JP3348254B2 - Display color control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display color control device for performing color display control, and more particularly to a display color control device provided with a plurality of finite number of LUTs (look-up tables) .

2. Description of the Related Art In a color display device, a color display method for displaying pixel values corresponding to the brightness of each point on a screen in different colors (RGB) in the case of monochrome (black and white) display is often used. ing.

It is desired that a display color control method in such a color display device can be performed using a plurality of finite LUTs.

[0004]

2. Description of the Related Art In a color display device, a pixel value is expressed by:
An LUT is provided as hardware for converting to RGB values for color display, and by displaying pixel values at each point of the screen on the screen by referring to the LUT, The amount of information required for color display is reduced.

[0005] In addition, the screen is divided into a plurality of windows (window areas).
In such a case, in order to perform a different color display for each window, a unique RGB display is used for each window.
It is necessary to prepare a conversion table and perform conversion between pixel values and RGB values.

On the other hand, LU as hardware
A method of preparing only one T and setting the RGB conversion table of the window with the highest priority in the screen in the LUT,
A method has been proposed in which a large number of UTs are prepared so that a different LUT can be selected for each window.

[0007]

According to the method of preparing only one LUT and setting the RGB conversion table of the display with the highest priority in the screen in the LUT, only one window on the screen or accidentally Also the RG exactly the same as the window
Only the window using the B conversion table can perform normal color display, but cannot display normal colors in other windows. If the area of a high priority window is small, most of the screen is not displayed in a normal color.

In a method of preparing a large number of LUTs, selecting a different LUT for each window, and converting between pixel values and RGB values, a window is generally generated dynamically. The number of windows cannot be known in advance, and it is not known how many LUTs should be prepared in advance. In some cases, the number of windows can be very large, but in such cases a large number of LUTs
Which is practically not feasible.

The present invention is to solve such a problem of the prior art. Since the display is performed by using a plurality of finite number of LUTs, the display is easy and the LUT is easy to realize.
The display colors of a plurality of windows can be normally displayed within the range of the number of UTs.
An object of the present invention is to provide a display color control method that can store a history of settings for a UT and that can easily be reset and store and check the history.

[0010]

[Means for Solving the Problems]

(1) FIG. 1 shows the principle configuration of the present invention.
The present invention provides a display color control method that includes an LUT for setting an RGB conversion table for converting a pixel value of each point on a screen into an RGB value and performs color display for each of a plurality of windows obtained by arbitrarily dividing the screen. A finite number of LUTs are provided, and an RGB conversion table unique to each window on the screen is set to one of the finite number of LUTs at any time.

(2) According to the present invention, an LU for storing a selection value of an LUT corresponding to each window obtained by arbitrarily dividing a screen.
A T selection information storage unit 2, an LUT unit 8 having a plurality of finite LUTs and storing an RGB conversion table for converting each pixel value into an RGB value, and an LUT selected according to the selected value
A display color control system comprising: a display unit 7 that outputs RGB values corresponding to pixel values of each point on the screen based on the RGB conversion table in [1] and a display device 6 that performs color display on the screen based on the RGB values. , A window management unit 9 is provided, and RGB to be set for each window on the screen
A conversion table is designated, and an LUT management unit 10 is provided, and an RGB conversion table is set in one of a plurality of finite LUTs in the LUT unit 8 in accordance with the designation.

(3) The present invention relates to (2), wherein each LUT
The LUT management information storage unit 5 stores the RGB conversion table set in the LUT and the management information of the LUT indicating the order in which the LUTs are set, and the LUT management unit 10 performs the RGB conversion based on the management information of the LUT. This is to determine the LUT for which a table is to be set.

(4) Further, according to (3), the present invention includes an RGB conversion table storage unit 4 for storing the setting history of the RGB conversion table in the LUT, and the LUT management unit 10 stores the LUT management information and LUT in the LUT. The LUT to set the RGB conversion table is determined based on the setting history.

(5) In the present invention, in (4), the RGB conversion table storage unit 4 stores the setting history of the RGB conversion table in the LUT for each RGB conversion table.

[0015]

By setting the RGB conversion table in the LUT and converting the pixel values of each point on the screen into RGB values, when performing color display for each of a plurality of windows obtained by arbitrarily dividing the screen, a plurality of finite numbers are displayed. LUTs are provided, and an RGB conversion table unique to each window on the screen is set at any time to one of the finite number of LUTs to perform required conversion.

As described above, according to the display color control method of the present invention,
Since the display is performed by managing a plurality of LUTs, it can be physically realized even when a large number of windows are generated. In this case, since a plurality of finite LUTs are used,
The display colors of the plurality of windows can be normally displayed within the range of the number.

In this case, an RGB conversion table set in each LUT and an LU indicating the order in which the LUTs are set are set.
T management information is stored, and an LUT for which an RGB conversion table is to be set is determined based on the LUT management information.

Therefore, when it is necessary to store the RGB conversion tables equal to or more than the number of LUTs, the contents are updated from the oldest set LUT based on the use history of the LUT management information storage, and the recently used RGB conversion table is updated. The table is LU as it is
Since it can be left in T, a finite number of LUTs can be used efficiently.

Further, in addition to such LUT management information, the setting history of the RGB conversion table for the LUT is stored, and the RGB conversion table is set based on the LUT management information and the setting history for the LUT. The LUT to be determined is determined.

Therefore, the RG once deleted from the LUT
When resetting the B conversion table, it is possible to set the original LUT, so there is no need to change the LUT selection information for each point on the screen.

Furthermore, the LUT of such an RGB conversion table
Is stored for each of the RGB conversion tables, so that it is not necessary to prepare a large amount of storage area for storing the history, and it is possible to easily check each RGB conversion table.

[0022]

FIG. 2 shows the configuration of an embodiment of the present invention. In the figure, reference numeral 1 denotes a pixel value storage unit which stores a pixel value of each point on the screen, corresponding to each point. 2
Is an LUT selection information storage unit, which stores selection information on which number of LUT to use for each point corresponding to each point on the screen. A window information storage unit 3 stores the position and size of each window on the screen and the ID of an RGB conversion table to be applied.

FIG. 3 shows an example of the contents of the window information storage unit.
It shows that the position of the window by the Y coordinate, the size of the window indicated by the width and the height, the ID of the RGB conversion table to be applied, and the like are stored.

Reference numeral 4 denotes an RGB conversion table storage unit, and each RGB conversion table storage unit
Information such as the contents of the B conversion table, which LUT each RGB conversion table is set to, and which LUT has been set, is stored.

FIG. 4 exemplifies the contents of the RGB conversion table storage unit. For each ID which is a number for identifying each RGB conversion table, a pixel value and an R value are used as the contents of each RGB conversion table. , G value, and B value are defined. Here, the R value, the G value, and the B value are numerical values representing the brightness of each color (red, green, and blue), and have, for example, a value of 0 to 255, and the larger the value, the brighter. The LUT number indicates the number of the LUT in which each RGB conversion table is currently stored or the number of the LUT set in the past.

Reference numeral 5 denotes an LUT management information storage unit, which stores, at a certain point in time, an ID of an RGB conversion table set in each LUT and information indicating the order in which each LUT is set.

FIG. 5 exemplifies the contents of the LUT management information storage unit. The ID of the RGB conversion table set in correspondence with the number of each LUT and the information indicating the setting order in each LUT. And are stored.

A display device 6 displays each pixel on a screen in a designated color when RGB value information is input. Reference numeral 7 denotes a display unit, which extracts pixel value information from the pixel value storage unit 1 and a LUT number for converting the pixel from the LUT selection information storage unit 2,
Is used to determine the RGB value of the display color corresponding to the pixel value, and then the RGB value information is passed to the display device 6.

Reference numeral 8 denotes an LUT unit which converts a plurality of finite numbers of LUTs (LUT1, LUT1) for converting pixel values into RGB values.
LUT2,..., LUTn).
It has a function to update the contents of the UT.

Reference numeral 9 denotes a window management unit. The LUT management unit 1 is based on information such as the position, size, and RGB conversion table ID of the window from the window information storage unit 3.
Request the setting of the RGB conversion table to 0 and output the LUT number selected in the LUT section 8 to the LUT selection information storage section 2. The information in the pixel value storage unit 1 and the LUT selection information storage unit 2 is updated as needed.

An LUT management unit 10 sets the contents of the RGB conversion table in the LUT in the LUT unit 8 based on the RGB conversion table ID from the window management unit 9 and sets the set LUT number in the window management unit. Notify 9.

The control in the embodiment shown in FIG. 2 is performed as follows. 1. Control of Window Management Unit (1) The LUT management unit 10
Request the setting of the GB conversion table. At this time, the ID of the RGB conversion table is delivered. (2) As a result of the setting of the RGB conversion table in the LUT unit 8, the number of the LUT in which the conversion table is set is received from the LUT management unit 10.

(3) The number of the LUT received in (2) is
It is stored in the LUT number item in the B conversion table storage unit 4. With this setting, even if there is an RGB conversion table deleted from the LUT, the LUT number in each RGB conversion table in the RGB conversion table storage unit 4 is not changed. Therefore,
Each RGB conversion table contains the currently set LUT number or
Alternatively, a previously set LUT number is stored. (4) In the LUT selection information storage unit 2, this LUT
The number is stored in the range of the window using the set RGB conversion table.

2. Control of LUT Management Unit (1) The ID of the RGB conversion table is received from the window management unit 9 as a request for setting the RGB conversion table. (2) Based on the order in which the LUTs are set from the LUT management information storage unit 5 and the information on the LUT numbers that are currently set or have been set in the past from the RGB conversion table storage unit 4. , The LUT number in the LUT unit 8 for setting the RGB conversion table is determined.

(3) The contents of the designated RGB conversion table are set in the LUT of the number determined in (2). (4) Update the contents of the LUT management information storage unit 5 based on the setting result in the LUT unit 8. (5) The number of the LUT in which the designated RGB conversion table is set is returned to the window management unit 9.

The processing flow in the embodiment shown in FIG. 2 is as follows. (1) When setting an RGB conversion table for a window in the LUT, the window management unit 9 informs the LUT of that fact.
Request to the management unit 10. At this time, the ID of the RGB conversion table is delivered. (2) The LUT management unit 10 stores the LUT management information from the LUT management information storage unit 5 and the LU from the RGB conversion table storage unit 4.
The number of the LUT for setting the designated RGB conversion table is determined based on the information of the T number. The decision method at this time is:
It will be described later.

(3) The LUT management unit 10 sets the contents of the designated RGB conversion table in the LUT of the number determined in (2). (4) The LUT management unit 10 updates the contents of the LUT management information storage unit 5 according to the setting result of the RGB conversion table. (5) The LUT management unit 10 returns the number of the LUT in which the specified RGB conversion table has been set to the window management unit 9.

(6) The window management unit 9 receives the number of the LUT in which the RGB conversion table is set from the LUT management unit 10. (7) The window management unit 9 stores the LUT number received in (6) in the LUT item of the RGB conversion table storage unit 4. (8) The window management unit 9 stores the LUT number received in (6) in the range of the window using the set RGB conversion table in the LUT selection information storage unit 2.

In the embodiment shown in FIG. 2, the LUT management unit 10 determines the LUT number for using a plurality of finite LUTs according to the following rules. (1) When there is an LUT whose content is not set, the LUT number is determined by sequentially selecting the LUT with the smallest number. (2) If the contents are set in all LUTs,
Select the oldest set LUT number and select its LU
A new RGB conversion table is set for T. (3) When the RGB conversion table that has already been set is set again, the same LU as the previously set LUT is used.
Select T.

[0040]

As described above, according to the present invention, a pixel value corresponding to the brightness of each point of a screen divided into a plurality of windows is converted and displayed by a different RGB conversion table for each window. Since a limited number of LUTs are managed and displayed in a color display device, the display can be physically realized even when a large number of windows are generated.
At this time, since a plurality of LUTs are used, the display colors of the windows can be normally displayed within the range.

At this time, the usage history of the LUT management information storage is stored, and the LU to which the RGB conversion table is to be set based on this is stored.
Since the T is determined, the contents are updated from the oldest set LUT, and the recently used RGB conversion table is
By leaving in T, a finite number of LUTs can be used efficiently.

Further, according to the present invention, since the setting history of the RGB conversion table is stored, when the RGB conversion table deleted from the LUT is reset, it can be set in the same LUT. There is no need to change the LUT selection information for each point on the screen.

According to the present invention, since a history indicating which RGB conversion table is set in which LUT is stored for each RGB conversion table, it is necessary to prepare a large amount of storage area for storing the history. , And can be easily checked for each of the RGB conversion tables.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration of the present invention.

FIG. 2 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 3 is a diagram illustrating contents of a window information storage unit;

FIG. 4 is a diagram illustrating contents of an RGB conversion table storage unit;

FIG. 5 is a diagram illustrating contents of an LUT management information storage unit;

[Explanation of symbols]

 2 LUT selection information storage unit 4 RGB conversion table storage unit 5 LUT management information storage unit 6 Display device 7 Display unit 8 LUT unit 9 Window management unit 10 LUT management unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) G09G 5/00-5/42 G06T 1/00 510 G06T 1/20 G06T 11/00 110

Claims (4)

(57) [Claims] 1. A window is divided into arbitrarily divided windows.
LUT selection information storage unit for storing a corresponding LUT selection value
And a plurality of LUTs, each of which has a pixel value of RG
An LUT unit for storing an RGB conversion table for converting to a B value;
RGB conversion in the LUT selected according to the selected value
RGB values corresponding to the pixel values of each point on the screen based on the table
And a display section for outputting the color on the screen according to the RGB values.
-Display color control device provided with a display device for displaying
Te, provided a window management unit, set in each window on the screen
Specify the RGB conversion table to be specified and provide LUT management unit
In the LUT section, corresponding to the specification of the RGB conversion table,
RGB conversion table to any of a finite number of LUTs
A display color control device having a configuration for setting . 2. The display color control device according to claim 1,
In this case, the RGB conversion table set in the LUT and the
LUT management information indicating the order in which the LUTs were set is described.
An LUT management information storage unit for storing the LUT management information;
Sets an RGB conversion table based on the LUT management information.
A display color control device having a configuration for determining a power LUT . 3. A display color control device according to claim 1, wherein
The setting history of the RGB conversion table in the LUT
An RGB conversion table storage unit for storing the LUT management unit;
Has a configuration in which an LUT for which an RGB conversion table is to be set is determined based on the LUT management information and a setting history for the LUT. 4. The display color control device according to claim 3, wherein
The RGB conversion table storage unit stores the LU of the RGB conversion table.
A display color control device having a configuration for storing a setting history to T for each RGB conversion table .