma voltages at V12, V7, HAVDDI N, V6 and V1 are shown as examples. Therefore, the gamma voltages at the tie points close to the ground GND cannot be distinguished, resulting in a (water) ripple phenomenon or V-band effect.

[0046] Next, in step 23, after receiving the notification signal, the timing controller 13 increases the amplitude of the data signal and then retransmits the data signal to the source driver 14. According to one of the features of this embodiment, in step 24, the timing controller 13 programs the programmable gamma circuit 12 via the communication interface 131 (e.g., integrated circuit I2C). Specifically, the timing controller 13 outputs a code to the programmable gamma circuit 12 via the communication interface 131 to provide an offset voltage level (e.g., 1 volt) to the binding point (e.g., Figure 3B Examples include V12, V7, HAVDDI N, V6 and V1).

[0047] In step 25, a counter (inside the timing controller 13) counts until the counter reaches a preset time interval (eg, in the range of 30 seconds to 1 minute), at which time the process returns to step 21 for normal operation.

[0048] According to the above embodiment, especially the execution of step 24, the (water) ripple phenomenon or V-stripe effect caused by electromagnetic interference can be effectively prevented or alleviated.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of the patent application of the present invention; any other equivalent changes or modifications that do not deviate from the spirit disclosed by the invention should be included in the scope of the patent application below.

Claims

1. A display system with electromagnetic tolerance, characterized in that: include: a programmable gamma circuit dynamically providing a programmable gamma voltage curve to provide a gamma voltage; a timing controller, receiving the image data and converting the format of the received image data to generate a data signal; and a source driver receiving the data signal from the timing controller and receiving the gamma voltage from the programmable gamma circuit; The source driver sends a notification signal to the timing controller, indicating that the data signal is not correctly received, and the timing controller programs the programmable gamma circuit within a preset time interval to provide an offset voltage level to the binding point of the programmable gamma circuit.

2. The display system according to claim 1, characterized in that: Also includes: A liquid crystal display panel displays the data signal received from the timing controller on the liquid crystal display panel.

3. The display system according to claim 1, characterized in that: The timing controller includes a communication interface for programming the programmable gamma circuit.

4. The display system according to claim 3, characterized in that: The communication interface includes an integrated circuit.

5. The display system according to claim 1, characterized in that: The source driver includes a clock and data recovery circuit for generating the notification signal.

6. The display system according to claim 1, characterized in that: Also includes: A substrate is used to dispose the programmable gamma circuit, the timing controller and the source driver.

7. The display system according to claim 6, characterized in that: The substrate comprises a printed circuit board.

8. The display system according to claim 1, characterized in that: When the source driver fails to receive a stable data signal from the timing controller, it is determined that electromagnetic interference exists.

9. The display system according to claim 1, characterized in that: After receiving the notification signal, the timing controller increases the amplitude of the data signal and then retransmits the data signal to the source driver.

10. The display system according to claim 1, characterized in that: A counter is used to count until the counter reaches the preset time interval.

11. A display method with electromagnetic tolerance, characterized in that: include: Determine if electromagnetic interference exists; When electromagnetic interference exists, a source driver sends a notification signal to a timing controller; and After receiving the notification signal, the timing controller programs a programmable gamma circuit within a preset time interval to provide an offset voltage level to a binding point of the programmable gamma circuit.

12. The display method according to claim 11, characterized in that: When the source driver fails to receive a stable data signal from the timing controller, it is determined that electromagnetic interference exists.

13. The display method according to claim 11, characterized in that: Also includes: After receiving the notification signal, the timing controller increases the amplitude of the data signal and then retransmits the data signal to the source driver.

14. The display method according to claim 11, characterized in that: The timing controller programs the programmable gamma circuit via a communication interface.

15. The display method according to claim 11, characterized in that: A counter is used to count until the counter reaches the preset time interval.

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