JP7056147B2 - Display device, control method and program of display device - Google Patents

Description

The present invention relates to a display device, a control method and a program of the display device.

In recent years, self-luminous panels such as organic EL panels have been used in many display devices such as televisions, monitors, tablet computers, smartphones, watches, and portable game machines. This self-luminous panel has low power consumption because the voltage required for light emission is low, and when self-luminous is stopped, unnecessary colors are not displayed and black has a high contrast ratio that can be clearly displayed. There is a feature of.

Further, Patent Document 1 describes a display device in which a liquid crystal panel whose polarization state and scattering intensity of transmitted light changes according to an applied state of an electric field is laminated on an organic EL panel.

Japanese Unexamined Patent Publication No. 2002-072207

However, in the display device described in Patent Document 1, when displaying white, the lower organic EL panel is turned on to emit white light, and the upper liquid crystal panel is turned on to emit light from the lower layer. Since it is necessary to make it transparent, the power consumption of the display device increases.

Therefore, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a display device that realizes low power consumption when displaying white, a control method of the display device, and a control program. do.

In order to achieve the above object, the present invention is grasped by the following configuration.
The display device of the present invention is arranged so as to overlap the first display means having a light emitting function and the visual side of the first display means, and by controlling the electric field, a second display means capable of displaying white is possible. When,
When white display is performed in the overlapped region in which the light emitting region of the first display means and the drive region of the second display means are overlapped with each other, the light emitting region of the first display means is turned off. A region in which the drive region of the second display means is displayed in white and a region in which the light emitting region of the first display means is displayed in white and the drive region of the second display means is in a transparent state. It is provided with a display control means for controlling so as to perform white display by synthesizing and .

The control method of the display device of the present invention is a control method of a display device including a first display means and a second display means arranged on the visual side of the first display means. The first display means has a light emitting function, the second display means is capable of displaying white by controlling an electric field, and the display control means is the first display. When white display is performed in an overlapping region in which the light emitting region of the means and the driving region of the second display means are overlapped with each other, the light emitting region of the first display means is turned off and the second display means is turned off. A region in which the drive region of the display means is displayed in white and a region in which the light emitting region of the first display means is displayed in white and the drive region of the second display means is in a transparent state are combined. It is controlled to display in white.

The program for controlling a display device of the present invention is a program for controlling a display device including a first display means and a second display means arranged so as to be overlapped on the visual side of the first display means. Therefore, the first display means has a light emitting function, and the second display means can display white by controlling an electric field, and the computer can display the first display means. When white display is performed in the overlapped area where the light emitting area of the display means and the drive area of the second display means are overlapped with each other, the light emitting area of the first display means is turned off and the second display means is turned off. A region in which the drive region of the display means is displayed in white and a region in which the light emitting region of the first display means is displayed in white and the drive region of the second display means is in a transparent state are combined. This is to realize a control function for controlling the display in white.

According to the present invention, it is possible to provide a display device that realizes low power consumption when displaying white, a control method for the display device, and a control program.

It is a block diagram which shows the structure of the display device of embodiment. It is a schematic sectional drawing which shows the structure of the display device of embodiment. FIG. 3 is a schematic plan view showing (a) an organic EL panel and (b) a liquid crystal panel of the display device of the embodiment. It is schematic cross-sectional view which shows (a) on state (transmission state), (b) off state of the liquid crystal panel of embodiment. It is a schematic diagram which shows the display state of the display device of an embodiment. It is a flowchart which shows the display control operation of the display device of embodiment. It is a flowchart which shows the other display control operation of the display device of embodiment.

Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described in detail with reference to the drawings. In the embodiments of the present specification, the same elements are designated by the same reference numerals throughout.
FIG. 1 is a block diagram showing the configuration of the display device 1 of the embodiment. FIG. 2 is a schematic cross-sectional view showing the configuration of the display device 1 of the embodiment. FIG. 3 is a schematic plan view showing (a) an organic EL panel 10 and (b) a liquid crystal panel 20 of the display device 1 of the embodiment. FIG. 4 is a schematic cross-sectional view showing (a) an on state (transmission state TR) and (b) an off state of the liquid crystal panel 20 of the embodiment.

As shown in FIG. 1, the display device 1 has an organic EL panel 10 as a first display means and a second display means so as to display according to various functions such as a clock function and a position display (GPS) function. It is provided with a liquid crystal panel 20 as a watch (smart watch). However, the display device 1 may be a general one such as a television, a monitor, a smartphone, a tablet, or a personal computer.

Further, the display device 1 has a housing formed in a substantially disk shape, and has a liquid crystal panel 20 on the surface on the viewing side and an organic EL panel 10 on the back side (see FIG. 2). Further, the display device 1 includes a central processing unit (CPU) 30, a storage means 40, a display control means 50, a power supply 60, and the like inside the housing.

As shown in FIG. 3A, the organic EL panel 10 has a light emitting region D1 having a self-luminous function, and for example, in order to emit light of each color of red, green, and blue (RGB), each color is used. Those having an organic light emitting layer LL containing a light emitting organic compound selected accordingly. In the present embodiment, the organic EL panel 10 has a light emitting region D1 on almost the entire surface excluding the edge, and is formed of a plurality of minute pixels.

The organic EL panel 10 includes a transparent glass substrate 11, an ITO transparent electrode 12 as an anode, a hole transport layer 13, an organic light emitting layer LL of each color, an electron transport layer 15, and a cathode 16. It has a general structure of a full-color type (see FIG. 2). The power consumption W1 of such an organic EL panel 10 is relatively low.

Then, the organic EL panel 10 can emit each color of RGB by applying a voltage from the power supply 60 between the ITO transparent electrode 12 and the cathode 16 (on state). Then, the organic EL panel 10 can perform at least white display WH in the light emitting region D1 by simultaneously emitting all the colors of RGB. The state of FIG. 3A is an off state in which no voltage is applied, and the entire surface is displayed in black.

On the other hand, as shown in FIG. 3B, the liquid crystal panel 20 has a partially formed drive region D2 for diffusing or transmitting light, and for example, a polymer dispersed liquid crystal (Polymer Dispersed Liquid Crystal) is used. It is a twisted nematic type transmissive type having a liquid crystal layer CL including, but is not limited to this, and may be a dynamic scattering type liquid crystal, a phase transition type liquid crystal, or a guest host type liquid crystal. The portion of the liquid crystal panel 20 other than the drive region D2 is made of a transparent material capable of transmitting light and allowing the organic EL panel 10 on the back surface side to be visually recognized.

The liquid crystal panel 20 includes a transparent glass substrate 21, a transparent ITO common electrode 22, a liquid crystal layer CL, a transparent ITO pixel electrode 24, a transparent glass substrate 25, and a polarizing plate 26 on the outermost surface. It has a general structure with and (see FIG. 2). However, the polarizing plate 26 may not be provided in some cases.

In the present embodiment, the drive region D2 is formed by, for example, a 7 × 17 dot matrix pattern drive region d21 and, for example, a 4-digit 7-segment digital pattern drive region d22. At this time, in the drive area d21, for example, characters, symbols, simple figures, etc. can be displayed, and in the drive area d22, the time (hour, minute, second) and the like can be displayed.

Then, the liquid crystal panel 20 controls the electric field by applying a voltage from the power supply 60 between the ITO common electrode 22 and the ITO pixel electrode 24 (on state), and causes the liquid crystal of the liquid crystal layer CL to move in the electric field direction. It can be oriented and light can be transmitted from the back side. That is, in the liquid crystal panel 20, when the drive region D2 is turned on, the liquid crystal is oriented along the electric field, so that the liquid crystal layer CL becomes a transmission state TR through which light is transmitted (see FIG. 4A). The display (light) of the organic EL panel 10 is transmitted. On the other hand, in the liquid crystal panel 20, when the drive region D2 is turned off, the liquid crystal loses its orientation, so that the liquid crystal layer CL diffuses or scatters light from the outside (see FIG. 4B). , White display WH becomes possible. The state of FIG. 3B is an off state in which no voltage is applied, the drive region D2 is a white display WH, and the portion painted in gray is actually a transparent material. (This part is also included in the transmission state TR).

By the way, since the display device 1 arranges the liquid crystal panel 20 on the visual side of the organic EL panel 10 so that the light emitting region D1 of the organic EL panel 10 and the drive region D2 (d21, d22) of the liquid crystal panel 20 are arranged. An overlapping region and a non-overlapping region where the light emitting region D1 of the organic EL panel 10 and the drive region D2 (d21, d22) of the liquid crystal panel 20 do not overlap are formed. However, the overlapping region coincides with the driving region D2 (d21, d22).

Next, the CPU 30 operates by supplying electric power from the power source 60, and controls the overall operation of the display device 1 according to various programs such as a control program in the storage means 40. For example, when using the clock function, data is output or a display signal is output.

Further, the CPU 30 configures the display device 1 (computer) so as to realize a function executed by various means in the control operation of the display device 1 described later.

The storage means 40 includes, for example, a ROM, a flash memory, and the like, and stores programs, applications, data, and the like for realizing various functions and the like. The storage means 40 may include a detachable portable memory (recording medium) such as an SD card or a USB memory, or is configured to be stored in a storage area of an external information processing device (not shown). It may be a thing.

The display control means (controller) 50 controls the display of the organic EL panel 10 and the liquid crystal panel 20 in cooperation with the CPU 30, and is a light emitting region of the organic EL panel 10 according to the display signal output from the CPU 30. The on / off of the voltage application from the power source 60 to the drive region D2 of the liquid crystal panel 20 and the liquid crystal panel 20 is controlled.

Further, the controller 50 can display characters, symbols, simple figures, patterns, etc. by using individual pixels of the organic EL panel 10, individual dots, segments, etc. of the liquid crystal panel 20, but a specific voltage. Since the on / off control of application is general, the description thereof will be omitted.

Further, the controller 50 additionally functions as a white display determining means 51 for determining whether or not a white display instruction is output to the organic EL panel 10 and the liquid crystal panel 20. The white display determining means 51 determines whether or not the output of the white display WH for the overlapping region of the organic EL panel 10 and the liquid crystal panel 20 is included (presence or absence) based on the display signal output from the CPU 30. .. The CPU 30 may function as the controller 50.

Further, although not essential in the present embodiment, the display device 1 additionally includes an illuminance detecting means 70 for detecting the illuminance. The illuminance detecting means 70 has a photodiode, an amplifier, and the like (not shown), and detects the illuminance IL around the display device 1.

Here, a case where an image or a pattern is displayed on the display device 1 will be described. FIG. 5 is a schematic view showing a display state of the display device 1 of the embodiment. 5 (a) is a schematic view showing a display state of the organic EL panel 10, FIG. 5 (b) is a schematic view showing a display state of the liquid crystal panel 20, and FIG. 5 (c) is a display device. It is a schematic diagram which shows the display state of 1.

A case will be described in which the display device 1 displays, for example, a semicircular white color and a semicircular black color as shown in FIG. 5C, and the pattern is tilted clockwise by about 15 degrees. This pattern is only an example, and various patterns can be displayed with the same technical idea.

As shown in FIG. 5B, the liquid crystal panel 20 puts a portion included in the range of 15 degrees to 195 degrees with respect to the center C of the drive region D2 into an on state in which a voltage is applied. That is, all of this portion is in a transmitted state TR capable of transmitting light from the back surface side.

On the contrary, the portion included in the range from 195 degrees to 375 degrees (more than 360 degrees and 15 degrees) with respect to the center C of the drive region D2 is turned off without applying a voltage. That is, this portion is formed of a white display WH and a transparent material. However, in FIG. 5B, the portion painted in gray is actually a portion formed by the transmission state TR of the drive region D2 and the transmission state TR of the transparent material, and is painted white. The portion is a white display WH. The straight line connecting 15 degrees and 195 degrees is a virtual dividing line.

On the other hand, as shown in FIG. 5A, the organic EL panel 10 turns off the portion included in the range from 15 degrees to 195 degrees with respect to the center C of the light emitting region D1 without applying a voltage. That is, this portion is a black display BL.

On the contrary, the portion included in the range from 195 degrees to 375 degrees (more than 360 degrees and 15 degrees) with respect to the center C of the light emitting region D1 and the portion corresponding to the non-overlapping region (the portion not corresponding to the overlapping region). Is turned on to apply voltage. That is, this portion becomes a white display WH.

Further, the portion corresponding to the overlapping region is turned off without applying a voltage. That is, this portion is a black display BL. However, in FIG. 5A, the portion painted in black is the black display BL, and the portion painted in white is the white display WH. Further, the black display BL or the white display WH is not formed of dots in the drive region d21 or segments of the drive region d22, but is formed by a plurality of pixels, respectively.

By superimposing the organic EL panel 10 and the liquid crystal panel 20 in such a display state, the display device 1 can display the pattern as shown in FIG. 5 (c). That is, since the portion of the transmission state TR in the liquid crystal panel 20 on the viewing side transmits the state of the organic EL panel 10 on the back side as it is, the black display BL of the organic EL panel 10 remains as it is and the black display BL of the display device 1. Therefore, the white display WH of the organic EL panel 10 becomes the white display WH of the display device 1 as it is. Further, the white display WH portion of the liquid crystal panel 20 becomes the white display WH of the display device 1 as it is without being affected by the black display BL of the organic EL panel 10 on the back side.

Next, the display control operation of the display device 1 will be described. FIG. 6 is a flowchart showing a display control operation of the display device 1 of the embodiment.

First, at the start, the power 60 of the display device 1 is turned on, the organic EL panel 10 and the liquid crystal panel 20 are activated, and the controller 50 is activated, and the process proceeds to step S1.

When the CPU 30 instructs the display output in step S1, the process proceeds to step S2.

In step S2, the white display determining means 51 determines whether or not the white display WH (output) is present in the overlapped region. If there is a white display WH (output) for the overlapped area (YES), the process proceeds to step S3, and if there is no white display WH (output) for the overlapped area (NO), the process proceeds to step S5. ..

If YES in step S2, in step S3, the controller 50 turns off the light emitting region D1 of the organic EL panel 10 in the overlapping region, and proceeds to step S4.

In step S4, the controller 50 sets the drive area D2 (d21, d22) of the liquid crystal panel 20 in the overlapping area to the white display WH, and returns to step S1.

If NO in step S2, in step S5, the controller 50 displays the light emitting region D1 of the organic EL panel 10 in the overlapping region in each color, and proceeds to step S6.

In step S6, the controller 50 sets the drive region D2 (d21, d22) of the liquid crystal panel 20 in the overlapping region to the transmission state TR, and returns to step S1.

In this way, the display device 1 can switch the display state of the organic EL panel 10 and the liquid crystal panel 20 depending on the presence or absence of the white display WH with respect to the overlapped region. When there is no output of the white display WH for the overlapped region or there are outputs of various displays for the non-overlapping region, only the light emitting region D1 of the organic EL panel 10 is passed through the liquid crystal panel 20 in the transmission state TR. Display.

Next, the display control operation of the display device 1 according to the ambient illuminance IL, which is performed when the display device 1 includes the illuminance detecting means 70, will be described. FIG. 7 is a flowchart showing another display control operation of the display device 1 of the embodiment.

First, at the start, the power 60 of the display device 1 is turned on, the organic EL panel 10 and the liquid crystal panel 20 are activated, and the controller 50 is activated, and the process proceeds to step S11.

When the CPU 30 instructs the display output in step S11, the process proceeds to step S12.

In step S12, the illuminance detecting means 70 detects the surrounding illuminance IL according to the instruction from the controller 50, and proceeds to step S13.

In step S13, the controller 50 determines whether or not the detected value of the illuminance IL is equal to or greater than a predetermined value. If the detected value has reached the predetermined value (YES), the process proceeds to step S14, and if the detected value has not reached the predetermined value (NO), the process proceeds to step S16.

If YES in step S13, in step S14, the controller 50 turns off the light emitting region D1 of the organic EL panel 10 and proceeds to step S15.

In step S15, the controller 50 sets the drive area D2 of the liquid crystal panel 20 to the white display WH, and returns to step S11.

If NO in step S13, in step S16, the controller 50 sets the light emitting region D1 of the organic EL panel 10 to the white display WH, and proceeds to step S17.

In step S17, the controller 50 sets the drive region D2 of the liquid crystal panel 20 to the transmission state TR, and returns to step S11.

In this way, the display device 1 can also switch the display state of the organic EL panel 10 and the liquid crystal panel 20 according to the ambient illuminance IL. For example, when the clock function is used in the display device 1, if the surroundings are bright, the liquid crystal panel 20 (driving area d22) is used instead of the low-brightness organic EL panel 10 to display the time in white. By performing WH, low power consumption can be realized. At this time, since the liquid crystal panel 20 diffuses or scatters the ambient light by the liquid crystal layer CL, there is no problem in visibility.

On the contrary, when the surroundings are dark, the light diffused or scattered by the liquid crystal layer CL is not sufficiently strong, so that the light is emitted so as to overlap the drive region d22 of the liquid crystal panel 20 (in the organic EL panel 10) instead of the liquid crystal panel 20. Visibility can be improved by performing a white display WH of the time using the region D1).

As described above, the display device 1 of the present embodiment is arranged so as to overlap the first display means (organic EL panel) 10 having a light emitting function and the visual recognition side of the first display means 10 to control the electric field. By doing so, the second display means (liquid crystal panel) 20 capable of white display WH, the light emitting region D1 of the first display means 10, and the drive region D2 (d21, d22) of the second display means 20 When the white display WH is performed in the overlapped area, the light emitting area D1 of the first display means 10 is turned off, and the white display WH is performed in the drive area D2 (d21, d22) of the second display means 20. It is provided with a display control means 50 for controlling so as to perform the above. As a result, if the first display means 10 and the second display means 20 are arranged so as to overlap each other, the first display means 10 that consumes power is turned off, and the second display means 10 that consumes power is turned off and does not consume power. Since the white display WH can be performed in the drive area D2 (d21, d22) of the display means 20 of the above, it is possible to realize low power consumption of the display device 1 as a whole.

In the embodiment, the first display means 10 has an organic light emitting layer LL containing a luminescent organic compound, and the second display means 20 has a liquid crystal layer CL containing a polymer-dispersed liquid crystal. As a result, the first display means 10 can display each color including white by selecting a luminescent organic compound, and in the second display means 20, the liquid crystal layer CL emits light in the off state. In the diffused and on state, the liquid crystal layer CL can transmit light.

In the embodiment, the display control means (controller) 50 displays a white display WH in a non-overlapping region in which the drive region D2 of the second display means 20 is not overlapped with the light emitting region D1 of the first display means 10. When doing so, the white display WH is controlled to be performed in the light emitting region D1 of the first display means 10. As a result, in the non-overlapping region other than the overlapping region, the white display WH can be performed with the first display means 10 turned on, so that the white display WH can be performed as the entire display device 1.

In the embodiment, the display device 1 includes an illuminance detecting means 70 for detecting the illuminance IL, and the display control means 50 has a first display when the illuminance IL detected by the illuminance detecting means 70 is equal to or more than a predetermined value. The light emitting region D1 of the means 10 is turned off, and the white display WH is controlled in the drive region D2 of the second display means 20. As a result, the light emitting region D1 of the first display means 10 can be turned off and the white display WH can be performed in the drive region D2 of the second display means 20 according to the illuminance IL around the display device 1.

In the embodiment, when the illuminance IL detected by the illuminance detecting means 70 is less than a predetermined value, the display control means 50 performs white display WH in the light emitting region D1 of the first display means 10 and displays the second. The drive region D2 of the means 20 is controlled to be in the transmission state TR. As a result, the drive region D2 of the second display means 20 is set to the transmission state TR according to the illuminance IL around the display device 1, and the white display WH is transmitted through the light emission region D1 of the first display means 10. Can be done.

Although the preferred embodiment of the present invention has been described in detail above, the display device, the control method and the program of the display device according to the present invention are not limited to the above-described embodiment, and are described in the scope of claims. Various modifications and changes are possible within the scope of the gist of the present invention.

(Modification example)
In the above embodiment, the display device 1 automatically switches the display state of the organic EL panel 10 and the liquid crystal panel 20 according to the ambient illuminance IL, but it can be manually switched by pressing a push button or the like. You may.

Further, although the organic EL panel 10 has an organic light emitting layer LL of each color of RGB, it may further have a white organic light emitting layer LL.

In addition, the inventions described in the claims originally attached to the application for this application are added below. The claims described in the appendix are the scope of the claims originally attached to the application for this application.
<Claim 1>
The first display means having a light emitting function and
A second display means that is arranged on the visual side of the first display means and is capable of displaying white by controlling an electric field.
When white display is performed in the overlapped region in which the light emitting region of the first display means and the drive region of the second display means are overlapped with each other, the light emitting region of the first display means is turned off. , A display control means for controlling white display in the drive region of the second display means.
A display device characterized by that.
<Claim 2>
The first display means has an organic light emitting layer containing a light emitting organic compound, and has an organic light emitting layer.
The second display means has a liquid crystal layer including a polymer-dispersed liquid crystal.
The display device according to claim 1.
<Claim 3>
When the display control means performs white display in a non-overlapping region in which the drive regions of the second display means are not overlapped with each other in the light emitting region of the first display means, the display control means of the first display means. Control to display white in the light emitting area,
The display device according to claim 1 or 2, wherein the display device is characterized by the above.
<Claim 4>
Equipped with an illuminance detection means to detect illuminance,
The display control means is
When the illuminance detected by the illuminance detecting means is equal to or higher than a predetermined value, the light emitting region of the first display means is turned off, and white display is performed in the drive region of the second display means. Control,
The display device according to any one of claims 1 to 3, wherein the display device is characterized by the above.
<Claim 5>
When the illuminance detected by the illuminance detecting means is less than a predetermined value, the display control means displays white in the light emitting region of the first display means, and displays the white color in the light emitting region of the first display means, and displays the drive region of the second display means. Is controlled to be transparent,
The display device according to claim 4.
<Claim 6>
A control method for a display device including a first display means and a second display means arranged so as to overlap with each other on the visual recognition side of the first display means.
The first display means has a light emitting function and has a light emitting function.
The second display means can display white by controlling the electric field.
The display control means is
When white display is performed in the overlapped region in which the light emitting region of the first display means and the drive region of the second display means are overlapped with each other, the light emitting region of the first display means is turned off. , Control to display white in the drive region of the second display means.
A method of controlling a display device, characterized in that.
<Claim 7>
A program for controlling a display device including a first display means and a second display means arranged on the visual side of the first display means.
The first display means has a light emitting function and has a light emitting function.
The second display means can display white by controlling the electric field.
On the computer
When white display is performed in the overlapped region in which the light emitting region of the first display means and the drive region of the second display means are overlapped with each other, the light emitting region of the first display means is turned off. , Realizes a control function for controlling white display in the drive region of the second display means.
A program characterized by that.

1 Display device 10 Organic EL panel (first display means)
D1 light emitting region, LL organic light emitting layer 20 liquid crystal panel (second display means)
D2, d21, d22 drive area, CL liquid crystal layer 30 CPU (central processing unit)
40 Storage means 50 Controller (display control means), 51 White display judgment output stage 60 Power supply 70 Illuminance detection means, IL Illuminance WH White display, BL black display, TR transmission state

Claims (7)

The first display means having a light emitting function and
A second display means that is arranged on the visual side of the first display means and is capable of displaying white by controlling an electric field.
When white display is performed in the overlapped region in which the light emitting region of the first display means and the drive region of the second display means are overlapped with each other, the light emitting region of the first display means is turned off. A region in which the drive region of the second display means is displayed in white and a region in which the light emitting region of the first display means is displayed in white and the drive region of the second display means is in a transparent state. And, a display control means that controls to display white by synthesizing and
To prepare
A display device characterized by that. The first display means has an organic light emitting layer containing a light emitting organic compound, and has an organic light emitting layer.
The second display means has a liquid crystal layer including a polymer-dispersed liquid crystal.
The display device according to claim 1. When the display control means performs white display in a non-overlapping region in which the drive regions of the second display means are not overlapped with each other in the light emitting region of the first display means, the display control means of the first display means. Control to display white in the light emitting area,
The display device according to claim 1 or 2, wherein the display device is characterized by the above. Equipped with an illuminance detection means to detect illuminance,
The display control means is
When the illuminance detected by the illuminance detecting means is equal to or higher than a predetermined value, the light emitting region of the first display means is turned off, and white display is performed in the drive region of the second display means. Control,
The display device according to any one of claims 1 to 3, wherein the display device is characterized by the above. When the illuminance detected by the illuminance detecting means is less than a predetermined value, the display control means displays white in the light emitting region of the first display means, and displays the white color in the light emitting region of the first display means, and displays the drive region of the second display means. Is controlled to be transparent,
The display device according to claim 4. A control method for a display device including a first display means and a second display means arranged so as to overlap with each other on the visual recognition side of the first display means.
The first display means has a light emitting function and has a light emitting function.
The second display means can display white by controlling the electric field.
The display control means is
When white display is performed in the overlapped region in which the light emitting region of the first display means and the drive region of the second display means are overlapped with each other, the light emitting region of the first display means is turned off. A region in which the drive region of the second display means is displayed in white and a region in which the light emitting region of the first display means is displayed in white and the drive region of the second display means is in a transparent state. And are combined to control the white display.
A method of controlling a display device, characterized in that. A program for controlling a display device including a first display means and a second display means arranged on the visual side of the first display means.
The first display means has a light emitting function and has a light emitting function.
The second display means can display white by controlling the electric field.
On the computer
When white display is performed in the overlapped region in which the light emitting region of the first display means and the drive region of the second display means are overlapped with each other, the light emitting region of the first display means is turned off. A region in which the drive region of the second display means is displayed in white and a region in which the light emitting region of the first display means is displayed in white and the drive region of the second display means is in a transparent state. To realize a control function that controls to display white by synthesizing and
A program characterized by that.

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