CN101178877A - Image display control device - Google Patents

Abstract

The present invention provides an image display control device, etc., which can achieve rapidity (real-time performance), low power consumption, and suppress the increase in circuit scale. High-precision image correction that does not exist in the prior art for image quality degradation caused by light reduction. The correction coefficients for illumination brightness after light reduction and image correction are calculated by the real-time calculation of the shared calculator (218). The shared arithmetic unit (218) is controlled by the microcode stored in the code table (216). During image correction, the enhancement of chromaticity correction is implemented, the chromaticity drop caused by light reduction is suppressed, and flickering is prevented through serial recursive IIR filter processing. In addition, even for images with low average luminance and high chroma, dimming of illumination can be limited and chroma reduction can be suppressed.

Description

Image display control device

technical field

The present invention relates to an image display control device and the like. In particular, it relates to an image display control device (image display control LSI) etc. which adaptively dims the brightness of display illumination according to a displayed image and corrects an image signal to compensate for the degradation of image quality caused by the dimming.

Background technique

Patent Document 1 discloses a technique of reducing the amount of light emitted from a backlight for power saving and adjusting image data so that the transmittance of a liquid crystal display screen can be increased as much as possible.

Furthermore, Patent Document 2 describes an image correction device that uses a look-up table (LUT) to correct a luminance signal of a displayed image.

Patent Document 1: Japanese Patent Application Laid-Open No. 11-65531

Patent Document 2: Japanese Patent Laid-Open No. 2004-310671

In order to simultaneously perform image correction for preventing dimming of illumination (such as a backlight) and deterioration of image quality, it is necessary to quickly perform a huge calculation based on image data. There is also a method of simplifying calculation processing using a look-up table (LUT) that stores calculation results, but memory access takes time. Therefore, it cannot be used when speed is required. For example, when reproducing a streaming video based on One-Seg Broadcasting (digital broadcasting for mobile phone terminals) on a mobile phone terminal, real-time performance is required, and it is not suitable to use a LUT method in this case.

When predetermined calculations are performed in parallel by a plurality of dedicated hardware, rapidity (real-time performance) can be ensured, but the occupied area of the circuit increases and the power consumption of the circuit also increases.

In addition, in the above-mentioned Patent Document 1, although only the correction of brightness is considered in the image correction for compensating for the degradation of image quality caused by the dimming of the illumination, the chromaticity of the image is damaged due to the dimming of the illumination. (Vividness of color), image quality is greatly degraded, so image correction that considers not only brightness but also chroma is required.

In addition, if control is performed to adaptively determine the dimming amount of the illumination in accordance with the brightness of the displayed image, when the brightness of the displayed image changes rapidly, the illumination brightness may change rapidly accordingly, causing flickering, resulting in degradation of the image quality of the displayed image. . In particular, when streaming video is reproduced, there is a possibility that flicker (visual flicker) may occur because the brightness of the image often changes momentarily. Therefore, it is necessary to find a way to suppress the flicker caused by scene transitions.

Contents of the invention

The present invention was made in view of the above problems, and an object of the present invention is to provide an image display control device and the like. According to the present invention, rapidity (real-time performance), low power consumption, and increase in circuit scale can be suppressed, and at the same time, adaptive dimming of lighting can be realized and used to compensate for the degradation of image quality caused by dimming High-precision image correction that is not available in the prior art.

The image display control device of the present invention is used to perform adaptive dimming of the illumination for image display according to the displayed image, and correct the image signal to compensate for the degradation of image quality caused by the dimming of the above-mentioned illumination. The above-mentioned image display control The device includes: a statistical information obtaining unit for obtaining the statistical information of the above-mentioned image signal; a shared calculator for obtaining the illumination brightness after dimming by using the statistical value information of the above-mentioned image signal provided by the above-mentioned statistical information obtaining unit, and simultaneously , generating correction coefficients for the correction of the above-mentioned image signal; the code storage unit stores a plurality of codes for specifying the operation steps of the above-mentioned common arithmetic unit; the sequence instruction unit controls the output order of the above-mentioned codes from the above-mentioned code storage unit; and a decoder that decodes the code output from the code storage unit, and generates at least one of an instruction and data to be supplied to the shared arithmetic unit.

Adaptive dimming processing of lighting and image correction processing are realized by real-time calculations by a common computing unit (common computing unit). Through this calculation, the correction coefficient for image correction and the illumination luminance after dimming are calculated in real time, and image correction using the calculated correction coefficient is performed. The operation of the common arithmetic unit is controlled by the microcode of the coded signal processing steps. By using a shared computing unit, real-time computing can be realized without setting up the same hardware in parallel, and fast dimming control and image correction can be realized with the smallest circuit and the smallest power consumption.

In addition, according to another aspect of the image display control device of the present invention, the codes are sequentially output from the code storage unit in the order indicated by the order designation unit, and the command or the command generated as a decoding result of the decoder is outputted sequentially. The data is provided to the above-mentioned shared computing unit, and the above-mentioned shared computing unit using the above-mentioned instruction or the above-mentioned data determines the illumination brightness after the light reduction and generates a correction coefficient for the correction of the above-mentioned image signal, and outputs the result obtained by using the above-mentioned correction coefficient. The corrected image signal and a signal representing the reduced illumination brightness.

In the present invention, a procedure for generating instructions (operands) and data (multiplication coefficients, etc.) to be supplied to the shared arithmetic unit is clarified. The code table stored in the microcode is instructed by the sequence instruction unit, and the codes are output sequentially, and the instructions and data are generated by the decoder, and provided to the common arithmetic unit. According to the operation of the common arithmetic unit, the dimmed lighting brightness and correction coefficients and output them in parallel. With the simplest structure, the reduced illumination luminance and correction coefficient can be quickly and effectively generated.

In addition, according to another aspect of the image display control device of the present invention, the shared calculator includes a first multiplexer and a second multiplexer, an arithmetic logic operation unit, and a distribution unit for distributing operation results of the arithmetic logic operation unit. The decoder supplies coefficients from the decoder to the first multiplexer and the second multiplexer, operation commands to the arithmetic logic operation unit, and distribution information to the distributor.

In the present invention, the following technical contents are clarified: an example of the specific configuration of the shared arithmetic unit is clarified, and what kind of command or data is given to each constituent element is clarified. That is, in the present embodiment, a common arithmetic unit is constituted by a plurality of multiplexers, arithmetic logic unit (ALU), and distributor. Coefficients for operation are supplied to the multiplexer, instructions (operation codes) are supplied to the ALU, and allocation destination information is supplied to the allocator.

In addition, according to other aspects of the image display control device of the present invention, the above-mentioned shared arithmetic unit further includes: a plurality of output destination registers; and a feedback path for feeding back at least part of the signals stored in the above-mentioned plurality of output destination registers to the input side.

In the present invention, it is clarified that the shared arithmetic unit has a feedback path for feeding back the calculation result to the input side. Thus, the following processing can be realized: For example, firstly, the illumination brightness after dimming is obtained through the first calculation processing, and the calculation result is fed back to the input side, and the correction coefficient of the image is obtained according to the obtained illumination brightness . In addition, since the shared arithmetic unit has a feedback path, recursive (IIR) filtering processing can be performed.

Furthermore, according to another aspect of the image display control device of the present invention, the statistical information acquiring unit acquires statistical values of luminance and chromaticity of the image signal, and performs enhancement in correction of the image signal using the correction coefficient. Correction of brightness corresponding to dimming of the above-mentioned lighting, and correction of enhancing chromaticity corresponding to dimming of the above-mentioned lighting.

When image correction with light reduction is performed, if only the brightness is increased (stretched), the image quality may deteriorate due to the decrease in chromaticity. That is, it is unavoidable that the entire color gamut is narrowed due to dimming of the illumination, and the chromaticity is also reduced. Therefore, according to the present invention, an image correction (for example, intensified chromaticity correction is performed so that the average chromaticity before and after dimming as uniform as possible), thereby preventing degradation of the image quality of vividly colored images.

Furthermore, according to another aspect of the image display control device of the present invention, the statistical information acquiring unit acquires statistical values of luminance and chromaticity of the image signal, and when obtaining the dimmed illumination luminance, based on the luminance According to the relationship between the statistical value of the above-mentioned chromaticity and the statistical value of the above-mentioned chromaticity, it is judged which of the above-mentioned dimming of the above-mentioned lighting and the prevention of the above-mentioned chromaticity reduction are given priority. When the reduction of the chromaticity is prioritized, the dimming of the lighting Dimming control is performed on a limited basis.

When performing adaptive dimming on the lighting (backlight, etc.) corresponding to the statistical information of the image, if the dimming amount is determined only on the basis of brightness, there will be excessive dimming, and the vividness of red (R) and blue (B) will be affected. damage situation. That is, it is a principle that the dimming amount of the illumination is large because the darkened image is less affected by the dimming. However, even for a dark image, for example, when there is a large bright rose flower in the center of the screen, it is appropriate to limit the light reduction amount in order to suppress the decrease in chromaticity of the rose flower. However, since red (R) and blue (B) have low contribution rates to luminance (Y), judging that it is a dark image based only on luminance (Y) will excessively reduce the illumination. Therefore, in order to prevent such excessive dimming, dimming is determined based on not only brightness (Y) but also chromaticity (redness (Cr), blueness (Cb)) as a reference, and when brightness and chromaticity When the predetermined relationship is satisfied, the dimming amount is limited with priority given to chromaticity. According to this, in an image with high chromaticity, light reduction can be suppressed, and a decrease in chromaticity of a displayed image can be suppressed.

Furthermore, according to another aspect of the image display control device of the present invention, the image display control device performs first recursive (IIR) filter processing on the correction of dimming the illumination and the correction of the image signal using the correction coefficient, respectively. and second recursive type filter processing, the time constant of the first recursive type (IIR) filter processing for correction of dimming the illumination is set to be longer than that of the second recursive type (IIR) filter processing for correction of the image signal The time constant of the recursive (IIR) filtering process.

When performing adaptive dimming of illumination brightness and image correction in each frame of a moving image, visual flicker (flicker) may occur due to sharp changes in illumination brightness and image correction amount with scene transitions. Therefore, filter processing appropriate to each characteristic is performed on a frame-by-frame basis for both the required illumination correction and image correction. Because the change of illumination brightness is the change of white and black, it is easy to recognize visually, so filter processing with a long time constant is performed. On the other hand, because the change of image correction amount is the change of halftone, it is difficult to cause Note that emphasis is placed on adaptability to scene transitions of moving images, and filtering processing with a short time constant is performed. According to this, it is possible to realize the image correction accompanying the scene transition of the dynamic image, and at the same time, it is possible to effectively suppress the flicker accompanying the adaptive correction of the lighting.

In addition, according to another aspect of the image display control device of the present invention, the image display control device performs the illumination including the first recursive filtering process based on at least one of the statistical value of the luminance and the statistical value of the chromaticity. Dimming control, obtaining the illumination brightness after the dimming, and performing correction of the image signal including the second recursive filtering process based on the obtained illumination brightness.

Furthermore, if the first recursive filtering process and the second recursive filtering process are independently performed, the balance between illumination correction and image correction may be disrupted and image quality may be degraded. Therefore, the first recursive filtering process is performed on the required illumination brightness in units of frames, the image correction amount is obtained from the result, and the second recursive filtering process (serial processing) is performed on the image correction amount. Since the amount of image correction corresponding to the amount of light reduction is calculated after the amount of light reduction of the illumination luminance is calculated, the balance between the first and second recursive filter processing can usually be ensured.

Furthermore, according to another aspect of the image display control device of the present invention, the shared computing unit includes a feedback path for feeding back at least part of the computing results to the input side.

In the present invention, it is clarified that the first and second recursive filter processing can be performed by providing a feedback path in the shared arithmetic unit.

Furthermore, according to another aspect of the image display control device of the present invention, the code stored in the code storage unit is a microcode obtained by converting a description of an algorithm based on a programming language for displaying images based on Adaptive dimming is performed on the above-mentioned lighting for image display, and the image signal is corrected to compensate for the degradation of image quality caused by the dimming of the above-mentioned lighting.

For example, by collectively converting an algorithm written in a high-level programming language, generating microcode, and writing it into ROM (reading dedicated memory), a code table can be created efficiently. By changing the algorithm (microcode), it is relatively easy to change the calculation content of the shared arithmetic unit. Therefore, it is possible to flexibly respond to design changes.

Furthermore, the drive device of the photovoltaic device of the present invention is equipped with an image display control device.

The image display control device (image display control LSI) of the present invention is installed in a drive device (driver) of an optoelectronic device (including a liquid crystal display device). The image display control device (image display control LSI) of the present invention has the following characteristics: real-time processing of moving images such as streaming images, excellent power saving, and miniaturization. Therefore, the added value of the driving device (driver) is increased.

In addition, the control device of the photoelectric device of the present invention is equipped with the image display control device of the present invention.

The image display control device (image display control LSI) of the present invention is installed in a control device (controller) of an optoelectronic device (including a liquid crystal display device). The image display control device (image display control LSI) of the present invention has the following characteristics: real-time processing of moving images such as streaming images, excellent power saving, and miniaturization. Therefore, the added value of the control device (controller) is increased.

In addition, the drive control device of the photoelectric device of the present invention is equipped with the image display control device of the present invention.

The image display control device (image display control LSI) of the present invention is incorporated in a drive control device (device integrating a driver and a controller) of an optoelectronic device (including a liquid crystal display device). The image display control device (image display control LSI) of the present invention has the following characteristics: real-time processing of moving images such as streaming images, excellent power saving, and miniaturization. Therefore, the added value of the drive control device (device integrating the driver and the controller) is increased.

Furthermore, the electronic equipment of the present invention is equipped with the image display control device of the present invention.

For example, by installing the image display control device (LSI) of the present invention in a portable terminal (including a mobile phone terminal, a PDA terminal, and a portable computer), it is possible to display a streaming image such as one-segment broadcasting with high image quality, and Can prolong battery life.

According to at least one embodiment of the present invention, for example, the following effects can be obtained:

(1) Real-time computing can be realized without setting the same kind of hardware in parallel by using the arithmetic unit controlled by the microprogram, and fast adaptive dimming control and adaptive image correction can be realized with the smallest circuit and the smallest power consumption .

(2) By enhancing (stretching) not only luminance but also chromaticity, reduction in chromaticity can be suppressed, and degradation of image quality due to dimming can be compensated more effectively.

(3) By determining the dimming amount in consideration of both brightness and chromaticity, it is possible to limit the dimming amount in an image with high chromaticity, and it is possible to effectively prevent a decrease in chromaticity caused by excessive dimming.

(4) In both dimming correction and image correction, recursive type (IIR) filter processing is performed, and at the same time, by setting the time constant of the filter processing for dimming correction long, it is possible to secure the accuracy of moving images Adaptability to scene transitions, and can effectively suppress the occurrence of flicker (visual flicker).

(5) By calculating the image correction amount adapted to the light reduction amount after calculating the dimming amount of the illumination brightness (using serial processing), it is generally possible to ensure the filter processing with the dimming control and the adjustment with the image correction. Light handling balance.

(6) The degradation of image quality can be suppressed to a minimum, and at the same time, power consumption can be greatly reduced by adaptive dimming of illumination brightness (a maximum reduction of 30% has been confirmed). Furthermore, since it can be realized with minimum hardware, space saving can be achieved.

(7) It is possible to realize high added value of a driving device (driver), a control device (controller), and a drive control device (a device integrating a driver and a controller) of a liquid crystal display device or the like.

(8) By installing the image display control device (LSI) of the present invention in a portable terminal (including a mobile phone terminal, a PDA terminal, and a portable computer), it is possible to display a streaming image such as one-segment broadcasting with high quality, And can increase the battery life.

(9) Rapidity (real-time), low power consumption, and suppression of increase in circuit scale can be achieved. At the same time, adaptive dimming of lighting and compensation for image quality degradation caused by dimming can be realized simultaneously. , High-precision image correction that is not available in the prior art.

Description of drawings

1(A) to 1(C) are used to perform adaptive dimming control and image correction corresponding to a displayed image, which are adopted in the image display control device (image display control LSI) of the present invention. illustrations;

Fig. 2 shows the reduction rate of the back light, the image correction amount (Gy) without dimming, the image correction amount (Gy') with dimming, and the enhanced part of the image correction amount with dimming (ΔGy ) with respect to the characteristic figure of the change of the average brightness (Yave) of 1 frame image;

Fig. 3 is a schematic diagram showing how the brightness reduction rate of the backlight changes according to the characteristic line of the enhanced part (ΔGy=Gy'～Gy) of the image correction amount of the dimming;

4(A) to 4(C) are diagrams for explaining chromaticity correction;

5(A) to 5(D) are diagrams for explaining the outline of the image display control device of the present invention and the contents of filtering processing;

6(A) to 6(D) are block diagrams for explaining the installation form of the image display device of the present invention;

7 is a block diagram showing the outline of the overall configuration of the image display control device (image display control LSI) of the present invention;

Fig. 8 is a schematic diagram of the content of the control signal provided by the host computer to the image display control device;

FIG. 9 is a block diagram showing a specific structure of the image display control device shown in FIG. 7;

Figure 10 is a schematic diagram illustrating the steps of making a code table; and

FIG. 11 is a circuit diagram showing a specific internal configuration of a histogram creation unit (statistical information acquisition unit) shown in FIG. 9 .

Detailed ways

Before describing the embodiments of the present invention, the adaptive dimming control corresponding to the displayed image and the image The content of the correction will be explained.

(Relationship between dimming control and image correction)

FIG. 1(A) to FIG. 1(C) show the contents of adaptive dimming control and image correction corresponding to a displayed image, which are adopted in the image display control device (image display control LSI) of the present invention. Figure for illustration.

As shown in FIG. 1(A), in the embodiment of the present invention, the adaptive image correction of the liquid crystal panel (LCD) 10 and the adaptive correction of the brightness of the illumination (LED: hereinafter referred to as backlight) 12 (automatic adapt to dimming). In FIG. 1(A), Gy' is the enhanced image correction amount when there is dimming. This Gy' is obtained by adding the image correction amount Gy without dimming to the enhancement part ΔGy of the image correction amount with dimming. In addition, Gs is the correction amount of the brightness of the backlight 12 according to the adaptive dimming.

FIG. 1(B) shows the image correction amount Gy when there is no dimming. That is, Gy is the image correction amount when the brightness of the backlight 12 is fixed. For example, correction is performed to increase the luminance of a portion with low luminance, and correction is performed to decrease the luminance of a portion with high luminance.

FIG. 1(C) shows the enhanced portion ΔGy of the image correction amount with dimming. Since a dark image is less affected by dimming of the backlight 12 than a bright image, in principle, the amount of dimming of the backlight 12 is increased for a dark image. However, since the brightness of the displayed image decreases with dimming, intensive image correction is required to compensate for the decrease in brightness. The intensified part of the image correction with dimming (Gs) is ΔGy.

In the present invention, as shown in FIG. 1(A), the dimming of the backlight 12 is actively performed in order to save power. Add the enhanced part (ΔGy) of the image correction amount (ΔGy) with the dimming (Gs) to the image correction amount (Gy) of the image, so as to determine the final image correction amount Gy.

(Adaptive dimming with respect to the amount of image correction)

Figure 2 shows the backlight reduction rate, the image correction amount without dimming (Gy), the image correction amount with dimming (Gy'), and the enhanced part (ΔGy) of the image correction amount with dimming relative to 1 frame A characteristic map of the change in the average brightness (Yave) of an image.

In Fig. 2, the characteristic line A represents the characteristic of the backlight brightness reduction ratio (%), the characteristic line B represents the characteristic of the image correction amount (Gy) without dimming, and the characteristic line C represents the image correction amount (Gy) with dimming. ') characteristics, and the characteristic line D represents the characteristics of the enhanced portion (ΔGy) of the image correction amount with dimming.

First, attention is paid to the characteristic line A showing the change in the backlight luminance reduction rate. Obviously, the lower the average brightness (Yave), the higher the backlight brightness reduction rate, and the higher the average brightness (Yave), the lower the backlight brightness reduction rate. This is because the higher the average brightness of the image, the greater the impact of backlight dimming, so as a result: for images with low average brightness, the power saving is given priority to achieve large dimming, while for images with high average brightness, priority is achieved Minimize light reduction to suppress image quality degradation.

Next, attention will be paid to the characteristic line B showing the change in the image correction amount Gy when there is no dimming. As shown in Figure 2, until the average brightness value Gammath1, the correction of almost quantitative brightness improvement is implemented. If the average brightness value increases, the amount of brightness improvement decreases. When the average brightness value is greater than the average brightness value Gammath2, the brightness is reduced. correction. That is, basically, correction is performed to increase the brightness when the average brightness is low, and correction to decrease the brightness is performed when the average brightness is too high.

Next, attention will be paid to the characteristic line C showing the change in the image correction amount Gy' when there is dimming. Obviously, the lower the average brightness, the larger the image correction amount, and the higher the average brightness, the smaller the image correction amount. This is because the image correction amount is determined on the basis of the characteristic line B, and based on this, in order to prevent image quality degradation on the low-brightness side where a large dimming ratio is set, the lower the brightness, the more the image correction is required. The correction amount is enhanced.

Next, attention will be paid to the characteristic line D showing the variation of the enhancement portion (ΔGy=Gy' to Gy) of the image correction amount according to the dimming. As described above, the enhancement portion ΔGy of the image correction amount with dimming increases on the low luminance side, and gradually decreases as the luminance value increases. However, the enhanced part of the image correction amount gradually increases from the vicinity of the average luminance value Gammath3. This is because, with the dimming of the backlight 12 , the higher the brightness of the image, the more concerned about the deterioration of its image quality. Therefore, in order to suppress the brightness reduction of the image with high average brightness, it is necessary to further strengthen the image correction.

(The relationship between the strength of power saving and ΔGy)

Fig. 3 is a schematic diagram showing how the characteristic line of the enhancement part (ΔGy=Gy'˜Gy) of the image correction amount of the dimming corresponds to how the luminance reduction rate of the backlight changes. In Fig. 3, characteristic line A represents the characteristic line at high power saving (backlight brightness reduction rate of 30%), characteristic line B represents the characteristic line at low power saving (backlight brightness reduction rate of 10%), and characteristic line C represents normal Characteristic line for power saving (20% reduction in backlight brightness).

As described above, any of the characteristic lines shows a tendency that the enhancement portion ΔGy of the image correction amount with dimming increases on the low luminance side and gradually decreases as the luminance value increases, however, it also shows that ΔGy tends to increase gradually in areas with high luminance values. In addition, as the power saving performance is enhanced and the luminance reduction rate of the backlight is increased, the enhancement portion ΔGy of the image correction amount corresponding to the dimming increases accordingly.

(Correlation enhancement of chromaticity)

Due to the dimming of the backlight, the overall chromaticity of the screen decreases. Therefore, chromaticity correction is performed to preserve the chromaticity before and after dimming. Basically, chromaticity correction is performed according to the following formula (1). In addition, although only the blueness (Cb=Y-B) is shown in the following formula, the redness (Cr=Y-R) is also the same.

Cb[cb]=Fc×Gc+Cb...(1)

In the above formula (1), cb is the chromaticity correction input chromatic aberration, Cb is the chromaticity correction output chromatic aberration, Gc is the chromaticity correction amount, and Fc is the chromaticity correction coefficient curve.

4(A) to 4(C) are diagrams for explaining chromaticity correction. FIG. 4(A) is a schematic diagram of the output color difference (Cb or Cr) relative to the input color difference (cb or cr). In FIG. 4(A), the difference between the characteristic line shown by the solid line and the straight line shown by the dotted line corresponds to the chromaticity correction amount Gc in the above formula (1). FIG. 4(B) is a schematic diagram of the characteristics of the correction coefficient (Fc) with respect to the input chroma (cb or cr). Wherein, in the above formula (1), it is shown that the chromaticity correction during dimming is not considered, but in fact, it is necessary to add the chromaticity correction amount Gc to the enhanced part ΔGc of the chromaticity correction along with the dimming. ΔGc can be obtained by solving the equation under the condition that the average chromaticity is equal before and after dimming.

Also, if the dimming amount is determined based only on brightness, the dimming may be excessive and the vividness of red (R) and blue (B) may be impaired. That is, it is a principle that the dimming amount of the illumination is large because the darkened image is less affected by the dimming. However, even for a dark image, for example, when there is a large bright rose flower in the center of the screen, it is appropriate to limit the light reduction amount in order to suppress the decrease in chromaticity of the rose flower. However, since red (R) and blue (B) have low contribution rates to luminance (Y), judging that it is a dark image based only on luminance (Y) will excessively reduce the illumination. Therefore, in order to prevent such excessive dimming, dimming is determined based on not only brightness (Y) but also chromaticity (redness (Cr), blueness (Cb)) as a reference, and when brightness and chromaticity When the predetermined relationship is satisfied, the dimming amount is limited with priority given to chromaticity. According to this, in an image with high chromaticity, light reduction can be suppressed, and a decrease in chromaticity of a displayed image can be suppressed.

FIG. 4(C) is a diagram for explaining the process of determining which of dimming and chromaticity is preferentially stored using a threshold determined by the relationship between the average luminance and the average chromaticity. As shown in Fig. 4(C), a threshold value determined by the relationship between the average value of brightness and the average value of color difference (=chromaticity) is set, and the threshold value is used as a limit to determine whether to perform dimming based on brightness or color difference. Do dimming.

In FIG. 4(C), the shaded area ZP2 is a dimming area based on chromaticity (cr, cb), and ZP1 is a dimming area based on brightness (Y). For example, when the average brightness value is "64", since the image is dark, the amount of dimming increases greatly if judged only by the brightness. However, when the average chromaticity is, for example, "96", since it is an image with high chromaticity, it is necessary to suppress the decrease in chromaticity due to dimming. Therefore, in this case, the amount of light reduction is determined based on chromaticity (the amount of light reduction is reduced compared to when using luminance as a standard). That is, by placing a predetermined limit based on chromaticity on the amount of dimming based on luminance, excessive dimming such as extremely lowering of chromaticity is suppressed.

(Filter processing to prevent flickering caused by scene change)

When performing adaptive dimming of illumination brightness and image correction in each frame of a moving image, visual flicker (flicker) may occur due to sharp changes in illumination brightness and image correction amount with scene transitions. Therefore, filter processing appropriate to each characteristic is performed on a frame-by-frame basis for both the required illumination correction and image correction. Because the change of illumination brightness is the change of white and black, it is easy to recognize visually, so filter processing with a long time constant is performed. On the other hand, because the change of image correction amount is the change of halftone, it is difficult to cause Note that emphasis is placed on adaptability to scene transitions of moving images, and filtering processing with a short time constant is performed. According to this, it is possible to realize the image correction accompanying the scene transition of the dynamic image, and at the same time, it is possible to effectively suppress the flicker accompanying the adaptive correction of the lighting.

Also, if each filtering process is performed independently, the balance between illumination correction and image correction may be disrupted and image quality may be degraded. Therefore, the first filtering process is performed on the required illumination brightness in units of frames, and the image correction amount is obtained based on the result, and the second filtering process is performed on the image correction amount (a structure for performing serial processing is adopted). Since the amount of image correction corresponding to the amount of light reduction is calculated after the amount of light reduction of the illumination luminance is calculated, the balance between the first and second filtering processes can usually be ensured.

FIG. 5 is a diagram for explaining the outline of the image display control device of the present invention and the contents of filtering processing. That is, FIG. 5(A) is a block diagram showing the overall structure of the image display control device, FIG. 5(B) is a block diagram further specifically showing the structure shown in FIG. 5(A), and FIG. 5(C) is a block diagram showing the dimming control Fig. 5(D) is a diagram showing the time constant of the filtering process performed during image correction.

As shown in Figure 5(A), the maximum value among the average values of input brightness (Y), blueness (Cb), and redness (Cr) (denoted as Wave) is linearly processed on the input signal ( C), calculate the backlight brightness (K), and filter the backlight brightness (K) through the time axis filter 22 with a long time constant, so as to obtain the final backlight brightness (representing the dimming coefficient of the backlight brightness after dimming) Kflt . The characteristics of the time axis filter 22 are controlled by the filter coefficient P. The relationship between the value of the filter coefficient P and the rate of change (ΔYave) of the average luminance of the image is shown in FIG. 5(C).

Based on the final backlight brightness (Kflt), the correction amount Gym of brightness correction and chromaticity correction is calculated by the image correction amount calculation unit 24 . The image correction amount Gym is filtered by the time axis filter 26 whose time constant is set to be short, thereby obtaining the final image correction amount (Gy'). The characteristics of the time axis filter 26 are controlled by the filter coefficient q. The relationship between the value of the filter coefficient q and the rate of change (ΔYave) of the average luminance of the image is shown in FIG. 5(D).

As shown in FIG. 5(B), the time-axis filter 22 for backlight is a recursive (IIR) filter, and the time-axis filter 26 for image correction is also a recursive (IIR) filter. The transfer function of the time-axis filter 22 for backlight is Hb1[z], and the transfer function of the time-axis filter 26 for image correction amount is Himg[Z]. Therefore, the transfer function of the filter processing in the image display control device is represented by Hb1[z]/Himg[Z]. In addition, the calculation unit 24 for image correction is realized by a non-linear transfer function. In addition, in FIG. 5(B), reference numeral 28 and reference numeral 30 denote delay elements.

Embodiments of the present invention will be described below with reference to the drawings.

(first embodiment)

(Installation form of the image display control unit)

FIG. 6(A) to FIG. 6(D) are block diagrams for explaining the installation form of the image display device of the present invention, respectively.

In FIG. 6(A), an image display control device (image display control LSI) is incorporated in a mobile phone terminal (an example of electronic equipment) 100 . The mobile phone terminal 100 includes an antenna AN, a communication/image processing unit 102, a CCD camera 104, a host computer 106, an image display control device (image display control LSI) 108, a driver 110 (including a panel driver 112 and a backlight driver 114), a display Panel (eg, Liquid Crystal Panel (LCD)) 116, Backlight (LED) 118.

In FIG. 6(B), an image display control device (image display control LSI) 108 is installed in the drive device (driver) 110 itself, and an image is input from the host computer 106 to the image display control device (image display control LSI) 108. signal and control information.

In FIG. 6(C), an image display control device (image display control LSI) 108 is installed in the control device (controller) 130 of the driver 110 . In FIG. 6(D), an image display control device (image display control LSI) 108 is installed in a drive control device (device integrating a driver and a controller) 140 .

The image display control device (image display control LSI) 108 of the present invention has the characteristics of being able to process moving images such as streaming images in real time, excellent power saving, and miniaturization. Therefore, by installing the image display control device (image display control LSI) of the present invention, the drive device (driver) 110, the control device (controller) 130, the drive control device (device integrating the driver and the controller), and electronic equipment 100 added value increased.

(Overall structure of the image display control device)

7 is a block diagram showing an outline of the overall configuration of the image display control device (image display control LSI) of the present invention.

Here, the image display control device 108 is installed in a mobile terminal (including a mobile phone terminal, a PDA terminal, and a portable computer terminal). The portable terminal includes, for example, an antenna AN for receiving one segment broadcasting, a communication/image processing unit 102 , and a host computer 106 . For example, the host computer 106 provides the received streaming video signal to the image display control device 108 . In addition, although an image signal captured by a CCD camera may be supplied to the image display control device 108 (see FIG. 6(A)), the CCD camera is omitted in FIG. 7 .

As shown in Figure 7, the image display control device 108 includes: an image input interface (I/F) 150, which receives an image signal (RGB (color signal form) or YUV (luminance signal and color difference signal form) from the host computer 106. ), when the image signal is RGB, it is converted into an image signal of YUV; register 152 temporarily stores the control information given by host computer 106; image correction core (core) 200 determines the backlight brightness after dimming (dimming coefficient K ), at the same time, image correction processing is performed on the image signal to compensate for the image quality decline caused by light reduction; and an image output interface (I/F) 154, which converts the image signal in YUV form into an image signal in RGB form and outputs, or Direct output in YUV format.

The image correction core 200 includes: a timing part 210, which extracts a synchronous signal from an image signal in the YUV format output by the image input interface (I/F) 150, and generates a timing signal representing the timing of the operation of each part; a histogram making part (statistical information Obtaining part) 212, obtains statistical information required for operation; sequence counter 214; code table 216, stores the microcode after refining the correction algorithm (algorithm); decoder 217, decodes the microcode and generates instructions and data; shared operation The device 218 is constituted by a minimum circuit, and is commonly used for each processing of dimming and image correction; the coefficient buffer 220 temporarily stores correction coefficients for image correction generated by calculation; and the image correction unit 222, The image signal is corrected using the correction coefficient.

FIG. 8 is a diagram showing the contents of control signals supplied from the host computer to the image display control device. From the communication/image processing unit 102 to the host computer 106, for example, an image signal based on MPEG4 is input, and mode information (such as a mode signal specifying a high-definition display mode) is input from the image input interface (I/F) 302 to the host computer 106. ) and image quality information (such as information representing gamma correction, contrast, chroma intensity or scene weighting coefficient information, etc.).

Image signals (RGB format or YUV format) are output from the host computer 106, and gamma correction intensity (L1), contrast intensity (L2), chroma intensity (L3), and scene weighting coefficients for image correction are also output as control information (L4), backlight brightness reduction rate (power saving level: L5), and backlight scene weighting coefficient (L6). The image correction scene weighting coefficient ( L4 ) corresponds to the filter coefficient P in FIG. 5 , and the backlight scene weighting coefficient ( L6 ) corresponds to the filter coefficient q in FIG. 5 .

The control information described above is temporarily stored in the register 152 and then supplied to the shared arithmetic unit 218 . The shared calculator 218 performs predetermined calculations using commands and data from the decoder 217 based on the given control information, and generates correction coefficients and backlight luminance (dimming coefficient Kflt) for image correction.

FIG. 9 is a block diagram showing a specific configuration of the image display control device shown in FIG. 7 . In FIG. 9, the structure of the image correction core 200 is further specifically shown. In addition, in FIG. 9 , the same reference numerals are attached to the same parts as those in FIG. 7 .

In Fig. 9, the shared arithmetic unit 218 includes: first and second multiplexers (400a, 400b); arithmetic logic unit (ALU) 402; distributor 404, which distributes the operation result of the arithmetic logic unit (ALU) ; multiple output destination registers (destination registers) 406. The output destination register 406 includes register groups 408a to 408c divided into output destinations. In addition, a feedback path is formed for feeding back at least part of the calculation results stored in each of the plurality of register sets 408a to 408c to the input sides of the first and second multiplexers (400a, 400b) .

Next, the function and operation of each part of the image correction core 200 in FIG. 9 will be specifically described. The histogram creation unit (statistical information acquisition unit) 212 acquires statistical information (statistical information on luminance and statistical information on chromaticity) of an image signal of one frame. Furthermore, a specific internal configuration of the histogram creation section (statistical information acquisition section) 212 will be described in the third embodiment.

The code table (code storage unit) 216 stores a plurality of microcodes for specifying the operation procedure of the shared arithmetic unit 218 . In addition, the production steps of the code table 216 will be described in the second embodiment.

The sequence counter (sequence instruction unit) 214 instructs (points) the code table 216 and controls the sequence in which microcodes are output from the code table 216 . The decoder 217 decodes the microcodes sequentially output from the code table 216, and generates at least one of instructions and data (coefficients, etc.) to be supplied to the shared arithmetic unit.

Coefficients for calculation are supplied from the decoder 217 to the first and second multiplexers (400a, 400b), and calculation instructions (operation codes (opecode)) are supplied from the decoder 217 to the arithmetic logic operation unit (ALU) 402 , the distribution destination information (destination information) is supplied from the decoder 217 to the distributor 404 .

The shared arithmetic unit 218 calculates the correction coefficient for image correction and the brightness of the backlight after dimming (dimming coefficient Kflt) in real time. Based on the calculation of the shared calculator 218, the resultant digital signal processing described using FIGS. 5(A) to 5(D) is performed. In addition, substantially all of the following serial processing described using FIGS. and the first and second recursive filtering processes.

As described above, the operation of the common arithmetic unit 218 is controlled by the microcode in which the signal processing procedure is coded. By using an arithmetic unit with a common minimum circuit structure, real-time calculation can be realized without parallel installation of the same kind of hardware. Therefore, high-speed dimming control and image correction can be realized with the smallest circuit and the smallest power consumption.

The operation result of the common arithmetic unit 218 is temporarily stored in the register groups 408a to 408c divided into output destinations. The calculated backlight luminance (dimming coefficient Kflt) is output to the backlight (LED) driver, and the correction coefficient is stored in the coefficient buffer 410 . The correction coefficients stored in the coefficient buffer 410 are supplied to the image correction unit 222 in synchronization with the input of the image signal of the next frame to perform image correction (enhancement of brightness and chroma).

In addition, at least a part of the calculation results stored in each of the plurality of register sets 408a to 408c is fed back to the input side of the first and second multiplexers (400a, 400b) through the feedback path. Accordingly, first, the illumination brightness after dimming is obtained, the calculation result is returned to the input side, and the correction coefficient of the image is obtained based on the obtained illumination brightness. And, the above-mentioned first and second recursive (IIR) filtering processes are performed.

(second embodiment)

Next, the procedure for creating the code table shown in FIG. 10 will be described. Fig. 10 is a schematic diagram of the steps of making a code table.

In FIG. 10 , first, according to the displayed image, the backlight for image display is adaptively dimmed, and an algorithm (enhanced computing algorithm) based on a programming language (for example, a high-level programming language) is prepared (step S500), wherein , a programming language used to correct the image signal to compensate for the degradation of image quality caused by backlight dimming.

Then, the algorithm created in the programming language is converted together to generate microcode (step S502).

Next, the generated microcode is written into ROM (read-only memory) (step S503).

In this way, the code table 216 can be made efficiently. In addition, by changing the algorithm (microcode), it is possible to relatively easily change the calculation content of the common arithmetic unit 218 . Therefore, it is possible to flexibly respond to changes in design.

(third embodiment)

In this embodiment, the internal specific structure of the histogram creation part (statistical information acquisition part) 212 shown in FIG. 9 is demonstrated.

As described above, in the image display control device of the present invention, the statistical values related to the luminance and chromaticity of the image signal of one frame are obtained, and based on the statistical values, the backlight luminance and the image signal (chromaticity and luminance) are automatically calculated. Adaptive correction. Also, as described above, when image correction is performed, even if the average luminance is low and the average chromaticity is high, the chromaticity is prioritized over power saving, and correction is performed to limit the dimming rate of the backlight. In order to perform such control, it is necessary to quickly obtain the required statistical value information of brightness and chromaticity.

FIG. 11 is a circuit diagram showing a detailed internal configuration of a histogram creation unit (statistical information acquisition unit) in FIG. 9 . As shown in FIG. 11, a plurality of statistical units (EX0-EX255) for creating a brightness histogram are provided. Any one of EX0～EX255 has the same circuit structure. That is, each statistical unit of a plurality of statistical units (EX0～EX255) used to make a brightness histogram includes: a comparator 1, which compares the brightness value of the input image signal with a reference brightness value (the reference brightness value is in each statistical unit) are all different) for comparison; an up counter (up counter) 2; an "AND" gate (AND gate) 3; and a statistical value buffer 4. The luminance value is set to 256 gray scales, and each reference luminance value corresponding to the reference luminance values (1)-(255) of each gray scale is given to each comparator (EX0-EX255).

The luminance signal (Y) of the image signal is input into each statistical unit (EX0-EX255) in parallel, and through each comparator 1, the reference luminance values (1)-(255) corresponding to each gray scale are compared simultaneously. Each comparator 1 functions as a coincidence detection circuit of the luminance value. When the input luminance value coincides with the reference luminance value, the output of the comparator is at a high level, thereby providing another input to the AND gate 3. The operation clock of the terminal is supplied to the statistical value buffer 4 .

The count value buffer 4 reads and latches the count value of the up counter 2 at the timing of clock supply. In this way, the luminance value of each pixel included in the image signal is classified and counted for each gray scale value. Since the luminance values of the input image are input to each statistical unit in parallel, statistical values can be obtained ultra-fast.

The luminance maximum value/minimum value detector 5 obtains the maximum value and the minimum value of the luminance (Y) from the count value of each statistical unit (EX0-EX255). In addition, the standard deviation calculation unit 6 calculates a standard deviation value representing the distribution of luminance (Y). The statistical values thus calculated are used for adaptive dimming and image correction.

In addition, as shown in the lower side of FIG. 11, a statistical unit ES(Y) for obtaining the average value of brightness (Y) and a statistical unit ES(Y) for obtaining the average value of blueness (Cb) are also provided. Cb), the statistical unit ES (Cr) used to obtain the average value of redness (Cr). Each statistical unit (ES(Y), ES(Cb), ES(Cr)) has the same structure.

That is, each statistical unit (ES(Y), ES(Cb), ES(Cr)) includes: an adder (7a-7c), which accumulates the values of Y, Cb, and Cr; and a total value buffer (8a-7c). 8c), storing the accumulated value. The average calculation units (9a to 9c) respectively calculate and output the average value of luminance (Y), the average value of chroma (Cb), and the average value of chroma (Cr).

As illustrated in Figure 4(C), according to the relationship between brightness (Y) and chromaticity (Cb, Cr), either one of brightness (Y) or chromaticity (Cb, Cr) is selected as the basis for calculating the dimming coefficient . The above-mentioned average value of luminance (Y), average value of chromaticity (Cb), and average value of chromaticity (Cr) are used for such determination.

In addition, the setting purpose of the "AND" gate A1 shown in the lower left of Figure 11 is to turn on (getting) the action clock assigned to each statistical unit (EX0~EX255) according to the statistical value valid signal, and stop the clock as needed supply. Similarly, the setting purpose of the "AND" gate A2 is: according to the average effective signal, open the action clock given to each statistical unit (ES(Y), ES(Cb), ES(Cr)), and stop the clock supply as needed . When it is not necessary to obtain statistical values, the clock supply is stopped and the statistical value acquisition operation is stopped, thereby reducing power consumption.

As mentioned above, the present invention has been described through examples, but the present invention is not limited thereto, and various modifications and applications are possible without departing from the gist of the present invention.

As described above, according to at least one embodiment of the present invention, for example, the following effects can be obtained.

By adopting the arithmetic unit of the microprogram control method, real-time calculation can be performed without setting the same kind of hardware in parallel, and high-speed adaptive dimming control and adaptive image correction can be realized through the smallest circuit and the smallest power consumption.

Since not only the luminance is enhanced but also the chromaticity is enhanced (stretched), the reduction in chromaticity can be suppressed, and the reduction in image quality caused by dimming can be compensated more effectively.

By determining the dimming amount in consideration of both brightness and chromaticity, it is possible to limit the dimming amount in an image with high chromaticity, and it is possible to effectively prevent a decrease in chromaticity caused by excessive dimming.

In both the dimming correction and the image correction, recursive type (IIR) filter processing is performed, and at the same time, by setting the time constant of the filter processing for dimming correction long, it is possible to ensure the accuracy of scene transitions for moving images Adaptability, and can effectively suppress the occurrence of flicker (visual flicker).

By calculating the image correction amount adapted to the dimming amount after calculating the dimming amount of the illumination brightness (using serial processing), it is generally possible to ensure the accuracy of the filter processing with the dimming control and the dimming processing with the image correction. balance.

According to the present invention, the degradation of image quality can be suppressed to a minimum, and at the same time, power consumption can be greatly reduced (a maximum 30% reduction has been confirmed) through adaptive dimming of illumination brightness. Furthermore, since it can be realized with minimum hardware, space saving can be realized.

According to the present invention, it is possible to realize high added value of a driving device (driver), a control device (controller), and a drive control device (a device integrating a driver and a controller) of a liquid crystal display device or the like.

By installing the image display control device (LSI) of the present invention on portable terminals (including mobile phone terminals, PDA terminals, and portable computers), streaming images such as one-segment broadcasting can be displayed with high quality, and the battery life.

According to the present invention, rapidity (real-time performance), low power consumption, and circuit scale increase can be achieved, and at the same time, adaptive dimming of lighting and compensation for image quality degradation caused by dimming can be realized simultaneously. High-precision image correction that is not available in the prior art.

The present invention is used as an image display control device (image display control LSI) for adaptively dimming the brightness of display illumination in accordance with a displayed image, and correcting image signals to compensate for the degradation of image quality caused by the dimming , and a display panel drive device (driver), a display panel control device (controller), a display panel drive control device (a device integrating a driver and a controller), a portable terminal, etc. electronic equipment.

Explanation of reference signs

10 LCD panel 12 Backlight (LED) for illumination

100 Mobile phone terminal (electronic equipment)

102 Communication/Image Processing Department 104 CCD Camera

106 main computer 108 image display control device

110 drivers 112 panel drivers

114 backlight drivers 116 display panels

118 backlight (LED) 150 image input interface (I/F)

152 registers for storing control information from the host computer

154 image output interfaces (I/F) 200 image correction cores

210 Timing Department 212 Histogram Production Department (Statistic Information Obtaining Department)

214 sequence counter 216 code table

217 decoder 218 shared operator

220 coefficient buffer 222 image correction section

400a, 400b first and second multiplexers

402 Arithmetic Logic Unit (ALU)

404 allocator 406 allocation destination register

408a to 408c are divided into register groups for each allocation destination

410 coefficient buffer

Claims (14)

1. image display control apparatus, be used for image being shown that the illumination of usefulness carries out the self-adaptation dim light according to display image, and, picture signal is proofreaied and correct the image quality reduction that causes with the dim light of described illumination with compensation, described image display control apparatus is characterised in that, comprising:

The statistical information obtaining section is used to obtain the statistical information of described picture signal;

Shared arithmetical unit uses from described statistical information obtaining section statistical value information that give, described picture signal, obtains the brightness of illumination behind the dim light, simultaneously, generates the correction coefficient of the correction that is used for described picture signal;

Code storage portion stores a plurality of codes of the action step that is used to specify described shared arithmetical unit;

The order instruction unit, control is from the output order of the described code of described code storage portion; And

Demoder to decoding from the described code of described code storage portion output, and generates and is used for offering the instruction of described shared arithmetical unit and at least one of data.

2. image display control apparatus according to claim 1 is characterized in that,

With order by described order instruction unit indication, export described code successively from described code storage portion, will be as the decoded result of described demoder and the described instruction or the described data that generate offer described shared arithmetical unit, and determine the brightness of illumination behind the described dim light and generate the correction coefficient of the correction that is used for described picture signal by the described shared arithmetical unit that uses described instruction or described data, the output described correction coefficient of use and the described picture signal that was corrected and represent described dim light after the signal of brightness of illumination.

3. image display control apparatus according to claim 1 is characterized in that,

Described shared arithmetical unit comprises first traffic pilot and second traffic pilot, arithmetic logical unit and the divider that distributes the operation result of described arithmetic logical unit,

Provide coefficient to described first traffic pilot and second traffic pilot respectively from described demoder, provide the computing order, provide assignment information to described divider to described arithmetic logical unit.

4. image display control apparatus according to claim 3 is characterized in that,

Described shared arithmetical unit also comprises:

A plurality of output destination registers; And

Feedback path, at least a portion of the signal that described a plurality of output destination registers are stored feeds back to input side.

5. according to each described image display control apparatus in the claim 1 to 4, it is characterized in that,

Described statistical information obtaining section obtains the statistical value of brightness of described picture signal and the statistical value of colourity,

In the correction of the described picture signal of using described correction coefficient, strengthen correction with the corresponding colourity of dim light of the correction of the corresponding brightness of dim light of described illumination and enhancing and described illumination.

6. according to each described image display control apparatus in the claim 1 to 3, it is characterized in that,

Described statistical information obtaining section obtains the statistical value of brightness of described picture signal and the statistical value of colourity,

During brightness of illumination after trying to achieve described dim light, according to the relation between the statistical value of the statistical value of described brightness and described colourity, judge the dim light of preferential described illumination and prevent in the reduction of described colourity which, when preferentially preventing the reduction of colourity, on the basis that the dim light to illumination limits, carry out dim light control.

7. according to each described image display control apparatus in the claim 1 to 6, it is characterized in that,

Described image display control apparatus is respectively to the correction of the described illumination of dim light and use the correction of the described picture signal of described correction coefficient to carry out the Filtering Processing of first recursion type and the Filtering Processing of second recursion type,

The time constant that is used for Filtering Processing correction, described first recursion type of the described illumination of dim light is set to the time constant of being longer than Filtering Processing correction, described second recursion type that is used for described picture signal.

8. image display control apparatus according to claim 7, it is characterized in that, described image display control apparatus is according in the statistical value of the statistical value of described brightness and described colourity at least one, comprise the dim light control of the described illumination of the described first recursion type Filtering Processing, and try to achieve brightness of illumination behind the described dim light, according to the brightness of illumination of trying to achieve, comprise the correction of the described picture signal of the described second recursion type Filtering Processing then.

9. according to claim 7 or 8 described image display control apparatus, it is characterized in that,

Described shared arithmetical unit comprises the feedback path that is used at least a portion of operation result is fed back to input side.

10. according to each described image display control apparatus in the claim 1 to 9, it is characterized in that,

The described code that described code storage portion is stored is the microcode that obtains changing based on the record of the algorithm of programming language, and this programming language is used for described image being shown that the self-adaptation dim light is carried out in the illumination of usefulness and picture signal being proofreaied and correct the image quality reduction that causes with the dim light of described illumination with compensation according to display image.

11. the drive unit of an electrooptical device is equipped with each described image display control apparatus in the claim 1 to 10.

12. the control device of an electrooptical device is equipped with each described image display control apparatus in the claim 1 to 10.

13. the driving control device of an electrooptical device is equipped with each described image display control apparatus in the claim 1 to 10.

14. an electronic equipment is equipped with each described image display control apparatus in the claim 1 to 10.

Images