TWI399721B - Display driving device , and display device - Google Patents

Description

Display drive device and display device

The present invention relates to a display device, and more particularly to a display driving device capable of reducing signal distortion and a display device including the same.

A flat panel display (FPD, "Flat panel display") is a display device different from a cathode ray tube (CRT, "cathode-ray tube"), and may include a liquid crystal display (LCD, "Liquid crystal display"), an organic light emitting diode Body (OLED, "Organic light emitting diode") and plasma display panel (PDP, "Plasma display panel").

In general, the display device can include a time controller, a data drive (or source drive), a scan drive (or brake drive), and a display panel.

As display panels become larger, display devices tend to use multiple data drivers to display images. That is, each data drive receives data from the time controller and outputs the received data to the display panel.

In some embodiments, the display driver includes a plurality of data drivers; and a time controller includes a data transfer unit. The data transmission unit transmits data to the data drive. The data transmission unit controls the electronic signal according to the difference in distance between each data driver and the data transmission unit, reduces distortion and/or power consumption of the electronic signal caused by the difference in distance, and transmits the controlled electronic signal, and the electronic signal corresponds to To this data.

The data transmission unit can perform pre-emphasis on the electronic signal according to the difference in distance, and the peak-to-peak voltage of the controlled electronic signal can increase as the distance difference increases.

In one embodiment, the data transfer unit can continue to transmit electronic signals to each data drive. In other embodiments, the data transfer unit can simultaneously transmit electronic signals to at least some of the data drives.

The time controller can include a time control unit configured to transmit the data and a drive address corresponding to the data, and the data transfer unit is configured to recognize the difference in distance based on the drive address.

The data transmission unit may include a plurality of pre-emphasis units respectively corresponding to the data drivers, which preset each pre-emphasis unit according to the distance difference. Additionally, the time controller can include a time control unit configured to transmit data to each of the pre-emphasis units.

Each data driver can include an equalization unit configured to equalize the transmitted electronic signal using a first equalization coefficient preset based on the distance difference.

In some embodiments, the display driver includes a time controller and a plurality of data drivers. Each data drive contains a first-class unit. The equalization unit uses an equalization coefficient preset to equalize the electronic signal transmitted by the time controller according to the difference in distance between each data driver and the time controller.

The time controller can control the electronic signal according to the difference of the distance between each data driver and the data transmission unit to reduce the electricity caused by the difference in distance. The sub-signal is distorted and/or consumes power and transmits a controlled electrical signal. The electronic signal corresponds to the data transmitted from the time controller.

The data transmission unit can perform pre-emphasis on the electronic signal according to the difference in distance.

In some embodiments, the display device includes a plurality of data drivers; a time controller includes a data transfer unit configured to transmit data to each of the data drives; and a scan driver configured to receive Scan data from this time controller. The data transmission unit controls the electronic signal according to the difference in distance between each data driver and the data transmission unit to reduce distortion and/or power consumption of the electronic signal caused by the difference in distance, and transmit the controlled electronic signal, and the electronic signal Corresponds to this information.

The display device may correspond to a liquid crystal display (LCD), an organic light emitting diode (OLED), or a plasma display panel (PDP).

The data transmission unit can perform pre-emphasis on the electronic signal according to the difference in distance.

Each data driver can include an equalization unit configured to equalize the transmitted electronic signal using a first equalization coefficient preset based on the distance difference.

In some embodiments, the display device includes a time controller, a plurality of data drivers, and a scan driver configured to receive scan data from the time controller. Each data driver may include an equalization unit configured to be equalized by using an equalization coefficient preset according to a difference in distance between each of the data driver and the time controller The electronic signal transmitted by the time controller.

The display device may correspond to a liquid crystal display (LCD), an organic light emitting diode (OLED), or a plasma display panel (PDP).

The time controller controls the electronic signal according to the difference in distance between each data driver and the data transmission unit to reduce the distortion and/or power consumption of the electronic signal caused by the difference in distance, and to transmit the controlled electronic signal. The electronic signal corresponds to the data transmitted from the time controller.

The data transmission unit can perform pre-emphasis on the electronic signal according to the difference in distance.

The specific embodiments of the present invention are only intended to be illustrative of the structure and function of the present invention, but the invention is not limited to the specific embodiments disclosed. It will be apparent to those skilled in the art that <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

The vocabulary used here should be understood as follows.

It will be understood that the terms "a", "an", """""""" Limited to these words. These terms are only used to distinguish one element, component, region, layer, or segment from another region, layer or section. Therefore, a first element, component, region, layer or section described below may be referred to as a second element, component, region, layer or section.

As used herein, the term "and/or" means any combination of the listed items and any individual items of its own. Thus, the "first, second and/or third item" includes not only the first, second or third item, but also any and all combinations of one or more of the first, second and third items.

It can be understood that when an element or layer is referred to as "connected" or "coupled" or "coupled" to another element or layer, it can be directly attached to, connected to, or coupled to other elements or layers. Or there are intermediate elements or layers. In contrast, when an element is referred to as being "directly on", "directly connected" or "directly coupled" to another element or layer, there is no intermediate element or layer. On the other hand, spatially related terms, such as "between" and "directly between" or "adjacent to" and "directly adjacent to", etc., are used herein to describe a component in the drawings. Or the relationship of features to other elements or features and should be interpreted in a similar manner.

In the following announcements, the singular elements "a", "an" and "the" are used in the plural. It will be further understood that the term "comprising" as used in this specification indicates the existence of the stated features, quantities, steps, operations, components, components and/or groups thereof, but does not exclude the presence or addition of one or more Other features, quantities, steps, operations, components, components, and/or groups thereof.

The order of execution of the steps of the present invention may vary unless explicitly defined in a particular order. That is, the steps can be performed in a specific order at the same time, or in reverse order.

All items (including technical and scientific terms) used herein are exactly the same as those skilled in the art to which the invention pertains, unless defined. I It will be further understood that the vocabulary defined in a general dictionary should be interpreted to be consistent with the scope of the related art and the specification, and is not idealized or over-interpreted unless explicitly defined therein.

The first figure is a block diagram illustrating a display device in accordance with an embodiment of the present invention.

Referring to the first figure, the display device 100 includes a time controller 110, a plurality of data drivers 120, a plurality of scan drivers 130, and a display panel 140.

For example, the display device 100 may correspond to a flat panel display (FPD) such as a liquid crystal display (LCD), an organic light emitting diode (OLED), or a plasma display panel (PDP).

For a general FPD, the time controller 110 can transmit data to each of the data drivers 120 and transmit the scan data to each of the scan drivers 130, and the display panel 140 is operated by the data drivers 120 and the scan drivers 130.

When the time controller 110 transmits an electronic signal to the data drive 120, the display device 100 controls the operation between the time controller 110 and the data drive 120 to reduce distortion and/or power consumption of the electronic signal. Distortion is caused due to the difference in distance between the time controller 110 and the data driver 120.

Hereinafter, the operation between the time controller 110 and the material drive 120 will be explained with reference to the drawings.

The second to fourth figures are diagrams illustrating the connection structure between the time controller and the data driver in the first figure.

In the second figure, the time controller 110 is independently connected to each of the data drivers 120a to 120h. In the third diagram, the time controller 110 is independently connected to each of the first group data drivers 120a to 120d and the second group material drivers 120e to 120h. In the fourth diagram, the time controller 110 is connected to all of the data drivers 120a to 120h at a time.

The time controller 110 may be provided with a 1:N connection structure (N is a natural number) having the data drivers 120a to 120h. For example, the second figure illustrates a 1:8 connection structure, the third diagram illustrates a 1:2 connection structure, and the fourth diagram illustrates a 1:1 connection structure.

On the other hand, although not necessary, the time controller 110 can transmit electronic signals to the individual data drivers 120a to 120h according to the physical structure between the time controller 110 and the data drivers 120a to 120h, as described with reference to the second figure. The description in the fourth figure.

When the time controller 110 is coupled to the data drivers 120a through 120h in the manner illustrated in the second or third figures, the time controller 110 can simultaneously or sequentially transmit electronic signals to at least some of the data drivers 120a through 120h. When the time controller 110 is connected to the data drivers 120a through 120h in the manner illustrated in the fourth diagram, the time controller 110 sequentially transmits electronic signals to each of the data drivers 120a through 120h.

The fifth figure is a block diagram illustrating a specific embodiment of the time controller in the first figure.

Referring to the fifth figure, the time controller 110 can include a time control unit 510 and a data transmission unit 520.

Similar to the time controller in the general FPD, the time controller 510 controls The data drive 120 and the scan driver 130 are used to display an image on the display panel 140.

The data transfer unit 520 can transmit the data to the data drive 120. When the time control unit 510 transmits the data to the data driver 120, the data transmission unit 520 can control the electronic signal corresponding to the data according to the difference in distance between the data driver 120 and the data transmission unit 520, and transmit the controlled electronic signal.

In particular, the time control unit 510 can transmit the data and the driver address corresponding to the data to the data transfer unit 520. The driver address can be used to simplify the circuitry within data transfer unit 520 and to identify data drivers 120a through 120h. The data transmission unit 520 can recognize the difference in distance between the data driver 120 and the data transmission unit 520 according to the driver address.

Hereinafter, the process of controlling the electronic signal in the data transmission unit 520 will be explained with reference to the sixth to seventh figures.

The sixth figure is a block diagram showing the data transmission unit in the fifth figure.

Referring to the sixth figure, the data transmission unit 520 can include a finite impulse response (FIR) filter 610, a mixer 620, and a summing unit 630. The data transmission unit 520 can perform pre-emphasis on the electronic signal according to the difference in distance between the data driver 120 and the data transmission unit 520.

The FIR filter 610 corresponds to a digital filter which depends on the current electronic signal SIG1 and the previous electronic signal SIG2 and compares the current electronic signal SIG1 with the previous electronic signal SIG2. When the current electronic signal SIG1 is at the same level as the previous electronic signal SIG2, the FIR filter 610 The electronic signal SIG3 of the normal level can be output. When the current electronic signal SIG1 is at a different level from the previous electronic signal SIG2, the FIR filter 610 can output the electronic signal SIG3 having a larger amplitude.

Mixer 620 can determine the amplitude of the electronic signal, depending on the driver address ADDR transmitted by time control unit 510. The summing unit 630 can add the current electronic signal SIG1 to the amplitude determined by the mixer 620.

The seventh figure is a diagram illustrating the output signal of the data transmission unit in the sixth diagram.

In the seventh diagram, the first portion 710 illustrates the pre-emphasis result of the electronic signal transmitted by the data transmission unit 520, and the second portion 720 illustrates the normal level of the electronic signal transmitted by the time control unit 510.

The magnitude of the first portion 710 depends on the driver address. In one embodiment, the peak-to-peak voltage VPP of the electronic signal increases as the difference in distance between the data transfer unit 520 and the data drive 120 increases.

For example, in the case of the first and second data drivers 120a and 120b, the first portion 710 may correspond to 125% of the second portion 720. In the case of the third data driver 120c, the first portion 710 may correspond to 110% of the second portion 720. In the case of the fourth data driver 120d, the first portion 710 can correspond to 105% of the second portion 720.

The eighth figure is a block diagram illustrating other specific embodiments of the time controller in the first figure.

Referring to the eighth figure, the time controller 110 can include a time control unit 810 and a data transmission unit 820.

The data transmission unit 820 can include a corresponding data driver 120a A plurality of pre-emphasis units 820a to 820h up to 120h. The distance between the data transmission unit 820 and the corresponding data driver 120 can be preset for each of the pre-emphasis units 820a to 820h. Additionally, the time control unit 810 can transmit the data to each of the pre-emphasis units 820a through 820h.

Since the time controller 110 of the eighth diagram is substantially the same as the time controller 110 of the fifth diagram except that the driver address is not used, a detailed explanation will be omitted herein.

When the time controller 110 of the fifth diagram is compared with the time controller 110 of the eighth diagram, the time controller 110 of the fifth diagram can simplify the hardware, and the time controller 110 of the eighth diagram increases the processing speed.

The ninth figure is a block diagram illustrating the data driver in the first figure.

Referring to the ninth figure, the data driver 120 can include an equalization unit 910 and a data driver unit 920.

The data driver 120 of the ninth diagram can be used separately from the time controller 110 shown in the fifth or eighth diagram, or in combination with the time controller 110 shown in the fifth or eighth diagram.

The equalization unit 910 equalizes the electronic signal using an equalization coefficient preset according to the difference in distance between the time controller 110 (or the data transmission unit 520 or 820) and the data driver 120.

In particular, when the data driver 120 of the ninth diagram is used separately from the time controller 110 shown in the fifth or eighth diagram, the equalization unit 910 can be based on the difference in distance between the time controller 110 and the data driver 120. Equalize the electrical signal. However, when the data driver 120 of the ninth diagram is used in combination with the time controller 110 shown in the fifth or eighth diagram, the equalization unit 910 The electronic signal can be equalized according to the difference in distance between the data transfer unit 520 or 820 and the data drive 120.

Data driver unit 920 generally performs the same operations as a data driver within a general FPD. In other words, the data driver unit 920 can transmit the data to the display panel 140.

The tenth figure is a diagram illustrating the equalization unit in the ninth figure.

Referring to the tenth diagram, the equalization unit 910 can include a delay unit 1010, an equalization coefficient unit 1020, and a summation unit 1030.

The delay unit 1010 can be implemented with a T second tag and can delay the signal input to the equalization unit 910. The equalization coefficient unit 1020 may preset an equalization coefficient and may amplify the signal output from the T second tag according to the equalization coefficient. The summing unit 1030 may add a signal amplified by the equalization coefficient unit 1020.

The equalization coefficient may be set according to the difference in distance between the time controller 110 (or the data transmission unit 520 or 820) and the data driver 120. Those of ordinary skill in the art can obtain appropriate equalization coefficients without undue experimentation.

As a result, the equalization unit 910 can equalize the electronic signal according to a preset equalization coefficient, thereby reducing electronic signal distortion and/or power consumption.

The display driving device according to a specific embodiment can reduce electronic signal distortion and/or power consumption, which is caused by a difference in distance between the time controller and each data driver.

While the present invention has been shown and described with respect to the embodiments of the present invention, it will be understood by those of ordinary skill in the art Multiple forms and details of the changes above.

100‧‧‧ display device

110‧‧‧ time controller

120‧‧‧Data Drive

130‧‧‧Scan Drive

140‧‧‧ display panel

120a-120h‧‧‧Data Drive

510‧‧‧Time Control Unit

520‧‧‧Data Transfer Unit

610‧‧‧ Finite impulse response filter

620‧‧‧ Mixer

630‧‧A total unit

710‧‧‧Part 1

720‧‧‧Part II

810‧‧‧Time Control Unit

820‧‧‧Data Transfer Unit

820a-820h‧‧‧Pre-reinforcement unit

910‧‧‧equalization unit

920‧‧‧Data Drive Unit

1010‧‧‧Delay unit

1020‧‧‧equalization coefficient unit

1030‧‧‧Additional unit

The first figure is a block diagram illustrating a display device in accordance with an embodiment of the present invention.

The second to fourth figures are diagrams illustrating the connection structure between the time controller and the data driver in the first figure.

The fifth figure is a block diagram illustrating a specific embodiment of the time controller in the first figure.

The sixth figure is a block diagram showing the data transmission unit in the fifth figure.

The seventh figure is a diagram illustrating the output signal of the data transmission unit in the sixth diagram.

The eighth figure is a block diagram illustrating other specific embodiments of the time controller in the first figure.

The ninth figure is a block diagram illustrating the data driver in the first figure.

The tenth figure is a diagram illustrating the equalization unit in the ninth figure.

100‧‧‧ display device

110‧‧‧ time controller

120‧‧‧Data Drive

130‧‧‧Scan Drive

140‧‧‧ display panel

Claims (18)

A display driving device comprising: a plurality of data drivers; and a time controller comprising a data transmission unit configured to transmit data to the data driver, wherein the data transmission unit is configured according to each of the data drivers A distance difference between the data transmission units controls an electronic signal corresponding to the data to reduce distortion and/or power consumption of the electronic signal caused by the difference in distance, and transmit the controlled electronic signal And the data transmission unit can perform pre-strengthening on the electronic signal according to the distance difference. The display driving device of claim 1, wherein a peak-to-peak voltage of the controlled electronic signal increases as the distance difference increases. The display driving device of claim 1, wherein the data transmission unit sequentially transmits the electronic signal to each of the data drivers. The display driving device of claim 1, wherein the data transmission unit simultaneously transmits the electronic signal to at least some of the data drivers. The display driving device of claim 1, wherein the time controller comprises: a time control unit configured to transmit the data and a driver address corresponding to the data; and the data transmission unit configured to According to the drive address identification The difference in distance. The display driving device of claim 1, wherein the data transmission unit comprises a plurality of pre-emphasis units respectively corresponding to the data driver, each pre-emphasis unit being preset according to a distance difference; and wherein the time controller A time control unit is included that is configured to transmit the data to each of the pre-emphasis units. The display driving device of claim 1, wherein each of the data drivers comprises an equalizing unit configured to equalize the transmitted electronic signal by using an equalization coefficient preset according to the distance difference . A display driving device comprises a time controller and a plurality of data drivers, wherein the display driving device comprises: wherein each data driver comprises an equalizing unit, and the equalizing unit is configured according to each of the data drivers and the time A distance difference between the controllers, using an equalization coefficient preset to equalize an electronic signal transmitted by the time controller. The display driving device of claim 8, wherein the time controller controls the electronic signal according to the distance difference between each of the data driver and a data transmission unit, the electronic signal corresponding to the time controller The transmitted data is used to reduce distortion and/or power consumption of the electronic signal caused by the difference in distance, and to transmit the controlled electronic signal. The display driving device of claim 9, wherein the data transmission unit can perform pre-strengthening on the electronic signal according to the distance difference. A display device comprising: a plurality of data drivers; a time controller comprising a data transfer unit configured to transmit data to each of the data drives; and a scan driver configured to receive from the time controller Scanning data, wherein the data transmission unit controls an electronic signal according to a distance difference between each of the data driver and the data transmission unit, the electronic signal corresponding to the data, to reduce the electronic signal caused by the difference in distance Distortion and/or power consumption, and transmission of the controlled electronic signal. The display device of claim 11, wherein the display device corresponds to a liquid crystal display, an organic light emitting diode or a plasma display panel. The display device of claim 11, wherein the data transmission unit can perform pre-strengthening on the electronic signal according to the distance difference. The display device of claim 11, wherein each of the data drivers comprises an equalization unit configured to equalize the transmitted electronic signals using an equalization coefficient preset according to the distance difference. A display device comprising: a time controller; a plurality of data drivers; and a scan driver configured to receive scan data from the time controller, wherein each of the data drivers includes an equalization unit, and the like The unit is configured to use an equalization coefficient preset to equalize an electronic signal transmitted by the time controller according to a distance difference between each of the data drivers and the time controller. The display device of claim 15, wherein the display device corresponds to a liquid crystal display, an organic light emitting diode or a plasma display panel. The display device of claim 15, wherein the time controller controls an electronic signal according to a distance difference between each of the data driver and the data transmission unit, the electronic signal corresponding to the data to reduce the distance The electronic signal is distorted and/or consumes power due to the difference, and the controlled electronic signal is transmitted. The display device of claim 15, wherein the data transmission unit can perform pre-strengthening on the electronic signal according to the distance difference.