KR100549307B1 - Apparatus for controlling brightness of PDP TV - Google Patents

Abstract

According to an embodiment of the present invention, the brightness of a PDP TV is automatically adjusted according to an input signal so that an interlaced signal and a progressive signal are distinguished from an image signal input from a TV having a plasma display panel (hereinafter referred to as a PDP) so that a luminance difference does not occur. Relates to a device.

In particular, the present invention distinguishes the progressive 480p signal or the interlace 480i signal according to the input video signal, and accordingly, the analog signal is automatically adjusted using the corresponding luminance difference based on the luminance difference of the digital signal. To make improvements.

Therefore, the brightness control device of the PDP TV according to the present invention has an effect of improving the luminance difference between the interlaced signal and the progressive signal generated by the mass production of the product by 100%, thereby providing an image quality improvement and convenience to the user.

PDP TV / Brightness / 480i / 480p

Description

Apparatus for controlling brightness of PDP TV

1 is a block diagram showing the configuration of a brightness control apparatus of the PDP TV according to the prior art;

Figure 2 is a block diagram showing the configuration of the brightness adjustment apparatus of the PDP TV according to the present invention

Explanation of symbols for main parts of the drawings

110: video signal supply unit 120: deinterlace

130: image quality improvement signal processor 140: D / A converter

150: input signal processor 160: scaler

170: PDP module 180: memory (SDRAM)

190: micom

The present invention relates to a TV, and in particular, luminance compensation is automatically performed according to an input signal so as not to generate a luminance difference by distinguishing an interlace signal and a progressive signal from an image signal input from a TV having a plasma display panel (hereinafter referred to as PDP). A luminance control device of a PDP TV.

A TV is a video device that tunes and demodulates a room transmission call according to a channel selected by a user among broadcast signals transmitted from a broadcasting station, divides it into voice and video, and outputs it through a screen and a speaker through corresponding voice and image processing. In addition to the most widely used CRT, there is also a TV using LCD, PDP, etc. to satisfy the high quality / large screen characteristics.

Particularly, in the case of PD TV, it is possible to manufacture considerably thinner than the existing CRT in terms of its structural characteristics and to satisfy the technical requirements of TV as it has excellent luminance characteristics compared to LCD, and it has been spotlighted as the next generation TV due to its excellent layout characteristics such as wall installation. have.

However, due to the characteristics of PDP, high voltage is required during operation, so control of power-related configuration is one of the technical requirements for commercialization of PDTV.

One of the problems related to the quality of PDPs in mass production is the difference in brightness between the interlaced (480i) signal and the progressive (sequential scan) 480p signal.

Hereinafter, a brightness control apparatus for a PDP TV according to the prior art will be described with reference to the accompanying drawings.

1 is a block diagram showing a luminance control device of a PDP TV according to the prior art.

As shown in FIG. 1, the PDP TV according to the related art includes an image signal supply unit 10 for supplying a color difference signal of 480i (Y / CbCr type) and a color difference signal of 480p (Y / PbPr type), and the image. On the PDP module 60 and the image quality improvement signal processor 20 that receives the 480i signal output from the signal supply unit 10 and outputs digital R, G, B video signals and digital luminance signals Y, U, and V signals. In order to adjust the brightness of the displayed video signal, the user directly adjusts the brightness of 480i and 480p, and the microcomputer 40 for outputting a control signal according to the adjustment signal input through the adjustment unit 30 And the brightness of the progressive signal 480P input through the video signal supply unit 10 or the interlace signal 480i signal output through the image quality improvement signal processor 20 according to the control signal of the microcomputer 40. Scaler to adjust and output And a PDP module 60 for displaying the output of the scaler 50.

The PDP TV according to the related art configured as described above selects one of the progressive signal 480p or the interlaced signal 480i signal through the adjusting unit 30 so that the producer adjusts the luminance in mass production of the product, By manually adjusting the brightness, the microcomputer 40 recognizes this and controls the adjustment to be performed according to the degree of distortion caused through data communication with the scaler 50 so that the brightness can be adjusted.

However, in the same set, the progressive signal 480p signal and the interlace signal 480i had to be visually checked and adjusted.

As described above, if the luminance difference between the interlaced signal and the progressive signal occurs during mass production of the PDP TV according to the prior art, since it is difficult to precisely adjust the luminance because 100% manual correction is performed, the luminance difference between the interlaced signal and the progressive signal is different. There was a problem that is difficult to improve 100%.

The present invention has been made to solve the above problems, and compares the luminance signal DC levels of analog R, G, and B signals with digital Y, U, and V signals, and automatically adjusts the PDP TVs to be the same. The purpose of the present invention is to provide a luminance adjusting device.

In order to achieve the above object, a brightness control apparatus for a PDP TV according to the present invention is a signal for selectively outputting a progressive 480p signal or an interlace 480i signal according to an input video signal in a PDP TV having a PDP module. A deinterlacing unit receives an interlace 480i signal from a signal supply unit and converts the interlaced 480i signal into a progressive 480p signal. An image quality improvement signal processor for outputting signals and digital Y, U, and V luminance signals, and a storage unit for storing a predetermined Y signal voltage difference in the digital Y, U, V luminance signals output from the image quality improvement signal processor as a reference value; The digital R, G, and B video signals output from the image quality improvement signal processor are received as analog R, G, and B video signals. An input signal processor for selectively receiving a D / A converter, an analog R, G, B video signal output from the D / A converter, or a progressive signal 480p signal output from the video signal supply unit; A scaler for processing an image signal output from the input signal processor as a signal that can be displayed on the PDP module, and determining whether a voltage level of the image signal processed by the scaler is equal to a voltage level stored in the storage unit; It is characterized by including a microcomputer for outputting a control signal so that the brightness adjustment can be made in the signal processor.

Preferably, the storage unit stores the high / low level difference of the Y signal among the digital Y, U, and V luminance signals output from the image quality improvement signal processor as a reference value.

More preferably, the microcomputer inputs the input signal processor according to whether the high / low level difference of the G signal among the analog R, G, and B video signals output from the scaler matches the reference value stored in the storage unit. It is characterized in that it outputs a control signal so that the luminance adjustment can be made.

Hereinafter, with reference to the accompanying drawings will be described in more detail the brightness adjustment apparatus of the PDP TV according to the present invention.

2 is a block diagram showing an apparatus for adjusting luminance of a PDP TV according to the present invention.

As shown in FIG. 2, an apparatus for adjusting luminance of a PDP TV according to the present invention includes an image signal supply unit 110 for outputting a progressive 480p signal and an interlace 480i signal, and an interlace from the image signal supply unit 110. The input signal 480i receives a deinterlace 120 for converting the signal into a progressive 480p signal, and receives a progressive 480p signal converted from the deinterlace 120 to improve image quality and to receive digital R, G, and B video signals. Storing the voltage level of a predetermined signal as a reference value in the image quality improvement signal processor 130 for outputting digital Y, U, and V luminance signals and the digital Y, U, V brightness signals output from the image quality improvement signal processor 130 A memory 180 and a D / A converter 140 for receiving digital R, G, and B image signals output from the image quality improvement signal processor 130 and converting them into analog R, G, and B image signals; / A converter (1 An input signal processor 150 for selectively receiving an analog R, G, B video signal outputted from 40 or a progressive signal 480p signal outputted from the video signal supply unit 110, and selectively processing the received signal; The scaler 160 for processing the image signal output from 150 as a displayable signal on the PDP module 170 and whether the voltage level of the image signal processed by the scaler 160 is equal to the voltage level stored in the storage unit. The microcomputer 190 determines whether or not the input signal processor 150 outputs a control signal to adjust the luminance.

Here, the memory 180 is composed of SDRAM.

Referring to the operation of the PDP TV according to the present invention configured as described above are as follows.

The video signal supply unit 110 is configured of a device such as a digital video disk (DVD) and outputs both a progressive 480p signal and an interlace 480i signal.

The interlaced signal 480i output from the image signal supply unit 110 is input to the deinterlacing unit 120 and converted into a progressive signal 480p, and the converted progressive signal 480p is converted into the image quality improvement signal processor 130. The video signal is input to improve the image quality such as neatly arranging the boundary, and outputs digital R, G, B video signals and digital Y, U, V luminance signals.

The digital R, G, and B image signals processed by the image quality improvement signal processor 130 are input to the D / A converter 140 and converted into analog R, G, and B image signals. The luminance signal is input to the scaler 160 and processed as a video signal that can be displayed on the PDP module 170, and at the same time, the high / low of the Y luminance signal among the digital Y, U, and V luminance signals Low) is stored in the memory 180 using the level difference as a reference value.

In addition, the input signal processor 150 receives the progressive signal 480p signal output from the video signal supply unit 110 and the analog R, G, and B video signals converted by the D / A converter 140. The brightness is consistently output according to the control signal of the microcomputer 190.

That is, when the producer selects the luminance adjustment mode, the memory 180 may determine a high / low level difference between the Y luminance signals among the digital Y, U, and V signals output from the image quality improvement signal processor 130. ) As the reference value.

After the analog R, G, and B video signals output from the D / A converter 140 are processed through the input signal processor 150, an A / D converter (not shown) built into the scaler 160 is illustrated. Convert to digital R, G, B video signal through.

Then, the microcomputer 190 adjusts the luminance according to whether the high / low level difference of the G signal in the signal converted by the scaler 160 matches the level difference stored in the memory 180. Determine.

That is, the microcomputer 190 does not generate a luminance difference when the high / low level difference of the G signal input through the scaler 160 matches the level difference stored in the memory 180. If the level difference occurs without performing the brightness adjustment, the brightness is adjusted by the generated level difference.

As described above, the PDP TV according to the present invention has the luminance of the digital Y, U, V signals output from the image quality improvement signal processor 130 and the analog R, G, B signals converted by the D / A converter 140. By comparing the signal DC levels, the two signals are automatically adjusted to be equal.

As described above, the brightness control apparatus of the PDP TV according to the present invention automatically adjusts the brightness difference between the interlaced signal and the progressive signal generated during mass production of the PDP TV, thereby improving the luminance difference by 100%, and thus, product user satisfaction. There is an effect that can increase.

Claims (3)

In a PDP TV with a PDP module, A signal supply unit for selectively outputting a progressive 480p signal or an interlace 480i signal according to an input video signal; A deinterlace for receiving an interlace signal (480i) from the signal supply unit and converting the signal into a progressive signal (480p); An image quality improvement signal processor for improving the image quality by receiving the progressive 480p signal converted by the deinterlace and outputting digital R, G, B image signals and digital Y, U, V luminance signals; A storage unit which stores a predetermined Y signal voltage difference among digital Y, U, and V luminance signals output from the image quality improvement signal processor as a reference value; A D / A converter which receives the digital R, G and B image signals output from the image quality improvement signal processor and converts the digital R, G and B image signals into analog R, G and B image signals; An input signal processor for selectively receiving an analog R, G, B video signal output from the D / A converter or a progressive signal 480p signal output from the video signal supply unit; A scaler for processing an image signal output from the input signal processor into a signal displayable on the PDP module; And, And determining whether the voltage difference of the image signal processed by the scaler is the same as the voltage difference previously stored in the storage unit, and outputting a control signal to adjust the luminance in the input signal processing unit. PDP TV brightness control device. The method of claim 1, And the storage unit stores a high / low level difference of a Y signal among digital Y, U, and V luminance signals output from the image quality improvement signal processor as a reference value. The method of claim 1, The microcomputer adjusts the luminance at the input signal processor according to whether the difference between the high / low level of the G signal among the analog R, G, and B video signals output from the scaler matches the reference value stored in the storage unit. The brightness control device of the PDP TV, characterized in that for outputting a control signal to be made.

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