KR19980026185U - LCD screen projector - Google Patents

Abstract

A display highlighting apparatus for a liquid crystal projector, comprising: a selection unit for selecting a key signal for a screen highlighting function; A control unit providing a control signal according to the selected key input signal; A signal generator for generating and providing a screen highlight specific signal corresponding to a screen highlight function according to the one control signal; A signal synthesizing unit for synthesizing each color signal of the input image data and a screen emphasis specific signal provided from the signal generator; It includes a projection unit for displaying the image data added to the screen enhancement signal output from the signal synthesis unit on one screen to add a function to highlight / display a specific portion of the screen formed by the liquid crystal projector for presentation efficiency There is an advantage to improve and raise the awareness of the viewer.

Description

LCD screen projector

The present invention relates to a Liquid Crystal Display (LCD) Projector, and more particularly, to a screen projector for highlighting / displaying a screen area to be emphasized by a user among the formed screens.

In general, an LCD projector is a device for projecting light from a lamp and allowing an image signal and a text signal input according to the projection of the light to be displayed on the screen as images and characters.

The LCD projector is currently used for presentations in which image or text data is projected on a screen and presented to a large number of people.

LCD projectors are often used for presentations because they can be used in large screens and in connection with personal computers (PCs), unlike OHP (Over Head Projector).

When the presenter wants to emphasize one area or one point of the display screen while using the LCD projector for presentation, the user directly instructs the highlighting portion using the indicator bar or emphasizes using the laser pointer. .

In addition, in connection with the PC, the area to be emphasized using a mouse is designated and displayed in software.

The following problems occur when an important part of a display screen of a liquid crystal projector according to the prior art or a user designates or emphasizes a position.

First, when the user makes a presentation using the indicator bar in front of the screen, the presenter's eyes are dazzled and the presenting feeling is degraded, and the data to be viewed by the audience is hidden by the presenter, thereby preventing the proper view of the screen.

Second, when the emphasis portion is specified using a mouse in software by connecting to a PC, the presenter needs to adjust the mouse directly in front of the PC, and thus there is a problem in that the presentation effect is reduced because the presenter cannot grasp the intention of the audience.

Third, there is an uneconomical problem of having to purchase and install the software separately because it processes the software as described above, and there is an uncomfortable problem of connecting to a PC.

Accordingly, the present invention has been made to solve the above-mentioned problems according to the prior art, and an object of the present invention is to increase the awareness of the viewer by adding a function of highlighting / displaying a specific portion of the screen formed on the LCD projector. There is provided a screen highlighting device for a liquid crystal projector.

1 is a block diagram showing a screen highlighting device of a liquid crystal projector according to the present invention

FIG. 2 is a diagram illustrating the signal synthesis unit shown in FIG. 1 in detail.

3A to 3C are diagrams illustrating screen highlighting methods in the screen emphasizing apparatus of the liquid crystal projector according to the present invention on a screen for each embodiment;

* Description of the symbols for the main parts of the drawings *

10: input signal processing unit 11: A / D conversion unit

12: signal synthesizing unit 13: storage unit

14: Interface unit 15: LCD

16: Remote controller 17, 18: Control unit

19: Synchronous separator 20: Signal generator

21: switching part

In the liquid crystal projector, the screen highlighting apparatus of the present invention is characterized in that it comprises: a selection unit for selecting a key signal for a screen enhancement function; A control unit providing a control signal according to the selected key input signal; A signal generator for generating and providing a screen highlight specific signal corresponding to a screen highlight function according to the one control signal; A signal synthesizing unit for synthesizing each color signal of the input image data and a screen emphasis specific signal provided from the signal generator; And a projection unit configured to display image data to which a screen enhancement signal output from the signal synthesis unit is added on one screen.

According to another aspect of the present invention, there is provided a liquid crystal projector comprising: a selection unit for selecting a key signal for a blacking enhancement function of an entire screen; A control unit providing a control signal according to the selected key input signal; A signal generator for generating and providing a screen emphasis specific signal corresponding to the blacking emphasis function of the entire screen according to the control signal; And a projection unit which displays the image data input according to the control signal on a screen by blacking the entire screen.

In still another aspect of the present invention, there is provided a liquid crystal projector comprising: a selection unit for selecting a key signal capable of blacking only a specific line of a screen; A control unit providing a control signal according to the selected key input signal; A signal generator for generating and providing a screen emphasis specific signal to blank image data inputted according to the control signal; And a projection unit which displays the image data input according to the control signal on one screen by blacking only a specific line.

In still another aspect of the present invention, there is provided a liquid crystal projector comprising: a selection unit which selects a key signal which can be flickered by pointing only a specific point of a screen; A control unit providing a control signal according to the selected key input signal; A signal generator for generating and providing a screen emphasis specific signal to display only a specific point of the screen according to the one control signal; A signal synthesizing unit for synthesizing each color signal of the input image data and a screen emphasis specific signal provided from the signal generator; And a projection unit configured to display image data to which a signal pointing to a specific point of a screen output from the signal synthesis unit is added on one screen.

Hereinafter, a screen emphasis apparatus of a liquid crystal projector according to the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing a screen highlighting apparatus of a liquid crystal projector according to the present invention, Figure 2 is a view showing in detail the signal synthesis unit shown in Figure 1, Figures 3a to 3c of the liquid crystal projector according to the present invention The screen emphasis method of the screen emphasis apparatus is shown on the screen for each embodiment.

First, referring to FIG. 1, the configuration of the input signal processor 10, the A / D converter 11, the synchronization separator 19, the first and second controllers 17 and 18, and the signal synthesizer 12 is described. ), A storage unit 13, an interface unit 14, a remote controller 16, a switching unit 21, and an LCD 15.

The input signal processor 10 separates and processes the color signal of the screen data input according to the vertical / horizontal synchronization signal provided by the synchronization separator 19 and outputs the color signal to the A / D converter 11.

The A / D converter 11 converts the separated analog color signals R, G, and B into digital signals and converts the color signals R, G, and C of the screen data according to the output control signal of the second controller 18. B) is output to the signal synthesizing section 12.

The signal output from the signal synthesizing unit 12 is temporarily stored in the storage unit 13 and displayed on one screen through the interface unit 14 and the LCD 15 according to the output control signal of the second control unit 18. Will be.

When the user wants to highlight an area of the displayed screen, the user selects a screen highlight signal using the remote controller 16.

According to the selected signal, the first control unit 17 generates a screen emphasis control signal and outputs it to the second control unit 18 and the signal generator 20.

The signal generator 20 generates a signal for flickering or colorizing the screen highlighting part according to the screen emphasis control signal and the output timing control signal of the first and second controllers 17 and 18.

If the user makes a flickering indication on the screen highlighting portion, the switching unit 21 switches on / off only one signal for the flickering area of the displayed screen, and a signal for the color processing area of the displayed screen data is switched on. The bit signal generated as a whole is outputted to the signal combiner 12.

One signal or the whole bit signal output from the switching unit 21 and the A / D converted color signals R, G, and B are synthesized by the signal synthesizing unit 12 to output the second control unit 18. The data is stored in the storage 13 according to the timing control signal.

The storage unit 13 temporarily stores the signal output from the signal synthesizing unit 12 and then displays the screen through the interface unit 14 and the LCD 15 according to the output timing control signal of the second control unit 18. To be displayed in the highlighted area.

Here, the detailed configuration of the signal synthesizing unit 12, as shown in Figure 2, the respective color signals (R, G, B) output from the A / D conversion unit 11 to the switching unit 21 Or gates 12a, 12b, and 12c for ORing the screen emphasis signal output through the output to the storage unit 13, respectively.

An operation of the configuration, that is, a screen emphasis method, will be described.

3A to 3C are diagrams showing screen highlighting methods in the screen emphasizing apparatus of the liquid crystal projector according to the present invention on a screen of each embodiment.

Prior to the description of the present invention, when the user selects a screen emphasis key signal using the remote controller 16 to emphasize the screen data displayed on one screen, the following menu is displayed on the screen.

1. Full screen masking

2.Section masking or specific line color treatment

3.Pointing

When the menu is displayed as described above, the user selects a desired highlighting method to highlight the screen.

(First embodiment)

First, as shown in FIG. 3A, the screen data displayed on one screen is masked as a whole to remove the masked portion by a part of the remote controller 16 to obtain a highlighting effect. Let's look at.

As shown in FIG. 1, the screen data includes an input signal processor 10, an A / D converter 11, a signal synthesizer 12, a storage unit 13, an interface unit 14, and an LCD 15. Via is displayed on the day screen.

At this time, when the user wants to make a presentation while emphasizing the displayed screen, that is, acting as an indicator bar, a menu called full screen masking among the menus is selected by using the remote controller 16 to the first controller 17. Enter it.

The first control unit 17 determines the selected signal, generates a signal corresponding to the menu, and provides the signal to the entire LCD 15.

That is, a control signal is output to the LCD 15 so that the entire displayed screen is masked.

Here, the provided signal is a signal for blocking the screen data projected on the LCD 15 as a whole.

In this way, when the entire screen is masked as shown in FIG. 3A, the user uses the shift key (not shown) of the remote controller 16 to remove the masked portion by a predetermined line to have the screen data highlighting effect.

In this case, when masking is removed line by line by using the movement key of the remote controller 16, the first controller 17 provides a control signal to the LCD 15 to output screen data corresponding to the removed line. To give.

(Second embodiment)

As shown in FIG. 3B, a method of highlighting a screen by selecting a menu of section masking among the menus will be described.

Here, the section masking menu is a method of highlighting the screen by masking or colorizing only a few lines of the displayed screen and causing it to flicker.

First, let's look at how to mask only a few specific lines on the screen.

As shown in FIG. 1, a user selects a partial masking key (not shown) of the remote controller 16 and outputs a partial masking signal to the first control unit 17.

The first controller 17 generates and provides a partial masking control signal to the LCD 15 so as to mask only a portion of the data displayed on the screen according to the partial masking signal.

Here, the provided signal is a signal for blocking the projection of some specific lines of the screen data being projected by the LCD 15.

In this way, as shown in FIG. 3B, when a specific line of a part of the screen is masked, the user emphasizes the screen data by moving the masked part line by line using a moving key (not shown) of the remote controller 16.

At this time, when the masking is removed while moving by a specific line by using the moving key of the remote controller 16, the first control unit 17 outputs a control signal to the LCD 15 to output screen data corresponding to the removed one line. To provide.

(Third embodiment)

Let's take a look at how to colorize and emphasize only certain lines of the screen.

In order to emphasize only a specific line of the screen when the user announces various conferences, the user selects the emphasis key using the remote controller 16 and applies it to the first control unit 17.

The first controller 17 provides a signal generation control signal to the signal generator 20 to generate a signal capable of emphasizing only a specific line of the screen according to the key signal.

The signal generator 20 generates a specific signal that can colorize only a specific line of the screen and provides the signal to the signal synthesizer 12.

As shown in FIG. 2, the signal synthesizing unit 12 outputs a specific signal provided from the signal generation unit 20 to the R, G, and B signals output from the A / D converter 11. It is output to the storage unit 13 through 12a, 12b, 12c.

At this time, the operation for achieving the function is performed in the signal synthesizing unit 12, as shown in Figure 2, the least 6 bits of the 8-bit R, G, B signals applied from the A / D conversion unit 11 For each signal of the synthesized with the specific signal received from the signal generator 20 is to transmit a signal to the storage unit (13).

Here, the degree of screen color matching is adjusted by the number of bits in the signal generator 20.

That is, as shown in Figure 2, since the signal synthesizing portion 12 is composed of or gates (12a, 12b, 12c) the degree of coloration may vary depending on the signal provided from the signal generator 20 will be.

In addition, as shown in FIG. 3C, in order to flicker on the screen, that is, to highlight the pointing function, the function is implemented through the switching unit 21 as described above, and the degree of coloration of the pointing function is also described. In the same manner, the signal generation unit 20 performs the number of bits.

When the highlight function is displayed on the screen in this way, the user highlights specific portions while moving the highlight screen by using the up, down, left, and right moving keys of the remote controller 16.

The screen emphasizing apparatus of the liquid crystal projector according to the present invention has the effect of improving the presentation efficiency and the viewer's awareness by adding a function of highlighting / displaying a specific part of the screen formed by the liquid crystal projector.

Claims (3)

In the liquid crystal projector, A selection unit for selecting a key signal for a screen enhancement function; A control unit providing a control signal according to the selected key input signal; A signal generator for generating and providing a screen highlight specific signal corresponding to a screen highlight function according to the one control signal; A signal synthesizing unit for synthesizing each color signal of the input image data and a screen emphasis specific signal provided from the signal generator; And a projection unit for displaying the image data to which the screen enhancement signal output from the signal synthesis unit is added on one screen. The method of claim 1, The signal synthesizing unit comprises a plurality of orifices which respectively perform an operation on each color signal (R, G, B) of the input image data and a screen emphasis specific signal output from the signal generator. Emphasis. The method of claim 1, The screen highlighting function is a screen projector, characterized in that the entire screen masking function, a specific line masking function, a specific line color processing function, a pointing function.