Indication device

Abstract

To improve the display quality of the display device regardless of ambient light intensity. [Solution] The display device comprises a display panel, a decorative layer, a measuring unit, and a display control unit. The decorative layer transmits display light from the display panel and reflects ambient light to display a pattern. The measuring unit measures the intensity of ambient light, and the display control unit controls the display light according to the image displayed by the display panel and the intensity of ambient light.

Description

Technical Field

[0001] This disclosure relates to a display device.

Background Art

[0002] Patent Document 1 discloses a display device in which display light is visible to a user when the display is lit, and a pattern formed on the surface is visible to the user when the display is not lit.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the display device described in Patent Document 1 is irradiated with strong external light, the reflected light of the external light on the surface having the pattern becomes stronger than the display light, making it difficult for the user to visually recognize the display light. In the above display device, even if the display light is made stronger to make it easier for the user to visually recognize the display light, when the external light becomes weak, the display is made with display light of excessive intensity, resulting in a deterioration of the display quality.

Means for Solving the Problems

[0005] A display device according to an aspect of the present disclosure includes a display panel that emits display light, a decorative layer that is located on the display surface side of the display panel, has a pattern in a plan view, transmits at least a part of the display light, and reflects at least a part of the external light to display the pattern, a measurement unit that measures the intensity of the external light irradiated on the decorative layer, an image displayed by the display panel, and a display control unit that controls the display light according to the image displayed by the display panel and the intensity of the external light measured by the measurement unit.

Effects of the Invention

[0006] The display device improves display quality regardless of ambient light intensity. [Brief explanation of the drawing]

[0007] [Figure 1] This is a block diagram of the display device according to Embodiment 1 and a schematic side cross-sectional view of the display unit. [Figure 2] This is a schematic plan view of the display unit according to Embodiment 1. [Figure 3] This graph shows the relationship between ambient light intensity, the brightness of the display device when displaying black, and the voltage applied to the backlight unit, according to Embodiment 1. [Figure 4] This is a block diagram of the display device according to Embodiment 2 and a schematic side cross-sectional view of the display unit. [Figure 5] This is a block diagram of the display device according to Embodiment 3. [Figure 6] This graph shows the relationship between ambient light intensity and the adjustment of the gamma correction of the display device according to Embodiment 3. [Figure 7] This is a block diagram of the display device according to Embodiment 4. [Figure 8] This graph shows the relationship between the reference value of brightness and the brightness before correction for the input grayscale value in the display device according to Embodiment 4. [Figure 9] This flowchart shows a method for creating correction data for a display device according to Embodiment 4. [Modes for carrying out the invention]

[0008] [Embodiment 1] Embodiments of this disclosure will be described below with reference to the drawings. In each drawing, similar components are denoted by the same reference numeral and their descriptions are omitted. Also, in this disclosure, for the sake of simplicity of illustration, the scale and hatching may differ between drawings even for components denoted by the same reference numeral. However, the components shown in each drawing of this disclosure are merely examples, and their scales are not limited to those shown in the drawings. Furthermore, even for components denoted by different hatching in this disclosure, components denoted by the same reference numeral have the same configuration as described above.

[0009] <Overview of the display device> Figure 1 shows a block diagram F11 of the display device 1 described later according to this embodiment and a schematic side cross-sectional view F12 of the display unit 2 described later. Figure 2 is a schematic plan view of the display unit 2 according to this embodiment. In particular, the schematic side cross-sectional view F12 is a cross-sectional view taken along the line AA, indicated by a dashed line, in the schematic plan view of the display unit 2 shown in Figure 2.

[0010] The display device 1 according to this embodiment comprises a display unit 2, a measuring unit 3, and a display control unit 4. The display device 1 displays the pattern 26P of the decorative layer 26, which will be described later, while displaying on the display unit DA of the display unit 2, which will be described later. The measuring unit 3 measures the intensity of ambient light incident on the decorative layer 26 by a method described later. The display control unit 4 controls the display by the display unit 2 according to the image to be displayed on the display unit DA of the display unit 2 and the intensity of ambient light measured by the measuring unit 3, by a method described later.

[0011] <Display Unit: Overview> The display unit 2 will be described in more detail with reference to the schematic side sectional view F12 of FIG. 1 and FIG. 2. The display unit 2 includes a housing 21, a backlight unit 22, a liquid crystal panel 23 as a display panel, an adhesive layer 24, a black frame layer 25, a decorative layer 26, and a transparent substrate 27. As shown in FIG. 2, the display unit 2 has a display portion DA on the central side in plan view, and performs display using backlight light from the backlight unit 22 described later in the display portion DA. The display portion DA may be, for example, substantially rectangular in plan view as shown in FIG. 2, but is not limited thereto, and may have various shapes such as circular.

[0012] <Display unit: Housing> The housing 21 has a space for storing the backlight unit 22 and the liquid crystal panel 23 described later. The shape of the housing 21 is not particularly limited as long as it can store the backlight unit 22 and the liquid crystal panel 23. For example, it may have a substantially rectangular parallelepiped shape with an opening upward.

[0013] <Display unit: Backlight unit> The backlight unit 22 is stored inside the housing 21, and irradiates backlight light to a portion including a portion overlapping the display portion DA in plan view of the liquid crystal panel 23 described later under the control from the backlight control unit 43 described later. Unless otherwise specified in the present disclosure, "backlight light" refers to the backlight light emitted by the backlight unit 22.

[0014] The backlight unit 22 may be able to change the intensity of the emitted backlight light under the control from the backlight control unit 43 described later. In particular, the backlight unit 22 may emit backlight light with different intensities for each part in plan view. In this case, for example, the backlight unit 22 may include a plurality of light emitting elements such as LEDs arranged two-dimensionally in plan view, and each of the plurality of light emitting elements may emit light at each intensity. However, the backlight unit 22 may have various configurations including conventionally known configurations as long as there is no hindrance to the display in the display portion DA described later.

[0015] <Display unit: Liquid crystal panel: Overview> The liquid crystal panel 23 is located inside the housing 21 on the side where the backlight unit 22 irradiates backlight light, for example, above the backlight unit 22. The liquid crystal panel 23 changes the transmittance of the backlight light for each position in plan view by the method described later, and realizes the display in the display unit DA using the transmitted backlight light as display light. In particular, the liquid crystal panel 23 may have a plurality of sub-pixels two-dimensionally arranged at positions overlapping the display unit DA in plan view, and the transmittance of the backlight light irradiated to each sub-pixel may be changed.

[0016] The liquid crystal panel 23 includes, for example, a first polarizing plate 51, a circuit board 52, a liquid crystal layer 53, a color filter layer 54, and a second polarizing plate 55 laminated in order from the side of the backlight unit 22.

[0017] <Display unit: Liquid crystal panel: Polarizing plate> The first polarizing plate 51 and the second polarizing plate 55 are arranged such that the polarization directions of the transmitted light are different from each other. The first polarizing plate 51 and the second polarizing plate 55 may, for example, both include linear polarizing plates and be arranged such that the polarization directions of the linear polarizing plates are orthogonal to each other. Alternatively, the first polarizing plate 51 and the second polarizing plate 55 may, for example, both be circular polarizing plates, and in this case, the first polarizing plate 51 and the second polarizing plate 55 may include a linear polarizing plate and a quarter-wave plate.

[0018] <Display unit: Liquid crystal panel: Circuit board> The circuit board 52 includes, for example, a plurality of electrodes arranged two-dimensionally in a planar view, and a plurality of drive circuits, each including a TFT (Thin Film Transistor), which individually applies a voltage to each of the plurality of electrodes. For example, the circuit board 52 may have electrodes and drive circuits for each sub-pixel. The display unit 2 may include, for example, a driver (not shown) that drives each drive circuit in response to a signal from the input section 42 of the display control unit 4, which will be described later.

[0019] For example, the circuit board 52 may control the potential of each electrode by driving each of the drive circuits in accordance with the control of the display control unit 4, thereby controlling the potential difference between each electrode and the electrodes of the electrode substrate 71 of the color filter layer 54, which will be described later, for each subpixel. The backlight light from the backlight unit 22 may pass through, for example, the electrodes and drive circuits included in the circuit board 52.

[0020] <Display unit: LCD panel: LCD layer> The liquid crystal layer 53 has a liquid crystal 61 and a sealing portion 62.

[0021] The liquid crystal 61 contains crystals dispersed in the liquid that align in a specific direction when a voltage is applied. In particular, the liquid crystal 61 is configured such that the polarization direction of the transmitted light rotates as the applied voltage increases. More specifically, the liquid crystal 61 is configured such that when the applied voltage is greater than a predetermined value, the polarization direction of the transmitted light rotates by approximately 90°. The voltage applied to the liquid crystal 61 may be achieved, for example, by applying a voltage to each electrode contained in the circuit board 52 and by the potential difference between the electrodes of the electrode substrate 71 to which a predetermined voltage, described later, is applied. As a result, the liquid crystal layer 53 controls the polarization direction of the backlight light at each subpixel in a planar view.

[0022] As described above, the first polarizing plate 51 and the second polarizing plate 55 transmit light in different polarization directions. In particular, for example, if the first polarizing plate 51 and the second polarizing plate 55 include linear polarizing plates and the polarization directions of the light transmitted through each are orthogonal, then if the polarization direction of the backlight light transmitted through the first polarizing plate 51 does not change, the backlight light will not pass through the second polarizing plate 55. On the other hand, if the polarization direction of the backlight light transmitted through the first polarizing plate 51 is rotated by the liquid crystal 61, the transmittance of the backlight light through the second polarizing plate 55 changes according to the rotation angle of the polarization direction. In particular, if the polarization direction of the backlight light is rotated by 90° by the liquid crystal 61, the backlight light will pass through the second polarizing plate 55 with almost no reduction in intensity.

[0023] Therefore, the liquid crystal panel 23 controls the intensity of the backlight light transmitted through the liquid crystal panel 23 for each subpixel by controlling the alignment of the liquid crystal 61 by the circuit board 52, for example, and emits the transmitted backlight light as display light.

[0024] The sealing portion 62 joins the circuit board 52 and the color filter layer 54 (described later) on the side surrounding the display unit DA in a plan view, and seals the space between the circuit board 52 and the color filter layer 54 (described later). As a result, the liquid crystal 61 is enclosed within the space surrounded by the sealing portion 62, the circuit board 52, and the color filter layer 54.

[0025] <Display unit: LCD panel: Color filter layer> The color filter layer 54 includes an electrode substrate 71, a plurality of color filters 72, and a black matrix 73.

[0026] The electrode substrate 71 has electrodes to which a predetermined potential is applied, for example, by an auxiliary power supply (not shown). The electrodes on the electrode substrate 71 may be formed in common for multiple subpixels, for example. As a result, the liquid crystal panel 23 may create a potential difference between each electrode of the circuit board 52 and the electrodes of the electrode substrate 71, and control the voltage applied to the liquid crystal 61 for each subpixel to control the transmittance of backlight light for each subpixel.

[0027] Each of the color filters 72 is an optical filter that transmits only light of a specific wavelength, and is formed on each subpixel in a planar view, for example. For example, multiple color filters may include multiple red filters, multiple green filters, and multiple blue filters, and be placed on each subpixel. In this way, the display unit 2 may make the light transmitted through each of the color filters 72 red light, green light, and blue light, respectively, and perform color display on the display unit DA. The color filters 72 may be located on the side of the electrode substrate 71 that faces the backlight unit 22.

[0028] The black matrix 73 is located on the side of the electrode substrate 71 to the backlight unit 22 and, in a plan view, on the side surrounding the display unit DA. The black matrix 73 includes a light-absorbing material such as black carbon that absorbs visible light, including backlight light. In particular, the black matrix 73 may be bonded to the circuit board 52 via a seal portion 62. The black matrix 73 reduces the leakage of backlight light around the display unit DA in a plan view by, for example, absorbing backlight light.

[0029] <Display Unit: LCD Panel: Supplementary Notes> In this embodiment, the liquid crystal panel 23 is not limited to the configuration described above. For example, the liquid crystal panel 23 according to this embodiment may have various conventionally known configurations, as long as it uses liquid crystal to control the transmittance of the backlight light of each part of the display unit DA in a planar view.

[0030] <Display Unit: Adhesive Layer> The adhesive layer 24 adheres the black frame layer 25, decorative layer 26, and transparent substrate 27 (described later) to the housing 21, thereby fixing the black frame layer 25, decorative layer 26, and transparent substrate 27 to the housing 21. The adhesive layer 24 may contain various adhesives, including conventionally known adhesives. Here, the black frame layer 25, decorative layer 26, and transparent substrate 27 may be bonded to each other by a translucent adhesive material (not shown). In this case, the adhesive layer 24 can fix the black frame layer 25, decorative layer 26, and transparent substrate 27 to the housing 21 simply by adhering the black frame layer 25 to the housing 21.

[0031] <Display Unit: Black Border Layer> The black frame layer 25 is located on the periphery of the display unit DA in a plan view and may be formed in a position that overlaps with at least a portion of the black matrix 73 in a plan view. The black frame layer 25 may contain, for example, a light-absorbing material that absorbs visible light, including backlight light, and may contain the same material as the light-absorbing material contained in the black matrix 73. As a result, the black frame layer 25, together with the black matrix 73, reduces the leakage of backlight light around the display unit DA in a plan view.

[0032] <Display Unit: Decorative Layer> The decorative layer 26 is formed in a position that overlaps with the area including the display unit DA in a plan view. The decorative layer 26 has a pattern 26P on the side opposite to the backlight unit 22, in other words, on the side of the display unit DA of the display unit 2 that faces the display direction. The pattern 26P may be various patterns, such as wood grain, and in particular, the exterior of the display unit 2 may be a pattern that harmonizes with the surroundings of the display unit 2.

[0033] The decorative layer 26 transmits at least a portion of the backlight light, or in other words, the display light, that has passed through each part of the liquid crystal panel 23, thereby enabling display in the display unit DA. The decorative layer 26 also reflects at least a portion of the ambient light incident from outside the display unit 2 onto the display surface of the display unit 2, or in other words, onto the side of the transparent substrate 27 of the display unit 2, thereby displaying the pattern 26P.

[0034] Therefore, in a plan view, the display unit 2 achieves display using display light in the portion of the display unit DA that is illuminated by display light that has passed through the liquid crystal panel 23 and the decorative layer 26. On the other hand, in a plan view, the display unit 2 displays the pattern 26P by reflecting ambient light in the portion of the display unit DA and the surrounding area that is not illuminated by the display light.

[0035] Therefore, the display unit 2 harmonizes with its surroundings by allowing the user to see the pattern 26P, and enables various displays to be shown in the display section DA. For clarity in the illustration, in Figure 2 the decorative layer 26 is formed to be located closer to the center than to the periphery of the housing 21 in a plan view, but this is not the only option. For example, the decorative layer 26 may be formed in a position that overlaps with the entire housing 21 in a plan view.

[0036] <Display unit: Transparent substrate> The transparent substrate 27 is located, for example, on the side of the decorative layer 26 opposite to the liquid crystal panel 23. For example, the decorative layer 26 may be bonded to the transparent substrate 27, in which case the transparent substrate 27, together with the decorative layer 26 and the black frame layer 25, is fixed to the housing 21 via the adhesive layer 24, thereby fixing the black frame layer 25, the decorative layer 26, and the transparent substrate 27 to the housing 21. In this case, the display unit 2 makes it easier to fix the black frame layer 25, the decorative layer 26, and the transparent substrate 27 to the housing 21 during manufacturing. In this embodiment, the transparent substrate 27 may have a function to protect the decorative layer 26, or the transparent substrate 27 may be a light-transmitting touch panel substrate, and the display unit 2 may be given the function of a touch panel.

[0037] <Measurement part> Returning to the block diagram F11 in Figure 1, the measurement unit 3 includes a sensor 31 and an intensity acquisition unit 32. As shown in Figure 2, for example, at least one sensor 31 is formed around the decorative layer 26 in a plan view of the display unit 2, and on the side of the transparent substrate 27 that is closer to the decorative layer 26. Therefore, the sensor 31 receives a portion of the ambient light that irradiates the display unit 2, including the decorative layer 26. The intensity acquisition unit 32 acquires the intensity of the ambient light received by each of the sensors 31.

[0038] However, the position of the sensor 31 is not limited to the periphery of the decorative layer 26 in a plan view of the display unit 2, nor is it limited to being on the side of the transparent substrate 27 that is closer to the decorative layer 26. For example, the sensor 31 may be located inside the decorative layer 26 in a plan view of the display unit 2, and on the side of the liquid crystal panel 23 that is closer to the decorative layer 26. In this case, for example, the black frame layer 25 may have a light-transmitting portion that transmits light in the direction of light emission from the display unit 2, and the sensor 31 may be located in a position that overlaps with the light-transmitting portion in a plan view of the display unit 2. Furthermore, the sensor 31 may be located in a position that overlaps with the display unit DA in a plan view of the display unit 2. In this case, the sensor 31 may include a camera or light-receiving element located in the display unit DA, such as a UDC (Under Display Camera).

[0039] For example, sensor 31 may be a light-receiving element that converts received light into a voltage. In this case, intensity acquisition unit 32 may be a voltage measuring device that acquires the intensity of ambient light received by each sensor 31 by measuring the voltage level from sensor 31.

[0040] As a result, the measurement unit 3 measures the intensity of ambient light irradiating the decorative layer 26. The measurement unit 3 may also calculate the ambient light illuminance of the space where the display unit 2 is located from the measured ambient light intensity. If the sensor 31 is located inside the decorative layer 26 in a plan view of the display unit 2, and on the side of the liquid crystal panel 23 that is closer to the decorative layer 26, the measurement unit 3 may measure the ambient light intensity considering the attenuation of ambient light intensity that occurs in the decorative layer 26, etc., until ambient light is incident on the sensor 31.

[0041] In this embodiment, the measurement unit 3 is not limited to a configuration that measures the intensity of ambient light using a sensor 31 incorporated in the display unit 2. For example, the measurement unit 3 may measure the intensity of ambient light using a device installed around the display unit 2. For example, if the display unit 2 is installed on the dashboard of a car, the measurement unit 3 may measure the intensity of ambient light based on information from an in-car camera or ambient light sensor installed around the display unit 2.

[0042] <Display Control Section> Returning to the block diagram F11 in Figure 1, the display control unit 4 includes a generation unit 41, an input unit 42, and a backlight control unit 43.

[0043] The generation unit 41 generates a video signal corresponding to the image to be displayed on the display unit DA of the display unit 2, in response to a signal received from, for example, an antenna (not shown). The input unit 42 inputs the video signal from the generation unit 41 to the display unit 2, particularly the liquid crystal panel 23, and controls the transmittance of backlight light in each part of the display unit DA of the display unit 2. In other words, the display control unit 4 controls the light transmittance at each position of the liquid crystal panel 23 in a plan view through the control of the liquid crystal panel 23. The signal from the input unit 42 may also be input to a driver (not shown) that drives the drive circuit of the circuit board 52 of the liquid crystal panel 23 described above.

[0044] The backlight control unit 43 controls the intensity of the backlight light emitted from each part of the backlight unit 22 by inputting a signal to the backlight unit 22. In particular, in this embodiment, the backlight control unit 43 corrects the intensity of the backlight light emitted from each part of the backlight unit 22 according to the intensity of the ambient light measured by the measurement unit 3.

[0045] Based on the above, the display control unit 4 controls at least the display light in the display unit DA according to the image displayed by the liquid crystal panel 23, which is the display panel, on the display unit DA, and the intensity of ambient light measured by the measurement unit.

[0046] <Backlight intensity correction> The correction of the backlight intensity by the backlight control unit 43 will be explained in more detail with reference to Figure 3.

[0047] Graph G1 in Figure 3 shows the relationship between the ambient light illuminance in the space where the display unit 2 is located and the brightness of each part of the display unit DA when the display on the display unit 2 is showing black. In graph G1, the horizontal axis represents ambient light illuminance (unit: lx), and the vertical axis represents the brightness (unit: nit).

[0048] Graph G2 in Figure 3 shows the relationship between the ambient light intensity and the voltage applied to the backlight unit 22 of the display unit 2 when the display section DA of the display unit 2 is showing black. In graph G2, the horizontal axis represents ambient light intensity (unit: lx), and the vertical axis represents the applied voltage (unit: V).

[0049] For example, as the ambient light intensity in the space where the display unit 2 is located increases, the intensity of ambient light reflected by the decorative layer 26 increases. In particular, when ambient light intensity is high, the intensity of ambient light reflected by the decorative layer 26, which contributes to the display of the pattern 26P on the decorative layer 26, may become higher than the intensity of the display light in the display section DA of the display unit 2. In this case, the display in the display section DA may become difficult for the user to see, and consequently, the display quality of the display section DA may decrease.

[0050] In order to improve the display quality in the display section DA of the display unit 2, the higher the intensity of ambient light reflected by the decorative layer 26, the higher the intensity of the display light in the display section DA needs to be. Therefore, in this embodiment, the brightness of each part of the display section DA may increase as the ambient light intensity increases.

[0051] More specifically, as shown in Graph G1, the display control unit 4 may control the display unit 2 such that the brightness of each part of the display unit DA increases as the ambient light intensity increases when the display unit DA is showing black. Alternatively, the display control unit 4 may control the backlight unit 22 to control the intensity of the backlight light, taking into account the brightness of each part of the display unit DA when the display unit DA is showing black. This reduces the difficulty in the display light of the display unit DA being visible to the user and improves the display quality.

[0052] To increase the brightness of each part of the display unit DA in response to increasing ambient light intensity, for example, the voltage applied to the backlight unit 22 can be increased in response to the increasing ambient light intensity to increase the intensity of the backlight light. For example, as shown in graph G2, the voltage applied to the backlight unit when the display unit DA is showing black can increase as the ambient light intensity increases.

[0053] On the other hand, if the intensity of the display light in the display section DA of the display unit 2 is increased despite low ambient light, the display in the display section DA may be performed by display light of an excessive intensity compared to the appropriate intensity, resulting in a decrease in the display quality of the display section DA. In particular, if the display light in the display section DA is excessive, the ambient light reflected by the decorative layer 26, which contributes to the display of the pattern 26P of the decorative layer 26, may become difficult for the user to see. This leads to a deterioration in the harmony of the display unit 2 with its surroundings.

[0054] In this embodiment, the display device 1, when the intensity of ambient light reflected by the decorative layer 26 is low, reduces the intensity of the backlight light through control of the backlight unit 22 by the backlight control unit 43, thereby lowering the intensity of the display light in the display unit DA. Therefore, the display device 1 improves the quality of the display in the display unit DA of the display unit 2.

[0055] <Summary of Embodiment 1> As described above, the display device 1 according to this embodiment measures the intensity of ambient light irradiated onto the decorative layer 26 and controls the display light in the display unit DA according to that intensity. For this reason, the display device 1 can improve the display quality in the display unit DA. In addition, the display device 1 achieves power saving by reducing the need to control the backlight unit 22 to emit excessively high-intensity backlight light when ambient light illuminance is low.

[0056] In this embodiment, the display device 1 corrects the intensity of the backlight light irradiated onto the liquid crystal panel 23 through the control of the backlight unit 22 by the backlight control unit 43. In other words, the display device 1 can correct the intensity of the display light in the display unit DA without correcting the video signal input to the liquid crystal panel 23. Therefore, the display device 1 achieves an improvement in the display quality of the display unit DA with a simpler configuration.

[0057] The measurement unit 3 includes a sensor 31 that receives ambient light and an intensity acquisition unit 32 that acquires the intensity of ambient light from the sensor 31 that receives ambient light. The display device 1 simplifies the configuration of the measurement unit 3 while enabling the measurement unit 3 to perform more accurate measurement of ambient light intensity.

[0058] The backlight unit 22 is equipped with multiple light-emitting elements whose light emission intensity can be individually changed, so that the intensity of the backlight light can be changed for each position in a plan view. In this case, the backlight control unit 43 may control the backlight unit 22 to correct the intensity of the backlight light for each position in a plan view, in addition to the intensity of the ambient light irradiated onto the decorative layer 26, according to the pattern 26P on the decorative layer 26.

[0059] Since the pattern 26P of the decorative layer 26 has different colors depending on its position in a plan view of the decorative layer 26, the reflectivity of incident ambient light may differ depending on its position in a plan view of the decorative layer 26. For this reason, the appropriate intensity of display light for each position of the display unit DA in a plan view may differ depending on the pattern 26P of the decorative layer 26. By correcting the intensity of the backlight light for each position in a plan view according to the pattern 26P of the decorative layer 26, the display device 1 further improves the display quality of the display unit DA.

[0060] [Embodiment 2] Other embodiments of this disclosure are described below. For the sake of clarity, components having the same function as those described in the above embodiments are denoted by the same reference numerals, and their descriptions are not repeated.

[0061] <Display panel equipped with light-emitting elements> Figure 4 shows a block diagram F41 of the display device 1 according to this embodiment and a schematic side cross-sectional view F42 of the display unit 2. In particular, schematic side cross-sectional view F42 shows a side cross-section of the display unit 2 at a position corresponding to the side cross-section of the display unit 2 shown in schematic side cross-sectional view F12 of Figure 1.

[0062] The display unit 2 of the display device 1 according to this embodiment includes a display panel 28 in place of the backlight unit 22 and liquid crystal panel 23, compared to the display unit 2 according to the previous embodiment. Except as stated above, the display unit 2 according to this embodiment may have the same configuration as the display unit 2 according to the previous embodiment.

[0063] The display panel 28 includes a circuit board 56 and a light-emitting layer 57.

[0064] The circuit board 56 includes a plurality of drive circuits that individually drive the electrodes of each light-emitting element 81 in the light-emitting element layer 57, which will be described later. The circuit board 56 may have the same configuration as the circuit board 52, except that the electrodes to which each drive circuit applies voltage are the electrodes of each light-emitting element 81, which will be described later.

[0065] The light-emitting element layer 57 is formed, for example, on the side of the decorative layer 26 of the circuit board 56, and comprises a plurality of light-emitting elements 81 and a black matrix 82.

[0066] The light-emitting element 81 is a self-luminous element that is arranged two-dimensionally at a position that overlaps with the display section DA in a plan view of the circuit board 56. For example, each of the light-emitting elements 81 may have an island-shaped electrode that connects to each of the drive circuits provided on the circuit board 56. In this case, the display panel 28 may have a common electrode on the decorative layer 26 side of the multiple light-emitting elements 81, to which a predetermined potential is applied by an auxiliary electrode (not shown).

[0067] As a result, the display panel 28 may individually control the potential difference between the island-shaped electrodes of each light-emitting element 81 and the common electrode by controlling each drive circuit of the circuit board 56, thereby individually controlling the intensity of light emitted from each light-emitting element 81. The light from each light-emitting element 81 is extracted from the display panel 28 to the decorative layer 26. Therefore, in this embodiment, the display light in the display unit DA is the light from each light-emitting element 81 included in the display panel 28.

[0068] The light-emitting element 81 according to this embodiment may be, for example, an OLED element (organic EL element) containing an organic fluorescent material or an organic phosphorescent material in its light-emitting layer. Alternatively, the light-emitting element 81 may be a QLED element containing luminescent quantum dots (semiconductor nanoparticles) in its light-emitting layer. The display panel 28 may include multiple red light-emitting elements, multiple green light-emitting elements, and multiple blue light-emitting elements arranged two-dimensionally on the circuit board 56 as the light-emitting element 81. This allows the display panel 28 to achieve color display in the display unit DA.

[0069] The black matrix 82 is located on the side surrounding the display unit DA in a plan view of the circuit board 56. The black matrix 82 includes a light-absorbing material such as black carbon that absorbs visible light, including backlight light. The black matrix 82 may have the same configuration as the black matrix 73 according to the previous embodiment, except that it is formed on the circuit board 56.

[0070] In this embodiment, the display control unit 4 of the display device 1 includes a correction unit 44 instead of a backlight control unit 43, compared to the display control unit 4 of the previous embodiment. The correction unit 44 corrects the video signal input from the generation unit 41 according to the intensity of ambient light measured by the measurement unit 3 and inputs it to the input unit 42. In this embodiment, the input unit 42 inputs the corrected video signal input from the correction unit 44 to the display panel 28 and controls the display panel 28.

[0071] As a result, the display control unit 4 controls the display on the display section DA of the display unit 2. In other words, the display control unit 4 controls the intensity of light emitted by each of the multiple light-emitting elements 81 in accordance with the image displayed by the display panel 28 and the intensity of ambient light measured by the measurement unit 3.

[0072] In particular, the correction unit 44 corrects the input signal so that the brightness of each light-emitting element 81 of the display panel 28 increases as the intensity of ambient light measured by the measurement unit 3 increases. In other words, the correction unit 44 corrects the input signal so that the brightness of each light-emitting element 81 of the display panel 28 decreases as the intensity of ambient light measured by the measurement unit 3 decreases. As a result, the display control unit 4 can control the display unit 2 to improve the display quality of the display unit DA of the display unit 2.

[0073] The display device 1 according to this embodiment includes a display panel 28 containing a plurality of light-emitting elements 81. Therefore, the display device 1 can improve the display quality in the display section DA of the display unit 2 by controlling the driving of each light-emitting element 81. In other words, for example, the display device 1 can improve the display quality in the display section DA of the display unit 2 while eliminating the need for components such as a backlight unit, polarizing plate, and liquid crystal. Thus, the display device 1 improves the display quality in the display section DA of the display unit 2 while simplifying its configuration.

[0074] Furthermore, since the display panel 28 includes multiple light-emitting elements 81 arranged two-dimensionally in a plan view, the display unit 2 can more precisely control the intensity of the display light at each part of the display section DA in a plan view. As a result, the display device 1 can correct the display light at each position of the display section DA in a plan view, according to the pattern 26P of the decorative layer 26, with a simpler configuration or with greater precision.

[0075] In this embodiment, the display control unit 4 inputs the video signal corrected by the correction unit 44 to the display panel 28, thereby correcting the intensity of the light emitted by each light-emitting element 81 and correcting the intensity of the display light in the display unit DA. As a result, the display device 1 can correct the intensity of the display light more accurately than, for example, correcting the intensity of the backlight light to correct the intensity of the display light indirectly.

[0076] [Embodiment 3] <Adjusting the characteristics of gamma correction> Figure 5 is a block diagram of the display device 1 according to this embodiment. The display device 1 according to this embodiment differs in configuration from the display device 1 according to Embodiment 1 in that the display control unit 4 further includes a correction unit 44 and a gamma adjustment unit 45. The display unit 2 and measurement unit 3 according to this embodiment each have the same configuration as the display unit 2 and measurement unit 3 according to Embodiment 1.

[0077] In this embodiment, the correction unit 44 performs gamma correction on the image signal input from the generation unit 41 and inputs the corrected image signal to the input unit 42. In this embodiment, the gamma correction in the correction unit 44 is adjusted by the gamma adjustment unit 45. In particular, the gamma adjustment unit 45 adjusts the characteristics of the gamma correction by the correction unit 44 according to the intensity of ambient light measured by the measurement unit 3.

[0078] The relationship between the adjustment of the gamma correction characteristics by the gamma adjustment unit 45 according to this embodiment and the ambient light intensity measured by the measurement unit 3 will be explained in more detail with reference to Figure 6. The graph in Figure 6 shows the relationship between the input grayscale value and the corrected brightness for each ambient light illuminance calculated from the ambient light intensity measured by the measurement unit 3. In the graph in Figure 6, the horizontal axis represents the input grayscale value and the vertical axis represents the corrected brightness. In particular, for ambient light illuminances of 0 lx, 50 lx, 250 lx, and 600 lx, the relationship between the input grayscale value and the corrected brightness is shown in Figure 6 using solid lines, dotted lines, dashed lines, and dashed lines, respectively.

[0079] For example, in this embodiment, when the ambient light intensity is 600 lx, the correction unit 44 performs gamma correction so that the ratio between the input gradation value and the gradation value corresponding to the actually output brightness is 1:1, regardless of the input gradation value. In other words, for example, in this embodiment, when the ambient light intensity is 600 lx, the correction unit 44 performs normal gamma correction on the input signal. For example, the gamma adjustment unit 45 does not need to perform gamma correction adjustment by the correction unit 44 when the ambient light intensity is 600 lx. In the graph of Figure 6, the corrected brightness on the vertical axis is set to the same value as the input gradation value when the ambient light intensity is 600 lx. Therefore, when the ambient light intensity is 600 lx, the relationship between the input gradation value and the corrected brightness is approximately a straight line.

[0080] For example, the input grayscale value, which is the grayscale value of the image signal generated by the generation unit 41, is G A The corrected tone value, which is the tone value of the image signal corrected by the correction unit 44, is G B Assuming an ambient light intensity of 600 lx, the corrected grayscale value G is calculated using a predetermined gamma value γ. B G B =G A 1 / γ This is expressed as follows. For example, the gamma value γ changes depending on the characteristics of the display unit 2, but it may typically be 2.2.

[0081] On the other hand, as shown in the graph in Figure 6, the lower the ambient light intensity, the lower the corrected brightness becomes when the input gradation value is low, and the higher the corrected brightness becomes when the input gradation value is high. In this embodiment, the gamma adjustment unit 45 adjusts the gamma correction characteristics in the correction unit 44 so that, as described above, the corrected brightness with respect to the input gradation value becomes lower when the input gradation value is low, and higher when the input gradation value is high.

[0082] As a result, the display control unit 4 according to this embodiment can control the display unit 2 so that the pattern 26P is more visible in the low-gradation light-emitting region of the display unit DA, and the display light is more visible in the high-gradation light-emitting region. Therefore, the display device 1 according to this embodiment further improves the display quality of the display unit DA.

[0083] In this embodiment, the display control unit 4, using the correction unit 44, performs gamma correction of the input gradation value of the video signal for each drive circuit of the liquid crystal panel 23. In other words, the display control unit 4, using the correction unit 44, corrects the light transmittance at each position of the liquid crystal panel 23 in a plan view according to the ambient light intensity measured by the measurement unit 3. As a result, the display device 1 can correct the light transmittance of the liquid crystal panel 23 more appropriately for each position of the display unit DA in a plan view, thereby improving the display quality of the display unit DA. In this embodiment as well, the display control unit 4 may also correct the intensity of the backlight light according to the ambient light intensity measured by the measurement unit 3 through the control of the backlight unit 22 by the backlight control unit 43.

[0084] [Embodiment 4] <Correction of video signals using correction data> Figure 7 is a block diagram of the display device 1 according to this embodiment. The display device 1 according to this embodiment differs in configuration from the display device 1 according to Embodiment 1 in that the display control unit 4 further includes a correction unit 44 and a memory 46. The display unit 2 and the measurement unit 3 according to this embodiment each have the same configuration as the display unit 2 and the measurement unit 3 according to Embodiment 1.

[0085] The memory 46 in this embodiment is a storage device that can store data and hold data at least temporarily, including various conventionally known storage devices. In particular, the memory 46 in this embodiment stores correction data, which includes the correction content of the correction unit 44 according to the intensity of ambient light measured by the measurement unit 3.

[0086] In this embodiment, the correction unit 44 corrects the video signal input from the generation unit 41 based on the correction content contained in the correction data read from the memory 46, and outputs it to the input unit 42. In other words, the correction unit 44 corrects the video signal by referring to the correction data from the memory 46 according to the intensity of ambient light measured by the measurement unit 3.

[0087] The correction data stored in memory 46 may, for example, be data representing the difference between a reference brightness for the gradation value of the video signal, corresponding to the intensity of ambient light illuminating the display unit 2, and the brightness obtained when the video signal is input to the liquid crystal panel 23 without correction. The correction of the video signal using the correction data stored in memory 46 will be explained in more detail with reference to Figure 8.

[0088] The graph in Figure 8 shows the reference luminance for the grayscale values ​​of a video signal and the luminance obtained when the video signal is input to the liquid crystal panel 23 without correction, when the ambient light intensity is a predetermined value. In the graph in Figure 8, the horizontal axis represents the grayscale values ​​of the video signal, and the vertical axis represents luminance (unit: nit). In the graph in Figure 8, the luminance obtained when the video signal is input to the liquid crystal panel 23 without correction is shown by a solid line, and the reference luminance for the grayscale values ​​of the video signal is shown by a dotted line.

[0089] At a predetermined ambient light level, the reference luminance for the gradation values ​​of the video signal is determined by calculating the appropriate luminance for each gradation value at that ambient light level using a method described later. The correction unit 44 corrects the gradation values ​​of the video signal to gradation values ​​that yield the reference luminance for those gradation values.

[0090] For example, in the example shown in the graph of Figure 8, the brightness obtained when the video signal is input to the liquid crystal panel 23 without correction will be higher than the reference brightness for the gradation value of the video signal. Therefore, in the example shown in the graph of Figure 8, the correction unit 44 corrects the gradation value of the video signal so that it is lowered to a gradation value for which the reference brightness can be obtained.

[0091] For example, as shown in the graph in Figure 8, there is a difference between the reference brightness and the brightness obtained without correction, depending on the input grayscale value. Therefore, the memory 46 stores data on the difference between the reference brightness and the brightness obtained without correction for each input grayscale value. In particular, the memory 46 may also store data for each input grayscale value, specifically the corrected grayscale value that should actually be input to the liquid crystal panel 23.

[0092] Furthermore, depending on the ambient light intensity, there is a difference between the reference brightness for a predetermined input gradation value and the brightness obtained without correction. For this reason, the memory 46 stores data on the difference between the reference brightness for a predetermined input gradation value and the brightness obtained without correction for each ambient light intensity. In particular, the memory 46 may store data for each ambient light intensity, including the corrected gradation value that should actually be input to the liquid crystal panel 23 for each input gradation value.

[0093] In this embodiment, the display control unit 4 corrects the video signal by referring to the correction data stored in the memory 46 and inputs it to the liquid crystal panel 23 to control the display on the display unit DA. Therefore, the display device 1 in this embodiment improves the display quality on the display unit DA with simpler control content.

[0094] <Creating correction data> In this embodiment, the correction data is created, for example, before the product shipment of the display device 1 and stored in the memory 46. The method for creating the correction data will be explained with reference to Figure 9. Figure 9 is a flowchart showing the method for creating the correction data of the display device 1 according to this embodiment.

[0095] In the method for creating correction data for the display device 1, for example, the input gradation value and ambient light illuminance are set. Then, when the video signal has the above input gradation value and the display unit 2 is located in the space of the above ambient light illuminance, the correction gradation value of the video signal to be input to the liquid crystal panel 23 is calculated. Then, the correction gradation value is stored in the memory 46. The above is repeated while changing the settings for the input gradation value and ambient light illuminance. In this way, correction gradation value data corresponding to the input gradation value of the video signal and ambient light illuminance is created and stored in the memory 46.

[0096] More specifically, in the method for creating correction data for the display device 1, first, for example, an input gradation value is set (step S1), and the ambient light illuminance is set at the same time (step S2). Next, while driving the entire surface of the liquid crystal panel 23 with the set input gradation value, the brightness of each part of the display unit 2 is measured with the ambient light illuminance set to the set value (step S3). The measurement in step S3 is achieved by methods such as taking a picture of the top surface of the display unit 2, including the display section DA, with a camera.

[0097] Next, the area corresponding to the display unit DA is identified from the brightness information of each part of the display unit 2 obtained in step S3 (step S4). For example, the display unit DA may be identified by extracting an area with a brightness of a predetermined value or higher from the image captured by the camera described above.

[0098] Next, to make it easier to identify the corrected gradation value, the resolution of the display unit DA and the identified area are adjusted (step S5). Step S5 may be achieved, for example, by enlarging or reducing the area cut out from the image described above.

[0099] Next, the brightness of each part of the region whose resolution was adjusted in step S5 is analyzed and a correction gradation value is calculated (step S6). Step S6 may be performed, for example, by comparing the ideal brightness at the set input gradation value and ambient light illuminance with the actual brightness at each part of the region, and then setting a correction gradation value for the set input gradation value from the brightness difference calculated. The correction gradation value calculated in step S6 is the correction gradation value corresponding to the input gradation value and ambient light illuminance set in steps S1 and S2.

[0100] Next, the calculated correction gradation values ​​are linked to the input gradation values ​​and ambient light illuminance set in steps S1 and S2, and the correction gradation value data is stored in the memory 46 (step S7). As a result, the correction gradation value data corresponding to the input gradation values ​​and ambient light illuminance set in steps S1 and S2 is stored in the memory 46.

[0101] Steps S1 to S7 described above are repeated while changing the input grayscale value and ambient light illuminance. This completes the creation of the correction data according to this embodiment and its storage in the memory 46.

[0102] <Correction data for each position of the display unit> For example, as described above, depending on the pattern 26P of the decorative layer 26, the appropriate intensity of the display light for each position of the display unit DA in a plan view may differ. Therefore, the reference brightness of the display light may differ depending on the position of the display unit DA in a plan view. Accordingly, in this embodiment, the correction data stored in the memory 46 may include information on the reference brightness of the display light relative to the intensity of ambient light irradiated onto the decorative layer 26 for each position in a plan view of the liquid crystal panel 23.

[0103] In this case, the correction unit 44 may correct the video signal by comparing the intensity of ambient light measured by the measurement unit 3 with the reference brightness obtained from the correction data stored in the memory 46 for each position of the liquid crystal panel 23 in a plan view. This allows the display control unit 4 to correct the brightness of the display light in the display unit DA for each position of the display unit DA in a plan view with simpler control content. Therefore, the display device 1 with the above configuration simplifies the control content of the liquid crystal panel 23 while further improving the display quality of the display unit DA.

[0104] Correction data, which includes information on the reference brightness of the display light relative to the intensity of ambient light irradiated onto the decorative layer 26 at each position in a plan view of the liquid crystal panel 23, may be created by modifying a part of the method described with reference to Figure 9.

[0105] For example, in the method for creating correction data in this embodiment, a predetermined area of ​​the display unit DA in a plan view may be set in conjunction with steps S1 and S2. Then, in step S3, only the drive circuits located in the set predetermined area of ​​the display unit DA may be driven with the input gradation value set in step S1, and the brightness of each part of the display unit 2 may be measured. Then, in step S4, instead of identifying the area corresponding to the display unit DA, the above-described predetermined area may be identified, and in step S5, the resolution of the identified predetermined area may be adjusted.

[0106] In this case, the corrected tone value calculated in step S6 will be the input tone value and ambient light illuminance set in steps S1 and S2, plus the corrected tone value corresponding to the predetermined area described above. In step S7, the corrected tone value data, linked to the input tone value, ambient light illuminance, and location information of the predetermined area, may be stored in the memory 46.

[0107] Steps S1 to S7 described above may be repeated while changing the input grayscale value, ambient light intensity, and the position of the predetermined area. This completes the creation of correction data corresponding to each position of the display unit DA in a plan view and the storage of said correction data in memory 46.

[0108] 〔summary〕 A display device according to Embodiment 1 of the present disclosure comprises: a display panel that emits display light; a decorative layer located on the display surface side of the display panel, having a pattern in plan view, transmitting at least a portion of the display light and reflecting at least a portion of the ambient light to display the pattern; a measuring unit that measures the intensity of the ambient light irradiated onto the decorative layer; and a display control unit that controls the display light according to the image displayed by the display panel and the intensity of the ambient light measured by the measuring unit.

[0109] A display device according to Embodiment 2 of the present disclosure may be configured such that, in Embodiment 1 above, the display panel is a liquid crystal panel having a liquid crystal layer, and the display control unit includes a backlight unit that irradiates the liquid crystal panel with backlight light, and the display control unit controls the light transmittance at each position of the liquid crystal panel in a plan view through control of the liquid crystal panel, and the display control unit also includes a backlight control unit that controls the intensity of the backlight light through control of the backlight unit.

[0110] In the display device according to embodiment 3 of the present disclosure, the backlight control unit may be configured to correct the intensity of the backlight light according to the intensity of the ambient light measured by the measuring unit, as described in embodiment 2 above.

[0111] In the display device according to embodiment 4 of the present disclosure, the display control unit may be configured to correct the light transmittance at each position of the liquid crystal panel in a plan view according to the intensity of the ambient light measured by the measuring unit, in embodiment 2 or 3 described above.

[0112] A display device according to Embodiment 5 of the present disclosure may be configured such that, in Embodiment 1 above, the display panel comprises a plurality of light-emitting elements, the display light is the light emitted by each of the plurality of light-emitting elements, and the display control unit controls the intensity of the light emitted by each of the plurality of light-emitting elements in accordance with the image displayed by the display panel and the intensity of the ambient light measured by the measuring unit.

[0113] In any of the embodiments 1 to 5 described above, the display device according to embodiment 6 of the present disclosure may be configured such that the measuring unit includes a sensor that receives ambient light and an intensity acquisition unit that acquires the intensity of the ambient light received by the sensor.

[0114] The display device according to Embodiment 7 of the present disclosure may, in any of Embodiments 1 to 6 above, include a generation unit that generates a video signal corresponding to an image to be displayed, a correction unit that corrects the video signal, and an input unit that inputs the video signal to the display panel, wherein the correction unit corrects the video signal according to the intensity of the ambient light measured by the measurement unit.

[0115] The display device according to embodiment 8 of the present disclosure may be configured such that, in embodiment 7 above, the correction unit performs gamma correction on the video signal, and the display control unit includes a gamma adjustment unit that adjusts the characteristics of the gamma correction according to the intensity of the ambient light measured by the measurement unit.

[0116] The display device according to aspect 9 of the present disclosure may be configured such that, in aspect 7 or 8 above, the display control unit includes a memory that stores correction data including correction content in the correction unit according to the intensity of ambient light measured by the measurement unit, and the correction unit corrects the video signal by referring the correction data from the memory according to the intensity of ambient light measured by the measurement unit.

[0117] The display device according to embodiment 10 of the present disclosure may be configured such that, in embodiment 9 above, the correction data includes information on the reference brightness of the display light relative to the intensity of the ambient light irradiated onto the decorative layer for each position in a plan view of the display panel, and the correction unit corrects the video signal by comparing the intensity of the ambient light measured by the measurement unit with the reference brightness for each position in a plan view of the display panel.

[0118] This disclosure is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of this disclosure. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

[0119] For example, the display control unit 4 of the display device 1 according to Embodiment 3 or Embodiment 4 may correct the intensity of the backlight light through the control of the backlight unit 22 by the backlight control unit 43. In this case, the correction unit 44 of the display control unit 4 may perform correction of the video signal taking into account the correction of the backlight light intensity.

[0120] Furthermore, the display unit 2 of the display device 1 according to Embodiment 3 or Embodiment 4 may include a display panel 28 according to Embodiment 2 instead of a liquid crystal panel 23. In this case, the display control unit 4 does not need to include a backlight control unit 43. Also in the above case, the input unit 42 of the display control unit 4 may input a video signal corrected by the correction unit 44 to the display panel 28. [Explanation of symbols]

[0121] 1 Display device 2 Display Units 3 Measuring part 4 Display Control Unit 21 cabinets 22 Backlight Units 23 LCD panel 26 Decorative Layers 26P Pattern 28 Display Panel 31 Sensors 32 Strength acquisition section 41 Generation part 42 Input section 43 Backlight Control Unit 44 Correction section 45 Gamma adjustment section 46 memory 81 Light-emitting element

Claims

1. A display panel that emits display light, A decorative layer located on the display surface side of the display panel, having a pattern in plan view, transmitting at least a portion of the display light and reflecting at least a portion of the ambient light to display the pattern, A measuring unit for measuring the intensity of the ambient light irradiated onto the decorative layer, A display device comprising: an image displayed on the display panel and a display control unit that controls the display light according to the intensity of the ambient light measured by the measuring unit.

2. The aforementioned display panel is a liquid crystal panel equipped with a liquid crystal layer, The LCD panel is equipped with a backlight unit that illuminates it with backlight light. The display control unit controls the light transmittance at each position of the liquid crystal panel in a plan view through the control of the liquid crystal panel, The display device according to claim 1, wherein the display control unit includes a backlight control unit that controls the intensity of the backlight light through the control of the backlight unit.

3. The display device according to claim 2, wherein the backlight control unit corrects the intensity of the backlight light according to the intensity of the ambient light measured by the measuring unit.

4. The display device according to claim 2, wherein the display control unit corrects the light transmittance at each position of the liquid crystal panel in a plan view according to the intensity of the ambient light measured by the measuring unit.

5. The display panel comprises a plurality of light-emitting elements, The display light is the light emitted by each of the plurality of light-emitting elements. The display device according to claim 1, wherein the display control unit controls the intensity of light emitted by each of the plurality of light-emitting elements in accordance with the image displayed by the display panel and the intensity of the ambient light measured by the measuring unit.

6. The display device according to any one of claims 1 to 5, wherein the measuring unit includes a sensor that receives ambient light and an intensity acquisition unit that acquires the intensity of the ambient light received by the sensor.

7. The display control unit includes a generation unit that generates a video signal corresponding to the image to be displayed, a correction unit that corrects the video signal, and an input unit that inputs the video signal to the display panel. The display device according to any one of claims 1 to 5, wherein the correction unit corrects the video signal according to the intensity of the ambient light measured by the measurement unit.

8. The correction unit performs gamma correction on the video signal. The display device according to claim 7, wherein the display control unit includes a gamma adjustment unit that adjusts the characteristics of the gamma correction according to the intensity of the ambient light measured by the measurement unit.

9. The display control unit includes a memory that stores correction data, including the correction content in the correction unit according to the intensity of the ambient light measured by the measurement unit. The display device according to claim 7, wherein the correction unit corrects the video signal by referring the correction data from the memory according to the intensity of the ambient light measured by the measurement unit.

10. The correction data includes information on the reference brightness of the display light relative to the intensity of the ambient light irradiated onto the decorative layer, for each position in a plan view of the display panel. The display device according to claim 9, wherein the correction unit corrects the video signal by comparing the intensity of the ambient light measured by the measurement unit with the reference brightness for each position in a plan view of the display panel.

Images