How to use timer without flickering using ASP.NET C#?

Here is my Code:


        protected void Page_Load(object sender, EventArgs e)
        {
            try
            {
                if (!Page.IsPostBack)
                {
                    CompID = objGlobal.HRCompanyID;
                    BindNextImage();
                }
             

            }

            catch (Exception ex)
            {
               
            }
            return;


        }
        protected void Timer1_Tick(object sender, EventArgs e)
        {
            BindNextImage();
        }


        public void BindNextImage()
        {
            try
            {
                ClearControls();
                Random _rand = new Random();
                dtData = objTvImage.getImage(CompID);
                int i = _rand.Next(0, dtData.Rows.Count);

                lblCompName.Text = dtData.Rows[i]["CompanyName"].ToString();
                lblDepName.Text = dtData.Rows[i]["Department"].ToString();
                lblEmpName.Text = dtData.Rows[i]["Name"].ToString();
                lblMonth.Text = dtData.Rows[i]["Designation"].ToString();
                lblDate.Text = dtData.Rows[i]["Date Of Birth"].ToString();
                GetImage((byte[])dtData.Rows[i]["Image"]);

                //To get templates

                if (lblDate.Text == "TRANSFER")
                {
                    pnlImage.BackImageUrl = "~/Images/" + "TRAN.jpg";
                }
                else if (lblDate.Text == "PROMOTED")
                {
                    pnlImage.BackImageUrl = "~/Images/" + "PRO.jpg";
                }
                else
                {
                    int day = (int)System.DateTime.Now.Day;
                    pnlImage.BackImageUrl = "~/Images/" + "BDay" + day.ToString() + ".jpg";
                }


            }

            catch (Exception ex)
            {
            }
        }

    }