CN105989789B - Method for transmitting data from time schedule controller, time schedule controller and display system - Google Patents

Abstract

The present invention relates to a method for transmitting data from a timing controller to a source driver, comprising: applying multiple data transmission rates to a discrete data transmission rate setting; using the multiple data transmission rates to transmit image data of multiple images respectively; and for each image, its corresponding image data is transmitted using only one of the multiple data transmission rates.

Description

Method for transmitting data from timing controller, timing controller and display system

technical field

The present invention relates to a display system, and more particularly, to a method for transmitting data from a timing controller to a source driver, and a related timing controller and display system.

Background technique

In a conventional P2P timing controller, image data is transmitted to multiple source drivers using a single data rate. However, using a single data rate for transmission will cause a large electromagnetic interference (EMI) peak. In addition, since the point-to-point timing controller uses a serializer/deserializer interface to transmit image data, and the data transfer rate is quite high (eg, greater than 1Gb/s), the traditional spread spectrum technique is relatively Difficult to apply in point-to-point timing controllers.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a method for transmitting data from a timing controller to a source driver, and a related timing controller and display system, which utilize different data transmission rates to transmit image data to effectively reduce electromagnetic interference peaks to solve the above problems .

According to one aspect of the present invention, a method of transmitting data from a timing controller to a source driver includes: applying a plurality of data rates to a discrete data rate setting; and using the plurality of data rates to transmit data separately Image data of a plurality of images, wherein for each image, its corresponding image data is transmitted using only one of the plurality of data transmission rates.

According to another aspect of the present invention, a timing controller of a display system is disclosed. The timing controller is used for applying a plurality of data transmission rates to a discrete data transmission rate setting, and using the plurality of data transmission rates to transmit image data of a plurality of images respectively, wherein for each image, its corresponding Image data is transmitted using only one of the plurality of data transfer rates.

Description of drawings

FIG. 1 is a schematic diagram of a display system according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of transmitting images using multiple data rates according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of an image format according to an embodiment of the present invention.

FIG. 4 is a flowchart of a method for transmitting data from a timing controller to a source driver according to an embodiment of the present invention.

Description of Drawing Symbols

100, 300 display system

110 Timing Controller

120 Display panel

124 Active Display Area

122_1 to 122_N source driver

400 to 404 steps

Detailed ways

Certain terms are used in the specification and claims to refer to particular elements. It should be understood by those skilled in the art that hardware manufacturers may refer to the same element by different nouns. The description and claims do not use the difference in name as a way to distinguish elements, but use the difference in function of the elements as a criterion for distinguishing. The "comprising" mentioned in the entire specification and claims is an open-ended term, so it should be interpreted as "including but not limited to". In addition, the word "coupled" herein includes any means of direct and indirect electrical connection. Therefore, if a first device is described as being coupled to a second device, it means that the first device can be directly electrically connected to the second device. two devices, or indirectly electrically connected to the second device through other devices or connecting means.

Referring to FIG. 1 , FIG. 1 is a schematic diagram of a display system 100 according to an embodiment of the present invention. As shown in FIG. 1, the display system 100 includes a timing controller 110 and a display panel 120, wherein the display panel 120 includes at least one source driver (in this embodiment, it is a plurality of source drivers 122_1 to 122_N) and An active display area 124 (the active display area 124 may also be referred to as an active array). In this embodiment, the timing controller 110 is a point-to-point timing controller, and the timing controller 110 uses serializer/deserializer interfaces to transmit image data to the source drivers 122_1 to 122_N, respectively, and the display system 100 is A liquid crystal display (LCD).

In the operation of the display system 100, first, the timing controller 110 applies a plurality of data transmission rates to a discrete data transmission rate setting, and then the timing controller 110 gradually receives image data of a plurality of frames, and transmit the (processed) image data of the multiple images to each of the source drivers 122_1 to 122_N using the multiple data transmission rates, wherein for each image (frame), its corresponding image data Transmission is performed using only one of the plurality of data transmission rates. Next, after receiving the image data from the timing controller 110 , the source drivers 122_1 to 122_N transmit the corresponding data to the data lines of the active display area 124 .

In detail, referring to FIG. 2 , FIG. 2 is a schematic diagram of transmitting images using the data transmission rates DR1 to DR3 according to an embodiment of the present invention. As shown in FIG. 2 , the timing controller 110 uses the data transmission rate DR1 to transmit the first image. The image data of the image F1 is sent to the source drivers 122_1 to 122_N, the image data of the second image F2 is transmitted to the source drivers 122_1 to 122_N using the data transmission rate DR2, and the image data of the third image F3 is transmitted using the data transmission rate DR3 to the source drivers 122_1 to 122_N, use the data transmission rate DR2 to transmit the image data of the fourth image F4 to the source drivers 122_1 to 122_N, and repeatedly use the data transmission rates DR1, DR2, DR3, DR2 to transmit the subsequent images respectively F5, F6, F7, F8 and so on, by using different data transmission rates to transmit image data, the peak of electromagnetic interference can be effectively reduced.

It should be noted that FIG. 2 is only an example, not a limitation of the present invention. For example, the number of data transfer rates is determined according to the designer's consideration, that is, the timing controller 110 can use two, four or five different data transfer rates to transmit image data; FIG. 2 shows any two phases The image data of adjacent images are respectively transmitted using different data transmission rates, however, in other embodiments, the image data of some adjacent images may be transmitted using the same data transmission rate, for example, using the data transmission rate DR1 is used to transmit the images F1 and F2 and F4 and F5, and the data transmission rate DR2 is used to transmit the images F3 and F6; and in other embodiments, the data transmission rate is not periodically used to transmit the image data of the images. These design changes should all belong to the protection scope of the present invention.

Referring to FIG. 3 , FIG. 3 is a schematic diagram of an image format of an image 300 according to an embodiment of the present invention. The image 300 includes active image data and inactive data. The active image data is used to display on the active display area 124 , which is the “third area” shown in FIG. 3 ; the inactive data is not displayed in the active display area 124 . , namely the vertical blanking interval (VBI) data represented by the “first area” in FIG. 3 , and the horizontal blanking interval ( horizontal blanking interval, HBI). In this embodiment, when the vertical blanking period data is ready to be transmitted to the source drivers 122_1 to 122_N, the timing controller switches the data transmission rate. In detail, when preparing to transmit the vertical blanking period data of the image 300 to the source driver, a microprocessor built in the timing controller 110 executes firmware coding to switch an oscillator frequency offset for switching for transmission The data transfer rate of the image data of the video 300 .

In addition, in this embodiment, for each image transmitted to the source drivers 122_1 to 122_N, the image data amount of the image is adjusted with reference to the data transmission rate used to transmit the image, wherein using a higher Images transmitted at high data transfer rates have larger data volumes. In detail, for each image, by referring to the data transfer rate of the image data used to transmit the image, the amount of inactive data in the image, such as the vertical blanking period data and/or the horizontal blanking The hidden data will increase or decrease accordingly.

Taking FIG. 2 as an example, assuming that the image size of the image data of each image input to the timing controller 110 is 2040*1100, the timing controller 110 will add four vertical blanking period data lines to the first image F1, that is, The image size of the first image F1 is 2044*1100, and the data transmission rate DR1 is used to transmit the first image F1; then, the timing controller 110 will add two vertical blanking period data lines to the second image F2, that is, The image size of the second image F2 is 2042*1100, and the data transmission rate DR2 is used to transmit the second image F2; then, the timing controller 110 will not adjust the data amount of the third image F3, that is, the image of the third image F3 The size is 2040*1100, and the data transmission rate DR3 is used to transmit the third image F3, and so on.

In another example, assuming that the image size of the image data of each image input to the timing controller 110 is 2040*1100, the timing controller 110 increases the horizontal blanking period data so that the image size of the first image F1 is 2040*1102, And use the data transmission rate DR1 to transmit the first image F1; then, the timing controller 110 will not adjust the second image F2, that is, the image size of the second image is 2040*1100, and use the data transmission rate DR2 to transmit the second image image F2; then, the timing controller 110 reduces the horizontal blanking period data so that the image size of the third image F3 is 2040*1098, and uses the data transmission rate DR3 to transmit the third image F3.

By switching the data transmission rate when preparing to transmit the VBI data, and adjusting the data amount of the VBI data of the image, the active display area 124 will not have flash points.

1 to 4 at the same time, FIG. 4 is a flowchart of a method for transmitting data from a timing controller to a source driver according to an embodiment of the present invention, and the process is as follows:

Step 400: The process starts.

Step 402: Apply multiple data rates to a discrete data rate setting.

Step 404 : Use the multiple data transmission rates to transmit image data of a plurality of images respectively, wherein for each image, its corresponding image data is only transmitted using one of the multiple data transmission rates.

To briefly summarize the present invention, in the present invention, the timing controller has a discrete data transmission rate setting, and the timing controller utilizes the plurality of data transmission rates to transmit image data of a plurality of images respectively. By utilizing the method for transmitting data from a timing controller to a source driver and the related timing controller and display system proposed by the present invention, electromagnetic interference peaks can be reduced.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the protection scope of the present invention.

Claims (17)

1. A method for transmitting data from a timing controller to a source driver includes:

applying a plurality of data transmission rates to a discrete data transmission rate setting;

transmitting image data of a plurality of images respectively by using the plurality of data transmission rates; and

wherein for each image, the corresponding image data is transmitted at only one of the plurality of data transmission rates,

for each image transmitted to the source driver, the data amount of the image data of the image is adjusted by referring to the data transmission rate of the image data for transmitting the image.

2. The method of claim 1, wherein the image data of any two adjacent pictures are transmitted using different data transmission rates, respectively.

3. The method of claim 1, wherein the step of transmitting the image data of the plurality of pictures respectively at the plurality of data transmission rates comprises:

the data transmission rates are periodically used to transmit the image data of the images.

4. The method of claim 1, wherein each image comprises active image data and inactive data, the active image data is used for displaying in an active display area of a display panel, and the inactive data is not displayed in the active display area of the display panel, and the step of adjusting the data amount of the image data of the image with reference to the data transmission rate for transmitting the image data of the image comprises:

for each image transmitted to the source driver, the data amount of the inactive data of the image is adjusted by referring to the data transmission rate of the image data for transmitting the image.

5. The method of claim 4, wherein the step of adjusting the amount of inactive data of the picture with reference to the data rate at which the image data of the picture is transmitted comprises:

for each image transmitted to the source driver, the data amount of the vertical blanking interval data and/or the horizontal blanking interval data of the image is adjusted by referring to the data transmission rate of the image data for transmitting the image.

6. The method of claim 1, wherein for any two pictures, the picture transmitted at the higher data rate has a larger data size.

7. The method of claim 1, wherein the timing controller is a point-to-point timing controller.

8. A time schedule controller of a display device, wherein the time schedule controller is used for transmitting data to a source driver, the time schedule controller applies a plurality of data transmission rates to a discrete data transmission rate setting; and the image data of a plurality of images are respectively transmitted by utilizing the plurality of data transmission rates, wherein for each image, the corresponding image data is transmitted by utilizing only one of the plurality of data transmission rates,

wherein for each image transmitted to the source driver, the timing controller adjusts a data amount of image data of the image with reference to a data transmission rate of the image data for transmitting the image.

9. The timing controller of claim 8, wherein the image data of any two adjacent pictures are transmitted separately using different data transmission rates.

10. The timing controller of claim 8, wherein the timing controller periodically transmits the image data of the plurality of pictures using the plurality of data transmission rates.

11. The timing controller of claim 8, wherein each picture comprises active picture data and inactive data, the active picture data is used to be displayed in an active display area of a display panel, and the inactive data is not displayed in the active display area of the display panel, and a data amount of the picture data of each picture transmitted to the source driver is adjusted with reference to a data transmission rate of the picture data for transmitting the picture.

12. The timing controller of claim 11, wherein for each picture transferred to the source driver, a data amount of vertical blank period data and/or horizontal blank period data of the picture is adjusted with reference to a data transfer rate of image data for transferring the picture.

13. The timing controller of claim 8, wherein the image transmitted at the higher data transmission rate has a larger data amount for any two images.

14. The timing controller of claim 8, wherein the timing controller is a point-to-point timing controller.

15. A display system, comprising:

a time sequence controller; and

at least one source driver;

wherein the timing controller is configured to apply a plurality of data transmission rates to a discrete data transmission rate setting, and to transmit image data of a plurality of images respectively using the plurality of data transmission rates, and wherein for each image, the corresponding image data is transmitted using only one of the plurality of data transmission rates,

wherein for each image transmitted to the source driver, the timing controller adjusts a data amount of image data of the image with reference to a data transmission rate of the image data for transmitting the image.

16. The display system of claim 15, wherein the image data of any two adjacent pictures are transmitted using different data transmission rates, respectively.

17. The display system of claim 15, wherein the timing controller periodically transmits the image data of the plurality of images to the source driver using the plurality of data transfer rates.

Images