TW546620B - OSD controlling method - Google Patents

Abstract

An OSD controlling method is disclosed, which comprises: storing a picture data corresponding to a displayed picture by using a display buffer; storing the OSD data corresponding to a displayed picture comprising an OSD picture by using a memory; and writing the OSD data into the register unit corresponding to the OSD picture in the display buffer.

Description

546620 V. Description of the invention (1) The present invention is about-a kind of _ control method and a kind of method to store 0SD data in 鼗 千 切 六 "▲ inch⑺ 疋 has a relevant method. 颂 It is not a temporary storage state to achieve the establishment of 0SD display area 〇SD can usually display screen parameters, providing users to make further adjustments. Common people such as brightness, hue, brightness, saturation, contrast, horizontal size (H-size) ), Horizontal position (H_phase), vertical size (v — size), vertical center (v-center), pin cushion (pin_cushi〇n), etc. As the types of computer graphics and video data are more and more, and The more complicated the control selection conditions are, the more complicated the hardware circuit of the control must be. The hardware-oriented 0SD is no longer sufficient. Figure 1 shows the conventional display with the 0SD display function. In Figure 1, the block diagram of the video circuit section. In Figure 1, R (red), G (green), and B (b 1 ue) respectively represent the three primary color signals transmitted by the day frame register 11 〇, which are What you want under normal conditions Displayed image signals. In the normal display state, the R, G, and B signals pass through the mixer 130 and the output buffer 160 and are sent to the display panel 170. The signals used to control the display position include The horizontal synchronizing signal (HSYNC) and the vertical synchronizing signal (VSYNC). The horizontal synchronizing signal (HSYNC) and the vertical synchronizing signal (VSYNC) are both pulse signals. The short interval of the horizontal synchronizing signal (HSYNC) is used to define each One horizontal scanning line, the vertical synchronization signal VSYNC pulse wave interval is long, used to define a picture frame containing a plurality of horizontal scanning lines.

0702-6740TWF; 90P74; rilu.ptd page 4 546620 V. Description of the invention (2) When the user triggers the 0SD display function, the microcontroller in the display reads the character data to be displayed from EEPR0M and sends it to SD In the circuit 120, three color signals Rosd (red), Gosd (green), and Bosd (blue) corresponding to the OSD display area are generated. As shown in the figure, the 0SD circuit 120 sends the R0sd, Gosd, Bosd k numbers and the mask signal BLANK—and sends them to the mixer 130. The blanking signal BLANK is used to define the range of the SD display area on the screen. That is, when no signal BLANK = 1 indicates that the area currently being displayed is the normal display area, the mixer> will turn off R0sd, Gosd, and B. 〇sd character data, and R, B signals ^ input and output buffer 16〇; when the mask signal is eight = = indicates that the display area is 0 SD display area, the mixer will turn off R, G, The B signal is input and output buffer 16 by the character data of Rosd, Gosd, and Bosd. The mask signal BLANK is determined by the OSD mask circuit 80 according to the relative timing relationship between the horizontal synchronization signal HSYNC and the vertical synchronization signal vsm. . Also = 疋 Determine the corresponding _display area by determining the scan line range = 2Exemplify 'If the 240th scan line is defined as the _display area m position, and the _display area is 12M scan lines high, then osd cover No power = Λ is calculated from the appearance of the vertical synchronizing signal mNC, and reaches the position of the 24th image, starting to output the masking signal BUNK = 0, and to the position of the 36th position, 'starting to output the masking signal BLANK = 1. ”When using multiple 0SD data,‘ the hardware 0sd circuit is lacking.

Kl o'sn: When the hardware circuit is consumed, and the production cost also increases, the above-mentioned method of knowing 30 is performed by a specific circuit, such as random access% read-only memory (_) record _ data, and vertical synchronization by ° Signal occurrence time, output 0SD data difference

546620 V. Description of the invention (3) '' ---- `` Domain '' full-line hardware circuit-oriented method can not provide various usage modes when displaying multiple at the same time, such as providing 3 丨 1) in the SD display area. Blended or co-key-keying. In view of this, the main purpose of the present invention is to provide an application-oriented 0 SD control. ^ According to the above-mentioned object, the present invention proposes a method for controlling 0 SD, including using a The display buffer is used to store daytime data, which corresponds to one display: once; use a memory to store 10SD data, which corresponds to the 0SD picture contained in the display I side; using a data processing method, Write the above 0SD data into the temporary storage element corresponding to the above 0SD picture in the display buffer. Brief description of the dry drawing: In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, the following is specifically enumerated A preferred embodiment is described in detail with the accompanying drawings as follows: Fig. 1 shows the display intent of the first example of picture function adjustment in the conventional technology. Fig. 2 shows the daytime display of the display in the embodiment of the present invention. . Adjustment of a system block diagram showing a flow chart of FIG. 3 embodiment of the present invention to make a display of the day function to adjust the surface of FIG. 4 represents a plane view of the day of the functional simulation mode embodiment of the present invention Description of Symbols.:

54662〇, description of the invention (4) 10 ~ screen area; 1 4 ~ key function screen 2 2 ~ key area; 30 ~ microcontroller; 3 4 ~ adjustment circuit; 1 ~ display; 1 2 ~ day surface; 2〇 ~ Control panel; 2 4 ~ function indication area 32 ~ PWM circuit; 36 ~ display bias line; 38 ~ OSD; 40 ~ display image circuit; 42 ~ memory. Steam Example: The method for controlling the display SD function of the present invention is mainly copied in the SD display buffer, and the number of SD windows is no longer limited to the implementation of SD system. The number of OSD can be more Flexible execution. The driver has flexible memory. 0SD is used in the display buffer. It is known that direct block transfer (bitblt * video overlay) can be used in this method without special features. 0SD circuit. To make the presentation of 0SD more diverse, direct block transfer and video overlay can be applied to this method. Another method of this method can be completed by using the current hardware architecture, which does not require Add new hard = 2. This figure shows the implementation of direct block transfer in this embodiment. The block of 0 cents includes: 2 and 4. As shown in the second figure, basically, execute 0 Shan interface card 100 packs 42 θ _ 42 display No buffer 20, microcontroller 30. Memory 40, 60; display;: = SD content. The device that displays the daytime display includes a display screen, and does not drive the circuit 5... A memory area in the computer department using a boat 66 thd AA ', 546620 Instruction (5) (SRAM) and slower dynamic random access memory (DRAM). · Each $ memory unit (such as bit dbyte) in = 20 is stored separately and should be stored on a certain display 60. Image point data. The memory area 22 in Figure 2 shows the correspondence between the 0SD data stored in the display buffer 20 and the display screen 6 ° 0: 〇sd day surface 62. The microcontroller 3〇 is According to the enable state of the direct block transfer flag, perform a direct block transfer (bit bi0ck tr ^ sfer bitMt), and write the SD data of the memory 40, 42 into the memory area 2 2 0. Figure 3 shows this In the embodiment, a block diagram of video SD is implemented by video overlay. As shown in FIG. 3, basically, the interface card 100 that executes video SD includes memory 40, 42 display buffer 20, and microcontroller 3. Memory 40, 42 Use ^ to store OSD content. Video overlay register 32 is used to store video overlay. The required display parameters such as window control, color control, and chroma control display screen include display screen 6. 〇 Display drive circuit 50. Display buffer 20 is a memory area 'on display buffer 2 A memory unit (such as byte, byte) 'is divided into t ^ 60 ^ ^ t ^ 24V; Λ does not have a video of buffer 20 overlapping OSD data and ⑽ 2 on the display screen ί zm: ③ΐ. According to the video overlap status, the video overlap is performed. According to the video overlap temporary storage capital, the memory area 24 is set as a video overlap window, and the memory SD card material and the picture data in the memory area 24 are compared. The weighted operation produces med signal, which has the effect of 0sd display image fade in and out, and enters the memory area 24.

0702-6740TWF; 90P74; rilu.ptd page 8 546620

FIG. 4 shows a flowchart of the OSD control method in this embodiment, that is, a flowchart of a control program in the microcontroller 30. In FIG. 4, first, the microcontroller 30 determines whether the OSD is in an enabled state (S2 0). If the OSD is in an enabled state (S21), it determines whether the content of the 0SD needs to be updated (S22), and if necessary, then Update the OSD content (S23), otherwise judge whether the video overlap is enabled (S24), if the video overlap is enabled, set the direct block transfer flag (S25), and copy the memory by direct block transfer The OSD contents of 40 and 42 are stored in the display buffer 20 (S26). If the video overlay is not enabled, set the video overlay flag (s 2 7), set the video overlay window (S28), and set the video overlay register (S29), so that the video overlay provides OSD (S30). If the OSD is in a non-enabled state, determine whether video overlap has been used (S31) 'If video overlap has been used, remove the enabled state of the video overlap (S 3 2) and eliminate the video overlap flag (§ 3 3) If no video overlay is used, then it is judged whether to use direct block transfer (s 3 4). If direct block transfer has been used, the screen display data of the temporary storage unit used for direct block transfer in display buffer 2 will be restored. (S35), clear the direct block transfer flag (S36), and return to the general day-to-day display operation (§37). In order to make the display of the OSD more diversified and more flexible, more different one-dimensional direct block transfers and video overlays can be applied, such as a 1 pbua — blended bitblt 'transparent bitblt, color keying, etc. 0 Although the present invention The above is disclosed in a preferred embodiment, but it is not intended to limit the present invention. Any person skilled in the art will not depart from the spirit of the present invention.

0702-6740TWF; 90P74; rilu.ptd

546620

0702-6740TWF; 90P74; rilu.ptd page 10

Claims (1)

54662〇 Profit range " " '~' "-_ 1 · A method of controlling OSD, including: using a display buffer to store a picture data, which corresponds to a display picture; using a memory, Store a 0SD data, which corresponds to a 0SD diurnal surface included in the display screen; and, using a data processing method, write the above 0sd data into the temporary storage unit corresponding to the 0SD screen in the display 'punch. 2. The control SD method as described in item 1 of the scope of the patent application, in which the upper body processing method is direct block removal. 3. Control the SD method as described in item 1 of the scope of the patent application, wherein the above processing method is video overlap. 4. The method for controlling OSD as described in item 1 of the scope of patent application, which includes the following steps: ', determine whether the OSD function is enabled; H, if the above OSD function is enabled, determine whether the OSD data in the above memory has changed; Bedin. If the above 0SD data is changed, determine whether the video overlap is enabled. If the above video overlap is enabled, set the direct block transfer flag b to copy the above 0SD data in the above display buffer 1 in the above display buffer 1 and the 0SD day The temporary storage unit corresponding to the surface; ° If the video overlap is not enabled, set the video overlap video and set the video overlap register; enable the video overlap; if the 0SD function is disabled, display the 0SD picture; determine whether the video overlap is 546620 VI. Enabling the scope of patent application; if the above-mentioned video overlap is enabled so that the above-mentioned video overlap is disabled; clear the above-mentioned video overlap flag; if the above-mentioned video overlap is not enabled; judge whether the direct block transfer is enabled; if If the direct block transfer is enabled, the screen data of the temporary storage unit corresponding to the 0SD daytime surface in the display buffer is restored; and the direct block transfer flag is cleared. 5. · A method for controlling OSD, including the following steps: judging whether the OSD function is enabled; if the above OSD function is enabled, determining whether the OSD data in a memory has changed; if the above OSD data is changed, it is judged that the video overlaps Whether it is enabled; if the above-mentioned video overlap is enabled, set the direct block transfer flag; use the direct block transfer to copy the above SD data in a temporary storage unit corresponding to the 0SD picture in a display buffer; if the above video overlap is not Enable, set the video overlay window; set a video overlay register; enable the video overlay and display the above SD picture; If the 0SD function is not enabled, determine whether the video overlap is enabled; if the video overlap is enabled, clear the video overlap flag; if the video overlap is disabled, the video overlap is disabled; 'Judge directly Whether the block moved 0702-6740TWF; 90P74; rilu.ptd page 12 546620 VI. Enable for patent application scope; If direct block transfer is enabled, restore the above daytime surface of the temporary storage unit corresponding to the above 0SD daytime surface in the display buffer Data; and clear the above-mentioned direct block removal flag. « 0702-6740TWF; 90P74; rilu.ptd page 13