TWI486839B - Touch display device - Google Patents

Description

Touch display device

The present invention relates to a display technology, and more particularly to a touch display device.

The touch display device has a conductive pattern that implements a touch function, and the conductive pattern is usually formed of a transparent conductive material such as indium tin oxide (ITO). However, in the process of forming the conductive pattern, such as laying ITO, etching ITO, etc., it is generally easy to cause unevenness in the flatness of the conductive pattern. As a result, the display display device operates unevenly when displayed, that is, the Mura phenomenon.

In view of this, it is necessary to provide a touch display device with uniform brightness.

A touch display device includes: a display panel for displaying a screen; and a touch device having a plurality of conductive patterns, the plurality of conductive patterns being disposed on the display panel, the plurality of conductive patterns being used for detecting Measuring the touch input, and correspondingly controlling the touch display device to perform a corresponding function according to the detected touch input; the image circuit, the image circuit outputs a plurality of image data; the sensor, the sensor detecting environment Light brightness, and output the detected ambient light brightness value; a driving circuit, the driving circuit receiving the plurality of image data output by the image circuit and the ambient light brightness value output by the ambient light sensor, and the driving circuit compensates the complex image according to the ambient light brightness value a gray scale of the corresponding image data in the data to compensate for the difference in brightness of the display screen caused by the unevenness of the flat conductive pattern, so that the display panel displays various points of the touch display device when displaying a single gray scale image The brightness is the same.

Compared with the prior art, the driving circuit of the touch display device corresponds to the gray level of the corresponding image data in the complex image data according to the ambient light brightness value detected by the sensor, so even if the touch The flatness of the conductive pattern in the control device is uneven, and the brightness of the touch display device is the same when the display panel displays a single grayscale image, thereby reducing the Mura phenomenon of the touch display device.

1‧‧‧Touch display device

10‧‧‧ display device

20‧‧‧ touch device

101‧‧‧Image Circuit

103‧‧‧Memory Circuit

105‧‧‧Sensor

107‧‧‧Drive circuit

109‧‧‧ display panel

110‧‧‧ gamma circuit

S1‧‧‧Image Data Sheet

S2‧‧‧ revised information sheet

S3‧‧‧Compensated image data sheet

201‧‧‧ conductive pattern

1 is a block diagram showing a preferred embodiment of a touch display device of the present invention.

FIG. 2 is a schematic perspective view of the touch display device shown in FIG. 1 .

FIG. 3 is a diagram showing image data, correction data, and compensated image data when the touch display device shown in FIG. 1 displays a predetermined single gray scale.

The invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1-2, FIG. 1 is a block diagram showing a preferred embodiment of a touch display device according to the present invention. FIG. 2 is a schematic perspective view of the touch display device shown in FIG. 1 . The touch display device 1 includes a display device 10 and a touch device 20 . The display device 10 is electrically connected to the touch device 20. The display device 10 is for displaying a picture. The touch device 20 is configured to detect a user's touch input and corresponding to the detected touch input. The touch display device 1 is controlled to perform corresponding functions, such as surfing the Internet, making a call, and the like. The touch display device 1 is, for example, a mobile phone, a tablet computer or the like.

The touch device 20 includes a plurality of conductive patterns 201 (see FIG. 2) that are disposed on the display device 10. The plurality of conductive patterns 201 are made of a transparent conductive material such as ITO. The plurality of conductive patterns 201 are used for detecting a touch input, and correspondingly controlling the touch display device 1 to perform a corresponding function according to the detected touch input. The touch device 20 is a capacitive or resistive touch device. The touch device 20 is formed on the light-emitting surface side of the display device 10 to form an external touch display device or integrated in the display device 10 to form an in-cell touch display device.

The display device 10 includes an image circuit 101, a sensor 105, a drive circuit 107, and a display panel 109. The image circuit 101, the drive circuit 107, and the display panel 109 are electrically connected in order. The sensor 105 is electrically connected to the drive circuit 107. The image circuit 101 outputs a plurality of image data, such as RGB three-primary data. The sensor 105 detects ambient light brightness and outputs the detected ambient light brightness value. The driving circuit 107 receives the complex image data output by the image circuit 101 and the ambient light brightness value output by the sensor 105. The driving circuit 107 compensates the complex image data according to the ambient light brightness value. The gray scale of the corresponding image data is used to compensate for the difference in brightness of the display screen caused by the unevenness of the flatness of the plurality of conductive patterns 201, so that the touch panel 1 is displayed when the display panel 109 displays a single gray scale screen. The brightness of the dots is the same. The display device 10 is, for example, a liquid crystal display device, an organic electroluminescence display device, or the like.

Preferably, the display device 10 further includes a storage circuit 103 electrically connected to the drive circuit 107. In the present embodiment, the memory circuit 103 is a separate component physically separated from the drive circuit 107. In other variant embodiments, The memory circuit 103 can also be integrated in the drive circuit 107. The storage circuit 103 pre-stores a plurality of sets of correction data and a brightness interval corresponding to each set of correction data, wherein the brightness intervals corresponding to the respective sets of correction data do not overlap each other. According to the ambient light brightness value, the driving circuit 107 searches for the brightness interval including the ambient light brightness value in the storage circuit 103, and retrieves the correction data corresponding to the found brightness interval to the received image. The data is grayscale compensated. In the present embodiment, the correction data is a gray scale compensation value of each image data.

Please refer to FIG. 3. FIG. 3 is a diagram showing the image data, the correction data, and the compensated image data when the touch display device 1 displays a predetermined single gray scale. The data in the table S1 is the image data output by the image circuit 101, the data in the table S2 is a set of correction data stored in the storage circuit 103, and the data in the table S3 is based on the correction in the table S2. The image data after the data is compensated for the image data in the table S1. For the sake of brevity, the image data and the correction data are represented by Arabic numerals in the tables S1, S2, and S3. In the display device 1, these Arabic numerals are actually expressed by binary numbers. The working principle of the touch display device 1 is as follows: the touch display device 1 displays a predetermined single gray scale (such as 75 gray scale) screen, and correspondingly, the image circuit 101 outputs the same image data (see Table S1). This drive circuit 107 is given. The driving circuit 107 receives the image data, and receives the ambient light brightness value output by the sensor 105, correspondingly searches for the brightness interval including the ambient light brightness value in the storage circuit 103, and retrieves the found brightness interval. Corresponding correction data (see Table S2). The driving circuit 107 performs a summation operation on the acquired correction data and the received image data to perform gray scale compensation on the corresponding image data to obtain compensated image data (see Table S3). The driving circuit 107 outputs the compensated image data to the display panel 109 to compensate for the unevenness of the plurality of conductive patterns 201 due to unevenness The brightness difference of the displayed screen is such that the brightness of each point of the touch display device 1 is the same when the display panel 109 displays a single gray scale screen.

Specifically, the correction data acquisition manner in the storage circuit 103 is: first, the image displayed by the touch display device 1 is separately captured by different imaging devices by an imaging device (not shown); The brightness of the image captured by the imaging device is separately analyzed to obtain correction data corresponding to different ambient light ranges.

The driving circuit 107 of the touch display device 1 corresponds to the gray level of the corresponding image data in the plurality of image data according to the ambient light brightness value detected by the sensor 105. Therefore, even the touch device 20 The flatness of the conductive pattern 201 is uneven, and the brightness of each point of the touch display device 1 is the same when the display panel 109 displays a single gray scale screen, thereby reducing the Mura phenomenon of the touch display device.

The present invention is not limited to the above embodiments. For example, the driving circuit 107 further includes a gamma circuit 110 that receives grayscale compensated image data and compensates the received grayscale image. The data is subjected to gamma correction, and the corrected image data is output to the display panel 109.

In other embodiments, the gamma circuit 110 receives the image data output by the image circuit 101 and performs gamma correction on the received image data. The driving circuit 107 further compensates the display screen caused by the unevenness of the flat conductive pattern 201 by compensating the gray scale of the corresponding image data in the gamma-corrected image data according to the ambient light luminance value. The difference in brightness is such that the brightness of each point of the touch display device 1 is the same when the display panel 109 displays a single grayscale screen.

The correction data may also be grayscale-compensated image data of the image data outputted by the image circuit 101, and the driving circuit 107 drives the display according to the corrected data acquired. The panel 109 is omitted to omit the above-described summation operation.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

1‧‧‧Touch display device

20‧‧‧ touch device

103‧‧‧Memory Circuit

107‧‧‧Drive circuit

110‧‧‧ gamma circuit

10‧‧‧ display device

101‧‧‧Image Circuit

105‧‧‧Sensor

109‧‧‧ display panel

Claims (9)

A touch display device includes: a display panel for displaying a screen; and a touch device having a plurality of conductive patterns, the plurality of conductive patterns being disposed on the display panel, the plurality of conductive patterns being used for Detecting the touch input, and correspondingly controlling the touch display device to perform a corresponding function according to the detected touch input; the image circuit, the image circuit outputs a plurality of image data; the sensor, the sensor detecting Ambient light brightness, and outputting the detected ambient light brightness value; and a driving circuit, the driving circuit receiving the plurality of image data output by the image circuit and the ambient light brightness value output by the ambient light sensor, And the driving circuit compensates the brightness difference of the display screen caused by the unevenness of the flatness of the plurality of conductive patterns by compensating the gray level of the corresponding image data in the plurality of image data, so that the driving circuit compensates When the display panel displays a single grayscale screen, the brightness of each point of the touch display device is the same. The touch display device of claim 1, wherein the touch display device further comprises a storage circuit, the storage circuit pre-storing a plurality of sets of correction data and a brightness interval corresponding to each set of correction data, wherein each group of correction data The corresponding brightness intervals do not overlap each other. According to the ambient light brightness value, the driving circuit searches for a brightness interval including the ambient light brightness value in the storage circuit, and retrieves the correction data corresponding to the found brightness interval. Grayscale compensation is performed on the received image data. The touch display device of claim 2, wherein the correction data is a grayscale compensation value of each image data, and the driving circuit respectively performs a summation operation on the acquired correction data and the received image data. To perform grayscale compensation on the corresponding image data. The touch display device of claim 2, wherein the correction data is image data after grayscale compensation of the image data, and the driving circuit drives the display panel according to the retrieved image data. The touch display device of claim 2, wherein the memory circuit is either integrated in the driver circuit or is a separate component physically separated from the memory circuit. The touch display device according to any one of claims 1 to 5, wherein the driving circuit comprises a gamma circuit, the gamma circuit receives the grayscale compensated image data, and compensates the received grayscale The image data is subjected to gamma correction, and the corrected image data is output to the display panel to compensate for the brightness difference of the display screen caused by the unevenness of the plurality of conductive patterns, so that the display panel is displayed. The brightness of each point of the touch display device is the same when a single gray scale screen is used. The touch display device according to any one of claims 1 to 5, wherein the driving circuit comprises a gamma circuit, the gamma circuit receiving image data output by the image circuit, and receiving the image The data is subjected to gamma correction, and the driving circuit further compensates the height of the corresponding conductive pattern in the plurality of conductive patterns by compensating the gray level of the corresponding image data in the gamma corrected image data according to the ambient light brightness value. The display screen brightness difference caused by the height of the other conductive patterns is different, so that the brightness of each point of the touch display device is the same when the display panel displays a single gray scale picture. The touch display device of claim 1, wherein the display panel is a liquid crystal display panel. The touch display device of claim 1, wherein the touch device is disposed on a side of the light emitting surface of the display panel or integrated in the display panel.