KR0158317B1 - Television receiver with blackboard function - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver having a blackboard function that allows a television receiver to be used as a black board. Each corner portion is based on an infrared ray transmitting means, a plurality of infrared ray receiving means installed adjacent to the infrared ray transmitting means and receiving the infrared signal, an infrared signal transmitting timing of the infrared transmitting means and an infrared signal receiving timing of the infrared receiving means. A plurality of distance sensing means for detecting the position of the object on the CRT screen, selection means for selecting a blackboard function, and image output means for displaying a predetermined image on the CRT screen based on the detection result of the distance sensing means; Characterized in that configured to include.

Description

Television receiver with blackboard function

1 is a block diagram schematically showing a configuration of a general television receiver.

2 is a view for explaining the concept of the present invention.

3 is a block diagram showing the main components of a television receiver having a blackboard function according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: Case 2a ~ 2d: Sensor

3: indicator rod 17: mixer

18: CRT drive unit 21: remote control device

22: receiver 23a ~ 23d: distance detector

24: OSD generator 25: control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television receiver, and more particularly, to a television receiver having a blackboard function that enables a television receiver to be used as a black board.

In general, television receivers (hereinafter referred to as TVs) have been developed and manufactured with a focus on receiving and demodulating broadcast signals transmitted from broadcasting stations and outputting them as video and audio signals through CRTs and speakers. As a result, video and audio playback devices such as VCRs (Vidoe Cassette Recoder), laser disk players, and compact disk graphics players have been developed and distributed, so that video and audio signals played back from these playback devices can be viewed on TV. TV is gradually being developed to use TV as a composite image output device.

1 is a block diagram schematically showing the configuration of a TV which is to perform such a function.

In the drawing, reference numeral 1 denotes an antenna, 2 denotes a tuner which tunes a predetermined broadcast signal from a broadcast signal received through the antenna 1 under the control of the controller 10 to be described later, and 3 denotes this tuner 2 IF amplification unit for amplifying the IF signal output from the (), 4 is a surface elasticity and the like, for example to separate the image intermediate frequency signal (PIF) and the audio intermediate wave signal (SIF) from the IF signal output from the IF amplifier (3) A P / S separation unit such as a filter, 5 is an audio detector for detecting an audio signal from the SIF signal, and 6 is an image detector for detecting an image signal from the PIF signal.

Further, reference numeral 7 denotes a remote control unit for selecting a channel desired by the viewer or performing TV / AV mode switching, etc. 8 denotes a receiving unit for converting an infrared signal from the remote control unit 7 into an electric code signal. Is a channel memory in which predetermined channel data is stored, 10 is a control unit for controlling the entire device according to the remote control signal from the remote control unit 7, 11 is OSD pattern data for displaying the operation state of the TV to the viewer, etc. OSD generating unit.

In the meantime, reference numeral 12 denotes an external AV device such as a VCR or a laser disc player, and reference numeral 13 denotes an audio from the voice detector 5 and the image detector 6 according to the switching signal from the controller 10. A switching unit for selectively outputting video signals and audio and video signals from the external AV device 12.

In addition, although reference numeral 14 is not shown for the voice signal output from the switching unit 13, the voice such as Base, Treble, Volume, etc. in accordance with the control signal from the control unit 10. 15 is a voice amplifier which amplifies the voice signal processed by the voice processor 14 and outputs it to the speaker.

Although reference numeral 16 is not shown for the image signal output from the switching unit 13, the color, tint, brightness, etc. according to the control signal from the control unit 10; Is an image processor which outputs R (Red), G (Green), B (Blue), and luminance (-Y) signals corresponding to the image signal, and 17 denotes RGB and luminance output from the image processor 16. A mixer which mixes and outputs the RGB and OSD blanking signal (Y ') output from the OSD generator 11 of the (-Y) signal, and 18 outputs the RGB and luminance (-Y) signals output from the mixer 17. On the basis of this, the CRT driving unit for driving the CRT.

That is, in the above-described TV, when the viewer operates the TV by using the remote controller 7, the control unit 10 controls the tuner 2 or the switching unit 13 to control the broadcast signal or the external AV device 12. By outputting the video and audio signals from the CRT, the viewer can watch the desired program.

On the other hand, TVs are becoming more and more computerized as TVs compete with computers for the central role of each household. However, the development of technology is urgently needed because the TV is not yet accessible for entertainment and educational functions that are strongly supported by computers.

In view of the fact that the TV has been advanced for adults, the present invention has a main object of enabling TV to be used for children's misuse or education. The goal is to provide a TV with a blackboard function that allows it to be used.

TV having a blackboard function according to the present invention for achieving the above object is provided in each corner portion of the CRT screen of the TV, a plurality of infrared transmitting means waves for transmitting infrared signals of a predetermined frequency, respectively adjacent to the infrared transmitting means A plurality of infrared receiving means installed to receive the corresponding infrared signal, a plurality of sensing distances from each corner to an object on the CRT screen based on the infrared signal transmitting timing of the infrared transmitting means and the infrared signal receiving timing of the infrared receiving means A distance sensing means, a selection means for selecting a blackboard function, and an image output means for displaying a predetermined image on the CRT screen based on the detection result of the distance sensing means.

In addition, a plurality of infrared rays transmitting means which are installed at each corner of the CRT screen of the television receiver for transmitting infrared signals of a predetermined frequency, respectively, and a plurality of infrared rays receiving which are installed adjacent to the infrared rays transmitting means to cut off the infrared signals. Means, a plurality of distance sensing means for sensing the distance of the object on the CRT screen at each corner based on the infrared signal transmitting timing of the infrared transmitting means and the infrared signal receiving timing of the infrared receiving means, selection for selecting a blackboard function Means and an image output means for displaying a predetermined image on the CRT screen based on the detection result of the distance detecting means.

In addition, the present invention is characterized in that it further comprises a color selection means for the viewer to select a predetermined color for the above configuration.

According to the present invention having the above-described configuration, since the TV can be utilized as one blackboard, the TV can be utilized as an entertainment device or an educational device.

Hereinafter, an embodiment according to the present invention will be described with reference to the drawings.

First, the technical outline of this invention is demonstrated with reference to FIG.

In FIG. 1, the sensing sensors 2a to 2d made of an infrared light emitting element and a light receiving element are installed at each corner portion of the CRT in the front of the TV case 1. Each of the detection sensors 2a to 2d transmits an infrared signal in a direction parallel to the surface of the CRT, and then detects a signal reflected back to a specific object. In this case, the infrared signals output from each of the sensing sensors 2a to 2d correspond to sensing signals emitted from other sensing sensors as reflected signals by using different frequency bands.

That is, in the present invention, the time from the moment of signal output of each of the sensing sensors 2a to 2d to the moment of input of the reflected signal is detected, and then the position of the object present on the CRT is calculated based on this time.

By forming the specific image at the corresponding position on the CRT with this calculated result, the viewer displays the light in response to moving the indicator rod 3 in FIG.

FIG. 2 is a functional block diagram showing a functional configuration of a television receiver having a blackboard function according to an embodiment of the present invention. In FIG. 2, the same reference numerals are assigned to parts substantially the same as those in FIG. .

In FIG. 2, reference numeral 21 denotes a remote control device for the viewer to select a blackboard function, and 22 denotes a receiver for converting a remote control signal from the remote control device 21 into an electrical signal, and 23a to 23d are shown in FIG. The distance detecting unit 24, which includes each of the sensing sensors 2a to 2d, and outputs a signal proportional to the period from the signal output point to the reception point point, 24 is shown in FIG. 1 according to the control signal from the controller 25 to be described later. OSD generation unit for outputting a video signal corresponding to the movement of the indicator bar 3, 25 is a control unit for controlling the blackboard function according to the present invention.

In the above configuration, when the viewer selects the blackboard function using the remote controller 21, the control unit 25 first controls the OSD generator 24 to bring the CRT into a black screen state. At this time, the black screen is generated by controlling the OSD generator 24 to output only the OSD driving signal Y 'without outputting the RGB signal from the OSD generator 24.

Subsequently, the controller 25 determines the position of the indicator rod 3 in FIG. 1 based on the detection results from the first to fourth distance detectors 23a to 23d, and then controls the OSD generator 24. By sequentially displaying the screen portion of the CRT corresponding to the position of the indicator rod 3 in bright colors, a line corresponding to the movement of the indicator rod 3 is displayed.

When the viewer inputs the enter key of the remote control device 21, the viewer makes the first black screen again.

Therefore, according to the above embodiment, the viewer can use the TV as a blackboard.

In addition, the present invention is not limited to the above embodiments and various modifications can be made within the scope not departing from the technical gist of the present invention. For example, a color can be selected for the remote control device 21 in the configuration of FIG. If a color key is provided and the image displayed on the CTR is displayed in the corresponding color according to the color key selection, the TV can be used more effectively.

As described above, according to the present invention, it is possible to implement a TV having a blackboard function that can be utilized as a blackboard to provide entertainment and educational functions to children.

Claims (3)

A plurality of infrared transmitting means provided at each corner of the CRT screen of the television receiver to transmit infrared signals of a predetermined frequency in a direction parallel to the surface of the CRT, and adjacent to the infrared transmitting means to provide the infrared signal. A plurality of infrared receiving means for receiving, distance sensing means for outputting a signal proportional to the time from the infrared signal transmitting point of the infrared transmitting means to the infrared signal receiving point of the infrared receiving means, selection means for selecting a blackboard function; And a picture output means for displaying a predetermined image on a CRT screen based on the detection result of the distance detecting means. The television receiver according to claim 1, wherein said plurality of infrared ray transmitting means transmits infrared signals of different frequencies. The television receiver with a blackboard function according to claim 1, further comprising a color selecting means for the viewer to select a predetermined color.