JPH0695057A - Title display system of projection type liquid crystal display device - Google Patents

Abstract

PURPOSE:To obtain the title display system by which it is easily known whether image data are registered. CONSTITUTION:When title data are stored on a floppy disk, an unregistered area is found by searching title data registration flags (S22). Then a title taking-in position is read out (S26), it is decided which of a one-character left upper, a right lower, a left lower, and a right upper, and a left upper position on a screen the taking-in position is, and the storage address of image data at the corresponding position is set as a transfer source address (S27-S35). Then the image data in the transfer source address while inverted are set in a write buffer (S36). Further, the title data in the write buffer are stored in a title image data file on the floppy disk (S37).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a title display system for a projection type liquid crystal display device.

[0002]

2. Description of the Related Art As a projection type liquid crystal display device, a device is known in which a liquid crystal panel is irradiated with laser light to form an arbitrary image and the image is projected on a screen.

On the other hand, an OHP (over head pr) for enlarging and projecting a document printed or copied on a transparent film is projected.
ojector) is also widely used in companies and schools. Also, by placing a liquid crystal panel on the light source of the OHP and displaying the data created by the personal computer on the liquid crystal panel, the data is directly projected on the screen.
A liquid crystal display device for HP has been considered.

By the way, when a plurality of image data can be stored in a projection type liquid crystal display device, each image data has a title for identifying the image data or for identifying whether or not the image has been registered. Need to attach.

[0005]

As a general method of attaching a title of image data, there is a method in which a user inputs a title name of each image data. For that purpose, characters are input to a projection type liquid crystal display device. It is necessary to provide a function.

On the other hand, in order to realize a compact and low-cost projection type liquid crystal display device, it is necessary to eliminate the character input function and simplify the structure of the device. In a projection-type liquid crystal display device that does not have a character input function, how to attach the title of image data becomes a problem. Therefore, it may be considered that a part of the image data stored as the image data is taken in as title data and the data is displayed.

In that case, as a method of designating the area of the title data, it is conceivable to predetermine a specific area of the image data as a fetch area of the title data. However, if a specific area of the image data is captured as the title data, an area in which no image data exists, that is, an area of all white dots may be captured as the title data. In that case, since all white dots are displayed as the title, there is an inconvenience that it is not known from the title whether the image data has been registered or not registered.

[0008] An object of the present invention is to provide a title display system in which whether or not image data is registered can be easily known.

[0009]

In the title display system of the projection type liquid crystal display device of the present invention, a part of the image data is fetched as title data, and the fetched data is inverted and displayed. .

Therefore, even if the image data includes all white dot data as the display data, the data is inverted and displayed as black dot data, so that the image data and the other titles are registered. Can be easily identified.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an external view of a liquid crystal display device for OHP according to an embodiment of the present invention.

On the upper surface of the main body of the liquid crystal display device, there are provided a status display section 11 for indicating the operating status and a keyboard section 12 for designating the operating status and the display screen. A disc insertion slot 13 is provided. Also, the liquid crystal display device body,
A liquid crystal panel 14 composed of 640 × 400 dot phase change liquid crystal and a handy scanner 15 for reading characters, figures and the like are connected. Further, the remote controller 16 can be optionally used.

FIG. 2 shows a status display section 11 and a keyboard section 1.
2 is an enlarged view of FIG. The status display unit 11 indicates the operating status of the liquid crystal display device, for example, which mode the system is in, such as a manual screen data display mode, a data capture mode from the handy scanner 15, and a screen data storage mode. Operation number display section 1 that displays the operation number
1a, a screen number display section 11b for displaying a screen number of screen data, and an LE that lights up when the liquid crystal display device is in operation
It is composed of a D11c and an LED 11d that lights up when an abnormality occurs.

The keyboard section 12 includes a ten-key pad for inputting numerical values 0-9, an input key for operating the operation number set by the ten-key pad, and a front key for displaying the previous screen during manual operation. It consists of an end key that is operated to end the operation being executed.

Next, in the liquid crystal display device having the above-mentioned configuration, the processing contents when displaying the data read by the handy scanner 15 on the liquid crystal panel 14 will be described with reference to FIGS.
This will be described with reference to the flowchart in FIG.

First, the read size set by the user is read in step S1 of FIG. Here, the reading size is a code set by the user according to the size of the area to be read by the scanner 15, and is “0” shown in FIG.
Four types of codes, "1", "02", "03", and "04" are provided.

For example, when the area size is in the range of 50 × 25 mm, the reading size is “01”, the resolution of the scanner 15 is 400 DPI, the scanning direction of the scanner 15 is vertical, and the area size is 105 × 67 mm. When it is within the range, the reading size is "02" and the resolution of the scanner 15 is 200DP
I, the scan direction is vertical. Also, the size of the area
If it is within the range of 128 x 80 mm, set the reading size to
3 ", resolution is 200 DPI, scan direction is horizontal, and when the area size is in the range of 160 x 100 mm, read size is" 04 ", scanner 15 resolution is 200 DPI, and scan direction is horizontal.

In the next step S2, it is determined whether or not the read size is "01". "01" as reading size
If is set, the process proceeds to step S3, the screen data for one screen of the liquid crystal panel 14 is read by the handy caner 15, and the screen data is stored in the screen data buffer (not shown) of the RAM 26. At this time, if the user has instructed to invert the screen data,
The data read by the scanner 15 is inverted and stored in the screen data buffer.

If the read size is not "01" in the determination in step S2, the process proceeds to step S4 to determine whether the read size is "02". When "02" is set as the reading size, the data for one screen of the liquid crystal panel 14 is stored in the reading screen data buffer from the scanner 15, but at this time, the dot data of a multiple of 4 of the vertical line is read out and discarded. Data other than the above is stored in the screen data buffer. As a result, the dot data in the Y-axis direction is compressed to 3/4. When the user instructs the screen data to be inverted, the read data is inverted and stored in the screen data buffer.

Further, the data stored in the screen data buffer in step S6 is thinned out by 2 dots per byte. As a result, the dot data in the X-axis direction is compressed to 3/4.

When the read size is not "02" in the determination in step S4, the process proceeds to step S7 in FIG. 4 and it is determined whether or not the read size is "03". When "03" is set as the reading size, step S8
The data for one screen of the liquid crystal panel 14 is read, the dot data in multiples of 3 in the scanning direction is read and discarded, and the other data is stored in the screen data buffer. As a result, the dot data in the Y-axis direction (in this case, the scan direction is the horizontal direction) is compressed to 2/3.

Further, in step S9, the data in the screen buffer is thinned out by 3 dots per byte. As a result, the dot data in the Y-axis direction (vertical direction) orthogonal to the scanning direction is compressed to 5/8.

Then, in step S10, the data in the screen data buffer is vertically / horizontally converted. This is because when the read size is "03", the scan target is scanned in the horizontal direction, so the screen buffer stores 90 ° rotated data. This is for reversing and restoring the original data.

If the read size is not "03" in the determination of step S7, it is "04", so step S11
Proceeding to step 1, the scanner 15 reads data for one screen of the liquid crystal panel and sets it in the screen data buffer. At this time, dot data that is a multiple of 2 in the scan direction is discarded and the other data is stored in the screen data buffer. As a result, the dot data in the X-axis direction (in this case, the scanning direction is the horizontal direction) is compressed to 1/2.

Further, in step S12, the data in the screen data buffer is thinned out by 4 dots per byte. As a result, the dot data in the Y-axis direction (vertical direction) is compressed to 1/2. After that, the process proceeds to step S10 described above, and vertical / horizontal conversion of the screen buffer is performed.

After steps S3 and S6 of FIG. 3 or step S10 of FIG. 4, the process proceeds to the liquid crystal panel display process of FIG. 5A. In this liquid crystal panel display processing, first, step S1
At 3, the temperature of the temperature sensor provided on the liquid crystal panel 14 is read. Here, the temperature of the liquid crystal panel 14 is detected because the temperature of the liquid crystal panel 14 changes due to the heat from the light source of the OHP in the use state. Therefore, an appropriate speed according to the temperature of the liquid crystal panel 14 at that time is detected. This is for writing data.

Next, in order to erase the afterimage of the liquid crystal panel 14,
In step S14, the entire surface of the liquid crystal panel 14 is once set in a scattering state, and then in step S15, the entire surface is set in a transmitting state. Then, in step S16, the screen data in the screen data buffer is transferred to the L level for each line (80 bytes) by the DMAC32.
The data for one screen read by the scanner 15 is displayed on the liquid crystal panel 14 by DMA transfer to the CD interface 27. Further, in step S17, the liquid crystal panel 14
Is kept in that state and the display state is held. As a result, the image read by the handy scanner 15 is displayed on the liquid crystal panel 14.

Next, the processing contents when a part of the data displayed on the liquid crystal panel 14 is stored in the floppy disk as title data will be described with reference to the flowcharts of FIGS. 6 and 7.

In step S21 of FIG. 6, the screen number correspondence table file is read. First, the title image data file and the screen number correspondence table file will be described with reference to FIGS. 8 and 9.

In this embodiment, 99 pieces of screen data can be stored in one floppy disk,
The title image data file shown in FIG. 8 is provided with a memory area for storing title data for 99 sheets. In addition,
The memory area for 96 sheets is actually used for storing the title data, and the areas for the other three sheets are not used.

The screen number correspondence table file is a table in which the screen numbers of the screen data and the storage positions of the title data of the title image data file are associated with each other, and the title storage position information of each screen is stored in the order of the screen numbers. .

As shown in FIG. 9, the screen number correspondence table file is provided with a registration flag indicating whether the screen data has been registered, a memory area for storing the screen numbers 01 to 99, and the screen data in order. File name (for example, SW001
To SW999), a memory area for storing title number position information indicating the title data position in the title image data file, and a dummy memory area for storing other information. Is composed of an area for 99 files.

In addition to this, 99 pieces of the usage status of the title image data file) to (99), a memory area for storing a secret code necessary for deleting the screen data, the next screen number, There are provided a memory area for storing the file name of and a dummy memory area.

Title data registration flags (1) to (99) above
Is provided corresponding to the title number of the title image data file. For example, when the title data is not registered in the file (area) of the title image data file with the title number "01", the title data registration flag (1 ) Is written with "00", and when the title data is registered, "80" is written.

When the screen data is deleted, the subsequent data of the screen number correspondence table file is 1
The title data registration flag corresponding to the title number used in the deleted screen data is rewritten to "00" (unregistered) by shifting the file forward. The number of digits in each memory area indicates how many bytes each of them has.

Returning to FIG. 6, in step S22, the title data registration flag of the screen number correspondence table file is searched to check whether or not there is an unregistered area in the title image data file. If there is no unregistered area, the error processing of B in FIG. 7 (S23 in FIG. 7) is executed.

If there is an unregistered area, the process advances to step S24 to read the unregistered file of the title image data file, and in the next step S25, it is determined whether or not the file can be normally read.

If the data can be read normally, the title fetching position is read in the next step S26. In this embodiment, when the data displayed on the liquid crystal panel 14 is stored in the floppy disk, it is taken in at five positions shown in FIG. 10, that is, one character lower left on the liquid crystal panel 14 ((1) in the same figure). , Lower right ((2) in the figure), lower left (in the figure
(3)), upper right ((4) in the figure), upper left ((5) in the figure) 5
The user is allowed to specify one of the points.

When the title fetching position is read, in step S27, the designated fetching position is set to the upper left corner 1 of the screen.
It is determined whether it is below the character. The lower left one character is provided to capture the data of the Oasis document.

If one character lower left on the screen is designated as the title capture position, the process proceeds to step S28 and the storage address of the data displayed one character lower left on the liquid crystal panel 14 (the storage address of the screen data buffer). ) As the transfer source address.

If it is determined in step S27 that the designated title capturing position is not one character lower left on the screen, it is determined in step S29 whether the capturing position is the lower right position on the screen. If the lower right corner of the screen is designated as the title capture position, the process proceeds to step S30 and the storage address of the data displayed in the lower right corner of the liquid crystal panel 14 is set as the transfer source address.

If it is determined in step S29 that the designated title import position is not at the lower right of the screen, step S31
Determines whether the capture position is at the lower left of the screen. If the lower left corner of the screen is designated as the title capture position, the process proceeds to step S32, and the storage address of the data displayed at the lower left corner of the liquid crystal panel 14 is set as the transfer source address.

If it is determined in step S31 that the designated title import position is not at the lower left of the screen, step S33.
Determines whether the capture position is at the upper right of the screen. If the upper right corner of the screen is designated as the title capture position, the process proceeds to step S34 and the storage address of the data displayed in the upper right corner of the liquid crystal panel 14 is set as the transfer source address.

If it is determined in step S33 that the designated title fetch position is not the upper right corner of the screen, it means that the upper left corner of the screen is designated as the title fetch position. The storage address of the data displayed in the upper left is set as the transfer source data.

If one of the lower left, lower right, lower left, upper right or upper left address of the screen is set as the transfer source address, the data of the transfer source address (in this case, 8 full-width characters) is set in step S36. Data) is inverted and sequentially transferred to the write buffer.

Then, in step S37, the data in the write buffer is written in the vacant area (the area where the title data registration flag is unregistered) of the title image data file of the floppy disk. Furthermore, step S
In step S38, it is determined whether or not there is an error in the written data. If there is no error, the process proceeds to step A39 in FIG. 7 (step S39 in FIG. 7). If an error is detected, the process in FIG.
B error processing (step S33 in FIG. 7).

In the process of A in FIG. 7, first, step S3
At 9, the data "80" is set in the write buffer in order to rewrite the title data registration flag corresponding to the area of the title image data file in which the title data is written this time to "registered". Further, in the next step S40, the title number of the title image data file in which the title data has been written is set in the write buffer.

Next, in step S41, the title number position information of the write buffer is written in the file corresponding to the screen number of the screen number correspondence table file of the floppy disk, and the data of the write buffer (in this case, is written in the corresponding title data registration flag). , "80" indicating that it has been registered) is written. Then, in step S42, it is determined whether or not there is an error in the written data, and if there is no error, the process ends there. At this time, if an error is detected, the error process of step S33 is executed.

By these processes, a specific area of the image data displayed on the liquid crystal panel 14 (one character below the upper left,
The lower right, lower left, upper right, or upper left data is registered as title data.

Next, the processing contents for displaying the title data stored in the floppy disk as described above will be described.
This will be described with reference to the flowchart of FIG. In step S51 of FIG. 11, the data in the screen number correspondence table file is read. In the next step S52, it is determined whether or not the registration flag of the first file is on. If the registration flag is on, the title number of the file is read in step S53. Then, in step S54, the title data of the corresponding title number in the title image data file is read, and in step S55 the title data is transferred to the screen data buffer.

As a result, reading of one title data is completed, so that the screen number is set to "1" in the next step S56.
Increment the screen number to "9" in step S57.
Determine whether or not it has reached 7 ”.

If the screen number is smaller than "97", the process returns to step S52 to read the next file of the screen number correspondence table file and repeat the above-mentioned processing. Step S
If the screen number reaches "97" in the judgment of 37, the reading of all the title data of the title screen data file has been completed, and the above-mentioned liquid crystal panel display processing (S13 to S1) is performed.
7) is executed, and the registered title data are collectively displayed on the liquid crystal panel 14.

In this embodiment, when a part of the image data is loaded into the title image data file, the data is inverted and stored, but the data is stored as it is in the title image data file and the title data is displayed. When performing, the data may be displayed in reverse.

FIG. 12 is a diagram showing an example of the display state of title data, and the figure shows a case where 48 titles from 01 to 48 can be displayed collectively. In this example, the screen number
In 01 to 07, some characters or figures of the image data are displayed inverted, and in screen numbers 08 to 14, the data of all black dots in which white dots are reversed is displayed. Therefore, it is understood from those displays that the image data is registered in the files of these screen numbers. Also, since screen number 21 and later all white dots are displayed,
It can be seen that images and title data are not registered in these files.

In the above embodiment, the case where the area to be taken in as the title data is predetermined has been described. For example, a cursor or the like is provided on the keyboard unit 12 and the image data displayed by using the cursor is displayed. It is also possible to specify an arbitrary area of as a title data import area. Even in that case, in the case of image data having many white dot areas, the title data can be displayed in reverse to easily identify whether or not the image data has been registered.

The present invention can be applied not only to the OHP liquid crystal display device but also to other projection type liquid crystal display devices.

[0057]

According to the present invention, when a part of the image data is fetched and displayed as title data, the title data is inverted and displayed. Therefore, the image data is registered from the displayed title. It can be easily identified whether or not it has been completed.

[Brief description of drawings]

FIG. 1 is an external view of an example.

FIG. 2 is an enlarged view of a display unit and a keyboard unit.

FIG. 3 is a flowchart (1) for displaying data read by a handy scanner on a liquid crystal panel.

FIG. 4 is a flowchart (2) for displaying data read by a handy scanner on a liquid crystal panel.

FIG. 5 is a flowchart (3) for displaying data read by a handy scanner on a liquid crystal panel.

FIG. 6 is a flowchart (1) for storing title data on a floppy disk.

FIG. 7 is a flowchart (2) for storing title data in a floppy disk.

FIG. 8 is a configuration diagram of a title image data file.

FIG. 9 is a configuration diagram of a screen number correspondence table file.

FIG. 10 is an explanatory diagram of title capture positions.

FIG. 11 is a flowchart for displaying title data.

FIG. 12 is a diagram showing an example of display of title data.

[Explanation of symbols] 14 liquid crystal panel 15 handy scanner

Claims (2)

[Claims] 1. A title display system for a projection type liquid crystal display device, wherein a part of image data is fetched as title data and the fetched title data is inverted and displayed. 2. A recording medium driving means for writing and reading data to and from a recording medium, and at least a part of image data read from the recording medium driving means is fetched as title data, and the fetched title data is read. A title display system for a projection-type liquid crystal display device, comprising: a display means for reversing and displaying.