KR20210047770A - Hud system and method for controlling for the same - Google Patents

Abstract

Disclosed is a HUD system using LVDS transmission specifications. According to the present invention, the HUD system comprises: an LVDS reverse serialization unit which receives the HUD image data and the frame data including a control signal from an external processor which generates HUD image data and control signal by the LVDS transmission specification method; a video decoder unit which identifies the HUD image data and the control signal included in the frame data received from the LVDS reverse serialization unit by the LVDS transmission specification method; and a HUD LCD which receives the HUD image data from the video decoder unit by the LVDS transmission specification method and displays the HUD image data. The control signal corresponds to the RGB information of the pixels in the front porch area and the back porch area. The present invention aims to provide the HUD system and the control method thereof, which are able to simplify the complex HUD system and reduce the costs.

Description

HUD system and its control method {HUD SYSTEM AND METHOD FOR CONTROLLING FOR THE SAME}

The present invention relates to a HUD system and a control method therefor, and more particularly, to an RGB interface type HUD system to which the LVDS transmission standard is applied, and a control method therefor.

When HUD image data and control signals are received in the vehicle's headup display (HUD) system, data of the RGB interface method (including HUD image data and control signals) can be received in the LVDS transmission standard method.

The LCD (referred to as HUD LCD) used in the HUD system is connected to an external processor through an LCD driver IC (LDI), and the LDI performs the function of transmitting data sent from the external processor to the HUD LCD. The external processor transmits HUD image data and control signals to the LDI so that the desired screen is displayed on the HUD LCD.

In the case of the RGB interface method, an external processor creates a frame buffer and periodically transfers the data stored therein to the LDI. Therefore, even when the image displayed on the LCD screen does not change, the system load increases because the same data must be periodically transmitted to the LDI. Due to this characteristic, the RGB interface method is mainly used when outputting a rapidly changing screen such as moving picture data to an LCD.

Meanwhile, for data communication between the HUD LCD of the HUD system and an external processor, a low volatage differential signaling (LVDS) transmission standard method that enables high-speed data communication using a low-cost copper twisted pair can be applied.

Due to the high performance and high integration of the processor, when the HUD image data is generated directly from the AVN (audio video network) device and transmitted in the LVDS transmission standard method, the processor for only the HUD device may not be used, but even in this case, the LCD There is a problem in that it is necessary to use a microcontroller unit (MCU) and a controller area network (CAN) transceiver for HUD system control such as illumination control or motor control.

An object of the present invention for solving the above problems is to receive HUD image data and control signals of an RGB interface method from an AVN device in an LVDS transmission standard method without an MCU and a CAN transceiver, and display HUD image data and control the operation. It is to provide a HUD system and a control method for it.

In order to achieve the above object, the HUD system according to an embodiment of the present invention receives frame data including the HUD image data and control signals from an external processor that generates HUD image data and control signals in an LVDS transmission standard method. Deserialization unit, a video decoder unit for checking HUD image data and control signals included in the frame data received from the LVDS deserializer in the LVDS transmission standard method, and the HUD image data from the video decoder unit to the transmission standard It includes a HUD LCD that is received and displayed in an LVDS transmission standard method, and the control signal corresponds to RGB information of pixels in a front porch area and a back porch area.

The HUD system according to an embodiment of the present invention further includes a BLU unit controlled based on BLU control information included in the control signal checked by the video decoder unit.

The HUD system according to an embodiment of the present invention further includes a motor unit controlled based on motor control information included in the control signal checked by the video decoder unit.

The video decoder unit analyzes the identified HUD image data on a pixel-by-pixel basis to derive and store RGB information of the pixel, or derives RGB information of the pixel and converts and stores it into YUV information.

The front porch area and the back porch area are determined by VSYNC, HSYNC, and an enable signal.

The video decoder unit includes a lookup table (LUT) indicating a correspondence relationship between RGB information included in at least one pixel in the front porch region and the back porch region and the control signal.

RGB information included in at least one pixel in the front porch area and the back porch area corresponds to information indicating at least one of start and end of the control signal transmission.

The video decoder unit checks whether an error has occurred in the received frame data based on RGB information for error checking included in at least one of the front porch area and the back porch area.

When the video decoder unit checks the frame data for errors, the HUD LCD maintains the previously received frame data.

When the occurrence of an error in the frame data exceeds a predetermined reference number, the video decoder notifies the external processor of the occurrence of an error in the frame data using an LVDS inverse channel.

The LUT is stored in an internal ROM of the video decoder, and the storage area of the internal ROM corresponds to an area for a control signal corresponding to RGB information of a pixel in the front porch area and RGB information of a pixel in the back porch area. It is managed so that the area for the control signal is distinguished.

The LUT is classified for each model of the HUD system in which the video decoder unit is mounted, and is stored in the internal ROM.

A method for controlling a HUD system according to an embodiment of the present invention includes determining a display display area, a front porch area, and a back porch area based on VSYNC, HSYNC, and an enable signal, the front porch area and the back porch area. Checking whether frame data is an error based on RGB information for error checking of frame data included in at least one of the pixels in the porch area, and if there is no error as a result of the error checking of the frame data, pixels in the front porch and back porch areas And checking a control signal included in at least one of the pixels, and controlling the HUD system based on the checked control signal.

Checking the control signal included in at least one of the pixels in the front porch and the back porch region is performed using a lookup table (LUT) including information on a control signal corresponding to the RGB information of the pixel. .

The HUD system control method according to an embodiment of the present invention further includes controlling the HUD display unit based on the control signal checked using the LUT (lookup table).

The HUD system control method according to an embodiment of the present invention includes RGB information indicating the start and end of transmission of the control signal among RGB information of a pixel included in at least one of the pixels in the front porch area and the back porch area. It further includes the step of confirming.

In the HUD system control method according to an embodiment of the present invention, if there is an error as a result of the error checking of the frame data, when the number of error occurrences of the frame data exceeds a predetermined reference number, the frame data is transmitted to an external processor using an LVDS reverse channel It further includes transmitting the error occurrence information.

The control signal includes at least one of information on brightness adjustment of a backlight unit (BLU) and motor control information.

According to the present invention, when the HUD system receives a control signal, it is possible to receive a control signal from an external processor that generates and transmits HUD image data and control signals without passing through the MCU and the CAN transceiver. Material cost can be reduced.

1 is a block diagram illustrating a conventional HUD system.
Fig. 2 is a diagram for explaining the RGB interface timing according to the prior art.
3 is a diagram for explaining a control signal of an RGB interface method according to the prior art.
4 is a block diagram illustrating a HUD system according to an embodiment of the present invention.
5 is a diagram illustrating a relationship between RGB information and control signals of a front porch region and a back porch region according to an embodiment of the present invention.
6 is a flowchart illustrating a HUD system control method according to an embodiment of the present invention.

In the present invention, various modifications may be made and various embodiments may be provided, and some embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, and the scope of the present invention should be understood to include all changes, modifications, equivalents or substitutes belonging to the technical idea of the present invention conceived from the embodiments. do.

Terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. The term and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it is understood that it may be directly connected or connected to the other component, but other components may exist in the middle. It should be. It should be understood that there is no other component in the middle only when it is mentioned that a certain component is "directly connected" or "directly connected" to another component.

The terms used in the present application are only used to describe the examples presented, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "include" or "have" are intended to designate the existence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and other features, numbers, and steps. It is to be understood that it does not preclude the possibility of the presence or addition of, operations, components, parts, or combinations thereof.

All terms used in this specification, including technical or scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs, and are ideal or excessively reduced formal It should not be interpreted as a meaning, and when defining the meaning of a term in this specification, the term should be interpreted as defined.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, in order to facilitate an overall understanding, the same reference numerals are used for the same elements in the drawings, and duplicate descriptions for the same elements are omitted.

1 is a block diagram of a HUD system according to the prior art.

The LVDS deserialization unit of the HUD system 100 according to the prior art receives the HUD image data of the RGB interface method generated by the CPU 110 of the AVN device in the LVDS transmission standard method, and also applies the LVDS transmission standard method to the video decoder unit. Send to (130). The video decoder unit 130 decodes the received HUD image data and transmits the decoded image to the HUD LCD 140 by applying the LVDS transmission standard method. box). The video decoder unit 130 transmits error information related to an error in the decoded HUD image data to the MCU 160.

Meanwhile, the HUD system control signal for controlling the brightness of the backlight unit (BLU) of the HUD LCD 140 or the control of the image projection angle in the HUD system (for example, a step motor) is used to perform CAN communication. For example, it is transmitted to a related module (for example, the BLU 170 or the motor 180) through the CAN transceiver unit 150 and the MCU 160.

The video decoder unit 130 analyzes the HUD image data of the RGB interface method so that the decoded HUD image data is displayed on the display area of the HUD LCD 140 (220 in FIG. 2 ). Next, an RGB interface method will be described with reference to FIG. 2.

In the RGB interface method, a command for initializing LDI is transmitted through a parallel or serial method of the CPU interface, and image data is transmitted through the RGB interface method. In the RGB interface method, control signals such as VSYNC, HSYNC, ENABLE, DOTCLK, etc. are used to display a display area such as the display area 220, a back porch area 210, and a front porch area 230. Set the same non-display area.

The VSYNC signal is a vertical synchronization signal that signals the start of one frame data. In one frame data, an HSYNC signal, which is a horizontal synchronization signal, and an ENABLE (also referred to as DataEnable) signal indicating the existence of actual image data, exist as many as the number of lines of the actual display area 220. In general, a back porch area 210 and a front porch area 230 are set before and after a section in which VSYNC is enabled.

One HSYNC timing corresponds to several clocks (DOTCLK in FIG. 2), and the ENABLE section is set by counting the number of clocks, and image data is displayed on the display area 220 when the ENABLE section is activated. . The number of gates that determine the data of one frame is usually set using the NL0 instruction, the back porch section uses the BP instruction, the front porch section uses the FP instruction, and is generally set to 2H time. do. When the FP and BP are set, they are set to coincide with the porch section of the timing diagram of the RGB interface supplied from the outside (for example, the timing diagram of FIG.

Meanwhile, as shown in FIG. 3, HSYNC is used as the reference for VFP, VBP, and VSW of VSYNC, and the porch region is determined based on DOTCLK for HFP, HBP, and HSW of HSYNC. The frequency of one frame is determined by synchronizing VSYNC, HSYNC and DOTCLK, and if these settings are not correct, flicker or flicker occurs on the LCD screen. Table 1 is a table for explaining control signals in the display display area, the front porch area, and the back porch area in the RGB interface method shown in FIG. 3.

Timing signal Explanation VSYNC Select Active High, LOW as Vertical Sync Polarity setting HSYNC Select Active High, LOW as Horizontal Sync Polarity setting ENABLE Select High or LOW as Enable Polarity setting VBP Vertical Back Porch VFP Vertical Front Porch VSW Vertical Sync Width HBP Horizontal Back Porch HFP Horizontal Front Porch HSW Horizontal Sync Width DCLK Dot Clock

It has been described above that in the HUD system to which the above RGB interface method and LVDS transmission standard method are applied, the CAN transceiver unit 150 and the MCU 160 for control signals are required. Next, embodiments of the present invention in which the video decoder unit controls the HUD system by simultaneously receiving HUD image data and control signals from the video decoder unit without using the CAN transceiver unit 150 and the MCU 160 will be described.

4 is a block diagram illustrating a HUD system according to an embodiment of the present invention.

The HUD system 400 according to an embodiment of the present invention shown in FIG. 4 is an LVDS deserializer for receiving RGB interface HUD image data and control signals from the CPU 110 of the AVN device in the LVDS transmission standard method. A video decoder unit that receives HUD image data and control signals from (120), LVDS deserializer (120) in the LVDS transmission standard method, decodes images, checks image errors, and derives control signals and transmits them to related modules ( 410), and a HUD LCD 140 that displays the decoded image transmitted from the video decoder unit 410.

In addition, the HUD system 400 according to an embodiment of the present invention receives an LCD backlight control signal from the video decoder unit 410 and performs LCD backlight control. It further includes a motor unit 180 for adjusting the image projection angle by receiving a motor control signal for adjusting the projection angle of the image 400.

The HUD system 400 according to the embodiment of the present invention shown in FIG. 4 includes HUD image data (displayed in the display area) and control signals (front porch) transmitted by the CPU 110 of the AVN device in an RGB interface. The video decoder unit 410, which received the RGB information of the pixels in the region and the back porch region, is identified as included in the RGB information for convenience of description) using the LVDS transmission standard method, as well as decoding the HUD image data, as well as the conventional CAN transceiver and MCU. The point is that the control signals included in the RGB information of the pixels in the front porch area and the back porch area are also identified and transmitted to the related module. Next, each component of the HUD system 400 according to an embodiment of the present invention will be described in detail.

The LVDS deserialization unit 120 of the HUD system 400 according to an embodiment of the present invention includes HUD image data (displayed on the LCD display area) and control signals transmitted by the CPU 110 of the AVN device in an RGB interface. (Included in the front porch area and the back porch area) is received in the LVDS transmission standard method and transmitted to the video decoder unit 410.

HUD image data and control signals generated by the CPU 110 of the AVN device and transmitted to the HUD system 400 are identified and processed in units of frame data. For example, in the case of a video image having a frame rate of 60 Hz, one data frame corresponds to 16.6 ms and a control signal is identified and processed every 16.6 ms.

HUD image data and control signals in the frame data are allocated to the back porch area, the display display area, and the front porch area as shown in FIG. 5. The back porch area, the display display area, and the front porch area refer to pixels in the corresponding area, and are synchronized with HSYNC and VSYNC according to the prior art shown in FIGS. 2 and 3, and the ENABLE signal is also considered and determined.

The video decoder unit 410 of the HUD system 400 according to an embodiment of the present invention separates the HUD image data and the control signal from the frame data received from the LVDS deserializer 120 and checks each. HUD image data and control signals are expressed and transmitted in an RGB method. For example, RGB information for each pixel of the back porch area 210 (8 bits allocated to R, 8 bits allocated to G, as shown in FIG. 5) 8 bits allocated to B) can be used as a control signal.

Control signals corresponding to RGB information of pixels in the back porch area (210 of FIG. 5) and the front porch area (230 of FIG. 5) may be represented by a lookup table (LUT) as shown in FIG. 5. In other words, as shown in FIG. 5, from pixel 6 (indicated by p6) to pixel 20 (indicated by p20) of the front porch area 210, the rotation direction and rotational speed of the motor unit 180 (assuming a step motor) It may be allocated to the LUT to indicate the mapping between the RGB information of the pixel indicating the control signal and the control signal, and the BLU 170 from pixel 6 (indicated by p6) to the pixel 100 (indicated by p100) of the back porch area 230 It may be allocated to the LUT to indicate mapping between RGB information of a pixel indicating a pulse width modulation (PWM) width for brightness control and a control signal.

The types of control signals corresponding to the RGB information of the pixels in the back porch area 210 and the front porch area 230, and the pixel section and RGB information corresponding to each control signal are not limited to the above-described examples, and may be allocated in various ways. I can. The LUT, which is mapping information between the RGB information and the control signal, can be stored in a register in the CPU of the AVN device or in a separate memory, or in a storage space inside the HUD system, but is not limited thereto and can be stored in another storage space. have. For example, the LUT may be stored in an internal ROM area of the video decoder 410.

The storage area of the internal ROM may be managed such that an area for a control signal corresponding to RGB information of a pixel in the front porch area and an area for a control signal corresponding to RGB information of a pixel in the back porch area are distinguished. For example, the storage area of the internal ROM may be divided into a control part of the BLU 170 and a control part of the motor 180, and when the control signal of the front porch area is identified, the motor control table of the internal ROM is stored. The RGB information of the pixel corresponding to the control signal is compared with the type of the control signal, and when the control signal of the back porch area is identified, the RGB information and control of the pixel corresponding to the control signal are stored in the area where the BLU control table of the internal ROM is stored. You can compare the types of signals.

The LUT of the video decoder unit 410 may be stored in different values according to the model of the HUD system 400, and a HUD system in which the corresponding video decoder unit 410 is mounted in the internal ROM area of the video decoder unit 410 It may contain a storage area to identify the model name. At this time, the video decoder unit 410 may transmit the model name of the HUD system 400 on which it is mounted through the LVDS back channel when the HUD system 400 is initially booted, and through this, the head that transmits the video image You can make sure it's the right combination with the unit.

The video decoder unit 410 checks the RGB information of the pixels allocated to the back porch area 210 and/or the front porch area 230, checks the corresponding control signal based on the LUT, and transmits it to other modules, etc. It has an output means. The output means includes communication control ports such as GPIO, PWM, MIPI, SPI, I2C, and the like.

The HUD LCD 140 of the HUD system 400 according to an embodiment of the present invention receives HUD image data from the video decoder unit 410 and displays it on the display area of the HUD LCD 140. The BLU 170 of the HUD system 400 according to an embodiment of the present invention receives a control signal related to brightness control directly from the video decoder unit 410 and adjusts brightness based thereon. The video decoder unit 410 and the BLU 170 transmit and receive control signals using communication control ports such as GPIO, PWM, MIPI, SPI, and I2C.

The motor unit 180 of the HUD system 400 according to an embodiment of the present invention receives a control signal related to the angle adjustment of the HUD system 400 from the video decoder unit 410, and the HUD system 400 is based thereon. Adjust the angle of the HUD LCD 140. The video decoder unit 410 and the motor unit 180 transmit and receive control signals using communication control ports such as GPIO, PWM, MIPI, SPI, and I2C.

5 illustrates a relationship between RGB information and control signals of a front porch region and a back porch region in the HUD system according to an embodiment of the present invention.

In order to more clearly check the control signals allocated to the back porch region 210 and the front porch 230, control signals start to the pixels allocated to the back porch region 210 and the front porch 230 RGB information and control Signal end RGB information may be allocated. The RGB information of the pixel (control signal p) between the pixel to which the control signal start RGB information is assigned (start p in Fig. 5) and the pixel to which the control signal end RGB information is assigned (end p in Fig. 5) corresponds to a specific control signal. It can be implemented as possible.

In addition, different control signals can be clearly distinguished by using RGB information in a pixel indicating the type of control signal. That is, when the corresponding RGB information is identified by setting the control signal start RGB information indicating the allocation of a specific control signal, it is possible to check the specific control signal from the RGB information of the next pixel (e.g., the control signal start RGB information is In the case of RGB pattern 1, it can be seen that the pixels related to the motor angle and direction control follow, and if the control signal start RGB information is the RGB pattern 2, it can be seen that the pixels related to the BLU brightness follow).

For example, R255/G255/B255 (black) pixels in the back porch area <notice the start of control signal 1> + R/G/B <color pixels promised to LUT> + R255/G255/B255 (black) pixels <for control Signal 1 end signal>, R000/G000/B255 (blue) pixel <control signal 2 start signal> + R/G/B <LUT color pixel> + R000/G000/B255 (blue) pixel It can be set as <Notification of the end of control signal 2>. Alternatively, you can set R255/G255/B255 (black) pixels in the back porch area <notify the start of control signal 1> + R000/G000/B005 pixels <notify that the next 5 pixels are control pixels> (control Signal termination RGB is not set separately).

In addition, two or more pixels to which the control signal start RGB information is allocated and/or the pixel to which the control signal end RGB information is allocated may be consecutively allocated (e.g., a control signal start pixel, a control signal start pixel, and a control signal pixel). , Control signal end pixel, control signal end pixel, etc.).

On the other hand, it is possible to check whether or not there is an error in the data frame using RGB information of the pixels of the back porch area and/or the front porch area. That is, a specific RGB pattern is allocated to a specific pixel(s) in the back porch area and/or the front porch area, and transmitted from an external processor to the HUD system, and when the video decoder unit 410 of the HUD system decodes the data frame, the corresponding pixel(s) ) If a specific RGB pattern allocated for error checking is identified as it is, it is determined that there is no data frame error, and if it is identified that the RGB pattern is not the same, the data frame is not transferred to the HUD LCD 140 and is not transmitted to the HUD LCD. 140) maintains the previously transmitted data frame.

For example, as shown in FIG. 5, 5 consecutive pixels for error checking in the back porch area 210 from the first pixel p1 to the fifth pixel p5 of the back porch area 210 (e.g., Pixel 1 <R255/B000/G000>, Pixel 2 <R255/B000/G000>, Pixel 3 <R200/B000/G000>, Pixel 4 <R255/B000/G000>, Pixel 5 <R000/B000/G000>) Is assigned and preset to transmit/receive, Pixel 1 <R255/B000/G000>, Pixel 2 <R255/B000/G000>, Pixel 3 <R200/B000/G000>, Pixel 4 <R255/B000/G000>, When the pixel 5<R000/B000/G000> is received by the video decoder unit 410, it is determined that no error or damage has occurred in the data frame, but if any one of the pixels is received with different information, an error or damage has occurred. Judge and keep the previous data frame.

In addition, when such a data frame error is repeated a certain number of times or more, error information indicating the occurrence of such an error may be transmitted to an external processor. For example, if an error occurs 5 times in a row or within a predetermined number of data frame transmissions (eg, 10 transmissions), the video decoder unit 410 may transmit the error information to an external process using the LVDS reverse channel.

Next, a method of controlling the HUD system according to the present invention will be described.

6 is a flowchart illustrating a HUD system control method according to an embodiment of the present invention.

A method of controlling a HUD system according to an embodiment of the present invention shown in FIG. 6 relates to a method of controlling a HUD system according to the present invention shown in FIGS. 4 to 5.

First, the video decoder unit determines a display display area (also referred to as an active area), a front porch area, and a back porch area based on the VSYNC, HSYNC, and the enable signal (S610).

An error of frame data is checked based on RGB information of a pixel to which RGB information for checking frame data error set in advance is allocated among the front porch area and/or the back porch area (S620).

When an error of the frame data is confirmed (YES in S630), the video decoder unit checks the number of occurrences of the error (S680). If the number of error occurrences is less than the reference value (No in S680), the previous frame data is maintained (S695). Specifically, the HUD LCD 140 retains the previous frame data (S695). If the number of error occurrences is greater than the reference value (example of S680), the occurrence of frame data errors is reported to an external processor or the like using an LVDS reverse channel (S690).

When the video decoder unit checks the frame data error based on the RGB information of the pixel to which the RGB information is allocated (S620), if the error is not confirmed (No in S630), the RGB information of the pixels in the front porch and/or back porch area is Confirm (S640).

The video decoder unit checks the control signal section from the identified pixel RGB information (S650). Based on the identified control signal section, the pixel related to the start of the control signal and the pixel related to the end of the control signal are checked, and the type of the control signal and the specific information of the control signal are checked using the aforementioned LUT (S660). Alternatively, the pixels related to the start and end of the control signal may be set not to be used. In that case, the control signal can be checked using the LUT from RGB information of each pixel in the front porch and/or the back porch.

The video decoder unit 410 transmits the identified control signal to a related module, and the module controls the HUD system 400 based on the received control signal (S670) (that is, a module related to the control signal is a corresponding control signal. And then control the module based on it).

Meanwhile, each of the above-described components has been described as a separate device, but this is only an exemplary description for convenience of description and enhancement of understanding, and may be implemented in various forms within the scope of the technical idea of the present invention. Of course. For example, the deserializer 120 and the video decoder 410 may be implemented by being integrated into one module, or may be implemented by dividing into two or more devices.

The methods according to the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like alone or in combination. The program instructions recorded in the computer-readable medium may be specially designed and configured for the present invention, or may be known and usable to those skilled in computer software.

Examples of computer-readable media include hardware devices specially configured to store and execute program instructions, such as rom, ram, flash memory, and the like. Examples of program instructions include machine language codes such as those produced by a compiler, as well as high-level language codes that can be executed by a computer using an interpreter or the like. The above-described hardware device may be configured to operate as at least one software module to perform the operation of the present invention, and vice versa.

The configuration of the present invention has been described in detail above through a preferred embodiment of the present invention. However, the above-described embodiments are for illustrative purposes only, and do not limit the scope of the present invention. Those of ordinary skill in the art of the present invention will be able to make various modifications and changes within the scope of the technical idea of the present invention from the teachings and suggestions of the present specification. Accordingly, the scope of protection of the present invention should be determined by the description of the following claims.

Claims (18)

An LVDS deserializer for receiving frame data including the HUD image data and control signals from an external processor that generates HUD image data and control signals in an LVDS transmission standard method;
A video decoder unit for checking HUD image data and a control signal included in the frame data received from the LVDS deserializer in the LVDS transmission standard method; And
And a HUD LCD for receiving and displaying the HUD image data from the video decoder unit in the transmission standard LVDS transmission standard method,
The control signal is a HUD system corresponding to RGB information of pixels in a front porch area and a back porch area. The method of claim 1,
The HUD system further comprising a BLU controlled based on BLU control information included in the control signal checked by the video decoder unit. The method of claim 1,
The HUD system further comprising a motor unit controlled based on motor control information included in the control signal checked by the video decoder unit. The method of claim 1,
The video decoder unit analyzes the identified HUD image data on a pixel-by-pixel basis to derive and store RGB information of the pixel, or derives RGB information of the pixel and converts and stores it into YUV information. The method of claim 4,
The front porch area and the back porch area are determined by VSYNC, HSYNC, and an enable signal. The method of claim 5,
The HUD system, wherein the video decoder unit includes a lookup table (LUT) indicating a correspondence relationship between RGB information included in at least one pixel in the front porch region and the back porch region and the control signal. The method of claim 5,
RGB information included in at least one pixel in the front porch area and the back porch area corresponds to information indicating at least one of start and end of the control signal transmission. The method of claim 5,
The HUD system, wherein the video decoder unit checks whether an error has occurred in the received frame data based on RGB information for error checking included in at least one of the front porch area and the back porch area. The method of claim 8,
The HUD LCD, when the video decoder unit confirms an error in the frame data, maintains the previously received frame data. The method of claim 8,
The HUD system, wherein the video decoder unit notifies the external processor of the occurrence of an error in the frame data by using an LVDS inverse channel when the occurrence of an error in the frame data exceeds a predetermined reference number. The method of claim 6,
The LUT is stored in an internal ROM of the video decoder, and the storage area of the internal ROM corresponds to an area for a control signal corresponding to RGB information of a pixel in the front porch area and RGB information of a pixel in the back porch area. HUD system that is managed so that the area for the control signal is distinguished. The method of claim 11,
The LUT is classified for each model of the HUD system in which the video decoder unit is mounted and is stored in the internal ROM. Determining a display display area, a front porch area, and a back porch area based on VSYNC, HSYNC, and an enable signal;
Checking whether the frame data has an error based on RGB information for checking frame data errors included in at least one of the pixels in the front porch area and the back porch area;
Checking a control signal included in at least one of the pixels in the front porch and the back porch region if there is no error as a result of the error checking of the frame data; And
And controlling the HUD system based on the identified control signal. The method of claim 13,
Checking the control signal included in at least one pixel among the pixels in the front porch and the back porch region is performed using a lookup table (LUT) including information on a control signal corresponding to the RGB information of the pixel. , HUD system control method. The method of claim 14,
The HUD system control method further comprising controlling the HUD LCD based on the control signal checked using the LUT (lookup table). The method of claim 14,
The HUD system control method further comprising the step of checking RGB information indicating the start and end of transmission of the control signal among RGB information of a pixel included in at least one of the pixels in the front porch area and the back porch area. The method of claim 13,
If there is an error as a result of the error check of the frame data,
And transmitting frame data error occurrence information to an external processor using an LVDS reverse channel when the number of error occurrences of the frame data exceeds a predetermined reference number. The method of claim 13,
The control signal includes at least one of information on brightness adjustment of a backlight unit (BLU) and motor control information.

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