TW554308B - Flat panel display and driving method thereof - Google Patents

Abstract

The present invention is directed to a flat panel display device and a driving method thereof. According to the present invention in the flat panel display for processing and displaying a display signal outputted from the graphic source via a serial bus, the graphic source fetches and interprets the display characteristics information of the flat panel from the flat panel display module via the serial bus so that a new corresponding standard of display signal can be outputted. Here, the display characteristics information is alterable by the input of predetermined data by use of a predetermined key installed outside the flat panel display by a user and includes more than one of standard information of the display signal with its blanking interval defined and screen display information. A flat panel display according to an embodiment of the present invention is essentially comprised of a graphic source including a graphic source unit; and a liquid crystal display module including a connector, a D/A converter, a memory, and a timing controller.

Description

554308 A7

〇) Background of the invention The present invention is generally about a one-dimensional w_ _ ^ Tan plane is not good, and even more particularly, is used to drive the plane to show crying Zhuang Zuoling system buckle. Device and method. (b) Relevant technical descriptions Common commercial flat-screen displays + "" Bei Bu-yin includes liquid crystal display (LCD) and plasma display panel (PDP), in addition to the ice a J electric water display private consultation, has been developed The display unit is a cold light (EL, scientifically called electro-excitation light) display. The flat panel has a flat panel with pixels arranged in a matrix pattern between two glass substrates, and a flat panel for driving the flat panel. CB (p brush circuit board) module, and a housing for protecting and integrating the flat panel and PCB module. As shown in Figure 1 describing the complete circuit structure of a common flat display module, it is used to drive 1 > (: 6 modules of the flat panel 40) include an ipcB0, a row of drivers 20, and a row of drivers 30, where the main pCB 10 is used for receiving from an external device like a pc to be received by a Synchronous signals and other RGB image data processed by the timing controller T-con of the custom integrated circuit in the FPGA type (flat pin grid array) are processed so that the image data and multiple control signals are based on the flat panel 40. Resulting from the architecture, this column drives The driver 20 is used to provide scanning signals for receiving the power signal 51 of the autonomous Pcb 10 and the column signal lines based on the column drive control signal 50. The row driver 30 is used for receiving the grayscale voltage 61 and processing in the main PCB. The control signal 60 and the image data provide a gray-scale voltage 61. However, because the traditional driving circuit implemented on the main PCB 10 has a cover -4- this paper size applies to the Chinese National Standard (CNS) A4 specification (210X 297 mm) PCT) 554308 V. Description of the invention (Sequence structure, in which the timing and various inputs = specify the specifications to be consistent with the panel, it is impossible to rely on: == the operation and timing of the road. In other words, “modify the driving power with culture” It is fixed, that is, the operation and timing of the moving circuit is fixed and even if it is within the range of possible operation, it still does not = obvious: feature two optimization 'unless it is in the drive circuit by hardware options. &Amp; It is because the timing conditions of the input of the flat panel display are basically = :? VESA specifications are set and based on the flat panel display module stored = digital-shell communication ⑽c) information source-image source generation and display number-surface two Sequence control letter In order to drive the panel. In addition, the flat display monitor products on the market set the gamma voltage and different power to distinguish the gray. According to traditional techniques, a user can use the on-screen display (0sd) function to confirm and adjust Screen display status or adjust hardware directly to adjust gamma voltage, flicker voltage, brightness, scale, frame rate control (FRC), 1 / 〇 format, etc. However, using only these functions, although an optimal screen can be borrowed By modifying the timing on the flat panel driver circuit (modification of the driving frequency or the modification with the minimum and optimal flash time) or a very good driving environment can be achieved by processing standard signals in the image source via additional circuits It is possible to modify the driving frequency or modify it to the minimum and optimal blinking time. As cited above, because an I / O format is required to meet the requirements for general display standards, no matter how good the above conditions are, the risk of modification is very high. . In addition, in particular, an interface is required in a monitor to drive different display source I / O formats, and if there is a difference in the field frequency or the number of flashing intervals', an additional FRC adjustment should be supported System board (such as -5- This paper size applies to China National Standard (CNS) A4 specifications (210 X 297 mm) 554308

A / D board, D / D board, etc.). J Furthermore, the I / O format of flat-panel displays is limited and the efficiency of display products cannot reach the leg. In addition, the incompatibility between the kite generated by the option board and the bidirectional interface conditions leads to inferior image quality and little help in optimizing the characteristics of the monitor product. · / — T artifacts (fixation) are generated by the difference in the display mode of the CRT monitor. The driving frequency of the CR seat is 40 Hz to 85 Hz. The driving method of the flat panel display is reversed. In other words, the characteristics of the front panel are optimized. For the sake of t, the driving conditions at 60 Hz must also be optimized. In addition, since the image card or display source does not fully use the vesa standard, different manufacturers provide data with various timings, where various timings are slightly different from the standard timing due to slight deviations. Therefore, when the timing of the optimal driving conditions of the flat panel should be different from the timing of the VESA mark or the standard signal has a slight deviation due to different manufacturers, even if an additional option board is used to adjust the variability timing, Not enough to fully perform the above functions and additional boards increase costs. In addition, the blank space (horizontal synchronization signal, rear entrance, front entrance) used to restore the next line after the line of the electron beam is scanned with a standard such as the VESA standard input timing of the CR Ding scan, And a blank space (vertical synchronization signal, back side entrance, front side entrance) restored from the last position with the scan-field to the first position is specified for each frequency. However, due to the fact that architectures such as active matrixes that are different from scanning architectures are driven by flat panels, at the end of the transfer field or line -6- X 297 mm) Itffi tig? _ (CNS) 554308 A7 ----— B7_ V. Description of the invention (4) '-----— After displaying no signal, a blank interval will only have the minimum number of pixels (example of horizontal blank) or line (example of vertical blank) Generally, there are many blank spaces, which are different from: handing. In addition, by using this type of option board such as A / D board, when the operating frequency is increased and the I / O becomes unstable due to the unnecessary blank space in the VESA condition, the driving conditions of the flat panel also become Quite unstable. Therefore, it is necessary to enable the flat panel to be driven by reducing the above-mentioned blank timing at an optimal driving timing condition, so that the display characteristics become stable and the reliability becomes good. In addition, there are instances where the display characteristics must be adjusted based on product tolerance or user circumstances and conditions. Because these flat-panel monitor products are traditionally set based on the characteristics of flat panels with fixed optimal driving conditions, they should be adjusted by additional option boards or interface panels. However, by adjusting the gamma, contrast, brightness, flicker, and other display characteristics, when modifying the optimal driving conditions fixed according to the characteristics of the flat panel, there will be characteristics of the flat panel due to the higher contrast and The lower gray scale is in line with the problem that the flat panel in the shortened state can be used with 100% efficiency when the A / D board or option board is used. Therefore, it is necessary to provide a basic driver architecture that eliminates the cost increase due to the use of option boards and avoids the kite caused by mismatched interface conditions. In other words, it is necessary to promote the modification of the information on FRC, 1/0, and other display characteristics in order to make the resolution information, the vertical and horizontal frequencies of the pattern signal, and the operating frequency of the main frequency of the image signal sink, And digital information such as gamma voltage, flicker voltage, and brightness value can be shared by the image source and the flat display module can be used by the user. This paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public) Dong) 554308 V. Description of the invention (5 to be updated. In particular, the blank space and subsequent farm ^ are used as standard signal signals and in their signals, it is necessary to drive the flat-panel display with the image modified by the earth map = defined frequency order. &Quot; It is used to the maximum to make it suitable for taking into account the above problems. The purpose of Shi Jie 3, Mao Ming is to provide a wide and flexible interface Gu + Wu a # 1 ^ ^ ^-..,. ”Σ and eight driving methods make I / O timing and j: it can store and share the characteristics of the standard DDC function of the IJD”, in the mobile device and can be used-with VESA item. Moon Dagger , j ^ Scheduling and uploading without additional selection is required to achieve this goal. According to one aspect of the present invention, a flat-screen display is characterized by the digital image information disk system and the system is directly received via a serial bus. ^ Image source and digital image information and control signals suitable for facial signs are generated to a screen display. According to another aspect of the present invention, a flat display includes a memory, and the memory system is used to store data from the serial bus directly. Digital display information input by an image source; a timing controller for reading display information and output driving signals from a memory suitable for a corresponding flat panel, based on the digital received from the image source Display information; a data driver, which is used to output the image signal to the data line, based on a plurality of signals received from the timing controller; and a scan driver, which is used to output the control signal to the gate Line, based on a plurality of signals received from the timing controller. The digital display information preferably includes a plurality of A flat panel of the present paper -8 applicable China National Standard Scale (CNS) A4 size (210 X 297 mm) 554308 A7

Type of signal. The display information is preferably changed by a predetermined L number output from the image source to the serial bus, based on input from a user with predetermined data using a predetermined program. Number: The display information is preferably changed by a user with predetermined data by a predetermined button installed outside the flat panel display. With the above construction of the present invention, when used to process and display a display signal output from an image source via a serial bus, the image source captures and interprets via: the flat bus from the flat display module The display panel can display a new corresponding display signal standard. Here, the display feature: Be Λ is changed by inputting predetermined data with a predetermined button installed on the outside of the flat display by the user, and contains standard information and screen display information of "displayed signals" in more than a blank space. In one aspect, a method for driving a flat display includes the steps of: storing digital display information directly inputted from an image source via a serial bus; and reading a display suitable for a corresponding flat panel from a memory Information and output drive signal, based on digital display information received from the image source; output image signal to data line, based on drive number · and output control signal to gate line, based on drive signal. Brief description included in the specification Intermediate construction-the attached drawings of some specifications describe specific embodiments of the present invention, and are used to explain the principles of the present invention in conjunction with the description. Figure 丨 shows a block diagram illustrating the completion of a common flat display module.

Hold

Line • 9 ·

554308 A7 B7

FIG. 2 shows a block diagram illustrating an image source and a flat display module according to a specific embodiment of the present invention. Fig. 3 shows an embodiment of a display signal generated from an image source according to the prior art. Fig. 4 shows an embodiment of a display signal generated by an image source according to a specific embodiment of the present invention. Fig. 5 is a graph showing the change in gamma when a palette is used according to the prior art. FIG. 6 shows a coordinate diagram of a gamma change when a display feature is adjusted via a serial bus according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. As shown in FIG. 2, a liquid crystal display (a flat display) according to a specific embodiment of the present invention basically includes an image source 3 00 including an image source unit 3 1 0 and a connector 41 〇, a d / a converter 420, a memory 430 and a timing controller 440 LCD module 400. Here, the liquid crystal display according to the present invention can realize the function of the conventional option board and further '. Although the option board is removed, it can realize more functions than the conventional option board, thereby reducing the cost. In addition, although the present invention does not require the use of a conventional palette ', it does not hinder all the features of the invention. The image source unit 3 1 0 is a part of the image source 3 0. The image source 3 0 is a PC main body or another system that outputs an image signal, and the function of the image source unit 3 i 0 is to generate A device that outputs synchronization signals, image signals, and other control signals. In particular, by grabbing and interpreting through the serial bus -10- this paper W㈣ Chinese national standard (_ A4 specification (21G x 297 public |)

Binding

Line 554308 A7

From the liquid crystal display panel (flat panel) of the flat panel display module, the image source unit 310 outputs a new corresponding display signal standard. The connector 410 is for a device such as Dvi (digital video). D- The connector of the serial bus of the SUB is used to receive the display from the image source unit 31 of the image source such as the PC via the boundary 3 and the old γΐ2. The D / A converter 420 will be stored in the memory. The screen display information included in the display and dry feature information of the LCD panel within 43 ° is converted into an analog signal. In other words, in a display feature information of the LCD panel that can be adjusted by the user, it is received as a digital data type such as Gamma voltage, flicker voltage, and brightness ^ display information on the screen, and then convert it into analog data to the corresponding pcB module circuit. Here, a series of the above-mentioned operations and the operation of common LCD monitors are performed by the timing controller 440 It is executed under the control. The memory 430 stores display characteristic information of a flat panel that can be modified by a user and shared with the image source unit 31. Here, the display characteristics of the liquid crystal panel The information is standard information of the LCD panel, which includes resolution and operating frequency such as the vertical and horizontal frequencies of the image signal and the main frequency of an image signal for driving the LCD panel and the gamma voltage, flicker voltage, brightness, etc. Digital information that can be adjusted by a user. The timing controller 440 receives and processes the display signals from the image source unit 3 10 via the serial bus to output the display signals for driving the liquid crystal panel. In other words, these correspond to the liquid crystal The display characteristic information of the panel, such as the image signal, control signal, etc. The display signal of the LCD panel is output to the circuit of the corresponding PCB module. -11-This paper size is applicable to the Chinese national standard (CNprint A4 specification (210 X 297 public) (Centimeter)

Binding

Line 9 V. Description of the invention (now 'will explain the operation of the liquid crystal display in detail. The first embodiment of the present invention is constructed' and a CRT capable of driving a field frequency from 40 Hz to 85 Hz ( Cathode ray tube) is different. J Tian Yu, driver of night and day thousand face display 2, if the current panel characteristics are optimized at 60 Hz, the timing controller must be made at 60 Hz. 〇 Temple = Optimization of driving conditions. Generally, when the monitor is displayed, the liquid crystal plane display = core of the device, and 400 from the image source 300 receives the No. 4 fixed in, for example, a standard signal and uses an option board. The time sequence controller processes it to adjust the FRCW / O format, etc. to a certain range. However, the signals output from the general image source 300 have not been adjusted themselves? 11 (: or 1/0 format, etc. In particular, Because the long blank space is only needed when scanning CRT systems, not for displays with active matrix systems such as LCD flat-panel displays using digital signal processing, remove the long blank space to a maximum extent to each drive LCD panel. Advantages. In the liquid crystal display according to a specific embodiment of the present invention, the operation procedure for adjusting the FRC or 丨 ... format and the blank space by using the signal output from the image source itself instead of the option board is explained. Figure 2 shows the operation of a liquid crystal display according to a specific embodiment of the present invention. First, when a power supply for the entire operation is turned on, the display characteristic information of the liquid crystal panel stored in the memory 430 is DDC information. The type is transmitted to the image source unit 31 through the serial buses 411 and 412. The power supply is provided by the liquid crystal flat display module (or monitor) 400. -12- This paper size applies to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) -------- 554308 A7 ______B7 V. Description of the invention (1〇) έ ハ LCD flat-panel display module 400 is via cable 3 丨 丨 and 3 12 and dvi Or the D-SUB connector 410 is connected to an image source 300 such as a pC body, etc. The image source unit 3 1 0 interprets this information to provide various corresponding interpretations via the cables 3 丨 丨 and 3 丨 2. Result display signal to liquid crystal At this point, unlike the conventional technology, the display characteristic information of the liquid crystal panel is included between the memory 43 of the liquid crystal flat display module 400 and the image source unit 3 100. The DDC information of the common drought. The display characteristic information of the LCD panel can be modified by a user using a predetermined application, and the modified or updated information is then stored in the memory 43. When the LCD is turned on next time At this time, the image source unit 3 10 captures and interprets the updated information in the memory 43. In other words, the user suggests the best conditions suitable for the LCD panel to the image source 300 so that the image source unit ( PC or other display systems) 31. You can directly adjust an input timing. Here, τ is modified by a user ’s application with a spear representation. The LCD display panel features #FRC, 1/0 format, and other on-screen displays (brightness, gamma, flicker, etc.). Degrees, etc.), as described above. In particular, since the blank space even in the standard image signal is adjustable, the liquid crystal display module operates entirely with the new standard signal instead of the VESA standard signal. In other words,-the traditional display signal generated by the image source unit 310 includes a synchronization signal part ㈣, _back side entrance_, a part carrying image data (⑪), and front side entrance)) and a compilation / U 和 /, characterized by § 海 背 side entrance (⑤) slightly

Longer than the front entrance (⑧), as shown in Figure 3. 2 Seven I circle. On the other hand, when the blank interval is adjusted according to the specific embodiment of the present invention. Π Wang inch carries the part of the image data -13- 554308 A7 _____ B7 5. The description of the invention (11) ©) is more It is long and has a synchronized signal path), a back-side entrance ②) and a front-side entrance (⑩ occupies a suitable part, which is as narrow as the part required to process the signal used to drive the LCD panel, as shown in Figure 4 The use of a predetermined application to adjust the blank area means the standard information of the displayed signal, that is, the part carrying the image data (@), the synchronized signal part (⑤), the back side entrance ⑽, and the front side entrance (§)) The time is defined so that the image source unit 3 10 generates a new display signal standard. As described above, when the memory 430 is updated with new display characteristic information, the image source unit 310 captures and interprets this information so that a corresponding display k number is generated to be transmitted to the liquid crystal flat display module 4 〇〇 . At this time, because the transmitted display signals are shared by the D / A converter 420 and the timing controller 440 via the serial buses 411 and 412, the timing controller 44 controls various control signals and image signals required for driving the LCD panel. The circuit is provided to the corresponding PCB module via the wire 44. The d / a converter 42o converts digital data of gamma, flicker, and brightness status, and supplies it through a wire 42i under the control of a timing controller 44o based on display characteristic information stored in the memory 43o. Corresponding circuit of PCB module. As mentioned above, when a user uses a predetermined application to adjust the screen display (brightness, gamma, flicker, etc.) data that represents the display status of the screen, traditional OSD functions can be processed digitally instead of A. An additional option board for the / D board is implemented to enable the single gamma function of the LCD panel over the entire area. That is, as shown in FIG. 5, in the case of using a conventional option board such as an A / d board, according to the circuit characteristics, the gray scale of the standard gray change (R) is missing near the highest gray scale when the brightness is adjusted. , And when adjusting the contrast, -14-IX 297 mm) 554308 A7 --- ____ Β7 V. Description of the invention (12) '^ ~' ~ (B) The gray level near the lowest gray level is missing. However, according to the digital processing of the present invention, although the brightness (C) and contrast are adjusted as shown in FIG. 6, the gamma change close to the standard gamma change remains unchanged, and the display function of the liquid crystal panel can therefore be used. To the highest level. On the other hand, although a user can adjust the display characteristic information representing the screen display status with a predetermined application program, this can also be implemented by using a preset button installed on the outside of the LCD display in combination with a predetermined data from a user. Supported 0Sd function in all monitors. As described above, according to a specific embodiment of the present invention, since there is a liquid crystal display for processing and displaying a display signal from the image source unit 3 10 via a serial bus, the image source unit 3 10 captures and interprets A new corresponding display signal standard can be output through the serial bus from the display characteristic information of the liquid crystal panel of the liquid crystal flat display module 400. Here, the display characteristics of the liquid crystal panel can be set by a preset button installed on the outside of the liquid crystal display through input of predetermined data from a user and output from the image source unit 3 j 〇 to the serial bus. The predetermined signal is changed to correspond to the input of predetermined data from a user by the use of the predetermined program. The description about the liquid crystal display according to the specific embodiment of the present invention is applicable to general flat display. Except for the liquid crystal display, the driving mode in the p C b module is similar to the organic cold light (el) and Plasma Display Panel (PDP). As apparent from the above description, driving the flat panel display according to the present invention can eliminate the cost increase caused by using the option board and substantially suppress the occurrence of the kit due to inconsistent interface conditions. -15- This paper size applies to Chinese National Standard (CNS) A4 (210 X 297 mm) 554308

Similarly 'because the image card used for the monitor or the display card is connected via the serial bus of the I / ΓΓΛΛ / ㈣ cable connector or in the bus by grasping the driving conditions of the flat panel in the -1 / 〇 format Information Search ". "Interface" conditions or the setting value of an optimization condition defined by the user through adjustment or the display source needs 1 / (3 timings to be transmitted to the flat panel and the display timings required by the display source can be set, so Image signals are supported by any standard other than VESA timing conditions. In particular, with the same display resolution and the same shelf frequency, 'can drive flat panels at drive frequencies lower than the Vesa standard' Improved display characteristics due to zooming in time for processing pixel data or charging time for pixel display. The timing of the optimal driving conditions of the flat panel must be different from the timing of the VESA standard signal or the standard signal depends on the manufacturer When there is a slight deviation, the input and output timing of the serial bus (pc bus, SPI bus, three-wire bus, etc.) interface through the timing controller can be freely adjusted and shared by the DDC display information. The timing information of the data set values stored in the memory allows the correct input / output information to be stored, continuously updated and changed in the external environment For continuous adjustment, it is possible to change the driving conditions without using additional option systems (such as A / D board with scaler, Dsp, and FRC functions) to control 〇〇 (: display information, leading to monitor products Safety feature in timing margin. In addition, the gamma in the display feature is fixed at a target value by a fixed voltage generated by a resistor or by an external voltage division method. This makes the entire grayscale gamma The degree cannot be adjusted when using the A / D board or other relay interface to adjust the contrast or angle. However, the present invention applies the Chinese national standard (C ^ i ^ 210 X 297 mm) via the serial bus • 16-G scale )

Binding

554308 A7

By setting a voltage freely, the desired brightness can be adjusted with the efficiency of the flat panel brightness of 100% without changing the grayscale characteristic level of the product. Furthermore, the value set or adjusted by a user as required by the image source is stored in a storage 'such as memory shared via a serial bus, so that the status and information of the monitor products are shared and adjustable, And the best display characteristics information can be managed by an upload / reload operation. Although the preferred embodiments of the present invention have been described in detail above, it should be clearly understood that a number of variations and / or modifications of the basic inventive concepts known to those skilled in the art and guided here will fall within the scope and scope of the present invention. Within the spirit 'is defined by the scope of the attached patent application. -17- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

Claims (1)

554308 ΆΤ. No. 090125779 Patent Application Chinese Application for Patent Scope Replacement (March 1992) --- ~ —— Description of the Invention (1 · A flat display, which includes: 1 memory, which is used to store the serial confluence A digital display information input directly from an image source; a timing controller, which is used to read from the memory suitable for a display information corresponding to a flat panel and based on the digital display information received from the image source Output driving signals; data drivers' for outputting image signals to the data line based on a plurality of signals received from the timing controller; and a scan driver for controlling the signals based on a plurality of signals received from the timing controller The signal is output to the gate line. 2. The flat display as described in the first item of the patent application scope, wherein the memory system is a non-volatile memory. 3. The flat display as the first item of the patent application scope, where the digital display information includes A plurality of signal types suitable for a plurality of flat panel. 4. A flat display as claimed in the first item of the patent scope, wherein the digital display The information is changed by a predetermined signal output from the image source to the serial buses based on input from a predetermined data user using a predetermined program. 5. If the flat display of the first scope of the patent application, wherein the The digital display information can be changed by an input from a predetermined data user through a predetermined button installed on the outside of the flat display. 6. A method for driving a flat display, comprising the steps of: Digital display information input by an image source; This paper size applies Chinese National Standard (CNS) A4 specifications (210X 297 mm) 554308 A7 B7 V. Description of the invention () Based on the digital display information received from the image source, self-memory The body reads display information suitable for a corresponding flat panel and outputs driving signals; based on the driving signals, the image signal is output to the data line; and based on the driving signals, the control signal is output to the gate line. -2 -This paper size adopts Chinese National Standard (CNS) A4 (210 X 297 mm)