KR20090060473A - Display apparatus and method for controlling power - Google Patents

Display apparatus and method for controlling power Download PDF

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Publication number
KR20090060473A
KR20090060473A KR1020070127292A KR20070127292A KR20090060473A KR 20090060473 A KR20090060473 A KR 20090060473A KR 1020070127292 A KR1020070127292 A KR 1020070127292A KR 20070127292 A KR20070127292 A KR 20070127292A KR 20090060473 A KR20090060473 A KR 20090060473A
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KR
South Korea
Prior art keywords
display module
power
power sequence
sequence information
type
Prior art date
Application number
KR1020070127292A
Other languages
Korean (ko)
Inventor
박원근
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020070127292A priority Critical patent/KR20090060473A/en
Publication of KR20090060473A publication Critical patent/KR20090060473A/en

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/63—Generation or supply of power specially adapted for television receivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2370/00—Aspects of data communication
    • G09G2370/14—Use of low voltage differential signaling [LVDS] for display data communication

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The present invention relates to an image display device, and more particularly, to automatically adjust a power sequence according to whether a display module is changed.

That is, the present invention extracts power sequence information according to the type of the display module currently connected according to whether the module is changed to drive the display module, and if the power sequence information does not exist, corresponding power sequence information from the display module. After receiving the update to the memory and apply the power sequence according to it, it is possible to drive the display module.

Accordingly, the image display device and the power control method according to the present invention automatically apply the power sequence according to the type of the module currently connected according to whether the module is changed, and drive the corresponding module, thereby separately matching the power sequence according to the module change. It solves the inconvenience of setting and does not need separate management according to the difference of module, which contributes to securing module reliability.

Description

Display apparatus and method for controlling power

The present invention relates to an image display device, and more particularly, to automatically adjust a power sequence according to whether a display module is changed.

In general, a plasma display panel (PDP: abbreviated as PDP) is a display device using visible light generated from a phosphor when vacuum ultraviolet rays generated by gas discharge excite the phosphor. Compared to the cathode ray tube, which has been the dominant display device, it is thin and light, and has the advantage of being able to realize a high-definition large screen, and the PDP is composed of a plurality of discharge cells arranged in a matrix, and one discharge The cells form one pixel of the screen.

When the structure of the PDP is schematically described, the upper plate and the lower plate are bonded to each other. The upper plate includes a scan electrode and a sustain electrode formed in parallel with each other, and a dielectric layer and a protective layer formed on the upper plate including the scan electrode and the sustain electrode.

The lower plate is provided with an address electrode, a dielectric film formed on the entire surface of the substrate including the address electrode, a partition formed on the dielectric film between the address electrodes, and phosphors on the partition walls and the dielectric film surfaces in each discharge cell. In addition, the space between the upper plate and the lower plate is filled with a discharge gas mixed with an inert gas such as helium (He) and xenon (Xe) to form a discharge region.

In such a PDP, the discharge gas is discharged when a predetermined voltage is applied to the electrodes, and the phosphor is excited by the generated ultraviolet rays, thereby realizing color. Therefore, a module driving unit for controlling the driving of the PD module so that a predetermined voltage is applied to the electrode according to a preset timing.

In addition, a power factor correction (PFC) block exists to improve the power factor of the circuit in the PDP power supply unit. When an AC voltage is applied, a voltage close to DC is transferred to the PFC block through a bridge rectifier circuit.

As shown in FIG. 1, the power sequence of the PDP supplies 5V standby power when AC power is input, and outputs a relay on signal when AC power detection signal is transmitted. , 16V).

In addition, when the display module is connected, outputs an M5V on signal for supplying M5V power to supply M5V power to the connected display module, and when a detection signal of 5V power is input thereto, a Vs_ON signal for driving the display module. To supply the sustain voltage (Vs) and the address voltage (Va), respectively.

However, in this case, the power sequence for supplying the power is changed according to the type of the display module, and accordingly, the corresponding driving power should be supplied to the display module by applying a power sequence suitable for the currently connected display module.

That is, for example, as shown in FIG. 2, the Vcc power is applied toward the display module currently connected according to the M5V_ON signal, and accordingly, the Va voltage and the Vs voltage are sequentially applied after a predetermined time T on according to the input Vs_ON signal. To be authorized.

However, the timing at which the Va and Vs voltages are applied varies depending on the type of the display module. Accordingly, when the display module is changed, it is inconvenient to separately set the power sequence.

In addition, since a power sequence corresponding to each of the display modules has to be set accordingly, software corresponding to the display module has to be separated, and there is a problem in that management is difficult.

The present invention has been made to solve the above problems, and it is an object of the present invention to recognize whether a display module is changed or not, and to drive the display module by applying a corresponding power sequence according to the type of display module.

According to an aspect of the present invention, a video display device includes: a display module for displaying an input image; A memory unit that stores power sequence information according to the type of display module; A controller which reads power sequence information according to the type of the display module from the memory unit and outputs a corresponding control signal based on the read power sequence information; And a power supply unit supplying driving power to the display module based on a power sequence according to the type of the display module according to a control signal of the controller.

In addition, a method for controlling power of an image display device according to the present invention for achieving the above object comprises the steps of: determining a type of a display module currently connected to the power supply method of the image display device having a display module for displaying an image; Reading power sequence information according to the type of the determined display module; And supplying corresponding driving power to the connected display module based on the read power sequence information.

According to the present invention, a video display device and a power control method automatically apply a power sequence according to a type of a module currently connected according to whether a module is changed, thereby driving the corresponding module, and separately setting the power sequence according to the module change. It solves the inconvenience that needs to be set), and it does not need separate management according to the difference of module, which contributes to securing module reliability.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the spirit of the present invention is not limited to the embodiments presented, and other embodiments included within the scope of other inventive inventions or the scope of the present invention can be easily made by adding, changing, or deleting other elements. I can suggest.

3 is a block diagram showing a configuration of an image display device according to the present invention, FIG. 4 is a view for explaining actual different Va and Vs timings for each display module, and FIG. 5 is a power control of the image display device according to the present invention. Flow chart for explaining the method step by step.

As shown in FIG. 3, the image display device according to the present invention includes a display module 10 for displaying an input image and a memory unit 20 storing power sequence information according to the type of display module. ) And power sequence information according to the type of display module 10 connected from the memory unit 20 as the display module 10 is connected, and the read power sequence The display module 10 based on a power sequence according to the type of the display module 10 according to the control unit 30 and the control signal of the control unit 30 to output the control signal based on the information. It is configured to include a power supply unit 40 for supplying the driving power to the.

The operation of the image display device according to the present invention configured as described above is as follows.

The display module 10 displays an image signal input from the outside, and is applicable to various types of display modules such as digital light processing (DLP), liquid crystal display (LCD), plasma display pannel (PDP), and the like.

However, the plasma display pannel (PDP) is described as an example to aid in understanding the present invention. However, the present invention is not limited thereto, and the above various types of modules may be used.

In addition, the display module 10 stores power sequence information for driving the module. The display module 10 performs I2C communication with the controller 30 as 5V power is supplied, and transmits the corresponding power sequence information.

The control unit 30 outputs a corresponding control signal to each unit of the image display device according to a command input from the outside.

In addition, the controller 30 outputs an M5V power on signal for performing communication with the display module 10 during initial booting, and accordingly performs communication with the display module 10 to perform the connected display module. (10) Types are discriminated.

Here, the control unit 30 receives the power sequence information from the display module 10 and updates the memory unit 20. This will be described in detail below.

First, in case of the first connected display module 10, the corresponding power sequence information is received from the connected display module and stored in the memory unit 20.

In addition, when another display module is connected later, it is determined whether power sequence information corresponding to the type of the connected display module is stored in the memory unit 20.

If the power sequence information corresponding to the type of the display module is stored, the corresponding power sequence information is extracted and applied. If the power sequence information is not stored, the power sequence information is received from the display module. The memory unit 20 is updated.

The memory unit 20 stores power sequence information corresponding to the display module, and the power sequence information includes Va, Vs, and LVDS timing information.

In the Va timing, when the Vs_ON signal is input through the control unit 30 after the Vcc power is applied at power-on, the Va power should be input after a minimum specific time, and the Va power should be applied after the Vcc is applied. The time interval is referred to as Va timing, and the time interval at which the Vcc power should be turned off after a minimum specific time after the Vs power is turned off at the time of power off is referred to as Vs timing.

In addition, if the module resolution is divided into VGA, XGA, UXGA, etc., the pixel clock including H and V Sync will be different from each other, and the LVDS timing outputted from the controller 30 according to the module may be set to the timing suitable for the corresponding display module. It should be set.

That is, as shown in FIG. 4, when the module types are 50x2A and 50x4P, when the power is on, 50x2A should be applied with a Va voltage at least 0.2S after Vcc power is applied, and 50x4P is applied with Vcc power. After at least 0.5S, Va voltage should be applied.

In addition, when powering off, 50x2A should turn off Vcc at least 0.3s after Vs is turned off, while 50x4P should turn off Vcc at least 0.2s after Vs is turned off.

Accordingly, the controller 30 applies a power sequence according to the type of display module currently connected based on the power sequence information previously stored in the memory unit 20 and the power sequence information provided from the display module 10.

The power supply 40 supplies a corresponding driving power to each IC, and supplies power to drive the display module by applying a power sequence corresponding to the connected display module according to a control signal of the controller 30.

As such, the image display device according to the present invention automatically drives a corresponding module by applying a power sequence according to the type of the currently connected module according to whether the module is changed, and separately sets the power sequence according to the module change. It solves the inconvenience that needs to be done and contributes to securing module reliability because it does not need separate management according to the difference of modules.

In the method for controlling power of an image display device according to the present invention configured as described above, as shown in FIG. 5, first, AC power is applied (S10).

Next, it is determined whether the connection of the display module is detected (S20).

In operation S30, when the connection of the display module is detected, M5V is applied to the connected display module.

Subsequently, communication with the connected display module is performed to determine the type of the corresponding display module (S40).

In operation S50, it is determined whether power sequence information according to the type of the display module exists.

Subsequently, if the power sequence information exists in the determination result (S50), the power sequence information according to the type of the display module is read (S60).

In addition, if the power sequence information does not exist in the determination result (S50), the corresponding power sequence information is received from the display module (S70).

Subsequently, the transferred power sequence information is updated to a memory (S80).

In operation S90, the display module is driven based on the received power sequence information or the read power sequence information.

As described above, the video display device and the power control method according to the present invention automatically apply the power sequence according to the type of the module currently connected according to the change of the module to drive the corresponding module, thereby separately matching the power sequence according to the module change. It solves the inconvenience of setting and contributes to securing module reliability because it does not need separate management according to the difference of modules.

1 is a detailed view showing a power sequence of a typical plasma display device.

2 is a view for explaining the difference of the corresponding power sequence for each display module.

Figure 3 is a block diagram showing the configuration of an image display device according to the present invention.

4 is a view for explaining the actual Va, Vs timing different for each display module.

5 is a flowchart illustrating a step-by-step method for controlling power of an image display device according to the present invention.

<< Explanation of symbols for main part of drawing >>

10: display module 20: memory

30: control unit 40: power supply

Claims (10)

A display module for displaying an input image; A memory unit that stores power sequence information according to the type of display module; A controller which reads power sequence information according to the type of the display module from the memory unit and outputs a corresponding control signal based on the read power sequence information; And, And a power supply unit supplying driving power to the display module based on a power sequence according to a type of the display module according to a control signal of the controller. The method of claim 1, The controller performs I2C communication with the display module to determine the type of the connected display module. The method of claim 2, The controller extracts power sequence information according to the determined display type from the memory unit, and applies the extracted power sequence information to output a control signal to the power supply unit so that a corresponding driving power is supplied to the display module. An image display device. The method of claim 1, And the display module stores power sequence information corresponding to the display module. The method of claim 4, wherein If the power sequence information according to the type of the determined display module does not exist in the memory unit, the controller receives corresponding power sequence information from the connected display module and updates the memory unit in the memory unit. Video display device. The method according to any one of claims 1 to 5, The power sequence information includes Va, Vs and LVDS timing information. In the power control method of a video display device having a display module for displaying an image, Determining a type of the currently connected display module; Reading power sequence information according to the type of the determined display module; And, And supplying corresponding driving power to the connected display module based on the read power sequence information. The method of claim 7, wherein The step of determining the type of the display module Supplying main 5V power to the display module when the display module is connected; And determining the type of the connected display module by performing I2C communication with the display module based on the supplied power. The method of claim 7, wherein And if the power sequence information does not exist according to the type of the display module, receiving and updating the corresponding power sequence information from the connected display module. The method according to any one of claims 7 to 9, And the power sequence information includes Va, Vs, and LVDS timing information.
KR1020070127292A 2007-12-10 2007-12-10 Display apparatus and method for controlling power KR20090060473A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10923067B2 (en) 2017-12-12 2021-02-16 Samsung Display Co., Ltd. Display device and a method of driving the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10923067B2 (en) 2017-12-12 2021-02-16 Samsung Display Co., Ltd. Display device and a method of driving the same

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