JP4037817B2 - LCD display screen color adjustment system and method for portable terminal - Google Patents

Description

  The present invention relates to an LCD (Liquid Crystal Display) of a portable terminal. In particular, the present invention relates to an LCD display screen color adjustment system and method for a portable terminal.

  Also, in conventional mobile phones, in order to set the backlight color to a user-friendly favorite color, multiple pulse width modulation circuits built in the control means that change the pulse width and outputs from the multiple pulse width modulation circuits A plurality of LED driving transistors to which the received pulses are input, and a plurality of light emitting diodes that are driven by the outputs of the plurality of LED driving transistors to emit light, and are free backlight colors according to user preferences Can be selected (see, for example, Patent Document 1).

  In the conventional image display device, the color of the specified portion of the input video signal, the color desired for the gamma curve, the default value set in the display to the gamma curve can be easily adjusted, so that it can be easily adjusted. An externally connected pointing device connected externally by radio, an image storage means for storing one frame of an image to be displayed, and a specific screen portion designated by the operator with the pointing device while displaying an image read from the image storage means Includes color adjusting means for adjusting the desired color while checking the hue on the screen, and luminance adjusting means for adjusting the gamma curve to the desired luminance level while viewing the displayed image with the brightness of the display screen A display unit and a CPU for controlling the color adjustment unit and the luminance adjustment unit are provided (for example, see Patent Document 2).

Japanese Patent Laid-Open No. 11-266295 JP 2003-122336 A

By the way, in recent portable terminals having a transmissive LCD, an LCD display with higher resolution and a higher number of colors as compared with a mobile phone having a simple transmissive LCD as described in the above-mentioned Patent Document 1. Furthermore, a camera is mounted on a portable terminal, and an image of the camera is displayed on an LCD.
Further, in recent mobile terminals, products are purchased based on products displayed on the LCD via the Internet.

  In addition, as described in Patent Document 2 of the related art, video information is given to and displayed on the color adjustment unit via the luminance adjustment unit. However, in recent portable terminals having a transmissive LCD, the video information is bright. If it is used in a dark place, the LCD of the mobile terminal will be affected by the reflection of external light. Therefore, in order to make the screen easier to see, the light intensity of the LCD backlight is increased to save power consumption when used in a dark place. In order to achieve this, the light intensity of the LCD backlight is reduced, in other words, the brightness of the LCD backlight is adjusted in accordance with the brightness of the usage environment.

In this way, the color temperature of the LCD backlight changes before and after adjusting the luminance of the LCD backlight after color adjustment, and accordingly, the R (red) component, G (green) component, and B (blue) component There is a problem that the intensity balance is lost, and the desired color adjusted at the folding angle changes.
In such cases, the color temperature of the LCD backlight may not match the user's desired color, or the display color of the LCD via the camera of the mobile terminal may differ slightly from the actual color. .

Further, when purchasing a product via the Internet, if the color of the product displayed on the LCD of the mobile terminal is different from the color of the actual product, a trouble may occur after the product arrives.
Therefore, in view of the above problems, the present invention provides an LCD display of a portable terminal that can easily adjust the R component, the G component, and the B component with respect to the color temperature change accompanying the brightness adjustment of the LCD backlight. An object is to provide a screen color adjustment system and method.

In order to solve the above problems, an LCD display screen color adjustment system for a portable terminal having an LCD that displays video data as an image and an LCD backlight that is a white light source of the LCD. A graphic LSI that receives video data having B component and transmits it to the LCD, and a video color that increases or decreases at least one of the R component, G component, and B component of the video data transmitted by the graphic LSI A luminance adjustment unit that adjusts the luminance of the LCD backlight that emits white light by simultaneously emitting light, and the luminance after the increase / decrease by the video color component increase / decrease unit, comprising a component increase / decrease unit, an R light source, a G light source, and a B light source When the brightness is adjusted by the adjustment unit and the color temperature changes before and after the brightness adjustment of the LCD backlight, the LCD backlight Bets R light, G light, of the B light, and a light-emitting color component adjuster that performs increase or decrease of at least one color component, R component of the video data by the video color component adjuster, G component, and B component In the adjustment to increase / decrease, when the R component, G component, B component of the video data received by the graphic LSI is increased / decreased, the R data, G component, B component of the increased / decreased video data before the increase / decrease An LCD display of a portable terminal, wherein the ratio of R component, G component, and B component is calculated and then the R component, G component, and B component of video data received by the graphic LSI are increased or decreased by the ratio. Provide a screen color adjustment system.

  Further, when a plurality of screens are displayed on the LCD, and the displayed colors are different for each screen, the video color component increasing / decreasing unit is configured to output R component and G component of video data transmitted by the graphic LSI for each screen. When the color temperature changes before and after the brightness adjustment of the LCD backlight by adjusting the brightness by the brightness adjusting unit after increasing or decreasing at least one of the B components and eliminating the screen difference In addition, at least one of the R light source, G light source, and B light source of the LCD backlight is increased or decreased.

  Further, a camera module that captures video is connected to the graphic LSI, and the video color component increasing / decreasing unit for the video data received by the graphic LSI and the video data captured from the camera module is an R component and a G component, respectively. , B component increase / decrease, R component, G component, B component increase / decrease video data is synthesized, brightness adjustment is performed on the synthesized video data by the luminance adjustment unit, and the luminance of the LCD backlight is adjusted When the color temperature changes before and after, at least one of the R, G, and B light sources of the LCD backlight is increased or decreased.

Furthermore, when the LCD backlight causes the R light source, the G light source, and the B light source to emit light intermittently, the light emission time of the R light source, the G light source, and the B light source is set when the luminance adjustment unit adjusts the luminance of the LCD backlight. Simultaneously, the light emission color component increase / decrease unit individually increases or decreases the light emission times of the R light source, G light source, and B light source to be increased or decreased.
Further, each of the R light source, the G light source, and the B light source of the LCD backlight is composed of light emitting diodes, and the luminance adjusting unit and the light emitting color component increasing / decreasing unit simultaneously adjust the light emission time of the light emitting diodes that emit intermittent light, individually Increase or decrease each.

Furthermore, the present invention provides an LCD display screen color adjustment system for a portable terminal having an LCD that displays video data as video and an LCD backlight that is a white light source of the LCD, and an image having R, G, and B components. A graphic LSI that receives data and transmits it to the LCD, and an R component, a G component, and a B component of video data that are received by the graphic LSI. The B component is adjusted to increase or decrease at least one component, and the R component, G component, and B component of the video data that have been increased or decreased, and the R component and G component of the video data received by the graphic LSI after adjustment The image color component increase / decrease unit for increasing / decreasing the B component, the R light source, the G light source, and the B light source, which emit white light at the same time. When the LCD backlight causes the R light source, the G light source, and the B light source to emit light intermittently, a brightness adjusting unit that simultaneously adjusts the light emission times of the R light source, the G light source, and the B light source to adjust the brightness of the LCD backlight; After the increase / decrease by the color component increase / decrease unit, the luminance adjustment unit adjusts the luminance, and when the color temperature changes before and after the luminance adjustment of the LCD backlight, among the R light source, G light source and B light source of the LCD backlight A light emission color component increasing / decreasing unit that individually increases / decreases the light emission time for at least one light source and increases / decreases the color component, and increases / decreases the R component, G component, and B component of the video data by the video color component increasing / decreasing unit. In the adjustment, when the R component, G component, and B component of the video data received by the graphic LSI are increased or decreased, the R component, G component, or B component of the increased or decreased video data is increased or decreased. After obtaining the ratios of the R component, G component, and B component of the video data before the image data, the graphic LSI receives the R component, G component, and B component of the video data received by the video color component increase / decrease unit at the ratio. Provided is an LCD display screen color adjustment system for a portable terminal characterized by increasing or decreasing.

  Furthermore, the present invention provides an LCD display screen color adjustment system for a portable terminal having an LCD for displaying video data as an image and an LCD backlight as a white light source of the LCD, and an image having an R component, a G component, and a B component. When a graphic LSI that receives data and transmits it to the LCD and a plurality of screens are displayed on the LCD and the colors displayed on the screens are different, the R component of the video data received by the graphic LSI, G At least one of the R component, G component, and B component of the video data transmitted by the graphic LSI for each screen with respect to the component and B component is increased or decreased, and the R component and G component of the increased or decreased video data are obtained. Video color component that increases or decreases the R component, G component, and B component of the video data received by the graphic LSI after adjustment at the ratio of B, B components When the LCD backlight, which is composed of a subtractor, an R light source, a G light source, and a B light source and emits white light simultaneously to generate white light, causes the R light source, the G light source, and the B light source to emit light intermittently, By eliminating the difference between the R component, the G component, and the B component, and simultaneously adjusting the light emission times of the R light source, the G light source, and the B light source to adjust the luminance of the LCD backlight, and the video color component increasing / decreasing unit When the brightness is adjusted by the brightness adjusting unit after the increase / decrease and the color temperature changes before and after the brightness adjustment of the LCD backlight, at least one of the R light source, G light source, and B light source of the LCD backlight And a light emission color component increasing / decreasing unit for individually increasing / decreasing the light emission time to increase / decrease the color component.

  Furthermore, the present invention provides an LCD display screen color adjustment system for a portable terminal having an LCD that displays video data as video and an LCD backlight that is a white light source of the LCD, and an image having R, G, and B components. A graphic LSI that receives data and transmits it to the LCD, and is incorporated in the portable terminal, captures video data having an R component, a G component, and a B component, and synthesizes the captured video data with the video data received by the graphic LSI For each of video data synthesized by the graphic LSI and the camera module for the R, G, and B components, among the R, G, and B components of the video data transmitted from the graphic LSI, Adjust to increase / decrease at least one component, and increase / decrease the R component, G component, B component of the video data A video color component increase / decrease unit for increasing / decreasing the R component, G component, and B component of video data received by the video color component increase / decrease unit after adjustment, and an R light source, a G light source, and a B light source. When the LCD backlight that emits white light causes the R, G, and B light sources to intermittently emit light, the luminance of the LCD backlight is adjusted by simultaneously adjusting the light emission times of the R, G, and B light sources. A luminance adjusting unit, and adjusting the luminance by the luminance adjusting unit after increase / decrease by the video color component increasing / decreasing unit, and when the color temperature changes before and after the luminance adjustment of the LCD backlight, the R light source of the LCD backlight, An LCD display image of a mobile terminal, comprising: a light emission color component increase / decrease unit that individually increases or decreases the light emission time for at least one of the G light source and the B light source and increases or decreases the color component To provide a color adjustment system.

Furthermore, the present invention provides an LCD display screen color adjustment method for a portable terminal having an LCD that displays video data as video and an LCD backlight that is a white light source of the LCD, and an image having an R component, a G component, and a B component. Receiving the data and transmitting it to the LCD; and at least one of the R component, G component, and B component of the video data transmitted for the R component, G component, and B component of the received video data Adjusting and increasing / decreasing the ratio, and increasing / decreasing the R component, G component, and B component of the video data received after the adjustment at the ratio of the increased R component, G component, and B component of the video data; The LCD backlight, which consists of an R light source, a G light source, and a B light source after increasing / decreasing the R component, G component, and B component of the video data, and emits white light at the same time, emits the R light source, G light source, and B light source. The step of adjusting the luminance of the LCD backlight by adjusting the light emission time of the R light source, the G light source, and the B light source at the same time, adjusting the luminance of the LCD backlight, and adjusting the luminance of the LCD backlight. A step of individually increasing / decreasing a light emission time for at least one of the R light source, the G light source, and the B light source of the LCD backlight when the color temperature changes before and after ; In the adjustment for increasing / decreasing the R component, G component, and B component, when the R component, G component, and B component of the received video data are increased / decreased, the R component, G component, and B component of the increased / decreased video data are increased / decreased. A step of increasing or decreasing the R component, G component, and B component of video data received after obtaining the ratio of the previous video data to the R component, G component, and B component by the ratio. To provide a CD display screen color adjustment method.

As described above, according to the present invention, depending on the light emission color of the LCD of the mobile terminal, it may not match the user's preference, but by adjusting the light emission color, particularly before and after adjusting the brightness of the LCD. Since the change of the color temperature is prevented, it is possible to expect the effect that the dissatisfaction that it does not suit the taste is eliminated.
Also, when purchasing a product from the mobile terminal via the Internet, if the color of the actual product and the product displayed on the LCD of the mobile terminal are different, trouble may occur after the arrival of the product. If the emission color of the LCD is adjusted according to the color chart before purchase, the difference in the emission color is eliminated, and the above-described trouble can be prevented in advance.

In addition, even when a plurality of screens are displayed on the LCD, the colors displayed on the screen can be matched with each other.
In the case of a mobile terminal with a camera, by adjusting the color displayed on the LCD through the camera module, the image captured by the camera module and the actual color can be matched, and the color of the background screen can be matched. It became so. This makes it possible to convey the correct color to the other party.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a schematic configuration of an LCD display screen color adjustment system for a portable terminal according to the present invention.
As shown in the figure, the LCD display screen color adjustment system of the mobile terminal has a display screen color for the transmissive LCD 13 of the mobile terminal that displays video data having R component, G component, and B component as video. Make adjustments.

A graphic LSI 12 is provided in the LCD display screen color adjustment system of the portable terminal. The graphic LSI 12 has a function of receiving video data and video control data having an R component, a G component, and a B component via the video control line 15 and transmitting the video data to the graphic LSI 12 via the video line 16.
Further, the graphic LSI 12 is provided with a video color component increasing / decreasing unit 12A, and the video color component increasing / decreasing unit 12A according to the video control data received by the graphic LSI 12 includes at least one of the R component, G component, and B component of the received video data. It has a function of executing an operation of increasing / decreasing one color component to increase / decrease the video color component to be transmitted to the LCD 13.

As a result, the color of the LCD of the portable terminal does not match the user's preference, but adjusting the color is expected to eliminate the dissatisfaction that it does not match the preference.
Further, the LCD display screen color adjustment system of the portable terminal is provided with an LCD backlight 14, which is a white light source of the LCD 13 and emits three light sources that independently emit R component, G component, and B component. It consists of light sources such as R, G, and B light emitting diodes (LEDs), and has a function of developing white light by simultaneously emitting light.

Further, the LCD backlight 14 is provided with a luminance adjusting unit 14A and a light emission color component increasing / decreasing unit 14B. The luminance adjusting unit 14A has a function of adjusting the luminance of white light of the LCD backlight 14, and the light emission color component increasing / decreasing unit 14B increases or decreases at least one color component of the three light emission sources of the LCD backlight 14. It has a function.
This makes it possible to adjust the brightness of the LCD of the LCD backlight 14, and as described above, the color of the video data is adjusted, and the color temperature of the LCD backlight 14 at this time and the color temperature before adjustment are adjusted. If they are different, the color of the video data displayed on the LCD changes depending on the brightness of the LCD, but it is possible to prevent the influence of the color temperature by adjusting the color components of the three light emission sources of the LCD backlight 14. .

  Further, a display screen adjustment control unit 11 is provided in the LCD display screen color adjustment system of the portable terminal. The display screen adjustment control unit 11 is constituted by a CPU (Central Processing Unit) and is connected to the graphic LSI 12 via the video control line 15. Is connected to the LCD backlight 14 via the LCD backlight control line 17 to form the above video control data for controlling the video to the LCD 13 for the graphic LSI 12, and to the LCD backlight 14. On the other hand, it has a function of controlling brightness adjustment.

  Further, the display screen adjustment control unit 11 has a function of controlling the video color component increasing / decreasing unit 12A of the graphic LSI 12 to increase / decrease the video color component, and the luminance adjusting unit 14A of the LCD backlight 14 is controlled. The luminance is controlled, and the emission color component increase / decrease unit 14B is controlled to increase / decrease the emission color component.

In the above description, the entire screen of the LCD 13 is assumed. Since a plurality of screens may be displayed on the LCD 13, the colors displayed on the screens may be different. In this case, the video color component increasing / decreasing unit 12A of the graphic LSI 12 increases / decreases at least one of the R component, G component, and B component of the video data for each screen, and the video to be transmitted to the LCD 13 Executes an operation to increase / decrease the color component. In this way, after eliminating the difference in the colors displayed on the plurality of screens, the operation by the luminance adjusting unit 14A and the emission color component increasing / decreasing unit 14B of the LCD backlight 14 is performed.
In this way, the present invention can be applied to a plurality of screens.

Regarding video data received by the graphic LSI 12, as an example, when R: G: B = 5: 6: 5, more specifically, the R component is 5 bits, the G component is 6 bits, and the B component is 5 bits. To do. In this case, the color can be changed by 5 bits for the R component, 6 bits for the G component, and 5 bits for the B component.
The video color component increasing / decreasing unit 12A reduces the 5-bit data of the R component to weaken red and increases the 5-bit data of the R component to strengthen red in a specific video.

Similarly, in a specific image, the G component 6-bit data is reduced to reduce the green color, and the G component 6-bit data is increased to increase the green color.
Similarly, in a specific video, the B component 5-bit data is reduced to weaken the blue color, and the B component 5-bit data is increased to increase the blue color.
Next, the 5 bits of the R component, the 6 bits of the G component, and the 5 bits of the B component are not always fixed, so it is necessary to reflect the adjusted values as follows.

FIG. 2 is a diagram for explaining an operation example in which the color component of the video data is reduced by the video color component increasing / decreasing unit 12A of the graphic LSI 12 in FIG.
As shown in FIG. 5A, before the R component reduction adjustment by the video color component increasing / decreasing unit 12A, if the R component 5-bit data received by the graphic LSI 12 is a1, the R component 5 transmitted by the graphic LSI 12 is transmitted. The bit data is also a1.

In the adjustment for reducing the R component by the video color component increasing / decreasing unit 12A, if the R component 5-bit data received by the graphic LSI 12 is a1, the R component 5-bit data transmitted by the graphic LSI 12 is b1 (<a1). .
After the adjustment in which the R component is reduced by the video color component increasing / decreasing unit 12A, if the 5-bit data of the R component received by the graphic LSI 12 is a1 ′ using the ratio b1 / a1, the R component 5 transmitted by the graphic LSI 12 The video color component increasing / decreasing unit 12A performs calculation so that the bit data is b1 ′ (= a1 ′ × b1 / a1).

Similarly, as shown in FIG. 6B, before the video component reduction / adjustment unit 12A adjusts the reduction of the G component, assuming that the R component 5-bit data received by the graphic LSI 12 is a2, the G transmitted by the graphic LSI 12 is transmitted. The 6-bit data of the component is also a2.
In the adjustment for decreasing the G component by the video color component increasing / decreasing unit 12A, if the G component 6-bit data received by the graphic LSI 12 is a2, the R component 5-bit data transmitted by the graphic LSI 12 is b2 (<a2). .

After the adjustment in which the G component is reduced by the video color component increasing / decreasing unit 12A, if the 6-bit data of the G component received by the graphic LSI 12 is a2 ′ using the ratio b2 / a2, the R component 6 transmitted by the graphic LSI 12 is transmitted. The video color component increasing / decreasing unit 12A performs calculation so that the bit data is b2 ′ (= a2 ′ × b2 / a2).
Similarly, as shown in FIG. 4C, before the B component reduction adjustment by the video color component increasing / decreasing unit 12A, assuming that the 5-bit data of the B component received by the graphic LSI 12 is a3, the graphic LSI 12 transmits R. The 5-bit data of the component is also a3.

In the adjustment for reducing the B component by the video color component increasing / decreasing unit 12A, if the 5-bit data of the B component received by the graphic LSI 12 is a3, the 5-bit data of the R component transmitted by the graphic LSI 12 is b3 (<a3). .
After the adjustment in which the B component is reduced by the video color component increasing / decreasing unit 12A, if the 5-bit data of the R component received by the graphic LSI 12 is a3 ′ using the ratio b3 / a3, the R component 5 transmitted by the graphic LSI 12 is returned. The video color component increasing / decreasing unit 12A performs calculation so that the bit data becomes b3 ′ (= a3 ′ × b3 / a3).

In this way, the graphic LSI 12 can transmit the received video data according to the adjustment result of the color component reduction.
FIG. 3 is a diagram for explaining an operation example in which the color component of the video data is increased by the video color component increasing / decreasing unit 12A of the graphic LSI 12 in FIG.
As shown in FIG. 5A, before the R component increase adjustment by the video color component increasing / decreasing unit 12A, if the R component 5-bit data received by the graphic LSI 12 is a1, the R component 5 transmitted by the graphic LSI 12 is transmitted. The bit data is also a1.

In the adjustment for increasing the R component by the video color component increasing / decreasing unit 12A, if the R component 5-bit data received by the graphic LSI 12 is a1, the R component 5-bit data transmitted by the graphic LSI 12 is b1 (> a1). .
After the adjustment in which the R component is increased by the video color component increasing / decreasing unit 12A, if the 5-bit data of the R component received by the graphic LSI 12 is a1 ′ using the ratio b1 / a1, the R component 5 transmitted by the graphic LSI 12 is returned. The video color component increasing / decreasing unit 12A performs calculation so that the bit data is b1 ′ (= a1 ′ × b1 / a1).

Similarly, as shown in FIG. 7B, before the G component increase adjustment by the video color component increasing / decreasing unit 12A, assuming that the R component 5-bit data received by the graphic LSI 12 is a2, the G that the graphic LSI 12 transmits The 6-bit data of the component is also a2.
In the adjustment for increasing the G component by the video color component increasing / decreasing unit 12A, if the G component 6-bit data received by the graphic LSI 12 is a2, the R component 5-bit data transmitted by the graphic LSI 12 is b2 (> a2). .

After the adjustment in which the G component is increased by the video color component increasing / decreasing unit 12A, if the 6-bit data of the G component received by the graphic LSI 12 is a2 ′ using the ratio b2 / a2, the R component 6 transmitted by the graphic LSI 12 is transmitted. The video color component increasing / decreasing unit 12A performs calculation so that the bit data is b2 ′ (= a2 ′ × b2 / a2).
Similarly, as shown in FIG. 5C, before the B component increase adjustment by the video color component increasing / decreasing unit 12A, assuming that the B component 5-bit data received by the graphic LSI 12 is a3, the graphic LSI 12 transmits R. The 5-bit data of the component is also a3.

In the adjustment for increasing the B component by the video color component increasing / decreasing unit 12A, if the B component 5 bit data received by the graphic LSI 12 is a3, the R component 5 bit data transmitted by the graphic LSI 12 is b3 (> a3). .
After the adjustment in which the B component is increased by the video color component increasing / decreasing unit 12A, if the 5-bit data of the R component received by the graphic LSI 12 is a3 ′ using the ratio b3 / a3, the R component 5 transmitted by the graphic LSI 12 The video color component increasing / decreasing unit 12A performs calculation so that the bit data becomes b3 ′ (= a3 ′ × b3 / a3).

  In this manner, the graphic LSI 12 can perform transmission corresponding to the adjustment result of the increase in the color component for the received video data.

The LCD backlight 14 in FIG. 1 may be always emitted or intermittently emitted. Assuming that the LCD backlight 14 emits light intermittently, the luminance adjustment unit 14A and the light emission color component increase / decrease unit 14B will be described below.
FIG. 4 is a diagram for explaining an operation example by the light emission color component increasing / decreasing unit 14B when the luminance is increased by the luminance adjusting unit 14A of the LCD backlight 14 in FIG.

As shown in FIG. 4A, for example, when the mobile terminal is in a building, the mobile terminal is outside the building, the sky is cloudy in the daytime, or it is raining, the LCD back The luminances of the R light source, the G light source, and the B light source of the light 14 are 100%.
As shown in FIG. 4B, for example, when the outside of the building and the sky is clear until noon, the luminance adjustment unit 14A causes the R backlight source, the G light source, The light emission time (duty ratio) of the light emission sources is increased at the same time, and each luminance is 110%. This is because the screen of the portable terminal is difficult to see due to the reflection of sunlight, so that the brightness of the LCD backlight 14 is increased to prevent the influence of sunlight emission.

As described above, when the luminance of the LCD backlight 14 is increased by the luminance adjustment unit 14A, the LCD backlight 14 emits white light at luminances of 100% and 110%, but the color temperature changes, for example, the B component. May become weaker or stronger.
When the B component becomes weak, as shown in FIG. 4C, the light emission time (duty ratio) is individually increased for the B light source of the LCD backlight 14, and the luminance is increased from 110% to 115%, for example. increase.

When the B component becomes strong, as shown in FIG. 4D, the light emission time (duty ratio) is individually shortened for the B light source of the LCD backlight 14, and the luminance is reduced from 110% to 95%, for example. Let
As a result, the influence of the color temperature of the LCD backlight 14 can be removed.
FIG. 5 is a diagram for explaining an operation example by the light emission color component increasing / decreasing unit 14B when the luminance by the luminance adjusting unit 14A of the LCD backlight 14 in FIG. 1 is decreased.

As shown in FIG. 4A, for example, when the mobile terminal is in a building, the mobile terminal is outside the building, the sky is cloudy in the daytime, or it is raining, the LCD back The luminances of the R light source, the G light source, and the B light source of the light 14 are 100%.
As shown in FIG. 4B, for example, when the illumination is dark inside the building, or when the surroundings are dark outside at night, the luminance adjustment unit 14A causes the R light source of the LCD backlight 14 to The light emission time (duty ratio) of the G light source and the B light source is simultaneously shortened so that each luminance is 90%. This is to shorten the light emission time of the LCD backlight 14 and reduce the luminance, thereby preventing the battery of the mobile terminal from being consumed.

As described above, when the luminance adjustment unit 14A shortens the light emission time of the LCD backlight 14 and decreases the luminance, the LCD backlight 14 emits white light at the luminance of 100% and 90%, but the color temperature changes. For example, the B component may become weaker or stronger.
When the B component becomes weak, as shown in FIG. 4C, the light emission time (duty ratio) is increased individually for the B light source of the LCD backlight 14, and the luminance is increased from 90% to 95%, for example. Let

When the B component becomes stronger, as shown in FIG. 4D, the light emission time (duty ratio) is individually shortened for the B light source of the LCD backlight 14, and the luminance is reduced from 90% to 85%, for example. Let
As a result, the influence of the color temperature of the LCD backlight 14 can be removed.

FIG. 6 is a flowchart for explaining an operation example of the display screen adjustment control unit 11 in FIG.
In step S <b> 21, the display screen adjustment control unit (CPU) 11 transmits video data and video control data to the graphic LSI 12 via the video control line 15.
In step S22, under the control of the display screen adjustment control unit 11, the video color component increasing / decreasing unit 12A of the graphic LSI 12 increases or decreases the R component, G component, and B component of the color according to the video control data.

In step S <b> 23, the graphic LSI 12 transmits the increased / decreased video data to the LCD 13 through the video line 16 under the control of the display screen adjustment control unit 11.
In step S24, the LCD 13 increases or decreases under the control of the display screen adjustment control unit 11, and displays the synthesized video data.
In step S <b> 25, the display screen adjustment control unit (CPU) 11 transmits luminance adjustment data and color component increase / decrease data to the LCD backlight 14 via the LCD backlight control line 17.

In step S26, under the control of the display screen adjustment control unit 11, the LCD backlight 14 emits light in an arbitrary color based on the luminance adjustment data and the color component increase / decrease data by the luminance adjustment unit 14A and the emission color component increase / decrease unit 14B.
In step S <b> 27, the display color of the LCD 13 changes due to the influence of the emission color of the LCD backlight 14 under the control of the display screen adjustment control unit 11.
According to the above description, according to the present invention, depending on the light emission color of the LCD of the mobile terminal, the user's preference may not be met. However, by adjusting the light emission color, the color before and after adjusting the brightness of the LCD, in particular. Since the change in temperature is prevented, it can be expected that the dissatisfaction that it does not suit the taste is eliminated.

  Also, when purchasing a product from the mobile terminal via the Internet, if the color of the actual product and the product displayed on the LCD of the mobile terminal are different, trouble may occur after the arrival of the product. If the emission color of the LCD is adjusted according to the color chart before purchase, the difference in the emission color is eliminated, and the above-described trouble can be prevented in advance.

  FIG. 7 is a block diagram showing a schematic configuration of a modification of FIG. As shown in the figure, the camera module 18 is mounted on the portable terminal. Compared to the figure, the camera module 18 is connected to the graphic LSI 12 via the video line 19, and the camera module 18 includes a landscape and a person. The video data having the component, the G component, and the B component is captured, the captured video is converted into video data that can be handled by the graphic LSI 12, and the video data is transmitted to the graphic LSI 12 through the video line 19.

The graphic LSI 12 has a function of synthesizing video data from the display screen adjustment control unit 11 and the camera module 18 and transmitting the synthesized video data to the LCD 13 via the video line 16.
In this way, the processing by the video color component increasing / decreasing unit 12A, the luminance adjusting unit 14A, and the emission color component increasing / decreasing unit 14B is performed on the video data obtained by combining the video from the camera module 18 and the background screen as follows. Done.

FIG. 8 is a flowchart for explaining an operation example of the display screen adjustment control unit 11 in FIG.
As shown in the figure, in step S 31, the display screen adjustment control unit 11 transmits video data and video control data to the graphic LSI 12 via the video control line 15.
In step S <b> 32, the camera module 18 converts the captured video into video data that can be handled by the graphic LSI 12, and transmits the video data to the graphic LSI 12 via the video line 19.

  In step S33, the video color component increasing / decreasing unit 12A of the graphic LSI 12 uses the received video data from the display screen adjustment control unit 11 and the camera module 18 according to the video control data from the display screen adjustment control unit 11, respectively. Increase / decrease G component and B component. This eliminates the difference in the colors displayed for the received video data from the display screen adjustment control unit 11 and the camera module 18, and eliminates the difference from the actual colors.

In step S <b> 34, the graphic LSI 12 synthesizes the video data from the display screen adjustment control unit 11 and the camera module 18 that are increased or decreased under the control of the display screen adjustment control unit 11.
In step S <b> 35, the graphic LSI 12 transmits the combined video data to the LCD 13 through the video line 16 in accordance with the control of the display screen adjustment control unit 11.

In step S36, the LCD 13 increases or decreases under the control of the display screen adjustment control unit 11, and displays the synthesized video data.
In step S <b> 37, the display screen adjustment control unit 11 transmits luminance adjustment data and color component increase / decrease data to the LCD 13 through the LCD backlight control line 17 under the control of the display screen adjustment control unit 11.

In step S38, under the control of the display screen adjustment control unit 11, the LCD backlight 14 emits light in an arbitrary color based on the luminance adjustment data and the color component increase / decrease data by the luminance adjustment unit 14A and the emission color component increase / decrease unit 14B.
In step S39, under the control of the display screen adjustment control unit 11, the display color of the LCD 13 changes under the influence of the emission color of the LCD backlight 14.
In this way, in the case of a mobile terminal with a camera, by adjusting the color displayed on the LCD 13 through the camera module 18, the image captured by the camera module 18 and the actual color can be matched. As a result, an effect that an accurate color can be conveyed to the other party is expected.

  The present invention can also be used for portable notebook personal computers.

It is a block diagram which shows schematic structure in the LCD display screen color adjustment system of the portable terminal which concerns on this invention. It is a figure explaining the operation example which reduces the color component of video data by the video color component increase / decrease part 12A of the graphic LSI12 in FIG. It is a figure explaining the operation example which increases the color component of video data by the video color component increase / decrease part 12A of the graphic LSI 12 in FIG. It is a figure explaining the operation example by the light emission color component increase / decrease part 14B in the case of increasing the brightness | luminance by the brightness | luminance adjustment part 14A of the LCD backlight 14 in FIG. It is a figure explaining the operation example by the light emission color component increase / decrease part 14B in the case of reducing the brightness | luminance by the brightness | luminance adjustment part 14A of the LCD backlight 14 in FIG. 3 is a flowchart for explaining an operation example of a display screen adjustment control unit 11 in FIG. 1. It is a block diagram which shows schematic structure of the modification in FIG. 8 is a flowchart for explaining an operation example of a display screen adjustment control unit 11 in FIG. 7.

Explanation of symbols

11. Display screen adjustment control unit 12. Graphic LSI
12A ... Video color component increase / decrease unit 13 ... LCD
DESCRIPTION OF SYMBOLS 14 ... LCD backlight 14A ... Luminance adjustment part 14B ... Light emission color component increase / decrease part 15 ... Video control line 16, 19 ... Video line 17 ... LCD backlight control line 18 ... Camera module

Claims (9)

In an LCD display screen color adjustment system of a mobile terminal having an LCD that displays video data as video and an LCD backlight that is a white light source of the LCD,
A graphic LSI that receives video data having an R component, a G component, and a B component and transmits the received video data to the LCD;
A video color component increasing / decreasing unit for increasing / decreasing at least one of the R component, G component, and B component of the video data transmitted by the graphic LSI;
A luminance adjustment unit that adjusts the luminance of the LCD backlight, which is composed of an R light source, a G light source, and a B light source, and emits white light at the same time,
When the luminance is adjusted by the luminance adjusting unit after the increase / decrease by the video color component increasing / decreasing unit, and the color temperature changes before and after the luminance adjustment of the LCD backlight, the R light source, G light source, B light source of the LCD backlight A light emission color component increase / decrease unit for increasing / decreasing at least one color component ,
In the adjustment for increasing / decreasing the R component, G component, and B component of the video data by the video color component increasing / decreasing unit, when the R component, G component, and B component of the video data received by the graphic LSI are increased or decreased, After determining the ratio of the R component, G component, and B component of the data to the R component, G component, and B component of the video data before the increase / decrease, the R component, G component, An LCD display screen color adjustment system for a portable terminal, wherein the B component is increased or decreased by the ratio. When a plurality of screens are displayed on the LCD, and the displayed colors are different for each screen, the video color component increasing / decreasing unit performs R component, G component, B of video data transmitted by the graphic LSI for each screen. Among the components, at least one component is increased / decreased, the difference in screen is eliminated, the luminance is adjusted by the luminance adjustment unit, and the color temperature changes before and after the luminance adjustment of the LCD backlight. The LCD display screen color adjustment system for a mobile terminal according to claim 1, wherein at least one color component is increased or decreased among R light source, G light source, and B light source of the LCD backlight. A camera module that captures video is connected to the graphic LSI, and the video color component increasing / decreasing unit for the video data received by the graphic LSI and the video data captured from the camera module respectively includes an R component, a G component, and a B component. Before and after adjusting the brightness of the LCD backlight, the brightness adjustment unit adjusts the brightness of the combined video data by increasing / decreasing the components, combining the video data with the R component, the G component, and the B component being increased / decreased. 2. The LCD display of a mobile terminal according to claim 1, wherein at least one color component is increased or decreased among the R light source, the G light source, and the B light source of the LCD backlight when the color temperature changes. Screen color adjustment system. When the LCD backlight causes the R light source, the G light source, and the B light source to emit light intermittently, and when the luminance adjustment unit adjusts the luminance of the LCD backlight, the light emission times of the R light source, the G light source, and the B light source are simultaneously adjusted. and the emission color component adjuster is R light, G light, and wherein the increasing or decreasing individual emission time of the B light, portable terminal of claim any one of claims 1, 2 or 3 LCD display screen color adjustment system. Each of the R light source, the G light source, and the B light source of the LCD backlight is composed of light emitting diodes, and the luminance adjustment unit and the light emission color component increase / decrease unit simultaneously adjust the light emission time of the light emitting diodes that emit light intermittently, and individually increase and decrease The LCD display screen color adjustment system for a portable terminal according to claim 4 , wherein each of the adjustments is performed. In an LCD display screen color adjustment system of a mobile terminal having an LCD that displays video data as video and an LCD backlight that is a white light source of the LCD,
A graphic LSI that receives video data having an R component, a G component, and a B component and transmits the received video data to the LCD;
Adjustment to increase / decrease at least one of the R component, G component, and B component of the video data transmitted from the graphic LSI with respect to the R component, G component, and B component of the video data received by the graphic LSI A video color component increasing / decreasing unit for increasing / decreasing the R component, G component, and B component of the video data received by the graphic LSI after adjustment at a ratio of the R component, G component, and B component of the increased / decreased video data; ,
When the LCD backlight, which is composed of an R light source, a G light source, and a B light source and emits white light simultaneously to generate white light, causes the R light source, the G light source, and the B light source to intermittently emit light, the light emission time of the R light source, the G light source, and the B light source A brightness adjusting unit that adjusts the brightness of the LCD backlight by simultaneously adjusting
When the luminance is adjusted by the luminance adjusting unit after the increase / decrease by the video color component increasing / decreasing unit, and the color temperature changes before and after the luminance adjustment of the LCD backlight, the R light source, G light source, B light source of the LCD backlight A light emission color component increase / decrease unit that individually increases or decreases the light emission time for at least one light source and increases or decreases color components ,
In the adjustment for increasing / decreasing the R component, G component, and B component of the video data by the video color component increasing / decreasing unit, when the R component, G component, and B component of the video data received by the graphic LSI are increased or decreased, After determining the ratio of the R component, G component, and B component of the data to the R component, G component, and B component of the video data before the increase / decrease, the graphic LSI receives the R component, G component of the received video data. An LCD display screen color adjustment system for a portable terminal, wherein the B component is increased or decreased by the ratio. In an LCD display screen color adjustment system of a mobile terminal having an LCD that displays video data as video and an LCD backlight that is a white light source of the LCD,
A graphic LSI that receives video data having an R component, a G component, and a B component and transmits the received video data to the LCD;
When a plurality of screens are displayed on the LCD and the displayed colors are different for each screen, the graphic LSI is displayed for each screen with respect to the R component, G component, and B component of the video data received by the graphic LSI. At least one of the R component, G component, and B component of the video data transmitted by the method is increased and decreased, and the ratio of the increased R data, G component, and B component of the video data is adjusted to the graphic LSI after adjustment. A video color component increasing / decreasing unit for increasing / decreasing R component, G component, B component of received video data;
When the LCD backlight, which is composed of an R light source, a G light source, and a B light source and emits white light at the same time to generate white light, causes the R light source, the G light source, and the B light source to intermittently emit light, the R component of the video data, G A luminance adjusting unit for adjusting the luminance of the LCD backlight by simultaneously adjusting the light emission times of the R light source, the G light source, and the B light source after eliminating the difference between the component and the B component;
When the luminance is adjusted by the luminance adjusting unit after the increase / decrease by the video color component increasing / decreasing unit, and the color temperature changes before and after the luminance adjustment of the LCD backlight, the R light source, G light source, B light source of the LCD backlight And a light emission color component increasing / decreasing unit for individually increasing / decreasing the light emission time for at least one light source to increase / decrease the color component. In an LCD display screen color adjustment system of a mobile terminal having an LCD that displays video data as video and an LCD backlight that is a white light source of the LCD,
A graphic LSI that receives video data having an R component, a G component, and a B component and transmits the video data to the LCD;
A camera module mounted on the portable terminal for capturing video data having an R component, a G component, and a B component, and synthesizing the captured video data with the received video data;
For each video data synthesized by the graphic LSI, at least one of the R component, G component, and B component of the video data transmitted from the graphic LSI is increased or decreased with respect to the R component, G component, and B component. The video color that is adjusted and the R, G, and B components of the video data that are received by the video color component increasing / decreasing unit after the adjustment at the ratio of the R, G, and B components of the video data that has been adjusted Component increase / decrease part,
When the LCD backlight, which is composed of an R light source, a G light source, and a B light source and emits white light simultaneously to generate white light, causes the R light source, the G light source, and the B light source to intermittently emit light, the light emission time of the R light source, the G light source, and the B light source A brightness adjusting unit that adjusts the brightness of the LCD backlight by simultaneously adjusting
When the luminance is adjusted by the luminance adjusting unit after the increase / decrease by the video color component increasing / decreasing unit, and the color temperature changes before and after the luminance adjustment of the LCD backlight, the R light source, G light source, B light source of the LCD backlight And a light emission color component increasing / decreasing unit for individually increasing / decreasing the light emission time for at least one light source to increase / decrease the color component. In an LCD display screen color adjustment method for a portable terminal having an LCD that displays video data as an image and an LCD backlight that is a white light source of the LCD,
Receiving video data having R component, G component, and B component and transmitting them to the LCD;
Adjusting to increase or decrease at least one of the R component, G component, and B component of the transmitted video data with respect to the R component, G component, and B component of the received video data;
A step of increasing / decreasing the R component, G component, and B component of the video data received after adjustment at a ratio of the R component, G component, and B component of the increased / decreased video data;
The LCD backlight, which consists of an R light source, a G light source, and a B light source after increasing / decreasing the R component, G component, and B component of the video data, and emits white light at the same time, intermittently connects the R light source, G light source, and B light source. Adjusting the brightness of the LCD backlight by simultaneously adjusting the light emission time of the R light source, the G light source, and the B light source;
When the brightness of the LCD backlight is adjusted and the color temperature changes before and after the brightness adjustment of the LCD backlight, light is emitted from at least one of the R light source, G light source, and B light source of the LCD backlight. A process of increasing / decreasing color components by increasing / decreasing time individually ;
In the adjustment for increasing / decreasing the R component, G component, and B component of the video data, when the R component, G component, and B component of the received video data are increased / decreased, the R component, G component, and B component of the increased / decreased video data are increased. And calculating the ratios of the R component, G component, and B component of the video data before the increase / decrease, and then increasing / decreasing the R component, the G component, and the B component of the received video data by the ratio. LCD display screen color adjustment method for mobile terminals.

Images