CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit and priority from Republic of Korea Patent Application No. 10-2020-0098862, filed in the Republic of Korea on Aug. 6, 2020, the entire contents of which are hereby incorporated by reference its entirety.

BACKGROUND

Technical Field

The present disclosure relates to a display device.

Description of the Related Art

Among the display devices currently being developed, there is a self-luminous display device in which the display panel emits light by itself. In order to emit light by itself, a display panel of such the self-luminous display device may include subpixels including a light emitting device and a driving transistor for driving the light emitting device.

Each of circuit elements such as driving transistors and light emitting devices arranged on the display panel of the self-luminous display device has unique characteristic values. For example, the driving transistor has intrinsic characteristic values such as threshold voltage and mobility, and the light emitting device has intrinsic characteristic values such as threshold voltage.

The circuit elements in each subpixel are degraded according to the driving time, so that their unique characteristic values may change. There may be a difference in driving time for each subpixel, and due to this, the degree of change in characteristic values between circuit elements of the subpixels may be different. Accordingly, as the driving time elapses, a variation in characteristic values of the subpixels may occur, and thus a variation in luminance between the subpixels may occur. The luminance deviation between the subpixels degrades the luminance uniformity of the display panel, and may eventually become a major factor causing the image quality to deteriorate.

Accordingly, various compensation techniques have been developed to sense and compensate for luminance deviations between subpixels. However, in the case of the currently developed compensation technologies, it is necessary to have a complicated subpixel structure and a complicated signal wiring structure for sensing luminance deviation between subpixels. A driving method for sensing characteristic values of subpixels having such a complicated structure may also be complex.

SUMMARY

The present disclosure provides a display device that senses luminance of subpixels and compensates for luminance deviations of subpixels without a complicated subpixel structure and a complicated signal wiring structure, and without performing complicated sensing driving.

The present disclosure provides a display device having a movable sensor structure outside a display panel and performing an accurate compensation function by using the movable sensor structure.

The present disclosure provides a display device including a display panel having a high aperture ratio and high resolution by sensing luminance of subpixels and compensating for luminance deviations of subpixels without a complicated subpixel structure and a complicated signal wiring structure.

According to aspects of the present disclosure, there is provided with a display device including: a display panel including a plurality of data lines, a plurality of gate lines, and a plurality of subpixels, each of the plurality of subpixels including a light emitting device and a driving transistor; a housing protecting the display panel; a moving bar installed in the housing so as to be movable and moving at the front of a viewing surface of the display panel; a plurality of sensor modules mounted on the moving bar to face the viewing surface of the display panel; and a sensing controller configured to control movement of the moving bar, control an operation of the plurality of sensor modules, and receive sensing values of each of the plurality of sensor modules.

The moving speed of the moving bar may be constant.

Alternatively, the moving speed of the moving bar may be variable. In this case, the moving speed of the moving bar may increase or decrease according to the operation of the plurality of sensor modules.

The display device may further include a moving actuator device that allows the moving bar to move up and down at the front of the viewing surface of the display panel.

The moving actuator device may include a first shaft installed on an upper side of the display panel, a second shaft installed on a lower side of the display panel, a first wire having a first end coupled to the left side of the first shaft and a second end coupled to the left side of the second shaft to interlock the first shaft and the second shaft, a second wire having a first end coupled to the right side of the first shaft and a second end coupled to the right side of the second shaft to interlock the first shaft and the second shaft, a first motor rotating the first shaft, and a second motor rotating the second shaft.

The left side of the moving bar may be coupled to the first wire. The right side of the moving bar may be coupled to the second wire.

As the second shaft rotates by the second motor, the first wire and the second wire may be wound around the second shaft, and the moving bar may descend. As the first shaft rotates by the first motor, the first wire and the second wire may be wound around the first shaft, and the moving bar may rise.

The moving bar may comprise a gap maintaining device that allows a gap between the plurality of sensor modules and the display panel to become a constant operable distance. The gap maintaining device may comprise at least one fan device that sucks and discharges air in the space between the display panel and the moving bar, and two or more spacers protruding toward the display panel.

Each of the plurality of sensor modules may include a luminance sensor configured to sense a luminance of a point located on the viewing surface of the display panel according to the movement of the moving bar, and an light controller positioned between the display panel and the luminance sensor, in which light emitted from the display panel is incident, and light within a predetermined angle with a vertical direction of the display panel is output.

For example, the light controller may include at least one of a first light control film that filters light in a first direction and a second light control film that filters light in a second direction crossing the first direction.

For another example, the light controller may include an optical filter including a transmissive layer and a non-transmissive layer. The non-transmissive layer may include at least one of a front non-transmissive layer positioned on the front surface of the transmissive layer and a rear non-transmissive layer positioned on a rear surface of the transmissive layer. A plurality of first slits may be formed in the front non-transmissive layer, and a plurality of second slits may be formed in the rear non-transmissive layer in a direction crossing the plurality of first slits.

In the moving bar, a plurality of sensor modules may be arranged in one row or in two or more rows.

The plurality of subpixels may include a plurality of subpixel rows. The horizontal length of the moving bar may be greater than or equal to a row direction length of one subpixel row among the plurality of subpixel rows. The vertical length of the moving bar may be greater than or equal to a column length of one subpixel row among the plurality of subpixel rows or greater than or equal to a column direction lengths of two or more subpixel rows among the plurality of subpixel rows.

At one time point in the period during which the moving bar moves, one subpixel of the plurality of subpixels may overlap one sensor module or two or more sensor modules.

The sensing controller may be configured to: control to display a sensing image on the display panel, control at least one of a moving speed and a moving direction of the moving bar; control a sensing operation of each of the plurality of sensor modules; receive sensing values for luminance from each of the plurality of sensor modules; and store information in a look-up table or change information previously stored in the look-up table based on the sensing values received from each of the plurality of sensor modules.

While the moving bar is moving, the sensing image may be displayed in an entire area or only one or more partial areas of the display panel.

While the moving bar is moving, an area in which the sensing image is displayed on the display panel may move according to a movement of the moving bar.

The display device may further include a data driving circuit configured to drive the plurality of data lines and a display controller configured to supply image data to the data driving circuit based on the image signal input from a host module.

When the image signal is not supplied from the host module to the display controller, the moving bar may move and the plurality of sensor modules may operate.

The plurality of sensor modules and the sensing controller may communicate with each other through a wired method or a wireless method.

According to aspects of the present disclosure, it is possible to provide a display device that senses luminance of subpixels and compensates for luminance deviations of subpixels without a complicated subpixel structure and a complicated signal wiring structure, and without performing complicated sensing driving.

According to aspects of the present disclosure, it is possible to provide a display device having a movable sensor structure outside a display panel and performing an accurate compensation function by using the movable sensor structure.

According to aspects of the present disclosure, it is possible to provide a display device including a display panel having a high aperture ratio and high resolution by sensing luminance of subpixels and compensating for luminance deviations of subpixels without a complicated subpixel structure and a complicated signal wiring structure.

