KR20020080047A - TV Set Top Box Using PC - Google Patents

Abstract

PURPOSE: A TV set-top-box using a PC is provided to effectively transmit video and audio signals to a TV through wired and wireless media and automatically convert monitor resolution of the PC in order to view Internet images through the TV. CONSTITUTION: A TV set-top-box using a PC includes a motor system for interfacing with a home PC and a son system for interfacing with a TV. The mother system is composed of the first connection part connected with the PC, the second connection part connected with the son system, and a signal processor for processing signals transmitted and received between the two connection parts. The first connection part includes connection jacks that connect outputs of a keyboard, a mouse and a sound card of the PC to the mother system and connect VGA and audio signals from the mother system to a monitor and a speaker of the PC.

Description

TV set-top box device using PC {TV Set Top Box Using PC}

Recently, Setopbox is being developed and marketed to access the Internet and provide various services and contents through TV, which is the main medium of home culture.

The product design concept of these three-top boxes is to add some devices (cpu, os, memory, etc.) to an existing TV, connect it to the Internet, view screen information on a TV monitor, and operate it as a wireless keyboard.

However, this concept top-of-the-line box requires dedicated hardware similar to a PC, and requires a high cost of 50 to 900,000 won.

In addition, the STOP box with minimum specifications for cost saving has the disadvantage that the use of the application as well as the demonstration of audio and video is extremely limited due to the lack of the specification. As a result, the market is not activated despite the advantage that the STOP box device provides a new service.

This is the inevitable result of trying to implement the design concept of the Setop box as a new dedicated hardware by excluding the PC which already exists for reasons such as space separation from the TV. Therefore, this concept is the smallest low-cost operation product for the home without a PC, and it is a design concept that is not suitable for the home where the PC is already supplied.

Furthermore, in the case of homes in which these three-top boxes and PCs are distributed at the same time, the Internet line must be shared, so a line (eg LAN) should be connected in some form.

Since the line connection between the set-top box and the home PC is inevitable, most of the functions of the set-top box are added to a separate dedicated hardware so that the cost of the home PC can be used as it is, and the interface with the TV is partially reinforced. By doing so, it is possible to implement the set-top box function as a design concept that provides Internet service on TV at extremely low cost (under 100,000 won).

The present invention relates to such a design idea and a method of implementing an apparatus for realizing the same.

1. Convert video card (VGA) signal from PC to TV signal

2. Effective transmission of video and audio signals to TV through wired and wireless media

3. How to control PC with keyboard and mouse in front of TV

4. How to turn on / off PC in front of TV

5. How to automatically switch your PC's monitor resolution to watch Internet screen on your TV

<Explanation of symbols for main parts of representative figure>

1: monitor

2: PC

3: keyboard

4: mouse

5: VGA output terminal

6: ps / 2 mouse terminal

7: ps2 / 2 keyboard terminal

8: Audio output terminal

9: The present devised device

10: VGA output terminal

11: second connection

12: cable (7p)

13: TV video in

14: TV audio in (L)

15: TV audio in (R)

16: infrared sensor

17: Wireless Keyboard + Mouse

18: first connection

As shown in FIG. 1, the present invention is composed of two parts, a device for interfacing with a home PC (hereinafter referred to as a mosquito) and a device for interfacing with a TV (hereinafter referred to as a magnetic device).

1) As shown in FIG. 2A, a mosquito is composed of a first connection part for connecting with an existing PC, a second connection part for connecting with a self, and a signal processing part for processing signals between these connection parts. The first connector is composed of a connection jack for connecting the output of the PC keyboard, mouse, and sound card to the mosquito, and connecting the VGA signal and the audio signal from the mosquito to the PC monitor and the PC speaker, respectively.

The second connector is a 7pin jack for connecting the output signal of the signal processor of the mosquito to the magnetic.

Finally, the signal processing unit converts the VGA signal of the PC into a composite signal for TV, an audio line driving device for transmitting the output of the PC speaker to the magnet, and is connected to the PC mouse to transmit the mouse signal from the magnet. It consists of a mouse line drive and a keyboard line drive.

It is a device that connects the signal from the mosquito to the TV and transmits the signals of the wireless keyboard and mouse used in front of the TV to the mosquito. It is composed of video jacks, audio jacks (L, R), and infrared sensors as shown in FIG. .

<Fig. 3> It is a magnetic product, which has 7 strands and is connected to the cable and both ends by a connector.

Cable types are available in a variety of distances from 10M to 50M.

P is a connector that connects to a magnetic product.

P-1 is the VIDEO signal terminal and connects to the TV VIDEO terminal.

p-3,4 Connect the AUDIO output signal to the TV AUDIO input terminal.

p-6,7 are IR sensors for IR keyboard and mouse. The sensor is installed in front of the TV.

P-5 was used to protect the transmission distance and external noise by using coaxial and shielded cables inside the cable.

<5> is the most important mosquito product of the design is used next to the PC, the detailed description is as follows.

A device that converts a VGA signal from a PC into a TV signal is a mosquito product.

VGA input signal is input to P1 connector and VGA monitor input is connected to P2 terminal. The signal input to P1 is transmitted to VGA encoder chip U2. R1, R4 and R7 are used to match the RGB signal. The horizontal (H) and vertical (V) signals of the VGA signals are used by the U3 chip for input to the VGA encoder.

The chip of U2 is used to convert VGA signal into composite signal. In order to match composite signal with input impedance, R6, C15, L5, C17, 16 circuits are composed to configure the characteristics of bandpass filter. Output to JP6 terminal.

S-VIDEO signal is output signal and synthesized Y, C signal of U2 chip and applied to JS2 terminal. S-VIDEO signal can be used by two-terminal in TV input method.

COMPOSITE (J4) signal is used for video signal type in general, NTSC / PAL type is used in Korea.

SW DIP-3 switch selects 800X600 and 640X480 signals and converts them to NTSC signals.

B5S is a selector switch that can move TV screen up / down / left / right.

BCD SW is a switch that controls the internal control method and selects NTSC / PAL method.

The power supply inputs 9V to J3 terminal of DC input and maintains constant voltage using constant voltage IC (U1). In addition, the voltage applied to U2 uses FB coils for each signal type and bypass capacitors to separate the output voltages of the L1, L2, and L3 circuits to the U2 chip to eliminate noise on the screen. Stable design.

J1 transmits the output signal of the PC sound card as JP6 signal to transmit the cable.

JP1 and JP2 use keyboard / mouse module to match and reverse current to prevent mutual interference by using two sets of keyboard and mouse at the same time.

Q2's IR receiver sensor and keyboard / mouse module for the use of infrared (IR) keyboard and mouse were interfaced using one chip CPU.

IR keyboard / mouse is designed to be used on PC or TV because it is mobile.

The resolution and frequency of the TV monitor can be changed with a specific key using a dedicated program.

The device devised in the present invention

1. Since only the interface with the TV has been improved, Internet services can be used on the TV at a very low cost.

2. All application software of PC can be used as it is.

3. Compared with the dedicated hardware box, the hardware specification is freely improved and the high specification of the PC enables high quality audio video when using the Internet on TV.

4. It is possible to demonstrate home theater (home theater) at low cost because it can be demonstrated on TV in living room with DVD driver and DVD media for home PC.

5. The screen of the PC located in the space separated from the living room (other room) can be monitored only by changing the input selection of the TV.

Claims (5)

Product design method that enables Internet service on TV by adding interface device between home PC and TV to provide Internet service on TV A method of converting a VGA output signal of a PC into a composite signal for TV and transmitting it via wired or wireless for the purpose of implementing the method of claim 1 In order to achieve the purpose of claim 1, a method of controlling a PC in front of the TV by installing a device that receives a wireless (IR) keyboard and mouse signal in front of the TV and transmitting it to the PC by wire or wirelessly. Wireless keyboard located in front of the TV, a keyboard connected to a PC, and a gate to make it work the same as a mouse The method of monitoring the screens of PCs spaced apart (eg, crossing) by only changing channels (AUX or video 1 ...) in TV according to the design method of claim 1.